检索结果-内蒙古大学图书馆

9th International Conference on Electronic Measurement and Instruments, ICEMI 2009

作者： Li, TongBo Wang, Heng Wang, Ping Kim, Yeon Key Laboratory of Network Control and Intelligent Instrument Chongqing University of Posts and Telecommunications Ministry of Education Chongqing 400065 China Dept. of Computer Science and Engineering Konkuk University 1 Hwayang-dong Gwangjin-gu Seoul 143-701 Korea Republic of

ISBN: (纸本)9781424438624

In harsh industrial environment, industrial wireless networks need high quality performance at real-time, deterministic schedule, reliability and low-power consumption, and so on, or it will bring disastrous consequences to the industrial field. The existing industrial wireless network can not fundamentally solve the multi-hop network beacon collision, thus it will influence its real-time capability, the demand for certainty and reliability. This requires a method of scheduling uncertainties communications star-based network to standardize the channel access mechanisms, multi-hop network and to address the mutual interference, thus completing the tree network scheduling. So, the problem of beacon collision in Multi-hop network will be solved and it can be widely applied to industrial wireless network. ©2009 IEEE.

关键词： Time division multiple access

来源：评论

学校读者我要写书评

暂无评论

Research and implementation of security mechanism in ISA100.11a networks

Research and implementation of security mechanism in ISA100....

引用

9th International Conference on Electronic Measurement and Instruments, ICEMI 2009

作者： Zhang, Xuan Wei, Min Wang, Ping Kim, Yeon Key Laboratory of Network Control and Intelligent Instrument Chongqing University of Posts and Telecommunications Ministry of Education Chongqing 400065 China Dept. of Computer Science and Engineering Konkuk University 1 Hwayang-dong Gwangjin-gu Seoul 143-701 Korea Republic of

ISBN: (纸本)9781424438624

The deployment of wireless technologies for device communication in the industrial control field is a challenging and promising issue mainly due to the increasing flexibility and the mobility. However, with limited resources such as computation capability and memory, traditional security solutions can not guarantee security requirements and communications overhead in industrial wireless networks. The ISA100.11a standard defines the protocol suite, system management, gateway, and security specifications for low-data-rate wireless connectivity with fixed, portable, and moving devices supporting very limited power consumption requirements. In this paper, the security architecture and security protocol stack for ISA100.11a networks are proposed. Furthermore, we survey security service measures to improve data confidentiality and integrity, and to prevent some attacks including reply attack. Finally, our test results show these security measures may enhance the security reliability of the ISA100.11a network communication. ©2009 IEEE.

关键词： Gateways (computer networks)

来源：评论

学校读者我要写书评

暂无评论

A Simulation Study of Consensus Speed over Scale-Free Networks

引用

IFAC Proceedings Volumes 2009年第22期42卷 74-79页

作者： Wei Sun YangQuan Chen Dept. of Automatic Control Beijing Institute of Technology Beijing 100081 China Center for Self-Organizing and Intelligent Systems (CSOIS) Dept. of Electrical and Computer Engineering Utah State University Logan UT 84322 USA

Scale-free network and consensus among multiple agents have both drawn quite much attention. To investigate the consensus speed over scale-free networks is the main topic in this paper. Given a set of different values for the power-law distribution parameter γ, and a set of different values for the minimum degree ( d min ) for the nodes, the algebraic connectivity (λ 2 ) of the network topology is studied, as well as the time ( t c ) (or iteration ( k c ), for discrete algorithm) taken to reach consensus. The results exhibit that λ 2 decreases while γ increases. The λ 2 increases monotonically as d min grows, and they fit very well in a linear relationship. t c (or k c ) decreases as γ reduces and d min increases. Via observing the behavior of the largest eigenvalue (λ n ) of the Laplacian of the network topology, we draw the conclusion that the robustness over time delays declines while the robustness over node-failures and edge-failures increases.

