检索结果-内蒙古大学图书馆

IEEE International Workshop on Haptic, Audio and Visual Environments and Their Applications

作者： Mehrdad H. Zadeh David Wang Eric Kubica Electrical and Computer Engineering Department University of Waterloo Canada Department of Systems Design Engineering University of Waterloo Canada

designing haptic displays is one of the main challenges in creating virtual reality systems with the sense of touch. The design of the hardware and software of haptic interfaces depends critically on the capabilities of the human haptic system. For example, force feedback interfaces, due to inherent hardware limitations such as friction and actuator saturation, present forces to users in the case of interactions with a virtual environment which are only approximations of the forces that they would feel if they were interacting with the real world. Thus, quantitative human studies are required to obtain the impact on human performance of these approximations in the forces from the haptic devices. First, the focus of this paper is on the quantitative measures of human factors (force thresholds) that affect the design specifications of force feedback haptic interfaces when the human user or the object are in relative motion. Second, the effects of two direction of forces and the increment/decrement of forces are also studied through two experiments. It appears that the JNDs of human force perception depend on the force direction and the force increment/decrement, and these two variables must be incorporated in an efficient haptic design technique when the user's hand is in motion.

关键词： Human factors Haptic interfaces Virtual environment Force feedback Hardware Force measurement Displays Virtual reality Friction Actuators

来源：评论

学校读者我要写书评

暂无评论

Location-Based Message Aggregation in Vehicular Ad Hoc Networks

Location-Based Message Aggregation in Vehicular Ad Hoc Netwo...

引用

IEEE Globecom Workshops

作者： Hanan Saleet Otman Basir Department of Systems Design Engineering University of Waterloo ONT Canada Department of Electrical and Computer Engineering University of Waterloo ONT Canada

In vehicular ad hoc networks, vehicles cooperate in receiving and delivering messages to each other in ad hoc manner without the need for an expensive fixed infrastructure. Nevertheless, inter-vehicle communications require solving the problem of message routing, where the location of the destination node is unknown due to node mobility and lack of adequate infrastructure. Hence, the problem of finding the location of the destination node (node localization) becomes very complex. One of the most recent solution approaches for node localization in VANET is to use location service management protocols. However, major impediments in leveraging such promising solutions include the large volume of signaling overhead which results from the increase in the number of vehicles and/or the non-local communication traffic in the network. In this paper, a region-based location service management protocol (RLSMP) is proposed. This protocol is a self-organizing framework, which uses message aggregation enhanced by geographical clustering to minimize the volume of the signaling overhead. RLSMP is the first protocol that uses message aggregation in querying, and promises scalability, locality awareness, minimum signaling overhead and maximum channel utilization.

关键词： Ad hoc networks Protocols Network servers Vehicles Costs Information retrieval Large-scale systems Automotive engineering design engineering systems engineering and theory

来源：评论

学校读者我要写书评

暂无评论

Teaching and mentoring research experiences for undergraduates in power electronics

Teaching and mentoring research experiences for undergraduat...

引用

114th Annual ASEE Conference and Exposition, 2007

作者： Sterk, Doug Thacker, Tim Tranter, Elizabeth Goff, Richard Terpenny, Janis Virginia Tech. United States Bradley Department of Electrical and Computer Engineering Virginia Tech. United States Center for Power Electronic Systems Department of Innovation in Engineering Education Department of Engineering Education Virginia Tech. United States Department of Engineering Education NSF Multi-University Center for E-Design ASEE ASME IIE Alpha Pi Mu

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

The Women in Science and engineering (WiSE) program at the University of Southern California: Achievements and challenges of the first five years

The Women in Science and Engineering (WiSE) program at the U...

引用

114th Annual ASEE Conference and Exposition, 2007

作者： Hawkes, Nicole Morrison, Jean Raghavendra, Cauligi WiSE University of Southern California United States University of Southern California United States Program University of Southern California United States Department of Earth Sciences Program USC Viterbi School of Engineering United States Departments of Electrical Engineering-Systems and Computer Science University of Southern California United States

The establishment of the Women in Science and engineering (WiSE) Program represents the serious commitment of the University of Southern California to address the under-representation of women in science and engineering. Since the launch of the program in 2000, WiSE has helped to more than double the number of tenured and tenure-track women faculty at USC from 15 to 35, through its recruitment and retention programs. Its complimentary programs to support undergraduates, graduate students, and postdoctoral scholars through a range of financial awards and activities have also grown in scope and impact. This paper describes the programs developed and administered by WiSE, the perceived successes to date, the challenges that remain, and the future directions of the program to ensure continued progress toward gender equity in science and engineering at USC. Through an analysis of the WiSE Program at USC, we hope to present a model from which others can draw on to tackle the same issues at their own institutions. © American Society for engineering Education, 2007.

