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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Zbigniew Emirsajłow Anna Krakowiak Adam Kowalewski Jan Sokołowski Institute of Control Engineering West Pomeranian University of Technology Szczecin Poland Institute of Mathematics Technical University Cracow Cracow Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics Institute of Automatics AGH University of Science and Technology Cracow Poland Systems Research Institute Polish Academy of Sciences Warszawa Poland Institut Elie Cartan Laboratoire de Mathématiques Université Henri Poincaré Vandoeuvre-les-Nancy France

In the paper the first order sensitivity analysis is performed for a class of optimal control problems for time delay parabolic-hyperbolic equations. A singular perturbation of geometrical domain of integration is introduced in the form of a circular hole. The Steklov-Poincaré operator on a circle is defined in order to reduce the problem to regular perturbations in the truncated domain. The optimality system is differentiated with respect to the small parameter and the directional derivative of the optimal control is obtained as a solution to an auxiliary optimal control problem.

关键词： Optimal control Equations Delay effects Sensitivity analysis Boundary conditions Educational institutions Electronic mail

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Developing a denoising filter for electron microscopy and tomography data in the cloud

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Biophysical Reviews 2012年第3期4卷 223-229页

作者： Starosolski, Zbigniew Szczepanski, Marek Wahle, Manuel Rusu, Mirabela Wriggers, Willy Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology 44-100 Gliwice Akademicka 16 Poland School of Biomedical Informatics University of Texas Health Science Center Houston TX 77030 7000 Fannin St. UCT 600 United States Department of Pediatric Radiology Texas Children's Hospital Houston TX 77030 6621 Fannin St. United States Department of Biomedical Engineering Rutgers The State University of New Jersey Piscataway NJ 08854 599 Taylor Road United States Department of Physiology and Biophysics and Institute for Computational Biomedicine Weill Medical College of Cornell University NY NY 10065 1300 York Ave. United States D. E. Shaw Research NY NY 10036 120 West 45th Street United States

The low radiation conditions and the predominantly phase-object image formation of cryo-electron microscopy (cryo-EM) result in extremely high noise levels and low contrast in the recorded micrographs. The process of single particle or tomographic 3D reconstruction does not completely eliminate this noise and is even capable of introducing new sources of noise during alignment or when correcting for instrument parameters. The recently developed Digital Paths Supervised Variance (DPSV) denoising filter uses local variance information to control regional noise in a robust and adaptive manner. The performance of the DPSV filter was evaluated in this review qualitatively and quantitatively using simulated and experimental data from cryo-EM and tomography in two and three dimensions. We also assessed the benefit of filtering experimental reconstructions for visualization purposes and for enhancing the accuracy of feature detection. The DPSV filter eliminates high-frequency noise artifacts (density gaps), which would normally preclude the accurate segmentation of tomography reconstructions or the detection of alpha-helices in single-particle reconstructions. This collaborative software development project was carried out entirely by virtual interactions among the authors using publicly available development and file sharing tools. © 2012 International Union for Pure and Applied Biophysics (IUPAB) and Springer.

关键词： cryo-EM Digital paths Filtering Helix detection Remote collaboration Supervised classification

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Composition of united multiple diseases evolution topological model

Composition of united multiple diseases evolution topologica...

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9th International Symposium on Intelligent Systems and Informatics, SISY 2011

作者： Karpičs, I. Markovičs, Z. Markoviča, I. Institute of Computer Control Automation and Computer Engineering Faculty of Computer Science and Information Technology Riga Technical University Riga Latvia

ISBN: (纸本)9781457719745

Mathematical models are constructed and used as a methodology of various functioning systems structure investigation and performance analysis. The main goal of mathematical model usage is to perform wholesome diagnostics and correct work resumption of investigated system. In the article topological modeling method has been investigated by giving fundamental basics and application spheres by examples. Authors propose model construction method with an example from medicine by creating multiple diseases (arterial hypertension, atherosclerosis and diabetes mellitus) evolution topological model with formal aspects. Developed modeling method and united diseases model can be used to prognosticate evolution of diseases, perform inspection of used therapies and provide information for optimal therapy complex selection. © 2011 IEEE.

