E-LETTER on Systems, Control, and Signal Processing ISSUE No. 50, 12 March 1992 Editors: Bradley W. Dickinson bradley@princeton.edu or bradley@pucc.bitnet Eduardo D. Sontag sontag@hilbert.rutgers.edu or sontag@pisces.bitnet 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 Changes to mailing list Personals: People on the move People going up Awards and Recognitions IEEE Control Systems Society News: Control Systems Technology Award nominations sought New Electronic Newsletter on Open CACSD Systems Journals: MCSS Contents Volume 5, Number 3, 1992 TOC LAA volumes 165, 166, 167 Call for Papers - ELEKTRIK Conferences: DIMACS/IEEE Coding and Quantization, Rutgers, Oct 19-21, 1992 MTNS 93, Aug 2-6, 1993, Regensburg **PROGRAM** IFAC Nonlinear Control, 24-26 June 1992, Bordeaux From Animals to Animats, December 7-11, 1992, Hawaii Applied Probability Day, April 1, 1992, New York City IEEE Regional Control Conf., July 24-25, 1992, Brooklyn, NY IEEE Symp. on Intelligent Control 11-13 August 1992 Glasgow Books: Linear System Theory - A Graduate Course, Rugh Applied Optimal Control and Estimation, Lewis Errata and MATLAB .M files for `Multivariable Feedback Design' Faculty Positions Available/Wanted: Wanted: Archil Gulisashvili Postdoctoral Position at the Australian Defence Force Academy DSP for Speech, Inst. for Perception Research, Eindhoven SCAD Database Update OPEN CACSD Eletter M-files for H-infinity Design, Glover-Doyle algorithm, LQ Recent SYCON Reports Misc: Control seminar at Michigan State University *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by the Editors: Changes/Additions to mailing list. Changes and Updates: ------------------- iven@faceng.anu.edu.au (Iven Mareels, Australian National Univ., Canberra) robevans@mullian.ee.mu.oz.au (Rob Evans, Univ. of Melbourne, Australia) mk@boole.att.com (Mark Karol, AT&T Bell Labs, Holmdel, NJ) cao@school.enet.dec.com (Xi-Ren Cao, Digital Equip. Corp, Littleton, MA) mrg@cblpe.att.com (Mario R. Garzia, AT&T Bell Labs, Columbus, OH) miyaji@homxc.att.com (Wendell Miyaji, AT&T Bell Labs, Holmdel, NJ) siegwart@ifr.ethz.ch (Roland Siegwart, ETH Zurich, Switzerland) banavar@windchime.arc.nasa.gov (Banavar Sridhar, NASA Ames Research Center) karl@athena.mit.edu (W. Clem Karl, M.I.T., Cambridge, MA) verghese@athena.mit.edu (George Verghese, MIT) Additions: --------- SABERI@wsuvm1.csc.wsu.edu (Ali Saberi, Washington State Univ., Pullman) karray@ee.ubc.ca (Fakhreddine Karray, Univ. of British Columbia, Vancouver) jpc@greco.enpc.fr (J-P.Chancelier, Ecole Natl Ponts & Chaussees,Noisy-Le-Grand) helmke@vax1.rz.uni-regensburg.dbp.de (Uwe Helmke, Univ. Regensburg, Germany) gyyz@aem.umn.edu (Yiyuan Zhao, Univ. of Minnesota, Minneapolis) lasserre@laas.fr Jean B. Lasserre LAAS-CNRS, Toulouse, France hwolkowicz@orion.uwaterloo.ca (Henry Wolkowicz, Univ. of Waterloo, Canada) nihal@ee.cornell.edu (Nihal I. Wijeyesekera, Cornell Univ.) SGALLARI@CIRAM1.CINECA.IT (Fiorella Sgallari, Univ. of Bologna, Italy) eletansh@nuscc.nus.sg (Shao Hua Tan, Nat'l. Univ. of Singapore) rose@ece.ucsb.edu (Ken Rose, Univ. of California, Santa Barbara) cbs@wiliki.eng.hawaii.edu (Christian Schlegel, Univ. of Hawaii) attjt@asuacvax.bitnet (Thomas Taylor, Arizona State Univ., Tempe) brave@elia.epfl.ch (Yitzhak Brave, EPFL, Lasuanne, Switzerland) terwiesch@ezzeus.vmsmail.ethz.ch (Peter Terwiesch, ETH Zurich, Switzerland) brooks@hilbert.coe.northeastern.edu (Dana Brooks, Northeastern U., Boston, MA) tharp@ece.arizona.edu (Hal S. Tharp, Univ. of Arizona, Tucson) sam101@syseng.anu.edu.au (Sam Crisafulli, Australian Nat'l Univ., Canberra) wynn@ee.byu.edu (Wynn Stirling, Brigham Young Univ., Provo, UT) bishop@zeus.ae.utexas.edu (Bob Bishop, Univ. of Texas, Austin) *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by the Editors -- PERSONALS ********** PEOPLE ON THE MOVE ************ (1) After July 1, 1992, George Cybenko will be at the Thayer School of Engineering at Dartmouth College in Hanover, New Hampshire. He will be the Dorothy and Walter Gramm Professor of Engineering. His new address will be: Thayer School of Engineering Dartmouth College Hanover, NH 03755-8000 Phone number: (603) 646-2238 Fax number: (603) 646-3856 Email to be determined in the future. (PLEASE do NOT use the above address before the effective date) *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** (2) From: shamma@emx.utexas.edu As of Summer 1992, I will leave the University of Minnesota. I am moving to the Department of Aerospace Engineering and Engineering Mechanics at the University of Texas at Austin as an Assistant Professor. I am currently at UT Austin on leave-of-absence from Minnesota. My new address is: Jeff Shamma Department of Aerospace Engineering and Engineering Mechanics (ASE/EM) The University of Texas at Austin WRW 405A Austin, Texas 78712 512-471-5322 512-471-3788 (FAX) shamma@emx.utexas.edu This will continue to be my address when my appointment at Minnesota expires. ********** PEOPLE GOING UP ************ ********** AWARDS AND RECOGNITION ************ ******* CHANGES OF ADDRESS, PHONE, ETC ******* ******* send us more information for the gossip column!!! ******* *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** IEEE Control Systems Society News Nominations Sought for 1992 Control Systems Technology Award Nominations are now open for the 4th annual IEEE Control Systems Technology Award. This award is given for outstanding contributions to control systems technolgy, either in design and implementation or in project management. It may be conferred on either an individual or a team. The prize consists of $1000 plus a certificate and will be awarded in December at the IEEE Conference on Decision and Control to be held in Tucson, Arizona. The deadline for nominations is June 30, 1992. While no special nomination format is required, the nomination letter should indicate clearly the nature and impact of the contribution and should also provide documentation (patents, publications, reports, etc.) supporting the nomination. Up to three letters of recommendation may be included from others who are familiar with the contribution. Please send your nominations to the Chair of the Technology Award Committee: E. O. King PCMT Division/Building B Alcoa Center, PA 15069 USA FAX: (412)-337-3590 The selection committee reflects a variety of control technology and applications areas: E. H. Briston Foxboro S. M. Joshi NASA K. R. Lorell Lockheed W. F. Powers Ford Motor Company E. O. King ALCOA *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Chris P. Jobling (eechris@pyr.swan.ac.uk) Announcing a New Electronic Newsletter for the IFAC/IEEE-CSS Working Group on Guidelines for Open CACSD Software OPEN CACSD, is the electronic newsletter of the IFAC/IEEE-CSS Working Group on Guidelines for Open Computer-Aided Control Systems Design (CACSD) Software. This newsletter will be distributed approximately two or three times a month by its moderator (me) from the University of Wales in Swansea, scene of the famous IFAC CADCS '92 conference at which Jan Maciejowski resurrected the working group. Items covered include any subject related to the "opening up" of computer-based applications for the analysis, design, simulation and implementation of control systems. Examples of suitable topics would be o data definitions for CACSD o user interfaces for CACSD o system modelling languages o environments for the integration of CACSD tools o how to get CACSD packages to talk to each other o advantages and disadvantages of Matlab, MATRIXx, ACSL etc. o examples of good or bad practice in commercial packages Our aim is to stimulate the exchange of ideas about what an open CACSD system is or ought to be and hopefully shame the developers into giving us what we need, not what they want us to have! I hope that you will subscribe to the newsletter by sending a request to eechris@pyr.swan.ac.uk. I'd also welcome contributions so that we can make the newsletter interesting and informative. Please send contributions for the newsletter to: eechris@pyr.swan.ac.uk. We aim to keep archive copies of this newsletter and electronic versions of interesting (long) articles at the Control Information Database at Glasgow and the Systems and Control Archive at Dallas (SCAD). Instructions for accessing these will be given in the first issue. We hope to get the first issue out before the CACSD '92 Conference in Napa in March, at we'd also like a paper version for distribution to the antendees, so get your contributions in. p.s. Issues 1 and 2 have already been distributed. Back issues are available from me. Just request the back issues when you subscribe. Chris P. Jobling, Control and Computer-Aided Engineering Research Group, Deptartment of Electrical and Electronic Engineering, University of Wales, Swansea, Singleton Park, Swansea, SA2 8PP, UK Email: JANET: eechris@uk.ac.swan.pyr BITNET: eechris%pyr.swan.ac.uk eechris%pyr.swan.ac.uk@ukacrl.bitnet INTERNET: eechris%pyr.swan.ac.uk@cunyvm.cuny.edu eechris%pyr.swan.ac.uk@nsfnet-relay.ac.uk Tel: +44 792 295580 Fax: +44 792 295678 *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by the editors Contents Mathematics of Control, Signals, and Systems Vol. 5, No. 3 (1992) Nonlinear $H^\infty$ Control Theory for Stable Plants J. A. Ball and J. W. Helton Stationary Discrete-Time Covariance Factorization Using Newton-Raphson Iteration L. B. White and B. D. O. Anderson $L^1$ Sensitivity Minimization for Plants with Commensurate Delays M. A. Dahleh and Y. Ohta Global Asymptotic Stabilization for Controllable Systems Without Drift J.