关键词： engineering education

来源：评论

学校读者我要写书评

暂无评论

Advances in Security Technologies: Imaging, Anomaly Detection, and Target and Biometric Recognition

Advances in Security Technologies: Imaging, Anomaly Detectio...

引用

Microwave, MTT-S International Symposium

作者： Joseph A. O'Sullivan Robert Pless Departments of Electrical and Systems Engineering Washington University St. Louis MO USA Departments of Computer Science and Engineering Washington University St. Louis MO USA

Security system design and analysis are constantly improving. There are advances in sensors, in system concept, and in signal and image processing that all contribute to these improvements. Several of these advances are discussed, with an emphasis on imaging sensors with a wide range of wavelengths and deployment scenarios. In order for a security system to provide timely, reliable information, the processing must be efficient and robust. Specific, yet generalizable, developments in surveillance systems and in recognition systems are detailed.

关键词： Security Biometrics Image recognition Target recognition Image sensors Biosensors System analysis and design Sensor systems Signal processing Image processing

来源：评论

学校读者我要写书评

暂无评论

Electricity Markets under Uncertainty

Electricity Markets under Uncertainty

引用

Power Tech Conference

作者： Juan Alvarez Kumaraswamy Ponnambalam Victor H. Quintana Electrical and Computer Engineering Department University of Waterloo Waterloo ONT Canada Systems Design Engineering University of Waterloo Waterloo ONT Canada

In the ideal world, electricity markets are solved under the assumption that all quantities are deterministic. This is the equivalent of assuming that one can perfectly predict future levels of demand and supply. In the real world, the biggest source of uncertainty comes precisely from demand and supply levels. A clear understanding of the economical implications of randomness from supply and demand in electricity markets is still lacking. Random variations of any kind introduce risk. Therefore, one would be interested in somehow minimizing the risk when solving an electricity market. This paper explains the economical implications of minimizing the risk introduced by supply and demand uncertainties. The risk minimization technique used in this work is based on the well known mean-variance Markowitz theory.

关键词： Electricity supply industry Uncertainty Supply and demand Power generation economics Economic forecasting Fuel economy Costs Risk management design engineering Power system economics

来源：评论

学校读者我要写书评

暂无评论

Multitarget tracking (MTT) in 3-D using 2-D particle filters with single passive sensor

Multitarget tracking (MTT) in 3-D using 2-D particle filters...

引用

50th Midwest Symposium on Circuits and systems

作者： Lee, Jinseok Cho, Shung Han Deng, Xi Hong, Sangjin Cho, We-Duke Mobile Systems Design Lab. Stony Brook University-SUNY Stony Brook NY 11794-2350 United States Dept. of Electrical and Computer Engineering Stony Brook University-SUNY Stony Brook NY 11794-2350 United States Dept. of Electronics Engineering College of Information Technology Ajou University South Korea

ISBN: (纸本)9781424411757

In this paper, we present an approach for multitarget association in 3 dimensional (3-D) space using independent 2-D based particle filters. The independent 2-D particle filters decompose the 3-D formulation and support multiple chances for the association. The proposed approach increases the association success rate. Furthermore, the approach is able to enhance the each target position estimation less sensitive to measurement noise. In this paper, we formulate the independent 2-D based particle filters for multitarget association and compare the performance to a conventional approach through the Cramer Rao Low Bound (CRLB).

