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ON THE POWER OF TRAPS AND DIVERSIONS IN A DOCUMENT PREPARATION LANGUAGE

SOFTWARE-PRACTICE & EXPERIENCE 1982年第12期12卷 1119-1131页

作者： WITTEN, IH BONHAM, M STRONG, E Man-Machine Systems Laboratory Department of Computer Science The University of Calgary 2500 University Drive NW Calgary Canada T2N 1N4

This note illustrates the power of software interrupts (traps) and text diversions in document preparation languages by considering three difficult problems in typesetting: figure placement; setting text in arbitrary shapes; and balancing final columns in multi-column layout. The solution of each of these in the nroff document preparation system is discussed, and an Appendix gives the nroff macros which accomplish the tasks.

关键词： Document preparation languages Text processing Software interrupts Nroff Macros

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The message is the medium: Multiprocess structuring of an interactive paint program 82

The message is the medium: Multiprocess structuring of an in...

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Proceedings of the 9th annual conference on computer graphics and interactive techniques

作者： Richard J. Beach John C. Beatty Kellogg S. Booth Darlene A. Plebon Eugene L. Fiume Computer Graphics Laboratory Department of Computer Science University of Waterloo Waterloo Ontario Canada N2L 3G1 Computer Systems Research Group Department of Computer Science University of Toronto Toronto Ontario Canada M5S 1A7

ISBN: (纸本)9780897910767

An innovative design for an interactive paint program has been developed based on multiple processes and message passing. Traditional paint programs combine interrupt-driven support of a graphical input device, such as a mouse or tablet, with the coloring of pixels in a raster display. We advocate a different design methodology which is illustrated in our implementation. The multiple processes and message passing primitives provided by some real-time operating systems encourage the design of parallel-program architectures and anthropomorphic programming structures, analogous to artist procedures and the metaphors of *** Thoth operating system was used to experiment with such an anthropomorphic design. Thoth provides a hospitable environment in which to investigate the distribution of algorithms between software and microprogrammed hardware processes, the performance and responsiveness of a multiple-process interactive program, and experimental user interfaces using an Ikonas 3000 frame *** paint program consists of processes which handle the graphics tablet, track an iconic cursor, paint a selection of brushes, fill regions of the image, draw lines, and implement the user interface. Some processes have been implemented both in software and microcode.

关键词： Administrator

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Preface

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Lecture Notes in computer science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 1982年 126 LNCS卷 III-IV页

作者： Flynn, Michael J. Harris, Neville R. McCarthy, Daniel P. Computer Systems Laboratory Stanford University StanfordCA94305 United States Department of Computer Science School of Engineering Trinity College University of Dublin Dublin 2 Ireland

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SHIPBOARD MAIN BOILER AND FEED PUMP CONTROL-SYSTEM ONLINE ALIGNMENT VERIFICATION

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NAVAL ENGINEERS JOURNAL 1982年第6期94卷 39-46页

作者： BANHAM, JW ADAM, DJ James W. Banham:holds positions both as Director of the Machinery Automation Systems Department of the Naval Ship Systems Engineering Station and as Assistant Chairman of the Mechanical and Industrial Engineering Department of Drexel University's Evening College where he holds the rank of Adjunct Associate Professor. He is the author of a text on Numerical Methods Applications in Engineering. In addition to numerous technical papers he is also the author of the ISA film on Boiler Feedwater Control Systems. A registered professional engineer in the state of Pennsylvania Mr. Banham is co-author of a forthcoming handbook on preparing for the Professional Engineering Examination in mechanical engineering. Mr. Banham holds a bachelor of science degree in mechanical engineering from the Pennsylvania State University his graduate studies were taken at the University of Pennsylvania. He is currently a member of the American Society for Engineering Education and the Instrument Society of America. He served as a member of the ISA Education Committee from 1964 through 1973 and as a member of the ISA Power Plant Dynamics Committee since 1969. His service on the latter committee includes terms as Executive Secretary Vice-Chairman and Chairman. Among other honors Mr. Banham was the winner of the Naval Ship Engineering Center's first Technical Achievement Award (1963) Technical Publication Award (1974) and Equal Employment Opportunity Award (1978). He was also the recipient of Drexel University's Laura S. Campbell Award for Excellence in Teaching (1978). He has taught undergraduate courses in classical control theory numerical methods computer programming systems design and analysis and instrumentation. He also teaches systems theory and computer science in an EIT Review and heat transfer in a PE Review conducted by the Drexel University Department of Continuing Professional Education. Mr. David J. Adam:is a Project Engineer in the Naval Sea Systems Command (PMS301) Steam Propulsion Plant Improvement Program where he i

