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IEEE International Conference on Industrial Technology (ICIT)

作者： Jeong-il Kang Jonghee Han Sang-Kyoo Han R&D Office Visual Display Samsung Electronics Co. LTD Suwon Republic of Korea Power Electronics System Laboratory POESLA Kookmin University Seoul Republic of Korea

In order to suppress the switch voltage spike in the tapped-inductor boost (TIB) converter, a passive lossless snubber with minimum voltage stress is proposed. It consists of two capacitors and three diodes and takes advantage of the leakage inductance of the tapped-inductor. Moreover, it can readily be incorporated into an existing system since it does not modify the original TIB topology. The TIB converter employing the proposed snubber features zero current soft-switching of the switching devices, significantly relieved diode reverse-recoveries, and higher step-up ratio than the original TIB converter without a snubber. The proposed circuit is analyzed in detail, and some experimental results are also presented.

关键词： Switches Clamps Snubbers Topology Light emitting diodes Inductance Capacitors

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High-efficiency boundary conduction mode tapped-inductor boost LEd driver

High-efficiency boundary conduction mode tapped-inductor boo...

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IEEE International Conference on Industrial Technology (ICIT)

A high-efficiency boundary conduction mode (BCM) tapped-inductor boost converter for constant output current applications is proposed. Besides the well-known advantages from the BCM operation such as the significantly relieved diode reverse-recovery and switching loss, the proposed converter shows a switching frequency which is insensitive to the output voltage variations. This makes the proposed converter very attractive in small form factor mobile LEd driver applications. The circuit is analyzed in detail, and a design guideline is presented. Experimental results from an LEd backlight driver prototype for a 14" notebook computer are also presented.

关键词： Light emitting diodes Switches Switching frequency Topology Stress Magnetic switching Market research

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EMC issues on wireless power transfer

EMC issues on wireless power transfer

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International Symposium on Electromagnetic Compatibility, Tokyo (EMCTokyo)

作者： Shuichi Obayashi Hitoshi Tsukahara Wireless System Laboratory Corporate R&D Center Toshiba Corporation Kawasaki Japan Electronics Engineering Development Division Nissan Motor Co. Ltd. Atsugi Japan

Wireless power transfer technology is expected to be one of key technologies to offer easy and safe power supply as well as battery charging and thus to contribute to smart community through various kinds of products, such as portable digital devices and electrical vehicles. This paper mainly focuses on EMC issues on wireless power transfer, including emission which may cause the interference to other radio equipment, immunity, and human body protection. The general overview on the EMC and relevant issues are shown. The current and ongoing effort of technological research, rule making, and international and regional standardization on EMC aspects of wireless power transfer are also described.

关键词： Wireless communication Guidelines Electromagnetic compatibility IEC standards Immune system Communication system security

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Next Generation of Embedded system on Cloud Computing

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Procedia computer Science 2014年 35卷 1605-1614页

作者： Tetsuo Furuichi Kunihiro Yamada SOFTWARE R&D LABORATORY MegaChips Corporation 1-1-1 Miyahara Yodogawaku Osaka Japan 532-0003 Graduate School of System Design Tokyo Metropolitan University 1-1 Minami-Osawa Hachioji-shi Tokyo Japan 192-0397

We examined the advantages of embedded systems on cloud computing. Specifically, we left only minimum functions (controller and communication) in the end device while implementing remaining functions (other controller / data processing / storage) into the server on cloud computing. As an experiment, we developed a system capable of recognizing car number plate. Leveraging cloud computing allows us to obtain such benefits as smooth performance, reduced development time, simpler embedded system and potential of functionality and performance that were thought impossible. Through developing the number plate recognition system, we are convinced of realizing such potential.

关键词： cloud computing embedded system electronic device system product user interface

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reaping Context-aware Services from Living data

Reaping Context-aware Services from Living Data

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4th International Conference on Information Science and Applications (ICISA)

作者： Park, Jeongkyu Lee, Keung Hae R&D Center LIG System South Korea Department of Computer Engineering Korea Aerospace University South Korea

ISBN: (纸本)9781479906048;9781479906024

With the number of applications multiplying, it is often felt challenging to embrace the right service. Context-aware computing can mitigate this problem by shifting the burden of decision from the user to the computing system. This new technology is expected to bring us a new life style, which is automated and more convenient. despite much progress made in this area, context-aware services are still handful. This paper discusses a method for creating useful context-aware services based on the user's daily living data. A model of creating personalized context-aware services is discussed. We argue that our method can discover useful context-aware services.

关键词： Context-awareness Personalized Context-aware Service Context-aware Computing Smart Home

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A privacy protection model for location-based social networking services

A privacy protection model for location-based social network...

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2014 International Conference on Engineering Technology And Applications(ICETA2014)

作者： rong Tan Wen Si Jian Wang College of Information and Computer Science Shanghai Business School Cyber Physical System R&D Center The Third Research Institute of Ministry of Public Security School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University

Since the location-based social networking services emerged,the location privacy issue has gained widespread concerns from consumers and *** the location history plays an important role in knowledge discovery,many people worry that their privacy will be disclosed *** this paper,we introduce a spatial-temporal cloaking model which follows the k-anonymity principle to protect the location *** corresponding algorithm which can find a minimum cloaking 3d box covering the actual location and its temporal information is proposed as ***,the algorithm is able to prevent the modeled records against the continuous attacks which infer the actual location by computing the overlapping spatial *** experimental results show that the proposed algorithm has a high efficiency.

