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European Signal Processing Conference (EUSIPCO)

作者： Tuba Sirin Mehmet Izzet Saglam Isin Erer Muhittin Gokmen Okan Ersoy Informatics Institute Computer Science and Engineering Informatics Institute Satellite Communication and Remote Sensing Program Faculty of Electrical and Electronic Engineering Electronics and Communication Department Faculty of Electrical and Electronic Engineering Istanbul Technical University Maslak Istanbul TURKEY Purdue University School of Electrical and Computer Engineering West Lafayette Indiana USA

Most edge detection algorithms include three main stages: smoothing, differentiation, and labeling. In this paper, we evaluate the performance of algorithms in which competitive learning is applied first to enhance edges, followed by an edge detector to locate the edges. In this way, more detailed and relatively more unbroken edges can be found as compared to the results when an edge detector is applied alone. The algorithms compared are K-Means, SOM and SOGR for clustering, and Canny and GED for edge detection. Perceptionally, best results were obtained with the GED-SOGR algorithm. The SOGR is also considerably simpler and faster than the SOM algorithm.

关键词： Image edge detection Image segmentation Vectors Abstracts Filtering algorithms Erbium Training

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Wireless hearing aid system simulations using advanced design system™: A behavioral modeling approach

Wireless hearing aid system simulations using advanced desig...

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2005 27th Annual International Conference of the engineering in Medicine and Biology Society, IEEE-EMBS 2005

作者： Rana, Ram Singh Tang, Bin Zhang, Liang Krishna, Garg Hari Wang, Yun Institute of Microelectronics Singapore Science Park II 11 Science Park Road Singapore 117685 Singapore Graduate Program in Bioengineering National University of Singapore Singapore 117597 Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore 119260 Singapore Department of Otolaryngology Faculty of Medicine National University of Singapore Singapore 119074 Singapore

ISBN: (纸本)0780387406

The stringent requirements on size and power consumption constrain the conventional hearing aid devices from providing the patients an economic and user friendly solution, specifically for better noise cancellation. With the advancements in technologies such as integrated circuits design, wireless communications and digital signal processing techniques, the wireless hearing aids having multi-microphones, analog, digital and mixed signals and radio frequency signals processing circuits, DSP and programmable units seem to be promising to provide enhanced performance. The focus of this paper is about the system simulation of a typical wireless hearing aid using Agilent Advanced Design System™. The behavioral modeling features are exploited to enable the whole system simulations including electro-acoustic transducers. A few system level simulation results are included. © 2005 IEEE.

关键词： Hearing aids

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Telemedicine with digital video transport system in Asia -Pacific area

Telemedicine with digital video transport system in Asia -Pa...

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19th International Conference on Advanced Information Networking and Applications, AINA 2005

作者： Nakashima, Naoki Okamura, Koji Hahm, Joon-Soo Kim, Young-Woo Mizushima, Hiroshi Tatsumi, Haruyuki Moon, Byung-In Han, Ho-Seong Park, Yong-Jin Lee, Jae-Hwa Youm, Sung-Kwan Kang, Chul-Hee Shimizu, Shuji Department of Medical Informatics Kyushu University Faculty of Medicine Fukuoka Japan Computing and Communications Center Kyushu University Fukuoka Japan Department of Medicine Hanyang University Medical College Seoul Korea Republic of Research Institute and Hospital National Cancer Center Goyang Gyeonggi Korea Republic of Research Institute National Cancer Center Tokyo Japan Signal Transduction and Medicine Sapporo Medical University Graduate School of Medicine Sapporo Japan Department of Surgery Breast Center Ewha WomansMokdong Hospital Seoul Korea Republic of Department of Surgery Seoul National University Bundang Hospital Seoul Korea Republic of Division of Electrical and Computer Engineering Hanyang University Seoul Korea Republic of Korea Advanced Research Network Seoul Korea Republic of School of Electrical Engineering Korea University Seoul Korea Republic of Department of Endoscopic Diagnostics and Therapeutics Kyushu University Faculty of Medicine Fukuoku Japan