One of the most serious problems encountered in Naval steam plants following World War II was the unreliable performance of boiler and main feedpump pneumatic control systems. In addition to control component and system design deficiencies, these control systems suffered from inadequate methods to measure and adjust system alignment. This paper describes the development of a set of procedures for on-line alignment verification (OLV) of pneumatic main boiler and feedpump control systems. The procedures are designed for use by N avy control system technicians and, in addition to on-line alignment verification, provide guidance for troubleshooting and for performing system alignment. Procedure static checks measure steady state steaming performance and OLV procedure dynamic checks measure the ability of the boiler and control systems to respond to load changes. The paper describes typical control system characteristics that influence OLV procedure content and the supporting analysis that was used to establish alignment criteria ranges that satisfy both steady state and transient performance requirements. Also described is the alignment criteria tolerance analysis along with the steps involved in a typical OLV check procedure development. Descriptions of the various OLV checks, troubleshooting procedures and alignment procedures are provided. Typical shipboard implementation requirements are described and experience to date with the procedures is provided along with a status report on OLV procedure implementations.

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Approximate algorithms to derive exact solutions to systems of linear equations 2nd

Approximate algorithms to derive exact solutions to systems ...

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2nd International Symposium on Symbolic and Algebraic Manipulation, EUROSAM 1979

作者： Moenck, Robert T. Carter, John H. Versa Management Systems Ltd. 245 Yorkland Boulevard TorontoONM2J 1R1 Canada Department of Computer Science and Mathematics Atkinson College York University 4700 Keele Street DownsviewONM3J 1P3 Canada

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The computer as an artistic tool

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International Journal of Man-Machine Studies 1978年第3期10卷 251-256页

作者： Sveinson, Lynn Man-Machine Systems Laboratory Department of Computer Science University of Calgary Calgary Alberta T2N IN4 Canada

This paper is based on the belief that science and art are not necessarily “two cultures”, but can be combined successfully as a result of their inescapable influences upon each other. A brief justification of this position is presented with some emphasis on artistic investigations using the computer. The machine's merits are viewed not only as a means of mass communication or of producing pictures, but also as a potential modelbuilder for the formalization of aesthetic concepts. The remainder of the paper details recent and current research on such uses of the machine—in particular the use of a computer as an artistic tool. The work completed was concerned with the possibilities inherent in using computer plotted output to solve problems similar to those which an artist solves in manual drawings or paintings, particularly a problem known as “readability of surface”. An account of the program parameters and methods that were used to produce the plotted drawings is given and the results are discussed. Current research is then outlined. This new work involves an attempt to algorithmitize basic design concepts, working firstly with the idea of “balance”. The concepts and the methods to be used in experimenting with balance are explained. It is important to note that all the work is being carried out in co-operation with a professional artist. The hope is that the artist will be stimulated, by the many alternatives provided by the computer, in the exploration of design. Furthermore, it is hoped that eventually it will prove possible to formulate clearly some of the traditionally vague design concepts. The results to date are encouraging in their support of the interrelationship between science and art. © 1978, Academic Press Inc. (London) Limited. All rights reserved.

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A program structure for event-based speech synthesis by rules within a flexible segmental framework

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International Journal of Man-Machine Studies 1978年第3期10卷 285-294页

作者： Hill, David R. Man-Machine Systems Laboratory Department of Computer Science University Calgary Alberta T2N IN4 Canada

A program structure based on recently developed techniques for operating system simulation has the required flexibility for use as a speech synthesis algorithm research framework. Synthesis is possible with less rigid time and frequency-component structure than with simpler schemes, and it allows much of the speech knowledge required for synthesis to be removed from the main driving structure and embodied as tables and procedures that may easily be modified or replaced. The program also meets real-time operation and memory-size constraints. The resulting view of speech structure, at the acoustic-segmental level, is that of time-ordered, perceptually relevant events, and is related to that used in the author's work on automatic speech pattern discrimination. The flexibility of the scheme for synthesis, and the excellent mutual independence of the many processes, with differing objectives, that must be run for realistic approximations to real speech variation, have proved a welcome release from earlier problems. © 1978, Academic Press Inc. (London) Limited. All rights reserved.

