检索结果-内蒙古大学图书馆

SICE Annual Conference

作者： K. Inoue D. Mori K. Sugioka G. Pfurtscheller K. Kumamaru Department of Control Engineering and Science Factory of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan Department of Control Enginering and Science Kyusbu Institute of Technology Iizuka Fukuoka Japan Department of Medical Informatics Graz University of Technology Inffeldgasse Graz Austria

In this paper, feature extraction of EEG signals during right and left motor imagery is tried. As the extraction method, directed information analysis, pattern recognition based on AR model, and mixture probability algorithm based on AR model is used. The learning and feature extraction method in pattern recognition are discussed through the experimental studies.

关键词： Feature extraction Electroencephalography Brain modeling Monitoring Data mining Pattern recognition Information analysis Biomedical engineering Brain computer interfaces Clustering algorithms

来源：评论

学校读者我要写书评

暂无评论

An adaptive medium access control protocol for robot inter-communication in autonomous distributed systems

An adaptive medium access control protocol for robot inter-c...

引用

International Conference on Advanced Information Networking and Applications (AINA)

作者： J. Arai A. Koyama L. Barolli Graduate School of Science and Engineering Yamagata University Japan Department of Information and Control Engineering Yamagata College of Industry and Technology Japan Department of Informatics Yamagata University Japan Department of Information and Communication Engineering Fukuoka Institute of Technology Japan

In autonomous distributed robot systems many robots cooperate together to carry out many difficult tasks that single robots can not realize. But, in order to cooperate together the robots should communicate with each other. Therefore, the inter-communication among robots is very important problem to be solved. We propose an adaptive reservation-time division multiple access (AR-TDMA) medium access control protocol which can realize a real-time communication among robots in a heterogeneous environment by using a reservation mechanism. Also, by using an adaptive time slot allocation method, the protocol has a flexible behavior and can deal with the changes of number of robots. Furthermore, the proposed protocol can reduce the packet collision probability.

关键词： Programmable control Adaptive control Media Access Protocol Access protocols Service robots Medical robotics Multiaccess communication Mobile communication Time division multiple access control engineering

来源：评论

学校读者我要写书评

暂无评论

D15: Embedded control system with DSP for mini-robots

引用

IFAC Proceedings Volumes 2004年第20期37卷 429-433页

作者： David Vala Vilem Srovnal VŠB-Technical University of Ostrava Faculty of Electrical Engineering and Informatics Department of Measurement and Control 17.listopadu 15 708 00 Ostrava Poruba Czech republic

This contribution describes universal embedded system suitable for small motion robots. Most of the robots in this category are equipped at least 2 drive wheels with feedback for robot moving, RF link for the communication with host computer or between another ones, microcontroller for robot control, single power supply and interfaces for interconnection with sensors or actuators. Plenty of design of this electronic exist but usually are developed only for one specific application. Our system was designed for general use. It provides good performances of robots suitable also for application in robot soccer game and plenty of applications as testing AI, multiagents system as well as education purpose.

关键词： mobile robots embedded system robot control digital signal processor remote control robot soccer

来源：评论

学校读者我要写书评

暂无评论

A delay-dependent stability criterion of neutral systems and its application to a partial element equivalent circuit model

A delay-dependent stability criterion of neutral systems and...

引用

American control Conference (ACC)

作者： Dong Yue Qing-Long Han Department of Control Science and Engineering Nanjing Normal university Nanjing Jiangsu China Faculty of Informatics and Communication Central Queensland University Rockhampton QLD Australia Department of Control Science and Engineering Nanjing Normal university Nanjing Jiangsu P.R. China

The real circuit model, such as a partial element equivalent circuit (PEEC), can be represented as a delay differential equation (DDE) of neutral type. The study of asymptotic stability of this kind of systems is of much importance due to the fragility of DDE solvers. Based on a descriptor system approach, new delay-dependent stability results are derived by introducing some free-weighting matrices. As an application of the results, the delay-dependent stability problem of a PEEC model is investigated. The comparison of the results with the existing ones is finally given by using the PEEC model and another numerical example.

关键词： Circuit stability Stability criteria Equivalent circuits Differential equations Delay systems Circuit testing Asymptotic stability Uncertain systems Circuit synthesis control system synthesis

来源：评论

学校读者我要写书评

暂无评论

Stability of linear time invariant systems with interval fractional orders and interval coefficients

Stability of linear time invariant systems with interval fra...

引用

ICCC 2004 - Second IEEE International Conference on Computational Cybernetics

作者： Petráš, Ivo Chen, Yangquan Vinagre, Bias M. Podlubny, Igor Department of Informatics and Process Control BERG Faculty Technical University of Kosice B. Nemcovej 3 042 00 Kosice Slovakia Dept. of Electrical and Computer Engineering Utah State University Logan UT 84322-4160 United States Dept. of Electronic and Electromechanical Engineering Industrial Engineering School University of Extramadura Avda. De Elvas s/n 06071-Badajoz Spain

ISBN: (纸本)0780385888

This paper considers the stability of the fractional-order linear time-invariant systems with interval type uncertainties in both fractional orders and the relevant coefficients. It is an extension of our previous result on the robust stability analysis of the interval type uncertain fractional order LTI systems with crisply known fractional orders. We have proposed a stability check procedure for uncertain LTI systems with interval fractional orders and interval coefficients. The procedure is demonstrated with some simple examples. © 2004 IEEE.

