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Joint 48th IEEE Conference on Decision and Control and 28th Chinese Control Conference

作者： Zhichun Yang Yiguang Hong Zhong-Ping Jiang Xiaoli Wang Chongqing Key Lab of Operations Research and System Engineering Department of Mathematics and Computer ScienceChongqing Normal University Institute of Systems Science Chinese Academy of Sciences Key Laboratory of Systems and Control Institute of Systems ScienceChinese Academy of Sciences Dept.of Electrical & Computer Engineering Polytechnic Institute of New York University

In this paper,we consider the feedback stabilization problem of impulsive linear control systems with quantized input signals and quantized output *** concepts including quasi-invariant sets and attracting sets for hybrid impulsive quantized systems are *** on these concepts and the analysis of related dynamic properties,we propose hybrid quantized control schemes to stabilize the considered impulsive systems via state and output feedback.

关键词： quantization impulsive systems hybrid control stabilization

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An active defense model and framework of insider threats detection and sense

An active defense model and framework of insider threats det...

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5th International Conference on Information Assurance and Security, IAS 2009

作者： Zhang, Hongbin Ma, Jianfeng Wang, Yinchuan Pei, Qingqi Ministry of Education Key Lab. of Computer Network and Information Security Xidian Univ. Xi'an 710071 China Inst. of Information Sci. and Eng. Hebei Univ. of Sci. and Tech. Shijiazhuang 050018 China Research Institute China Electronic Equipment and Systems Engineering Corporation Beijing 100141 China

ISBN: (纸本)9780769537443

Insider attacks is a well-known problem acknowledged as a threat as early as 1980s. The threat is attributed to legitimate users who take advantage of familiarity with the computational environment and abuse their privileges, can easily cause significant damage or losses. In this paper, we present an active defense model and framework of insider threat detection and sense. Firstly, we describe the hierarchical framework which deal with insider threat from several aspects, and subsequently, show a hierarchy-mapping based insider threats model, the kernel of the threats detection, sense and prediction. The experiments show that the model and framework could sense the insider threat in real-time effectively. © 2009 IEEE.

关键词： Network security

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is-rSNP: a novel technique for in silico regulatory SNP detection

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BMC Bioinformatics 2010年第10期11卷 1-1页

作者： Geoff Macintyre James Bailey Adam Kowalczyk Izhak Haviv Department of Computer Science and Software Engineering The University of Melbourne Victoria 3010 Australia NICTA Victoria Research Lab The University of Melbourne Victoria 3010 Australia Department of Biochemistry and Molecular Biology The University of Melbourne Victoria 3010 Australia Ian Potter Centre for Cancer Genomics and Predictive Medicine Peter MacCallum Cancer Centre East Melbourne Victoria Australia Bioinformatics and Systems Integration The Blood and DNA Profiling Facility Baker IDI heart and diabetes Institute 75 Commercial Rd Prahran 3004 Victoria Australia

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Wireless ventilation control for large-scale systems: The mining industrial case

Wireless ventilation control for large-scale systems: The mi...

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2009 6th IEEE Annual Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks Workshops, SECON Workshops 2009

作者： Di Benedetto, M.D. Innocenzo, A.D. Fischione, C. Isaksson, A.J. Johansson, K.H. Niculescu, S.-I. Olaru, S. Sandou, G. Santucci, F. Serra, E. Tennina, S. Tiberi, U. Witrant, E. Control Systems Department Universit'e Joseph Fourier / GIPSA-lab Grenoble France Department of Electrical and Computer Engineering DEWS - University of L'Aquila L'Aquila Italy Automatic Control Department SUPELEC Gif sur Yvette France ABB Corporate Research Vasterås Sweden Automatic Control Department KTH Stockholm Sweden LSS-SUPELEC Gif-sur-Yvette France

ISBN: (纸本)9781424439386

Mining ventilation is an interesting example of a large scale system with high environmental impact where advanced control strategies can bring major improvements. Indeed, one of the first objectives of modern mining industry is to fulfill environmental specifications [1] during the ore extraction and crushing, by optimizing the energy consumption or the production of polluting agents. The mine electric consumption was 4 % of total industrial electric demand in the US in 1994 (6 % in 2007 in South Africa) and 90 % of it was related to motor system energy [2]. Another interesting figure is given in [3] where it is estimated that the savings associated with global control strategies for fluid systems (pumps, fans and compressors) represent approximately 20 % of the total manufacturing motor system energy savings. This motivates the development of new control strategies for large scale aerodynamic processes based on appropriate automation and a global consideration of the system. More specifically, the challenge in this work is focused on the mining ventilation since as much as 50 % or more of the energy consumed by the mining process may go into the ventilation (including heating the air). It is clear that investigating automatic control solutions and minimizing the amount of pumped air to save energy consumption (proportional to the cube of airflow quantity [4]) is of great environmental and industrial interest. © 2009 IEEE.