关键词： Topology

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A simulation system for training telerobotic spine surgery

A simulation system for training telerobotic spine surgery

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作者： Xie, Yongming Pheng, Ann Heng Jishuai, Zhang Liu, Ping Zhu, Tanchao Li, Jianying Department of Computer Science and Engineering Chinese University of Hong Kong Hong Kong Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China

ISBN: (纸本)9781424480395

Spine surgery is a complex operation requiring extensive experience and highly accurate manipulations of instruments. Traditional methods like practice in operating room have major drawbacks such as high risk and rare chance for which virtual reality (VR) and computer technologies can offer solutions. The development and prevalence of the Da Vinci system has greatly helped surgeons and interns, which shortens the steep learning curve of complex surgery procedures. In this paper, a virtual reality simulation system of telerobotic surgery was proposed for training spine surgery. A master-slave control structure similar to the da Vinci system based on haptic devices was completed. Combining 3D display devices and haptic devices, a prototype of a telerobotic surgical simulation system was implemented. With the virtual surgery interface and environment, operators could work in a high immersive simulated tele-surgical environment to develop basic skills needed in telerobotic spine surgery. © 2011 IEEE.

关键词： Virtual reality

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Current Status and Future Perspective of Waste Printed Circuit Boards Recycling

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Procedia Environmental sciences 2012年 16卷 590-597页

作者： Xianlai Zeng Lixia Zheng Henghua Xie Bin Lu Kai Xia Kuoming Chao Weidong Li Jianxin Yang Szuyin Lin Jinhui Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 10084 China Dongjiang Environmental Company Limited Shenzhen 518057 China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology Wuhan 430074 Hubei China Faculty of Engineering and Computing Coventry University Coventry CV1 5FB UK Institute of Information Management National Chiao Tung University Hsinchu 300 Taiwan

For waste electrical and electronic equipment (WEEE), large quantities of waste printed circuit boards (PCBs) are released into environment. In light of their characteristics including complex structures, high metals content and potential hazards, waste PCBs are regarded as the most difficult parts of WEEE to be recycled. Therefore in recent ten years, the issue has attracted much attention from researchers and enterprises. This article reviews the latest processes of waste PCBs developed from laboratories to pilot engineering applications, and presents the most suitable available technology for waste PCBs, typically categorized as manually dismantling and automatic approaches in developing and developed countries, respectively. Towards achieving the better sustainability and recyclability for waste PCBs, nonmetal powder and precious metals should be developed for a deep recovery following mechanical treatment. Additionally, a significant shift is emerging from dismantling for recycling of printed wiring boards, to disassembling for remanufacturing of electronic components, which will indicate that a new paradigm of reclaiming waste PCBs is shaping.

关键词： Printed circuit boards (PCBs) Waste electrical and electronic equipment (WEEE) Recycling Best available technology trends

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Intelligent diagnostics of devices with the use of infrared mapping images

Intelligent diagnostics of devices with the use of infrared ...

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2011 3rd International Students Conference on Electrodynamics and Mechatronics, SCE III

作者： Gasz, R. Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology 45-272 Opole Poland

ISBN: (纸本)9781424496952

A correct diagnostics together with the early prediction of failure or malfunction of the system are the major issues in modern maintenance. Nowadays, the time-honored diagnostics may be inadequate and lead to omitting failures, resulting in higher costs of repairing damaged equipment. That is why the interest in intelligent diagnostics increases due to the possibility of better interpretation of the component status and early failure prediction. One of the ways of determining the device condition is to measure and analyze the temperature of multiple points on the device. Thermographics may show a beginning of significant wear of a component, and enable a repair or replacing before the failure appears. The paper presents the key aspects of the diagnostics with thermal images, including: technology mapping, mapping algorithms, together with a presentation of available software solutions. © 2011 IEEE.

关键词： Repair

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Gradient-based classification and representation of features from volume data

Gradient-based classification and representation of features...

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15th International Conference on System Theory, control and Computing, ICSTCC 2011

作者： Gavrilescu, Marius Manta, Vasile Gröller, Eduard Technical University Iasi Romania Vienna University of Technology Austria Faculty of Automatic Engineering and Computer Control Romania Department of Computer Science University of Bergen Norway

ISBN: (纸本)9781457711732

The extraction and representation of information from volume data are important research avenues in computer-based visualization. The interpretation of three- or multi-dimensional data from various scanning devices is important to medical imaging, diagnosis and treatment, reliability and sustainability analyses in various industrial branches, and, in more general terms, information visualization. In this paper, we present several approaches for the classification and representation of relevant information from volume data sets. The techniques are based on the gradient vector, a property directly derived from the original volume data. We show how this property can be computed and subsequently used for classification through gradient-based one- and multi-dimensional transfer functions, as well as for the enhancement of surface features. The described techniques are illustrated through images generated using our volume rendering framework, from Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) data sets. The resulting images show how gradient-based techniques are suited for improved volume classification and the better extraction of meaningful information. © 2011 faculty of Auto control.

