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IEEE EMBS International Conference on Information Technology Applications in Biomedicine (ITAB)

作者： Hyung Gyu Lim Ki Woong Seong Eui Sung Jung Jyung Hyun Lee Jae Hoon Park Hee Joon Park Chulho Won Jin Ho Cho Graduate School of Electrical Engineering and Computer Science Kyungpook National University Daegu Republic of Korea Institute of Biomedical Engineering Research Kyungpook National University Daegu Republic of Korea Department of Biomedical Engineering Kyungpook National University Hospital Daegu Republic of Korea Division of Electricity and New & Renewable Energy Yeungjin College Daegu Republic of Korea Department of Biomedical Engineering Keimyung University Daegu Republic of Korea Department of High Tech. Medical System Kyungil University Gyeongsan Republic of Korea School of Electronics Engineering Kyungpook National University Daegu Republic of Korea

ISBN: (纸本)9781457721762

A new implantable hearing device, which vibrates round window (RW) of human cochlea, has been widely developed in the world. This device has been remarkable owing to compensate conductive hearing loss of hearing impaired people which was damaged their ossicles. Recently, piezoelectric actuator has been applied to RW drive type hearing devices because of flat and excellent vibrational characteristics at audible frequency range. However, in case of the RW vibration, patients cannot hear natural sound because the auditory pathway don't include middle ear. And human middle ear has resonant characteristics. Thus, piezoelectric vibrators need the resonance corresponding to the middle ear characteristics for hearing natural sound.

关键词： Auditory system Ear Humans Vibrations Actuators Resonant frequency Computational efficiency

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A 657-nm narrow bandwidth interference filter-stabilized diode laser

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Chinese Optics Letters 2011年第4期9卷 46-47页

作者：王正博吕晓凯陈景标 Joint Institute of Metrological Science Department of PhysicsTsinghua University Institute of Quantum Electronics and State Key Laboratory of Advanced Optical Communication System and NetworkSchool of Electronics Engineering and Computer SciencePeking University State Key Laboratory of Precision Spectroscopy East China Normal University

We present a 657-nm external cavity diode laser （ECDL） system, where the output frequency is stabilized by a narrow-band high transmission interference filter. This novel diode laser system emits laser with an insta... 详细信息

关键词： Semiconductor lasers

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Multi-threshold second-order phase transition in laser

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Chinese Science Bulletin 2011年第35期56卷 3812-3816页

作者： ZHUANG Wei YU DeShui LIU ZhiWen CHEN JingBiao Institute of Quantum Electronics and State Key Laboratory of Advanced Optical Communication System ＆ Network School of Electronics Engineering ＆ Computer Science Peking University Beijing 100871 China Department of Electrical Engineering The Pennsylvania State University University Park PA 16802 USA

We present a theory of the multi-threshold second-order phase transition,and experimentally demonstrate the multi-threshold secondorder phase transition *** carefully selected parameters,in an external cavity diode laser system,we observe secondorder phase transition with multiple(three or four) thresholds in the measured power-current-temperature three dimensional phase *** controlled death and revival of second-order phase transition sheds new insight into the nature of ubiquitous secondorder phase *** theory and experiment show that the single threshold second-order phase transition is only a special case of the more general multi-threshold second-order phase transition,which is an even richer phenomenon.

关键词：二阶相变多阈值激光相变激光器系统二极管实验外腔

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Compensation of DC-Link Oscillation in Single-Phase to Single-Phase VSC/CSC and Power Density Comparison

Compensation of DC-Link Oscillation in Single-Phase to Singl...

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IEEE Energy Conversion Congress and Exposition

作者： Montie A. Vitorino Ruxi Wang Mauricio B. R. Correa Dushan Boroyevich Laboratory of Industrial Electronics and Machine Drive (LEIAM) Department of Electric Engineering and Informatics Federal University of Campina Grande Campina Grande - PB - Brazil Center for Power Electronics System (CPES) The Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg - VA - USA

ISBN: (纸本)9781467308021

This work proposes a technique to reduce the low frequency DC-link energy oscillation due to the pulsating singlephase energy flow in a single-phase to single-phase Voltage Source Converter (VSC) and Current Source Converter (CSC) which operate connected to the grid. That pulsating energy is the major responsible for increasing the size of the passive components and power losses in the converter. The pulsation reduction is achieved by incorporating two auxiliar active switches and one passive energy storage element to the rectifier and inverter side. Additionally, this paper presents the comparison of these convertes regarding efficiency and power density. Details control strategy is presented. Simulation and experimental results are provided to validate the theoretical approach.

