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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Weiqiang Sun Xuejuan Xie Mingzhi Zhao Yaohui Jin Weisheng Hu Wei Guo Da Feng Zhengyu Wang State Key Laboratory of Advanced Optical Communication System and Networks Shanghai JiaoTong University Shanghai China

We report G-TEP which includes a GMPLS tester of highly dynamic GMPLS networks, and an emulated GMPLS network with up to 200 nodes targeted at future nation-wide deployment of ASON in China

关键词： Emulation Resource management Telecommunication traffic Graphical user interfaces system testing Large-scale systems Signal processing Sun Optical fiber communication Electronic mail

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Research on the Surface EMG Signal for Human Body Motion Recognizing Based on Arm Wrestling robot

Research on the Surface EMG Signal for Human Body Motion Rec...

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International Conference on Information and Automation (ICIA)

作者： Zhen Gao Jianhe Lei Quanjun Song Yong Yu Yunjian Ge Department of Automation University of Science and Technology Hefei Anhui China State Key laboratory of Robot Sensing System Chinese Academy and Sciences Hefei Anhui China

In this paper, the surface electromyographic (EMG) signals is acquired from the upper limb when the experimenter competes with the arm wrestling robot (AWR) which is integrated with mechanical arm, elbow/wrist force sensors, servo motor, encoder, 3D MEMS accelerometer, and USB camera. The arm wrestling robot (AWR) is intended to play arm wrestling game with human on a table with pegs for entertainment and human upper limbs muscle modeling. As the EMG signal is a measurement of the anatomical and physiological characteristic of the given muscle, the macroscopical movement patterns of the human body can be classified and recognized. By using the method of wavelet packet transformation (WPT), the high-frequency noises can be eliminated effectively and the characteristics of EMG signals can be extracted. Auto-regressive (AR) model is adopted to effectively simulate the stochastic and non-stationary time sequences using a series of AR coefficients with a typical order. Artificial neural network (ANN) is utilized to distinguish the different force levels and game grades in the scenario of arm-wrestling. To advance the training speed and accurate rate of the motion pattern classification, back-propagation (BP) neural network based on adaptive learning rate algorithm (ALR) is introduced. The advantage of ALR algorithm compared with standard BP algorithm is confirmed by experiments

关键词： Electromyography Humans robot sensing systems Biological system modeling Artificial neural networks Muscles Elbow Wrist Force sensors Servomechanisms

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Querying about the Near Future Positions of Moving Objects

Querying about the Near Future Positions of Moving Objects

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International Multi-Symposiums on Computer and Computational Sciences (IMSCCS)

作者： Jing Guo Wei Guo Dongru Zhou School of Computer Science Wuhan University of China Wuhan China The State Key Laboratory of Advanced Optical Communication System and Network Shanghai JiaoTong University Shanghai China

Moving objects continuously generate large amounts of spatio-temporal data. Maintaining and querying the location information of moving objects are a crucial problem. This paper focuses on the query problems of indexing structure for moving objects. The main focus of query processing is retrieval of approximate future movement information about moving objects that may be unavailable. First, a VPMR-tree is proposed for indexing the moving objects in road networks. Second, exponential smoothing method for predicting the result of queries that refer to the future is implemented. The experimental results have shown that VPMR-tree achieves a better performance for query evaluation than TPR-tree

关键词： Indexing Roads Spatial databases Computer science Query processing Global Positioning system Optical fiber communication Information retrieval Smoothing methods Wireless communication

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Indexing of Constrained Moving Objects for Current and Near Future Positions in GIS

Indexing of Constrained Moving Objects for Current and Near ...

