E-LETTER on Systems, Control, and Signal Processing ISSUE No. 52, PART 1, 15 July 1992 Editors: Bradley W. Dickinson bradley@princeton.edu or bradley@pucc.bitnet Eduardo D. Sontag sontag@hilbert.rutgers.edu or sontag@pisces.bitnet *** To watch for in this issue: an article on fuzzy control and SCAD database update in Part 3, and several conference programs in Part 2 *** Welcome. We remind you that items for posting can be emailed to either of the editors. PLEASE SEND CONTRIBUTIONS, since the eletter can only be useful if everyone participates. A REQUEST: It would be useful if articles are already sent in the format that we use, starting with a "Contributed by:..." and a title centered in the next line. In addition, please provide a 60-character title for the Contents. Thanks! NOTE: if you are using an editor to read this mailing and if at any point you wish to skip to the next article, you can accomplish this by searching for the string: *.** Contents Part 1: Changes to mailing list Personals: People on the move Awards and Recognitions IFAC News: Working Group on "Air Traffic Control Automation" Journals: TOC November 1992 Issue of IFAC Journal AUTOMATICA RENDICONTI DEL SEM. MAT. UNIV. POLITEC.,TORINO: a special issue TOC Volume 172 Contents of LAA TOC Circuits, Systems, and Signal Processing 11, No. 4, 1992 LAA Special Pensacola Conference Issue The new IEEE Transactions on Control Systems Technology IEEE Trans Control Sys Tech Special Issue: AIR TRAFFIC CONTROL VLSI Signal Processing: Special Issue Analog VLSI Computation SIAM Journal on Matrix Analysis and Applic, Oct 1992 (13, 2) Part 2: Conferences: (The 3 PROGRAMs will be found in Part 2 of the E-Letter) Intl. School on Optimal Control, Moscow, 14-25 Sep 1992 MTNS 93, August 2-6, 1993, Regensburg, Germany Columbia Workshop on Telecomm, Sep 21-22, 1992, New York IFAC Control Applications of Optimization, PROGRAM Ninth Intl. Conf Sys Eng, Las Vegas, 14-16 July 1993 Workshop Discrete Event Systems, Aug 26-28,'92, Prague, PROGRAM IEEE Regional Control Conf, July 24-25, 1992, Brooklyn, PROGRAM Methodologies Intell Sys, Trondheim, Norway, June 15-18, 1993 IMACS Math. Intell. Models Syst. Simul., Brussels, Ap 12-16, '93 Part 3: New Books Published: Book Announcement, George D. Byrne Faculty Positions Available/Wanted: Position Wanted UPATE ON SCAD DATABASE Reports available: Reports, Electronic Sys Signals Lab, Wash U Misc: Gnans -- **FREE** program for simulation of dynamical systems "Fuzzy Control: Facts, Japan, and Europe," by Pierre Bernhard *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by the Editors: Changes/Additions to mailing list. Changes and Corrections: ------------------------ bengt@mathematik.uni-Bremen.de (Bengt Martensson, Univ. of Bremen, FRG) sowers@math.usc.edu (Richard B. Sowers, Univ. of So. California) selbuz@trmbeam.bitnet (Hasan Selbuz, TUBITAK, Marmara Research Center, Turkey) vasfi@trmbeam.bitnet (Vasfi Eldem, TUBITAK, Marmara Research Center, Turkey) mvelez@rmece01.upr.clu.edu (Miguel Velez-Reyes, Univ. of Puerto Rico, Mayaguez) murray@design.caltech.edu (Richard M. Murray, Caltech) steinbuc@prl.philips.nl (Maarten Steinbuch, Philips, Eindhoven) toelf@math.liu.se (Tommy Elfving, Linkoping Univ., Sweden) jlml@inesc.pt (Joao Lage Miranda Lemos, INESC, Lisboa) mkaliski@tesla.elee.calpoly.edu (Martin Kaliski, Cal. Poly. San Luis Obispo) cmaccarl@tesla.elee.calpoly.edu (Carl MacCarley, Cal. Poly., San Luis Obispo) ilic@athena.mit.edu (Marija Ilic, MIT) kchan@stat.uiowa.edu (Kung-Sik Chan, Univ. of Iowa, Iowa City) pwong@hplpww.hpl.hp.com (Ping Wah Wong, Hewlett-Packard Labs, Palo Alto, CA) mgar@homxc.att.com (Mario Garzia, AT&T Bell Labs, Holmdel) pglasser@research.gsb.columbia.edu (Paul Glasserman, Columbia Univ.) nader@owgvm0.vnet.ibm.com (Nader Mehravari, IBM, Owego, NY) Additions: --------- ubdesai@cc.iitb.ernet.in (U. B. Desai, Indian Inst. of Techn., Bombay) hush@c3serve.c3.lanl.gov (Don R. Hush, Univ. of New Mexico, Albuquerque) maskarinec@ece.drexel.edu (Gregory J. Maskarinec, Drexel Univ., Philadelphia) arambel@hilbert.coe.northeastern.edu (Pablo Arambel, Northeastern Univ.) jstiver@okeefe.helios.nd.edu (Jim Stiver, Notre Dame Univ.) prabhu@cae.wisc.edu (Vittal Prabhu, Univ. of Wisconsin, Madison) con_dwebb@vaxc.stevens-tech.edu, (Douglas Webb, Stevens Institute of Techn.) trh@beethoven.che.caltech.edu (Tyler R. Holcomb, Caltech) dal@bobcat.ent.ohiou.edu ( Douglas Lawrence, Ohio University, Athens) phillips@bishop.eeap.cwru.edu (Stephen Phillips, Case Western Reserve Univ.) mueller@iaas-berlin.dbp.de (Wolfdietrich Mueller, Inst. for Appl. Analysis) grad0006@aem.umn.edu (Zohreh Mirfakhraie, Univ. of Minnesota, Minneapolis) marika@irmunisa.ing.uniroma1.it (Marica Di Benedetto, Univ. of Rome) shenoy@sdr.slb.com (Ram Shenoy, Schlumberger-Doll Research, Ridgefield, CT) murphy@aplsp.dnet.nasa.gov (Pat Murphy, Johns Hopkins Applied Physics Lab) rsm@math.arizona.edu (Robert S. Maier, Univ. of Arizona, Tucson) pino@sail.uwaterloo.ca (Pino Porciello, Univ. of Waterloo, Ontario, Canada) enos@fields.waterloo.edu (Mike Enos, Fields Inst., Waterloo, Ontario, Canada) her@pc-sun1.me.umn.edu (Ming-guo Her, Univ. of Minnesota, Minneapolis) raterink@sweetpea.jsc.nasa.gov (Keith E. Raterink, NASA Johnson Space Center) chess@ncsa.uiuc.edu (Christopher Hess, Univ. of Illinois, Urbana) ss4i@kelvin.seas.virginia.edu (Sriram Srinivasan, Univ. of Virginia) suraman@umaxc.weeg.uiowa.edu (Sundar Raman, Univ. of Iowa, Iowa City) elexujx@nuscc.nus.sg (Xu Jian-Xin, National University of Singapore) Bert.Baker@uc.edu (Albert D. Baker, University of Cincinnati) butler@spdc.ti.com (Stephanie Watts Butler, Texas Instruments, Dallas) pwm@macaw.jhuapl.edu (Phil Miller, Johns Hopkins Applied Physics Lab) ng@wizard.me.umn.edu (Yvonne Ng, Univ. of Minnesota, Minneapolis) korn%erau@gatech.edu (Andrew J. Kornecki, Embry Riddle Aero. U., Daytona Beach) csli@watson.ibm.com (Chung-Sheng [Johnson] Li, IBM Watson Rsch. Labs) engell@astaire.chemietechnik.uni-dortmund.de (Sebastian Engell, U. of Dortmund) skoge@kjemi.unit.no (Sigurd Skogestad, Univ. of Trondheim, Norway) reggie@itk.unit.no (Reggie Davidrajuh, Norwegian Institute of Tech.,Trondheim) jbduffi@eng.clemson.edu (John Duffie, Clemson Univ., SC) ddawson@eng.clemson.edu (Darren Dawson, Clemson Univ., SC) mohse-n@eng.buffalo.edu (Nader Mohsenian, SUNY Buffalo) ersicchen@er.ele.tue.nl (Chen Haijun, Eindhoven Univ. of Tech., Netherlands) *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by the Editors -- PERSONALS ********** PEOPLE ON THE MOVE ************ (1) David Elliott of the Dept. of Systems Science and Mathematics, Washington University (St. Louis) will be Visiting Senior Research Scientist at the Systems Research Center of the University of Maryland, College Park, MD 20742. He will continue his editorial activities for the IEEE Trans. Auto. Control and Systems & Control Letters-- and begin new projects. Email: delliott@src.umd.edu (2) Miguel Velez-Reyes finished his PhD degree at MIT in June and have accepted an Assistant Professor position at the University of Puerto Rico, Mayaguez Campus. His work address (starting July 1st) is Prof. Miguel Velez-Reyes Department of Electrical and Computer Engineering University of Puerto Rico Mayaguez Campus P.O. Box 5000 Mayaguez, P.R. 00681-5000 USA Tel. (809) 832-4040 x.3086 (3) Henry Wolkowicz will be on sabbatical leave September/92 to June/93 at the Department of Civil Engineering and Operations Research Princeton University: (Henry Wolkowicz; Department of Combinatorics and Optimization; Faculty of Math.; Univ. of Waterloo; Waterloo, Ont., Canada N2L 3G1 (519-888-4597 office; 746-6530 FAX; switchboard 885-1211; home 623-3182) {hwolkowicz@orion.uwaterloo.ca; na.wolkowicz@na-net.ornl.gov}) (4) Gary M. Kuhn has accepted the invitation of Siemens Corporate Research to become a Group Leader in Pattern/Signals Processing and Classification Methods. This Group forms part of the Learning Department at SCR. He will begin work at Siemens on Monday 27 July 1992. at 8:00 AM --editor's note :-) New email address: gmk@learning.siemens.com (5) Nader Mehravari has left AT&T Bell Labs and joined IBM in Owego, NY. His new address, phone, and email are as follows: Nader Mehravari IBM Corporation Route 17c Mail Drop 0210 Owego, NY 13827-1298 Phone: 607-751-2624 Fax: 607-751-6025 Email: nader@owgvm0.vnet.ibm.com ********** AWARDS AND RECOGNITION ************ (from Kishan Baheti): The National Science Foundation has announced 202 scientists and engineers to receive 1992 NSF Young Investigator Awards (NYI). These were selected from over 1600 nominations. These have replaced the previous PYI awards. The 1992 awardees in control theory are: Jeff Shamma (University of Texas, Austin) Nazli Gundes (University of California, Davis) Nazli is the first researcher in the Electrical Engineering Department at Davis who has won a PYI/NYI award. (from John Cozzens) These are the winners of NYI awards in areas related to signal processing and communications: Circuits and Signal Processing - John H. Cozzens, Program Director Terri S. Fiez, Washington State University Keshap K. Parhi, University of Minnesota Eve Riskin, University of Washington Woodward Yang, Harvard University Networking and Communications Research - Aubrey M. Bush, Program Director Nicholas Bambos, UCLA Michael W. Marcellin, University of Arizona CONGRATULATIONS TO ALL! ******* send us more information for the gossip column!!! ******* *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Satish C. Mohleji INTERNATIONAL FEDERATION OF AUTOMATIC CONTROL Working Group on "Air Traffic Control Automation" formed in the Aerospace Technical Committee The objective of this Working Group is to: 1) provide an overview of the state of the art and technological enhancements to the management and control of air traffic; 2) promote theory and application of automatic control to air traffic management ; 3) address global issues for transitioning from current manual operations to an automated air traffic control (ATC) system using satellite-based communication, navigation, and surveillance (CNS) systems; and 4) make recommendations to the civil aviation community based on Working Group activities. Specific areas of interest include ATC applications of: - Digital communication and satellite data link - Global Navigation Satellite Systems - Automatic Dependent Surveillance - Flight Management and Guidance systems - Artificial intelligence and expert systems - Human factors techniques The Working Group solicits individuals from academia, industry and national/international organizations involved in air traffic control automation research. The group expects to conduct technical meetings on specialized topics in ATC automation, participate in symposia and world congresses, and initiate an informal electronic newsletter for exchange of ideas on related subjects. For further information, contact Dr. Satish C. Mohleji Center for Advanced Aviation System Development The MITRE Corporation 7525 Colshire Drive McLean, VA 22102, U.S.A. Telephone: (703) 883-6030 E-Mail: smohleji@mitre.org *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Huibert Kwakernaak TOC FOR THE 114TH ISSUE OF THE IFAC JOURNAL AUTOMATICA November 1992 Survey Paper: Neural Networks for Control Systems: A Survey K.J. Hunt, D. Sbarbaro, R. Zbikowski and P.J. Gawthrop Papers: Optimal Control Drug Scheduling in Cancer Chemotherapy R.B. Martin On the Computation of Reference Signal Constraints for Guaranteed Tracking Performance T.J. Graettinger and B.H. Krogh Global Boundedness of Discrete-Time Adaptive Control Just Using Estimator Projection C. Wen and D.J. Hill Pole Assignment for Linear Time-Invariant Systems by Periodic Memoryless Output Feedback D. Aeyels and J.L. Willems Hinf-Optimal Control for Singularly Perturbed Systems Part I: Perfect State Measurements Z. Pan and T. Basar Extreme Point Results for Robust Stability of Interval Plants: Beyond First Order Compensator B.R. Barmish and H.I. Kang Brief Papers: Artificial Neural Networks in Process Estimation and Control M.J. Willis, G.A. Montague C. Di Massimo, M.T. Tham and A.J. Morris Partial State Reference Model Adaptive Control of Multivariable Systems M. M'Saad and G. Sanchez Design and Implementation of Petri Net Based Supervisor for a Flexible