检索结果-内蒙古大学图书馆

2010 IEEE International Conference on Industrial Technology (ICIT 2010)

作者： A. S. Brandao M. Sarcinelli-Filho R. Carelli Graduate Program on Electrical Engineering Federal University of Espirito Santo Vitoria ES Brazil Institute of Automatics National University of San Juan San Juan (Capital) Argentine

ISBN: (纸本)9781424456956

This work proposes a nonlinear controller for an autonomous helicopter, to track a given 3D trajectory. The starting point is a dynamic model obtained using the Euler-Lagrange formulation, considering the aircraft as a rigid body. The first contribution is the proposal of a suitable control law considering the nonlinear model, with no linearization strategy, and a proof of the stability of the closed-loop system that embeds such controller. The second contribution is the fact that the proposed controller is based on the inverse dynamics, focusing on its underactuated-system character. Finally, simulation results are presented and discussed, which validate the proposed controller.

关键词： Controllers autonomous helicopters trajectory tracking Lagrange formulation inverse kinematics Nonlinear Models control law Closed loop systems Helicopters Aircraft Miniature Proof nonlinearity Simulation results

来源：评论

学校读者我要写书评

暂无评论

Ontology engineering

引用

Nature Biotechnology 2010年第2期28卷 128-130页

作者： Alterovitz, Gil Xiang, Michael Hill, David P. Lomax, Jane Liu, Jonathan Cherkassky, Michael Dreyfuss, Jonathan Mungall, Chris Harris, Midori A. Dolan, Mary E. Blake, Judith A. Ramoni, Marco F. Children's Hospital Informatics Program Harvard-MIT Division of Health Sciences and Technology Harvard Medical School Boston MA United States Partners Healthcare Center for Personalized Genetic Medicine Boston MA United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA United States Jackson Laboratory Bar Harbor ME United States EMBL-EBI Wellcome Trust Genome Campus Hinxton United Kingdom Department of Biology Massachusetts Institute of Technology Cambridge MA United States Lawrence Berkeley National Laboratory Berkeley CA United States

来源：评论

学校读者我要写书评

暂无评论

An agent framework to support sensor networks' setup and adaptation

An agent framework to support sensor networks' setup and ada...

引用

International Multiconference on Computer Science and Information Technology, IMCSIT '09

作者： De Freitas, Edison Pignaton Heimfarth, Tales Ferreira, Armando Morado Wagner, Flávio Rech Pereira, Carlos Eduardo Larsson, Tony IDE Halmstad University Halmstad Sweden Institute of Informatics UFRGS Porto Alegre Brazil Computer Science Department UFLA Lavras Brazil Defense Engineering Graduate Program Military Institute of Engineering Rio de Janeiro Brazil

ISBN: (纸本)9781424453146

Sensor networks are being used in several emerging applications not even imagined some years ago due to advances in sensing, computing, and communication techniques. However, these advances also pose various challenges that must be faced. One important challenge is related to the autonomous capability needed to setup and adapt the networks, which decentralizes the control of the network, saving communication and energy resources. Middleware technology helps in addressing this kind of problem, but there is still a need for additional solutions, particularly considering dynamic changes in users' requirements and operation conditions. This paper presents an agent-based framework acting as an integral part of a middleware to support autonomous setup and adaptation of sensor networks. It adds interoperability among heterogeneous nodes in the network, by means of autonomous behavior and reasoning. These features also address the needs for system setup and adaptations in the network, reducing the communication overhead and decentralizing the decision making mechanism. Additionally, preliminary results are also presented. © 2009 IEEE.

关键词： Middleware

来源：评论

学校读者我要写书评

暂无评论

Simultaneous measurement of bending curvature and axial stress using D-shaped fiber Bragg gratings

Simultaneous measurement of bending curvature and axial stre...

引用

2009 International Conference on Optical Instruments and Technology, OIT'09

作者： Tien, Chuen-Lin Cheng, Tzu-Chung Chen, Li-Chieh Lin, Gui-Ru Liu, Wen-Feng Department of Electrical Engineering Feng Chia University 100 Wenhwa Rd Taichung Taiwan Graduate Institute of Electrical and Communications Engineering Ph. D. Program Feng Chia University 100 Wenhwa Rd Taichung Taiwan

ISBN: (纸本)9780819478948

Simultaneous measurement of the bending curvature and axial stress by using dual fiber Bragg gratings and a side-polished technique is presented. Curvature measurement, using side-polished fiber Bragg gratings with different thicknesses ranging from 93.94 to 70.66 μm shows corresponding sensitivities from 0.096 to 0.402 nm/m-1 for bending curvatures in the range of 0 - 3 m-1. The simultaneous axial stress is measured based on the shift in the Bragg wavelength and ranges from 0.008 - 0.128 GPa. A maximum sensitivity of 13.83 nm/GPa is demonstrated. © 2009 SPIE.

