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2007 International Conference on Machine Learning and Cybernetics(IEEE第六届机器学习与控制论国际会议)

作者： LEI WU YA-LAN YE LEI PENG School of Applied Mathematics University of Electronic Science and Technology of China Chengdu 61 School of Computer Science and Engineering University of Electronic Science and Technology of China

This paper proposes a novel evolutionary immune network used for data clustering *** immune mechanism, partially inspired by self-organized mapping theory, is introduced to adjust the antibody's quantity and improve clustering *** order to guarantee clustering quality for highly non-linear distributed inputs, Kernel method is adopted to increase the clustering *** order to enhance direct descriptions about the clustering's center and result in input space, a new distance dimension instead of Euclidean distance is introduced by adopting Kernel substitution method while the training procedure is still running in input *** results are also provided toverify the algorithm's feasibility, clustering performance and anti-noise capability.

关键词： Immune network SOM Kernel method Data clustering

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Routing with Load Balancing in Ad Hoc Network: A Mobile Agent Approach

Routing with Load Balancing in Ad Hoc Network: A Mobile Agen...

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International Conference on computer and Information Science (ACIS)

作者： Neeraj Nehra R. B. Patel V. K. Bhat School of Computer Science and Engineering SMVDU University Katra Jammu and Kashmir India Computer Engineering Department M. M. Engineering College Ambala Haryana India School of Applied Physics and Mathematics SMVDU University Katra Jammu and Kashmir India

An ad hoc wireless mobile network is an infrastructure-less network that has no fixed routes; instead, all nodes are capable of movement and can be connected dynamically in an arbitrary manner. In order to facilitate communication of mobile nodes that may not be within the wireless range of each other, an efficient routing protocol is needed to discover routes between nodes so that messages may be delivered in a timely manner. Therefore in this paper, we propose routing with load balancing using mobile agent (RLBMA). We use the concept of mobile agent (MA) for route discovery and balance the traffic load on the route. This MA selects the disjoint (alternate) path called active path set (APS) for reliable transmission to avoid congestion. RLBMA provides topology updation and path maintenance also. A comprehensive simulation study was conducted to evaluate the performance of the proposed scheme. Performance results shows that MA approach outperforms existing ad hoc routing protocols in terms of packet delivery fraction, average end-to-end delay and normalized routing load.

关键词： Load management Ad hoc networks Mobile agents Routing protocols Mobile communication Samarium Mobile computing Telecommunication traffic Delay Mobile ad hoc networks

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Two-dimensional discrete Ginzburg-Landau solitons

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Physical Review A 2007年第4期76卷 043839-043839页

作者： Nikolaos K. Efremidis Demetrios N. Christodoulides Kyriakos Hizanidis Department of Applied Mathematics University of Crete 71409 Heraklion Crete Greece College of Optics and Photonics University of Central Florida Orlando Florida 32813 USA School of Electrical and Computer Engineering National Technical University of Athens Athens 15773 Greece

We study the two-dimensional discrete Ginzburg-Landau equation. In the linear limit, the dispersion and gain curves as well as the diffraction pattern are determined analytically. In the nonlinear case, families of two-dimensional discrete solitons are found numerically as well as approximately in the high-confinement limit. The instability dynamics are analyzed by direct simulations.

关键词： SEMICONDUCTOR-LASER ARRAYS WAVE-GUIDE ARRAYS EQUATION LATTICES STABILITY SYSTEMS

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Predicting secret keys via branch prediction

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Cryptographers Track at the RSA Conference, CT-RSA 2007

作者： Acıiçmez, Onur Koç, Çetin Kaya Seifert, Jean-Pierre School of Electrical Engineering and Computer Science Oregon State University CorvallisOR97331 United States Information Security Research Center Istanbul Commerce University Eminönü Istanbul34112 Turkey Applied Security Research Group The Center for Computational Mathematics and Scientific Computation Faculty of Science and Science Education University of Haifa Haifa31905 Israel Institute for Computer Science University of Innsbruck Innsbruck6020 Austria

