检索结果-内蒙古大学图书馆

作者： Llatser, Ignacio Kremers, Christian Cabellos-Aparicio, Albert Jornet, Josep Miquel Alarcón, Eduard Chigrin, Dmitry N. Universitat Politècnica de Catalunya Jordi Girona 1-3 Campus Nord D6-008 08034 Barcelona Spain Institute of High-Frequency and Communication Technology Faculty of Electrical Information and Media Engineering University of Wuppertal Rainer-Gruenter-Str. 21 D-42119 Wuppertal Germany Broadband Wireless Networking Laboratory School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332 United States

The scattering of terahertz radiation on a graphene-based nano-patch antenna is numerically analyzed. The extinction cross section of the nano-antenna supported by silicon and silicon dioxide substrates of different thickness are calculated. Scattering resonances in the terahertz band are identified as Fabry-Perot resonances of surface plasmon polaritons supported by the graphene film. A strong tunability of the antenna resonances via electrostatic bias is numerically demonstrated, opening perspectives to design tunable graphene-based nano-antennas. These antennas are envisaged to enable wireless communications at the nanoscale. © 2012 Elsevier B.V. All rights reserved.

关键词： Graphene

来源：评论

学校读者我要写书评

暂无评论

WHO'S WHO IN A SPORTS VIDEO? AN INDIVIDUAL LEVEL SPORTS VIDEO INDEXING SYSTEM

WHO'S WHO IN A SPORTS VIDEO? AN INDIVIDUAL LEVEL SPORTS VIDE...

引用

IEEE International Conference on Multimedia and Exposition

作者： Shih-Wei Sun Wen-Huang Cheng Yao-Ling Hung Ivy Fan Chris Liu Jacqueline Hung Chia-Kai Lin Hong-Yuan Mark Liao Department of New Media Art Taipei National University of the Arts Research Center for Information Technology Innovation Academia Sinica Institute of Information Science Academia Sinica Department of Computer Science University of Illinois-Urbana Champaign Electrical Engineering and Computer Science Massachusetts Institute of Technology Electronic Engineering National Taiwan University of Science and Technology

ISBN: (纸本)9781467316590

Sports video analysis has attracted great attention in recent years. In the past decade, numerous sports video indexing approaches have been proposed at different semantic levels. In this paper, an individual level sports video indexing (ILSVI) scheme is proposed. The individual level refers to the indexing of a sports video on a player basis, i.e. to recognize each player in a multi-player game. Since the jersey number is always "worn" by a player as the player's identity in a game, it is feasible to recognize jersey numbers for individual level indexing in sports videos. To solve the jersey number recognition problem, a principal-axis based contour descriptor is proposed. Compared to the state-of-the-art approaches, the proposed descriptor can achieve higher recognition rate and only consume much less computation power. In addition, we developed an interactive system to realize the individual level sports video indexing (ILSVI). This interactive system includes a player detection and a jersey number detection sub-systems. The interactive system can help complete the individual level sports video indexing task. We shall use basketball game videos as the basis to develop real-world systems.

关键词： Sports video analysis Individual level indexing Jersey number recognition

来源：评论

学校读者我要写书评

暂无评论

Adaptive control for a cable driven robot arm

Adaptive control for a cable driven robot arm

引用

2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012

作者： Ma, Jianjun Li, Yanan Ge, Shuzhi Sam Social Robotics Laboratory Interactive Digital Media Institute National University of Singapore Singapore 119077 Singapore Department of Automatic Control College of Mechatronics and Automation National University of Defense Technology Changsha 410073 China NUS Graduate School for Integrative Sciences and Engineering National University of Singapore Singapore 119613 Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Singapore Robotics Institute School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 610054 China

ISBN: (纸本)9781467312776

The cable-driven mechanism is usually used in robotic systems for the efficient transmission of forces or torques from actuators to the end-effector. However, the control design is challenging for these systems due to the cable compliance and transmission elasticity. In this paper, adaptive control in a cascaded structure is designed for the trajectory tracking of a cable driven robot arm. The desired control input is obtained by developing an adaptation scheme, which does not require the computation of the regressor matrix. Proportional-derivative (PD) control is designed to specify the actual control input such that the trajectory tracking is achieved. Simulation results are provided to show the effectiveness of the proposed method. © 2012 IEEE.