关键词： Fiber Bragg gratings

来源：评论

学校读者我要写书评

暂无评论

Robust tracking with H∞ performance for PWM systems

引用

Automatica 2009年第8期45卷 1808-1818页

作者： Fujioka, Hisaya Kao, Chung-Yao Almér, Stefan Jönsson, Ulf Graduate School of Informatics Kyoto University Kyoto 606-8501 Japan Department of Electrical Engineering National Sun Yat-Sen University Kaohsiung 80424 Taiwan Automatic Control Laboratory Swiss Federal Institute of Technology Zurich Physikstrasse 3 8092 Zurich Switzerland Division of Optimization and Systems Theory Royal Institute of Technology 10044 Stockholm Sweden

Control synthesis for robust tracking is considered for a class of pulse-width modulated systems that appear, for example, in power electronics applications. The control objective is to regulate a high frequency ripple signal to robustly track a constant reference signal in an average sense. To achieve this goal, a new H∞ control problem with integral action and average sampling is proposed. The solution of this problem involves a hybrid lifting framework which requires a careful elaboration in order to develop an algorithm that allows one to solve the design problem by the standard state space formulas for H∞ control. The design procedure is verified on a synchronous buck converter. © 2009 Elsevier Ltd. All rights reserved.

关键词： Pulse width modulation

来源：评论

学校读者我要写书评

暂无评论

Understanding quantification of microvascularity with high-frequency power Doppler ultrasound

Understanding quantification of microvascularity with high-f...

引用

Medical Imaging 2009: Ultrasonic Imaging and Signal Processing

作者： Pinter, Stephen Z. Lacefield, James C. Biomedical Engineering Graduate Program Departments of Electrical University of Western Ontario London ON Canada Department of Electrical and Computer Engineering University of Western Ontario London ON Canada Department of Medical Biophysics University of Western Ontario London ON Canada Robarts Research Institute University of Western Ontario London ON Canada

ISBN: (纸本)9780819475169

High-frequency power Doppler imaging of angiogenesis can be challenging given the presence of small blood vessels and slow flow velocities. In the presence of substantial Doppler artifacts such as false-positive color pixels or undetected vessels, color pixel density (CPD) and related vascularity metrics do not provide accurate estimates of vascular volume fraction. As a step towards improved microvascular quantification, flow-phantom experiments were performed to establish relationships between CPD and wall filter cut-off velocity for various combinations of vessel size (160, 200, 250, 300, and 360 μm), flow velocity (4, 3, 2, 1, and 0.5 mm/s), and transducer frequency (30 and 40 MHz). Three distinct regions were observed in plots of CPD versus wall filter cut-off velocity: overestimation of CPD at low cut-offs, underestimation of CPD at high cut-offs, and a plateau at intermediate cut-offs. The CPD at the plateau closely matched the phantom's actual vascular volume fraction. The length of the plateau corresponded with the flow-detection performance of the Doppler system, which was assessed using receiver operating characteristic analysis. Color pixel density versus wall filter cut-off curves from analogous in vivo experiments exhibited the same shape, including a distinct CPD plateau. The similar shape of the flow-phantom and in vivo curves suggests that the presence of a plateau can be used to identify the best-estimate CPD value in an in vivo experiment. The ability to identify the best CPD estimate is expected to improve quantification of angiogenesis and anti-angiogenic treatment responses with power Doppler. © 2009 SPIE.

关键词： Flow velocity

来源：评论

学校读者我要写书评

暂无评论

An improved group search optimizer for mechanical design optimization problems

引用

Progress in Natural Science:Materials International 2009年第1期19卷 91-97页

作者： Hai Shena,b,c,Yunlong Zhu a,Ben Niu a,b,Q.H.Wu d a Key Laboratory of Industrial informatics,Shenyang institute of Automation,Chinese Academy of Sciences,Shenyang 110016,China b graduate School of the Chinese Academy of Sciences,Beijing 100049,China c College of Physics Science and Technology,Shenyang Normal University,Shenyang 110034,China d Department of electrical engineering and Electronics,The University of Liverpool,Brownlow Hill,Liverpool,L69 3GJ,UK [a]Key Laboratory of Industrial Informatics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110016 China [b]Graduate School of the Chinese Academy of Sciences Beijing 100049 China [c]College of Physics Science and Technology Shenyang Normal University Shenyang 110034 China [d]Department of Electrical Engineering and Electronics The University of Liverpool Brownlow Hill Liverpool L69 3GJ UK

This paper presents an improved group search optimizer(iGSO) for solving mechanical design optimization *** the proposed algorithm,subpopulations and a co-operation evolutionary strategy were adopted to improve the global search capability and convergence *** iGSO is evaluated on two optimization problems of classical mechanical design:spring and pressure *** experimental results are analyzed in comparison with those reported in the *** results show that iGSO has much better convergence performance and is easier to implement in comparison with other existing evolutionary algorithms.

