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IMTC'05 - Proceedings of the IEEE Instrumentation and Measurement Technology Conference

作者： Grimaldi, Domenico Rapuano, Sergio Laopoulos, Theodore Department of Electronics Computer and System Science University of Calabria Rende-CS Italy Engineering Faculty University of Sannio Piazza Roma Benevento Italy Electronics Lab. Physics Department Aristotle University of Thessaloniki Thessaloniki Greece

ISBN: (纸本)0780388798

Nowadays the multimedia tools have an important role in both the management of the lectures and the organization of the course program on instrumentation and measurement. In this new scenario the Virtual Laboratory (VL) represents the environment in which the learning activities are performed. Starting from this observation, in the paper an overview of the state of the an of the VL-based education on instrumentation and measurement is given. The fundamental aspects concerning both the software and the hardware to design the VL are examined. Attention it is also devoted to innovative requirements and interesting open questions arising from the large diffusion of the VLs. © 2005 IEEE.

关键词： Distance education

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Analysis of unsaturation performance of IEEE 802.11 DCF with and without slow contention window decrease

Analysis of unsaturation performance of IEEE 802.11 DCF with...

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作者： Sakakibara, Katsumi Chikada, Shogo Yamakita, Jiro Faculty of Computer Science and System Engineering Okayama Prefectoral University Soja-shi 719-1197 Japan Okayama Prefectoral University Soja Japan Department of Communication Engineering Japan IEEE Japan of Japan Japan Department of Communication Engineering Okayama Prefectural University Soja Japan of Japan Japan United States

Most of analytical models proposed so far for the IEEE 802.11 distributed coordination function (DCF) focus on saturation performance. In this paper, we develop an analytic model for unsaturation performance evaluation of the IEEE 802.11 DCF with and without slow contention window decrease (SCWD). The model explicitly takes into account the carrier sensing mechanism and an additional backoff interval after successful frame transmission, both of which can be ignored under saturation conditions. Expressions are derived for throughput and delay characteristics by means of the equilibrium point analysis. The accuracy of our model is validated through computer simulation. Numerical results based on the IEEE 802.11b with CCK show that the SCWD can stably achieve approximately 20% performance gain over the normal 802.11 DCF under unsaturation conditions as well as saturation ones. Copyright © 2005 The Institute of Electronics, Information and Communication Engineers.

关键词： Electric power distribution

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Multicast based and fast handover scheme in mobile IPv6 wireless network

Multicast based and fast handover scheme in mobile IPv6 wire...

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International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, iWAT

作者： Yong Chu Eu S. Khatun B.M. Ali M. Othman Department of Computer and Communication System Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Computer and Communication System Engineering Faculty of Engineering University of Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Communication Technology and Network Faculty of Science Computer Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia

The main goal of mobile IPv6 is that a mobile node is always addressable by its home address, whether it is currently attached to its home link or is away from home. Mobile IPv6 enables applications running on an Internet node to survive physical reconnection by inserting a few additional features at the network layer. In this paper, focus is given to a micro-mobility based test-bed development with improved algorithm. The test-bed consists of both hardware and software, including four PCs and one laptop. The laptop is used as mobile host (MH), two PCs act as access points, one PC becomes the home agent (HA) and one PC is used as a multicast router (ML). This test-bed is used to verify the theoretical enhancement of the micro-mobility handover algorithm via the results (packet loss, handover delay and quality of service). There is no signaling traffic overload between the MH, HA and correspondent host (CH), the handover delay is low, approximately below 10 ms, and the video stream has good reception.