ISBN: (纸本)0769522491

We have established a medical network in Asia-Pacific area with high-quality moving image on a super broad-banded internet line since February 2003. Broadcasting real-time surgery and teleconference with medical-quality videos with Digital Video Transport System (DVTS) were so useful to learn surgical techniques and other medical procedures beyond borders. We have conducted 20 events in categories of teleconference (8 times), live transmission of medical procedure (6 times), and remote attendance to scientific medical meetings (6 times) until September 2004. We had teleconferences among 3 countries in APAN-Hawaii in January 2004 (Japan, Korea and USA), and in APAN-Cairns in July 2004 (Japan, Korea and Australia). There have been no serious transmission/ ethical problems sofar. With these experiences and current achievements, we hope to extend this advanced network system to whole Asia-Pacific countries to share medical skills and knowledge. © 2005 IEEE.

关键词： Telemedicine

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How to collect balls moving in the euclidean plane

How to collect balls moving in the euclidean plane

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Proceedings of Computing: The Australasian Theory Symposium (CATS)

作者： Asahiro, Yuichi Horiyama, Takashi Makino, Kazuhisa Ono, Hirotaka Sakuma, Toshinori Yamashita, Masafumi Department of Social Information Systems Faculty of Information Science Kyushu Sangyo University Fukuoka 813-8503 Japan Division of Systems Science Graduate School of Engineering Science Osaka University Toyonaka Osaka 560-8531 Japan Depatment of Communications and Computer Engineering Graduate School of Informatics Kyoto University Kyoto 606-8501 Japan Department of Computer Science and Communication Engineering Graduate School of Information Science and Electrical Engineering Kyushu University Fukuoka 812-8581 Japan

In this paper, we study how to collect n balls moving with constant velocities in the Euclidean plane by k robots moving on straight track-lines through the origin. Since all the balls might not be caught by robots, differently from Moving-Target TSP, we consider the following 3 problems in various situations: (i) deciding if k robots can collect all n balls, (ii) maximizing the number of the balls collected by k robots, and (iii) minimizing the number of the robots to collect all n balls. The situations considered here contain the cases in which track-lines are given (or not), and track-lines are identical (or not). For all problems and situations, we provide polynomial time algorithms or proofs of intractability, which clarify the tractability- intractability frontier in the ball collecting problems in the Euclidean plane. © 2004 Elsevier B.V. All rights reserved.

关键词： Problem solving

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How to Collect Balls Moving in the Euclidean Plane

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Electronic Notes in Theoretical computer Science 2004年 91卷 229-245页

作者： Yuichi Asahiro Takashi Horiyama Kazuhisa Makino Hirotaka Ono Toshinori Sakuma Masafumi Yamashita Department of Social Information Systems Faculty of Information Science Kyushu Sangyo University Fukuoka 813-8503 Japan Depatment of Communications and Computer Engineering Graduate School of Informatics Kyoto University Kyoto 606-8501 Japan Division of Systems Science Graduate School of Engineering Science Osaka University Toyonaka Osaka 560-8531 Japan Department of Computer Science and Communication Engineering Graduate School of Information Science and Electrical Engineering Kyushu University Fukuoka 812-8581 Japan

In this paper, we study how to collect n balls moving with constant velocities in the Euclidean plane by k robots moving on straight track-lines through the origin. Since all the balls might not be caught by robots, differently from Moving-Target TSP, we consider the following 3 problems in various situations: (i) deciding if k robots can collect all n balls, (ii) maximizing the number of the balls collected by k robots, and (iii) minimizing the number of the robots to collect all n balls. The situations considered here contain the cases in which track-lines are given (or not), and track-lines are identical (or not). For all problems and situations, we provide polynomial time algorithms or proofs of intractability, which clarify the tractability-intractability frontier in the ball collecting problems in the Euclidean plane.

