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Non-adiabatic losses in fused fiber couplers-experimental findings

Non-adiabatic losses in fused fiber couplers-experimental fi...

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2002 5th IEEE International Conference on Semiconductor Electronics, ICSE 2002

作者： Shaarj, Ahmad Zaki Abdullah, Mohd. Khazani Shaarj, Sahbudin Photonics Technology Laboratory Department of Electrical Electronics and System Engineering Universit i Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia Photonics Laboratoiy Department of Computer and Communication Systems Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia

ISBN: (纸本)0780375785

Bi-conically tapered single-mode couplers are fabricated using a fiber fusion coupler workstation. Losses found during fabrication are analyzed for a range of elongation. It is found that longer elongations will lower the losses. Theoretically, the losses are due to the taper paths crossing delineating curves. These losses which occur during tapering process are not really adiabatic if part of the signal power is not guided at the end of tapering process. In other words, taper path will not be inside adiabatic region of cladding guidance. It will cross from core-guidance region into lossy region or non-adiabatic region of cladding guidance.

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A method of printing Tibetan character recognition

A method of printing Tibetan character recognition

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World Congress on Intelligent Control and Automation (WCICA)

作者： Shaoping Ma Yijiang Jin Zhe Jiang Yu Huang National Key Laboratory of Intelligence Technology and System Department of Computer Tsinghua University Beijing China Department of Computer North Communication University Beijing China

Due to the lack of research in the field of minority nationality character recognition, printing Tibetan character recognition was studied as an example in this paper. An experimental system was set up by applying fuzzy direction line features, which performs very effectively in the off-line Chinese character recognition, into printing Tibetan characters recognition. It can be seen from this primary study that this method is effective in printing Tibetan recognition.

关键词： Printing Character recognition Fuzzy systems Feature extraction Intelligent control Automation

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Unit-Cell Modeling of High-Speed Interconnect with Adjacent Metal-Filled Via Array using FDTD method

Unit-Cell Modeling of High-Speed Interconnect with Adjacent ...

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IEEE Workshop on Signal Propagation on Interconnects (SPI)

作者： Heeseok Lee Charlie Park Derek Kam Joungho Kim Terahertz Media and System Laboratory Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology Taejon South Korea

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A multimedia semantic model for RTSP-based multimedia presentation systems 4

A multimedia semantic model for RTSP-based multimedia presen...

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4th International Symposium on Multimedia Software Engineering, MSE 2002

作者： Chen, Shu-Ching Li, Sheng-Tun Shyu, Mei-Ling Zhan, Chengjun Zhang, Chengcui Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33199 United States Department of Information Management National Kaohsiung First University of Science and Technology Juoyue Rd. Nantz District Kaohsiung811 Taiwan Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States

ISBN: (纸本)0769518575

An abstract multimedia semantic model called the multimedia augmented transition network (MATN) model is proposed to model the RTSP-based (real-time streaming protocol) multimedia presentation systems. RTSP provides a set of methods to support the functionality of "VCR-like" remote control on the client side so that users are allowed to control playback of the streaming media. The MATN model is used to model RTSP actions as well as temporal relations and synchronization control of the media streams. The advantages of using the MATN model are its simplicity, effectiveness, and ease of modification. Furthermore, a formal definition of the MATN model and modeling of RTSP actions using the MATN model are presented in detail. © 2002 IEEE.

关键词： Remote control

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Interconnection of autonomous error-tolerant cells

Interconnection of autonomous error-tolerant cells

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： T. Valtonen T. Nurmi J. Isoaho H. Tenhunen Turku Center for Computer Science Turku Finland Laboratory of Electronics and Information Technology Department of Applied Physics University of Turku Turkey Electronic System Design Laboratory Department of Electronics Royal Institute of Technology Stockholm Sweden

In this paper we propose an interconnection scheme for the autonomous error-tolerant (AET) cell introduced in a paper by Valtonen et al. (2001). The objective here is to partition the system into identical, physically autonomous and highly configurable cells that can operate without outside control or synchronization. In billion transistor Network-on-Chip (NoC) circuits, an AET cell fabric could prove highly flexible and reliable, and allow for low replication costs, due to homogeneousity. However, many challenges persist before a useful system can be constructed: the need for (i) scalable long-distance communication-global bus wiring fits poorly into a homogeneous, symmetric fabric and limits scalability, (ii) flexible communication-cells in all directions, within a given range, should be accessible and (iii) self-synchronizing topologies, due to the absence of external synchronization; (iv) the interconnect scheme is to be implemented using near-future technology generations, and (v) the fabric should be efficient when constituting billions of cells.

关键词： Integrated circuit interconnections Fabrics Network-on-a-chip Communication system control Control systems Flexible printed circuits Telecommunication network reliability Costs Wiring Scalability

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A novel hierarchical approach to image retrieval using color and spatial information 3rd

A novel hierarchical approach to image retrieval using color...