关键词： System stability

来源：评论

学校读者我要写书评

暂无评论

A robust audio watermarking scheme

A robust audio watermarking scheme

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Hyoung Joong Kim Taehoon Kim In-Kwon Yeo Department of Control/Instrumentation Engineering Kangwon University Chuncheon South Korea Divison of Mathematics & Statistical Informatics Chonbuk National University of Korea Jeonju South Korea

ISBN: (纸本)078038251X

Spread-spectrum watermarking scheme adds random noise w into the host signal x to generate watermarked signal s. Blind detector computes inner product or its variants (i.e., correlation) and decides if the host signal contains embedded bits or not by its sign of the inner product. Such detection method may not be sufficiently robust in some applications due to high false-positive or false-negative rate. This paper introduces a method to reduce detection errors considerably by excluding outliers in the signal. First, this paper identifies the usefulness of the outliers. Second, this paper identifies the problem of outliers. Due to the vague definition of the outlier, it was impossible to draw unique criterion for outlier. Thus, third, stable and robust definition of outlier is adopted. Informed watermarking scheme for spread-spectrum is exploited to reduce false-positive and false-negative errors. Such detectors can also enhance detection rate in other watermarking schemes. This scheme can enhance robustness of image watermarking and audio watermarking as well.

关键词： Watermarking Spread spectrum communication Detectors Noise robustness Embedded computing Instruments Mathematics informatics Noise generators Signal generators

来源：评论

学校读者我要写书评

暂无评论

A theoretical diagnosis approach applied to a power transmission system

A theoretical diagnosis approach applied to a power transmis...

引用

IEEE Conference on Decision and control

作者： G.K. Fourlas K.J. Kyriakopoulos N.J. Krikelis Department of Informatics and Computer Technology Technological Educational Institute (TEI) of Lamia Lamia Greece Control Systems Laboratory Mechanical Engineering Department National and Technical University of Athens Athens Greece

ISBN: (纸本)0780386825

Fault detection and isolation is a challenging task in the control of large scale complex systems. In this work we proceed to the fault diagnosis of an electric power transmission system based on a fault diagnosis of hybrid systems method presented in our previous work. Power systems often exhibit complex behavior in response to large disturbances. Such behavior is characterized by interactions between continuous dynamics and discrete events. Components such as loads drive the continuous dynamics, while other components such as protection devices exhibit event-driven discrete dynamics. Therefore, power systems constitute an important case of hybrid systems for fault detection.

关键词： Power transmission Power system dynamics Hybrid power systems Power system protection Electrical fault detection Fault diagnosis Power system faults control systems Large-scale systems Drives

来源：评论

学校读者我要写书评

暂无评论

Multilevel validation of online monitor for hard real-time systems

Multilevel validation of online monitor for hard real-time s...

引用

International Conference on Microelectronics, MIEL

作者： M. Jevtic V. Zerbe S. Brankov Department of Electronics. Faculty of Electronic Engineering University of Nis Nis Serbia Department of System and Control Theory Faculty of Automation and Informatics Technische Universität llmenau Llmenau Germany

To achieve the required performance of complex electronic systems it is necessary to validate the system function during all phases of the design, which means multilevel validation. A hybrid Online Monitor for hard real time systems (HRTS) has been developed. A special attention was dedicated on the multilevel validation in all phases of the design.

关键词： Monitoring Real time systems Hardware System testing Kernel Runtime Automotive engineering Electrical equipment industry Automobiles Circuit faults

来源：评论

学校读者我要写书评

暂无评论

Efficient sensitivity computation for nonlinear model predictive control

引用

IFAC Proceedings Volumes 2004年第13期37卷 567-572页

作者： Morten Rode Kristensen John Bagterp Jørgensen Per Grove Thomsen Sten Bay Jørgensen 2-control ApS Høffdingsvej 34 Valby 2500 Denmark Department of Chemical Engineering Technical University of Denmark Lyngby 2800 Denmark Informatics and Mathematical Modeling Technical University of Denmark Lyngby 2800 Denmark

Dynamic optimization by multiple shooting requires integration and sensitivity calculation of the model ODEs as well as the cost function integral. A new semi-implicit Runge-Kutta algorithm for numerical sensitivity calculation of stiff systems of ordinary differential equations (ODEs) is presented. The algorithm calculates sensitivities with respect to problem parameters and initial conditions, exploiting the special structure of the sensitivity equations. The new algorithm is compared to an extrapolation method and to the more established BDF based approaches. Several advantages of the new approach are demonstrated, especially when frequent discontinuities are present. These advantages renders the new algorithm particularly suitable for dynamic optimization and nonlinear model predictive control.

关键词： Ordinary Differential equations Sensitivity Computation Nonlinear Model Predictive control

来源：评论

学校读者我要写书评

暂无评论

Filtering and contrast enhancement on subtracted direct digital angiograms

Filtering and contrast enhancement on subtracted direct digi...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： L. Nagy B. Benyo Department of Control Engineering and Information Technology Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Department of Informatics Széchenyi István University Gyor Hungary

This work presents the results of a research related to medical image subtraction algorithms. The selected area is of direct digital X-ray angiography, where subtraction algorithms are the basis of most acquisition and reviewing protocols. The goal of this research is to analyze the currently existing image subtraction algorithms and to propose a new approach based on the experienced limitations, respectively to develop a new imaging technique that allows both contrast agent and radiation dose reduction. The enhancement of the subtraction algorithms is targeted by two means: a) noise reduction on image frames, b) identification of contrast agent injected regions. Both aspects will be studied based on the analysis of the spatio-temporal signal variation that image pixel intensities represent, therefore the resulting algorithm can not be used real time during image acquisition, but as a post processing technique during review. The temporal variation of pixel intensities was then analyzed and a patter check was followed to identify pixels being part of a contrast agent injected region. This information was used to highlight regions of interest and to increase the contrast in poorly injected areas.

关键词： Digital filters Filtering Image analysis Algorithm design and analysis Biomedical imaging X-ray imaging Angiography Protocols Optical imaging Noise reduction

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：