-M. Coron Toward Time Varying Balanced Realizations via Riccati Equations J. Imae, J. E. Perkins, and J. B. Moore Time-Scale Decomposition of the Reachable Set of Constrained Linear Systems A. L. Dontchev *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Richard A. Brualdi Announcement: Table of Contents of LAA volumes 165, 166, and 167 Contents Volume 165, March 1, 1992 Georg Heinig (Leipzig, Germany) Inverse Problems for Hankel and Toeplitz Matrices 1 M. Gasca and J. M. Pena (Zaragoza, Spain) Total Positivity and Neville Elimination 25 Scott J. Beslin (Thibodaux, Louisiana) Cofactor Matrices 45 W. Sun (Windsor, Ontario, Canada) The Interior and Closure of Strongly Stable Matrices 53 K. Manjunatha Prasad (Bangalore, India) and R. B. Bapat (Delhi, India) The Generalized Moore-Penrose Inverse 59 Leonid Faybusovich (Cambridge, Massachusetts) Reduction to Generalized Hessenberg Form and Inverse Spectral Problems 71 Ulrike Flaschka (Bielefeld, Germany), Wen-Wei Lin, and Jy-Liang Wu (Hsinchu, Taiwan) A KQZ Algorithm for Solving Linear-Response Eigenvalue Equations 93 Jerzy K. Baksalary and Tarmo Pukkila (Tampere, Finland) A Note on Invariance of the Eigenvalues, Singular Values, and Norms of Matrix Products Involving Generalized Inverses 125 John Corning Carey (Santa Barbara, California) The Riemann Hypothesis as a Sequence of Surface to Volume Ratios 131 Gi-Sang Cheon and Suk-Geun Hwang (Suwon, Republic of Korea) Maximization of a Matrix Function Related to the Dittert Conjecture 153 LeRoy B. Beasley (Logan, Utah) and Norman J. Pullman (Kingston, Ontario, Canada) Polynomials Which Permute Matrices Over Commutative Antinegative Semirings 167 James K. Knowles (Pasadena, California) On a Minimization Problem Associated With Linear Dynamical Systems 173 Michael P. Drazin (West Lafayette, Indiana) Extremal Definitions of Generalized Inverses 185 Ruey-Jen Jang and Harold Dean Victory, Jr. (Lubbock, Texas) On Nonnegative Solvability of Linear Integral Equations 197 B. E. Cain and S. A. Nelson (Ames, Iowa) Solutions to x_axb=w 229 D. J. Hartfiel (College Station, Texas) Tracking in Matrix Systems 233 Stanley S. Chang and Chi-Kwong Li (Williamsburg, Virginia) Certain Isometries on Rn 251 Book Reviews Youcef Saad (Minneapolis, Minnesota) Review of ABS Projection Algorithms by J. Abaffy and E. Spedicato 267 LeRoy B. Beasley and Debra A. S. Beasley (Logan, Utah) Review of Linear Algebra and Its Application, Volume 1: A First Course and Linear Algebra and Its Application, Volume 2: More Advanced by D. H. Griffel 269 Errata 273 Author Index 275 Contents Volume 166, March 15, 1992 Wandi Wei and Benfu Yang (Chengdu, China) Finite Orthogonal Geometries With Characteristic =2 and PBIB Designs. II 1 Marc A. Berger and Yang Wang (Atlanta, Georgia) Bounded Semigroups of Matrices 21 Frank Hansen (Copenhagen, Denmark) Functions of Matrices With Nonnegative Entries 29 Miron Tismenetsky (Heidelberg, Germany) Factorizations of Hermitian Block Hankel Matrices 45 Vlastimil Ptak (Prague, Czechoslovakia) The Infinite Companion Matrix 65 W. Ledermann and S. Vajda (Falmer, Brighton, United Kingdom) On a Problem in Population Structure 97 Che-Man Cheng (Hong Kong, China) Independence of Eigenvalues and Independence of Singular Values of Submatrices 115 L. Brugnano and D. Trigiante (Bari, Italy) Tridiagonal Matrices: Invertibility and Conditioning 131 Kimmo Eriksson (Stockholm, Sweden) Convergence of Mozes's Game of Numbers 151 Josep E. Peris and Begona Subiza (Alicante, Spain) A Characterization of Weak-Monotone Matrices 167 Ning Lu (Houston, Texas) A Simple Presentation of the Siegel Modular Groups 185 Helena Albuquerque (Coimbra, Portugal) and Alberto Elduque (Zaragoza, Spain) On the Nullity of Lie Algebras 195 Lucas Jodar (Valencia, Spain) Explicit Solutions for Second-Order Operator Differential Equations With Two Boundary-Value Conditions. II 207 Ronald J. Evans (La Jolla, California) and Gerald A. Heuer (Moorhead, Minnesota) Silverman's Game on Discrete Sets 217 Edward Spence (Glasgow, Scotland) Eigenvalues of a Class of (0, +_1) Symmetric Matrices 237 J. P. Dauer and O. A. Saleh (Chattanooga, Tennessee) A Representation of the Set of Feasible Objectives in Multiple Objective Linear Programs 261 Book Review Bostwick F. Wyman (Columbus, Ohio) Review of Mathematical Control Theory: Deterministic Finite Dimensional Systems by Eduardo D. Sontag 277 Author Index 280 Contents of LAA Volume 167, April 1, 1992 Preface 1 Daniel Hershkowitz (Haifa, Israel) The Height Characteristic of Block Triangular Matrices 3 Naomi Shaked-Monderer and Abraham Berman (Haifa, Israel) More on Extremal Positive Semidefinite Doubly Stochastic Matrices 17 Pal Rozsa (Budapest, Hungary) and Francesco Romani (Pisa, Italy) On Periodic Block-Tridiagonal Matrices 35 S. W. Hadley (Waterloo, Canada), F. Rendl (Graz, Austria), and H. Wolkowicz (Waterloo, Canada) Symmetrization of Nonsymmetric Quadratic Assignment Problems and the Hoffman-Wielandt Inequality 53 Bit-Shun Tam (Tamsui, Taiwan) On the Structure of the Cone of Positive Operators 65 Adi Ben-Israel (New Brunswick, New Jersey) A Volume Associated With mxn Matrices 87 Mark Krupnik (Haifa, Israel) Changing the Spectrum of an Operator by Perturbation 113 Michael Gorodetsky (Haifa, Israel) Inversion of Quasitriangular Block Toeplitz Matrices 119 J. C. Willems (Groningen, The Netherlands) and P. A. Fuhrmann (Beer Sheva, Israel) Stability Theory for High Order Equations 131 Moshe Roitman and Zalman Rubinstein (Haifa, Israel) On Linear Recursions With Nonnegative Coefficients 151 Yoav Yaacoby and Peter R. Cappello (Santa Barbara, California) Decoupling the Dimensions of a System of Affine Recurrence Equations 157 Avram Sidi (Haifa, Israel) Development of Iterative Techniques and Extrapolation Methods for Drazin Inverse Solution of Consistent or Inconsistent Singular Linear Systems 171 Abraham Berman, Moshe Goldberg, and Daniel Hershkowitz (Haifa, Israel) REPORT: Haifa 1990 Conference on Matrix Theory 205 Author Index 273 *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by Kemal Inan or A New Journal on Electrical Engineering and Computer Sciences : C A L L F O R P A P E R S : : : : E L E K T R I K : : A Turkish Journal of : : Electrical Engineering and : : Computer Sciences : ELEKTRIK is a new refereed journal published 3 times a year jointly by the " Scientific and Technical Research Council of Turkey " and the " Turkish Chamber of Electrical Engineers ". The language of publication is English. ELEKTRIK welcomes papers with scholarly contributions on an international basis. In an age where technological advance and specialization is outgrowing efforts of systematic abstractions that cut across different fields of technology, unification of ideas and techniques can play a productive role. Therefore it shall be a policy of the journal to encourage contributions that focus on the "unifying" aspects of the theoretical and applied contributions within the diverse and rapidly transforming fields of Electrical Engineering and Computer Sciences. Papers shall be regrouped, when appropriate, into special issues. The first issue has a tentative publication date in the first half of 1992. ------------------------ SELECTED RECENT ARTICLES ------------------------ * Stochastic Differential Games with Weak Spatial and Strong Informational Coupling T. Basar and R. Srikant Coordinated Sciences Laboratory University of Illinois, Urbana * Design of Interruptible Electric Power Service Contracts with Stochastic Demand Chin-Woo Tan, T. Ishikida and P. Varaiya Department of Electrical Engineering and Computer Sciences University of California, Berkeley * The Random Neural Network Model E. Gelenbe Ecole des Hautes Etudes en Informatique Universite Rene Decartes, Paris * A New Algorithm and an Efficient Parallel Implementation of the EM Technique in Pet Imaging C. Buyukkoc AT&T Bell Laboratories, Holmdel * Two-Dimensional Recursive Autoregressive Lattice Analysis and Synthesis Models for Spectral Estimation A. H. Kayran Istanbul Teknik Universitesi ------------------------------------------------------ EDITOR : Kemal Inan, Orta Dogu Teknik Universitesi ------------------------------------------------------ ADVISORY BOARD Abdullah Atalar, Bilkent Universitesi Ozalp Babaoglu, University of Bologna Mehmet Baray, Bilkent Universitesi Tamer Basar, University of Illinois, Urbana Cagatay Buyukkoc, AT&T Bell Laboratories Tuncay Birand, Orta Dogu Teknik Universitesi Yurdakul Ceyhun, TELETAS Haluk Derin, University of Massachusetts Ahmet Dervisoglu, Istanbul Teknik Universitesi Erol Gelenbe, Universite Rene Decartes Emre Harmanci, Istanbul Teknik Universitesi Mithat Idemen, Istanbul Teknik Universitesi Umran Inan, Stanford University Duran Leblebici, Istanbul Teknik Universitesi Meral Ozsoyoglu, Case Western Reserve University Andrew P. Sage, George Mason University Bulent Sankur, Bogazici Universitesi Sadrettin Sinman, Orta Dogu Teknik Universitesi Yorgo Stefanopulos, Bogazici Universitesi Nazif Tepedelenlioglu, Florida Institute of Technology Yilmaz Tokad, Istanbul Teknik Universitesi Ayhan Tureli, Orta Dogu Teknik Universitesi Pravin Varaiya, University of California, Berkeley Felix Wu, University of California, Berkeley Oner Yurtseven, Purdue University Onder Yuksel, Orta Dogu Teknik Universitesi ------------------------------- INSTRUCTIONS FOR CONTRIBUTORS ------------------------------- A. Submission of Manuscript 1. Send 4 copies of your paper to the editor. The paper will be subject to a full review procedure and a decision whether to accept the paper will be taken by the editor based on the reviews. Typical review period is 3 months. 