Manufacturing System F. DiCesare and M-C. Zhou A Modified Variable Structure Controller K-K. Shyu, Y-W. Tsai and C-F. Yung An Iterative Learning Control Theory for a Class of Nonlinear Dynamic Systems T-Y. Kuc and J.S. Lee Robust Eigenvalue Assignment for Generalized Systems V.L. Syrmos and F.L. Lewis Stable Redesign of Predictive Control E. Mosca and J. Zhang Recursive Solution of Generalized Predictive Control and its Equivalence to Receding Horizon Tracking Control W.H. Kwon, H. Choi, D.G. Byun and S. Noh A Multiple Controller Structure and Design Strategy with Stability Analysis W. Yan and J.B. Moore A Nonlinear Fuzzy Controller with Linear Control Rules is the Sum of a Global Two-Dimensional Multilevel Relay and a Local Nonlinear Proportional- Integral Controller H. Ying Universal Fuzzy Controllers J.J. Buckley Complete Decomposition Algorithm for Nonconvex Separable Optimization Problems and Applications S-Y. Lin Reachable, Controllable Set and Stabilizing Control of Constrained Linear Systems J.B. Lasserre Dynamic Boundary Control of the Timoshenko Beam O. Morgul A Multirate Controller Design of Linear Periodic Time Delay Systems N-Z. Yen and Y-C. Wu Induced Norms for Sampled-Data Systems N. Sivashankar and P.P. Khargonekar Necessary and Sufficient Conditions for Global Optimality for Linear Discrete-Time Systems N.S. Rousan Technical Communiques IFAC Report A Contemplative Stance on the Automation of the Mining, Mineral, and Metal Processing-Industry (MMM) G. Sommer Book Reviews Knowledge-Based Systems for Industrial Control, Edited by J. McGhee, M.J. Grimble and P. Mowforth H.B. Verbruggen Jump Linear Systems in Automatic Control, by M. Mariton J.H. van Schuppen Control of Machines with Friction, by Brian Armstrong-Helouvry R.W. Daniel Self-Tuning Systems, Control and Signal Processing, by P.E. Wellstead and M.B. Zarrop S. Shin Temporal Logic for Real-Time Systems, by J.S. Ostroff L. Motus ================================ Huibert Kwakernaak, Editor and Deputy Editor-in-Chief AUTOMATICA, The IFAC Journal University of Twente P. O. Box 217, 7500 AE Enschede The Netherlands -------------------------------- Street address: Drienerlolaan 5, 7522 NB Enschede, The Netherlands -------------------------------- Telex 22400 Telephone Intl+31/53-893457 FAX Intl+31/53-340733 E-mail automat@math.utwente.nl *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: A. Bacciotti RENDICONTI DEL SEMINARIO MATEMATICO DELL'UNIVERSITA' E DEL POLITECNICO DI TORINO: A SPECIAL ISSUE Some years ago, The Rendiconti del Seminario Matematico dell'Universita' e del Politecnico di Torino published as a special issue the proceedings of a conference held in Torino (Italy) on "Linear and Nonlinear Mathematical Control Theory" (1987). Today, the same journal publishes a collection of articles devoted to the "Mathematical Theory of Dynamical Systems and Ordinary Differential Equations" (A. Bacciotti, A. Cellina and R. Conti Ed.s). The articles appear in two consecutive issues, according to the following list. Fascicolo 48 (2), 1990 M. Sabatini, Global Asymptotic Stability of Critical Points in the Plane A. Cellina e R.M. Colombo, Some Qualitative and Quantitative Results on a Differential Inclusion D. Lupo e M. Ramos, Some multiplicity results for two-point boundary value problems near resonance V. Staicu, On the existence of solutions to a class of differential inclusions G. Anichini e G. Conti, Existence of solutions of a boundary value problem through the solution map of a linearized type problem E. Serra, Some remarks on a delay-differential equation J. Andres, M. Gaudenzi e F. Zanolin, A transformation theorem for periodic solutions of nondissipative systems K. Tchon, Non-genericity of a realization problem for observed dynamics M. Cecchi e M. Marini, On the continuability and boundedness of solutions of functional differential equations L. Mazzi, Invariant Measures for plane systems with finitely many singularities Fascicolo 48 (3), 1990 F. Wyman, K. Sain, G. Conte e A.M. Perdon, Algebraic and system theoretic notions of poles and zeros for matrices of rational functions A. Halanay, Advances in Linear Control Theory and Riccati Equations L. Pandolfi, Dichotomy properties and inertia of perturbed matrices F. Rampazzo, Some Remarks on the Use of Constraints as Controls in Rational Mechanics C. Sartori, On the continuity with respect to a parameter of the value function in some optimal control problems R. M. Bianchini e G. Stefani, Time-optimal problem and time- optimal map ############################################### A limited number of free copies is available. If you are interested and your library does not receive the "Rendiconti", please contact me. ############################################### *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Richard A. Brualdi LAA VOLUME 173, AUGUST 1992 Contents Volume 173, August 1992 Miron Tismenetsky (Haifa, Israel) Some Properties of Solutions of Yule-Walker Type Equations 1 Robert L. Ellis and David C. Lay (College Park, Maryland) Factorization of Finite Rank Hankel and Toeplitz Matrices 19 Tomasz Szulc (Poznan, Poland) On a Criterion for the Nonsingularity of Complex Matrices 39 Aleksander Simonic (Halifax, Nova Scotia, Canada) Matrix Groups With Positive Spectra 57 Ji-guang Sun (Umea, Sweden) Rounding-Error and Perturbation Bounds for the Cholesky and LDLT Factorizations 77 Aurelian Gheondea (Bucharest, Romania) One-Step Completions of Hermitian Partial Matrices With Minimal Negative Signature 99 Miroslav Fiedler (Praha, Czechoslovakia) and Thomas L. Markham (Columbia, South Carolina) A Classification of Matrices of Class Z 115 V. Hussin, P. Winternitz (Montreal, Quebec, Canada), and H. Zassenhaus (Columbus, Ohio) Maximal Abelian Subalgebras of Pseudoorthogonal Lie Algebras 125 Ivo Marek (Praha, Czechoslovakia) Collatz-Wielandt Numbers in General Partially Ordered Spaces 165 Russell Merris (Hayward, California) Unimodular Equivalence of Graphs 181 B. Beckermann, A. Neuber, and G. Muhlbach (Hannover, Germany) Shanks's Transformation Revisited 191 A. J. Pryde (Clayton, Victoria, Australia) A Bauer-Fike Theorem for the Joint Spectrum of Commuting Matrices 221 R. B. Bapat (New Delhi, India) and G. Constantine (Pittsburgh, Pennsylvania) An Enumerating Function for Spanning Forests With Color Restrictions 231 Larry Neal and George Poole (Johnson City, Tennessee) REPORT: A Geometric Analysis of Gaussian Elimination. II 239 BOOK REVIEWS Raphael Loewy (Haifa, Israel) Review of Perturbation Bounds for Matrix Eigenvalues by R. Bhatia 265 Bryan L. Shader (Laramie, Wyoming) Review of Combinatorial Matrix Theory by Richard A. Brualdi and Herbert J. Ryser 273 Author Index 277 Special Issues in Progress Proceedings of the International Workshop on Linear Models, Experimental Designs and Related Matrix Theory (August 6*B18, 1990, Tampere, Finland); special editors are Jerzy K. Baksalary and George Styan. To appear as Volume 176, November 1992. Numerical Linear Algebra Methods in Control, Signals and Systems; special editors are Gregory Ammar, Volker Mehrmann, Nancy K. Nichols, and Paul Van Dooren. Submission deadline: July 31, 1992. Details in Volume 157, November 1, 1991. Proceedings of the Workshop on Computational Linear Algebra in Algebraic and Related Problems (July 27*B1August 1, 1992, Essen, Germany); special editors are R. M. Guralnick and G. O. Michler. Submission deadline: October 30, 1992. Details provided with the workshop invitation. Proceedings of the Second Conference of the International Linear Algebra Society at Lisbon; special editors are J. A. Dias Da Silva, Chi-Kwong Li, and Graciano de Oliveira. Submission deadline: October 30, 1992. Details provided with the conference announcement. Special Issue Honoring Ingram Olkin: special editors are Friedrich Pukelsheim, George P. H. Styan, Henry Wolkowicz, and Ion Zaballa. Submission deadline: August 31, 1992. Details in Volume 160, January 1, 1992. Special Issue Honoring Marvin Marcus; special editors are Bryan E. Cain, Moshe Goldberg, Robert Grone, and Nicholas J. Higham. Submission deadline: December 31, 1992. Details in Volume 161, January 15, 1992. Linear Systems and Control, Third Special Issue; special editors are$B A. C. Antoulas, P. A. Fuhrmann, M. L. J. Hautus, and Y. Yamamoto. Submission deadline: November 30, 1992. Details in Volumes 162*B1164, February 1992. Special Issue Honoring Chandler Davis; special editors are Rajendra Bhatia, Shmuel Friedland, and Peter Rosenthal. Submission deadline: March 31, 1993. Details in Volume 169, May 1992. Special issues are available to individuals at a reduced rate. For further information, please contact Yusuf Guvenc, Journals Customer Service, Elsevier Science Publishing Co., 655 Avenue of the Americas, New York, NY 10010; Tel. 212-633-3955; Fax 212-633-3990. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: A. H. Zemanian (zeman@sbee.sunysb.edu) Table of contents for: CIRCUITS, SYSTEMS, AND SIGNAL PROCESSING Vol. 11, No. 4, 1992 CONTENTS: Statistical analysis of decentralized MUSIC, Torsten Soderstrom and Petre Stoica Rotationally invariant pecstrum: A rotationally invariant object descriptor based on mathematical morphology, Simon W. L. Pong and Anastasios Venetsanopoulos Closed-form coefficient expressions of typical two-dimensional band-select linear-phase FIR filters, S. Alliney, G. Cortelazo, and G. A. Mian *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Hans Schneider LINEAR ALGEBRA AND ITS APPLICATIONS SPECIAL PENSACOLA CONFERENCE ISSUE A special issue of "Linear Algebra and its Applications" will be devoted to papers presented at the third ILAS Conference to be held in Pensacola, FL, 17-20 March 1993. This issue will contain only papers that meet the publication standards of the journal, and that are approved by normal refereeing procedures. The special editors of this issue are Professors Dianne P. O'Leary, Leiba Rodman and Helene Shapiro to whom papers for the issue should be submitted. The submission deadline is 30 June 1993. Dianne P. O'Leary Computer Science Department University of Maryland College Park, MD 20741 oleary@cs.umd.edu Leiba Rodman Department of Mathematics College of William and Mary Williamsburg, VA 23187-8795 LXRODM@WMVM1.Bitnet Helene Shapiro Department of Mathematics Swarthmore College 500 College Avenue Swarthmore, PA 19081-1397 hshapir1@cc.swarthmore.edu *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Bruce H. Krogh (krogh@ece.cmu.edu) The new IEEE Transactions on Control Systems Technology Manuscripts are solicited for the IEEE Transactions on Control Systems Technology, a new journal of the IEEE Control Systems Society to be published quarterly beginning March 1993. Scope The IEEE Transactions on Control Systems Technology will publish papers on new developments in all areas of control systems technology, including, but not limited to, new sensor and actuator technologies, software and hardware for real-time computing and signal processing in control systems, tools for computer-aided design of control systems, new approaches to control system design and implementation, experimental results, distributed architectures, intelligent control, and novel applications of control engineering methods. Survey and tutorial articles on timely topics of general interest will also be considered for publication. The Letters section provides for the rapid publication of brief reports on new research results and technical developments, and comments on previous papers. ASSOCIATE EDITORS X. Cao, Digital Equipment Corporation, USA D. Clarke, Oxford University, ENGLAND J. Cloutier, USAF Armament Lab, USA E. Collins, Harris Corporation, USA P. Dersin, GEC Alsthom, FRANCE B. Egardt, Goteborg University, SWEDEN S. Engell, Dortmund University, GERMANY (Co-Editor) H. Geering, ETH Zurich, SWITZERLAND E. King, ALCOA, USA S. Kumagai, Osaka University, JAPAN K. Lorell, Lockheed, USA J. Maciejowski, Cambridge University, ENGLAND R. Ravi, General Electric Co., USA D. Repperger, Wright Patterson AFB, USA M. Spong, University of Illinois-Urbana, USA M. Steinbuch, Philips Labs, THE NETHERLANDS G. Suski, Lawrence Livermore Labs, USA S. Williams, Cambridge Control Ltd., ENGLAND J. Winkelman, Ford Motor Co., USA N. Yoshitani, Naoharu, Nippon Steel Co. Ltd., JAPAN ADVISORY BOARD K. Astrom, Lund Institute