关键词： Cables

来源：评论

学校读者我要写书评

暂无评论

Transactional Dependency for Failure Recovery in Web Services Composition System

引用

电子学报(英文版) 2012年第2期21卷 241-248页

作者： MEI Xiaoyong LI Shixian HUANG Changqin ZHENG Xiaolin School of Information Science and Technology Sun Yat-sen University Guangzhou 510275 China School of Computer Science and Technology Hunan University of Arts and Science Changde 415000 China Department of Electrical Engineering and Computer Sience University of California Irvine CA 92697 USA College of Computer Science and Technology Zhejiang University Hangzhou 310027 China

With the advanced Internet technology, business applications across multiple enterprises based on Composition web services (CWS) paradigm are widely used. Since business processes among enterprises become complex, loosely coupled, long running and unpredictable, tasks collaborate in a peer-to-peer fashion without central control, in which task dependency is inevitable. And when a system crash occurs, some tasks of the transaction flow may be committed while others unscheduled, in this situa- tion, it is important to accurately specify the dependency between tasks in Transactional composition service (TCS), contemporary technologies usually statically specify de- pendency point and avoid implicit interaction in parallel aggregation. In this paper, we propose a task dependency analysis method based on transaction execution logs. We present the formal description of atomic Web service (WS) and discuss properties of the atomic WS such as pivot, compensability, retriability and vitalness, then analyze ex- ecution logs of transactions, specify data flow dependency and behavior dependency between tasks in TCS, behavior dependency and properties of aggregation patterns. The TCS based application of Trip reservation process (TRP) shows that it is feasible to ensure consistent execution of reliable TCS.

关键词： Web服务组合系统故障恢复依赖性相关性分析方法交易流程事务应用程序

来源：评论

学校读者我要写书评

暂无评论

MatchMaker: A friend recommendation system through TV character matching

MatchMaker: A friend recommendation system through TV charac...

引用

Consumer Communications and Networking Conference, CCNC IEEE

作者： Li Bian Henry Holtzman Tuan Huynh Marie-Jose Montpetit Media Laboratory Massachusetts Institute of Technology Cambridge MA USA Electrical Engineering and Computer Science Department Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA USA

MatchMaker is an automated collaborative filtering system that recommends friends to people on Facebook by analyzing and matching people's online profile with the profiles of TV characters. The goal of MatchMaker is to produce friend recommendations with rich contextual information through collaborative filtering in the existing social network. Using relationships in TV programs as a parallel comparison matrix, MatchMaker projects these relationships into reality to help people find friends whose personality and characteristics have been voted to suit them well by their social network. MatchMaker also encourages more TV content viewing by using the social network context and connections to provoke people's curiosity of TV characters whom they have been matched with in their social network.

关键词： Facebook TV Databases Layout Filtering Androids

来源：评论

学校读者我要写书评

暂无评论

On intrinsically live structure of a class of generalized petri nets modeling FMS

On intrinsically live structure of a class of generalized pe...

引用

11th International Workshop on Discrete Event Systems, WODES 2012

作者： Liu, Ding Barkaoui, Kamel Zhou, MengChu School of Electro-Mechanical Engineering Xidian University No. 2 South Taibai Road Xi'an 710071 China Laboratoire CEDRIC Conservatoire National des Arts et Métiers 192 rue Saint Martin Paris Cedex 03 France Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102 United States

ISBN: (纸本)9783902823281

The deadlock control and liveness-enforcement are mostly implemented based on siphons in most existing work using structural theory. Our previous work has revealed a kind of intrinsically live structures in a class of generalized Petri nets called systems of simple sequential processes with weighted resources allocation (WS3PR). The liveness-enforcement is achieved by analyzing the structure including weight information and reconfiguring the initial marking of resource places without considering the initial token counts in idle process places. This work extends it to a more general class than WS 3PR. Instead of siphons, a new concept of structural objects is defined to carry weight information and reflect the circular waits of resources. The numerical relationship between initial markings of resource places and weights of arcs is investigated to yield an intrinsically live structure-based liveness-enforcing method that requires no external monitors. The work provides an insight into structures of generalized Petri nets and a new revenue to achieve the desired deadlock control. Several examples are used to illustrate the proposed method.

