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International Conference on Innovations in Information Technology

作者： Ervin Varga Imre Lendak Milan Gavrić Aleksandar Erdeljan Department of power electronics and communication engineering Novi Sad Serbia Computing and control Department Novi Sad Serbia CIM & GIS group Telvent DMS Limited Liability Company Novi Sad Serbia

This paper shows the result of an analysis pertaining to the applicability of RESTful web services (RESTful WS) in solving various software and data integration scenarios in control centers for the electric power system domain. There are many possible ways to enhance power system software/data integration by combining RESTful WS and the IEC 61970 set of standards. The goal of this paper is to highlight those lines of integration in control centers, where the benefits of leveraging RESTful WS are most noticeable. The importance of selecting the most prominent integration scenarios from the viewpoint of RESTful WS stems from the fact, that not all integration problems are naturally fitted for RESTful WS. Assuming a type of RESTful WS, which wraps the resource oriented power system data model defined in the IEC 61970-301 Common Information Model (CIM) and the generic query interface defined in IEC 61970-403 Generic Data Access (GDA), the paper demonstrates that such a RESTful WS may be successfully utilized in many concrete integration situations. As an added advantage, a RESTful WS atop of existing IEC 61970 standards can significantly loose the couplings between different software packages used in power system control centers. We have realized several pilot projects using real life power system data models (some used in CIM interoperability tests) to assert the outcome of our feasibility study. This study clearly shows that RESTful web services are a powerful tool for solving numerous power system software and data integration problems in control centers.

关键词： Software Computer integrated manufacturing Web services Medical services Power systems IEC standards Geographic Information Systems

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A new tool for comparison and evaluation of medical images

A new tool for comparison and evaluation of medical images

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IEEE Symposium on Product Compliance engineering (PSES)

作者： Lucie Gráfová Jan Hořejš Aleš Procházka Magdaléna Kašparová Taťjana Dostálová Department of Computing and Control Engineering Institute of Chemical Technology Prague Prague Czech Republic Department of Paediatric Stomatology 2nd Medical Faculty Charles University Prague Prague Czech Republic

A new tool has been developed for comparison and evaluation of medical images based on image registration and edge detection algorithms. The tool performance has been demonstrated on the processing of the ortopantomograms taken before and after treatment. The accuracy of the performance has been discussed and the possible origins of tool performance errors have been explained. The results obtained using presented tool have been discussed by an expert. The expert has confirmed that the tool is well suited for comparison and evaluation of ortopantomograms. The expert has come to the conclusion that our tool can be useful in other specializations of dentistry, not only in orthodontics.

关键词： Accuracy Medical diagnostic imaging Image registration Image edge detection Presses Mutual information

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A new tool for comparison and evaluation of medical images

A new tool for comparison and evaluation of medical images

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IEEE International Symposium on Intelligent Signal Processing

关键词： Accuracy Medical diagnostic imaging Image registration Image edge detection Presses Mutual information

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Combining ensemble technique of support vector machines with the optimal kernel method for hyperspectral image classification

Combining ensemble technique of support vector machines with...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Bor-Chen Kuo I-Ling Chen Cheng-Hsuan Li Chih-Cheng Hung Graduate Institute of Educational Measurement and Statistics National Taichung University of Education Taichung Taiwan Department of Electrical and Control Engineering National Chiao Tung University Hsinchu Taiwan School of Computing and Software Engineering Southern Polytechnic State University GA USA

In remote sensing researches, the curse of dimensionality is one greatly difficult classification problem. Many studies have demonstrated that multiple classifier systems, such as the random subspace method (RSM), can alleviate small sample size and high dimensionality concern and obtain more outstanding and robust results than a single classifier on extensive pattern recognition issues. A dynamic subspace method (DSM) was proposed for constructing component classifiers with adaptive subspaces to adjust the shortcomings of RSM based on re substitution accuracy by applying each classifier. However, the performances of SVMs are based on choosing the proper kernel functions or proper parameters of a kernel function. The objective of this research is to develop a novel ensemble technique based on support vector machines (SVMs) via the optimal kernel method, and propose a novel subspace selection mechanism, named the kernel-based dynamic subspace method (KDSM), to improve DSM on automatically determining dimensionality and selecting component dimensions for diverse subspaces. Experimental results show a sound performance of classification on the famous hyperspectral images, Washington DC Mall.

关键词： Kernel Support vector machines Nickel Hyperspectral imaging Training Accuracy

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Cloth Animation Based on Particle Model with Constraint

Cloth Animation Based on Particle Model with Constraint

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Workshop on Digital Media and Digital Content Management (DMDCM)

作者： Shi Min Mao Tianlu School of Control and Computer Engineering North China Electric Power University Beijing China Graduate School Chinese Academy and Sciences Beijing China Institute of Computing Technology Chinese Academy and Sciences Beijing China

Physically-based methods are often used to simulate cloth animation. For generating realistic cloth animation, stability and effectiveness are two most important aspects which need to be considered. In cloth animation, the users often need to attach a vertex to make sure the vertex is free collision or reduce the excessive elongation of some edges. Some existing methods directly adjust the particle position or use stiff spring model for the simulation regarding these facts. However, these methods can cause energy loss or system performance degradation. In this paper, we propose a novel method to simulate cloth based on physically-model with constraints. Cloth deformation is solved using a physically-based model, and then constraints are iteratively imposed to avoid over-elongation and penetration. The experiments show that our method is stable and effective, and can generate realistic cloth animations.

