检索结果-内蒙古大学图书馆

IEEE International Conference on Robotics and Biomimetics

作者： Quanjun Song Huanghuan Shen Shuangwei Xie Zhen Gao Ming Liu Yu Yong Yunjian Ge Department of Automation University of Science and Technology Hefei Anhui China Laboratory of Robot Sensing System Institute ofIntelligent Machines Chinese Academy and Sciences Hefei Anhui China Department of Electrical and Computer Systems Engineering Monash University Melbourne VIC Australia

An EMG-driven arm wrestling robot (AWR) is being developed in our laboratories for the purposes of studying neuromuscular control of arm movements. The AWR arm have 2-DOF, integrated with mechanical arm, elbow/wrist force sensors, servo motor, encoder, 3-D MEMS accelerometer, and USB camera, is used to estimate tension developed by individual muscles based on recorded electromyograms (EMGs). The surface electromyographic signal form the upper limb is sampled from a real player in same conditions. By using the method of wavelet packet transformation (WPT) and auto regressive model (AR), the characteristics of EMG signals can be extracted. Artificial neural network is adopted to estimate the elbow joint torque. The effectiveness of the humanoid algorithm using torque control estimated via WRT and neural network is confirmed by experiments. The purpose of this paper is to describe the design objectives, fundamental components and implementation of our real-time, EMG-driven AWR arm.

关键词： Robot sensing systems Elbow Electromyography Artificial neural networks Laboratories Neuromuscular Wrist Force sensors Servomechanisms Servomotors

来源：评论

学校读者我要写书评

暂无评论

An Integrated and Interactive Video Retrieval Framework with Hierarchical Learning Models and Semantic Clustering Strategy

An Integrated and Interactive Video Retrieval Framework with...

引用

IEEE International Conference on Information Reuse and Integration (IRI)

作者： Na Zhao Shu-ching Chen Mei-ling Shyu Stuart H. Rubin Distributed Multimedia Information System Laboratory School of Computing and Information Sciences Florida International University Miami FL USA Department of Electrical and Computer Engineering University of Miami Coral Gables FL USA Space and Naval Warfare Systems Command San Diego CA USA

In this research, we propose an integrated and interactive framework to manage and retrieve large scale video archives. The video data are modeled by a hierarchical learning mechanism called HMMM (hierarchical Markov model mediator) and indexed by an innovative semantic video database clustering strategy. The cumulated user feedbacks are reused to update the affinity relationships of the video objects as well as their initial state probabilities. Correspondingly, both the high level semantics and user perceptions are employed in the video clustering strategy. The clustered video database is capable of providing appealing multimedia experience to the users because the modeled multimedia database system can learn the user's preferences and interests interactively

关键词： Multimedia databases Hidden Markov models Information retrieval Multimedia systems Large scale integration Learning systems Clustering methods Clustering algorithms Feedback Content based retrieval

来源：评论

学校读者我要写书评

暂无评论

EMI model improvement taking LSI package structure into consideration

EMI model improvement taking LSI package structure into cons...

引用

IEEE International Symposium on Electromagnetic Compatibility (EMC)

作者： K. Ichikawa T. Unou T. Tsuda Y. Mabuchi M. Nagata Graduate School of Science and Technology Kobe University Kobe Japan Vehicle Integrated System R & D Dept. DENSO CORPORATION Kariya Japan Department of Computer and Systems Engineering Kobe University Kobe Japan Hitachi Research Laboratory Hitachi Ltd. Ibaraki Japan

来源：评论

学校读者我要写书评

暂无评论

Generalized particle model for problem-solving in multi-agent systems

引用

Jisuanji Xuebao/Chinese Journal of computers 2006年第5期29卷 740-750页

作者： Shuai, Dian-Xun Wang, Xing Feng, Xiang Department of Computer Science and Engineering East China University of Science and Technology Shanghai 200237 China State Key Laboratory of Intelligence Technology and System Tsinghua University Beijing 100084 China

This paper is devoted to a generalized particle model (GPM) approach to distributed problem-solving in MAS, which transforms the optimization problem of resource assignments and task allocations of MAS in complex environment into the kinematics and dynamics in GPM. The complex environment in MAS that the proposed GPM approach may deal with includes: A variety of interactions randomly and concurrently occurring among agents;different personality and autonomy of distinct agents;different life-cycle period, congestion degree and failure rate for distinct entities in MAS. At first, the relation between the GPM and MAS in the context of distributed problem-solving is expatiated. Then the mathematical-physical formalization for GPM and the parallel algorithm GPMA are presented. The basic properties of the GPMA algorithm, including the feasibility, convergency and stability, are discussed. Through a number of simulation experiments and comparisons related to resource assignments and task allocations in MAS in complex environment, the authors demonstrate many advantages of the proposed GPM approach over other coalition methods for MAS problem-solving in terms of the parallelism and the suitability for complex environment.

