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IEEE Vehicular technology Conference

作者： Hironobu Hatamoto Satoru Shimizu Yasuhiro Kanaoka Ikuo Yamashita Wireless Technology R&D Department Oki Electric Industry Co. Ltd. 3-4 Hikari-no-oka Yokosuka-shi Kanagawa 239-0847 Japan Power Engineering R&D Center Kansai Electric Power Co. Inc. 3-11-20 Nakoji Amagasaki-shi Hyogo 661-0974 Japan

ISBN: (纸本)9781467309899

This paper proposes a measurement scheme for power delay profiles using IEEE 802.11g based wireless packets in the 2.4 GHz band. In the proposed scheme, first, a signal analyzer, which can save the received Ich and Qch signals, receives the OFdM based packets sent from a wireless access point to a mobile terminal. Second, positions of long preambles in the received IQ data are detected in the cross correlation process using a known long preamble signal between a transmitter and a receiver. Third, the power delay profile is calculated by averaging the channel impulse responses, which are estimated from the received long preamble signals. Computer simulations confirm that the proposed scheme can be expected to achieve almost the same performance with PN sequence based measurement schemes.

关键词： A Study on Power delay Profile Measurement using IEEE 802.11g based Long Preamble Signals WLAN Systems at 2.4 GHz band power delay profile Measurement scheme Pseudonoise sequences signalling analyzer channel impulse response signals INSTITUTE OF ELECTrICAL ANd ELECTrONIC ENGINEErS based wireless local area network (WLAN) Computer Simulation Transmitters Bands Packet wireless

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Effect of chip die bonding on thermal resistance of high power LEds

Effect of chip die bonding on thermal resistance of high pow...

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Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITHErM)

作者： Tri Ayodha Hun Sik Han Joongnyon Kim Seo Young Kim Energy Mechanics Research Center Korea Institute of Science and Technology Seoul Korea HCI and Robotics University of Science and Technology Daejeon Korea Department of Mechanical Engineering Korea Advanced Institute of Science and Technology Daejeon Korea Display R&D Laboratory LG Electronics Seoul Korea

Thermal resistance of high power blue Light Emitting diode (LEd) package is experimentally examined. The LEd package consists of eight CrEE EZ900 chips. The dimension of each chip is 880 μm×880 μm and the metal board area is 30 mm×32 mm with 3 mm thickness. The LEd package is operated at the current of 11 A with 10 % duty cycle. To measure junction temperature, the forward voltage method is used. The metal board temperature is measured by attaching K-type thermocouple. Then, the thermal resistance from junction to metal board is calculated. For comparison, six identical LEd packages are examined. Each LEd package shows different thermal resistance from 0.4 K/W to 10.3 K/W. To investigate how the chips are well attached on the metal board, X-ray computed tomography (CT) images of the LEds are taken and air gap areas are evaluated. The result shows that the thermal resistance increases with the increase of air gap area.

关键词： Light emitting diodes Temperature measurement Thermal resistance Junctions Voltage measurement Metals

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What can be inferred from a tactile arrayed sensor in autonomous in-hand manipulation?

What can be inferred from a tactile arrayed sensor in autono...

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IEEE International Conference on Automation Science and engineering (CASE)

作者： Van Anh Ho Tatsuya Nagatani Akio Noda Shinichi Hirai Graduate School of Science and Engineering Ritsumeikan University Japan Mitsubishi Electric Corporation Advanced Technology R&D Center Japan Mitsubishi Denki Kabushiki Kaisha Chiyoda-ku Tokyo JP Ritsumeikan Daigaku Kyoto Kyoto JP

In this paper, we present a concept of using tactile sensors as sufficient tools in localizing, recognizing an object in robotic in-hand manipulation tasks. Our approach operates on a moderately intensive array data that are obtained from a tactile sensor when a robotic gripper grasps an object that is small relatively to fingers. In stead of using tactile data as an array of discrete numbers, we treat it as a grayscale image. By working with successive images from tactile sensor exploiting image processing tools, we are able to extract rich information about the contact condition between an object and the gripper. Experimental results show that from the processed data, we can realize the grasped object's position/orientation, contact shape, especially the stick-slip condition on the contact surface that is derived for the first time for this sensor. Based on localized displacement phenomenon of a sliding soft object, we proposed an approach to detect the slippage quantitatively, and conducted a wide range of experiment in term of characteristics of object's movement. We also conducted a model for an object-grasping gripper with tactile feedback in various postures of the object, and a corresponding experiment setup to validate computed results. Presented result is expected to be used widely in the community due to its simplicity and reliability.

