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Making a Low-dimensional Representation Suitable for Diverse Tasks

Connection sci.nce 1996年第2期8卷 205-205页

作者： Intrator, N. Edelman, S. School of Mathematical Sciences Sackler Faculty of Exact Sciences Tel Aviv University Tel Aviv 69978 Israel Dept. of Appl. Math. and Comp. Sci. Weizmann Institute of Science Rehovot 76100 Israel Inst. for Brain and Neural Systems Box 1843 Brown University Providence RI 02912 United States

We introduce a new approach to the training of classifiers for performance on multiple tasks. The proposed hybrid training method leads to improved generalization via a better low-dimensional representation of the problem space. The quality of the representation is assessed by embedding it in a two-dimensional space using multi-dimensional scaling, allowing a direct visualization of the results. The performance of the approach is demonstrated on a highly non-linear image classification task.

关键词： Imposing bias on neural networks Multiple-task training Transfer in neural networks

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Polymer current limiters: Affordable protection for the Navy's electrical and electronic comp.nents

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NAVAL ENGINEERS JOURNAL 1996年第4期108卷 31-34页

作者： Singer, C Dougal, R Duggal, A Palmer, K University of Maryland Electrical Systems Division Propuls. and Auxiliaries Syst. Dept. Naval Surface Warfare Center Annapolis MD United States Texas Tech. University Dept. of Elec. and Comp. Engineering University of South Carolina Massachusetts Inst. of Technology Gen. Elec. Corp. R. and D. Center Carnegie Mellon University Westinghouse Elec. Corp.'s Sci. T.

Electrical equipment aboard Navy ships is currently protected by current Limiting fuses which provide reliable protection against.high fault currents. Fuses, however, must be replaced after each fault event. While individual fuses are relatively inexpensive, the aggregate costs of replacing large numbers of them lie in the millions of dollars. Furthermore, the manpower and time required to replace blown fuses are also expensive. This has led us to investigate the use of modern current limiting elements to replace fuses. In the past, the excessive cost, size and weight of current limiters prohibited their widespread use. New studies show that the emerging polymer current limiter (PCL) technology will effectively limit fault currents while reducing life cycle costs. This advantage arises because of the self-resetting capability and inexpensive procurement costs characteristic of PCLs. The protection performance and the cost advantages of polymer current limiters are described here in the context of use with distribution and load equipment. We also outline the operating mechanism of PCLs and strategies for using PCLs to improve coordination between circuit breakers. Finally, an application of PCLs as protection for solid-state devices such as Silicon Controlled Rectifiers (SCR) and MOS Controlled Thyristors (MCT) is considered.

关键词： Limiters

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Least-squares algorithms for motion and shape recovery under perspective projection

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Journal of Information sci.nce and Engineering 1996年第1期12卷 1-1页

作者： Fuh, C.S. Maragos, P. Dept. of Comp. Sci. and Info. Eng. National Taiwan University Taipei Taiwan School of Electrical Engineering Georgia Institute of Technology Atlanta GA 30332 United States National Taiwan University Taipei Taiwan Pennsylvania State University University Park PA United States Harvard University Cambridge MA United States AT and T Bell Laboratories Natl. Technical University of Athens Greece Georgia Institute of Technology Atlanta GA United States Division of Applied Sciences Harvard University Department of Electrical Engineering Greek Inst. Lang. and Speech Proc. Sch. of Elec. and Comp. Engieering Georgia Tech.

This paper presents an algorithm for 3-D motion and shape recovery using two perspective views and their relative 2-D displacement field. The 2-D displacement vectors are estimated as parameters of a 2-D affine model that generalizes standard block matching by allowing affine shape deformations of image blocks and affine intensity transformations. The matching block size is effectively found via morphological size histograms. The parameters of the rigid body motion are estimated using a least-squares algorithm that requires solving a system of linear equations with rank three. Some stabilization of the recovered motion parameters under noise is achieved through a simple form of maximum a posteriori estimation. A multi-scale search in the parameter space is also used to improve accuracy without high comp.tational cost. Experiments on applying this algorithm to various real world image sequences demonstrate that it can estimate dense displacement fields and recover motion parameters and object shape with relatively small errors.