关键词： privacy model location privacy protection privacy protection mobile computing location-based social networking services location-based services

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dynamic optimal operation scheduling of microgrid using binary gravitational search algorithm

Dynamic optimal operation scheduling of microgrid using bina...

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International Conference on Power system Technology (POWErCON)

作者： Peng Li Zeyuan Zhou Xiaopeng Lin Xavier Yang Xingyan Niu State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Baoding Hebei China Electricité de France—China Division R&D Department Henderson Center Beijing China

ISBN: (纸本)9781479950331

With the emergence of energy crisis and environmental pollution, the concept of microgrid (MG) is receiving much attention today. The optimal operation scheduling is an important research topic in the field of MG. In this paper, binary gravitational search algorithm (BGSA) is proposed to optimize the operation scheduling of MG dynamically, which includes dynamic optimal unit commitment and power dispatch. At first, according to the characteristics of MG operation and its internal relations between different time periods, a mathematical optimization model is established to achieve the least operation and environmental cost, while meeting the load demand and system operating requirements. In order to solve this complex optimal problem, BGSA is proposed to optimize the unit commitment and power dispatch of MG. The simulation results show that the proposed method has efficient performance in optimizing operation scheduling of MG dynamically, and thus can improve the technical level of MG operation for more economic and environmental benefits.

关键词： dynamic scheduling Heuristic algorithms Power system dynamics Optimization Job shop scheduling Power generation

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Activity awareness based on simple sensors

Activity awareness based on simple sensors

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International Conference on Awareness Science and Technology (iCAST)

作者： Chia-Ming Tsai Qiangfu Zhao rung-Ching Chen Masato Taya Computer and Information Systems The University of Aizu Fukushima Japan Department of Information Management Chaoyang University of Technology Taichung Taiwan Web Data Computing Laboratory KDDI R&D Laboratories Inc. Saitama Japan

The basic concept of smart environment is to be aware of the context information related to environmental and human behavioral changes, and to provide appropriate services accordingly. To obtain the context information, people often use video cameras, microphones, and other devices. These devices can obtain a wealth of environmental information, but could easily lead to privacy issues. Large environmental information also need more computing resources to process the information. In this paper, we study human behavior identification based on simple sensors. Using fuzzy logic we analyze the sensor data and try to identify four different activities. Experimental results show that the proposed method can correctly identify 83.7 % of these four activities. results given here will be useful for designing smart homes, smart office, and so on.

关键词： Intelligent sensors Fuzzy logic Privacy Temperature sensors Cameras Smart homes

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r&d Activities for 5G in IEICE Technical Committee on radio Communication systems

R&D Activities for 5G in IEICE Technical Committee on Radio ...

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Asia-Pacific Conference on Communications

作者： Hidekazu Murata Akihiro Okazaki Jun Mashino Eiji Okamoto Satoshi Suyama Tetsuya Yamamoto Manabu Mikami Takamichi Inoue Makoto Taromaru Graduate School of Informatics Kyoto University Sakyo-ku Kyoto 606-8501 Information Technology R&D Center Mitsubishi Electric Corporation Kamakura Kanagawa 247-8501 NTT Network Innovation Laboratories NTT Corporation Yokosuka Kanagawa 239-0847 Graduate School of Engineering Nagoya Institute of Technology Showa-ku Nagoya 466-8555 5G Laboratory NTT DOCOMO INC. Yokosuka Kanagawa 239-8536 Technology Development Laboratory Panasonic Corporation Tsuzuki-ku Yokohama 224-8539 R&D Division Softbank Corp. Koto-ku Tokyo 135-0064 Could System Research Laboratories NEC Corporation Nakahara-ku Kawasaki 211-8666 Faculty of Engineering Fukuoka University Johnan-ku Fukuoka 814-0180

ISBN: (纸本)9781467366533

As the demand for higher transmission rates and spectral efficiency is steadily increasing, the research and development of novel mobile communication systems has gained momentum. This paper focuses on providing a comprehensive survey of research and development activities on fifth generation mobile communication systems reported in IEICE technical committee on radio communication systems. We try to survey a vast area of wireless communication systems and the developments that led to future 5G systems.

关键词： IEICE Technical Committee demand for higher transmission rates comprehensive survey of research

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Practice of PBL in the reading Teaching Strategies

Practice of PBL in the Reading Teaching Strategies

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2014 International Conference on Information Technology and Career Education

作者： Yingting Wang Jian Wang Hao Sheng Nanjing Yuying Foreign Language School Cyber Physical System R&D Center The Third Research Institute of Ministry of Public Security School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University School of Computer Science and Engineering Beihang University

Combined PBL with some advanced foreign reading teaching strategies,we choose the most suitable way to give lessons and bring up students ability to think of *** on teaching experience for several years,we propose some teaching strategies in English reading teaching to help students improve the efficiency and accuracy of reading with the help of *** practice,students'innovation and cooperation are strengthened and the width and depth of their questions are improved.

关键词： PBL problem-based learning reading teaching strategies

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