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Ubiquitous Sensor Network for Chemical Sensors

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稀有金属材料与工程 2006年第A3期35卷 400-404页

作者： Wan-Young Chung Risto Myllylae Division of computer & Internet eng. Dongseo UniversityBusan 617-716Korea dept.of electrical and Information eng. University of OuluLinnanmaa 90570 OuluFinland

Wireless sensor networks have been identified as one of the most important technologies for the 21 st *** advances in micro sensor fabrication technology and wireless communication technology enable the practical deployment of large-scale,low-power,inexpensive sensor *** an approach offers an advantage over traditional sensing methods in many ways:large-scale,dense deployment not only extends spatial coverage and achieves higher resolution,but also increases the system's fault-tolerance and ***,the ad-hoc nature of wireless sensor networks makes them even more attractive for military and other risk-associated applications,such as environmental observation and habitat monitoring.

关键词： ubiquitous sensor network wireless sensor network sensor network platform sensor node chemical sensors

Novel Propagation Analysis of Coupled Waveguides by Coupled Mode Expansion and Segmentation

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光学学报 2003年第S1期23卷 275-276页

作者： Tomoyuki Kato Yasuo Kokubun Yokohama Nat'l Univ. Graduate school of Eng. Dept. of Electrical and Computer Eng. 240-8501 79-5 Tokiwadai Hodogaya-ku Yokohama JapanYokohama Nat'l Univ. Graduate school of Eng. Dept. of Electrical and Computer Eng. 240-8501 79-5 Tokiwadai Hodogaya-ku Yokohama Japan

To optimize the coupling efficiency between the busline waveguide and the ring resonator in a vertically coupled microring resonator, we developed a new method using local normal modes and the segmentation along the p... 详细信息

关键词： by in of mode

Wind Generator Stabilization with Doubly-Fed Asynchronous Machine

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Journal of Shanghai Jiaotong university(Science) 2007年第2期12卷 271-282页

作者：武黎王志新 dept.of electrical eng. Shanghai Jiaotong Univ.

This paper investigates the function of doubly-fed asynchronous machine(DASM)with emphasis placed on its ability to the stabilization of the power system including wind generators.P(active power)and Q(reactive power)compensation from DASM can be regulated independently through secondary-excitation *** results by power system computer aided design(PSCAD)show that DASM can restore the wind-generator system to a normal operating condition rapidly even following severe transmission-line *** studies have also been performed between wind turbine pitch control and proposed method.

关键词：发电机涡轮音调控制计算机功率系统半自动设计

Robot navigation system using intrinsic evolvable hardware

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Journal of Harbin Institute of Technology(New Series) 2001年第3期8卷 261-266页

作者： TAN K C, LEE T H, RUK X, WANG L F, LIU X (dept. of electrical and computer eng.neering, National University of Singapore, Singapore 119260) dept. of Elec. and Comp. eng. Natl. Univ. of Singapore Singapore 119260 Singapore

Recently there has been great interest in the idea that evolvable system based on the principle of artifcial intelligence can be used to continuously and autonomously adapt the behaviour of phy.ically embedded systems such as autonomous mobile robots and intelligent home devices. Meanwhile, we have seen the introduction of evolvable hardware(EHW): new integrated electronic circuits that are able to continuously evolve to adapt the chages in the environment implemented by evolutionary algorithms such as genetic algorithm(GA) and reinforcement learning. This paper concentrates on developing a robotic navigation system whose basic behaviours are obstacle avoidance and light source navigation. The results demonstrate that the intrinsic evolvable hardware system is able to create the stable robotiiuc behaviours as required in the real world instead of the traditional hardware systems.

关键词： genetic algorithm autonomous mobile robot boolean function controller intrinsic evolvable hardware

A NEW UEP SCHEME FOR ROBUST VIDEO TRANSMISSION IN LDPC CODED MIMO-OFDM SYSTEM

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Journal of Electronics(China) 2007年第3期24卷 396-401页

作者： Ru Congchong Zheng.Haifeng.Yin Liuguo Lu Jianhua Chen Changwen Department of Electronic eng.neering Tsinghua University Beijing 100084 China College of Information Technology Fuzhou University Fuzhou 350002 China dept. electrical ＆ computer eng. Florida Institute of Technology Melbourne FL 32040 USA

In order to improve the video transmission performance in Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system,a new scheme,which integrates Multiple Description Coding (MDC),Low Density Parity Check (LDPC) coding and hybrid space time coding,is proposed in this letter. In particular,a hybrid space time coding algorithm is combined with LDPC codes to perform Unequal Error Protection (UEP) of MDC encoded video streams. Comparing with the UEP transmission with only LDPC codes,the proposed scheme achieves more than 1dB gain in terms of Signal to Noise Ratio (SNR) when the Peak Signal to Noise Ratio (PSNR) of reconstructed video is above 30dB.