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International Multi-Symposiums on Computer and Computational Sciences (IMSCCS)

In geographic information system (GIS), fast and efficiently indexing moving objects are a crucial issue in several application domains, such as LBS, intelligence transportation and digital battle. In this paper, a new index structure, PQR-tree, is proposed to fast update and efficiently index the present or near future positions of constrained moving objects based on the characters of moving objects. PQR-tree is an integrated tree structure which combined PMR quadtree, quadtree and R*-tree together. Firstly, QR-tree which combined quadtree and R*-tree is used to carry out rough level partition for index space based on range region. Next, an R*-tree is used to index quasi-static objects for each subspace. Then, using a splitting rule of PMR quadtree to carry further level partition for index space based on road networks and all fast moving objects are related to the road networks. The experimental results show that PQR-tree achieves better performance for index updating and query evaluation than TPR-tree

关键词： Indexing Geographic Information systems Computer science Roads Optical fiber communication Application software Intelligent transportation systems Intelligent networks Tree data structures Query processing

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Research on a Throwing Multidimensional Force Sensing system for advanced Training of Shot-Put Athletes

Research on a Throwing Multidimensional Force Sensing System...

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International Conference on Information and Automation (ICIA)

作者： Zhen Gao Quanjun Song Ming Liu Jianhe Lei Yong Yu Yunjian Ge State Key laboratory of Robot Sensing System Institute of Intelligent Machines Chinese Academy and Sciences Hefei Anhui China Department of Electrical and Computer Systems Engineering Monash University Melbourne VIC Australia

In this paper, we develop a novel digital-shot system for sensing the throwing force information of shot-put athletes in real time. The digital-shot has been designed and manufactured with the same external dimensions and weight as the normal shot for open females. The three axes integrated accelerometer, as a crucial device in the force sensing system, can acquire the kinetics data along three orthogonal directions with reasonably high accuracy. By using the method of wavelet transformation, the characteristics of acceleration signals during the shot-put period can be extracted. Artificial neural network is adopted to recognise the movement pattern in different phases of shot throwing. For supplying more effective training instruction, with the help of six axes ground reaction force measuring apparatus, high-speed photography and surface electromyographic signal remote measuring device etc, an integrated platform of shot-put athlete biomechanical information acquisition is constructed. Based on the fusion of multi-targets and multi-parameters information, the shot-put athletes coaching system is proposed, which not only can supply constructive guidance for athletes to improve their skills, but also provide a new research platform of motion human modeling.

关键词： Multidimensional systems Force measurement Real time systems Manufacturing Accelerometers Kinetic theory Acceleration Data mining Artificial neural networks Pattern recognition

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On topology-independent IP group aggregation in multicast capable optical networks

On topology-independent IP group aggregation in multicast ca...

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IEEE Conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： Yi Zhu Yaohui Jin Weiqiang Sun Wei Guo Weisheng Hu State Key Laboratory of Advanced Optical Communication System and Network Shanghai Jiaotong University Shanghai China

To support large-scale IP-TV signal delivering, a new multicast-IP over light-tree network model was proposed in W. Sun et al. In this paper, we study the problem of topology-independent IP group aggregation in the multicast capable optical network. We first use a tri-partite graph to describe the problem, and then formulate the problem by a mixed integer linear programming (MILP) model. Finally, we propose a pre-estimation for the number of light-trees to reduce the searching space, which significantly saves solving time of MILP

关键词： Intelligent networks Optical fiber networks Telecommunication traffic Multicast algorithms Digital TV Bit rate Bandwidth Traffic control HDTV Watches

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Measuring vibration by using fiber Bragg grating and demodulating it by blazed grating

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Chinese Optics Letters 2004年第7期2卷 393-395页

作者：郭晓金殷宗敏宋宁 The State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems Shanghai Jiaotong University Shanghai 200030 The State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems Shanghai Jiaotong University Shanghai 200030 method of measuring vibration by using fiber Bragg grating (FBG) and demodulating the spectrum by blazed grating is introduced. The sensor system is made of a simple supported beam with a FBG adhered to its upper surface. A blazed grating is used to demodulate the changing spectrum that is got from the sensor system and a line charge-coupled device (CCD) is used to accept the diffraction spectrum. Through analyzing the number of the CCD's pixels we can get the amplitude of vibration and the change of the temperature. The experimental results show that the vibration amplitude of the exciter matches the detected signal under the stable frequency. The temperature shift and vibration signal are also successfully separated.