关键词： Artificial Speech computer Programs Man Machine systems systems DevelopmentSpeech Synthesis

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Abstracts

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Environmental Management 1977年第1期1卷 67-96页

作者： Frankenfeld, John W. Schulz, Wolfgang McMurty, George J. Petersen, Gary W. May, G. A. Hering, F. S. Schwartz, J. I. Heywood, J. B. Chigier, N. A. Grohse, E. W. Walker, J. D. Colwell, R. R. Petrakis, L. Pergament, H. S. Thorpe, R. D. Schoepf, Richard W. Krzyczkowski, Roman Henneman, Suzanne S. Hudson, Charles L. Putnam, Evelyn S. Thiesen, Donna J. Parks, G. A. McCarty, Perry L. Leckie, J. O. Schrumpf, Barry J. Simonson, G. H. Paine, D. P. Lawrence, R. D. Pyott, W. T. Leh, M. Elders, W. Combs, J. Caplen, T. Harrison, F. L. Wong, K. M. Heft., R. E. Charnell, Robert L. Lehmann, Edward J. Mallon, Lawrence G. Hatfield, Cecile Adams, Gerald H. Johanning, James Talvitie, Antti Noll, Kenneth E. Miller, Terry Smiarowski, Joseph F. Willis, Cleve E. Foster, John H. Schlesinger, Benjamin Daetz, Douglas Lear, Donald U. Smith, Mona F. Hundemann, Audrey S. Crockett, Pernell W. Werner, Kirk G. Carroll, Thomas E. Maase, David L. Genco, Joseph E. Ifeadi, Christopher N. Lowman, F. G. Christensen, S. W. Van Winkle, W. Mattice, J. S. Harrison, Elizabeth A. Barker, James C. Chesness, Jerry L. Smith, Ralph E. Shaheeen, Donald G. Raney, R. Keith Borton, T. Wezernak, C. T. Raney, R. K. Sherwani, Jabbor K. Moreau, David H. Eisenberg, Norman A. Lynch, Cornelius J. Breeding, Roger J. Johnson, J. D. Foster, K. E. Mouat, D. A. Clark, R. Hyden, John William Owen, Wilfred Bayfield, Neil G. Barrow, Graham C. Stolz, Stephanie B. Wienckowski, Louis A. Brown, Betram S. Keyfitz, Nathan Wilson, W. L. Newman, Peter W. G. Bammi, Deepak Bammi, Dalip Goddard, James E. Chisholm, Tony Walsh, Cliff Brennan, Geoffrey Thompson, K. S. Richardson, R. Jensen, Clayton E. Brown, Dail W. Mirabito, John A. Cowing, Thomas G. Binghamton, Suny Siehl, George H. Albrecht, O. W. Alexander, Ariel Barde, Jean -Philippe Darby, William P. McMichael, Francis Clay Dunlap, Robert W. Muckleston, Keith W. Frankenhoff, Charles A. Giulini, Lorenzo T. Wyatt, T. Black, Peter E. Keating, William Thomas Leonard, M. E. Fisher, E. L. Brunelle, M. F. Dickinson, J. E. Pethig, Rudiger Clapham Exxon Research & Engineering Co. Linden Government Research Lab Coast Guard Washington D.C. Department of Transportation Washington D.C. Office For Remote Sensing of Earth Resources. NASA Earth Resources Survey Program Pennsylvania State University Washington D.C. Department of the Navy Washington D.C. Cambridge. Dept. of Mechanical Engineering Massachusetts Inst. of Technology USA Huntsville. School of Graduate Studies and Research Alabama Univ. USA Dept. of Microbiology. Office of Naval Research Maryland Univ. Arlington Research and Development Co. Pittsburgh AeroChem Research Labs. Inc. Princeton Dept. of the Interior Office of Library Services. Bibliographic Series (Final) Washington D.C. Interplan Corp. Santa Barbara Urban Mass Transportation Adm. Washington D.C. Naval Underwater Systems Center Newport Calif. Mercury Project. National Science Found Stanford Univ Washington D.C. Div. of Advanced Environmental Research & Tech. USA Corvallis. NASA Earth Resources Survey Program Oregon State Univ. Washington D.C. Riverside. Inst. of Geophysics and Planetary Physics National Science Foundation California Univ. Washington D.C. Livermore Lawrence Livermore Lab. California Univ. USA Atlantic Oceanographic and Meteorological Labs. National Oceanic and Atmospheric Administration Miami National Technical Information Service Springfield Miami Univ. Coral Gables School of Law National Oceanic and Atmospheric Administration Rockville National Academy of Sciences Office of Sea Grant Washington D. C. School of Law National Oceanic and Atmospheric Administration Office of Sea Grant. Rockville Norman. Dept. of Civil Engineering and Environmental Science. Urban Mass Transportation Administration Oklahoma Univ. Washington D. C. Knoxville.Dept. of Civil Engineering. Federal Highway Administration Tennessee Univ. Washington D. C. Amherst.Water Resources Research Center. Office of Water Research and Technology Massachusetts Univ. Washington D. C. Calif. Dept. of Industria