of Technology, SWEDEN S. Kahne, MITRE Corporation, USA P. Kokotovic, University of California-Santa Barbara, USA M. Masten, Texas Instruments, USA G. Schmidt, Technical University of Munich, GERMANY L. Sweet, Asea Brown Boveri, USA T. Ueyama, Nippon Steel Co. JAPAN Information for Authors Three types of contributions will be considered: Papers, Brief Papers, and Letters. Papers and Brief Papers go through the same review process. Letters go through a shorter review process to facilitate rapid publication. Manuscripts must be double-spaced. The first page should include the title, the names and affiliations of all authors, an indication of the corresponding author, and a one-paragraph abstract which briefly describes the contribution of the paper. Papers should be no longer than 32 double-spaced pages, including figures. Brief Papers should be no longer than 16 double-spaced pages, including figures. Letters should be no longer than 8 double-spaced pages of text, plus figures. In general, manuscripts should follow the standards of the IEEE as described in Information for IEEE Transactions and Journal Authors, available on request from the IEEE Publications Department, 345 East 47th Street, New York, NY 10017-2394, USA. Seven copies of the complete manuscript with a cover letter stating the type of contribution (Paper, Brief Paper, or Letter) and the name and address of the corresponding author should be sent to one of the following editorial offices: Bruce H. Krogh, Editor IEEE Transactions on Control Systems Technology Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh, PA, 15213-3890 USA OR Sebastian Engell, Co-Editor IEEE Transactions on Control Systems Technology FB Chemietechnik University of Dortmund Postfach 50 05 00 D-4600 Dortmund 50 GERMANY Submissions should be sent to the editorial office which is most convenient to minimize time and cost of postage. Questions should be directed to Bruce H. Krogh at the above address, or computer mail: krogh@galley.ece.cmu.edu; phone: 412 268 2472; or fax: 412 268 3890. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Steve Kahne , Telex: Ireland, Dublin, 30690 Fax: Ireland, Dublin, (353.1) 7045222 Russia, Moscow, (095) 1350555 Telephones: (353.1) 7045223, (095) 1352490 Committee Chairman: Director of ICM: Academician Professor N.N.Krasovski V.I.Blagodatskikh *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: U. Helmke International Symposium on the Mathematical Theory of Networks and Systems MTNS 93 First Announcement and Call for Papers August 2-6, 1993, Regensburg, Germany Language The official language of the symposium is English. Preliminary Program The Preliminary Program will be mailed only to those from whom a reply has been received. Sponsors Gesellschaft fur Angewandte Mathematik und Mechanik (GAMM) University of Regensburg Others are under negotiations. Important Dates November 1, 1992 Deadline for submission of paper and proposals of special sessions. March 1, 1993 Notification of acceptance. April 1, 1993 One-page abstract is due August 2-6, 1993 Symposium August 6, 1993 Final version of the manuscript is due Symposium Chairmen U. Helmke, University of Regensburg, Regensburg R. Mennicken, University of Regensburg, Regensburg Purpose of Symposium The symposium offers theoretically oriented engineers and mathematicians in systems, control and circuit theory a platform to discuss recent developments, to exchange new ideas and to analyze trends for future research. It also provides them with an opportunity to establish and maintain contacts with colleagues. Topics of interest include mathematics for control, multivariable and robust control, systems modeling, systems identification, stochastic and adaptive control, optimal control, filtering, robotics, signal processing and circuit theory, VLSI, neural networks and control theoretic aspects of artificial intelligence. Scientific Program of the Symposium - Plenary lectures by invited speakers - Parallel lectures by invited speakers - Mini courses - Invited sessions on new developments - Contributed lectures on current research themes - Technical Exhibits - Book Exhibits Instructions for Authors of Full Papers Please submit three copies of an unpublished paper in the English language by November 1, 1992. The cover page of the paper should contain: title, author's name, affiliation and address, fax number, e-mail address, telephone number, an abstract and key words. In case of multiple authors the name of the first author mentioned will be used for all correspondence, unless stated otherwise. The length of the paper should not exceed 10 pages. All submitted papers will be examined by the Program Committee with the help of experts. Notification of acceptance will be given by March 1, 1993 and typing mats will be sent out to authors of full papers shortly afterwards. Authors of accepted papers must submit a one-page abstract by April 1, 1993, which will be included in the abstract book. The book of abstracts will be made available to participants of the symposium. Camera-ready versions of accepted papers are due on the last day of the symposium. Only accepted papers that have been presented at the symposium will be considered for publication in the proceedings. Instructions for Organizers of Special Sessions Please submit a proposal for a special session by November 1, 1992. A special session normally comprises 3 or 4 lectures of 25 minutes duration, but other arrangements are possible. The proposal should contain: the title of the session, name, affiliation and address of the organizer. Furthermore, it should contain the title of each lecture as well as the name, affiliation, address, fax number, e-mail address and telephone number of each speaker. In addition a one-page abstract for each lecture is needed. The subsequent processing of such a proposal is as for papers. To obtain Research Topics & Themes, Committee lists and other conference information, Contact: MTNS 93 U. Helmke Department of Mathematics University of Regensburg D-8400 Regensburg, Germany Fax Numbers: +49-941-943-4005/2305 e-mail: helmke@vax1.rz.uni-regensburg.dbp.de *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Aurel A. Lazar Columbia Workshop on Telecommunications Preliminary Call for Participation Broadband Networking: The State of the Art and Beyond September 21-22, 1992, New York Program Committee: Local Arrangements: Kai Eng, AT&T Bell Labs Paul V. Christianson, CTR Nim Cheung, Bellcore Giovanni Pacifici, CTR Richard Gitlin, AT&T Bell Labs Laurence Crutcher, CTR Inder Gopal, IBM T.J. Watson Aurel A. Lazar, Columbia Univ. Peter O`Reilly, GTE Labs Martin De Prycker, Alcatel Howard Shimokura, SWB Tatsuro Takahashi, NTT Significant research and development efforts are underway worldwide to promote the evolution of telecommunications into broadband services into the next decade. Many of these efforts are maturing to the point that serious migration plans can be discussed. Such migration plans imply an overall upgrade of the existing telecommunications infrastructure worldwide and also a sweeping deployment of a new generation of equipment covering both customer premises and the network. We believe that our workshop will be a timely forum for a discussion of this exciting technological evolution. Information about the format of the workshop: (i) it will take place in the auditorium of the new Shapiro Research Building on the Morning Side Campus of Columbia University at West 120th Street, between Amsterdam Avenue and Broadway. The auditorium offers approx. 200 seats; (ii) only invited contributions. Bound viewgraphs and/or position papers will be distributed to all participants. Keynote speaker: Alexander Fraser, Executive Director, AT&T Bell Laboratories; (iii) it will be organized around eight sessions. Every session will have at least one introductory speaker that will present the state of the art (tutorial in character) and will set the stage for the discussions to follow; (iv) the topics of the first day (four sessions) will be organized around Technologies for Broadband Infrastructure: switching, transmission, interfaces, hardware support for protocol processing, SONET, system architectures, electro-optics, WDM networks, passive lightwave architectures, components, photonic switching, etc.; (v) the topics of the second day will deal with network management, protocols and multimedia applications, software architectures and protocols, and QOS control, all for broadband networks. The workshop is sponsored by the Center for Telecommunications Research at Columbia University and AT&T Bell Laboratories. Send in a copy of this announcement with your registration fee ($100.00 before September 1st, $125.00 thereafter) to: Paul V. Christianson, Center for Telecommunications Research, 801 Shapiro Research Building, 530 West 120th Street, New York, NY 10027-6699. Registration applications will be processed on a FCFS basis. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: kraft@MASCHINENBAU.FH-MUENCHEN.DBP.DE ======================================= SECOND ANNOUNCEMENT AND ADVANCE PROGRAM --------- 9th IFAC WORKSHOP --------- CONTROL APPLICATIONS OF OPTIMIZATION ===================================== September 2-4, 1992, Munich Sponsored by IFAC-International Federation of Automatic Control Technical Committee on Mathematics of Control Working Group on Control Applications of Optimization Cosponsored by VDI/VDE (GMA) Gesellschaft fuer Mess- und Automatisierungstechnik Supported by Bayerisches Staatsministerium fuer Wirtschaft und Verkehr Deutscher Akademischer Austauschdienst Deutsche Forschungsgemeinschaft Bayerische Motorenwerke (BMW) Bayerische Vereinsbank International Buisiness Machines (IBM) Linde Verfahrenstechnik und Anlagenbau Mercedes-Benz Motorenwerke Augsburg-Nuernberg (MAN) Wacker Chemie Organized by FHM-Fachhochschule Muenchen Department of Mechanical Engineering Laboratory of Control and Automation For further INFORMATION and REGISTRATION contact: Dr. Dieter Kraft Fachhochschule Munich Dachauerstrasse 98 b D-8000 Munich 2 Federal Republic of Germany Tel. 0049 89 1265 1108 or 0049 8153 2493 Fax. 0049 89 1265 1392 e-Mail: kraft@maschinenbau.fh-muenchen.dbp.de Registration Fees: ----------------------------------------------------------------- | before August 10 | after August 10 | ----------------------------------------------------------------- Regular fee | DM 200 | DM 270 | Student fee | DM 50 | DM 70 | ----------------------------------------------------------------- Workshop Program Wednesday, September 2 09:00 - 10:30 G.0.01 (Invited Lectures) Gill, P.E.: Large-scale SQP-Methods and their Application in Trajectory Optimization. Chernousko, F.L.: Optimization in Control of Robots. 11:00 - 12:30 G.0.01 (SQP-Based Methods) Arnold, E., Puta, H.: A SQP-Type Solution Method for Constrained Discrete-Time Optimal Control Problems. Sargent, R.H.W., Gritsis, D.M., Pantelides, C.C.: An Algorithm for Computing Optimal Controls for Multistage Systems Described by Index-two Differential-Algebraic Equations. Schloeder, J.P.: Efficient Solution of Inverse Problems in DAE by BVP Methods. Steinbach, M.C.: Fast Structured SQP Methods for the Direct Solution of Optimal Control Problems. 14:00 - 15:30 G.0.01 (Robotic Control) Kiriazov, P.: A Direct Search Approach to Optimal Robot Control Synthesis. Landwehr, M., Lefarth, U., Waamuth, E.: Parameter Optimization of Nonlinear Dynamic Systems with Practical Applications to Mechatronic Systems. Schulz, V., Bock, H.G., Longman, R.W., Steinbach, M.C.: Numerical Path Planning for Satellite Mounted Robots. Stryk, O. von, Schlemmer, M.: Optimal Control of the Industrial Robot Manutec r3. 14:00 - 15:30 G.1.27 (Maximum Principle) Bibi, M.O.: Support Method for Solving a Linear-Quadratic Problem with Polyhedral Constraints on Control. Dikusar, V.V.: Boundary Value Problem in Optimal Control with General Constraints. Dmitruk, A.V.: Second Order Optimality Conditions for Singular Regimes. Dykhta, V.A., Bockmelder, E.P., Derenko, N.V.: Variational Maximum Principle for Impulsive Processes and Applications. 