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International Conference on Photonics (ICP)

作者： Yusser Al-Qazwini P. T. Arasu A.S.M. Noor Wireless and Photonics Networks Research Center Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Computer and Communication Systems Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia

We investigate a surface plasmon resonance (SPR)-based optical fiber sensor using 2-D finite-difference time domain (FDTD) simulations. The optical sensor is designed by polishing a single-mode optical fiber by symmetrically removing a portion of its cladding forming two sensing regions. We analyze the effects of two physical parameters of the sensor in an aqueous medium, i.e. the thickness of the metal layer and the amount of residual cladding using numerical simulations. The results show that a good transmission dip can be obtained by optimizing these parameters. Thus, the sensor structure can be deployed as an optical biosensor in aqueous environments.

关键词： Optical fiber sensors Analytical models Optical refraction Biological system modeling Lead Time domain analysis

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An Optimum Free-Table Routing Algorithms of Modified and Traditional Chordal Ring networks of Degree Four

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材料科学与工程（中英文版） 2010年第10期4卷 78-89页

作者： Raja Noor Farah Azura bt Raja Maamor Shah Mohamed Othman Mohd. Hasan Selamat Laboratory of Computational Science and lnformatics lnstitute for Mathematical Research Universiti Putra Malaysia Serdang 43400 Selangor Malaysia Department of Communication Technology and Networks Faculty of Computer Science and Information Technology Universiti Putra Malaysia Serdang 43400 Selangor Malaysia Department of Information Systems Faculty of Computer Science and Information Technology Universiti Putra Malaysia Serdang 43400 Selangor Malaysia

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A novel accelerometer based on microring resonator

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Chinese Optics Letters 2009年第9期7卷 798-801页

作者：莫文琴吴华明郜定山周治平 Wuhan National Laboratory for Optoelectronics College of Optoelectronie Science and Engineering Huazhong University of Science and Technology Faculty of Mechanical and Electronic Information China University of Geosciences Wuhan National Laboratory for Optoelectronics College of Optoelectronic Science and EngineeringHuazhong University of Science and Technology State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University School of Electrical and Computer Engineering Georgia Institute of Technology

A novel microring resonator accelerometer is proposed. It is realized by a suspended straight waveguide coupled with a microring resonator. Under the external acceleration, the coupling coefficient is a function of gap spacing between the two waveguides. The mathematical model of the sensing element is established. Both the finite element method and coupled mode theory are adopted to analyze and optimize the proposed structure. Simulation results show that the mechanical sensitivity is 0.015 μm/g with the working frequency below 500 Hz and cross-axis sensitivity less than 0.001%, which is promising in seismic related applications.

关键词： Accelerometers Mathematical models Waveguides

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Novel Framework of Integrated Security and Safety System Using Hybrid Network Technology

Novel Framework of Integrated Security and Safety System Usi...

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International Conference on computer Modeling and Simulation, UKSIM

作者： Edi Saputra Kamalrulnizam Abu Bakar Herman Herman Suhaidi Hassan Faculty of Computer Science and Information System Universiti Teknologi Malaysia Malaysia Faculty of Computer Science and Information System Universiti Teknologi Malaysia Faculty of Computer Systems and Communication Networks Universiti Utara Malaysia Malaysia

Advancement in micro-electro mechanical system (MEMS) that integrate mechanical system, sensor, actuator, and electronics has contributed to significant improvement of automation system including security and safety system. This paper will propose a framework of integrated security and safety system that combines microembedded system and computer based system. The framework is designed and developed based on conceptual model of security and safety system for enclosed area such as campus, industrial complex, airport, and oil/gas platform. As infrastructure for connecting the security and safety devices, control panels, and network operating center (NOC), the framework will use hybrid networking technology. Such technology interconnects IP-based and non IP network in form of wired and wireless data communication.