关键词： robot sensing systems

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Optimization of incubation factors for fermentative hydrogen production from agricultural wastes

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Sustainable Environment research 2012年第2期22卷 99-106页

作者： Chuang, Yeong-Song Chen, Chin-Chao Lay, Chyi-How Sung, I-Yuan Wu, Jou-Hsien Lee, Shih-Chi Sen, Biswarup Lin, Chiu-Yue Department of Environmental Engineering and Science Feng Chia University Taichung40724 Taiwan Department of Landscape Architecture Chung Chou University of Science and Technology Changhwa51022 Taiwan Green Energy Development Center Feng Chia University Taichung40724 Taiwan Stone & Resource Industry R&D Center Hualien97356 Taiwan Green Energy and Eco-technology Center Industrial Technology Research Institute South Tainan73445 Taiwan Department of Water Resources Engineering Feng Chia University Taichung40724 Taiwan

Untreated agricultural wastes are most harmful to the environment. Three large quantities of agricultural wastes including water hyacinth, oil extraction residue and mushroom waste were selected to investigate the potential for biohydrogen production. A full factor experimental design was used to investigate the effects of four key environmental factors on the H2 production from these agricultural wastes with sewage sludge inoculum in batch fermentors. A two-level factorial design experiment was carried out to optimize the initial cultivation pH, substrate concentration, temperature and nutrient addition. All the three agricultural wastes showed hydrogen production potential via anaerobic fermentation using mixed microflora. The maximum hydrogen yield (HY) of 51 mL H2 g-1 substrate for mushroom waste and 17 mL H2 g-1 substrate for water hyacinth were obtained at pH 8.0, substrate concentration 30 g COd L-1, temperature 55 °C and without nutrient addition. The peak HY of 27 mL H2 g-1 substrate1 for oil extraction residue was obtained at pH 8.0, substrate concentration 15 g COd L-1, temperature 55 °C and without nutrient addition. According to signal to noise ratio analysis, the significant ones among the four tested factors for hydrogen production from the three agricultural wastes were nutrient addition and temperature. © 2012, Chinese Institute of Environmental engineering. All rights reserved.

关键词： Hydrogen production

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Implementation of sensor-embedded main wing model of ultra light airplane for health and usage monitoring system (HUMS) test-bed

Implementation of sensor-embedded main wing model of ultra l...

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Jae-Hoon Song Jae-Won Yang Mi-Sun rim Yoon-Young Kim i-Hwan Kim Hoon Park Jong-Nak Seok Chun-Gon Kim Yeong-Chul Lee Sun-Woo Choi Jang-Yeon Lee Aviation Safety R&D Center Korea Aerospace Research Institute Daejeon Korea Aviation Team Danam Systems Inc. Anyang Korea Department of Aerospace Engineering Korea Advanced Institute of Science and Technology Daejeon Korea Department of Electrical Engineering Hanyang University Seoul Korea

In this paper, development process of sensor-embedded main wing model as a test-bed of HUMS is described. Fiber Bragg Grating (FBG) Sensor, Plumbum-Zirconate-Titanate (PZT) Sensor, Acceleration Sensor, and Strain gauge are installed in the main wing. These sensors are located on the surface of the spar, the upper skin and the aileron of an ultra light airplane as a target aircraft. Each sensor is tested for operation status during the installation process.

关键词： Aircraft Fiber gratings Monitoring Aircraft manufacture Skin Safety

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Bioactive PLGA/TCP scaffolds incorporating phytoestrogenic molecule icaritin developed for bone defect repair

Bioactive PLGA/TCP scaffolds incorporating phytoestrogenic m...

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第六届国际骨质疏松及骨矿盐疾病学术会议

作者： Shi Hui Chen Ming Lei Ge Zhang Li Zhen Zheng Xin Hui Xie Xin Luan Wang Wei Li Zhe Zhao Xiao Hong Wang de Ming Xiao da Ping Wang Ling Qin Department of Orthopaedics & Traumatology The Chinese University of Hong Kong Department of Orthopaedics Shenzhen Hospital of Beijing University Department of Orthopedics The First Affiliated Hospital of Soochow University Translational Medicine R&D Center Institute of Biomedical and Health EngineeringShenzhen Institutes of Advanced TechnologyChinese Academy of Sciences

＜正＞Objective:The strategy presented in this study was incorporating BMP-2 or phytomolecule icaritin（ICT） into composite scaffold for bone *** fabricated novel bioactive scaffolds,namely PLGA/TCP/BMP-2 and PLGA/TCP/ICT with three dosages of ICT（L,M and H）. The hypothesis was that the original bioactivities of BMP- 2 or icaritin within scaffolds could be maintained,which would serve as a local delivery system for enhancement of bone regeneration. Methods:Scaffolds were fabricated at -28℃by a low-temperature rapid-prototyping machine using established *** scaffolds were divided into:P/T（A）,P/T/LICT

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PLGA/TCP/icaritin scaffolds enhance angiogenesis in bone defect healing

PLGA/TCP/icaritin scaffolds enhance angiogenesis in bone def...