关键词： DC-Link VSC CSC

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25.1: Luminance Probes for Contrast Measurements in Medical Displays

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SID Symposium Digest of Technical Papers 2012年第1期34卷

作者： Aldo Badano Scott Pappada Edward F. Kelley Michael J. Flynn Sandrine Martin Jerzy Kanicki Medical Imaging and Computer Applications Branch Center for Devices and Radiological Health U.S. Food and Drug Administration Department of Biomedical Engineering Marquette University Electricity Division Electronics and Electrical Engineering Laboratory Technology Administration U.S. Department of Commerce Department of Radiology Henry Ford Health System Department of Electrical Engineering and Computer Science University of Michigan

We report on a comparative study that examines four conic luminance probes in their ability to measure small-spot display contrast. We performed linear scans of a slit using a computer-controlled stage. We found that, although the probes were assembled according to the same design, small differences in their performance due to minor variations in materials and surfaces can be measured.

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Additional data transmission scheme for the ATSC terrestrial DTV systems based on a low rate systematic irregular repeat-accumulate code

Additional data transmission scheme for the ATSC terrestrial...

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IEEE International Symposium on Broadband Multimedia systems and Broadcasting

作者： Kang, Donghoon Lee, Yongwook Ko, Kwangjun Park, Sung Ik Kim, Heung Mook Oh, Wangrok Department of Electrical and Computer Engineering Chungnam National University Daejeon 305-764 Korea Republic of Broadcasting System Research Group Electronics and Telecommunications Research Institute Daejeon 305-700 Korea Republic of

ISBN: (纸本)9781612841229

In this paper, we propose an additional data transmission scheme for the ATSC (Advanced Television systems Committee) terrestrial DTV (digital television) systems based on a low rate systematic irregular repeat-accumulate (SIRA) code. Unlike the previously proposed additional data transmission scheme using TxID (transmitter identification) signals, the proposed scheme conjuncted with a DTV VSB signal cancellation technique is suitable for high data transmission. Compared to the previous additional data transmission scheme based on a low rate systematic repeat-accumulate code, the BER performance of the proposed scheme is significantly improved. The additional data is encoded with a simplified IRA channel coding scheme and injected to the conventional VSB signals with the bury ratio (BR) of 27 dB. With the proposed scheme, an additional data of rate up to 1 Mbps can be transmitted along with the ATSC terrestrial DTV signals by minimizing the detrimental effects on the ATSC terrestrial DTV systems. © 2011 IEEE.

关键词： Digital television

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Non-reference virtual view quality evaluation of MVD

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Journal of Shanghai University(English Edition) 2011年第4期15卷 342-346页

作者：张艳安平张秋闻王元庆张兆杨 School of Communication and Information Engineering Shanghai University Department of Computer Science and Technology Anhui University of Finance and EconomicsBengbu 230030AnhuiP.R.China Key Laboratory of Advanced Display and System Application (shanghai University) Ministry of Education Department of Electronics Science and Engineering Nanjing University

The quality of virtual view based on multi-view video （MVD） plus depth format is often evaluated by PSNR or subjectively judged. However, due to synthesizing arbitrary view images, the virtual view images mostly have no reference images and are only assessed using non-reference. Virtual view images synthesized by depth estimation reference software （DERS） and view synthesis reference software （VSRS） often accompanied with blockiness and other distortions on the edge. In addition, matching level for the depth map and the corresponding texture maps of left and right views also affects the quality of the virtual view. This paper compares the edge similarity of the depth and the corresponding texture maps which generate the intermediate virtual view and combined with the virtual view＇s blockiness which causing blur to evaluate the quality of the virtual view. Experiment results show that the proposed method can reflect the quality of the virtual view better.