关键词： Multi agent systems

来源：评论

学校读者我要写书评

暂无评论

Security analysis and improvement of hsu et al.'s threshold proxy signature scheme

引用

International Journal of Network Security 2006年第1期2卷 69-72页

作者： Guo, Lifeng Cheng, Xiangguo Liu, Yang Institute of Systems Science Academy of Mathematics and System Sciences Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences Beijing 100080 China 21 Heng Mui Keng Terrace Singapore State Key Laboratory of Integrated Services Network Xidian University Xi'an 710071 China Software Institute School of Electronic Engineering and Computer Science Peking University 100871 China

In 1999, Sun et al. proposed a new (t, n) threshold proxy signature scheme based on Zhang's threshold proxy signature scheme. But in 2003 Hsu et al. pointed out that Sun's scheme suffered from a drawback and demonstrated an improvement to counter it. In this paper we point out that Hsu's scheme suffers from an insider attack against their scheme. That is, a malicious proxy signer can forge a valid threshold proxy signature on any message. To thwart this attack, some improvements are further proposed.

关键词： Authentication

来源：评论

学校读者我要写书评

暂无评论

The 2004 North Slope Of Alaska Arctic Winter Radiometric Experiment: Overview and Highlights

The 2004 North Slope Of Alaska Arctic Winter Radiometric Exp...

引用

IEEE MicroRad

作者： E.R. Westwater D. Cimini V. Mattioli A.J. Gasiewski M. Klein V. Leuski J.S. Liljegren Cooperative Institute for Research in Environmental Sciences University of Colorado NOAA Earth System Research Laboratory Boulder CO USA Institute for Research in Environmental Sciences University of Colorado Boulder CO USA Dipartimento di Ingegneria Elettronica e dell'Informazione Universitá di Perugia Perugia Italy Department of Electrical and Computer Engineering University of Colorado Boulder CO USA DOE Argonne National Laboratory Argonne IL USA

An intensive operating period (IOP) was conducted at the U. S. Department of Energy's atmospheric radiation measurement (ARM) program's field site near Barrow, Alaska, during March 9 to April 9 2004. During this IOP, radiometers were deployed over a broad frequency range (22.235 to 380 GHz), including several channels near the strong water vapor absorption line at 183.31 GHz. These radiometers were supplemented by 4-times-a-day observations by Vaisala RS90 radiosondes at the ARM Duplex in Barrow, 8 dual-radiosonde launches with "Snow White" chilled mirror radiosondes at the same location, once daily Vaisala RS90 radiosondes launched at the ARM primary field site, and twice-daily synoptic launches by the US National Weather Service. Radiometers deployed included the ground-based scanning radiometer of NOAA (several frequencies from 50 to 380 GHz), the microwave radiometer and the radiometric profiler of ARM (frequencies from 22.235 to 60 GHz), and a global positioning system operated by NOAA. In addition, all of the ARM active cloud sensors were operated. Selected results from this experiment are presented, including observed radiometric sensitivities to precipitable water vapor and liquid water path, radiosonde comparisons between radiosondes types and to MWRP measurements, and a preliminary comparison of forward models with GSR data

关键词： Arctic Radiometers Microwave radiometry Frequency Near-field radiation pattern Atmospheric measurements Energy measurement Electromagnetic wave absorption Snow Mirrors

来源：评论

学校读者我要写书评

暂无评论

Phase contrast using a differentiated absolute contrast method

引用

Quantitative InfraRed Thermography Journal 2006年第2期3卷 219-230页

作者： Susa, Mirela Benítez, Hernán D. Ibarra-Castanedo, Clemente Loaiza, Humberto Bendada, Hakim Maldague, Xavier Computer Vision ad System Laboratory Department of Electrical and Computer Engineering Université Laval Québec QC G1K7P4 Canada Universidad del Valle Escuela de Ingeniería Eléctrica Grupo de Investigación en Percepción y Sistemas Inteligentes Cali Calle 13 Cra 100 Colombia

A depth retrieval technique based on phase contrast calculations by pulsed phase thermography (PPT) has been previously reported. The phase contrast requires an appropriate selection of the sound area. This is rarely an easy task primarily because a nondefective zone is not always a priori known and even when it is, some variability is typically observed in the results due to changes in the sound phase. This article proposes implementing the differentiated absolute contrast (DAC) method to eliminate the need of defining a sound area. The proposed PPT-DAC approach, allows computation of the phase contrast by subtracting the ideal phase value of a pixel from its measured phase. © 2006 Taylor & Francis Ltd.