ISBN: (纸本)9783540693277

This paper announces a new software side-channel attack — enabled by the branch prediction capability common to all modern high-performance CPUs. The penalty paid (extra clock cycles) for a mispredicted branch can be used for cryptanalysis of cryptographic primitives that employ a data-dependent program flow. Analogous to the recently described cache-based side-channel attacks our attacks also allow an unprivileged process to attack other processes running in parallel on the same processor, despite sophisticated partitioning methods such as memory protection, sandboxing or even virtualization. In this paper, we will discuss several such attacks for the example of RSA, and experimentally show their applicability to real systems, such as OpenSSL and Linux. Moreover, we will also demonstrate the strength of the branch prediction side-channel attack by rendering the obvious countermeasure in this context (Montgomery Multiplication with dummy-reduction) as useless. Although the deeper consequences of the latter result make the task of writing an efficient and secure modular exponentiation (or scalar multiplication on an elliptic curve) a challenging task, we will eventually suggest some countermeasures to mitigate branch prediction side-channel attacks. © Springer-Verlag Berlin Heidelberg 2007.

关键词： Side channel attack

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A Peer-to-Peer Scheme to Discover and Select QoS Enhanced Alternate Paths

A Peer-to-Peer Scheme to Discover and Select QoS Enhanced Al...

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International Conference on Communication Systems Software and Middleware (COMSWARE)

作者： Thierry Rakotoarivelo Patrick Senac Aruna Seneviratne Michel Diaz LAAS-CNRS Toulouse France National ICT Australia (NICTA) Alexandria Australia School of Electrical Engineering and Telecommunications University of New South Wales Sydney Australia Department of Applied Mathematics and Computer Engineering ENSICA Toulouse France

Increasing number of communication softwares are built on distributed architectures based on the Peer-to-Peer (P2P) model, such as Skype [1], and PeerCast [2]. This model provides several significant benefits, such as deployment scalability, resilience to single points of failure, communication cost sharing, and anonymity. In a former contribution, we proposed an unstructured Super-Peer architecture (SPAD) that further uses the P2P paradigm to provide enhanced Quality of Service (QoS) between two users of these communication softwares. SPAD allows the discovery and use of composite alternate end-to-end paths that experience better delay than the path given by the default IP routing mechanisms. This paper extends SPAD's capabilities to multi-QoS constrained alternate-paths. It presents two extensions: i) the capability to discover alternate paths with better packet-loss and/or delay, ii) multiple schemes to select among the discovered paths the ones that best meets the requirements of the users.

关键词： Peer to peer computing Quality of service Australia Streaming media computer architecture Scalability Costs Delay Routing Network servers

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A Unified Pseudospectral Framework for Nonlinear Controller and Observer Design

A Unified Pseudospectral Framework for Nonlinear Controller ...

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American Control Conference (ACC)

作者： Qi Gong I. Michael Ross Wei Kang Department of Elec. & Computer Engineering University of Technology San Antonio USA Department of Mechanical and AstronauticalEngineering Naval Postgraduate School Monterrey CA USA Department of Applied Mathematics Naval Postgraduate School Monterrey CA USA

As a result of significant progress in pseudospectral methods for real-time dynamic optimization, it has become apparent in recent years that it is possible to present a unified framework for both controller and observer design. In this paper, we present such an approach for nonlinear systems. The method can be applied to a wide variety of nonlinear systems. The convergence of the proposed computational method is guaranteed under verifiable conditions. Several numerical examples are also presented to demonstrate the efficiency of the proposed computational framework.

关键词： Control systems Optimal control Nonlinear control systems Nonlinear systems Costs Design methodology Software algorithms Optimization methods Convergence Cities and towns

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Successive Overrelaxation for Mamdani Fuzzy Systems

Successive Overrelaxation for Mamdani Fuzzy Systems

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Qianfeng Cai Zhifeng Hao Xiaowei Yang College of Applied Mathematics Guangdong University of Technology China College of Computer Science and Engineering South China University of Technology China School of Mathematical Science South China University of Technology Guangzhou China

To design a Mamdani fuzzy system with good generalization ability in high dimensional feature space, a novel learning algorithm based on the structural risk minimization (SRM) inductive principle is presented in this paper. Firstly, the parameter estimation of a Mamdani fuzzy system is converted to a quadratic optimization problem. Then, a versatile iterative method, successive overrelaxation, is proposed. In the proposed algorithm, the fuzzy kernel generated by premise membership functions is proved to be a Mercer kernel. Numerical experiments show that the presented algorithm improves the generalization ability of Mamdani fuzzy systems.

