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作者： Takiguchi, Tetsuya Nishimura, Masafumi Ariki, Yasuo IBM Tokyo Research Laboratory Yamato-shi 242-8502 Japan Department of Computer and System Engineering Kobe University Kobe-shi 657-8501 Japan Kobe University Japan IEEE Information Processing Society of Japan Japan Acoustical Society of Japan Japan Speech Technology Group TRL IPSJ Japan ASJ IEEE JSAI ITE IIEEJ

This paper describes a hands-free speech recognition technique based on acoustic model adaptation to reverberant speech. In hands-free speech recognition, the recognition accuracy is degraded by reverberation, since each segment of speech is affected by the reflection energy of the preceding segment. To compensate for the reflection signal we introduce a frame-by-frame adaptation method adding the reflection signal to the means of the acoustic model. The reflection signal is approximated by a first-order linear prediction from the observation signal at the preceding frame, and the linear prediction coefficient is estimated with a maximum likelihood method by using the EM algorithm, which maximizes the likelihood of the adaptation data. Its effectiveness is confirmed by word recognition experiments on reverberant speech. Copyright © 2006 The Institute of Electronics, Information and Communication Engineers.

关键词： Speech recognition

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A profile-based protein sequence alignment algorithm for a domain clustering database

A profile-based protein sequence alignment algorithm for a d...

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IEEE Symposium on Computational Intelligence and Bioinformatics and Computational Biology (CIBCB)

作者： Lin Xu Fa Zhang Zhiyong Liu Graduate School of Chinese Academy of Sciences China Key Laboratory of Computer System and architecture Institute of Computing Technology Chinese Academy and Sciences China National Natural Science Foundation China

Aiming at the two main shortcomings in Homology Modeling, we have designed and established a domain clustering database. Searching the database is a fundamental work for it. However, current alignment algorithms are mainly based on the sequences, ignoring the structure conservation in domain. This paper proposed a profile-based alignment which considers the structure information into the profile, based on the character of our domain database. We designed an experiment within the database. The results show that both the quality and sensitivity of our scheme are better than pure Smith-Waterman and sequence-based profile algorithms. We strongly believe that this work can help to improve the protein structure prediction

关键词： Protein sequence Clustering algorithms Databases Sequences Heuristic algorithms Laboratories computer architecture Algorithm design and analysis Computational efficiency Acceleration

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Access Control Policy Management Framework based on RBAC in OSGi Service Platform

Access Control Policy Management Framework based on RBAC in ...

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International Conference on computer and Information technology (CIT)

作者： Eun-ae Cho Chang-joo Moon Dae-ha Park Doo-kwon Baik Software System Laboratory Department of Computer Science & Engineering Korea University of Technology and Education Seoul South Korea Department of Computer Science Konkuk University Chungju Chungcheongbuk South Korea Department of Computer and Information Science Korea Digital University Seoul South Korea

The OSGi provides a service platform which ensures the interoperability between heterogeneous technologies and various devices in home network environment. Nowadays, user access control is one of the core parts which should be cleared, but there are no concrete researches yet. So in this paper, we propose a supplemented authorization policy management framework based on RBAC (Role-Based Access Control) for user access control at home network environment in which the OSGi service platform is operated. The proposed access control framework improves effectiveness, assures privacy and provides convenience at the same time. In conclusion, we provide the base to implement the effective, safe, and convenient the OSGi service platform by proposing the new framework in authorization and user administration part.

关键词： Access control Home automation Authorization Privacy Consumer electronics Authentication computer science Concrete Environmental management Information technology

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New optimization algorithm based on chaos

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Journal of Zhejiang University: Science 2006年第4期7卷 539-542页

作者： Lu, Hui-Juan Zhang, Huo-Ming Ma, Long-Hua Institute of Computer Applications China Jiliang University Hangzhou 310018 China National Laboratory of Ocean and Civil Engineering Shanghai Jiaotong University Shanghai 200030 China National Laboratory of Industrial Control Technology Institute of System Engineering Institute Zhejiang University Hangzhou 310027 China

In this article, some methods are proposed for enhancing the converging velocity of the COA (chaos optimization algorithm) based on using carrier wave two times, which can greatly increase the speed and efficiency of the first carrier wave's search for the optimal point in implementing the sophisticated searching during the second carrier wave is faster and more accurate. In addition, the concept of using the carrier wave three times is proposed and put into practice to tackle the multi-variables optimization problems, where the searching for the optimal point of the last several variables is frequently worse than the first several ones.

关键词： Optimization

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Polar LEO satellite constellation measurement by delay probing

Polar LEO satellite constellation measurement by delay probi...

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IEEE International Conference on Performance, Computing and Communications (IPCCC)

作者： Junfeng Wang Hongxia Zhou Fanjiang Xu Mingtian Zhou College of Computer Science and Engineering University of Electronic Science and Technology ChengDu China National Key Laboratory of Integrated Information System Technology Institute of Software Chinese Academy and Sciences Beijing China Chongqing Communication College Chongqing China

Low Earth orbit (LEO) satellite networks are capable of providing wireless connectivity seamlessly and continuously to any part of the world with guaranteed short round-trip propagation delay. As a key part of next generation network (NGN) infrastructure, next generation satellite networks are expected to support a variety of applications with diverse performance requirements. This paper argues that the constellation tomography for the LEO satellite network is a preliminary step for efficient satellite network monitoring and performance promotion. To measure the constellation, a divide-and-conquer mechanism is developed for each parameter estimation by delay probing. The delay measurement is only carried out between two terminals located at the same geographic positions. Performance evaluation on several popular polar LEO constellations proves the accuracy and efficiency of the developed constellation tomography algorithms in divide-and-conquer manner. The geographic position limitation of the delay probing terminals for valid constellation inference is also analyzed in the paper

关键词： Low earth orbit satellites Satellite constellations Extraterrestrial measurements Next generation networking Tomography Propagation delay Monitoring Parameter estimation Delay estimation Position measurement

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Topological dynamics characterization for layered satellite networks

Topological dynamics characterization for layered satellite ...

