检索结果-内蒙古大学图书馆

International Multiconference on computer science and Information Technology, IMCSIT

作者： Pavel Moryc Jindrich Cernohorsky Faculty of Electrical Engineering and Computer Science Department of Measurement and Control Centre for Applied Cybernetics Technical University of Ostrava Ostrava Czech Republic

This paper compares task jitter measurement performed under RTLinux and RTX hard real-time operating systems. Both the operating environments represent hardware abstraction layer extensions to general-purpose operating systems, and make possible to create a real-time system according to the POSIX 1003.13 PSE 54 profile (multipurpose system). The paper is focused on discussion of experimental results, obtained on PC hardware, and their interpretation.

关键词： Jitter Operating systems

来源：评论

学校读者我要写书评

暂无评论

Nonlinear PI control for dissolved oxygen tracking at wastewater treatment plant

引用

IFAC Proceedings Volumes 2008年第2期41卷 13587-13592页

作者： Y. Han M.A. Brdys R. Piotrowski Department of Electronic Electrical and Computer Engineering The University of Birmingham Birmingham B15 2TT UK Department of Automatic Control Gdansk University of Technology ul. G. Narutowicza 11/12 80 952 Gdansk Poland

The paper addresses design, implementation and simulation of a novel type of softly switched Takagi-Sugeno fuzzy PI control system for dissolved oxygen concentration ( DO ) tracking at wastewater treatment plant ( WWTP ). The proposed control system is designed, including tuning the PI controllers, entirely based on the experimental data. This control system is validated by simulation.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Adaptive droop control applied to distributed generation inverters connected to the grid

Adaptive droop control applied to distributed generation inv...

引用

IEEE International Symposium on Industrial Electronics (ISIE)

作者： Juan C. Vasquez Josep M. Guerrero Eduard Gregorio Pedro Rodriguez Remus Teodorescu Frede Blaabjerg Department Automatic Control Systems and Computer Engineering Universitat Politecnica de Catalunya Barcelona Spain Department of Electrical Engineering Universitat Politecnica de Catalunya Terrassa Spain Institute of Energy Technology University of Aalborg Aalborg Denmark

This paper proposes a novel control for voltage source inverters connected to the grid. The control scheme is based on the droop method, and it uses some estimated variables from the grid such as the voltage and the frequency, and the magnitude and angle of the grid impedance. Hence, the inverter is able to inject independently active and reactive power to the grid. The controller provides a proper dynamics decoupled from the grid impedance. Simulation results are provided in order to show the feasibility of the control proposed.

关键词： Distributed control Programmable control Adaptive control Inverters Voltage Frequency Impedance Reactive power Adaptive filters automatic control

来源：评论

学校读者我要写书评

暂无评论

Infimal Feedback Capacity for a Class of Additive Coloured Gaussian Noise Channels

引用

IFAC Proceedings Volumes 2008年第2期41卷 5173-5178页

作者： A.J. Rojas R.H. Middleton J.S. Freudenberg ARC Centre of Excellence for Complex Dynamic Systems and Control School of Electrical Engineering and Computer Science The University of Newcastle 2308 Australia Hamilton Institute National University of Ireland Maynooth Co Kildare Ireland Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48109-2122 U.S.A.

In this paper we consider the infimal signal-to-noise ratio (SNR) required for stabilisation of a linear time invariant (LTI) scalar unstable plant over a class of additive coloured Gaussian noise channels. We apply recent results in the literature to obtain the feedback capacity of such a class of channels. We prove that the infimal SNR constrained LTI solution, when dealing with a scalar unstable plant, does achieve a channel feedback capacity equal to the infimal rate of transmission required for stability. The optimality of such channel feedback capacity is a non trivial result since we consider additive 1st order moving average (MA) and autoregressive moving average (ARMA) coloured noise.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Relative Error Issues in Sampled Data Models

引用

IFAC Proceedings Volumes 2008年第2期41卷 5047-5052页

作者： Graham C. Goodwin Juan I. Yuz Juan C. Agüero ARC Centre for Complex Dynamics Systems and Control School of Electrical Engineering and Computer Science The University of Newcastle Australia Electronics Engineering Department Universidad Técnica Federico Santa María Valparaíso Chile