关键词： Depth inversion Differentiated absolute contrast NDE Pulsed phase thermography

来源：评论

学校读者我要写书评

暂无评论

Theoretical analysis of current density distribution in superconducting plate of flat type superconducting fault current limiter

引用

Journal of Physics: Conference Series 2006年第1期43卷 933-936页

作者： Shimizu, H. Sannomiya, K. Watanabe, N. Yokomizu, Y. Matsumura, T. Shibuya, M. Ichikawa, M. Kado, H. Department of Electrical System Engineering Polytechnic University Sagamihara Kanagawa 229-1196 4-1-1 Hashimotodai Japan Department of Electrical Engineering and Computer Science Nagoya University Chikusa-ku Nagoya 464-8603 Furo-cho Japan Electric Power Engineering Research Laboratory Central Research Institute of Electrical Power Industry Yokosuka Kanagawa 240-0196 2-6-1 Nagasaka Japan

We have proposed an inductive (magnetic shielding) type of superconducting fault current limiter which consists of a high Tc superconducting plate in doughnut shape and spiral coil as the primary winding. In this pape...

We have proposed an inductive (magnetic shielding) type of superconducting fault current limiter which consists of a high T_c superconducting plate in doughnut shape and spiral coil as the primary winding. In this paper, the current density distribution in the superconducting plate was theoretically investigated to understand the fundamental performance of this type of current limiter. For the analysis, we developed the calculation method for the current density. The current density is distributed almost uniformly in the superconducting plate. The impedance of the current limiter changes every moment not only in current limiting operation but also normal operation. That is because the resistance in the superconducting plate and magnetic coupling condition in the current limiter also change with time. Relatively large impedance rapidly appears in the current limiter when the current density in all the area of the superconducting plate attain to the critical current density. © 2006 IOP Publishing Ltd.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A novel approach of density estimation for vector quantization

引用

WSEAS Transactions on computers 2005年第9期4卷 1179-1186页

作者： Nongnuch, Akkaphon Surarerks, Athasit Engineering Laboratory in Theoretical Enumerable System Department of Computer Engineering Chulalongkorn University 254 Phyathai Road Patumwan Bangkok Thailand

Vector quantization is widely used in various applications. Most researches focus on creating a codebook with respect to spatial distance. The quantization performance is usually measured by distortion. In our work, we introduce a novel approach for vector quantization that is a density estimation technique. Codebooks obtained from our algorithm can express the density distribution of the original vectors. A flexible version, strong and weak algorithm, is also proposed in this paper. Experimental results show that the distortion can be reduced using a flexible version of our algorithm.

关键词： Image compression

来源：评论

学校读者我要写书评

暂无评论

A Power-Aware Branch Predictor by Accessing the BTB Selectively

引用

Journal of computer Science & Technology 2005年第5期20卷 607-614页

作者： Cheol Hong Kim Sung Woo Chung Chu Shik Jhon Mobile System Laboratory Department of Electrical Engineering and Computer Science Seoul National University Seoul 151-742 Korea Department of Computer Science University of Virginia Charlottesville Virginia 22904 U.S.A.

Microarchitects should consider power consumption, together with accuracy, when designing a branch predictor, especially in embedded processors. This paper proposes a power-aware branch predictor, which is based on the gshare predictor, by accessing the BTB （Branch Target Buffer） selectively. To enable the selective access to the BTB, the PHT （Pattern History Table） in the proposed branch predictor is accessed one cycle earlier than the traditional PHT if the program is executed sequentially without branch instructions. As a side effect, two predictions from the PHT are obtained through one access to the PHT, resulting in more power savings. In the proposed branch predictor, if the previous instruction was not a branch and the prediction from the PHT is untaken, the BTB is not accessed to reduce power consumption. If the previous instruction was a branch, the BTB is always accessed, regardless of the prediction from the PHT, to prevent the additional delay/accuracy decrease. The proposed branch predictor reduces the power consumption with little hardware overhead, not incurring additional delay and never harming prediction accuracy. The simulation results show that the proposed branch predictor reduces the power consumption by 29-47%.

关键词： branch predictor BTB embedded processor low power design PHT

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：