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computerized concrete mix proportioning for large projects

Computerized concrete mix proportioning for large projects

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Impact of computers on the Practice of Structural Engineering in Concrete Symposium at the 1970 ACI Fall Convention

作者： Malhotra, V.M. Hibbert, P.D. Systems and Programming Division Computer Science Centre Department of Energy Mines and Resources OttawaON Canada Construction Materials Section Mines Branch Department of Energy Mines and Resources OttawaON Canada

This paper describes the use of a digital computer in the design of concrete mixes for large construction projects. The salient features of a program called CONMIX are outlined, the nature of input data and output arc discussed, and a flow chart of the program is included. The basis of the program is the absolute volume method, using various design tables as given in the latest revision of ACI Standard, "Recommended Practice for Selecting Proportions for Normal-Weight Concrete (ACI 613-54)." The paper is concluded by illustrating the use of the program with three typical examples, and by discussing its field applications. © 1972 American Concrete Institute. All rights reserved.

关键词： Quality control

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Stiffness Modeling of Parallel Robots 1

Stiffness Modeling of Parallel Robots

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丛书名： Parallel Robots: Theory and Applications

1000年

作者： Alexandr Klimchik Anatol Pashkevich Damien Chablat

ISBN: (数字)9783031763205

ISBN: (纸本)9783031763199;9783031763229

The book focuses on the stiffness modeling of serial and parallel manipulators It presents fundamentals and enhancements for Virtual Joint Modelling (VJM), Matrix Structural Analysis (MSA) and Finite Element Analysis (FEA). The described techniques consider complex kinematics with numerous passive joints, different types of loadings, including essential loadings leading to critical changes in the manipulator configurations, linear and non-linear stiffness analysis, conventional and non-linear compliance error compensation and stiffness parameters estimation from virtual experiments. Presented enhancement for the VJM integrates in the stiffness analysis external force/torque applied to the end-point, internal preloading in the joints, and auxiliary forces/torques applied to intermediate points. The proposed technique includes computing an equilibrium configuration corresponding to the external/internal loading and allows obtaining the full-scale non-linear force-deflection relation for any given workspace point. This enables the designer to evaluate critical forces that may provoke non-linear behaviours of the manipulators, such as sudden failure due to elastic instability (buckling). The presented enhancement to the MSA allows users to carry out stiffness analysis for serial underactuated structures and over-constrained ones with multiple closed loops. To increase the model accuracy of the VJM and MSA techniques a dedicated FEA-based stiffness model parameters identification technique is introduced in the book. It is based on the virtual experiments in the CAD/CAE environment and allows the VJM and MSA to achieve accuracy comparable with FEA, but it essentially reduces the computational effort, eliminating repetitive re-meshing through the workspace. All considered stiffness modelling techniques, kinematic particularities and loading conditions are illustrated with practical examples and related analysis.

关键词： Control, Robotics, Mechatronics Mechanical Engineering Civil Engineering

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