Most real world systems operate in continuous time. However, to store, analyze or transmit data from such systems the signals must first be sampled. Consequently there has been on-going interest in sampled data models for continuous time systems. The emphasis in the literature to-date has been on three main issues namely the impact of folding, sampled zero dynamics and the associated model error quantification. Existing error analyses have almost exclusively focused on unnormalized performance. However, in many applications relative errors are more important. For example, high performance controllers tend to invert the system dynamics and consequently relative errors underpin closed loop performance issues including robustness and stability. This motivates us to examine the relative errors associated with several common sampled data model types. This analysis reveals that the inclusion of appropriate zero dynamics is essential to ensure that the relative error converges to zero as the sampling period is reduced.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Repeated Poles in Feedback over a Class of Signal-to-Noise Ratio Constrained Channels

引用

IFAC Proceedings Volumes 2008年第2期41卷 5179-5184页

作者： A.J. Rojas J.I. Yuz ARC Centre for Complex Dynamic Systems and Control School of Electrical Engineering and Computer Science The University of Newcastle 2308 Australia Department of Electronics Engineering Universidad Técnica Federico Santa María Valparaíso Chile

In the present paper we obtain a closed form expression for the squared H ⊥ 2 norm of a partial fraction expansion with repeated unstable poles. We also obtain a closed form expression for the squared H 2 norm of a partial fraction expansion with repeated stable poles. As an application we use the H ⊥ 2 result to extend the closed form solution of the discrete-time linear time invariant (LTI) signal-to-noise ratio (SNR) constrained problem to the case of repeated unstable poles in the plant model.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Development of a Novel Bidirectional control Telecare System over a Wireless Sensor Network and the Internet

Development of a Novel Bidirectional Control Telecare System...

引用

IEEE Asia-Pacific Conference on Services Computing (APSCC)

作者： You-Yin Chen Wen-Tzeng Huang Chin-Hsing Chen Yuan-Jen Chang Department of Electrical and Control Engineering National Chiao Tung University Taiwan Department of Computer Science and Information Engineering Minghsin University of Science and Technology Taiwan Department of Management Information Systems Central Taiwan University of Science and Technology Taiwan

The telecare system has become usable and accessible nowadays due to the development of information and communication technology. Its daily use has been made possible in long-term care through the use of wireless sensor networks. Unfortunately, the person in need of care may not be able to operate this sensor by him/herself. He/she is only able to turn this sensor on and off. Furthermore, he/she may be unconscious when an alert message is transferred. Against this backdrop, this paper therefore focuses on how the sensor can be automatically turned on to begin measuring physiological signals. In this research, a bidirectional sensor controlling design for a wireless sensor network with a Web-based interface using the Internet was proposed. Rich Internet application (RIA) technology was used to make a Web client-side user interface (UI) easier to use. Scalable vector graphics (SVG) technology, recommended by World Wide Web Consortium (W3C), was adopted to achieve dynamic charting of the browser. The combination of Ajax and SVG technology provides real-time interactivity and improves user experience on the use of the healthcare system. A complete system which includes the sensors, the wireless physiological detection network, the Web and database server, and the client side user interface was developed. To prove system reliability and accessibility, experiment and performance test of a real case were conducted.

关键词： Bidirectional control Wireless sensor networks IP networks User interfaces Communications technology automatic control Internet Graphics Web sites Real time systems

来源：评论

学校读者我要写书评

暂无评论

Direct Weight Optimization applied to discontinuous functions

Direct Weight Optimization applied to discontinuous function...