关键词： Energy utilization

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Fabrication and characterization of optical 1x12 fused-taper-twisted polymer optical fiber splitters

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Journal of Optical Communications 2009年第1期30卷 16-19页

作者： Safnal, Mohd Hadi Guna Ab-Rahman, Mohammad Syuhaimi Harun, Mohd Hazwan Universiti Kebangsaan Malaysia 8-402 Kolej Keris mas 43600 Bangi Selangor Malaysia Universiti Kebangsaan Malaysia Department of Electrical Electronic and Systems Engineering Computer and Network Security Research Croup Lab. 43600 Bangi Selangor Malaysia

Optical 1x12 fused-taper-twisted polymer optical fiber (POF) splitters has been fabricated by a perform techni-que. Characterization of the splitter which proposed to be used in short haul communication application was reported. Characterization test on the network were observed. The maximum output power efficiency of the splitter is about 40%.

关键词： Plastic optical fibers

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VALIDATION OF MINIMUM-ENERGY BAND-LIMITED PREDICTION USING VEHICULAR CHANNEL MEASUREMENTS

VALIDATION OF MINIMUM-ENERGY BAND-LIMITED PREDICTION USING V...

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European signal processing conference

作者： Thomas Zemen Sebastian Caban Nicolai Czink Markus Rupp ftw. Forschungszentrum Telekom- munikation Wien Donau-City-StraBe 1 1220 ViennaAustria Institute of Communications and Radio-Frequency Engineering Vienna University of Technology Gusshausstr. 25/389 1010 ViennaAustria ftw. Forschungszentrum Telekom- munikation Wien Donau-City-StraBe 1 1220 ViennaAustriaSmart Antennas Research Group Information Systems Lab Stanford University Packard 215 Stanford CA 94305USA

ISBN: (纸本)9781617388767

We demonstrate that minimum-energy (ME) band-limited prediction shows the same robust performance for vehicular channel measurements as well as for the numeric Clarke channel model. By contrast, channel prediction based on sinusoidal modelling presented by Chen et al., 2007, shows poor performance for a small percentage of measured channel realizations. This increases the mean square error dramatically, hence outlier removal is required. The ME band-limited predictor introduced by Zemen et al., 2007, is based on a subspace spanned by time-concentrated and band-limited sequences. The time-concentration of these sequences is matched to the length of the observation interval and the band-limitation is determined by the support of the Doppler power spectral density of the fading process. The low-complexity time-variant fiat-fading channel predictor dynamically selects a predefined subspace from a small set such that die prediction error is minimized. We validate the ME band-limited predictor using channel measurements from an alpine region. The predictor performance with measured channels is comparable to the one obtained with Clarke's channel model for non line-of-sight situations. For line-of-sight situations the performance is better than for Clarke's model. We present results in terms of mean square error averaged over all measured snapshots.

关键词： Antennas Abstracts Prediction algorithms Fading Vehicle dynamics Antenna measurements Q measurement

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Evaluation of internal validity measures in short-text corpora

Evaluation of internal validity measures in short-text corpo...

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9th International Conference on Intelligent Text Processing and Computational Linguistics

作者： Ingaramo, Diego Pinto, David Rosso, Paolo Errecalde, Marcelo Development and Research Laboratory in Computacional Intelligence (LIDIC) UNSL Argentina Natural Language Engineering Lab. Department of Information Systems and Computation Polytechnic University of Valencia Spain Faculty of Computer Science (FCC) BUAP Mexico

ISBN: (纸本)9783540781349

Short texts clustering is one of the most difficult tasks in natural language processing due to the low frequencies of the document terms. We are interested in analysing these kind of corpora in order to develop novel techniques that may be used to improve results obtained by classical clustering algorithms. In this paper we are presenting an evaluation of different internal clustering validity measures in order to determine the possible correlation between these measures and that of the F-Measure, a well-known external clustering measure used to calculate the performance of clustering algorithms. We have used several short-text corpora, in the experiments carried out. The obtained correlation with a particular set of internal validity measures let us to conclude that some of them may be used to improve the performance of text clustering algorithms.