16:00 - 17:30 G.0.01 (Power Systems) Ericsson, G., Forsgren, P., Gyllenswaerd, E.: An Object-Oriented Approach to Optimally Describe and Specify a Scada System Applied to a Power Network. Guo, S.X., Momoh, J.A.: The Homotopy Continuation Method to Approach Voltage Collapse of Electrical Power Systems. Schindler, Z.: Steady-State Modelling of a Turbine Engine with Controller. Momoh, J.A., Guo, S.X., Adapa, R., Ogbuobiri, E.C.: Nonlinear Power System Optimization Problems using the Quadratic Interior Point Method. 16:00 - 17:30 G.1.27 (Feedback Systems) Gabasov, R., Balashevich, N.V., Kirillova, F.M.: Synthesis of Adaptive Optimal Controls for Linear Dynamic Systems. Schmid, A.: Optimal Feedback Control for Systems with Varying Order. Schumann, L.M., Geering, H.P.: On the Realization of Optimal Feedback Controllers. Xue-Dong, Gao: Open-Loop and Closed-Loop Control for Dynamical Systems with Non-Linear Input. Thursday, September 3 09:00 - 10:30 G.0.01 (Invited Lectures) Clarke, F.H.: A Survey on Nonsmooth Analysis and its Applications. Betts, J.T.: Issues in the Direct Transcription of Optimal Control Problems to Sparse Nonlinear Programs. 11:00 - 12:30 G.0.01 (Aerospace Systems) Callies, R.: A Robot Satellite with Simplified Design. Jaermark, B., Bengtsson, H.: Near-Optimal Flight Trajectories Generated by Neural Networks. Kugelmann, B.: Performance of a Feedback Scheme with Respect to Changes in the Air Density during the Ascent of a TSTO-Vehicle. Roenneke, A.J., Well, K.H.: Reentry Control of a Low-Lift Maneuverable Capsule. 11:00 - 12:30 G.1.27 (Nonsmooth Systems) Galperin, E.A.: Nonscalarized Multiobjective Global Optimization. Heinkenschloss, M.: Numerical Solution of Semilinear Parabolic Control Problems. Kazi-Tani, L., Ghouali, N.: On-line Optimization: Admissibility of Real Constraints. Outrata, J., Zowe, J.: A Nondifferentiable Approach to the Optimal Control of Economic Equilibria. 14:00 - 15:30 G.0.01 (Minisymposium: AnDeCS -- A Coherent Technology) Gruebel, G.: A Coherent Technology for Optimization-Based Control System Design. Joos, D.: Multi-Objective Control System Design. Gramlich, G.M.: The Optimization Loop in Multi-Objective Control Design. Finsterwalder, R.: Visual Decision Support in a Multi-Objective Control-Engineering Design Environment. Lewald, S.: TOMOPS: Multi-Objective Robot-Trajectory Optimization. Friday, September 4 09:00 - 10:30 G.0.01 (Invited Lectures) Sachs, E.: Newton-Type Methods for Optimal Control. Pesch, J.: Solving Optimal Control Problems of High Complexity. 11:00 - 12:30 G.0.01 (Mechanical Systems) Bourdache-Siguerdidjane, H., Pesch, J.: Optimal Noninteracting Control of an Overhead Crane with Constraints and Hoisting of the Load. Claude, D., Nadjar, N.: Nonlinear Control under Constraints of a Biological System. Kolmanosvkii, V.B., Koroleva, N.I.: On the Optimal Control of some Nonlinear Ecological Systems. Schenker, W.: Symmetries and Time Optimal Control of Mechanical Systems. 11:00 - 12:30 G.1.27 (Games and Uncertainty) Botkin, N.D., Kein, V.M., Patsko, V.S., Turova, V.L., Zarkh, M.A.: Numerical Methods for Solving Differential Games. Prospective Applications to Technical Problems. Malinowski, K.: Repetitive Optimization for Predictive Control of Dynamic Systems under Uncertainty. Melikyan, A.A.: Optimal Path Planning for Dynamic Systems with Goal Point Uncertainty. Sonnevend, G.: Constructive Feedback Control in Differential Games by use of Central Trajectories. 14:00 - 15:00 G.0.01 (Semi-Symbolic Algorithms) Bestle, D., Eberhard, P.: Automated Approach for Optimizing Dynamic Systems. Mehlhorn, R., Dinkelmann, M., Sachs, G.: Application of Automatic Differentiation to Optimal Control Problems. Schoepf, R., Deuflhard, P.: OCCAL -- A Mixed Symbolic-Numeric Optimal Control Calculator. 14:00 - 15:00 G.1.27 (Engineering Applications) Ardema, M.D., Chou, H.-C.: Second Order Algorithm for Time Optimal Control of a Linear System. Breitner, M.H.: Construction of the Optimal Feedback-Controller for Constrained Optimal Control Problems with Unknown Disturbances. Ng, W.-Y.: A Three-Level Strategy for Search-Based Control System Design. 15:30 - 16:30 G.0.01 (Round Table Discusion) Industrial Representatives, Members of the IPC, Invited Speakers: Transferring Optimal Control to Industrial Environments. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Ashok Iyer (iyer@unlv.edu) CALL FOR PAPERS NINTH INTERNATIONAL CONFERENCE ON SYSTEMS ENGINEERING UNIVERSITY OF NEVADA, LAS VEGAS 14-16 July 1993 This series of International Conferences is jointly organized on a rotational basis among the three Institutions, University of Nevada, Las Vegas, USA the Technical University of Wroclaw, Poland and Coventry University, UK. The 9th International Conference on Systems Engineering takes place at the Howard R. Hughes College of Engineering, University of Nevada, Las Vegas on July 14-16, 1993. Scope of Conference The Conference will cover the general area of Systems Engineering, with particular emphasis being placed on applications. It is expected to include sessions on the following themes. Avionics Robotics and Industrial Automation Information Theory and Communication Systems Expert Systems and Artificial Intelligence Control Theory, System Identification and Adaptive Control, Nonlinear Control Environmental Systems and Energy Systems Neural Network and Applications Engineered Systems for Nuclear Waste Management Signal Processing Computer Algorithms, Databases, Networks, Parallel and Distributed Systems Global Position Systems Geographic Information Systems Call For Papers Authors wishing to contribute to the conference should send an abstract (6 copies) of their proposed contribution (approximately 450 words) before December 1, 1992. The abstract should be typed (double spaced) and written in English. Refereeing of abstracts submitted before the deadline date will take place on a regular basis. This will allow early decisions to be taken and should assist authors in their projected planning arrangements. Call for Invited Sessions The Program Committee is also soliciting proposals for invited sessions before November 1, 1992. Proposals should be submitted to the conference secretary. Proposals should contain a complete list of the authors, their addresses, titles and one page abstracts of the paper, session title, and names and addresses of the chairperson and the co-chairperson. The organizer should also attach a cover letter describing the main theme of the proposed session. Deadlines Submission of Invited Sessions Nov. 1, 1992 Submission of Abstracts Dec. 1, 1992 Acceptance of papers Jan. 1, 1993 Submission of full papers Feb. 1, 1993 It is intended to have the Conference Proceedings available for participants. Consequently, deadlines for submission of papers should be strictly respected. Program Committee Prof. A. V. Balakrishnan, University of California, Los Angeles, USA Prof. Z. Bubnicki, Technical University of Wroclaw, Poland Prof. W. N. Burkov, Soviet Academy of Sciences, Russia Prof. G. Guardabassi, Politecnico di Milano, Italy Mr. J. Holcombe, Nevada Power Company, USA Prof. L. Hsu, Universidade Federal do Rio de Janeiro, Brazil Prof. D. J. G. James, Coventry Polytechnic, UK Prof. G. Leininger, Univ. of Missouri-Rolla, USA Prof. R. R. Mohler, Oregon State University, USA Dr. J. Taranik, Desert Research Institute, USA Prof. M. Thoma, Universitat Hanover, Germany Prof. P. Vidal, Univ. des Sciences et Techniques de Lille, France Prof. W. R. Wells, University of Nevada, USA Organizing Committee Prof. William Wells (Chairman), UNLV Prof. Ashok Iyer (Conference Secretary), UNLV Prof. Sahjendra Singh, UNLV Prof. William Brogan, UNLV Prof. Ajoy Kumar Datta, UNLV Dr. Muhilan Pandian, HRCES, UNLV Prof. Carl G. Looney, Univ. of Nevada, Reno Dr. Homayoun Seraji, Jet Propulsion Laboratories All papers are considered for publication in the Journal Systems Science, published in Poland (in English). University of Nevada, Las Vegas HRH College of Engineering Las Vegas, NV 89154 Preliminary Arrangements Conference fees, provisionally estimated at $250, include a copy of the Conference Proceedings, the Conference Banquet, a Civic Reception and lunch on the three conference days. Participants will have the option of being accommodated in the University dormitories at a nominal fee. The Conference fee is exclusive of accommodation charges. The working language of the Conference is English, which will be used for all presentations, discussions and printed material. A full social program for accompanying persons will be organized providing sufficient numbers are interested in participating. Abstracts and requests for further details should be sent to: Conference Secretary / ICSE '93 Howard R. Hughes College of Engineering University of Nevada, Las Vegas Las Vegas, NV 89154 Phone: (702) 739 3699 FAX: (702) 739 0962 Email: iyer@ee.unlv.edu *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Petr Kozak kozak@cspgas11.bitnet SECOND ANNOUNCEMENT & PRELIMINARY PROGRAM ------------------------------------ >>> JOINT WORKSHOP ON DISCRETE EVENT SYSTEMS <<< August 26-28, 1992, Prague, Czechoslovakia WODES'92 ORGANIZED BY During the workshop, urgent messages can be telephoned to +(42) (2) 84 71 73 and +(42) (2) 815 2806 or faxed to +(42) (2) 847 452. The workshop will take place at the Institute of Information Theory and Automation, Czechoslovak Academy of Sciences, Prague. The workshop will be a working meeting on discrete event systems. It will include three types of presentations: invited survey lectures, contributed papers, and workshop exercises. The presentations will be both general and self--contained in order to be understood by participants without any prior deep interest in this research area. TOPICS Modeling and control of discrete event systems at all levels, i.e. at the logical and temporal levels including also stochastic aspects. Issues in identification, verification, and scheduling. Contributions on applications. PLENARY LECTURES Five invited survey lectures will cover the fundamental methods of discrete event systems modeling, control, and verification. The lectures will be given by: Prof. C.G. Cassandras, University of Massachusetts, Amherst, U.S.A. Prof. K.M. Inan, Middle East Technical University, Ankara, Turkey Prof. S.I. Marcus, University of Maryland, College Park, U.S.A. Prof. G.J. Olsder, Delft University of Technology, The Netherlands Prof. P.J. Ramadge, Princeton University, U.S.A. WORKSHOP PROGRAM ----------------- Tuesday, August 25 -------------------------------- 16.00 - 20.00 Registration and Informal Meeting at the Institute ----------------- Wednesday, August 26 ------------------------------ 8.00 Registration 9.00 Opening Session 9.30 Invited Lecture: S.L. Chung {1}, S. Lafortune {1} and F. Lin$ {2}, {1} University of Michigan, Ann Arbor, and {2} Wayne State University, Detroit, U.S.A. 15.40 A Minimally Restrictive Policy for Deadlock Avoidance in a Class of FMS, Y. Brave and D. Bonvin, EPFL, Lausanne, Switzerland 16.00 COFFEE BREAK 16.30 Control of Discrete Event Systems by means of the Boolean Differential Calculus, R. Scheuring and H. Wehlan, Universitat Stuttgart, Stuttgart, Germany 16.50 Maximally Permissive Feedback Controls for Controlled State Machines, V. Van Breusegem {1}, L. Ben-Naoum {1}, and R.K. Boel {2}, {1} Universite Catholique de Louvain, Louvain-la-Neuve, and {2} University of Gent, Gent, Belgium 17.10 On Markovian Fragments of COCOLOG for Logic Control Systems, Y.J. Wei and P.E. Caines, McGill University, Montreal, Canada {2} Wayne State University, Detroit, U.S.A. 9.45 Supervisory Control for the Cat and Mouse Problem using Finitely Recursive Processes, M.P. Spathopoulos and M.A. de Ridder, University of Strathclyde, Glasgow, Great Britain 10.00 COFFEE BREAK 10.30 The Cat-and-Mouse Problem with Least Delays, P. Kozak, Czechoslovak Academy of Sciences, Prague, Czechoslovakia 10.45 Cat and Mouse in a Maze: Extended Formulations and Their Solutions Using Controlled Markov Chains, K. Sladky, Czechoslovak Academy of Sciences, Prague, Czechoslovakia 11.00 The Cat-and-Mouse Problem as a System of Boolean Equations, O. Kriz, Czechoslovak Academy of Sciences, Prague, Czechoslovakia 11.15 Symbolic Supervisory Synthesis for the Workshop Exercise, H. Wong-Toi and G. Hoffmann, Stanford University, Stanford, U.S.A. 11.40 LUNCH 14.00 Invited Lecture: Synchronized Continuous Flow Systems G.J. Olsder, Delft University of Technology, Delft, The Netherlands Time Models of Discrete Event Systems 15.00 