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3rd IEEE Pacific Rim Conference on Multimedia, PCM 2002

作者： Li, Xiuqi Chen, Shu-Ching Shyu, Mei-Ling Li, Sheng-Tun Furht, Borko Department of Computer Science and Engineering Florida Atlantic University Boca RatonFL33431 United States Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33199 United States Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States Department of Information Management National Kaohsiung First University of Science and Technology Juoyue Rd Nantz District Kaohsiung811 Taiwan

ISBN: (纸本)3540002626

A novel hierarchical approach to image retrieval is proposed. First, a color label histogram is used to effectively filter out the images that are not similar to the query image in color. The proposed color label histogram built by categorizing the pixel colors is computationally much more efficient compared to other approaches. Next, the class parameters of those images passing the first filter are used to identify the images similar to the query image in spatial layout. These class parameters are obtained automatically from the proposed unsupervised segmentation algorithm. Moreover, the wavelet decomposition coefficients are used to generate the initial partition for the segmentation algorithm. It doubles the segmentation performance. At the last stage, all images passing two filters are ranked based on the total normalized distance in color and spatial layout. The experiments show the effectiveness and efficiency of our approach. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Color

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Anaphora resolution in Chinese financial news for information extraction

Anaphora resolution in Chinese financial news for informatio...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Ning Wang Chunfa Yuan K.F. Wong Wenjie Li Department of Computer Science & Technology State Key Laboratory of Intelligent Technology and System Tsinghua University Beijing China Department of System Engineering & Engineering Management Chinese University of Hong Kong Hong Kong China Department of Computing Hong Kong Polytechnic University Hong Kong China

Anaphora always appears in the text and it is a hot topic in linguistics and computational linguistics area. Anaphora resolution is an important part of the information extraction, and it is also important to discourse understanding, machine translation, abstract extraction and so on. After studying on the text in Chinese financial domain, an anaphora resolution system is proposed, which is built on a set of filtration rules and a set of evaluation rules. The experiment result shows the precision is 91.4%.

关键词： Data mining Laboratories Intelligent systems computer science systems engineering and theory Research and development management Computational linguistics Filtration Intelligent control Automation

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Intelligent diagnosis method for plant machinery using wavelet transform, genetic programming and possibility theory

Intelligent diagnosis method for plant machinery using wavel...

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IEEE Region 10 International Conference TENCON

作者： Peng Chen T. Horie T. Toyota Zhengjia He Faculty of Computer Science and System Engineering Kyushu Institute of Technology Iizuka Fukuoka Japan Japan Condition Diagnosis Technology Laboratory Incorporated Kitakyushu Japan Department of Mechanical Engineering Xi‘an Jiaotong University Xi‘an China

This paper proposes an intelligent diagnosis method for plant machinery using wavelet transform (WT) genetic programming (GP) and possibility theory. The WT is used to extract feature spectra of each machine state from measured vibration signal for distinguishing faults. Excellent symptom parameters (SP) for detecting fault states are automatically generated by GP. The membership functions of symptom parameters are established using possibility theory for resolving the ambiguous diagnosis problems. The methods proposed in this paper are verified by applying them to the fault diagnosis of gear equipment.

关键词： Machine intelligence Machinery Wavelet transforms Genetic programming Possibility theory Vibration measurement Fault diagnosis Feature extraction Fault detection Signal resolution

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Modeling and simulation of hybrid dynamical systems with generalized differential Petri nets

Modeling and simulation of hybrid dynamical systems with gen...

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IEEE International Symposium on Intelligent Control (ISIC)

作者： Yali Wu Weimin Wu Jianchao Zeng Guoji Sun Hongye Su Jian Chu System Engineering Institute Xi''an Jiaotong University Xi'an China Institute of Advanced Process Control National Laboratory of Industrial Control Technology Zhejiang University Hangzhou China Division of System Simulation and Computer Application Taipan Heavy Machinery Institute Taipan China

There has been considerable interest in the modeling and simulation of hybrid dynamic systems (HDS). As an effective modeling tool of discrete event dynamic systems, Petri nets have a dual nature of a graphical tool and a mathematical object. In this paper, an extension of Petri net named generalized differential Petri nets (GDPN) is proposed to model HDS that have a combination of discrete-event evolution and continuous state evolution. Differential place and differential transition defined by Demongodin et al. (1998) are used to model the numeral simulation of the continuous dynamic process, and the weights defined on the directed arcs that connects the differential transitions and places are extended from real numbers to real matrices. The marking of differential place are also enlarged from real numbers to real vectors. Then the evolution rules and modeling method of HDS with GDPN are introduced. Two examples are used to illustrate the modeling power of GDPN in HDS.

关键词： Petri nets Power system modeling Supervisory control Discrete event systems Process control Computational modeling computer simulation Mathematical model Chemical processes Continuous time systems

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Intelligent Diagnosis Method for Plant Machinery Using Wavelet Transform, Genetic Programming and Possibility Theory

Intelligent Diagnosis Method for Plant Machinery Using Wavel...

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2002年IEEE十区计算机、通信、控制和电机工程会议

作者： Tomoyoshi HORIE Toshio TOYOTA Faculty of Computer Science and System Engineeing Kyushu Institute of Technology 680-4 Kawazu lizuka Fukuoka Japan. Japan Condition Diagnosis Technology Laboratory incoryorated.3-11-1 Takasuhigashi Wakamatu-ku Kitakyushu Japan

This paper proposes an intelligentdiagnosis method for plant machinery using wavelettransform (WT) genetic programming (GP) andpossibility theory. The WT is used to extract featurespectra of each machine state from measured vibrationsignal for distinguishing faults. Excellent symptomparameters (SP) for detecting fault states areautomatically generated by GP. The membershipfunctions of symptom parameters will be establishedusing possibility theory for resolving the ambiguousdiagnosis problems. The methods proposed in thispaper are verified by applying them to the faultdiagnosis of gear equipment.

关键词： condition monitoring fault diagnosis of machinery wavelet transform genetic programming (GP) possibility theory gear drive

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