2. Enclose a separate sheet giving your preferred address for correspondence and return of proofs. B. Style for Manuscript 1. First page must contain a title of the paper, author(s) names and affiliations, abstract (not more than 300 words), complete mailing address, phone number, e-mail address if there is one and acknowledgement of financial or other support. 2. Manuscripts should be typewritten on one side of a white paper, double spaced throughout and with an ample margin. reviews. Typical review period is 3 months. 2. Enclose a separate sheet giving your preferred address for correspondence and return of proofs. B. Style for Manuscript 1. First page must contain a title of the paper, author(s) names 3. Provide an introduction that includes a statement of the purpose and the contribution of the paper comparing it to the existing results in literature. 4. If appropriate, indicate advantages, limitations and possible applications of your contribution in a conclusion section. 5. References should appear in a separate bibliography at the end of the paper. Use numerals in square brackets for references. C. Style for Illustrations 1. It is the author's interest to submit illustrations that are sharp, noise-free and of good contrast. Drafting or art service cannot be provided by ELEKTRIK. 2. Line drawings should be in black on white background. Maximum size of figures is restricted to 20 cm by 25 cm. 3. Photographs should be glossy prints, of good contrast and any reasonable size. 4. All figures must have a number and a caption. The captions must be typed on a separate sheet. The proper position of each figure in the text should be indicated in the margin by a pencil. D. Electronic Copies 1. In order to accelerate the typesetting process of the paper, once it is accepted, the authors are encouraged to send a diskette containing a LATEX file of the paper, including the figures translated into the picture environment of LATEX and the bibliography file in BIBTEX format. 2. The typesetting for ELEKTRIK shall be done in a LATEX environment with a special header. Therefore the authors should not be bothered in choosing their version of the article style in LATEX. E. Correspondence Address 1. Original Manuscripts should be sent to the address: Professor K. Inan, Editor ELEKTRIK, P. O. Box 5 Kizilay, Ankara, Turkey. All other correspondence should be sent to the address: Professor K. Inan, Editor ELEKTRIK, Electrical & Electronic Engineering Department, Middle East Technical University Ankara, Turkey. 2. Electronic copies may also be sent via e-mail to the address: inan@trmetu.bitnet *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Nader Moayeri (moayeri@winlab.rutgers.edu) CALL FOR PAPERS Joint DIMACS/IEEE Workshop on Coding and Quantization Rutgers University, Piscataway, NJ, USA October 19-21, 1992 The theory of coding and that of quantization overlap significantly, and many fundamental questions are of central interest to researchers in both fields. The goal of the workshop, which is jointly sponsored by the Center for Discrete Mathematics and Theoretical Computer Science (DIMACS)* and the Information Theory Society of the IEEE, is to promote interaction between these two communities. Four technical sessions are envisaged, and two kinds of contributions are solicited. The first consists of papers requiring approximately 30 minutes for presentation; the second consists of short papers suitable for presentation in about 15 minutes. Papers should consider some aspect of the theory/practice of coding/quantization, and should reach the organizers by June 1, 1992. The program for these technical sessions will be put together by the organizers and mailed to participants by mid July 1992. The remaining time, namely the morning of the second day, and the afternoon of the third day will be given over to unstructured interaction. There will probably be a poster session and there will certainly be a banquet. The DIMACS Conference Center can comfortably handle 100 participants. Subject to this capacity constraint, the workshop is open to all researchers interested in coding/quantization. The workshop will not have a registration fee. In addition, the sponsoring organizations have made a limited amount of funds available that will be used to partially reimburse the travel and lodging expenses of graduate students and other participants who have no alternative sources of support. Please indicate if you will be making an application for these funds. __________ * DIMACS is a National Science Foundation Science and Technology Center Questions regarding the workshop may be addressed to any of its organizers: Robert Calderbank G. David Forney, Jr. Nader Moayeri AT&T Bell Laboratories Motorola Codex Dept. of Elec. & Comp. Eng. 600 Mountain Ave. 20 Cabot Blvd. Rutgers University Murray Hill, NJ 07974-0636 Mansfield, MA 02048-1193 Piscataway, NJ 08855-0909 (908) 582-5800 (617) 821-7500 (908) 932-5253 (908) 582-3340 (FAX) (617) 821-4211 (FAX) (908) 932-5313 (FAX) rc@research.att.com david_forney@mcimail.com moayeri@winlab.rutgers.edu *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: HELMKE@vax1.rz.uni-regensburg.dbp.de First Announcement and Call for Papers INTERNATIONAL SYMPOSIUM ON THE MATHEMATICAL THEORY OF NETWORKS AND SYSTEMS 1993 August 2 - 6, 1993, Regensburg, Germany The International Symposium on the Mathematical Theory of Networks and Systems (MTNS) is held biannually since 1973. The symposium offers theoretical engineers, researchers and mathematicians in systems, control and circuit theory a platform to discuss recent developments, to exchange new ideas and to analyse 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 control, systems modelling, optimal control, filtering, robotics, VLSI, neural networks and control theoretic aspects of artificial intelligence. The scientific program of the symposium consists of plenary lectures by invited speakers, parallel lectures by invited speakers, mini courses, invited sessions and contributed lectures. Prospective authors should submit three copies of an unpublished paper in the English language by October 1, 1992, The length of the paper should not exceed 10 pages. 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 keywords. In the case of joint authorship, the first name mentioned will be used for all correspondence, unless otherwise requested. Proposals for invited sessions should also be submitted by October 1, 1992. An invited session normally comprises 3 - 5 lectures of 25 minutes duration, but other arrangements are possible. The proposal should contain the title of each lecture as well as the name, affiliation, address, fax-number, e-mail address and telephone number of each proposed speaker and of the organizer(s). In addition, a one page abstract of each lecture is required. Papers and proposals for invited sessions should be sent to MTNS 93, U. Helmke, Department of Mathematics, Regensburg University, 8400 Regensburg, Germany, Fax-No.: +49 941 943-2305, e-mail: Helmke@vax1.rz.uni-regensburg.dbp.de. Requests for information should be sent to one of the chairmen (U. Helmke or R. Mennicken). Dates: October 1, 1992 Deadline for submission of papers and proposals for special sessions. February 1, 1993 Notification of acceptance of contributed papers and special sessions. April 1, 1993 One page abstract is due. August 2 - 6, 1993 Symposium Chairmen: Uwe Helmke Reinhard Mennicken Department of Mathematics, Regensburg University, 8400 Regensburg, Germany. Fax: +49 941 943-2305 Telex: 65658 unire d E-Mail: Helmke@vax1.rz.uni-regensburg.dbp.de Mennicken@vax1.rz.uni-regensburg.dbp.de *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: fliess@frese51.bitnet (Michel Fliess) NONLINEAR CONTROL SYSTEMS DESIGN SYMPOSIUM '92 24 -- 26 June 1992 BORDEAUX -- FRANCE For more information please contact: NOLCOS'92 -- c/o M. Fliess LSS -- ESE Plateau de Moulon F-91192 Gif-sur-Yvette cedex FRANCE Fax: (33)-(1)-69.41.30.60 E-mail: fliess@frese51.bitnet SCIENTIFIC PROGRAM 8:45-9:00 Opening Ceremony 9:10-10:00 Plenary Session `Recent Advances in the Stabilization Problem for Low Dimensional Systems' W.P. Dayawansa (USA) 10:00-10:30 Coffee break 10:30-12:10 Feedback Stabilization (Invited Session) WA1 Org. Chair.: E.D. Sontag (USA) - A. Bacciotti (I) `Stabilization with Respect to Noncompact Sets: Lyapunov Characterizations and Effect of Bounded Inputs' (I) E.D. Sontag (USA) - Yuandan Lin (USA) `Stabilization of Linear Systems with Bounded Controls' (I) H.J. Sussmann (USA) - Y. Yang (USA) `Linear Feedback and the Local, Global and Potential Global Stabilization of Cascade Systems' (I) A. Bacciotti (I) `Exponential Piecewise Smooth Stabilization of Driftless Nonlinear Systems with less Inputs than States: the Mobile Robot Example' (I) O.J. Sordalen (N) - C. Canudas de Wit (F) `Lyapunov Design of a Dynamic Output Feedback for Systems Linear in their Unmeasured State Components' (I) L. Praly (F) 10:30-12:10 Dynamical and Control Systems, I WA2 `Higher Order Approximate Feedback Linearization about a Manifold' Xu Zhigang (USA) - J. Hauser (USA) `The Normal Forms, Averaging and the Resonance Control of Nonlinear Dynamical Systems' M.A. Pinsky (USA) `On Control Sets and Feedback for Nonlinear Systems' F. Colonius (D) - W. Kliemann (USA) `Nonlinear Feedback Control of a Chaotic System' Wang Hua (USA) - Hsien-Chiarn Lee (USA) - E.H. Abed (USA) `Feedback Control of a Family of Nonlinear Hysteretic Systems' Hong Jiang (USA) - Sain M.K. (USA) - Sain P.M. (USA) 10:30-12:10 Applications, I WA3 `A Nonlinear Geometric Synthesis of Aerospace Plane Ascent Guidance Logic' K.D. Mease (USA) - M.A. van Buren (USA) `Control of Magnetically Centered Rotor in Nonlinear Operation' B. Caron (F) - A. Charara (F) `Nonlinear Control Law Resonant Converters' A. Hassan (F) - S. Bacha (F) - G. Bornard (F) - M. Brunello (F) `Stability Analysis and Control of a Rotating Stall' Der-Cherng Liaw (RC) - E.H. Abed (USA) `Fuzzy Control Applied of an Aircraft Engine' S.G. Hiesener (D) 10:30-12:10 Decoupling, Linearization and Model-Matching, I WA4 `On Output Decomposed Linearization' D. Cheng (CHINA) - T.J. Tarn (USA) - A. Isidori (I) `Approximation of Nonlinear Control Problems: A Geometric Approach' A.C. Ruiz (NL) - H. Nijmeijer (NL) `A differential Algebraic Approach to the Classical Right Model Matching Problem' J. Rudolph (D) `Further Results on Nonlinear Noninteracting Control with Stability via Dynamic State Feedback' S. Battilotti (I) `A Graph-Theoretic Approach for the Determination of the Structure at Infinity of Nonlinear Systems' F. Svaricek (D) Lunch 14:10-15:00 Plenary Session `Nonlinear H^\infty Control and Hamilton-Jacobi Inequalities' A.J. van der Schaft (NL) 15:00-15:30 Coffee break 15:30-17:10 Nonlinear and Adaptative Control of Electromechanical Systems (Invited Session) WP1 Org. Chair.: J. Chiasson (USA) - M. Bodson (USA) `Modelling the Effects of Magnetic Saturation on Electrical Machine Control Systems' (I) C.R. Sullivan (USA) - S.R. Sanders (USA) `Indirect Adaptative Nonlinear Control of Induction Motors' (I) R.R. Kadiyala (USA) `Nonlinear controllers for the Induction Motor' (I) M. Bodson (USA) - J. Chiasson (USA) `Decomposed Algorithms for Speed and Parameter Estimation in Induction Machines' (I) M. V\'elez-Reyes (USA) - G.C. Verghese (USA) `Nonlinear Feedback and Control Strategy of the Induction Motor' (I) Z. Krzeminski (PL) 15:30-16:50 Nonholonomic Systems (Invited Session) WP2 Org. Chair.: S.S. Sastry (USA) - H.J. Sussmann (USA) `Geometry of Non-Holonomic Extremals' (I) V. Jurdjevic (CDN) `Anholonomy in the Control of Kinematically Redundant Mechanisms with Flexible Components' (I) J. Baillieul (USA) `On the Computation of Minimal Bases for the Control Lie Algebra' (I) A. Bellaiche (F) - J.-P. Laumond (F) - J.-J. Risler (F) - S.S. Sastry (USA) `Stabilization and Tracking for Nonholonomic Control Systems Using Time-Varying State Feedback' (I) R.M. Murray (USA) - G. Walsh (USA) 15:30-17:10 Algebraic and Geometric Methods, I WP3 `A Linear Algebraic Framework for the Analysis of Discrete-Time Nonlinear Systems' J.W. Grizzle (USA) `Inversion Formula for Discrete-Time Systems' S. El Asmi (F) - M. Fliess (F) `On Rational State Space Realizations' K. Forsman (S) `A Differential Algebraic Setting for Analytic Nonlinear Systems' A.M. Perdon (I) - C.H. Moog (F) - G. Conte (I) `Lowering Inputs Derivative Orders in Generalized State Representations of Nonlinear Systems' E. Delaleau (F) 15:30-17:10 Recent Advances in Feedback Stabilization, I WP4 `On Passive Systems: from Linearity to Nonlinearity' A.C. Ruiz (NL) - R. Ortega (CDN) - H. Nijmeijer (NL) `Local Stabilization of Analytic Systems with n-1 Inputs' A. Iggidr (F) - J.C. Vivalda (F) `Using Saturation to Stabilize a Class of Single-input Partially Linear Composite Systems' A.R. Teel (USA) `Stabilization of Nonlinear two Dimensional Dystems: a Bilinear Approach' R. Chabour (F) - G. Sallet (F) - J.C. Vivalda (F) `Local Adaptative Stabilization of a First Order Nonlinear System without Lipschitz Assumptions' R. Moctezuma (F) - R. Lozano (F) Thursday, June 25th 8:30-9:20 Plenary Session `Some Results on Systems Combining Linearity and Saturations: Control, Observation, and Relations to ``Neural Nets''' E.D. Sontag (USA) 9:30-10:00 Coffee break 10:00-12:00 Nonlinear Estimation Techniques Applied to Industrial Process (Invited Session) TA1 Org. Chair.: J.P. Gauthier (F) - F. Deza (F) `Exact State Observer for a Class of Uncertain Nonlinear Systems' (I) G. Bastin (B) `ComputerAided Design Analysis of Nonlinear Observation Problems' (I) J. Birk (D) - M. Zeitz (D) `Application of a Nonlinear Observer to a Fluid Catalytic Cracker' (I) F. Mokrani (F) - L. Astuto (F) - D. Rakotoparra (F) `Nonlinear Output Feedback Control of a Free Radical Polymerization Reactor' (I) M. van Doolingh (F) - F. Viel (F) - D. Rakotoparra (F) - J.P. Gauthier (F) `Applied Nonlinear Estimation: Model Based and Model Free' (I) J.-J.E. Slotine (USA) `Observers for Infinite Dimensional Dissipative Bilinear systems' J.P. Gauthier (F) - Xu C.Z. (F) - A. Bounabat (MA) 10:00-11:40 Algebraic and Geometric Methods, II TA2 `Necessary Conditions for the Removal of Singularities with Dynamic State Feedback' G.L. Santosuosso (I) `Port-Controlled Hamiltonian Systems: Modelling Origins and System Theoretic Properties' B.M. Maschke (F) - A.J. van der Schaft (NL) `Implementation of a Nonlinear Realization Algorithm using AXIOM' F. Lamnabhi-Lagarrigue (F) - P.E. Crouch (USA) - D. Pinchon (F) `Sliding Control and Differential Algebra' H. Sira-Ramirez (YV) `Some Theoretical Problems in Effective Differential Algebra and their Relations to Control Theory' F. Ollivier (F) 10:00-11:40 Robust Control TA3 `Backstepping Design of Robust Controllers for a Class of Nonlinear Systems' R.A. Freeman (USA) - P.V. Kokotovic (USA) `Approximate Matching of Nonlinear Systems via Nonlinear H^\infty Methods' L. Guzzella (CH) - A. Isidori (I) `Adaptative Control of a Class of Nonlinear Systems via the Robust Control Approach' F. Delli Priscoli (I) `Output Feedback Control of a Class of Nonlinear Systems' R. Marino (I) - P. Tomei (I) `Robust Control Design Combining Binary and Variable Structure Techniques' C. Bonivento (I) - A. Nersisian (RUSSIA) - A. Tonielli (I) - R. Zanasi (I) 10:00-11:40 Viability Approach to Control and Artificial Intelligence (Invited Session) TA4 Org. Chair.: J.-P. Aubin (F) - H. Frankowska (F) `Target Problems for Control Systems and Differential Games' (I) M. Quincampoix (F) `Numerical Approximation of Solution of Differential Inclusion with Linear State Constraints' (I) P. Saint-Pierre (F) `Feedback Controls as Solutions to Systems of Partial Differential Inclusions' (I) J.-P. Aubin (F) - H. Frankowska (F) `Neural Network Learning rules for Non Linear System Control: Application to Autonomous Underwater Vehicules Control' (I) N. Seube (F) `Qualitative Simulation of Replicators Systems' (I) O. Dordan (F) Lunch 14:10-15:00 Plenary Session `A Dynamical System Approach to Control' F. Colonius (D) - W. Kliemann (USA) 15:00-15:30 Coffee break 15:30-17:10 Control of Non-Holonomic Systems (Invited Session) TP1 Org. Chair.: V. Jurdjevic (CDN) `Optimal Control of Mechanical Systems with Nonholonomic Constraints' (I) A.M. Bloch (USA) - P.E. Crouch (USA) `Carnot-Carath\'eodory Metric' (I) I. Kupka (CDN) `Topics in Subriemannian Geometry' (I) R. Montgomery (USA) `Optimal Control and Piecewise Smooth Feedback for some Nonholonomic Systems' (I) H.J. Sussmann (USA) `Sinusoids for Steering Controllable Systems' (I) S.S. Sastry (USA) 15:30-17:10 Generalized State Space Systems (Invited Session) TP2 Org. Chair.: S. Diop (F) - J. L\'evine (F) `Linearization of Differential Systems around an Equilibrium' (I) J.C. Willems (NL) - A.J. van der Schaft (NL) `Nonholonomic Systems under Static and Dynamic Feedback' (I) B. Jakubczyk (PL) `Generalized State Space Descriptions and Digital Implementation' (I) S.T. Glad (S) `On Realization Theory of Generalized State Space Systems' (I) S. Diop (F) `On Differentially Flat Nonlinear Systems' (I) M. Fliess (F) - J. L\'evine (F) - P. Martin (F) - P. Rouchon (F) 15:30-17:10 Recent Advances in Feedback Stabilization, II TP3 `A Remark on the Design of Time-Varying Stabilizing Feedback Laws for Controllable Systems without Drift' J.M. Coron (F) - J.B. Pomet (F) `Some Remarks about Periodic