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4th IFAC Workshop Automatic Systems for Building the Infrastructure in Developing Countries, DECOM-TT 2004

作者： Dimirovski, Georgi M. Dinibütün, A. Talha Vukobratovic, Miomir K. Zhao, J. Faculty of Electrical Engineering MK-1000 Skopje SS Cyril and Methodius University Macedonia Computer Engineering Department Faculty of Engineering Acibadem Dogus University Zeamet Sk. 21 Kadikoy IstanbulTR-34722 Turkey Centre of Robotics and Flexible Automation Institute Mihailo Pupin Belgrade11000 Serbia School of Information Science and Engineering Institute of Control Theory Northeastern University Shenyang Liaoning110004 China

A systems re-engineering technique to integrated control and supervision for applications to industrial multi-zone furnaces has been elaborated by using known theories on generalized predictive control and nonlinear programming. This paper presents the derivation of optimizing equations and inequalities. The design is based on the use of general predictive control to provide optimized set-points under the presumption a well designed regulatory control was implemented at the executive level. Digital implementation of control functions are sought within standard computer process control platform for practical engineering and maintenance reasons. Copyright © 2004 IFAC.

关键词： Integrated control

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Verification of multiple input/multiple output business processes

Verification of multiple input/multiple output business proc...

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IEEE International Conference on Information Reuse and Integration (IRI)

作者： C. Badica C. Fox Faculty of Automation Computers and Electronics Software Engineering Department University of Craiova Craiova Romania Department of Computer Science University of Essex Colchester UK

In many business process modelling situations using Petri nets, the resulting model does not have a single input place and a single output place. Therefore, the correctness of the model cannot be assessed within the existing frameworks, which are devised for workflow nets - a particular class of Petri nets with a single input place and a single output place. Moreover, the existing approaches for tackling this problem are rather simplistic and they do not work even for simple examples. This paper shows that, by an appropriate reduction of a multiple input/multiple output Petri net, it is possible to use the existing techniques to check the correctness of the original process. The approach is demonstrated with an appropriate example.

关键词： Petri nets automation computer science Software engineering Business process re-engineering Job production systems Virtual manufacturing Information technology Technology management Management information systems

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Restricted-domain Chinese automatic question-answering system based on question sentence similarity

Restricted-domain Chinese automatic question-answering syste...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Zheng-Tao Yu Xiao-Zhong Fan Peng-Cheng Ji The Faculty of Information Engineering and Automation Kunming University of Science and Technology Kunming P.R. China Department of Computer Science & Engineering Beijing Institute of Technology Beijing P.R.China

ISBN: (纸本)0780384032

It is an available pattern to implement auto answer in RDAQAS (restricted-domain automatic question-answering system) through calculating the similarity of target question sentences and question sentences in question sentences corpus, and then finding the most similar question sentences, and retrieving the answer finally and all these are based on HowNet and domain ontology. This paper introduces the building of financial domain ontology and question sentences corpus, then proposes the method to calculate similarity of question sentences based on keyword vector space method and semantic concept vector space method. The procedure of realization is described in details. The learning algorithm and learning course of getting question sentence semantic vectors based on the maximum entropy model are also introduced in detail. Finally, the experimental comparing data illustrates that the similarity calculation method based on the semantic concept is more superior to that based on the keyword.

关键词： Ontologies Dictionaries Information retrieval Entropy Databases Finance computer science automation Data mining Content based retrieval

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A novel approach to pneumatic position servo control of a glass wall cleaning robot

A novel approach to pneumatic position servo control of a gl...

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IEEE International Workshop on Intelligent Robots and Systems (IROS)

作者： Houxiang Zhang Jianwei Zhang Rong Liu Guanghua Zong Department TAMS Faculty of Computer Science University of Hamburg Hamburg Germany Robotics Institute School of Mechanical Engineering and Automation BeiHang University Beijing China

Taking Shanghai science and Technology Museum as the operation target, the robot named skycleaner which is totally actuated by pneumatic cylinders and is sucked to the glass walls with vacuum suckers is presented. In order to solve the problems of lower stiffness and the nonlinear movement characteristic of the pneumatic system, a method of segment and variable bang-bang controller is proposed to implement the accurate control of the position servo system using the principle of pneumatic pulse width-modulation (PWM). Testing results show that the controller can effectively improve the control quality. This implies that the method can meet the requirements of realization.

关键词： Servosystems Glass Cleaning Robots Nonlinear control systems Control systems Pulse width modulation Vacuum technology Pneumatic systems Servomechanisms

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Interaction Balance Method for Large-scale Industrial Processes With Fuzzy Constraints 1

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IFAC Proceedings Volumes 2004年第11期37卷 423-428页

作者： Jia-Chen GU Bai-Wu WAN Xiao-E RUAN Automation Research and Design Institute of Metallurgical industry Beijing P R China Systems Engineering Institute State Key Laboratory for Manufacturing Systems Engineering Xi ‘an Jiaotong University Xi'an R R China Dept.of Electrical Engineering & Computer Science Korea Advanced Institute of Science and Technology Daejeon Korea Faculty of Science Xi'an Jiaotong University Xi'an P.R.China

The interaction balance method (IBM) with fuzzy constraints is proposed for large-scale industrial processes under hierarchical steady-state optimization with the consideration of the model-reality difference and the constraints of subprocesses being flexible. In this approach, the models that are treated as equality constraints and the inequality constraints of the subprocesses are all fuzzified. Two cases of interaction balance method are studied: the open-loop IBM and the IBM with global feedback. Simulation results show that the solutions of the proposed method with global feedback are very close to the optimal solutions of the real process.