关键词： Extraction

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Neighborhood discriminant nearest feature line analysis for face recognition

Neighborhood discriminant nearest feature line analysis for ...

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2011 2nd International Conference on Innovations in Bio-inspired Computing and Applications, IBICA 2011

作者： Yan, Lijun Pan, Jeng-Shyang Chu, Shu-Chuan Roddick, John F. Department of Automatic Test and Control Harbin Institute of Technology Harbin China Department of Computer Science Harbin Institute of Technology Shenzhen Graduate School Shenzhen China School of Computer Science Engineering and Mathematics Flinders University of South Australia Australia

ISBN: (纸本)9781457712197

A novel subspace learning algorithm named neighborhood discriminant nearest feature line analysis (NDNFLA) is proposed in this paper. NDNFLA aims to find the discriminant feature of samples by maximizing the between-class feature line (FL) distances and minimizing the within-class FL distance. At the same time, theneighborhood is preserved in the feature space. Experimental results demonstrate the efficiency of the proposed algorithm. © 2011 IEEE.

关键词： Face recognition

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Comparative analysis of adjusted acoustic pressure level of fan coolers mounted on electric power transformers with on load tap changers

Comparative analysis of adjusted acoustic pressure level of ...

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40th International Congress and Exposition on Noise control engineering 2011, INTER-NOISE 2011

作者： Borucki, Sebastian Boczar, Tomasz Cichoń, Andrzej Zmarzly, Dariusz Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology ul. Proszkowska 76 Opole 45-758 Poland

ISBN: (纸本)9781618392800

Based on literature review and measurements performed on electric power stations which considered adjusted acoustic pressure level, generated during operation of high power transformer units with integrated on load tap changers, it can be stated that the main factors having influence on noise emission to surroundings are columns of fan coolers (cooling apparatus). The subject area presented in the paper considers measurements and value estimation of the adjusted acoustic pressure level occurring around cooler columns with two or three funs. The technical verification and comparative analysis were performed during factory tests. Paper includes determined values of noise generated during operation of fan coolers according to the rotational speed of the fan systems, distance from the (cooler) source by nominal rotational speed value and by height variation of the measuring position on the vertical symmetry axis of the investigated device. The main aim of works performed was estimation of the influence of the rotational speed of fans applied on the emitted to surroundings adjusted acoustic pressure level as well as comparative analysis of noise released to environment according to number of funs (a column with two and three funs). Copyright © (2011) by the Institute of Noise control engineering.

关键词： Power transformers

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Direct contour error compensation for biaxial contouring control systems based on a global fixed coordinate frame

Direct contour error compensation for biaxial contouring con...

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作者： Yang, Jiangzhao Li, Zexiang Wang, Hong Lou, Yunjiang Long, Zhili Division of Control and Mechatronics Engineering Shenzhen Graduate School Harbin Institute of Technology Xi Li Shenzhen 518055 China Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong

ISBN: (纸本)9781612847009

In the tasks of contour following, two important issues are required to be concerned. They are the real-time contour error estimation and compensation. Recent research shows that the accuracy of real-time contour error estimation can be improved by the approach of circular approximation. However, in such an approach, the estimated contour error is calculated from the artificial moving coordinate frame and has to be transformed back to the fixed coordinate frame for compensation. In this paper, an approach to estimate and compensate the real-time contour error based on the global fixed coordinate frame is proposed. In this method, the real-time contour error can be obtained from the tracking error decomposition to the global fixed coordinate frame via a projection map. Based on this estimation, direct contour error compensation will be performed with respect to the global fixed coordinate frame through modifying the reference position inputs. Experiments show that the estimation accuracy of the direct tracking error decomposition is the same as that of the circular estimation and the tracking performance of the contouring system is evidently improved after the compensation. © 2011 IEEE.

关键词： Error compensation

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