Feedback Stabilization' R. Sepulchre (B) - G. Campion (B) - V. Wertz (B) `Convex Stabilization of Nonlinear Systems' E. Kappos (GB) `On Stabilization of Triangular Systems' R. Chabour (F) - A. Ferfera (F) `Stabilization of Decentralized Nonlinear Systems' Han Zheng-Zhi (CHINA) - Gao Feng (CHINA) - Zhang Zhong-Jun (CHINA) 15:30-17:10 Dynamical and Control Systems, II TP4 `Vibrational Control of Nonlinear Time LAG Systems with Arbitrarily Large but Bounded Delays' B. Lehman (USA) - J. Bentsman (USA) `Controller Design for a Nonlinear Distributed Parametter System via a Collocation Approximation' M.T. Nihtil\"a (SF) - N. Tali-Maamar (F) - J.P. Babary (F) `On the Control of Singularly Perturbed Nonlinear Systems' J.P. Barbot (F) - N. Pantalos (F) - S. Monaco (I) - D. Normand-Cyrot (F) `Sliding-mode Control for Nonlinear Singularly Perturbed Systems' G. Silva (MEX) - J. Alvarez (MEX) - E. Aranda (MEX) `On Supervision Reduction in the Control of Discrete Event Dynamical Systems' S. Di Gennaro (I) - S. Monaco (I) Friday, June 26th 9:00-9:50 Plenary Session `Dynamical Discontinuous Feedback Control of Nonlinear Systems' H. Sira-Ramirez (YV) 9:50-10:20 Coffee break 10:20-12:00 Dynamic Feedback in Nonlinear Systems (Invited Session) FA1 Org. Chair.: B. Jakubczyk (PL) - W. Respondek (PL) `Links between Local Controllability and Local Continuous Stabilization' (I) J.M. Coron (F) `Strong Dynamic Input-Output Decoupling: from Linearity to Nonlinearity' (I) H.J.C. Huijberts (NL) - H. Nijmeijer (NL) `An Algebraic Interpretation of the Structure Algorithm with an Application to Feedback Decoupling' (I) E. Delaleau (F) - M. Fliess (F) `Intrisic Singularities of Dynamic Extension' (I) W. Respondek (PL) `On Control Branchings in Systems with Degenerate Linearization' (I) A.N. Shoshitaishvili (RUSSIA) 10:20-12:00 Robotics and Mechanicals Systems FA2 `Robust Control of Mechanical Systems: An Experimental Study' B. de Jager (NL) `Attitude Control of Articuled Flexible Spacecraft' H.G. Kwatny (USA) - W.H. Bennett (USA) - M.-J. Baek (USA) - G.L. Blankenship (USA) `Path Following and Stabilization of a Mobile Robot' O.J. Sordalen (N) - C. Canudas de Wit (F) `A Physically Realizable PID Controller for the Robust Stabilization of SISO Nonlinear Systems' A. Tornamb\`e (I) - P. Valigi (I) `Nonlinear Control Laws for a 2 Flexible Link Robot: Comparison of Applicability Domains' C. Chevallereau (F) - Y. Aoustin (F) 10:20-12:00 Controllability and Optimal Control FA3 `Numerical Methods for Optimal Control Problems with Input Control and State Inequality Constraints' R. Pytlak (GB) `A New Type of Sufficient Optimality Conditions for a Nonlinear Constrained Optimal Control Problem' G. Stefani (I) - P. Zezza (I) `Sufficient Optimality Condition for Pontryagin Extremals' A.V. Sarychev (D) `Local Controllabillity for Families of Diffeomorphisms' A.A. Agrachev (RUSSIA) - R.V. Gamkrelidze (RUSSIA) `Design of Optimal Nonlinear Digital Controllers by Bellman-Lyapunov Method' V.F. Kudin (UKRA) 10:20-12:00 Decoupling, Linearization and Model-Matching, II FA4 `Asymptotic and Exact Model Matching for Nonlinear Systems' M.D. DiBenedetto (I) - J.W. Grizzle (USA) `Static Decoupling of Nonlinear Systems' P. S. P. da Silva (BR) `On the Decoupling by Dynamic Feedback of Nonlinear Affine Smooth Systems' P. S. P. da Silva (BR) `Nonlinear Predictive Control Using Volterra Series Models' T. Kirnbauer (A) - H.P. J\"orgl (A) `Model Matching of Nonlinear Discrete Time Systems in the Presence of Unmesurable Disturbances' U. Kotta (ESTONIA) Lunch 14:10-15:00 Plenary Session `Remarks on some Applications of Nonlinear Control Techniques to Chemical Processes' P. Rouchon (F) 15:00-15:30 Coffee break 15:30-17:30 Nonlinear Observers an Model-Matching (Invited Session) FP1 Org. Chair.: A.J. Krener (USA) - C.I. Byrnes (USA) `Moving Horizon Observers' (I) H. Michalska (GB) - D.Q. Mayne (USA) `Dynamic Forms and Their Applications to Control' (I) G. Meyer (USA) `Observer Design in the Tracking Control Problem of Robots' H. Berghuis (NL) - H. Nijmeijer (NL) - P. L\"ohnberg (NL) `Robust and Adaptative Model Reference Control' (I) M.D. DiBenedetto (I) - S.S. Sastry (USA) `The Construction of Optimal Nonlinear Model Reference Controllers' (I) A.J. Krener (USA) `To be announced' (I) C.I. Byrnes (USA) 15:30-17:10 Algebraic Computing in Nonlinear Systems Theory (Invited Session) FP2 Org. Chair.: P.E. Crouch (USA) - F. Lamnabhi-Lagarrigue (F) `Implementing Ritt's Algorithm of Differential Algebra' (I) S.T. Glad (S) `On Observability and Identifiability Theory' (I) S. Diop (F) - S. Kribs (F) `Rule-Based Selection of Nonlinear Observer Design Methods' J. Birk (D) - J. Schaffner (D) - M. Zeitz (D) `Motion Planing by Piecewise Constant or Polynomial Inputs' (I) G. Jacob (F) `Differential Equations and Combinatorics' (I) P. Leroux (CDN) - Martin A. (F) - X.G. Viennot (F) `Combinatorics of Realization of Nilpotent Control Systems' (I) M. Kawski (USA) 15:30-17:10 Recent Advances in Feedback Stabilization, III FP3 `Stabilization of Nonlinear Systems by Using Integrators' J. Tsinias (GR) `Smooth Stabilizing Time-Varing Control Laws for a Class of Nonlinear Systems. Application to Mobile Robots' J.M. Coron (F) - B. d'Andr\'ea-Novel (F) `Inverse of Lyapunov's second Theorem for Mesurable Functions' L. Rosier (F) `Sliding Modes: the Case of Multivariable Systems Nonlinear in the Inputs' G. Bornard (F) - A. Hassan (F) `Liapunov functions and Stability Criteria for Nonlinear Systems with Multiple Critical Eingenvalues' Fu Jyun-Horng (USA) 15:30-17:30 Applications, II FP4 `Structure Diagram Analysis and Design of Nonlinear Observers' H. Hahn (D) - H.J. Sommer (D) `Adaptative Control of Simple Nonlinear Stochastic Systems: Simulation Results' B. Portier (F) - G. Oppenheim (F) `Optimal Crone Control of a Tractor Hitch System' P. Lanusse (F) - A. Oustaloup (F) - C. Ceyral (F) - M. Nouillant (F) `Application of Nonlinear Adaptive Controller to Pressure Regulation' A. Bouhal (F) - E. Richard (F) - S. Scarvada (F) - D. Thomasset (F) `Input-Output Inversion and Gain Scheduling for an Aircraft Model' S. El Asmi (F) - E. Delaleau (F) - M. Fliess (F) `Model Creation using Experimental Design Theory' R. Muszynsky (PL) NOLCOS'92 Nonlinear Control Systems Design Symposium 24---26 June 1992 BORDEAUX, FRANCE REGISTRATION FORM Complete and mail this Form to ADERA ICIN 92 B. P. 48 33166 SAINT MEDARD EN JALLES CEDEX FRANCE Phone (33) 56 70 68 56 - Fax (33) 56 95 98 83 FAMILY NAME: First name: Affiliation: Address: Zip code: City: Country: Phone: Fax: Telex: Registration fees (including Proceedings and lunches): before May, 10th 1992; after May, 10th 1992 University Members FF 2000 FF 2500 Companies FF 3500 FF 4100 Banquet Wine Ceremony FF 250 FF 300FF Folk Music Accompanying persons 500 FF 600FF (Wine Tasting + Banquet + Bus Transporation) TOTAL: ADERA (in French Francs, i.e. FF) or by bank transfer (in French Francs) to BNP Saint-M\'edard-en-Jalles - France Account number 30004/00736/00020015795-52 Please send a copy of the bank transfer with the name of the participant. On payment by international transfer, please pay through SWIFT. Or by MASTER/VISA/EUROCARD. Credit Cards (Please cross out). EXPIRING ON Date Signature NOLCOS'92 Nonlinear Control Systems Design Symposium 24---26 June 1992 BORDEAUX, FRANCE HOTEL REGISTRATION FORM To be returned before May 20th, 1992 to BORDEAUX CONGRES SERVICE. Palais des Congr\`es 33300 Bordeaux-Lac, France. Tel: (33) 56 50 84 49 - Fax: (33) 56 43 17 76 - Telex: 540519F FAMILY NAME: First name: Affiliation: Address: Zip code: City: Country: Phone: Fax: Telex: Accompanied by person(s) I wish to receive reduction vouchers: SNCF AIR INTER ACCOMODATION (approximate 1992 prices for Bordeaux-Lac) HOTEL CATEGORY SINGLE or DOUBLE ROOM BREAKFAST 4 ****FF 525 FF 65 3 ***FF 425 FF 48 2 **FF 255/280 FF 30 I reserve a single room Category 4 3 2; double room near Palais des Congr\`es or Down town (15 min. by car) for the following nights: June 23 to 24 June 24 to 25 June 25 to 26 June 26 to 27 I enclose a compulsary advance payment of FF 380 per reservation (FF 300 transferred to the hotel and FF 80 for the fees) by cheque made out to BCS or by Credit Cards: VISA EUROCARD MASTER CARD AMERICAN EXPRESS Expiring on No reservation will be made without the requested payment. Request will be satisfied in order of arrival DATE: SIGNATURE: GENERAL INFORMATION: This registration form must be returned to BORDEAUX CONGRES SERVICE with the payement before May 20th. After this date, booking will be made according to vacancies. Cancellations in writing only to BCS before June 10th, refund less FF 80 for fees. After June 10th no refund. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: Jean-Arcady Meyer Conference Announcement and Call For Papers FROM ANIMALS TO ANIMATS Second International Conference on Simulation of Adaptive Behavior (SAB92) Ilikai Hotel Honolulu, Hawaii, December 7-11, 1992 This conference is the successor to SAB90 - which was held in Paris in September, 1990. Its object is to bring together researchers in ethology, psychology, ecology, cybernetics, artificial intelligence, robotics, and related fields so as to further our understanding of the behaviors and underlying mechanisms that allow animals and, potentially, robots to adapt and survive in uncertain environments. The conference will focus particularly on simulation models in order to help characterize and compare various organizational principles or architectures capable of inducing adaptive behavior in real or artificial animals. Contributions treating any of the following topics from the perspective of adaptive behavior will receive special emphasis. Individual and collective behavior Autonomous robots Neural correlates of behavior Hierarchical and parallel organizations Perception and motor control Emergent structures and behaviors Motivation and emotion Problem solving and planning Action selection and behavioral Goal directed behavior sequences Neural networks and classifier systems Ontogeny, learning and evolution Characterization of environments Internal world models Applied adaptive behavior and cognitive processes Submission Instructions Authors are requested to send two copies (hard copy only) of a full paper to each of the Conference co-chairs (Meyer, Roitblat, & Wilson). Papers should not exceed 10 pages (excluding the title page), with 1 inch margins all around, and no smaller than 10 pt (12 pitch) type (Times Roman preferred). Each paper must include a title page containing the following: (1) Full names, postal addresses, phone numbers, email addresses (if available), and fax numbers for each author, (2) A 100-200 word abstract, (3) The topic area(s) in which the paper could be reviewed (see list above). Camera ready versions of the papers will be required after acceptance. Computer, video, and robotic demonstrations are also invited. Please contact Herbert Roitblat to make arrangements for demonstrations. Other program proposals will also be considered. Conference committee Conference Chair Jean-Arcady MEYER Groupe de Bioinformatique URA686.Ecole Normale Superieure 46 rue d'Ulm 75230 Paris Cedex 05 France e-mail: meyer@wotan.ens.fr meyer@frulm63.bitnet Herbert ROITBLAT Department of Psychology University of Hawaii at Manoa 2430 Campus Road Honolulu, HI 96822 USA email: roitblat@uhunix.bitnet, roitblat@uhunix.uhcc.hawaii.edu Stewart WILSON The Rowland Institute for Science 100 Cambridge Parkway Cambridge, MA 02142 USA e-mail: wilson@smith.rowland.org Organizing Committee S. Gagnon, H. Harley, D. Helweg, M. Hoffhines, and local arrangements G. Losey, P. Moore, P. Nachtigall, E. Reese Program Committee A. Berthoz, France M. Bitterman, USA L. Booker, USA R. Brooks, USA P. Colgan, Canada J. Delius, Germany S. Goss, Belgium L. Steels, Belgium R. Sutton, USA F. Toates, UK S. Tsuji, Japan W. Uttal, USA D. Waltz, USA Important Dates JUL 15, 1992 Submissions must be received by the organizers SEP 1, 1992 Deadline for early registration OCT 1, 1992 Notification of acceptance or rejection NOV 7, 1992 Deadline for regular registration NOV 15, 1992 Camera ready revised versions due DEC 7-11, 1992 Conference dates For further information, contact Jean-Arcady MEYER (email addresses given above) *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by Aurel Lazar APPLIED PROBABILITY DAY COLUMBIA UNIVERSITY NEW YORK CITY FRIDAY APRIL 10, 1992 9:30 AM---5:00PM SPEAKERS Joel E. Cohen, Rockefeller University: Random Graphs in Biology Richard T. Durrett, Cornell University: Particle System Models of Ecosystem Dynamics Frank P. Kelly, Cambridge University: Network Routing Charles M. Newman, Courant Institute: Maximum Path Lengths for Random Task Graphs Lawrence A. Shepp, AT&T Bell Labs: Some Problems in Applied Probability William D. Sudderth, University of Minnesota:Approximation Theorems and Algorithms in Gambling Theory and Stochastic Games Organizing Committee Iannis Karatzas, Statistics Karl Sigman and David Yao, Industrial Engineering and Operations Research Sid Browne and Awi Federgruen, Graduate School of Business Aurel Lazar, Electrical Engineering Schedule 8:30-9:30 On-site registration and check in. 9:30-9:45 Opening remarks; Professor David H. Auston (Dean of the School of Engineering and Applied Science) Morning session Chairman: Professor J. Michael Steele (Department of Statistics, University of Pennsylvania) 9:45-10:30 Joel E. Cohen 10:30-11:15 William D. Sudderth 11:15-11:45 COFFEE BREAK 11:45-12:30 Frank P. Kelly 12:30-2:00 LUNCH Afternoon session Chairman: Dr. Debasis Mitra (AT&T Bell Labs) 2:00-2:45 Richard T. Durrett 2:45-3:30 Charles M. Newman 3:30-4:00 COFFEE BREAK 4:00-4:45 Lawrence A. Shepp 4:45--5:30 DISCUSSION and Wine and Cheese LOCATION OF CONFERENCE: 15th floor of the International Affairs Building in the Kellog Conference Center; on the corner of Amsterdam Avenue and West 118th Street. Hotels: The Milburn Hotel (242 West 76th Street between West End Ave. and Broadway) (Phone: (212) 362-1006; FAX:(212)721-5476) is a reasonably priced and conveniently located hotel (within a 10 minute Taxi or subway ride to Columbia university (Broadway at 116th Steet). $78.00 per night using Columbia University discout (So make sure you mention the Applied Probability Day). Location of Columbia University: Upper West Side of Manhattan: Main entrance on 116th Street and Broadway. There is a subway stop at this location using the No.1 or No.9 on the Broadway-7th Ave. local line (red in color). For other hotel suggestions(etc.) please call the Dept. of IEOR (212) 854-2941. REGISTRATION Applied Probability Day Columbia University Friday, April 10, 1992 Before March 25: $25.00 ($15.00 Students) On-Site Registration $35.00 ($20.00 Students) Name: Title and Affiliation: Address: email address (we prefer to acknowledge receipt of your registration form via email): To register, make check payable to CAP and send with registration form to: Center for Applied Probability 322 S.W. Mudd Building, 500 West 120th Street Columbia University NY, NY 10025-6699 email: cap@ieor.columbia.edu *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by Farshad Khorrami, Polytechnic University. CALL FOR PAPERS IEEE Regional Control Conference July 24-25, 1992 Sponsored by: IEEE Control System Society Hosted by: The School of Electrical Engineering & Computer Science Polytechnic University, Brooklyn, NY An IEEE Regional Control Conference will be held at Polytechnic University, Brooklyn, NY. The Conference will be devoted to generating interest from the control and automation community within the tri-state area. This regional conference is the first one subsidized by Control System Society (CSS) and will be held on two days (Friday and Saturday). Through the subsidy of CSS, the registration fee (including a copy of proceedings and two lunches) for this conference is minimal for participating members ($60) and especially students ($10). Papers in all related areas and especially with applications are highly encouraged. Authors should submit 4 copies of a one page summary by May 7, 1992 to the Program Chairman, Prof. J. Rastegar, State University of New York at Stony Brook, Department of Mechanical Engineering, Stony Brook, NY 11794-2300 (Phone: (516) 632-8314). For further information or to propose a special session, contact the General Chairman, Prof. Farshad Khorrami, Polytechnic University, School of Electrical Engineering & Computer Science, Six Metrotech Center, 333 Jay Street, Brooklyn, NY 11201 (phone: (718) 260-3227; fax: (718) 260-3227; email: khorrami@puee1.poly.edu). *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by Ken Hunt: 1992 IEEE International Symposium on INTELLIGENT CONTROL 11-13 August 1992 The Forte Crest (Albany) Hotel Bothwell Street Glasgow Scotland Sponsored by the IEEE Control Systems Society The 7th IEEE International Symposium on Intelligent Control (ISIC-92) will be held in Europe. This is the first time the event moves outside the US. The theme for ISIC-92 is "Learning in Control". The topics coverered in the meeting include: * Intelligent Control for Process * Intelligent Manufacturing Systems Systems * Knowledge-Based Automation * Machine Learned Control * Fuzzy Control * Neural Network Controllers * CAD and Interactive Graphics * Perception for Task Control * Space, Underwater and Teleoperated * Multisensor Fusion Robots * Qualitative Modelling * Hypermedia Design Tools REGISTER NOW (Reduced fee for registration before 14 July 1992) ADVANCE PROGRAMME AND REGISTRATION Dr Ken Hunt Mechanical Engineering Glasgow University Glasgow G12 8QQ Scotland, UK Phone: +41 339 8855 (ext. 4406,4349) Fax: +41 330 4343 Email: ken@uk.ac.gla.eng.ctrl *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by Wilson J. Rugh A new textbook by Wilson J. Rugh currently is in production at Prentice Hall, with a stock date of June 8, 1992. The Table of Contents and (most of) the Preface are given below. LINEAR SYSTEM THEORY A Graduate Course MATHEMATICAL NOTATION AND REVIEW Vectors Matrices Quadratic Forms Matrix Calculus Convergence Laplace Transform Exercises Notes STATE EQUATION REPRESENTATION Examples Linearization State Equation Implementation Exercises Notes STATE EQUATION SOLUTION Existence Uniqueness Complete Solution Exercises Notes TRANSITION