关键词： Scale-free network consensus algebraic connectivity network robustness

来源：评论

学校读者我要写书评

暂无评论

Optimization based synthesis of state derivative feedback controllers for retarded systems

Optimization based synthesis of state derivative feedback co...

引用

作者： McGahan, Paul Vyhlídal, Tomáš Michiels, Wim Dept. of Instrumentation and Control Eng. Faculty of Mechanical Engineering Czech Technical University in Prague Technická 4 166 07 Praha 6 Czech Republic Department of Computer Science Katholieke Universiteit Leuven Celestijnenlaan 200A B-3001 Heverlee Belgium

ISBN: (纸本)9783902661678

The paper presents an optimization based algorithm for stabilizing retarded systems using a state derivative feedback controller. It is shown that an application of such a controller results in neutral dynamics of the closed loop system if small feedback delays occur. Therefore, the strong stability theory of neutral systems needs to be considered in the controller synthesis problem. The stabilization approach is based on minimizing the spectral abscissa of the closed loop system over the controller parameter space, subject to a strong stability constraint. Copyright © 2009 IFAC.

关键词： Time delay

来源：评论

学校读者我要写书评

暂无评论

Saving Electrical Power in a Surveillance Environment

Saving Electrical Power in a Surveillance Environment

引用

International Conference on Advances in Pattern Recognition (ICAPR)

作者： Souvik Sen Amit Kumar Das Shyama Prosad Chowdhury Department of Electrical & Computer Engineering Duke University USA CST Dept. BESU Shibpur Intelligent Systems & Control Queen''s University UK

This paper proposes a smart video surveillance system with real-time moving object (primarily human) detection and identification for solving the problem of excessive power consumption in indoor public places. The proposed detection system is able to handle several known constraints such as changing illumination conditions, occlusion, clutter or even irrelevant extraneous motion. It keeps track of the number of humans in the vicinity and takes measures to gradually increase or decrease the luminosity depending on the number of people within its sight.

关键词： Humans Object detection Video surveillance Lighting control systems Real time systems Object recognition Application software Video sequences Pattern recognition

来源：评论

学校读者我要写书评

暂无评论

JPEG 2000 and Digital Watermarking Technique Using in Medical Image

JPEG 2000 and Digital Watermarking Technique Using in Medica...

引用

2009 Third IEEE International Conference on Secure Integration and Reliability Improvement SSIRI 2009(第三届IEEE安全软件集成及可信性改进国际会议)

作者： Sung-Jin Lim Seung-Hoon Chae Hae-Min Moon Yongwha Chung Sung Bum Pan Dept. of Information and Communication Engineering Chosun University Dong-gu Gwangju Korea Dept. of Information and Communication Engineering Chosun University Dong-gu GwangjuKorea Dept. of Computer and Information Science Korea University Chochiwon ChungnamKorea Dept. of Control Instrumentation and Robot Engineering Chosun University Dong-gu Gwangju Korea

ISBN: (纸本)9780769537580

The Picture Archiving and Communication System(PACS)was introduced for computerization of the medical system and telediagnosis between the hospital. It is becoming possible to create, store, and transmit medical images via PACS. There has been a growing interest in protecting medical images with an enormous amount of information. To improve transmission speed among the hospitals, the medical image should be compression JPEG 2000 by high compression ratio. This paper proposes an algorithM that utilizes both JPEG 2000 and robust watermarking for protection and compression of the medical image. With the proposed algorithm, it takes considerably less time to do JPEG 2000 and watermarking than when they are done separately. Based on the experiment results, it takes 0.72 second for the proposed algorithm and 1.11 second when they are done separately. We confirmed that the proposed algorithM was faster than when they are done separately.

关键词： Digital watermarking medical image JPEG 2000

来源：评论

学校读者我要写书评

暂无评论

Robust Model Predictive control of continuous-time sampled-data nonlinear systems with Integral Sliding Mode

Robust Model Predictive Control of continuous-time sampled-d...