关键词： Fuzzy models large-scale systems coordination constraints hierarchical control

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Transient stability fuzzy control approach for power systems

Transient stability fuzzy control approach for power systems

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IEEE International Conference on Industrial Technology (ICIT)

作者： T. Guesmi H.H. Adballah A. Toumi Faculty of Automation Guangdong University of Technology Guangzhou Guangdong China Institute of Computer Science at FORTH Crete Heraklion Greece Faculty of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan Hubei China N. Papanikolaou & Associates STEP-C FORTH Crete Heraklion Greece

Power system angle stability can be improved by a wide variety of controls. Some methods have been used effectively for many years, both at generating plants and in transmission network. In this paper, two methods are proposed to improve control stability. The first consists to find the critical clearing time (CCT) by equal area stability criterion and numerical integration. The second interests to fuzzy logic controllers. For this last method, we present the nonlinear model with a Takagi-Sugeno fuzzy model. Then a model-based in fuzzy controller design utilizing the concept of the so-called "parallel distributed compensation" (PDC) is employed. Stability analysis and control design problems can be reduced to linear matrix inequality (LMI) problems. Therefore, they can be solved efficiently in practice by convex programming techniques for LMI's. A single machine infinite bus system is analysed with the proposed methods.

关键词： Power system transients Power system stability Fuzzy control Power system control Power systems Control systems Stability criteria Numerical stability Fuzzy logic Takagi-Sugeno model

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New Trend in Control of Steady-state Large-scale Systems *

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IFAC Proceedings Volumes 2004年第11期37卷 455-460页

作者： Bai-Wu WAN Ding LIU Xiaoe RUAN Institute of Systems Engineering State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University P.R. China School of Automation Xi'an University of Technology P.R.China Dept. of Electrical Engineering & Computer Science Korea Advanced Institute of Science and Technology 373-7 Guseong-dong Yuseong-gu Daejeon 305-701 Korea Faculty of Science Xi'an Jiaotong University P.R.China

This paper reviews what the first Author and his Group have been investigating for the past decade in the on-line steady-state hierarchical intelligent control and optimization of large-scale industrial processes (LSIP), as well as large-scale systems (LSS). The techniques include the use of neural networks for identification and optimization, the use of expert systems to solve some kinds of hierarchical multi-objective optimization problems, the use of the fuzzy logic control and the use of the iterative learning control. In addition, several implementation examples and the product quality control for LSS are introduced. Finally the paper prospects the new stages of development.

关键词： Large-scale systems industrial control intelligent control optimization quality control

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Optimizing Supervision and Control for Industrial Furnaces: Predictive Control Based Design

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IFAC Proceedings Volumes 2004年第19期37卷 17-28页

作者： Georgi M. Dimirovski A. Talha Dinibütün Miomir K. Vukobratovic J. Zhao SS Cyril and Methodius University Faculty of Electrical Engineering MK-1000 Skopje Republic of Macedonia Dogus University Computer Engineering Department Faculty of Engineering Acibadem Zeamet Sk. 21 Kadikoy TR-34722 Istanbul Turkey Institute “Mihailo Pupin” Centre of Robotics and Flexible Automation 11000 Belgrade Serbia and Montenegro Northeastern University School of Information Science and Engineering Institute of Control Theory Shenyang Liaoning 110004 P.R. of China

关键词： Complex time-delay processes generalized predictive control integrated control and supervision optimization set-point control

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Multi-stage modeling In early phases of design 14

Multi-stage modeling In early phases of design

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14th International Conference on engineering Design, ICED 2003

作者： Brix, Torsten Döring, Ulf Reeßing, Michael Faculty of Mechanical Engineering Engineering Design Group Technical University of Ilmenau PO Box 100565 Ilmenau98684 Germany Faculty of Computer Science and Automation Computer Graphics Group Technical University of Ilmenau PO Box 100565 Ilmenau98684 Germany

ISBN: (纸本)1904670008

In early design phases three main levels of abstraction (the function, the principle and the embodiment design) can be distinguished, which describe results of the synthesis process. Suitable representations exist for these three levels of abstraction. For a continuous computeraided product design a phase overlapping multi-stage modeling is necessary, which connects the different abstraction levels and the according representations. The aim of the paper is the presentation of a concept for multi-stage modeling and first results of an according software implementation, which supports an iterative design. The described approach is restricted to conceptual design and to the first steps in embodiment design of mechanisms and gears.

关键词： Conceptual design

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Wavelet transform for image analysis

Wavelet transform for image analysis

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IEEE-Siberian Conference on Control and Communications, SIBCON 2003

作者： Skorpil, V. Stastny, J. Brno University of Technology Faculty of Electrical Engineering and Communication Department of Telecommunications Purkynova 118 Brno612 00 Czech Republic Brno University of Technology Faculty of Mechanical Engineering Institute of Automation and Computer Science Technicka 2 Brno616 69 Czech Republic

ISBN: (纸本)0780378547

The wavelet transform is a comparatively new and fast developing method for analysing signals. The main advantage of applying the wavelet transform to the detection of edges in an image is the possibility of choosing the size of the details that are detected. The size of detected edges is set by the wavelet scale. In the case of the discrete wavelet transform the choice of the scale is performed by multiple signal passage through the wavelet filter. When processing a 2-D image, the wavelet analysis is performed separately for the horizontal and the vertical function. The vertical and the horizontal edges are thus detected separately. The wavelet transform splits the input signal into two components. One contains the low-frequency (LP) part of input signal, which corresponds to major changes in the function (individual objects in the image, etc.). The other part contains the high-frequency (HP) part of input signal, which corresponds to details in the function (noise, edges, etc.). This signal component is not processed on the next level of transformation. © 2003 IEEE.

关键词： Signal analysis

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