关键词： non-reference quality evaluation virtual view multi-view video （MVD） plus depth free viewpoint television （FTV）

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Feasibility implementation of voltage-current waveform telemetry system in power delivery system

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IEEJ Transactions on Fundamentals and Materials 2011年第4期131卷 288-294+10页

作者： Furukawa, Tatsuya Akagi, Keita Fukumoto, Hisao Itoh, Hideaki Wakuya, Hiroshi Hirata, Kenji Ohchi, Masashi Graduate School of Science and Engineering Saga University 1 Honjo-machi Saga 840-8502 Japan Department of Electric Control System NITTETSU ELEX CO. LTD. 1320-4 Maeda Outsuka Yahata-Higashi-ku Kitakyushu 805-8555 Japan Department of Electrical Electronics and Computer Engineering Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino 275-0016 Japan

The electric power is indispensable for modern life. However, there is a problem of harmonic disturbance when the harmonic power runs into electronic devices. To overcome the problem and realize a stable supply of the electric power is an important issue. In this study, we have developed a voltage-current waveform telemetry system for the remote measurement of the harmonics in the power delivery lines. The system consists of sensors, preamplifiers, a single board computer, and power collectors. Improvements are made on all of these components except the sensors. The power collector is a coil that can be placed around the same power line that we measure. We have designed the power collector by a finite element method(FEM) so that it can provide enough electricity for the computer to work properly. Thus, no other power source such as a battery except the secondary rechargeable battery for the recovery is necessary at the measurement place. The preamplifier in the new system is a single-supply differential amplifier circuit, and the single board computer has an inexpensive SH-3 CPU. Through experiments, we have confirmed that the power collector can provide sufficient electricity and that the new system can successfully measure the waveforms and the harmonics in power delivery systems. © 2011 The Institute of Electrical Engineers of Japan.

关键词： Embedded systems

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Recommendation algorithm based on graph-model considering user background information

Recommendation algorithm based on graph-model considering us...

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International Conference on Creating, Connecting and Collaborating Through Computing

作者： Wang, Ziqi Zhang, Ming Tan, Yuwei Wang, Wenqing Zhang, Yuexiang Chen, Ling School of Electronics Engineering and Computer Science Peking University Beijing 100871 China Department of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong Hong Kong National Administrative Center for CALIS China Academic Library Information System Peking University Library Beijing 100871 China

ISBN: (纸本)9780769543635

With the development of information technologies and increase scale of digital resources, personalized recommendation systems have come into the big picture of web2.0 technology. This paper proposed a graph-based recommendation algorithm using the user-resource rating data to construct a graph model and improves the model by adding user background information. The Random Walk with Restarts algorithm is applied to generate the final recommendation set. The improvement in accuracy on sparse data is illustrated by the experiments on the Movie Lens data set, comparing with the collaborative filtering algorithm. © 2011 IEEE.

关键词： Collaborative filtering

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3DV quality model based depth maps for view synthesis in FTV system

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Journal of Shanghai University(English Edition) 2011年第4期15卷 335-341页

作者：张秋闻安平张艳张兆杨王元庆 Key Laboratory of Advanced Display and System Application (Shanghai University) Ministry of EducationShanghai 200072P.R.China School of Communication and Information Engineering Shanghai University Department of Computer Science and Technology Anhui University of Finance and EconomicsBengbu 230030AuhuiP.R.China Department of Electronics Science and Engineering Nanjing University

Depth maps are used for synthesis virtual view in free-viewpoint television （FTV） systems. When depth maps are derived using existing depth estimation methods, the depth distortions will cause undesirable artifacts in the synthesized views. To solve this problem, a 3D video quality model base depth maps （D-3DV） for virtual view synthesis and depth map coding in the FTV applications is proposed. First, the relationships between distortions in coded depth map and rendered view are derived. Then, a precisely 3DV quality model based depth characteristics is develop for the synthesized virtual views. Finally, based on D-3DV model, a multilateral filtering is applied as a pre-processed filter to reduce rendering artifacts. The experimental results evaluated by objective and subjective methods indicate that the proposed D-3DV model can reduce bit-rate of depth coding and achieve better rendering quality.

关键词： free-viewpoint television （FTV） 3D video quality model base depth maps （D-3DV） view synthesis

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