A Unifying Framework for Discrete Event System Control Theory, P. Kozak, Czechoslovak Academy of Sciences, Prague, Czechoslovakia 15.20 Control of Infinite Behavior of Real-Time Discrete Event Systems, G. Hoffmann and H. Wong-Toi, Stanford University, Stanford, U.S.A. 16.00 Social Program: Sightseeing Tour 19.00 Social Program: Workshop Dinner ----------------- Friday, August 28 --------------------------------- Mini-Max Algebra 8.30 On a Generalized Asymptoticity Problem in Max Algebra, J.G. Braker {1} and J.A.C. Resing {2}, {1} Delft University of Technology, Delft, and {2} Eindhoven University of Technology, Eindhoven, The Netherlands 8.50 Combinatorial Aspect of Minimal Realization of Discrete Event Dynamic System, L. Wang {1}, X. Xinhe {1}, P. Butkovic {2}, and R.A. Cuninghame-Green {2}, {1} Northeast University of Technology, Shenyang, China, and {2} University of Birmingham, Great Britain 9.10 A Petri Net Based Optimal Controller Synthesizer, H.A. Barker {1} and J. Song {2}, {1} University College of Swansea, Singleton Park, and {2} University of York, York, Great Britain 9.30 COFFEE BREAK 10.00 Invited Lecture: Perturbation Analysis and ``Rapid Learning'' for Discrete Event Systems: an Overview and a Case Study, Ch.G. Cassandras, University of Massachusetts, Amherst, U.S.A. Perturbation Analysis 11.00 Conditions for Tracking Timing Perturbations in Timed Petri Nets with Monitors, K.J. Williams, J.A. Gannon, M.S. Andersland, J.E. Lumpp, and T.L. Casavant, University of Iowa, U.S.A. 11.20 Parameter Path Perturbation Analysis, 16.50 An Object-Oriented Simulator for Traffic Systems, T. Riedel and U.A. Brunner, Swiss Federal Inst. of Technology, Zurich, Switzerland 17.15 Closing Session For information on registration, accommodations, travel arrangements, etc, contact the organizers (kozak@cspgas11.bitnet). *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: khorrami@puee1.poly.edu (Farshad Khorrami) PROGRAM ANNOUNCEMENT FOR IEEE REGIONAL CONTROL CONFERENCE JULY 24-25, 1992 POLYTECHNIC UNIVERSITY BROOKLYN, NY The following is the program for the IEEE Regional Control Conference to be held at Polytechnic University, Brooklyn, NY on July 24-25, 1992. FRIDAY SCHEDULE (July 24) 8:30-9:00 Reception 9:00-10:00 Plenary Speaker, Dr. R. H. Taylor, T. J. Watson Research Center, IBM Yorktown Heights, NY Medical Robotics: A Step Toward Computer Integrated Medicine 10:00-10:20 Break SESSION 1: Linear Systems and Identification -------------------------------------------- 10:20-10:50 H-P Lee and J. J. Bongiorno, Polytechnic University, Brooklyn, NY Wiener-Hopf Design of Optimal Decoupling Controllers for Plants with Nonsquare Transfer Matrices 10:50-11:15 R. F. Stengel and C. I. Marrison, Princeton University, Princeton, NJ Gain and Phase Margins as Indicators of Robustness 11:15-11:40 P. J. Campo and R. Ravi, GE Corporate Research and Development, Schenectady, New York Control Structure Selection for Non-Square Plants 11:40-12:05 T. N. Chang and S. Mallepalle, New Jersey Institute of Technology Newark, New Jersey On the Control of General Proper Systems 12:05-12:30 S. U. Pillai and T. I. Shim, Polytechnic University, Brooklyn, New York Rational Modeling of Distributed Systems 12:30-2:00 LUNCH AND LAB TOURS SESSION 2: Control/Structure Interaction ---------------------------------------- 2:00-2:25 F. Austin, G. Knowles, W. G. Juang, C. C. Tung, E. M. Sheedy Grumman Corporate Research Center, Bethpage, NY Adaptive/Conformal Wing Design for Future Aircraft 2:25-2:50 F. Pourki, Drexel University, Philadelphia, PA Shape Control of Variable Geometry Strcutures 2:50-3:15 F. Khorrami and E. Tome, Polytechnic University, Brooklyn, NY Active Control of Flexible Structures with Embedded Piezoceramics' 3:15-3:40 W. Grossman, Space Sciences Corporation, White Plains, NY A Momentum Management Technique for the Control of Satellites with Microgravity Acceleration Constraints SESSION 3: Linear Systems ------------------------- 2:00-2:25 V. Skorodinsky, Rego Park, New York Stability Criteria of Control Systems in the Form of Numerical Procedures 2:25-2:50 C. Tsui, CUNY College of Stanten Island, Staten Island, New York A Predictive Control Law for Tracking 2:50-3:15 M. T. Lim, Rutgers, The State University of New Jersey, Piscataway, New Jersey System Order Reduction Via Routh Cannonical Transformation 3:15-3:40 A. Borno, Rutgers, The State University of New Jersey, Piscataway, New Jersey On the Open-Loop Optimal Control of Discrete Linear Systems With a Quadratic Performance Index 3:40-4:00 BREAK SESSION 4: Robotics and Nonlinear Control ----------------------------------------- 4:00-4:25 L. R. Zai, J. P. Karidis, D. G. Manzer, and L. F. Durfee IBM Research, T. J. Watson Research Center, Yorktown Heights, NY Control of a High-Speed 3-DOF Hummingbird Minipositioner with a Multi-Transputer MARC Controller 4:25-4:50 N. Chow, Columbia University, Dobbs Ferry, NY and J. Ish-Shalom, IBM Watson Research Center, Yorktown Heights, NY Demonstration of a Robot Assembly Task Using Only Position Sensors 4:50-5:15 J. Rastegar, State University of New York at Stony Brook, Stony Brook, New York A Trajectory Pattern Based Parameter Uncertainty Compensation Scheme 5:15-5:40 L. Gurvits, Siemens Corporate Research, Princeton, NJ Skew Symmetric Systems and Nonholonomic Motion Planning SESSION 5: Biomedical Application --------------------------------- 4:00-4:25 A. U. Meyer, New Jersey Institute of Technology, E. J. Hampt, Montclair State College, J. J. Castro, AT&T Bell Laboratories, NJ, and H-Z Pan, NYU Medical Center, New York Modleing and Parameter Identification in Clinical Electrophysiology of the Eye 4:25-4:50 V. Zemon, Rockefeller University, New York, E. Pinkhasor, University of Medicine and Dentistry of New Jersey, and J. Gordon, Hunter College of City University New York Models of Human Binocular Vision Assessed Neurophysiologically and Psychophysically 4:50-5:15 S. W. Jaslove, The Rockefeller University, New York, NY A Compartmental Modeling Approach to the Analysis of Neuronal Circuits SESSION 6: Decentralized Control -------------------------------- 5:15-5:40 T. Chang, New Jersey Institute of Technology, Newark, New Jersey Optimal Decentralized Structure for the Stabilization of Industrial Processes" 5:40-6:05 M. T. Qureshi, Rutgers, The State University of New Jersey Piscataway, New Jersey Boundary Value Problem of Discrete Linear Weakly Coupled Systems Saturday (July 25) ------------------ 9:30-10:00 Reception SESSION 7: Applications ----------------------- 10:00-10:25 J. Murray, State University of New York at Stony Brook, Stony Brook, New York A Differential-Delay Control for Ramped Magnet Current 10:25-10:50 R. C. Ezzo, GPU Nuclear Corporation and B. Friedland, New Jersey Institute of Technology, Newark, New Jersey An Advanced Control Algorithm for a Nuclear Power Plant Feedwater Control System 10:50-11:15 D. Dozor and N. Hemati, Drexel University, Philadelphia, PA An H_{infinity} Approach to the Current Control of Brushless DC Motors 11:15-11:40 W. Yu, J. E. Piou, and K. M. Sobel, The City College of New York, New York, NY An Application of Robust Control to the EMRAAT Missile 11:40-12:05 S. Seereeram and J. T. Wen, Ransselaer Polytechnic Institute, Troy, NY Global Path Planning for Redundant Manipulators 12:30-2:00 LUNCH AND LAB TOURS SESSION 8: Neural Networks Application -------------------------------------- 2:00-2:25 R. W. Longman, Columbia University, New York, M. Phan, Lockheed, Hampton, VA, and J-N Juang, NASA Langley Research Center, Hampton, VA An Overview of a Sequence of Research Developments in Learning and Repetitive Control 2:25-2:50 N. Chbat, C. J. Li, and J. Ish-Shalom, Columbia University, NY, NY Gradient-Free Learning of a hierarchically controlled Robot 2:50-3:15 A. Tzes and P. Y. Peng, Polytechnic University, Brooklyn, NY Application of Neural Network Control for DC motor Stiction Compensation 3:15-3:40 K. Wendy, State University of New York, Stony Brook, NY Intelligent Robot Control with Neural Networks SESSION 9: Disceret-Event Systems and Networks ---------------------------------------------- 2:00-2:25 H. Wong and M. C. Zhou, New Jersey Institute of Technology, Newark, New Jersey Automated Generation of Modified Reachability Tree for Petri Nets 2:25-2:50 F. R. Stolfi, Webster Research Center, Xerox Corporation, North Tarry Town, NY Discrete Event Simulation and Control of a Just-in-Time Manufacturing Cell 2:50-3:15 L. Tassiulas, Polytechnic University, Brooklyn, NY On Distributed Scheduling with Non-Zero Switchover Times 3:15-3:40 M. C. Zhou and Z. Pan, New Jersey Institute of Technology, Newark, New Jersey A Petri Net Method for Modeling and Performance of Token Bus Local Area Networks 3:40-4:00 BREAK SESSION 10: Kalman Filtering --------------------------- 4:00-4:25 J. Boka, GE Astro Space, PA, and Z. Gajic Rutgers, The State University of New Jersey, Piscataway, New Jersey Kalman Filtering Error Due to Inaccuracy in Filter Initial Condition 4:25-4:50 W. Grossman, Space Sciences Corporation, White Plains, NY 10604 Bias and Divergence in Bearings-Only Extended Kalman Filters 4:50-5:15 C. Tsui, CUNY College of Stanten Island, Stanten Island, New York Unifying State Feedback/LTR Observer and Constant Output Feedback Design by Dynamic Output Feedback 5:15-5:40 A. Kolarov and J. Y. Hui, Rutgers, The State University of New Jersey Piscataway, New Jersey Modeling and Kalman Type Prediction of Traffic Fluctuations in Multiple-Service Networks SESSION 11: Stability -------------------------- 4:00-4:25 A. Levin, Brooklyn, New York Method of Decomposition in the Theory of Stability of Multi-Plant Controlled Systems (MCS) 4:25-4:50 L. Gurvits, Siemens Corporate Research, Princeton, NJ How to Check Absolute Stability of Linear Discrete Systems? 4:50-5:15 C. Tsui, CUNY College of Staten Island, Staten Island, New York A New Robust Stability Measure for State Feedback Systems 5:15-5:40 A. Levin, Brooklyn, New York Decomposition-Based Lyapunov Stability Criterion for Multi-Component Nonlinear Systems With a Common Link *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: ismis93@idt.unit.no (Jan Komorowski) SEVENTH INTERNATIONAL SYMPOSIUM ON METHODOLOGIES FOR INTELLIGENT SYSTEMS Trondheim, Norway, June 15-18, 1993 SPONSORS: Univ. of Trondheim (Norway), UNC-Charlotte (USA), Oak Ridge National Laboratory (USA). PURPOSE OF THE SYMPOSIUM This Symposium is intended to attract individuals who are actively engaged both in theoretical and practical aspects of intelligent systems. The goal is to provide a platform for a useful exchange between theoreticians and practitioners, and to foster the cross-fertilization of ideas in the following areas: * Approximate Reasoning * Expert Systems * Intelligent Databases * Knowledge Representation * Learning and Adaptive Systems * Logic for Artificial Intelligence. In addition, we solicit papers dealing with Decision Making and Automatic Control. Papers presented at the symposium must describe work that has not previously been published or presented at a conference. ISMIS'93 Symposium Chairs: Jan Komorowski (Norway) and Zbigniew W. Ras (USA) ISMIS'93 PROGRAM COMMITTEE: Jens Balchen (Trondheim, Norway) Alan Biermann (Duke) Alan Bundy (Edinburgh, Scotland) Jacques Calmet (Karlsruhe, Germany) Jaime Carbonell (CMU) David W. Hislop (US Army Research Office) Eero Hyvonen (VTT, Finland) Marek Karpinski (Bonn, Germany) Yves Kodratoff (Paris VI, France) Kurt Konolige (SRI) Catherine Lassez (IBM-Yorktown Heights) Lennart Ljung (Linkoping, Sweden) Ramon Lopez de Mantaras (Barcelona, Spain) Alberto Martelli (Torino, Italy) Ryszard Michalski (George Mason) Jack Minker (Maryland) Rohit Parikh (CUNY) Judea Pearl (UCLA) Don Perlis (Maryland) Francois G. Pin (ORNL) Henri Prade (Toulouse, France) Barry Richards (Imperial College, UK) Colette Rolland (Paris I, France) Lorenza Saitta (Torino, Italy) Erik Sandewall (Linkoping, Sweden) Rich Thomason (Pittsburgh) Enn Tyugu (Stockholm, Sweden) Ralph Wachter (Office of Naval Research) S.K. Michael Wong (Regina, Canada) Erling Woods (Trondheim, Norway) Maria Zemankova (NSF) Jan M. Zytkow (Wichita State) SUBMISSION AND INFORMATION Authors are invited to submit four copies of their manuscript (no longer than 20 pages) to the co-chair: Zbigniew W. Ras, ISMIS'93 Univ. of North Carolina Dept. of