关键词： Mechanical systems communication system security Micromechanical devices Mechanical sensors Sensor systems Actuators Automation computer security Air safety Electrical equipment industry

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Audio-Visual Speech Processing Framework for Lip Reading

Audio-Visual Speech Processing Framework for Lip Reading

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International Conference on Information and communication Technologies: From Theory to Applications, ICTTA

作者： Abdulbaset M. Nasr Abd Rahman Ramli Mohammad Hamiruce Shamala K Subramaniam Robotics Lab Institute of advanced technology Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Computer and Communications Systems Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Electrical and Electronics Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Communication Technology & Networks Faculty of Computer Science and Information Technology Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia

It is well known that speech production and perception process is inherently bimodal consisting of audio and visual components. Recently there has been increased interest in using the visual modality in combination with the acoustic modality for improved speech processing. This field of study has gained the title of audio-visual speech processing. Lip movement recognition, also known as lip reading, is a communication skill which involves the interpretation of lip movements in order to estimate some important parameters of the lips that include, but not limited to, size, shape and orientation. In this paper, we represent a hybrid framework for lip reading which is based on both audio and visual speech parameters extracted from a video stream of isolated spoken words. The proposed algorithm is self-tuned in the sense that it starts with an estimations of speech parameters based on visual lip features and then the coefficients of the algorithm are fine-tuned based on the extracted audio parameters. In the audio speech processing part, extracted audio features are used to generate a vector containing information of the speech phonemes. These information are used later to enhance the recognition and matching process. For lip feature extraction, we use a modified version of the method used by F. Huang and T. Chen for tracking of multiple faces. This method is based on statistical color modeling and the deformable template. The experiments based on the proposed framework showed interesting results in recognition of isolated words.

关键词： Speech processing Image processing Parameter estimation Data mining Feature extraction Robots computer networks systems engineering and theory communications technology computer science

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MARKOV DECISION PROCESSES WITH UNCERTAIN TRANSITION RATES: SENSITIVITY AND MAX HYPHEN MIN CONTROL

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Asian Journal of Control 2008年第2期6卷

作者： Suresh Kalyanasundaram Edwin K. P. Chong Ness B. Shroff Motorola India Electronics Limited No. 66/1 Plot 5 Bagmane Techpark C. V. Raman Nagar Post Bangalore 560 093 India. Department of Electrical and Computer Engineering Colorado State University Fort Collins CO 80523-1373 USA. Professor Edwin K. P. Chong received the B.E.(Hons.) degree with First Class Honors from the University of Adelaide South Australia in 1987 graduating top of his class and the M.A. and Ph.D. degrees in 1989 and 1991 respectively both from Princeton University where he held an IBM Fellowship. He joined the School of Electrical and Computer Engineering at Purdue University in 1991 where he was named a University Faculty Scholar in 1999 and promoted to Full Professor in 2001. Since August 2001 he has been a Professor of Electrical and Computer Engineering and Professor of Mathematics at Colorado State University. His current interests are in communication networks and optimization methods. He coauthored the best-selling book An Introduction to Optimization 2nd Edition Wiley-Interscience 2001. He received the NSF CAREER Award in 1995 and the ASEE Frederick Emmons Terman Award in 1998. He coauthored a paper that was awarded Best Paper in the journal Computer Networks 2003. Professor Chong is a Fellow of the IEEE. He was founding chairman of the IEEE Control Systems Society Technical Committee on Discrete Event Systems and until recently served as an IEEE Control Systems Society Distinguished Lecturer. He has been on the editorial board of the IEEE Transactions on Automatic Control. He is currently on the editorial board of the journal Computer Networks. He has also served on the organizing committees of several international conferences. He has been on the program committees for the IEEE Conference on Decision and Control the American Control Conference the IEEE International Symposium on Intelligent Control IEEE Symposium on Computers and Communications and the IEEE Global Telecommunications Conference. He has also served in the executive committees for the IEEE Co

Solution techniques for Markov decision problems rely on exact knowledge of the transition rates, which may be difficult or impossible to obtain. In this paper, we consider Markov decision problems with uncertain transition rates represented as compact sets. We first consider the problem of sensitivity analysis where the aim is to quantify the range of uncertainty of the average per-unit-time reward given the range of uncertainty of the transition rates. We then develop solution techniques for the problem of obtaining the max-min optimal policy, which maximizes the worst-case average per-unit-time reward. In each of these problems, we distinguish between systems that can have their transition rates chosen independently and those where the transition rates depend on each other. Our solution techniques are applicable to Markov decision processes with fixed but unknown transition rates and to those with time-varying transition rates.