关键词： comp.ter vision Correspondence Motion analysis

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Progress report and discussion on the continuing activity on ASA’s role in noise and its control

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The Journal of the Acoustical Society of America 1996年第4_SUPPLEMENT期100卷 2746-2746页

作者： Louis C. Sutherland Masaru Koyasu Consultant in Acoust. 27803 Longhill Dr. Rancho Palos Verdes CA 90275‐3908 Dept. of Comp. Sci. Chiba Inst. of Technol. Tsudanuma 2‐17‐1 Narashino 275 Japan

This discussion meeting is being sponsored by the Technical Committee on Noise (TCN) to review progress made to date on actions initiated by the TCN. The results of the successful outreach seminar held in Indianapolis in 1996 May will be discussed, and topics for future seminars will be presented. The possibilities for a self‐administered hearing test in public places will be discussed, and the feasibility of such a program examined. Reprints have been obtained of articles based on papers presented at a special noise session held in Washington, DC on 1995 June 01. The session was titled Noise: State ofthe Art—Noise Effects andControl. Two thousand copies of a 64‐page booklet have been printed, and will be distributed by ASA to those interested in noise control. Cooperation with the ASA Standards Secretariat has resulted in an electronic version of the latest standards catalog with links to the abstracts of all standards, including noise standards. The information will be posted on the World Wide Web. The distribution of a floppy disk containing the same information will be discussed. Dr. Koyasu will also discuss some of the recent progress made in Japan in noise control activity.

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Benchmarking implementations of functional languages with 'Pseudoknot', a float-intensive benchmark

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Journal of Functional Programming 1996年第4期6卷 621-655页

作者： Hartel, Pieter H. Feeley, Marc Alt, Martin Augustsson, Lennart Baumann, Peter Beemster, Marcel Chailloux, Emmanuel Flood, Christine H. Grieskamp, Wolfgang Van Groningen, John H. G. Hammond, Kevin Hausman, Bogumil Ivory, Melody Y. Jones, Richard E. Kamperman, Jasper Lee, Peter Leroy, Xavier Lins, Rafael D. Loosemore, Sandra Röjemo, Niklas Serrano, Manuel Talpin, Jean-Pierre Thackray, Jon Thomas, Stephen Walters, Pum Weis, Pierre Wentworth, Peter Department of Computer Systems University of Amsterdam 1098 SJ Amsterdam Kruislaan 403 Netherlands Dept. d'Informatique et R.o. Université de Montréal Montréal Que. H3C 3J7 succursale centre-ville Canada Informatik Universität des Saarlandes 66041 Saarbrücken 11 Germany Department of Computer Systems Chalmers University of Technology 412 96 Göteborg Sweden Department of Computer Science University of Zurich 8057 Zurich Winterthurerstr. 190 Switzerland LIENS URA 1327 du CNRS Ecl. Normale Supérieure 75230 Paris Cédex 05 45 rue d'Ulm France Laboratory for Computer Science MIT Cambridge MA 02139 545 Technology Square United States Berlin University of Technology 10587 Berlin Franklinstr. 28-29 Germany Fac. of Math. and Computer Science Univ. of Nijmegen 6525 ED Nijmegen Toernooiveld 1 Netherlands Department of Computing Science Glasgow University Glasgow G12 8QQ 17 Ulybank Gardens United Kingdom Computer Science Lab. Box 1505 S-125 25 Älvsjö Sweden Computer Research Group Inst. for Sci. Computer Research Lawrence Livermore Natl. Laboratory Livermore CA 94550 P.O. Box 808 L-419 United States Department of Computer Science University of Kent at Canterbury Canterbury Kent CT2 7NF United Kingdom CWl 1098 SJ Amsterdam Kruislaan 413 Netherlands Department of Computer Science Carnegie Mellon University Pittsburgh PA 15213 5000 Forbes Avenue United States INRIA Rocquencourt Projet Cristal 78153 Le Chesnay B.P. 105 France Departamento de Informática Universidade Federal de Pernambuco Recife PE Brazil Department of Computer Science Yale University New Haven CT United States INRIA Rocquencourt Projet Icsla 78153 Le Chesnay B.P. 105 France Europ. Comp.-Indust. Research Centre D-81925 Munich Arabella Straße 17 Germany Harlequin Ltd. Barrington Hall Barrington Cambridge CB2 5RG United Kingdom Department of Computer Science University of Nottingham Nottingham NG7 2RD United Kingdom Department of Computer Science Rhodes University Grahamstown