关键词： Animation Computational modeling Springs Force Mathematical model Deformable models Damping

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A graph description and analysis framework of liver vascular system

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Journal of Computational Information Systems 2011年第6期7卷 1998-2005页

作者： Chen, Yufei Drechsler, Klaus Laura, Cristina Oyarzun Zhao, Weidong Liu, Yanli Post-doctoral Research Center of Control Science and Engineering Tongji University Shanghai 200092 China Research Center of CAD Tongji University Shanghai 200092 China Fraunhofer Institute for Computer Graphics Research Cognitive Computing and Medical Imaging 64283 Darmstadt Germany

Accurate description and analysis of liver vascular system is critical in diagnosis and treatment of liver diseases. Even though there are plenty of researches put their efforts on the acquisition of optimal visual information in liver vascular system, quite a few studies focus on the quantitatively geometrical and structural analysis on them. In this paper, we proposed a graph description and analysis framework for liver vascular structure representation. First of all, the vessels were enhanced through Hessian eigenvalue calculation in order to be conveniently segmented from the liver image. Secondly, a three dimensional thinning based skeletonization method was applied on the vessel image to obtain the topological structure of the liver vessels. The skeleton result was then represented as a graph, followed by the geometrical attributes computation. Finally, the graph was efficiently pruned to form a directed acyclic vascular tree without redundant and irrelevant branches based on a flow conservation approach. The experiments on liver CT datasets show that the proposed framework can effectively obtain the liver vascular structure and its quantitative description. Copyright © 2011 Binary Information Press.

关键词： Three dimensional computer graphics

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Preface

2012 IEEE Conference on Evolving and Adaptive Intelligent Sy...

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2012 IEEE Conference on Evolving and Adaptive Intelligent Systems, EAIS 2012 - Proceedings 2012年 iii-iv页

作者： Angelov, Plamen Filev, Dimitar Kasabov, Nik Iglesias, José Antonio Communication Systems Department InfoLab21 Lancaster University Lancaster LA1 4WA United Kingdom Intelligent Control and Infonnation Systems Ford Research and Advanced Engineering 2101 Village Road MD #1437 Dearborn MI 48121 United States Knowledge Engineering and Discovery Research Institute School of Computing and Infonnatics Sciences Auckland University of Technology 581 Great South Rd 1020 Auckland New Zealand Carlos III University of Madrid Avda. Universidad 30 28911 Leganes Spain

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Analysis and suppression of noise in astronomical video

Analysis and suppression of noise in astronomical video

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International Conference on Radioelektronika

作者： Jan Švihlík Karel Fliegel Pavel Koten Eva Jerhotová Stanislav Vítek Petr Páta Department of Computing and Control Engineering Institute of Chemical Technology Prague Praque Czech Republic Department of Radioelectronics Czech Technical University Praque Czech Republic Interplanetary Matter Department Astronomical Institute of the CAS Ondrejov Czech Republic

This paper is devoted to noise suppression in systems for double station observation of meteors, nowadays known as MAIA (Meteor Automatic Imager and Analyzer). The noise analysis based on acquisition of testing video sequences at different lighting conditions and their statistical evaluation were described in our previous paper. The measurement showed that the type of noise generated by the system is signal-independent in a certain illumination range. The noise and image models in the wavelet domain are based on the Generalized Laplacian Model (GLM) and it is the most convenient to estimate the model parameters using the moment method. Furthermore, the noise component may be modeled by the GLM also in the space domain. Overall, we verified that the GLM allows for modeling various types of probability density functions. In the final section of this paper, the performance of the proposed advanced de-noising algorithm is verified on the real data, which were acquired in the Astronomical Institute.

关键词： Noise Discrete wavelet transforms Noise reduction Lighting Histograms Imaging

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Stabilization of networked control systems with nonuniform random sampling periods

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International Journal of Robust and Nonlinear control 2011年第5期21卷 501-526页

作者： Yang, Hongjiu Xia, Yuanqing Shi, Peng Department of Automatic Control Beijing Institute of Technology Beijing 100081 China Department of Computing and Mathematical Sciences University of Glamorgan Pontypridd CF37 1DL United Kingdom School of Engineering and Science Victoria University Melbourne VIC 8001 Australia

In this paper, a new linear delayed delta operator switched system model is proposed to describe networked control systems with packets dropout and network-induced delays. The plant is a continuous-time system, which is sampled by time-varying random sampling periods. A general delta domain Lyapunov stability criterion is given for delta operator switched systems with time delays. Sufficient conditions for asymptotic stability of closed-loop networked control systems with both packets dropout and network-induced delays are presented in terms of linear matrix inequalities (LMIs). A verification theorem is given to show the solvability of the stabilization conditions by solving a class of finite LMIs. Both the case of data packets arrive instantly and the case of invariant sampling periods in delta operator systems are given, respectively. Three numerical examples are given to illustrate the effectiveness and potential of the developed techniques. © 2010 John Wiley & Sons, Ltd.

关键词： Stabilization

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Robust Anti-windup Compensator Synthesis via Integral Quadratic Constraints

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IFAC Proceedings Volumes 2011年第1期44卷 14477-14482页

作者： G. Li W.P. Heath G. Herrmann School of Engineering Computing and Mathematics University of Exeter North Park Road Exeter UK EX4 4QF Control Systems Centre School of Electrical and Electronic Engineering University of Manchester Sackville Street Building Manchester M13 9PL UK ACTLab Department of Mechanical Engineering University of Bristol Queens Building University Walk Bristol BS8 1TR UK

Abstract We develop an anti-windup (AW) compensator synthesis approach using Integral Quadratic Constraints (IQC). The synthesis finds the AW compensator that achieves a specified robustness against additive or input multiplicative uncertainty, provided there exists a feasible solution. We also incorporate a performance criterion into the AW compensator synthesis to achieve an appropriate trade-off between the performance and robustness. The efficacy of this approach is demonstrated by a numerical example.

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