关键词： Moving-Target TSP Vehicle routing problem Partially ordered set Combinatorial optimization

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DCT and wavelet based image compression in satellite images

DCT and wavelet based image compression in satellite images

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International Conference on Recent Advances in Space Technologies, RAST 2003

作者： Hacihaliloglul, Llker Karta, Mesut Satellite Communication and Remote Sensing Graduate Program Advanced Technologies in Engineering Informatics Institute Istanbul Technical University Maslak Istanbul34469 Turkey Electronic and Communication Department Faculty of Electrical and Electronic Engineering Istanbul Technical University Maslak Istanbul34469 Turkey

ISBN: (纸本)0780381424

Synthetic aperture radar (SAR) and SPOT images are becoming increasingly important and abundant in a variety of remote sensing and tactical applications. Thus, there is a strong interest in developing data encoding and decoding algorithms that can obtain higher compression ratios while keeping image quality to an acceptable level. This study aims to compare most of the well-known compression techniques namely discrete cosine transform and discrete wavelet transform. It investigates RADARSAT and SPOT images of different regions of different characteristics. RADARSAT-I fine and standard beam mode images of the different regions in Istanbul are used to test the performance of the compression algorithms. The regions, which have been investigated, were sea areas, forest areas, built environment - residential and industrial areas which define different patterns of urban land use. The studies showed that homogeneous areas like forest and sea gave better compression results compared to heterogeneous areas like industrial and environmental. The second purpose of this study is to compare the two compression algorithms. The discrete wavelet based algorithm gave much better results compared to the discrete cosine transform based algorithm. The results changed according to the quantization process and the transform coding algorithm. © 2003 IEEE.

关键词： Discrete wavelet transforms

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Radial basis function neural networks in variable structure control of a class of biochemical processes

Radial basis function neural networks in variable structure ...

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Annual Conference of Industrial Electronics Society

作者： M.O. Efe O. Kaynak B.M. Wilamowski Xinghuo Yu Electrical and Computer Engineering Department Carnegie Mellon University Pittsburgh PA USA Electrical and Electronic Engineering Department Bogazici University Bebek Istanbul Turkey Graduate Center at Boise University of Idaho Boise ID USA Faculty of Informatics and Communication Central Queensland University Rockhampton QLD Australia

Biochemical processes often display a complicated dynamic behavior, the detailed understanding of which frequently constitutes a barrier between the theoretical foundations and practical implementations. One way of handling the complexity is to use intelligent approaches in the design of controllers. The paper presents an analytic approach to design controllers based on radial basis function neural networks (RBFNN) with particular emphasis on the extraction of the error measure to be used in parameter tuning. The simulation studies stipulate that the control system exhibits a highly robust behavior against disturbances and sharp changes in the command signal. The most important contribution of the paper is that the method presented does not require the analytical details describing the plant dynamics available.

关键词： Radial basis function networks Intelligent networks Neurons Neural networks Error correction Communication system control Electric variables control computer displays Variable structure systems Centralized control

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Hamiltonian Realizations of Nonlinear Adjoint Operators

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IFAC Proceedings Volumes 2000年第2期33卷 39-44页

作者： Kenji Fujimoto Jacquelien M.A. Scherpen W. Steven Gray Faculty of Information Technology and Systems Department of Electrical Engineering Delft University of Technology P. O. Box 5031 2600 GA Delft The Netherlands Department of Systems Science Graduate School of Informatics Kyoto University Uji Kyoto 611-0011 Japan Department of Electrical and Computer Engineering Old Dominion University Norfolk Virginia 23529-0246 U.S.A.

This paper addresses state-space realizations for nonlinear adjoint operators. In particular the relationship among nonlinear Hilbert adjoint operators, Hamiltonian extensions and port-controlled Hamiltonian systems are clarified. The characterization of controllability, observability and Hankel operators, and controllability and observability functions will be derived based on it. Furthermore a duality between the controllability and observability functions will be proven. The statespace realizations ofsuch operators provide new insights to nonlinear control systems theory.

关键词： Nonlinear control systems adjoint operators Hamiltonian control systems Hamiltonian extensions Legendre transformations

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Rough Sets and Current Trends in Computing 1

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丛书名： Lecture Notes in computer Science

1000年

作者： Salvatore Greco Yutaka Hata Shoji Hirano Masahiro Inuiguchi Sadaaki Miyamoto Hung Son Nguyen Roman Słowiński

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