引用

IEEE Conference on Decision and control

作者： Henrik Ohlsson Jacob Roll Anders Brun Hans Knutsson Mats Andersson Lennart Ljung Division of Automatic Control Department of Electrical Engineering Linköping University Sweden Center for Medical Image Science and Visualization Linköping University Sweden Linkopings universitet Linkoping SE

ISBN: (纸本)9781424431236

The Direct Weight Optimization (DWO) approach is a nonparametric estimation approach that has appeared in recent years within the field of nonlinear system identification. In previous work, all function classes for which DWO has been studied have included only continuous functions. However, in many applications it would be desirable also to be able to handle discontinuous functions. Inspired by the bilateral filter method from image processing, such an extension of the DWO framework is proposed for the smoothing problem. Examples show that the properties of the new approach regarding the handling of discontinuities are similar to the bilateral filter, while at the same time DWO offers a greater flexibility with respect to different function classes handled.

关键词： Filters Smoothing methods Kernel Upper bound Nonlinear systems Image processing Jacobian matrices Biomedical informatics Biomedical imaging White noise

来源：评论

学校读者我要写书评

暂无评论

An Integrated Service Model for Telecare System

An Integrated Service Model for Telecare System

引用

IEEE Asia-Pacific Conference on Services Computing (APSCC)

作者： Chin-Hsing Chen Wen-Tzeng Huang You-Yin Chen Yuan-Jen Chang Department of Management Information Systems Minghsin University of Science and Technology Taiwan Department of Computer Science and Information Engineering and Material Science Minghsin University of Science and Technology Taiwan Department of Electrical and Control Engineering National Chiao Tung University Taiwan Department of Management Information Systems Department of Computer Science and Information Engineering and Material Science Minghsin University of Science and Technology Taiwan

The medical costs for elderly people in Taiwan have increased largely due to the increasing number of aging people in the country. To meet the goals and requirements of the National Health Insurance (NHI), designing and providing a program which would reduce the unnecessary medical services demanded by elderly people is needed. In this research, a conceptual service model of the telecare system applied in Taiwan is discussed and presented. The service model is discussed in three dimensions, namely, service, delivery, and content. In the service dimension, the services provided by telecare service should be accessible and responsible. In the delivery dimension, telecare service should be highly interactive and with high usability. Finally, in the content dimension, the content of telecare service must be individualized and based on userspsila needs. Most importantly, it must be comprehensive and authentic. Telecare service can be used as an important tool to assist nurses in nursing homes. It should be delivered by skilled nurses to increase the confidence of users. In district hospitals, doctors can substitute the weekly telecare service for traditional medical service. Therefore, the costs of NHI can be reduced. Moreover, the accessibility and interactivity of telecare service will give users greater satisfaction. The cooperation of nursing homes and district hospitals in the telecare service will not only improve the quality of long-term care but will also pave the way for the practice of telecare service in Taiwan.

关键词： Intserv networks Senior citizens Costs Medical services Hospitals Materials science and technology Aging Insurance Biomedical engineering Biomedical computing

来源：评论

学校读者我要写书评

暂无评论

Fuzzy neural network approach for fault diagnosis of power plant thermal system under different operating points

Fuzzy neural network approach for fault diagnosis of power p...

引用

IEEE General Meeting Power& Energy Society

作者： Liangyu Ma Kwang Y. Lee Automation Department School of Control Science and Engineering North China Electric Power University Baoding Hebei China Department of Electrical and Computer Engineering Baylor University Waco TX USA

Developing a practical fault diagnosis system for a power plant thermal system is important in ensuring safe and reliable operation of the whole power generation unit. It is a difficult task due to the complex structure of the thermal system and the variable operating points of the system. Although artificial neural networks are very efficient in thermal system fault diagnosis, their applications for fault diagnosis usually consider only a single operating point (usually at the full rated load). Thus a fuzzy neural network approach for thermal system fault diagnosis under different operating points is investigated in this paper. An extended fuzzy fault symptom calculation method suitable for different load is discussed. The feedwater heater system of a 300 MW coal-fired power generation unit is taken as a fault diagnosis example. Several diagnosis tests for different faults under different operating points are carried out on a full-scope simulator of the power unit. The results under different operating points demonstrate the fault diagnosis ability of the fuzzy neural network method.

关键词： Fault diagnosis Water heating Artificial neural networks Optimization Load modeling Training Heat pumps

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：