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第六届国际骨质疏松及骨矿盐疾病学术会议

作者： ShiHui Chen Ming Lei Ge Zhang Li Zhen Zheng Xin Hui Xie Xin Luan Wang Wei Li Zhe Zhao Xiao Hong Wang de Ming Xiao da Ping Wang Yi Xiang Wang Ling Qin Department of Orthopaedics & Traumatology The Chinese University of Hong Kong Department of Orthopaedics Shenzhen Hospital of Beijing University Department of Orthopedics The First Affiliated Hospital of Soochow University Translational Medicine R&D Center Institute of Biomedical and Health EngineeringShenzhen Institutes of Advanced TechnologyChinese Academy of Sciences

Objective Treatment of large bone defect in routine orthopaedic clinics requires scaffold materials,especially desirable with composite material combined with therapeutic and bioactive agents for achieving better treatment *** strategy in this study was to develop such a bioactive biodegradable composite bone scaffold incorporating a phytomolecule icaritin(ICT) for bone *** investigate angiogenesis potentials of PLGA/TCP composite scaffolds incorporating ICT in bone defect repair process,the fabricated bioactive scaffolds,namely PLGA/TCP,PLGA/

关键词： PLGA/TCP/icaritin scaffolds enhance angiogenesis in bone defect healing

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Corrigendum to “Efficient bulk heterojunction photovoltaic devices based on diketopyrrolopyrrole containing small molecule as donor and modified PCBM derivatives as electron acceptors” [Organic Electronics 13 (2012) 652–666]

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Organic Electronics 2012年第9期13卷 1763-1764页

作者： G.d. Sharma J.A. Mikroyannidis S.S. Sharma M.S. roy K.r. Justin Thomas Physics Department Molecular Electronic and Optoelectronic Device Laboratory JNV University Jodhpur Rajasthan 342005 India R&D Center for Science and Engineering Jaipur Engineering College Kukas Jaipur Rajasthan India Chemical Technology Laboratory Department of Chemistry University of Patras GR-26500 Patras Greece Department of Engineering Physics Govt. Engineering College for Women Ajmer Rajasthan India Defence Laboratory Jodhpur Rajasthan India Organic Materials Lab Department of Chemistry Indian Institute of Technology Roorkee Uttrakhand India

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Signal Processing of a 3d Ultrasonic Imaging Sensor That Uses the Spread Spectrum Pulse Compression Technique

Signal Processing of a 3D Ultrasonic Imaging Sensor That Use...

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2012 International Conference on Future Information technology and Management Science & engineering(FITMSE 2012)

作者： Hideo Furuhashi Sahdev Kumar Masatoshi Shimizu Dept. Electrical and Electronics Eng. Aichi Institute of Technology 1247 Yachigusa Yakusa-cho Toyota 470-0392 JAPAN Power Engineering R&D Center Kansai Electric Power Co. Inc. 3-11-20 Nakoji Amagasaki City 661-0974 JAPAN

The present paper describes a 3d ultrasonic imaging sensor that uses the spread spectrum (SS) pulse compression technique. An M sequence on the order of 7 bits has been used as a pseudorandom code for the SS pulse compression. The transmitted signal is phase modulated by the pseudorandom code. An ultrasonic array sensor that has 16 receivers and one transmitter has been used. After correlation and delay-and-sum operation, the 3d range image has been obtained. In order to avoid the influence of the signal that has been directly received by the array sensor (and not reflected by an object), the dead zone of the received signal has been introduced. The influence of the dead zone on the measurement range is discussed. A measurement range of from 1 m to 6 m was obtained by this system.

关键词： Image sensors, Ultrasonic transducer arrays, Array signal processing, Ultrasonic wave modulation, Spread spectrum pulse compression

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dislocation Behavior in ZrC Particles during Elevated Temperature Compressive deformation of a 30 vol.% ZrC_p/W Composite

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Journal of Materials Science & technology 2011年第6期27卷 553-558页

作者： Taiquan Zhang Qingchang Meng Yujin Wang Yu Zhou Guiming Song Institute for Advanced Ceramics Harbin Institute of Technology Harbin 150001 China China National R&D Center for lhngsten Technology Xiamen 361009 China Department of Materials Science and Engineering Delft University of Technology Mekelweg 2 2628CD Delft the Netherlands

A 30 vol.% ZrCp/W composite has been deformed in compression in the temperature range of 1200-1600℃.dislocation nucleation mechanism in ZrC particles is discussed by analyzing the harmonious deformation between tungsten-matrix and ZrC *** activation apparently increases the mobility of screw segments,resulting in the formation of many kinetics jogs and thermodynamics jogs above 1300℃.The formation mechanisms of the dislocation configurations are studied.

关键词： ZrCp/W composite ZrC particle Compressive deformation dislocation microstructure

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