关键词： Fuzzy systems Kernel Iterative algorithms Support vector machines Fuzzy neural networks Space technology Fuzzy reasoning Data mining Clustering algorithms Neural networks

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Three-Dimensional Vortex Solitons in Self-Defocusing Media

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Physical Review Letters 2007年第11期98卷 113901-113901页

作者： Nikolaos K. Efremidis Kyriakos Hizanidis Boris A. Malomed Paolo Di Trapani Department of Applied Mathematics University of Crete 71409 Heraklion Crete Greece School of Electrical and Computer Engineering National Technical University of Athens Athens 15773 Greece Department of Interdisciplinary Studies Faculty of Engineering Tel Aviv University Tel Aviv 69978 Israel Istituto Nazionale per la Fisica della Materia and Department of Physical and Mathematical Sciences University of Insubria Via Valleggio 11 22100 Como Italy

We demonstrate that families of vortex solitons are possible in a bidispersive three-dimensional nonlinear Schrödinger equation. These solutions can be considered as extensions of two-dimensional dark vortex solitons which, along the third dimension, remain localized due to the interplay between dispersion and nonlinearity. Such vortex solitons can be observed in optical media with normal dispersion, normal diffraction, and defocusing nonlinearity.

关键词： Solitons

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Solving multi-contingency transient stability constrained optimal power flow problems with an improved GA

Solving multi-contingency transient stability constrained op...

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Congress on Evolutionary Computation

作者： K.Y. Chan K.W. Chan S.H. Ling H.H.C. Iu G.T.Y. Pong Dept. of Industrial and Systems Engineering Hong Kong Polytechnic University Hung Ham Hong Kong School of Electrical Electronic and Computer University of Western Australia Australia School of Electrical Electronic and Computer University of Western Australia WA Australia Dept. of Electrical Engineering Hong Kong Polytechnic University Hung Ham Hong Kong Department of Electrical Engineering Hong Kong Polytechnic University Hung Hom China Dept. of Applied Mathematics Hong Kong Polytechnic University Hung Ham Hong Kong

In this paper, an improved genetic algorithm has been proposed for solving multi-contingency transient stability constrained optimal power flow (MC-TSCOPF) problems. The MC-TSCOPF problem is formulated as an extended optimal power flow (OPF) with additional generator rotor angle constraints and is converted into an unconstrained optimization problem, which is suitable for genetic algorithms to deal with, using a penalty function. The improved genetic algorithm is proposed by incorporating an orthogonal design in exploring solution spaces. A case study indicates that the improved genetic algorithm outperforms the existing genetic algorithm-based method in terms of robustness of solutions and the convergence speed while the solution quality can be kept.

关键词： Load flow Power system transients Genetic algorithms Power system stability Power system modeling Differential algebraic equations Nonlinear equations Power system simulation Constraint optimization Power generation

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Oscillator models and collective motion

IEEE Control Systems Magazine

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IEEE Control Systems Magazine 2007年第4期27卷 89-105页

作者： Paley, Derek A. Leonard, Naomi Ehrich Sepulchre, Rodolphe Grünbaum, Daniel Parrish, Julia K. Princeton University Department of Mechanical and Aerospace Engineering Princeton NJ 08544 United States Department of Mechanical and Aerospace Engineering Program in Applied and Computational Mathematics Princeton University Princeton NJ 08544 United States Department Electrical Engineering and Computer Science University of Liège Liège Belgium School of Oceanography Department of Biology University of Washington Seattle WA United States Biology Department School of Aquatic and Fishery Sciences University of Washington Seattle WA United States

A description of the so called "particles with coupled oscillator dynamics" (PCOD) is presented which is used to model, analyze and synthesize collective motion. An oscillator model with spatial dynamics is presented to help describe how to design steering control laws while it is being used to study biological collectives. Lastly, both engineering and biological analysis were described.

关键词： Oscillators (mechanical)

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