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IEEE International Conference on Performance, Computing and Communications (IPCCC)

作者： Junfeng Wang Yuemei Hu Hongxia Zhou Mingtian Zhou College of Computer Science and Engineering University of Electronic Science and Technology ChengDu China National Key Laboratory of Integrated Information System Technology Institute of Software Chinese Academy and Sciences Beijing China Chongqing Communication College Chongqing China

The highly topological dynamics characterize the most fundamental property of satellite networks contrary to the terrestrial networks. This manifest feature directs the researches on various aspects of satellite networks, including routing and switching architecture selection, routing protocol and reliable transmission control protocol design and enhancement, etc,. The paper quantifies the dynamical activates of layered satellite network topologies. The number and length of network snapshots of one-layered satellite constellations are formulated concisely. The snapshot distributions of typical multi-layered constellations are also evaluated. With this work, it compensates for the simplified topological assumptions in many satellite network related investigations. The thorough understanding of this basic feature not only provides for an accurate quantification of network behavior, but also guides constellation design for future satellite networks

关键词： Low earth orbit satellites Satellite broadcasting Satellite constellations Routing protocols Network topology Next generation networking Quality of service Laboratories Information systems Communication system software

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Theory and Network Applications of Dynamic Bloom Filters

Theory and Network Applications of Dynamic Bloom Filters

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IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： D. Guo J. Wu H. Chen X. Luo Key laboratory of C4ISR Technology School of Information System and Management National University of Defense Technology Changsha Hunan China Department of Computer Science and Engineering Florida Atlantic University Boca Raton FL USA

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Broad and Positive Conversion Efficiency in Raman-Assisted Fiber Ring Laser

Broad and Positive Conversion Efficiency in Raman-Assisted F...

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International RF and Microwave Conference, RFM

作者： Ummi Supya Ismail Muhammad Zamzuri Abdul Kadir Zainuddin Rahman Mohd. Adzir Mahdi Sahbudin Shaari TMR&D SDN. BHD UPM-MTDC Tech Serdang Malaysia TMR&D SDN. BHD Idea Tower Incubation Center One Serdang Department of Computer and System Engineering Faculty of Engineering UPM Serdang Malaysia Dept. of Computer and System Eng. UPM Serdang Department of Electrical Electronics & System Engineering UKM Malaysia Photonic Technology Laboratory Electronics & System Eng.

One of many fiber non-linear effects is a four-wave mixing (FWM) phenomenon that is resonant when phase matching condition is satisfied. It only occurs for particular combinations of fiber dispersion and signal frequencies. In particular, phase matching is achieved for signals with very similar frequencies propagating near the zero dispersion wavelength of the fiber. This paper proposes optical wavelength conversion based on FWM assisted by Raman amplification. The conversion bandwidth extends to 125nm, the widest yet reported for wavelength conversion using highly non-linear fiber (HNLF) irrespective to the conversion efficiency value. The 1R property defined when conversion efficiency (CE) is positive was found to cover an area of 19.5nm

关键词： Fiber lasers Ring lasers Optical frequency conversion Optical wavelength conversion Wavelength conversion Four-wave mixing Resonance Optical propagation Stimulated emission Bandwidth

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A Digital Right Management Model for Distribution of Digital Audiovisual Content

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Wuhan University Journal of Natural Sciences 2006年第6期11卷 1877-1881页

作者： FAN Kefeng PEI Qingqi WANG Meihua MO Wei CAO Ling Key Laboratory of Computer Networks and Information Security Ministry of Education Xidian University Xi＇an 710071 Shaanxi China Electronic Equipment and System Research Center China Electronics Standardization Institute Beijing 100007 China TRS Open Laboratory Beijing Information Technology Institute Beijing 100101 China

This paper presents a digital rights management model, which considers the integrated factors including legality, communication security, integrity of the content, and trading fairness. The architecture of the model, the necessary protocol for the copyright control and content distribution, the authentication mechanism which offer consumption registration for content fair distribution, of the model are all provided. The scheme also provides distribution and evidence for using the copyright of digital content fairly and effectively. Finally, analysis shows the proposed model has both high security and good performance.

关键词： digital rights management content distribution authentication mechanism model

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Using Accelerator Feedback to Improve Performance of Integral-Controller Particle Swarm Optimization

Using Accelerator Feedback to Improve Performance of Integra...

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Firth IEEE International Conference on Cognitive Informatics(第五届认知信息国际会议)

作者： Zhihua Cui Jianchao Zeng Guoji Sun State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an 710049 Division of System Simulation and Computer Application Taiyuan University of Science and Technology State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an 710049

ISBN: (纸本)9781424404759

Integral-controller particle swarm optimization (ICPSO), influenced by inertia weight w and coefficient ψ is a new swarm technology by adding accelerator information. Based on stability analysis, the convergence conditions imply the negative selection principles of inertia weight w, and the relationship between w and ψ. To improve the computational efficiency, an adaptive strategy for tuning the parameters of ICPSO is described using a new statistical variable reflecting computational efficiency index-average accelerator information. The optimization computing of some examples is made to show that the ICPSO has better global search capacity and rapid convergence speed.

关键词： Particle swarm optimization Average Accelerator Information Integral-controller

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