MATRIX PROPERTIES Two Special Cases General Properties Variable Changes Exercises Notes TWO IMPORTANT CASES Constant Case Periodic Case Exercises Notes INTERNAL STABILITY Uniform Stability Uniform Exponential Stability Uniform Asymptotic Stability Lyapunov Transformations Exercises Notes LYAPUNOV STABILITY CRITERIA Introduction Uniform Stability Uniform Exponential Stability Instability Time-Invariant Case Exercises Notes ADDITIONAL STABILITY CRITERIA Eigenvalue Conditions Perturbation Results Slowly-Varying Systems Exercises Notes CONTROLLABILITY AND OBSERVABILITY Controllability Observability Exercises Notes REALIZABILITY Formulation Realizability Minimal Realization Special Cases Transfer Function Realizability Exercises Notes MINIMAL REALIZATION Assumptions Time-Varying Realizations Time-Invariant Realizations Realization from Markov Parameters Exercises Notes INPUT-OUTPUT STABILITY Uniform Bounded-Input Bounded Output Stability Relation to Uniform Exponential Stability Time-Invariant Case Exercises Notes CONTROLLER AND OBSERVER FORMS Controllability Controller Form Observability Observer Form Exercises Notes LINEAR FEEDBACK Effects of Feedback State Feedback Stabilization Eigenvalue Assignment Noninteracting Control Exercises Notes STATE OBSERVATION Observers Output Feedback Stabilization0 Time-Invariant Case Reduced-Dimension Observers A Servomechanism Problem Exercises Notes POLYNOMIAL FRACTION DESCRIPTION Right Polynomial Fractions Left Polynomial Fractions Column and Row Degrees Exercises Notes POLYNOMIAL FRACTION APPLICATIONS Minimal Realization Poles and Zeros State Feedback Exercises Notes GEOMETRIC THEORY Subspaces Invariant Subspaces Controlled Invariant Subspaces Controllability Subspaces Stabilizability and Detectability Exercises Notes APPLICATIONS OF GEOMETRIC THEORY Disturbance Decoupling Disturbance Decoupling with Eigenvalue Assignment Noninteracting Control Maximal Controlled Invariant Subspace Computation Exercises Notes AUTHOR INDEX SUBJECT INDEX PREFACE A course on linear system theory at the first-year graduate level typically is a second course on linear state equations for some students, a first course for a few, and somewhere between for the majority. It is the course where students from a variety of backgrounds begin to acquire the tools used in the research literature on linear system and control theory. This book is my notion of what such a course should be. The core material is the theory of time-varying linear systems, with frequent specialization to the time-invariant case. Additional material, included for flexibility in the curriculum, explores refinements and extensions, many confined to time-invariant linear systems. Motivation for presenting linear system theory in the time-varying context is at least threefold. First, the development provides an excellent review of the time-invariant case, both in the remarkable similarity of the theories and in the perspective provided by specialization. Second, much of the research literature in linear system theory treats the time-varying case - for generality, and because time-varying linear system theory plays an important role in other areas, for example nonlinear system theory. Finally, of course, the theory is directly relevant when a physical system is described by a linear state equation with time-varying coefficients. Technical development of the material is careful, even rigorous, but not fancy. The presentation is self-contained, and proceeds step-by-step from a modest mathematical base. I have tried to minimize terminology, choose default assumptions that avoid fussy technicalities, and employ a clean, simple notation. These features are intended to maximize clarity and render the theory accessible to beginning graduate students. Over 250 exercises are included, most applying or extending the theory rather than posing routine calculations. All exercises in Chapter 1 are used in subsequent material. Aside from Chapter 1, results of exercises are used infrequently in the presentation, at least until the later chapters. But linear system theory is not a spectator sport, and the exercises are an integral and important part of the book. Though the Muse insists that linear systems be described in linear sentences, I demur. However the prose intentionally is lean to not becloud the theory. For those seeking elaboration and congenial discussion, a Notes section in each chapter indicates further developments and alternative formulations. These notes are entry points to the literature rather than balanced reviews of the harvest of so many research efforts over the years. The organization of the book is linear, with adjustments as shown on the Chapter Planning Chart to provide flexibility in topic selection. Chapter 1 through Chapter 12 contain core material on time-varying linear systems, with Chapter 8 (Additional Stability Results) and Chapter 11 (Minimal Realization) optional. Depending on preparation of the students, it might be desirable to review the mathematics in Chapter 1 as needed rather than at the outset. Chapter 13 (Controller and Observer Forms) contains material necessary for subsequent chapters on the time-invariant case, though results for time-varying systems in Chapter 14 (State Feedback) and Chapter 15 (State Observation) are independent. Optional topics for time-invariant systems in Chapters 16 - 19 are the polynomial fraction description, which exhibits the detailed structure of the transfer function representation for multi-input, multi-output systems, and the geometric description of the fine structure of linear state equations. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: flewis@arrirs03.uta.edu (Frank Lewis) NEW BOOK Title: Applied Optimal Control and Estimation: Digital Design and Implementation Author: F. L. Lewis Publisher: Prentice-Hall (TI Digital Signal Processing Series) A new textbook for a graduate course on Digital Control and Estimation; contains many design and simulation examples, including programs in FORTRAN V. Covers controller and estimator implementation on the TI TMS320 C25 Digital Signal Processor, including implementation examples. No prerequisites in optimal control and estimation will be needed, as they are covered. Therefore, could be used as well for a combined course on Optimal Control and Kalman Filtering. A disk is available from the author. CONTENTS PART I- INTRODUCTION 1. Introduction to Modern Control Theory 1.1 A Brief History of Automatic Control 1.2 The Philosophy of Classical Control 1.3 The Philosophy of Modern Control 2. Review of State-Variable Systems 2.1 Continuous-Time Systems 2.2 Discrete-Time Systems 2.3 System Properties 2.4 Realization and Canonical Forms 2.5 Feedback Control PART II- CONTINUOUS-TIME CONTROL 3. Optimal Control of Continuous-Time Systems 3.1 The General Continuous-Time Optimal Control Problem 3.2 Continuous-Time Linear Quadratic Regulator 3.3 Steady-State and Suboptimal Control 3.4 Minimum-Time and Constrained-Input Design 4. Output-Feedback Design 4.1 Linear Quadratic Regulator With Output Feedback 4.2 Tracking a Reference Input 4.3 Tracking By Regulator Redesign 4.4 Command Generator Tracker 4.5 Explicit Model-Following Design PART III- DIGITAL CONTROL 5. Digital Control By Continuous Controller Redesign 5.1 Simulation of Digital Controllers 5.2 Discretization of Continuous Controllers 5.3 Sampling, Hold Devices, and Computation Delay 5.4 Minimum-Time Control 6. Implementation of Digital Controllers 6.1 Actuator Saturation and Windup 6.2 Quantization and Roundoff 6.3 Overflow and Scaling 6.4 Controller Realization Structures 6.5 Digital Signal Processor Subroutines 6.6 Digital Signal Processor Control Implementation Example 7. Digital Control By Direct Discrete-Time Design 7.1 Discretization of Continuous Systems 7.2 Discretization of the Performance Index 7.3 Practical Considerations in Sampling 7.4 Discrete Design Techniques PART IV- FREQUENCY-DOMAIN TECHNIQUES 8. Robust Design 8.1 Multivariable Loop Gain and Sensitivity 8.2 Multivariable Bode Plot 8.3 Frequency-Domain Performance Specifications 8.4 Robust Output-Feedback Design PART V- OBSERVERS, FILTERS, AND REGULATORS 9. State Estimators 9.1 Output-Injection Observer Design 9.2 Reduced-Order Observers 9.3 Discrete Kalman Filter 9.4 Digital Filtering of Continuous-Time Systems 9.5 Continuous Kalman Filter 10. Multivariable Dynamic Compensator Design 10.1 Linear-Quadratic-Gaussian Design 10.2 LQG/Loop-Transfer Recovery Robust Design Appendix A. Computer Software Appendix B. Review of Matrix Algebra Appendix C. Review of Probability Theory Appendix D. The Texas Instruments TMS320C25 Digital Signal Processor *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: J.M.Maciejowski (jmm@eng.cam.ac.uk) ERRATA and MATLAB .M FILES for the book `MULTIVARIABLE FEEDBACK DESIGN' (J.M.Maciejowski, Addison-Wesley, 1989). A list of known mistakes, misprints, etc is available in the SCAD database, in the form of a Latex file. Also a number of people have told me that they cannot reproduce the Design Example given in Chapter 6 (H-infinity). The SCAD database contains 3 Matlab .m files (chap6ex.m, hinfgd.m, and