关键词： MIMO-OFDM系统 LDPC编码鲁棒性视频传输 UED方案

TREATMENT OF METALS, POLYMER FILMS, AND FABRICS WITHA ONE ATMOSPHERE UNIFORM GLOW DISCHARGE PLASMA(OAUGDP) FOR INCREASED SURFACE ENERGY AND DIRECTIONAL ETCHING

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Acta Metallurgica Sinica(eng.ish Letters) 2001年第6期14卷 391-407页

作者： J. Reece Roth and Z. Y Chen (Plasma Sciences Laboratory, Department of electrical and computer eng.neering, University of Tennessee, Knoxville, TN 37996-2100, USA) Peter P.- Y Tsai (Textiles and Nonwovens Development Center (TANDEC), University of Tenness Plasma Sci. Lab. Dept. of Elect. and Comp. Eng. Univ. of Tennessee Knoxville TN 37996-2100 United States

Direct exposure of samples to the active species of air generated by a One Atmosphere Uniform Glow Discharge Plasma (OAUGDP) has been used to etch and to increase the surface energy of metallic surfaces, photoresist, polymer films, and nonwoven fab- rics. The OAUGDP is a non-thermal plasma with the classical characteristics of a DC normal glow discharge that operates in air (and other gases) at atmospheric pres- sure. Neither a vacuum system nor batch processing is necessary. A wide range of applications to metals, photoresist, films, fabrics, and polymeric webs can be accom- modated by direct exposure of the workpiece to the plasma in parallel-plate reactors. This technolopy is simple, it produces effects that can be obtained in no other way at one atmosphere; it generates minimal pollutants or unwanted by-products; and it is suitable for individual sample or online treatment of metallic surfaces, wafers, films, and fabrics. Early exposures of solid materials to the OAUGDP required minutes to produce rela- tively small increases of surface energy. These durations appeared too long for com- mercial application to fast-moving webs. Recent improvements in OAUGDP gas com- position, power density, plasma quality, recireulating gas flow, and impedance match- ing of the power supply to the parallel plate plasma reactor have made it possible to raise the surface energy of a variety of polymeric webs (PP, PET PE etc.) to levels of 60 to 70 dynes/cm with one second of exposure. In air plasmas, the high surface ener- gies are not durable, and fall to 50 dynes/cm after periods of weeks to months. Here, we report the exposure of metallic surfaces, photoresist, polymeric films, and nonwo- ven fabrics made of PP and PET to an impedance matched parallel plate OAUGDP for durations ranging from one second to several tens of seconds. Data will be re- ported on the surface energy, wettability, wickability, and aging effect of polymeric films and fabrics as functions of time of exposur

关键词： atmosphere glow discharge plasma surface energy etching of material surface

A Wireless Sensor Network Platform for Elderly Persons at Home

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稀有金属材料与工程 2006年第A3期35卷 95-99页

作者： Young-Dong Lee Dae-Seok Lee Wan-Young Chung Risto Myllylae dept.of computer Network eng Graduate School of SoftwareDongseo UniversityBusan 617-716Korea Division of computer & Information eng Dongseo UniversityBusan 617-716Korea dept.of electrical and Information eng.neering University of OuluLinnanmaa 90570 OuluFinland

A small size ubiquitous healthcare system for the home care of elderly persons was designed and *** system comprised a wireless sensor network node,base station and server computer for the continuous monitoring of ECG *** data,an important vital sign that is commonly used in clinical and trauma care,were displayed on a graphical user interface (GUI) by transferring the data to a PDA or a terminal *** data transfer was accomplished through a base-station connected to a server computer using TCP/***-time ECG data of elderly persons or patients,as well as historical data,can also be retrieved and played back to assist the *** ubiquitous healthcare system presented in this study can effectively reduce social medical expenses,which will increase greatly in the aging society.

关键词： wireless sensor network ubiquitous healthcare ECG TinyOS platform

MAGNETICALLY-TUNABLE SPIN-SELECTIVE POSITIONING OF WAVE FUNCTIONS IN SYMMETRIC MULTIPLE QUANTUM WELLS

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MAGNETICALLY-TUNABLE SPIN-SELECTIVE POSITIONING OF WAVE FUNC...

Networked and Quantized Control Systems with Communication Delays

第8届国际材联电子材料国际研讨会

作者： S.Lee M.Dobrowoiska J.K.Furdyna L.R.Ram-Mohan Department of phy.ics Korea University Seoul 136-701 Korea Department of phy.ics University of Notre Dame Notre Dame IN 46556 Department of phy.ics University of Notre Dame Notre Dame IN 46556 dept. of phy. and electrical and computer eng. Worcester Polytechnic Institute Worcester MA 01609 USA

＜正＞ The wave function distribution of the lowest coupled states in symmetric multiple quantum wells （QWs） shows rather surprising distributions, where some states are localized only in certain wells, and are totally absent, in other wells. Such wave function profile, however, cannot normally be confirmed experimentally in those complex systems. We have used diluted magnetic semiconductors （DMSs） to demonstrate such interesting phenomenon experimentally. We have fabricated triple and quintuple QW systems consisting of

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Networked and Quantized Control Systems with Communication D...