关键词： Bandpass filters

来源：评论

学校读者我要写书评

暂无评论

TRACKING CONTROL IN THE PRESENCE OF NONLINEAR DYNAMIC FRICTIONAL EFFECTS: ROBOT EXTENSION

引用

Asian Journal of Control 2008年第3期1卷

作者： M. Feemster D.M. Dawson A. Behal W. Dixon Matthew Feemster received the B.S degree in Electrical Engineering from Clemson University Clemson South Carolina in December 1994. Upon graduation he remained at Clemson University and received the M.S. degree in Electrical Engineering in 1997. During this time he also served as a research/teaching assistant. His research work focused on the design and implementation of various nonlinear control algorithms with emphasis on the induction motor and mechanical systems with friction present. He is currently working toward his Ph.D. degree in Electrical Engineering at Clemson University. Darren M. Dawson was born in 1962 in Macon Georgia. He received an Associate Degree in Mathematics from Macon Junior College in 1982 and a B.S. Degree in Electrical Engineering from the Georgia Institute of Technology in 1984. He then worked for Westinghouse as a control engineer from 1985 to 1987. In 1987 he returned to the Georgia Institute of Technology where he received the Ph.D. Degree in Electrical Engineering in March 1990. During this time he also served as a research/teaching assistant. In July 1990 he joined the Electrical and Computer Engineering Department and the Center for Advanced Manufacturing (CAM) at Clemson University where he currently holds the position of Professor. Under the CAM director's supervision he currently leads the Robotics and Manufacturing Automation Laboratory which is jointly operated by the Electrical and Mechanical Engineering departments. His main research interests are in the fields of nonlinear based robust adaptive and learning control with application to electro-mechanical systems including robot manipulators motor drives magnetic bearings flexible cables flexible beams and high-speed transport systems. Aman Behal was born in India in 1973. He received his Masters Degree in Electrical Engineering from Indian Institute of Technology Bombay in 1996. He is currently working towards a Ph.D in Controls and Robotics at Clemson University. His research focuses on the control of no

In this paper, we extend the observer/control strategies previously published in [25] to an n -link, serially connected, direct drive, rigid link, revolute robot operating in the presence of nonlinear friction effects modeled by the Lu-Gre model. In addition, we also present a new adaptive control technique for compensating for the nonlinear parameterizable Stribeck effects. Specifically, an adaptive observer/controller scheme is developed which contains a feedforward approximation of the Stribeck effects. This feedforward approximation is used in a composite controller/observer strategy which forces the average square integral of the position tracking error to an arbitrarily small value. Experimental results are included to illustrate the performance of the proposed controllers.

关键词： Friction compensation nonlinear control

来源：评论

学校读者我要写书评

暂无评论

OPTIMAL CONTROL FOR TWO-DIMENSIONAL LINEAR systems WITH VARIABLE COEFFICIENTS

引用

Asian Journal of Control 2008年第4期1卷

作者： Jimshone Li Jason Sheng-Hong Tsai Leang-San Shieh Control System Laboratory Department of Electrical Engineering National Cheng Kung University Tainan 701 Taiwan R.O.C. Jim-Shone Li was born in Taiwan R. O.C. on April 20 1967. He received B.S. and M.S. degrees in Electrical Engineering from the Chung-Cheng Institute of Technology Taoyuan Taiwan R.O.C. in 1989 and 1993 respectively. He is currently a Ph.D. student at National Cheng-Kung University Tainan Taiwan R.O.C. His research interests include analysis and design of multidimensional systems and nonlinear system control. Department of Electrical and Computer Engineering University of Houston Houston TX 77004-4793 U.S.A.

An optimal control method for two-dimensional (2-D) linear systems with variable coefficients and free boundary conditions in Roesser's model is proposed in this paper. Based on Roesser's model, an equivalent general 1-D model of the 2-D system is presented, and the problem of minimizing a 2-D linear quadratic (LQ) cost function is solved for the case where complete state information is available. The solution is obtained by using the proposed dynamic programming in 1-D descriptor form to solve the Riccati equation and then arriving at the optimal control law and minimum cost. The proposed control methodology can be applied to discrete-time models of systems described by partial differential equations and can also be used in the field of signal processing.

关键词： Two-dimensional system optimal control Roesser's model Riccati equation

来源：评论

学校读者我要写书评

暂无评论

Multitarget association and tracking in 3-D space based on particle filter with joint multitarget probability density

Multitarget association and tracking in 3-D space based on p...

引用

IEEE Conference on Advanced Video and Signal Based Surveillance (AVSS)

作者： Jinseok Lee Byung Guk Kim Shung Han Cho Sangjin Hong We-Duke Cho Mobile Systems Design Laboratory Department of Electrical and Computer Engineering Stony Brook University-SUNY Stony Brook NY USA

This paper addresses the problem of 3-dimensional (3D) multitarget tracking using particle filter with the joint multitarget probability density (JMPD) technique. The estimation allows the nonlinear target motion with unlabeled measurement association as well as non-Gaussian target state densities. In addition, we decompose the 3D formulation into multiple 2D particle filters that operate on the 2D planes. Both selection and combining of the 2D particle filters for 3D tracking are presented and discussed. Finally, we analyze the tracking and association performance of the proposed approach especially in the cases of multitarget crossing and overlapping.

关键词： Particle tracking Particle filters Target tracking Radar tracking Filtering State estimation Diversity reception Performance analysis Space technology Two dimensional displays

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：