A method of measuring vibration by using fiber Bragg grating (FBG) and demodulating the spectrum by blazed grating is introduced. The sensor system is made of a simple supported beam with a FBG adhered to its upper surface. A blazed grating is used to demodulate the changing spectrum that is got from the sensor system, and a line charge-coupled device (CCD) is used to accept the diffraction spectrum. Through analyzing the number of the CCD's pixels, we can get the amplitude of vibration and the change of the temperature. The experimental results show that the vibration amplitude of the exciter matches the detected signal under the stable frequency. The temperature shift and vibration signal are also successfully separated.

关键词： Charge coupled devices Fiber Bragg gratings Fiber optic sensors Temperature measurement

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Optimal ramped-gate soft programming of over-erased flash EEPROM cells at given current

Optimal ramped-gate soft programming of over-erased flash EE...

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International Conference on Solid-state and Integrated Circuit Technology

作者： Wu-yun Quan Chang-Ki Baek D.M. Kim Ruan Gang Yiping Huang ASIC & System State-Key Research Laboratory Department of Microelectronics Fudan University Shanghai China School of Electrical Engineering and Computer Science and ISRC Seoul National University Seoul South Korea Korea Institute of Advanced Study Seoul South Korea

ISBN: (纸本)078038511X

Presented herein is an efficient simulation technique enabling systematic investigation of the soft programming over-erased flash EEPROM cells. The simulation provides a method by which to find the optimal soft programming technique for given current. The method requires only the cell performance data and allows investigation of the soft programming under various bias conditions. In principle, the methodology can also be used to investigate the programming and erase operations.

关键词： EPROM Threshold voltage Computational modeling Microelectronics Computer science Boosting Voltage control Charge pumps Testing Performance evaluation

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Frequency domain wavelet method with GMRES for large-scale linear circuit simulation

Frequency domain wavelet method with GMRES for large-scale l...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： Jian Wang Xuan Zeng Wei Cai C. Chiang Jiarong Tong Dian Zhou ASIC & System State Key Laboratory Microelectronics Department Fudan University Shanghai China Mathematics Department University of North Carolina Charlotte Charlotte NC USA Advanced Technology Group Synopsys Inc. Mountain View CA USA Electrical Engineering Department University of Texas Dallas Richardson TX USA

In this paper, a frequency domain fast wavelet collocation method with GMRES (FFWCM-G) is proposed for the simulation of high-speed large-scale linear VLSI circuits. Taking advantages of wavelet expansion and adaptive scheme, the number of frequency points for calculating frequency response is minimized. Moreover, due to the efficiency of GMRES as the internal iterative solver, the proposed method can achieve nearly linear time complexity, which undoubtedly would be more promising to simulate large-scale integrated circuits.

关键词： Frequency domain analysis Wavelet domain Large-scale systems Linear circuits Circuit simulation Very large scale integration Frequency response Iterative methods Integrated circuit modeling Large scale integration

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Topological dependence of mechanical responses of solidification microstructures in aluminum brazed joints

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中国有色金属学会会刊：英文版 2003年第6期13卷 1296-1300页

作者：高峰钱乙余 D.P.Sekulic 马鑫 F.Yoshida State Key Laboratory of Advanced Production Technology Center for Robotics and Manufacturing Systems Department of Mechanical System Engineering

The main objective is to provide an evidence of spatial dependence of mechanical responses of a heterogeneous aluminum brazed joint re-solidified clad, and to confirm a sufficient sensitivity of a nano-indentation—load curve method for identifying the dependence. Topological features of a network of solidification microstructures(α phase and eutectic), formed during quench in a brazing process of aluminum alloy, influence significantly dynamic mechanical responses of resulting heterogeneous material. Nano/micro indentation depth vs load characteristics of differing phases suggest a spatially sensitive mechanical response of a re-solidified fillet in the joint zone. Hence, a spatial distribution, pattern formations and other morphological characteristics of microstructures have a direct impact on an ultimate joint integrity. Topology-induced variations of indentation—load curves was presented. A hypothesis involving microstructures’ spatial distribution vs mechanical response was formulated.

关键词：铝铜焊显微结构凝固拓扑相关机械响应焊接铝合金

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