mylqr.m) which go through that example. To run them you need the Control Toolbox and the Multivariable Frequency Domain Toolbox, but if you haven't got the MFD Toolbox it will only take 30 minutes or so to change the file to run without it. If you have the Mu-tools Toolbox then you can optionally use that to solve the design problem. These files can be found in SCAD as follows: The files are in the subdirectory pub/scad/books/maciejowski Latex file: errata.latex contains a list of errata MatLab files: chap6ex.m Matlab script file for H-infinity Design Example, Chapter 6 hinfgd.m This function implements the Glover-Doyle algorithm for H-infinity synthesis, following section 6.7 mylqr.m Linear quadratic regulator design for continuous systems *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: maccluer@nemo.mth.msu.edu (Charles R Maccluer) POSITION WANTED My friend and occasional collaborator, Archil Gulisashvili , is seeking a visiting academic position in the US. This charming and talented erstwhile soviet mathematician is presently interviewing around the country. His area is approximation Theory, harmonic analysis, signal analysis, and linear chaotic systems. He is a senior member of the Georgian Academy of Science, Tbilisi. He is fluent in English, Spanish, Russian, Polish, and Georgian. To obtain a CV and list of publications please FAX 410-653-0819. For references please call E.M. Stein, Princeton, 609-258-6463, or R. Wheeden, Rutgers, 908-932-3487, or B. Korenblum, SUNY Albany, 518-442-4631. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by: irp@evans.ee.adfa.oz.au (Ian Richard Petersen) POSTDOCTORAL POSITION AVAILABLE RESEARCH ASSOCIATE (Level 1) Department of Electrical Engineering University College, University of New South Wales Australian Defence Force Academy Ref: Z200.058.302 This position is funded by the Australian Research Council under the grant: "Optimal Robust Control based on a Theory of Uncertain Linear Systems" and will involve carrying out research in conjunction with Associate Professor I.R. Petersen. The successful applicant will be appointed for a period of two years. Applicants should have a Ph.D in Engineering or Mathematics with a specialisation in Control Theory. They should also have a demonstrated ability to carry out research in the areas of Robust Control, H infinity Optimal Control and the Control of Uncertain Systems. Salary: In the range $Aust 31,178 - $Aust 34,584 (1$Aust ~= $US 0.75) Further information can be obtained from Ian Petersen on email irp@evans.ee.adfa.oz.au or FAX 61 6 2688443. Applications close 24 April 1992. Written applications (quoting reference number) should be sent to Asst. College Secretary (Personnel) University College, University of New South Wales, Australian Defence Force Academy, Northcott Drive, Canberra ACT 2600. Alternatively, applications can be sent directly to Ian Petersen via email or FAX. Applications should include the names, addresses, and email or FAX numbers of two referees. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** Contributed by Rene Collier The Institute for Perception Research/IPO in Eindhoven (The Netherlands) invites applications for a research position in DIGITAL SIGNAL PROCESSING as applied to SPEECH. The succesful candidate should have relevant academic qualifications in the general field of signal processing, preferably combined with specific experience in speech research. A doctor's degree is advisable, but no prerequisite. The candidate will become a member of the Institute's multi-disciplinary Hearing and Speech group, whose research program includes Sound Perception, Speech Generation, Human Speech Recognition and Speech Processing. In the latter area the activities are directed towards improving techniques for the automatic extraction of phonetically relevant parameters from the speech signal; evaluating the perceptual importance of acoustic features through manipulation and resynthesis; developing research tools and creating innovative applications in the domain of speech coding and text-to-speech conversion; and evaluating the perceptual quality of coded and synthesized speech. The succesful candidate will receive an appointment either in a tenure-track position with the University or as a researcher with Philips Electronics. IPO is a foundation in which two main sponsors participate: the Eindhoven University of Technology and Philips Research Eindhoven. The general research program of the Institute focuses on the processing of perceptual information, in interaction with hardware and software. The main research groups are: Hearing and Speech, Vision and Reading, Cognition and Communication, and Computational Linguistics. The Institute employs some 75 people, about 20 of whom are students of IPO's graduate school "Perception and Technology". Request for further information and applications should be sent to: Prof. Rene COLLIER Head of the Hearing and Speech Group IPO PO Box 513 5600 MB Eindhoven, The Netherlands Phone: +31 40 77 38 73 Fax: +31 40 77 38 76 E-mail: collier@heiipo5.bitnet *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** 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: cacsdletters ============ This new directory contains backissues of OPEN CACSD, is the electronic newsletter of the IFAC/IEEE-CSS Working Group on Guidelines for Open Computer-Aided Control Systems Design (CACSD) Software, edited by Chris Jobling. So far there are 3 newsletters. shellscripts ============ This new directory contains shellscripts which users may find convenient to use when using SCAD. Present contents: inbox shows the content of the directory scadinputs, contributed by E. Sontag. books subdirectory `maciejoskwi' contains new information ===== about the book Multivariable Feedback Design by J.M. Maciejowski in particular it contains the following files: errata.latex contains a list of errata chap6ex.m Matlab script file for H-infinity Design Example, Chapter 6 hinfgd.m This function implements the Glover-Doyle algorithm for H-infinity synthesis, following section 6.7 mylqr.m Linear quadratic regulator design for continuous systems eletters: ========= - eletter issues: 48, 49 preprints: ========== The following reports from the Systems and Control Center at Rutgers can now be found in the subdirectory preprints/syconreports sycon-92-01.ps.Z [92-01] "Systems combining linearity and saturations, and relations to 'neural nets'," Eduardo D.\ Sontag, Mar. 92 (i+21pp) This paper deals with control systems consisting of linearly interconnected integrators (or delay lines) and scalar nonlinearities. For linear systems with saturating sensors, we mention results on observability and minimal realization. When saturations appear in actuators, questions of control become of interest, and we describe stabilization techniques. If there are feedback loops containing the nonlinearities, "recurrent neural nets" are obtained, and we discuss various issues relating to their computational power and identifiability of parameters. Parts of the work surveyed here were jointly pursued with Francesca Albertini, Renee Schwarzschild, Hava Siegelmann, Hector Sussmann, and Yudi Yang. This is an expanded version of the paper for the plenary talk with the same title that will appear in the "Preprints of the IFAC Conf. Nonlinear Control," Bordeaux, June 1992. sycon-92-02.latex [92-01] "Optimal control and almost analytic feedback for some nonholonomic systems," Hector J. Sussmann, Mar. 92 (12pp) One possible approach to do path planning for nonholonomic systems is to use optimal control. It is intuitively clear that optimal control should give rise to solutions of the path planning problem that are in feedback form, and one can expect that the resulting feedback control laws will be "piecewise smooth" or "piecewise analytic" in some sense. Here we focus on the weaker property of "analyticity on a large dense set" (ALDS), and explain how such a property is related to the problem of the structure of the optimal trajectories and, in particular, to the existence of "proper subanalytic sufficient families for optimality" that are made of a bounded number of pieces depending on finitely many parameters. The existence of such sufficient families can be proved in a number of cases using techniques from differential-geometric control theory. This is illustrated by briefly discussing the example of the "Reeds-Shepp car." *********** 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: maccluer@nemo.mth.msu.edu (Charles R Maccluer) CONTROL SEMINAR AT MICHIGAN STATE UNIVERSITY Again I remind the readers that if you are in the vicinity, please consider sspeaking at our interdisciplinary Systems, Control, and Signal Processing Seminar here at Michigan State University. Meetings are Thursday afternoon. Email either Hassan Khalil (EE) khalil@frith.egr.msu.edu, Philip FitzSimons (ME) fitzsimo@frith.egr.msu.edu, or C.R. MacCluer (Mth) maccluer@mth.msu.edu . The response from the last posting was gratifying. Many nice visits were enjoyed by all. *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.** End of Eletter 50, March 1992