Over 25 implementations of different functional languages are benchmarked using the same program, a floating-point intensive application taken from molecular biology. The principal aspects studied are comp.le time and execution time for the various implementations that were benchmarked. An important consideration is how the program can be modified and tuned to obtain maximal performance on each language implementation. With few exceptions, the comp.lers take a significant amount of time to comp.le this program, though most comp.lers were faster than the then current GNU C comp.ler (GCC version 2.5.8). comp.lers that generate C or Lisp are often slower than those that generate native code directly: the cost of comp.ling the intermediate form is normally a large fraction of the total comp.lation time. There is no clear distinction between the runtime performance of eager and lazy implementations when appropriate annotations are used: lazy implementations have clearly come of age when it comes to implementing largely strict applications, such as the Pseudoknot program. The speed of C can be approached by some implementations, but to achieve this performance, special measures such as strictness annotations are required by non-strict implementations. The benchmark results have to be interpreted with care. Firstly, a benchmark based on a single program cannot cover a wide spectrum of 'typical' applications. Secondly, the comp.lers vary in the kind and level of optimisations offered, so the effort required to obtain an optimal version of the program is similarly varied.

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Backorder Fuzzy Inventory Model

Backorder Fuzzy Inventory Model

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Joint Conference on Information sci.nces - Proceedings, Abstracts and Summaries '94

作者： Chen, Shan-Huo Wang, Chien-Chung Inst. of Shipping/Transp. Management National Taiwan Ocean University Keelung 20224 Taiwan Department of Computing University of Western Sydney Nepean NSW 2747 Australia Sch. of Comp. Sci. and Engineering University of New South Wales NSW 2052 Australia

In this paper, the fuzzy inventory model is discussed, especially in the case of permitting backorder under the fuzzy environment of fuzzy demand, fuzzy order cost, fuzzy inventory cost and fuzzy backorder cost. We use function principle, inst.ad of extension principle, to calculate the total fuzzy inventory cost. We also apply the median rule to find the optimal economic order quantity (EOQ) and shortage quantity.

关键词： Fuzzy sets

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ChemInform Abstract: Chromatographic Purification and Superpurification of Biologically Active comp.unds Using Heteroreticular and comp.site Ion Exchange Resins at Low Pressure

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ChemInform 1994年第1期25卷

作者： G. V. SAMSONOV O. A. PISAREV A. T. MELENEVSKY Inst. Macromol. Comp. Russian Acad. Sci. 199004 St. Petersburg Russia

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, p... 详细信息

关键词： applied chemistry, review general, theoretical studies separation and purification methods, chromatography

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ChemInform Abstract: Nucleophilic Substitution in the Allyl System of Codeine and Pseudocodeine in Their Reactions with Lithium Methyl‐ and Arylcyanocuprates. Crystal and Molecular Structure of 8α‐Phenyl‐ 6,7‐didehydro‐4,5α‐epoxy‐3‐methoxy‐17‐methylmorphinan and 6β ‐Phenyl‐7,8‐didehydro‐4,5α‐epoxy‐3‐methoxy‐17‐methylmorphinan.

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ChemInform 1994年第32期25卷

作者： V. N. KALININ I. L. BELYAKOVA V. V. KOBAK P. V. PETROVSKII A. I. YANOVSKY YU. T. STRUCHKOV A. N. Nesmeyanov Inst. Organoelement Comp. Russian Acad. Sci. 117813 Moswcow Russia

关键词： alkaloids substitution reactions

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ChemInform Abstract: Thermal Reactions of Hexafluoro‐1,3‐butadiene. Part 1. Primary Products and Their Thermal Transformations.

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ChemInform 1994年第13期25卷

作者： N. B. KAZMINA M. YU. ANTIPIN S. V. SEREDA YU. T. STRUCHKOV E. I. MYSOV L. A. LEITES A. N. Nesmeyanov Inst. Organoelement Comp. Russian Acad. Sci. 117813 Moscow Russia

关键词： halogen comp.unds (acyclic comp.unds) cyclobutane derivatives

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ChemInform Abstract: 1,2‐ and 1,4‐Addition Reactions of α‐Metallated (η6‐ Alkylarene)tricarbonylchromium comp.exes to Carbonyl comp.unds.

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ChemInform 1994年第33期25卷

作者： V. N. KALININ I. A. CHEREPANOV S. K. MOISEEV A. N. Nesmeyanov Inst. Organoelement Comp. Russian Acad. Sci. 117813 Moscow Russia

关键词： reactions of organo‐metal comp.unds alkylation, arylation, dealkylation, dearylation, C‐acylation, olefination

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