关键词： Petri nets

来源：评论

学校读者我要写书评

暂无评论

Impedance control of a rehabilitation robot for interactive training

引用

4th International Conference on Social Robotics, ICSR 2012

作者： He, Wei Ge, Shuzhi Sam Li, Yanan Chew, Effie Ng, Yee Sien Robotics Institute School of Automation Engineering University of Electronic Science and Technology of China Chengdu 611731 China Robotics Institute School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Singapore Social Robotics Lab. Interactive Digital Media Institute National University of Singapore Singapore 119613 Singapore Division of Neurology National University Hospital Singapore 119074 Singapore Department of Rehabilitation Medicine Singapore General Hospital Singapore 169608 Singapore

ISBN: (纸本)9783642341021

In this paper, neural networks based impedance control is developed for a wearable rehabilitation robot in interactions with humans and the environments. The dynamics of the robot are represented by an n-link rigid robotic manipulator. To deal with the system uncertainties and improve the robustness of the system, the adaptive neural networks are used to approximate the unknown model of the constrained robot. With the proposed control, uniform ultimate boundedness of the closed loop system is achieved based on the Lyapunov method. The states of the system converge to a small neighborhood of zero by properly choosing control gains. Extensive simulations are conducted to verify the proposed control. © 2012 Springer-Verlag.

关键词： Lyapunov methods

来源：评论

学校读者我要写书评

暂无评论

Anisotropic diffusion filter without conductivity parameters

Anisotropic diffusion filter without conductivity parameters

引用

International Conference on System Theory, Control, and Computing (ICSTCC)

作者： Recep Demirci Ugur Guvenc Ufuk Tanyeri Computer Engineering Department Technology Faculty Gazi University Ankara Turkey Electrical-Electronics Engineering Department Technology Faculty Duzce University Duzce Turkey Industrial Technology Education Department Industrial Arts Education Faculty Gazi University Ankara Turkey

Two novel automatic anisotropic diffusion filters without conduction parameters were proposed in this paper. In the proposed first method, initially, the gradient of the noisy image to be filtered was calculated by Sobel operator and then the center of gravity of gradient image was used as diffusivity parameter, K and edge threshold. It was observed that the center of gravity of gradient image changed with noise. In the second approach, the complement of gradient image was directly employed as heat conductivity parameter in image filter. Consequently, the user dependency was avoided. The proposed image filter was tested with well-known test images.

关键词： Image edge detection Anisotropic magnetoresistance Logistics Maximum likelihood detection Nonlinear filters Conductivity Materials

来源：评论

学校读者我要写书评

暂无评论

Depth map extraction based on geometry

Depth map extraction based on geometry

引用

IEEE Southeastcon

作者： Difan Zhao Yannan Ren Jiande Sun Wei Liu Ju Liu Department of Electrical and Computer Engineering Duke University Durham USA School of Information Science and Engineering Shandong University Jinan China Hisense State Key Laboratory of Digital Multi-Media Technology Company Limited Qingdao China

ISBN: (纸本)9781467313742

This paper presents a novel depth map generation method based on geometric information. Our method divides a 2d image into two parts-the foreground and the background. Through extracting the predominant lines and vanishing point of the background, the background depth map is determined. Then we use this depth map as a `scalar' to measure the depth value of the foreground object. Finally, the depth map of the foreground and the background are integrated into one depth map by a depth fusion algorithm.

关键词： Image edge detection Geometry Heuristic algorithms Three dimensional displays Legged locomotion Data mining Educational institutions

来源：评论

学校读者我要写书评

暂无评论

A depopulation embedded system model in urban environments

A depopulation embedded system model in urban environments

引用

IEEE Conference on Technologies for Homeland Security

作者： C. Wright Brown K. Nyarko D. Karimou H. Saliah-Hassane School of Science Information Arts and Technologies University of Baltimore Baltimore USA Department of Electrical and Computer Engineering Morgan State University Baltimore USA Science & Technology Department University of Quebec Montreal Canada

The threat of terrorism is a constant reminder of the significance of developing effective strategies to safeguard the population. This is particularly important in large, densely populated areas, which can often be the primary targets of a terrorist attack. In such a situation, the implementation of a depopulation plan becomes very challenging to manage. This paper explores one possible method of addressing rapid evacuation of densely populated urban environments in response to a terrorist threat through an in-vehicle embedded system model. The objective of the model is to determine feasible technologies that enable mobile ad-hoc mesh communication to safely depopulate an urban area.

关键词： Vehicles Servers Mobile communication Ad hoc networks Terrorism Embedded systems Sensors

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：