Computer Science Charlotte, N.C. 28223, USA e-mail: ras@mosaic.uncc.edu Submissions should include a return postal address and an electronic mail address (if available). INFORMATION For further information please contact: ISMIS'93 Local Committee Univ. of Trondheim/NTH Dept. of Comp. Science and Electr. Eng. N-7034 Trondheim, Norway e-mail: ismis93@idt.unit.no fax: +47 7 594466 DEADLINES: November 1, 1992 -- Paper submission January 15, 1993 -- Notification of acceptance February 25, 1993 -- Camera-ready version *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by : Raymond Hanus MIM-S^2 '93 Call for Papers IMACS Second International Symposium on: MATHEMATICAL and INTELLIGENT MODELS in SYSTEM SIMULATION APRIL 12 - 16, 1993 BRUSSELS, BELGIUM Organized by IMACS Technical Committee on Control Systems and Robotics Sponsored by IBRA-BIRA Federation Co-sponsorship by IFAC has been requested International Program Committee M. AUBRUN I.N.P.L. - Nancy - FRANCE J. BABARY L.A.A.S. - Toulouse - FRANCE S. BANKS Univ. of Sheffield - ENGLAND P. BORNE E.C.L. - Lille - FRANCE F. CANAL U.P.C. - Barcelona - SPAIN B. de FORNEL I.N.P.T. - Toulouse - FRANCE I. DUMITRACHE Polytech. Inst. of Bucharest - ROMANIA P. FRANK Univ. of Duisburg - GERMANY T. FUKUDA Univ. of Nagoya - JAPAN T. FUTAGAMI Tech. Inst. of Hiroshima - JAPAN P. GASPART U.L.B. - Brussels - BELGIUM R. GOREZ U.C.L. - Louvain-la-Neuve - BELGIUM R. HANUS U.L.B. - Brussels - BELGIUM R. ISERMANN Univ. of Darmstadt - GERMANY R. KARBA Univ. of Ljubljana - SLOVENIA L. KEVICZLY M.T.A. - Budapest - HUNGARY M. KINNAERT U.L.B. - Brussels - BELGIUM P. KOOL V.U.B. - Brussels - BELGIUM J. KUREK Tech. Univ. of Warsaw - POLAND A. MEYSTEL Univ. of Drexel - UNITED STATES E. MOSCA Univ. of Florence - ITALY H. NOUR ELDIN Univ. of Wuppertal - GERMANY R. PATTON Univ. of York - ENGLAND G. PEREZ Univ. of Valencia - SPAIN J. RAGOT I.N.P.L. - Nancy - FRANCE A. RAZEK E.S.E. - Paris - FRANCE M. REMY Polytech. Fac. of Mons - BELGIUM T. SALOKY Tech. Univ. of Preov - CZECHOSLOVAKIA G. SCHMIDT Tech. Univ. of Munich - GERMANY M. SILVA Univ. of Zaragoza - SPAIN M. SINGH U.M.I.S.T. - Manchester - ENGLAND S. STRMNIK Inst. Joef Stefan - Ljubljana - SLOVENIA Y. SUNAHARA Univ. of Okayama - JAPAN A. SYDOW G.M.D.-F.I.R.S.T - Berlin - GERMANY A. TITLI L.A.A.S. - Toulouse - FRANCE I. TROCH Tech. Univ. of Vienna - AUSTRIA S. TZAFESTAS (Chairman) N.T.U.A. - Athens - GREECE J. VAN ECK U.L.B. - Brussels - BELGIUM A. van CAUWENBERGHE R.U.G. - Ghent - BELGIUM H. VERBRUGGEN Tech. Univ of Delft - THE NETHERLANDS M. VUKOBRATOVICH Mihailo Pupin Inst. - Beograd - YUGOSLAVIA D. ZAPRIANOV C.L.C.S. - Sofia - BULGARIA Local Organizing Committee P. GASPART U.L.B. - Brussels - BELGIUM R. GOREZ U.C.L. - Louvain-la-Neuve - BELGIUM R. HANUS (Chairman) U.L.B. - Brussels - BELGIUM M. KINNAERT U.L.B. - Brussels - BELGIUM P. KOOL V.U.B. - Brussels - BELGIUM J. VAN ECK U.L.B. - Brussels - BELGIUM Scope The symposium aims to provide a forum for presentation and discussion of recent advances of System Modelling and Simulation in different disciplines with emphas on the coupling of mathematical and intelligent techniques. Topics Mathematical Models * Dynamic and stochastic models * Simulation methodologies * Estimation and sensitivity models * Neural network models * Decision making models * Fault detection models * Discrete event dynamic systems and Petri nets * Fuzzy models * Distributed parameter systems Intelligent Models * AI models and languages * Genetic algorithms and cellular automata * Symbolic computation models * Knowledge based models * Expert system tools * Machine intelligence models * Reasoning models under uncertainty * Knowledge control models * Intelligent control models * Hybrid numeric and symbolic models Applications * Computer and control systems * Robotic and manufacturing systems * Energy and power systems * Electrical drives * Electronic and communication systems * Medical and bioengineering systems * Biotechnological systems * Management and economic systems * Chemical and industrial systems * Aerospace systems * Environment Submission and Selection of Papers People wishing to present a paper should send an abstract (300-500 words) in two copies to the Secretariat of the Symposium: MIM-S^2 '93 Lab. d'Automatique CP.165 - U.L.B. av. F.D. Roosevelt 50 B-1050 Brussels Deadline for submission of abstracts is: October 15, 1992 Preliminary acceptance of the papers will be based on the submitted abstracts wh must clearly state the originality and importance of the results. Notification o acceptance and author's kit will be mailed by: December 15, 1992 Only previously unpublished papers will be accepted for presentation at the symposium. IMACS holds the copyright for the publication of the papers in the final proceedings. Full papers typed in camera ready form must be submitted by February 28, 1993 The organizers reserve themselves the right not to accept low quality papers. Authors will be informed of the final decision by March 30, 1993. Preprints of accepted papers will be distributed to all registered participants upon arrival. Proceedings will be published by an international publishing company selected by IMACS. Authors may be requested to provide improved manuscripts for the proceedings. General Information Venue The symposium will be held in Brussels at PALACE HOTEL rue Gineste, 3 B-1210 BRUSSELS (Underground station "Rogier", city railway station "Gare du Nord") Conference language The symposium language will be English. Participation fee IMACS members (before January 30, 1993) : BEF 17,000 Non-members (before January 30, 1993) : BEF 18,000 Students (before January 30, 1993) : BEF 5,000 IMACS members (after February 1, 1993) : BEF 19,000 Non-members (after February 1, 1993) : BEF 20,000 Students (after February 1, 1993) : BEF 6,000 It includes - access to lectures and book exhibition* - receipt of a congress cover containing the Preprints and other information - daily lunch - participation to conference reception* - participation to conference banquet * Only the items marked with an asterisk are included in the student's fee. Social events A mini-trip in one of the Europe's loveliest cities, romantic open-air museum of churches, elegant houses, famous canals and internal ports, the "Beautiful Bruge will be organized on Wednesday, April 14, 1993, for participants and accompanyin persons. Accommodation A block of rooms has been reserved at the Palace Hotel at the special rate of BEF 3,600 a night per room (single occupancy) and BEF 4,200 a night per room (double occupancy) for conference participants and accompanying persons. Registration for participation and accommodation Complete the enclosed registration cards for participation and accommodation and send them to the organizers preferably no later than January 30, 1993 Your registration is binding and will not be separately confirmed. However, a confirmation slip will be sent if it is explicitely requested on the registratio Members of the Organizing Committee and lecturers are also invited to register f participation and accommodation. Hotelrooms will be allocated at the organizers desk during opening hours. Rooms are available for use from 2 p.m. on the day of arrival. About IMACS IMACS is an International Association of professionals and scientists concerned with computers, computation and applied mathematics, in particular as they apply to the simulation of systems. This includes numerical analysis mathematical modelling, approximation theory, computer hardware and software, programming languages and compilers. IMACS also concerns itself with the general philosophy scientific computation and applied mathematics, and with their impact on society on disciplinary and interdisciplinary research. IMACS is one of the five International Scientific Associations with (IFAC, IFORS IFIP and IMEKO) represented in FIACC, the five international organizations in th area of computers, automation, instrumentation and the relevant branches of appl mathematics. Of the five, IMACS (which changed its name from AICA in 1976) is the oldest, having been founded in 1956. Information and Correspondence Secretariat of the MIM-S^2 '93 Symposium c/o Labo. d'Automatique CP.165 - U.L.B. av. F.D. Roosevelt, 50 B-1050 Brussels Phone : 32.2.650.2613 Fax : 32.2.650.2677 Telex : 23069.unilib.b E-mail : imacs@ulb.ac.be *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** End of Eletter No. 52, Part 2, July 1992. E-LETTER on Systems, Control, and Signal Processing ISSUE No. 52, PART 1, 15 July 1992 Editors: Bradley W. Dickinson bradley@princeton.edu or bradley@pucc.bitnet Eduardo D. Sontag sontag@hilbert.rutgers.edu or sontag@pisces.bitnet *** To watch for in this issue: an article on fuzzy control and SCAD database update in Part 3, and several conference programs in Part 2 *** Welcome. We remind you that items for posting can be emailed to either of the editors. PLEASE SEND CONTRIBUTIONS, since the eletter can only be useful if everyone participates. A REQUEST: It would be useful if articles are already sent in the format that we use, starting with a "Contributed by:..." and a title centered in the next line. In addition, please provide a 60-character title for the Contents. Thanks! NOTE: if you are using an editor to read this mailing and if at any point you wish to skip to the next article, you can accomplish this by searching for the string: *.** Contents Part 1: Changes to mailing list Personals: People on the move People going up Awards and Recognitions IFAC News: Working Group on "Air Traffic Control Automation" Journals: TOC November 1992 Issue of IFAC Journal AUTOMATICA RENDICONTI DEL SEM. MAT. UNIV. POLITEC.,TORINO: a special issue TOC Volume 172 Contents of LAA TOC Circuits, Systems, and Signal Processing 11, No. 4, 1992 LAA Special Pensacola Conference Issue The new IEEE Transactions on Control Systems Technology IEEE Trans Control Sys Tech Special Issue: AIR TRAFFIC CONTROL VLSI Signal Processing: Special Issue Analog VLSI Computation SIAM Journal on Matrix Analysis and Applic, Oct 1992 (13, 2) Part 2: Conferences: (The 3 PROGRAMs will be found in Part 2 of the E-Letter) Intl. School on Optimal Control, Moscow, 14-25 Sep 1992 MTNS 93, August 2-6, 1993, Regensburg, Germany Columbia Workshop on Telecomm, Sep 21-22, 1992, New York IFAC Control Applications of Optimization, PROGRAM Ninth Intl. Conf Sys Eng, Las Vegas, 14-16 July 1993 Workshop Discrete Event Systems, Aug 26-28,'92, Prague, PROGRAM IEEE Regional Control Conf, July 24-25, 1992, Brooklyn, PROGRAM Methodologies Intell Sys, Trondheim, Norway, June 15-18, 1993 IMACS Math. Intell. Models Syst. Simul., Brussels, Ap 12-16, '93 Part 3: New Books Published: Book Announcement, George D. Byrne Faculty Positions Available/Wanted: Position Wanted UPATE ON SCAD DATABASE Reports available: Reports, Electronic Sys Signals Lab, Wash U Misc: Gnans -- **FREE** program for simulation of dynamical systems "Fuzzy Control: Facts, Japan, and Europe," by Pierre Bernhard *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: George D. Byrne Book Announcement We are pleased to announce the publication of the book "Recent Developments in Numerical Methods for ODEs/DAEs/PDEs," ISBN 981-02-0557-0, which was edited by George D. Byrne and William E. Schiesser. The publisher is World Scientific Publishing Company, Suite 1B, 1060 Main Street, River Edge, NJ 07661, telephone 201/487-9655, FAX 201/487-9656. The book is a collection of papers presented at the November 1990 American Institute of Chemical Engineers Annual Meeting in a session by the same name as the title. One objective of the book and of the session was to bring people active in numerical methods in contact with those who use them. The contents of the book are as follows: "An Overview of Recent Developments in Numerical Methods and Software for ODEs/DAEs/PDEs," by G. D. Byrne and W. E. Schiesser. "Experiments with an Ordinary Differential Equations Solver in the Parallel Solution of Method of Lines Problems on a Shared Memory Parallel Computer," by D. K. Kahaner, E. Ng, W. E. Schiesser, and S. Thompson. "CRAYFISHPAK: A Vectorized Fortran Package to Solve Helmholtz Equations," by R. A. Sweet. "Experiments with an Adaptive H-, R-, and P-Refinement Finite Element Method for Parabolic Systems," by J. E. Flaherty and Y. Wang. "Incomplete Block Factorization Preconditioners: An Implementation for Block Tridiagonal Systems," by D. E. Salane. "Fast Generation of Weights in Finite Difference Formulas," by Bengt Fornberg. "Numerical Methods for Boundary Value Problems in Differential-Algebraic Equations," by U. M. Ascher and L. R. Petzold. "The Solution of a Co-Polymerization Problem with VODE," by G. D. Byrne. Index. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: nikitin@mathematik.uni-kl.de (Dr.Sergey Nikitin) POSITION WANTED Now I work in Federal Republic of Germany (in Kaiserslautern University) as a Humboldt fellow. The field of my scientific interests is geometrical nonlinear system theory, control theory of systems described by partial differential equations, neural networks theory. I have more than 25 papers published, most of them firstly have been published in russian and only 15 papers have been translated in english. All papers in russian have been published in collabora- tion with academician Emelyanov. I have writen also 5 papers in Germany, two of them in collaboration with prof. D.Pratzal-Walters and Dr. St.Scmid and three of them myself. All these works except the last one are devoted to nonlinear control systems and systems with distributed parameters (i.e., described by partial differential equations) and only in the last one neural networks have been considered. I worked as a teacher in Moscow State University (M.V.Lomonosov). I gave lectures on "Nonlinear system theory (geometrical approach)" and gave trainig exercises on the theory of partial differential equations for 4-th year students(1989-1990). I gave also lectures on automatic control theory(1990-1991, Moscow Institute of Steel and Alloy). I gave lectures on stability theory of nonlinear systems (summer(1990) and autumn(1991),Univ.Kaiserslautern,FRG) Now I am giving lectures on "Nonlinear system theory"(1992, Univ.Kaiserslautern,FRG). I am 30 years old, have been graduated from Moscow State University (Mechanics and Mathematics Departmant). In 1986 I have got Doctor Degree in Control theory and worked from 1982 till 1991 in All Union Research Institute of System Studies(Russia, Moscow)( I worked also as a teacher since 1989). In 1988 I have been awarded of the prize(Lenins Komsomol prize of USSR) for the works on control theory. Since August(1991) I work in Germany. The Humboldt fellowship will be finished in December 1992. I am seeking faculty or a post-doctoral position in control and communication systems. If you need an aditional information or you have something to tell me, then feel free to contact me in any time you want. My address: University, Kaiserslautern, Fachbereich Mathematik Arbeitsgruppe Technomathematik Postfach 3049 W-6750 Kaiserslautern priv.tel. 0631/17702 ; office 0631/205-2743 elm nikitin@mathematik.uni-kl.de Telex 45 627 unikl d Telefax (0631)205-3052 *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Raimund J. Ober UPDATE ON SCAD DATABASE -- ******************************************************************************* #### #### ## ##### # # # # # # # #### # # # # # # # ###### # # # # # # # # # # #### #### # # ##### Systems and Control Archive at Dallas ftp address: ftp.utdallas.edu IP number: (129.110.10.11) IMPORTANT: for technical reasons the IP number for the next few weeks is: 129.110.10.1 queries: ober@utdallas.edu ****************************************************************************** New contents: ============= The following scad directories contain new material: eletters: ========= - eletter issues: 51-1, 51-2, 51-3 cacsdletters: ============ - OPEN CACSD issues: volume 1 number 6: cacsdv1n6 volume 1 number 7: cacsdv1n7 nonlineartoolbox: ================= - There is a new version (Version 0.5) of the nonlinear systems toolbox provided by Art Krener. It corrects a bug in a the earlier version of the toolbox. preprints: ========== L. Pandolfi: The standard regulator problem for systems with input delays---An approach through singular control theory pandolfi.reg.latex A new solution to the quadratic regulator problem for systems with input delays. Our approach makes use of the existing theory of the singular quadratic regulator problem for distributed systems. L. Pandolfi: An Integral Equation Approach to the Singular Values of a System with Distributed Output Delays. pandolfi.hankel.latex A state--space approach to the analysis of the Hankel singular values of a system with output delays and we derive asymptotic estimates for them. The following new report from the Systems and Control Center at Rutgers can now be found in the subdirectory preprints/syconreports: filename: sycon-92-04.tex (LaTeX file) Sycon report 92-04, June 1992: ``Global stabilization of nonlinear affine systems with continuously differentiable feedback,'' by Yudi Yang (19+i pp) ABSTRACT: This paper deals with questions of global stabilizability of nonlinear systems. Based on the use of control-Lyapunov functions, we obtain a class of stabilizing feedback laws, which generalize that introduced by Sontag. We give a sufficient condition for such feedbacks to be continuously differentiable. Then we apply this condition to a wide class of two- and three-dimensional systems, extending some recent results on stabilization. *********** Remember to send your tech reports and other material! ********* How to access scad: =================== Scad can be accessed using ftp. The ftp address is: ftp ftp.utdallas.edu (IP number: 129.110.10.11 (129.110.10.1 for the time being) You simply type: ftp ftp.utdallas.edu or: 129.110.10.11 (129.110.10.1 for the time being) When asked for your name, type: anonymous When asked for your password, type your emailaddress: me@mymachine.myuniversity To get to scad type: cd pub/scad To get more info about scad get the README file and examine it on your machine: get README To see the directories in scad type: dir To change to (e.g.) conferences: cd conferences To see the subdirectories: dir To change to the CDC91 subdirectory: cd 91cdc-prog To examine this directory: dir To get a file, type e.g.: get AdvPrgmFinal-Wed.txt To finish the session: quit What follows is an example of such a session: ftp ftp.utdallas.edu Connected to ASPEN.UTDALLAS.EDU. 220 aspen.utdallas.edu FTP server (Version 5.64) ready. Name (ftp.utdallas.edu:joe): anonymous 331 Guest login ok, please send your e-mail address as a password. Password: 230 Guest login ok, access restrictions apply. ftp> cd pub/scad/conferences/91cdc-prog 250 CWD command successful. ftp> get README 200 PORT command successful. 150 Opening ASCII mode data connection for README (77 bytes). 226 Transfer complete. local: README remote: README 79 bytes received in 0.04 seconds (1.9 Kbytes/s) ftp> get AdvPrgmFinal-Wed.txt 200 PORT command successful. 150 Opening ASCII mode data connection for AdvPrgmFinal-Wed.txt (44311 bytes). 226 Transfer complete. local: AdvPrgmFinal-Wed.txt remote: AdvPrgmFinal-Wed.txt 45857 bytes received in 7.3 seconds (6.1 Kbytes/s) ftp> get AdvPrgmFinal-Th.txt 200 PORT command successful. 150 Opening ASCII mode data connection for AdvPrgmFinal-Th.txt (42454 bytes). 226 Transfer complete. local: AdvPrgmFinal-Th.txt remote: AdvPrgmFinal-Th.txt 43909 bytes received in 20 seconds (2.1 Kbytes/s) ftp> get AdvPrgmFinal-F.txt 200 PORT command successful. 150 Opening ASCII mode data connection for AdvPrgmFinal-F.txt (42111 bytes). 226 Transfer complete. local: AdvPrgmFinal-F.txt remote: AdvPrgmFinal-F.txt 43571 bytes received in 7 seconds (6.1 Kbytes/s) ftp> quit MORE INFO: There is README file in /pub/scad which contains more info on how to submit material to SCAD. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Donald L. Snyder dls@saturn.wustl.edu RESEARCH MONOGRAPHS 1992 ELECTRONIC SYSTEMS AND SIGNALS RESEARCH LABORATORY DEPARTMENT OF ELECTRICAL ENGINEERING WASHINGTON UNIVERSITY ST. LOUIS, MISSOURI 63130 The following is a list of research monographs for 1992 from the Electronic Systems and Signals Research Laboratory. Individual copies are available upon request from: Director Electronic Systems and Signals Research Laboratory Department of Electrical Engineering Campus Box 1127 Washington University One Brookings Drive St. Louis, Missouri 63130 e-mail requests to: dls@saturn.wustl.edu NUMBER AUTHOR AND TITLE --------------------------- ESSRL-92-1 M. I. Miller, T. I. Schaewe, C. S. Bosch, J. J. H. Ackerman, R. G. Jost, A. S. Greene, and S. Nadel, "A Mathematical Signal Model for Phase and Frequency Encoded Magnetic Resonance Imaging Data." ESSRL-92-2 T. J. Schaewe and M. I. Miller, "Parallel Algorithm For Maximum A-Posteriori Estimation Of Spin Density and Spin-Spin Decay in Magnetic Resonance Imaging." ESSRL-92-3 S.C. Chen, T.J. Schaewe, R.S. Teichman, and M.I. Miller, "Parallel Algorithms for Maximum Likelihood Nuclear Magnetic Resonance Spectroscopy." ESSRL-92-4 K. E. Mark and M. I. Miller, "Bayesian model selection and minimum description length estimation of auditory-nerve discharge rates." ESSRL-92-5 A. D. Lanterman, "A New Way to Regularize Maximum-Likelihood Estimates for Emission Tomography with Good's Roughness Penalty." ESSRL-92-6 P. Moulin, J. A. O'Sullivan, and D. L. Snyder, "A Method of Sieves for Multiresolution Spectrum Estimation and Radar Imaging." Reprint from IEEE Transactions on Information Theory. ESSRL-92-7 R. E. Morly, Jr., A. M. Engebretson, G. L. Engel, and T. J. Sullivan. "Electronic Filters, Signal Conversion Apparatus, Hearing Aids and Methods." United States Patent 5,111,419. ESSRL-92-8 J. S. Prater and W. D. Richard, "Segmenting Ultrasound Images of the Prostate Using Neural Networks." ESSRL-92-9 D. L. Snyder, T. J. Schulz, and J. A. O'Sullivan, "Deblurring Subject to Nonnegativity Constraints.", Reprint from the IEEE Transactions on Signal Processing. ESSRL-92-10 U. Grenander, M. I. Miller, G. E. Christensen, "Deformable Anatomical Data Bases Using Global Shape Models: A Position Paper for the 1992 EIHB Workshop." ESSRL-92-11 C. S. Butler and M. I. Miller, "Maximum A Posteriori Estimation for SPECT Using Regularization Techniques on Massively-Parallel Computers." ESSRL-92-12 M. I. Miller and C. S. Butler, "3-D Maximum A Posteriori Estimation for Single Photon Emission Computed Tomography on Massively-Parallel Computers." ESSRL-92-13 K. Mark, M. I. Miller, U. Grenander, and S. Abney, "Parameter Estimation For Constrained Context-Free Language Models." ESSRL-92-14 M. I. Miller, S. C. Chen, D. A. Kuefler, and D. A. D'Avignon, "Maximum Likelihood and The EM Algorithm For 2-D NMR Spectroscopy." ESSRL-92-15 J. A. O'Sullivan, P. Moulin, D. L. Snyder, and D. G. Porter, "An Application of Estimation Theoretic Radar Imaging." *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by Bengt Martensson ANNOUNCING GNANS 1.0 BETA Gnans, a free program for stochastic and deterministic dynamical systems, is ready in beta test version. Gnans is a program (and language) for the numerical study of deterministic and stochastic dynamical systems. The dynamical systems may evolve in continuous or discrete time. It has an intuitive Graphical User Interface using the X Window System. It has been ported to Sun4 and Sun3, Silicon Graphics, and IBM RS6000 (the latter two do not have dynamic loading implemented, though). Gnans loads a ``system'', a definition of a dynamical system in a special, equation oriented, language. The description consists of declarations of states etc, and equations describing the dynamics of the system. As an advanced feature, arbitrary C++-code may also be contained in the system description. Gnans sorts the equations and translates the system and is then able to solve the system equations numerically with the speed of a compiled (as opposite to interpreted) program. Several numerical integrators, also for stochastic (Ito-) differential equations, are provided. Gnans has an intuitive user interface, making it possible to control the program and to change all relevant parameters using an intuitive point-and-click interface. In this operation, it can be considered ``an initial value problem (IVP) engine''. Using a simple script language, this IVP-engine can be programmed. As a by-product, this offers the possibility of a tty interface. (Actually, as another by-product, Gnans contains a rather powerful pocket calculator!) Interactive plotting