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International Conference on Biomedical Engineering and comput.r sci.nce (ICBECS)

作者： Deng-xu He Gui-qing Liu Coll. of Math. & Comput. Sci. Guangxi Univ. for Nat. Nanning China

Based on Chaotic Genetic Algorithm idea, this paper presents a new solution for the classic Knapsack Problem(KP). We introduce Chaos idea into Genetic Algorithm, adding the disturbance to help finding better solutions in the traditional Genetic Algorithm. Results of numerical tests show that it has high efficiency and the good ability of global optimization.

关键词： Chaos Genetic algorithms Biological cells Educational institutions math.matics comput.r sci.nce Resource management Testing Helium Stochastic processes

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On average P vs. average NP

On average P vs. average NP

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Annual Conference on Structure in Complexity Theory

作者： J. Wang J. Belanger Dept. of Math. & Comput. Sci. Wilkes Univ. Wilkes-Barre PA USA

Structures of polynomial-time comput.ble distributions and polynomial-time many-one reductions on randomized decision problems are investigated. The scope is widened from the most studied class DNP (distributional-NP) to the class ANP (average-NP), which consists of randomized decision problems accepted by nondeterministic Turing machines in average polynomial time. Results indicate that the structures of average-case complexity classes are very different from their counterparts in worst-case complexity due to the complex structures of probability distributions and distribution functions.< >

关键词： Polynomials Distributed comput.ng Probability distribution Search problems Complexity theory Turing machines NP-complete problem math.matics comput.r sci.nce Internet

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Entropy as a measure of database information 6

Entropy as a measure of database information

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6th Annual comput.r Security Applications Conference, ACSAC 1990

作者： Unger, E.A. Harn, L. Kumar, V. Comput. and Inf. Sci. Kansas State Univ. ManhattanKS United States Computer Science Telecommunications Program University of Missouri at Kansas City United States

ISBN: (纸本)0818621052

An estimate of the information a database contains and the quantification of the vulnerability of that database to compromise by inferential methods is discussed. Such a measure could be used to evaluate the deterrent value of extant protection methods and provide a measure of the potential for inferential compromise through the use of one of the known attack tools. The authors explore the use of the concept of entropy as defined for information by C.E. Shannon (1948;1951), for the purpose of quantifying information content in a database and develop a measure of vulnerability based on entropy. Use of the measure, when exact disclosure through the use of a tracker is anticipated, is characterized for both static and dynamic databases at design and operational time. © 1990 IEEE.

关键词： Entropy

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Ghost Process: a Sound Basis to Implement Process Duplication, Migration and Checkpoint/Restart in Linux Clusters

Ghost Process: a Sound Basis to Implement Process Duplicatio...

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International Symposium on Parallel and Distributed comput.ng

作者： J.-Y. Berthou C. Morin D. Margery R. Lottiaux G. Vallee Div. of Comput. Sci. & Math. Oak Ridge Nat. Lab. TN

Process management mechanisms (process duplication, migration and checkpoint/restart) are very useful for high performance and high availability in clustering systems. The single system image approach aims at providing a global process management service with mechanisms for process checkpoint, process migration and process duplication. In this context, a common mechanism for process virtualization is highly desirable but traditional operating systems do not provide such a mechanism. This paper presents a kernel service for process virtualization called ghost process, extending the Linux kernel. The ghost process mechanism has been implemented in the Kerrighed single system image based on Linux

关键词： Linux Kernel Government Resource management Operating systems Fault tolerance Checkpointing comput.r sci.nce math.matics Laboratories

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SYMMETRIZED KRONECKER PRODUCTS OF THE FUNDAMENTAL REPRESENTATION OF SP(N, R)

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JOURNAL OF PHYSICS A-math.MATICAL AND GENERAL 1990年第11期23卷 1909-1927页

作者： CARVALHO, MJ Dept. of Math. Phys. & Comput. Sci. Ryerson Polytech. Inst. Toronto Ont. Canada

The role played by S-function series in the character theory of the non-compact symplectic group Sp(n, R) is exploited to derive general formulae for the evaluation of symmetrised Kronecker products of the fundamental Sp(n, R) representation. Applications of the results to Sp(3, R) and their impact on the nuclear symplectic shell model are discussed for simple cases.

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Methodology for GPS Synchronization Evaluation with High Accuracy

Methodology for GPS Synchronization Evaluation with High Acc...

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IEEE Vehicular Technology Conference

作者： Zan Li Torsten Braun Desislava C. Dimitrova Inst. of Comput. Sci. & Appl. Math. Univ. of Bern Bern Switzerland

ISBN: (纸本)9781479980895

Clock synchronization in the order of nanoseconds is one of the critical factors for time-based localization. Currently used time synchronization methods are developed for the more relaxed needs of network operation. Their usability for positioning should be carefully evaluated. In this paper, we are particularly interested in GPS-based time synchronization. To judge its usability for localization we need a method that can evaluate the achieved time synchronization with nanosecond accuracy. Our method to evaluate the synchronization accuracy is inspired by signal processing algorithms and relies on fine-grain time information. The method is able to calculate the clock offset and skew between devices with nanosecond accuracy in real time. It was implemented using software defined radio technology. We demonstrate that GPS-based synchronization suffers from remaining clock offset in the range of a few hundred of nanoseconds but the clock skew is negligible. Finally, we determine a corresponding lower bound on the expected positioning error.