引用

European control Conference (ECC)

作者： M. Rubagotti D.M. Raimondo A. Ferrara L. Magni Dept. of Computer Engineering and Systems Science University of Pavia Pavia Italy Automatic Control Laboratory Swiss Federal Institute of Technology Zürich Switzerland

A hierarchical Nonlinear Model Predictive control (NMPC) scheme with guaranteed Input-to-State-practical-Stability (ISpS) is proposed. The controller is formed by an Integral Sliding Mode (ISM) controller and a NMPC one. The ISM, relying on the knowledge of the nominal continuous-time model of the system and of the piecewise constant control signal generated by the NMPC produces a control action aimed at reducing the difference between the dynamics of the nominal closed-loop system and the actual evolution of the state. The NMPC in this way can be designed based on a system with reduced uncertainty. In order to prove the stability of the overall control scheme, some general Regional ISpS results for continuous-time systems are proven.

关键词： Robustness Closed loop systems Uncertainty Stability analysis Economic indicators Manifolds Predictive control

来源：评论

学校读者我要写书评

暂无评论

A study on digital control of 3-D.O.F. BLDCM using LabVIEW

A study on digital control of 3-D.O.F. BLDCM using LabVIEW

引用

International Conference on Telecommunications Energy (INTELEC)

作者： Joonseon Ahn Sung Chul Go Seungjoo Kim Ju Lee Hee-jun Kim Dept. of Electrical Eng. Osan University Korea Dept. of Electrical Enz. Hanyang University Korea Department of Electrical Control and Instrumentation Biomedical Engineering Hanyang University South Korea Dept. of Electrical Hanyana University Korea Dept. of Electrical Eng. and Computer Science Hanyang University Korea

ISBN: (纸本)9781424424900

In this paper, authors are proposed drive system for BLDCM using motor drivers based on LabVIEW. Most researchers generally use Matlab/Simulink program as computer simulation tool for their control system design. These control system must be coded to the motor drivers using program language such as C for its verification. We developed drive system using LabVIEW, it is able to complete whole process from control system design to verification of control system without program coding. Authors also proposed power conversion stack designed for LabVIEW controller and BLDCM drive.

关键词： Digital control

来源：评论

学校读者我要写书评

暂无评论

Optimization based synthesis of state derivative feedback controllers for retarded systems

引用

IFAC Proceedings Volumes 2009年第14期42卷 162-167页

作者： Paul McGahan Tomás Vyhlídal Wim Michiels Center for Applied Cybernetics Dept. of Instrumentation and Control Eng. Faculty of Mechanical Engineering Czech Technical University in Prague Technická 4 166 07 Praha 6 Czech Republic Department of Computer Science Katholieke Universiteit Leuven Celestijnenlaan 200A B-3001 Heverlee Belgium

关键词： Time Delay State Derivative Feedback Strong Stability Delay Structure

来源：评论

学校读者我要写书评

暂无评论

Quasi-direct pole placement for time delay systems applied to a heat transfer set-up

引用

IFAC Proceedings Volumes 2009年第14期42卷 325-330页

作者： Tomáš Vyhlídal Wim Michiels Pavel Zítek Center for Applied Cybernetics Dept. of Instrumentation and Control Eng. Faculty of Mechanical Engineering Czech Technical University in Prague Technicka 4 166 07 Praha 6 Czech Republic Department of Computer Science Katholieke Universiteit Leuven Celestijnenlaan 200A B-3001 Heverlee Belgium

A method for quasi-direct pole placement is presented for a class of retarded time delay systems with a single control input. The pole placement is done in two steps. First, a number of dominant poles, smaller than the number of controller parameters, are directly assigned. This leads to constraints on the controller parameters. By using the singular value decomposition a simple parameterization of all controllers satisfying these constraints is obtained. In the second step, the remaining degrees of freedom in the parameter space are used to shift the remaining part of the system spectrum as far to the left as possible. It is done using an optimization procedure for nonsmooth, nonconvex functions. An extensive real-plant example is presented to demonstrate the application of the novel pole placement procedure.

关键词： Retarded system pole placement singular value decomposition nonsmooth optimization

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：