program can be run as child processes, with the possibility to define commands to be sent by the press of a button to the interactive plotting program. Gnans 1.0 is copyrighted, but freely distributable under the Gnu General Public License. An ANSI C compiler is required (even if you just get the binaries), and C++ desirable. Gcc version 2.2.2 is fine, and free. Requires X11 Release 4 or 5. For compiling the sources Flex and the Athena widgets are required. The program has been tested on Sun3 and Sun4's, operating system SunOS 4.1.1 and 4.1.2, with MIT X11R5 and OpenWindows 3, with gcc 2.2.x; on Silicon Graphics X11R4 with gcc 2.2.2; on AIX with the native C compile (xlc) and X11R5. You can get Gnans by anonymous ftp to mathematik.uni-Bremen.de (134.102.232.101 for those of you without nameserver). (Username ``ftp'', use your email address as password.) You can get either the sources (recommended) or Sparc binaries. No distribution by other media, at least not now. Please also drop me an email, and tell me about your success with the installation, and any bugs you encounter. Please note: this is a new program, and has probably still a number of bugs. You have been warned. Also, neither support nor guarantee of any kind is included in the price. I expect everyone who picks up the program to REPORT BUGS, preferably with fixes. If you don't want to contribute in this way, or if you want ``support'', please buy ACSL, Simnon, or Simulab instead. Volunteerers to port Gnans to other platforms (modern Unix, C++, X) are also solicited. I also would be very happy for contributed enhancements. (Finally, if this note appears VERY soon after my submission, it may take yet a few days before I have set up the ftp stuff. In that case, please try again a few days later.) Bengt Martensson +49 421 218-2952 (office) Institute for Dynamical Systems +49 421 171713 (home) University of Bremen +49 421 218-4235 (fax) P.O. Box 330 440, D-2800 Bremen 33, F.R.G. bengt@mathematik.uni-Bremen.de *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: the Editors FUZZY CONTROL: FACTS, JAPAN, AND EUROPE Pierre Bernhard, INRIA Sophia Antipolis, France, May 1992 --editor's note: This is reprinted, with permission and slightly updated, from the European Control Newsletter. We thought it would be of great interest to our readership. Short replies can be sent to the Eletter editors and will be posted in the next issue. FOREWORD This is a slightly updated version of an older memo in French, which was never intended to be published in a French journal, let aside in a European one. The idea was rather to settle my mind, and have an answer ready to the very many requests I recieved about fuzzy control, mainly due to the abundant advertisement it enjoyed in the non technical press. A few things I wrote about where fuzzy control is being applied are not compltely true anymore. But I believe that globally the idea remains correct. The original version bared a foreword acknowledging the help of Jean-Marie Nicolas and Michel Grabisch, both of Thomson-Sintra, France. FRAMEWORK AND LIMITS The general theory of "fuzzy" logic currently enjoys a rapid developpement with many applications, specially in Japan. What I write here is narrowly confined to fuzzy control . This is only one of the many applications, although often advertised as the most prominent one. It is in no way the only one. I know, and say, nothing about applications to such things as knowledge representation (which was the original motive behind fuzzy set theory), expert systems and the like. 1) FUZZY CONTROL IN JAPAN The basis of fuzzy control is to express a control law in terms of expert rules. The rules define the control value, or its rate of change, for some (range of) values of the measured variables or their rate of change. The specific techniques of fuzzy set theory can be seen as a systematic way of interpolating the data points. The language used is one of sequential decisions, and as such is always applied to control problems which are fundamentally conditional sequencing problems, and where the continuous control part is completely elementary. It is symptomatic that the yardstick used to juge the efficiency of this control is always the PID. Take the often quoted example of a bathtub hot/cold water mixer. It takes into account the fact that the water that first flows when one opens the hot tap is cold, and therefore reaches the desired temperature faster than a fixed gain PID. A "success" of fuzzy control. In its original form at least, fuzzy control shares the ideology of expert systems to automatise what an expert knows how to do, not to do things no human expert can do. The motive of research in fuzzy control is therefore not to push back the limits of what automatic control can perform, even less to prove things about the performance of a control mechanism, such as stability, optimality, sensitivity. As in expret systems, experimentation is the means of validation. The single stick balancing problem is also often quoted as test case. I consider it unfair to fuzzy control. As a matter of fact, it is a simple problem, with no sequencing involved. As a consequence, for a single boom, adjusting the coefficients of a PID that would do the job is much faster than using fuzzy control, and for the double boom with no measurement of the upper boom's angle with the lower one, an human expert cannot do it, nor fuzzy control either. I think fuzzy control is a good tool where it applies, and I shall come back to that point in the next section. However it has been oversold on unjustified grounds, which obliges us to review some of the claims made. -1) Gentleness. "Because it is fuzzy, fuzzy control is more gentle to the user than classical control which, for lack of fuzziness is by its essence bang bang". Do not laugh, this has often been said. It impresses the ignorants and the newsmen. The people who said that may have been themselves more ignorant of what control is than outright dishonest. -2) Ease of implementation. This requires a more careful examination. The proponents of fuzzy control acknowledge that there are very many parameters to chose to setup such a control law. If the comparison item is PID, then the later is clearly easier to implement. If the comparison item is a problem that the PID would not solve (or a PID with, say, cubic terms added to it), then one has to look at the boundary of the possibilities of fuzzy control. And the simplicity is gone. (It requires something like 49 rules to balance a single stick while maintaining control of its translation). As a matter of fact, the very idea of what is simple depends very much on one's educational background. What is true is that fuzzy control lets one solve control problems with no mathematical education whatsoever. Where a more fundamental simplicity comes in is when the overall problem contains both conditional sequencing and simple continuous control. Again we shall come back to that. -3) Robustness. I have seen no publication that scientifically substantiates the claim of greater robustness of fuzzy control as compared to modern control, nor any that disproves it for that matter. -4) Lower computational requirements. This I consider as a false claim. The method of iterpolation used is computer intensive (all rules are continuously evaluated and their conclusions weighted according to their degree of truth in a sophisticated way). What is true is that this is of no real importance, because thanks to specialized chips, it is cheaply done. A definite weakness of this approach is that the inherent complexity of the interpolation process induced makes it essentially impossible to prove anything about the control laws generated. Anyhow, this poof would not be in the spirit of the method: the human controller does not "prove" his know-how either. Let us quote the three reasons Dr Sugueno (scientific director of Laboratory for International Fuzzy Engineering) gives for the success of fuzzy control in Japan: i) The carefull choice of the applications ii) The quality and the efficiency of Japanese engineers iii) The good fit with Japanese way of thinking We leave it to the reader to interpret these explanations. The last one should not be underestimated, coupled with an "invented here" syndrome, in a more nationalistic society than ours. One could deduce from the above that there is little more than a regression from mathematical analysis to empirical imitation of the human operator, and disregard the whole story. I believe that this would miss the point. 2) THE EUROPEAN RESPONSE The chalenge is less scientific than industrial. It is threefold. The first striking fact is the wide range of elementary applications that have been widely quoted as success stories for fuzzy control. The good idea there is not to have included a fuzzy digital controller, it is to have included a digital controller. Japanese industry has been the first to understand that digital devices are from now on cheap and reliable, and to draw the practical consequences, that they can be put to use in cheap home appliances and other aparatus. The response of Europe here should be to encourage our industry to use digital devices more extensively to improve consumer products. A second remark is that qualifying simple control problems as "research" (since fuzzy control was new) has given the Japanese university scientists an opportunity to discover the pragmatic questions that standard industry had to face. What they discovered were problems were the practical difficulty to use commercially available tools was to make coexist simple continuous time controls with complicated sequencing tasks. What fuzzy control brought them was a single language to describe both, in terms of expert rules. A european response might build upon the clear European lead in synchronous programming. But then such tools as the new real time languages (ESTEREL, SIGNAL, LUSTRE, to quote the three that cooperate in France) should be carefully hidden to the user, deeply burried in a system providing an elementary interface, devised to let the user solve elementary control problems of that type, with little control knowledge. The genial feature of the Japanese fuzzy control culture has been to bring a tool well suited to their engineers (often with less control engineering education than their European counterpart) to solve simple problems. (And fuzzy control has been a good excuse, because it is unable to solve advanced, multivariable, control problems). There is a niche for fuzzy control, or any tool sharing the peculiarities we described, (and better ones might be devised : fuzziness is not unavoidable in that respect. The real important feature is rather rule based control ) that we would be foolish to ignore, mainly since larger economic dividends may be at stake with simple problems than with advanced ones. 3) CONCLUSION: INDUSTRIAL ISSUES The formidable advertisement that fuzzy control has enjoyed in the (mainly non technical) literature is of course not devoid of commercial aims. This is not the place to analyze them in details. Let us just recall that since consumer products are concerned, the non technical press was indeed the place where this commercial drive had to be carried out. Later will come the market for the specialized chips. Finally, my friends in industry drew my attention to a last point which is probably not the least important one. This very article serves the purpose of entrenching the idea that there is a completely new theory behind fuzzy control, since it is being debated in scientific circles and universities, in Japan first and now in the US and Europe. If this is a completely new theory, nothing that is constructed referring to it can fall under old patents. Therefore, Japanese industry (or, for that matter, any industry clever enough to seize that opportunity) is instantly freed from all previous patents. It is straightforward to program (approximately) a PID controller with saturation using fuzzy control. Because it will be a fuzzy controller, it cannot be challenged by an old patent. And of course this is true of many other devices. This is a matter for industry to address, not academia. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** End of Eletter No. 52, Part 3, July 1992.