关键词： clock skew clock recovery Network operations Signal processing algorithms NANOSECOND Skew key factors

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A New Agent Oriented Model for AutoMotive comput.ng Platform

A New Agent Oriented Model for AutoMotive Computing Platform

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International Symposium on Intelligent Information Technology and Security Informatics, IITSI

作者： Chunyan Yu Dongyi Ye Minghui Wu Coll. of Math. & Comput. Sci. Fuzhou Univ. Fuzhou China Dept. of Comput. Sci. & Eng. Zhejiang Univ. City Coll. Hangzhou China

Automotive comput.ng platform is a prosperous research branch recently and a good and comprehensive model is the most important mission is this rising research field. This paper presented a new agent-oriented model for automotive comput.ng platform, which covers functional model involving several sub-platforms, framework model describing connection among all the sub-platforms and information flow model depicting a whole information process procedure from gathering to feedback control. Furthermore, this paper discussed all key technologies required to construct an agent-oriented model based automotive comput.ng platform, including agent technology, GPS and GIS technology, trunking communication technology.

关键词： Automotive engineering Intelligent vehicles Intelligent agent Automobiles Intelligent transportation systems Mobile comput.ng comput.r sci.nce Communication system control Intelligent sensors Navigation

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Multimode semiconductor lasers for adaptive self-mixing sensors

Multimode semiconductor lasers for adaptive self-mixing sens...

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IEEE Sensors

作者： F. Surre T. B. Pham Han Cheng Seat O. D. Bernal Sch. of Math. Comput. Sci. & Eng. City Univ. London London UK

ISBN: (纸本)9781479982042

Self-mixing or optical feedback interferometry sensors have been demonstrated as compact and versatile non-contact optical sensor for various applications. One issue, though, appears when the level of optical feedback is strong. When that occurs, detected signals are perturbed and critical information is lost. Current solutions to this problem add extra optical component, which makes the set-up more complex. We present a technique, based on multimode semiconductor lasers and a feedback control loop, that adjusts the laser regime (single mode or bi-mode) based on the estimated level of optical feedback without adding extra optical devices, therefore keeping the simplicity of self-mixing sensors. Experimental results demonstrate that no information is lost even when the feedback is strong.

关键词： Optical feedback Semiconductor lasers Sensors Self tuning feedback control feedback control loop Feedback PROBLEM SOLUTION Optical Component signal acquisition

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Towards Adaptation and Personalization in Task Based on Human-Robot Interaction

Towards Adaptation and Personalization in Task Based on Huma...

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IEEE Latin American Robotics Symposium, LARS

作者： Daniel C. Tozadore Joao P.H. Valentini Victor H.S. Rodrigues Fernando M.L. Vendrameto Rodrigo G. Zavarizz Roseli A.F. Romero Inst. of Math. & Comput. Sci. Universidade de Sao Paulo Sao Paulo SÃ£o Paulo BR Inst. of Math. & Comput. Sci. Universidade de Sao Paulo Sao Paulo SÃ£o Paulo BR

Social robots increase peoples curiosity and motivation in social and intellectual activities because people feel challenged to interact with machines and find out how smart they are. Such systems are being built to work in entertainment environments, homes, hotels and assistive tasks. However, a decrease in the user motivation and attention span is noticed after the robot loses its novelty. This paper describes a proposal of a dynamic user adaptation system applied to a humanoid robot as a framework to create activities and autonomously interact with the users, prolonging the interaction time. Machine Learning methods are used to detect and classify the verbal answers of the users and body signals to adapt the robot behavior. The system stores information of the users to personalize some dialogues during the activities, trying to simulate rapport building. A storytelling activity was programmed to test the proposed system. Experiments performed showed that the participants were able to perceive the robot's behavior adaptation and also the personalization impact along the interaction session.

关键词： Adaptation models Adaptive systems Face Task analysis Decision making Robot sensing systems

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Fast RNC and NC algorithms for finding a maximal set of paths with an application 2nd

Fast RNC and NC algorithms for finding a maximal set of path...

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Proceedings of the 1996 2nd Annual International Conference on comput.ng and Combinatorics, COCOON'96

作者： Uehara, Ryuhei Chen, Zhi-Zhong He, Xin Center for Inform. Sci. Tokyo Woman's Christian Univ. Suginami 167 Tokyo Japan Dept. of Math. Sci. Tokyo Denki Univ. Hatoyama 350-03 Saitama Japan Dept. of Comput. Sci. SUNY at Buffalo Buffalo 14260 NY United States

ISBN: (纸本)9783540613329

We present two parallel algorithms for finding a maximal set of paths in a given undirected graph. The former runs in O(log n) expected time with O(n + m) processors on a CRCW PRAM. The latter runs in O(log² n) time with O(Δ²(n + m)/log n) processors on an EREW PRAM. The results improve on the best previous ones and can also be extended to digraphs. We then use the results to design an NC approximation algorithm for a variation of the shortest superstring problem introduced by Jiang et al. The approximation algorithm achieves a compression ratio of 1/3+εfor any ε >0. © Springer-Verlag Berlin Heidelberg 1996.

关键词： Approximation algorithms

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