关键词： Markov decision processes sensitivity max-min control call admission control policy iteration

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Special issue on the 2nd PGTS 2002

Special issue on the 2nd PGTS 2002

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作者： Kuhn, Paul J. Lehnert, Ralf Pioro, Michal Wozniak, Josef Killat, Ulrich Institute of Communication Networks and Computer Engineering University of Stuttgart Pfaffenwaldring 47 70569 Stuttgart Germany Technische Universitaet Dresden Lehrsthul fuer Telekommunikation Department of Electrical Engineering Telecommunications Mommsenstr. 13 D-01062 Dresden Germany Department of Computer Networks and Switching Institute of Telecommunications Warsaw University of Technology Warsaw Poland Department of Communication Systems Lund University PO Box 118 SE-22100 Lund Sweden Gdansk University of Technology Faculty of Electronics Telecommunications and Informatics 11/12 Narutowicza Str 80-952 Gdansk Poland Kommunikationsnetze AB 4-06 TU Hamburg-Harburg D-21071 Hamburg Germany

No abstract available

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TIME COMPLEXITY OF GATE ASSIGNMENT PROBLEM IN ONE-DIMENSIONAL ARRAY.

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Electronics and communications in Japan, Part I: communications (English translation of Denshi Tsushin Gakkai Ronbunshi) 1987年第9期70卷 59-67页

作者： Fujii, Takashi Kikuno, Tohru Yoshida, Noriyoshi Faculty of Engineering Hiroshima University Higashi-Hiroshima Japan 724 NEC Corporation Kawasaki Japan 211 Noriyoshi Yoshida received degrees of B. Eng. and Dr. Eng. in Electronics from Kyushu University Japan in 1955 and 1968 respectively. He joined Kyushu University from 1956 to 1969 holding positions as Lecturer (1961) and Associate Professor (1968). He has been a Professor of Electronic Circuits and Systems Faculty of Engineering Hiroshima University since 1969. His research interests include logical design of digital systems hardware implementation of algorithmic structures and computer networks. He is currently serving as an Advisory Editor of Journal and Transactions of the Institute of Electronics and Communication Engineers of Japan. Dr. Yoshida is a senior member of the Institute of Electric and Electronic Engineers a member of the Institute of Electronics and Communication Engineers of Japan the Institute of Electrical Engineers of Japan Information Processing Society of Japan and the Institute of Medical Electronics and Biomedical Engineering of Japan.

In the one-dimensional array approach, a logic circuit is realized by arranging NAND (NOR) gates in a one-dimensional array and interconnecting them. To minimize the area required, we must find a one-dimensional assignment of gates so as to minimize the vertical length. This optimization problem (called problem G) has been formulated as a graph problem and has already been proved to be NP-hard. In this paper, a restricted problem (called the problem R) is introduced anew wherein a connection of each net is restricted to be between two gates. The problem R plays an important role in developing a heuristic algorithm for the problem G. As for the time complexity, we show that the problem R is also NP-hard.

关键词： INTEGRATED CIRCUITS, VLSI

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Advances in Signal Processing and Intelligent Recognition systems 1

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丛书名： Advances in Intelligent systems and Computing

1000年

作者： Sabu M. Thampi Sri Krishnan Juan Manuel Corchado Rodriguez Swagatam Das Michal Wozniak Dhiya Al-Jumeily

ISBN: (数字)9783319679341

ISBN: (纸本)9783319679334

This Edited Volume gathers a selection of refereed and revised papers originally presented at the Third International Symposium on Signal Processing and Intelligent Recognition systems (SIRS’17), held on September 13–16, 2017 in Manipal, India. The papers offer stimulating insights into biometrics, digital watermarking, recognition systems, image and video processing, signal and speech processing, pattern recognition, machine learning and knowledge-based systems. Taken together, they offer a valuable resource for all researchers and scientists engaged in the various fields of signal processing and related areas.

关键词： Computational Intelligence Signal, Image and Speech Processing Artificial Intelligence

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