关键词： Wireless networks Multicast algorithms Personal communication networks Portable computers Delay Application software IP networks Software testing Hardware Quality of service

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Modulus maximum image energy using maximum entropy

Modulus maximum image energy using maximum entropy

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International Symposium on Electronics in Marine (ELMAR)

作者： D. Heric D. Zazula Univerza v Mariboru Maribor SI Faculty of Electrical Engineering and Computer Science Laboratory of System Software Laboratory Maribor Slovenia

A negative gradient of the image energy is a driving force, which controls the movement of an active contour. We might say that the final shape depends most on how well the image energy is defined. Traditional image energy models produce a limited range of the force and a poor vector filed definition for concave regions. These limitations have been resolved by a gradient vector flow whose major disadvantage is computational time. However, we have proposed a novel modulus maximums image energy that is based on the wavelet transform. It is defined as a cubic spatial interpolation between adjacent modulus maxima. Its negative gradient has a large capture range and forces active contours also into a concave shape. At the end an example of active contour driven by the negative gradient of modulus maximum image energy is presented

关键词： Entropy Active contours Shape Deformable models Laboratories Force control Energy resolution computer science system software Control systems

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Application of string kernels in protein sequence classification

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Applied Bioinformatics 2005年第1期4卷 45-52页

作者： Zaki, Nazar M. Deris, Safaai Illias, Rosli College of Information Technology United Arab Emirates University Al Ain United Arab Emirates Artificial Intelligence and Bioinformatics Laboratory Faculty of Computer Science and Information System Universiti Teknologi Skudai Johor Malaysia Department of Bioprocess Engineering Faculty of Chemical and Natural Resource Engineering Universiti Teknologi Skudai Johor Malaysia College of Information Technology United Arab Emirate University Al Ain PO Box 17555 United Arab Emirates

Introduction: The production of biological information has become much greater than its consumption. The key issue now is how to organise and manage the huge amount of novel information to facilitate access to this useful and important biological information. One core problem in classifying biological information is the annotation of new protein sequences with structural and functional features. Method: This article introduces the application of string kernels in classifying protein sequences into homogeneous families. A string kernel approach used in conjunction with support vector machines has been shown to achieve good performance in text categorisation tasks. We evaluated and analysed the performance of this approach, and we present experimental results on three selected families from the SCOP (Structural Classification of Proteins) database. We then compared the overall performance of this method with the existing protein classification methods on benchmark SCOP datasets. Results: According to the F1 performance measure and the rate of false positive (RFP) measure, the string kernel method performs well in classifying protein sequences. The method outperformed all the generative-based methods and is comparable with the SVM-Fisher method. Discussion: Although the string kernel approach makes no use of prior biological knowledge, it still captures sufficient biological information to enable it to outperform some of the state-of-the-art methods. © 2005 Adis Data Information BV. All rights reserved.

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Real-time simulation to study the impact of renewable energy in power systems

Real-time simulation to study the impact of renewable energy...

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International Conference on Future Power systems

作者： I.J. van Vliet A.M. van Voorden P.H. Schavemaker G.C. Paap L. van der Sluis Faculty of Electrical Engineering Mathematics & Computer ScienceElectrical Power System Laboratory (EPS) Delft University슠of슠Technology Delft Netherlands

A real-time simulation tool, in our case a real-time digital simulator (RTDS), gives the opportunity to study the impact of renewable energy in power systems on a real-time base, driven by actual solar and wind data. In the first part of this paper, the real-time digital simulator (RTDS) is briefly introduced. The application of this analyzing tool is first demonstrated on a detailed model of a wind energy conversion system (WECS) whereas secondly the application on an autonomous power system is shown. Both applications demonstrate the capabilities of this simulator and the added value for power system analysis

关键词： Power system simulation Real time systems Renewable energy resources Power system modeling Power system analysis computing Induction generators Computational modeling Wind energy Distributed power generation Power generation

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Ship hull fitting using NURBS

Ship hull fitting using NURBS

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International Conference on computer Graphics, Imaging and Visualization, CGIV

作者： A.S. Wen S.M.H. Shamsuddin Y. Samian Department of Graphics and Multimedia Faculty of Computer Science and Information System Universiti Teknologi Malaysia Malaysia Department Of Marine Technology Faculty of Mechanical Engineering Universiti Teknologi Malaysia Malaysia

Ship hull form module is the main module in ship design. The problem of creating fair ship hull surface is of major importance in computer aided ship design environment. The fairness of these surfaces is generally considered a subjective notion depending on the judgment of the designers (e.g. visually pleasing, devoid of unnecessary bumps or wiggles, satisfying certain continuity requirements). One of the restriction in ship hull design is that the existing details of a ship design on paper or a ship that already been constructed physically couldn't be reconstructed accurately and concisely in a ship hull design software. This problem can take on many different characteristics, depending on the goal of the reconstruction, the origin of the offset, and tools or methods available to tackle the job. All of these must be taken into account in developing the best approach to solving the problem in the most efficient manner. In this research, the implementation of NURBS method is used because it brings the most convincing results.