关键词： Mechanical optimization problem GSO Constrained optimization problem

来源：评论

学校读者我要写书评

暂无评论

Integrated telehome care with community-based health information system

Integrated telehome care with community-based health informa...

引用

2009 1st International Conference on Wireless Communication, Vehicular Technology, Information Theory and Aerospace and Electronic Systems Technology, Wireless VITAE 2009

作者： Chen, Heng-Shuen Su, Mei-Ju Zhang, Han-Wei Chen, Robert Guo, Fei-Ran Teng, Shih-Shung Dept. of Medical Informatics College of Medicine National Taiwan University Taiwan Graduate Institute of Electronics Engineering College of EE and CS National Taiwan University Taiwan Graduate Institute of Electrical Engineering College of EE and CS National Taiwan University Taiwan Department of Physiology University of Toronto Canada Department of Family Medicine National Taiwan University Hospital Taiwan Young-Ho Branch Caridinal Tien Hospital Taiwan

ISBN: (纸本)9781424440672

Even as the 21st Century dawns, Taiwan has already become an aging society. As of 2007, more than 10% of the population is composed of elderly people over 65 years of age. Due to a decrease in total fertility rate to 1.1 in 2008, the proportion of elderly people in the general population will increase more rapidly in the next two decades. The increasingly elderly population, coupled with a corresponding shortage of productive manpower, means that many elderly people are living alone or without a designated caregiver during the day. In this study, a health management center with a community-based health information system platform was integrated with a community hospital and primary care family doctors to provide telehome care for elderly people with chronic diseases or disabilities. © 2009 IEEE.

关键词： Information management

来源：评论

学校读者我要写书评

暂无评论

Registration of finger vein image using skin surface information for authentication

Registration of finger vein image using skin surface informa...

引用

Image Processing: Machine Vision Applications II

作者： Noh, SeungWoo Kong, Hyoun-Joong Park, SangYun Kim, JiMan Lee, Seung-Rae Kim, Taejeong Kim, Hee Chan Interdisciplinary Program Bioengineering Major Graduate School Seoul National University Seoul Korea Republic of Interdisciplinary Program Biomedical Engineering Major Graduate School Seoul National University Seoul Korea Republic of Institute of Medical and Biological Engineering Medical Research Center Seoul National University Seoul Korea Republic of Department of Electrical Engineering and Computer Sciences Seoul National University Seoul Korea Republic of Department of Biomedical Engineering College of Medicine Seoul National University Seoul Korea Republic of

ISBN: (纸本)9780819475015

The finger vein image acquired with an acquisition system should be properly aligned to proceed with comparing algorithm. However it is not easy to find control the points since the images are naturally blurred with an inherent scattering property. To overcome this problem, we propose a novel finger vein registration method utilizing skin surface information (i.e. wrinkles and outlines). We assumed that finger crooking was insignificant. Images were sampled with intended translation and rotation. Each time, two images were acquired successively by switching the light source;one with infrared light and the other with white light. Degree of rotation and translation of sampled image were calculated using outline features in the white light image and then the infrared image was transformed according to the calculated data. To validate our method, correlation values were computed between identical subjects and different subjects. High correlation values were shown between identical subjects whereas low values were shown between different subjects. © 2009 SPIE.

关键词： Authentication

来源：评论

学校读者我要写书评

暂无评论

A novel fabrication of Cu-Mn alloy films by chemical displacement process

A novel fabrication of Cu-Mn alloy films by chemical displac...

引用

Copper Interconnects, New Contact Metallurgies/Structures, and Low-K Inter-Level Dielectrics - 214th ECS Meeting

作者： Lin, Li-Min Yang, Wen-Luh Dai, Ming-Jie Yang, Tsong-Jen Yang, Chin-Hao Huang, Fang-Tse Wang, Chin-An Huang, Shin-Yi Graduate Institute of Electrical and Communications Engineering Ph.D. Program Feng Chia University Taiwan Department of Electronic Engineering Feng Chia University Taiwan Department of Material Science Feng Chia University Taiwan P. O. BOX 25-239 Taichung 40724 Taiwan

ISBN: (纸本)9781615672936

The Cu-Mn alloy films have been successfully fabricated by a novel chemical displacement process. The surface morphologies and displacement rate of Cu-Mn with pH values and temperatures are investigated in this paper. Furthermore, this chemical displacement is a selective deposition between Si and SiO 2, this predominance can apply to self-formed metal layer. The chemical displacement process provides a solution to satisfy for 32 nm node Cu-Mn alloy self-formed barrier requirement. ©The Electrochemical Society.

关键词： Manganese alloys

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：