关键词： Clustering algorithms

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Robotics as a tool for immersive, hands-on freshmen engineering instruction

Robotics as a tool for immersive, hands-on freshmen engineer...

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2008 ASEE Annual Conference and Exposition

作者： Mataric, Maja Fasola, Juan Feil-Seifer, David University of Southern California Department of Computer Science and Neuroscience University of Southern California USC Center for Robotics and Embedded Systems USC Robotics Research Lab. USC Viterbi School of Engineering Computer Science Department University of Southern California Computer Science Department University of Southern California Interaction Lab.

Hands-on experience plays a key role in undergraduate engineering education. It is a recognized tool for recruitment and retention, as well as for encouraging participation in class and in research outside of the classroom. However, early undergraduate engineering education, especially during the freshman year, is often focused on foundational theory, and delivered through lecture format, rather than hands-on projects. We have developed and taught a semesterlong class at the University of Southern California Viterbi School of engineering (VSoE) that uses robotics as a pedagogical tool for engaging students in engineering, and illustrating general engineering principles and techniques in a hands-on manner. The model for the new course is to combine lectures on principles and applications of engineering from professors from a variety of VSoE departments with lab experience, wherein students work with robots in order to directly apply those principles and scratch the surface of some applications. Our goal is to create a curriculum where, with little to no prior experience with either programming or robotics, freshmen interested in engineering can explore both the breadth of engineering, and glimpse the depth of a single domain through engaging hands-on projects. Unlike most other robotics courses, especially introductory ones that use simple robot platforms such as LEGO robots, ours features highly sophisticated mobile and humanoid robots, allowing the students to develop engaging and sophisticated-appearing behavior. The semester culminated in a public exhibition of team projects at a local science museum. We will use the experiences of the students and instructors of this new course to study the impact of hands-on engineering, team-work, and open challenges on encouraging retention in engineering beyond the first year, for recruitment and retention of traditionally under-represented student groups. © American Society for engineering Education, 2008.

关键词： Teaching

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On the use of mutual information to compare the performance of wireless sensor networks in detection applications

On the use of mutual information to compare the performance ...

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2008 International Conference on Information Processing in Sensor Networks, IPSN 2008

作者： Fonseca Jr., Benedito J.B. Gubner, John A. Wireless Systems Research Lab. Motorola Labs. Schaumburg IL 60196-1078 United States Department of Electrical and Computer Engineering University of Wisconsin Madison WI 53706-1691 United States

ISBN: (纸本)9780769531571

The problem of choosing among candidate wireless sensor networks (WSNs) that send data to a fusion center to detect a binary phenomenon in nature is considered. Viewing the system as a communication channel in which nature is the transmitter and the fusion center is the receiver, it is intuitive to prefer the system that provides the highest mutual information between the phenomenon and the received signal at the fusion center. This paper reviews existing literature on this criterion and provides complementary results showing that, under a Bayesian framework, a WSN that provides equal or higher mutual information than other WSNs results in equal or better detection performance only in very restrictive settings. This paper also presents a bound on the detection performance of a WSN having the highest mutual information, and it is shown that the bound becomes tight as the mutual information approaches its maximum. Similar conclusions are obtained in the Neyman-Pearson framework. © 2008 IEEE.

关键词： Wireless sensor networks

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Novel VLSI implementation of Peano-Hilbert curve address generator

Novel VLSI implementation of Peano-Hilbert curve address gen...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： Yan Wang Shoushun Chen Amine Bermak Smart Sensory Integrated Systems Lab Electronic and Computer Engineering Department Hong Kong University of Science and Technology Kowloon Hong Kong China

This paper presents a fast algorithm for generating Hilbert address for hardware implementation with low storage requirement. This work avoids the use of recursive functions as compared with Quinqueton's work, and eliminates complicated bit manipulations as proposed by Butz, and does not use any look-up-tables as implemented by Kamata. Each address can be obtained in one clock cycle by one-to-one mapping using a simple incremental counter and cascading of multiplexers. The merit of our method is that it achieves very high speed when computing the Hilbert address which requires little memory storage.

关键词： Very large scale integration Hardware Clocks Image resolution Counting circuits Hilbert space Multiplexing Prototypes Canning Image analysis

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