关键词： Design automation Surface fitting Curve fitting Computational geometry

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Proceedings of the IEEE International Workshop on Research Issues in Data engineering: Preface

Proceedings of the IEEE International Workshop on Research I...

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Proceedings of the IEEE International Workshop on Research Issues in Data engineering 2005年 vii页

作者： Han, Jiawei Kawano, Hiroyuki Kunishima, Takeo Rusinkiewicz, Marek Elmagarmid, Ahmed Urban, Joseph Department of Computer Science University of Illinois Urbana-Champaign United States Department of Information and Telecommunication Engineering Nanzan University Japan Faculty of Information Science and System Engineering Okayama Prefectural University Japan

No abstract available

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Probabilistic power flow methodology for the modeling of horizontally-operated power systems

Probabilistic power flow methodology for the modeling of hor...

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International Conference on Future Power systems

作者： G. Papaefthymiou A. Tsanakas D. Kurowicka P.H. Schavemaker L. van der Sluis Electrical Power System Laboratory (EPS) Faculty of Electrical Engineering Mathematics & Computer Science Delft University of Technnology Delft Netherlands Lloyďs of London London UK Institute for Applied Mathematics Faculty of Electrical Engineering Mathematics & Computer Science Delft University of Technnology Delft Netherlands

Stochastic generation is expected to take a large share of the energy production in future power systems. Two basic features of this type of generation distinguish it from the traditional centralized, conventional generation: it is highly distributed (large number of small-scale generators) and non-dispatchable (use of an uncontrolled prime mover). The incorporation of such power sources in the lower system levels leads to a new horizontal structure of the power system, where the distribution networks contain both uncertain stochastic generation and load. For the analysis of such systems, the use of a probabilistic approach is necessary. There are two basic problems with the probabilistic formulation of this problem: the large number of random variables involved in the analysis and the presence of complex dependencies between the system inputs. In this contribution, a two-step method is presented for the stochastic modeling of the system: first, clusters of positively correlated variables are defined and modeled based on the concepts of perfect correlation (comonotonicity), and then the exact correlations between these clusters are modeled based on a new proposed technique, the joint normal transform methodology. This powerful computational method can be easily applied to large systems with a high number of stochastic generators. The proposed method has been implemented and applied for the 5-bus/7-branch test system (Hale network) with a high penetration of wind generation. The results are presented in the paper

关键词： Power system modeling Load flow Stochastic systems Power generation Distributed power generation Wind energy generation Production systems Power system analysis computing Random variables system testing

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A test structure for spatial analysis of hot-carrier-induced photoemission in n-MOSFET

A test structure for spatial analysis of hot-carrier-induced...

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ICMTS 2005 - 2005 IEEE International Conference on Microelectronic Test Structures

作者： Matsuda, Toshihiro Tanaka, Tsubasa Iwata, Hideyuki Ohzone, Takashi Yamashita, Kyoji Koike, Norio Tatsuuma, Ken-Ichiro Department of Electronics and Informatics Toyama Prefectural University Kurokawa Kosugi-machi Imizu-gun Toyama 939-0398 Japan Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja-Shi Okayama 719-1197 Japan ULSI Process Technology Development Center Semiconductor Company Matsushita Electric Ind. Co. Ltd. 19 Nishikujo-kasugacho Minami-ku Kyoto 601-8413 Japan

A test structure and method for two-dimensional analysis of hot-carrier-induced photoemission in n-MOSFETs are presented. Photoemission intensity profiles along the gate width direction are analyzed and a method to derive the precise peak position of photoemission intensity from the center of MOSFETs gate is proposed. It can measure the variation of the photoemission peak position along the gate width direction. The peak exists in the LDD region, and the distance from the gate edge is about 20-30 nm independently of V G. © 2005 IEEE.

关键词： Photoemission

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