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15th International Symposium on Artificial Life and Robotics, AROB '10

作者： Wang, Bei Sugi, Takenao Wang, Xingyu Shirakawa, Shuichiro Nakamura, Masatoshi Department of Automation East China University of Science and Techonology Shanghai China Department of Electrical and Electronic Engineering Saga University Saga Japan National Centre of Neurology and Psychiatry Tokyo Japan Research Institute of Systems Control Institute for Advanced Research and Education Saga University Saga Japan

ISBN: (纸本)9784990288044

Short nap is a good relaxation way when people feel sleepy and tired during the day time. An automatic light sleep level estimation technique was presented for short nap sleep evaluation. Parameters were extracted from the polysommnographic sleep record. Sleep stages of open eyes awake, close eyes awake, and stage 1 were determined automatically based on the conditional probability. The conditional probability indicated the possibility of occurrence of sleep stages during short nap. The light sleep level was estimated based on the continuous change of conditional probability of awake. The developed technique can be usable for comfortable short nap sleep control. © 2010 ISAROB.

关键词： Probability

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Hybridization approach of plant models for enhancing ship electrical system analysis

Hybridization approach of plant models for enhancing ship el...

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Electrical systems for Aircraft, Railway and Ship Propulsion

作者： R. Iza E. Irigoyen V. Gómez F. Artaza H. Etxebeste INGETEAM MARINE Zamudio Spain System Engineering and Automation Department Control Intelligent Research Group University of Basque Country (UPV-EHU) Bilbao Spain System Engineering and Automation Dept. University of the Basque Country Bilbao Spain

This work presents a Hybrid Model Library (HML) for enhancing the analysis of ship electrical systems. Lots of studies were made in order to select the most appropriated software platform to test the new models developed. This work shows examples of models developed in Simulink-MATLAB and PSIM platforms. Later on, we present a research methodology based on modeling techniques by hybridization. Several modeling stages will be presented in order to clarify what kind of difficulties has been solved during marine plant models designing. Finally, we present some conclusions about the HML developed and the chances to improve its core.

关键词： Load modeling Analytical models Marine vehicles Libraries Propulsion Software control systems

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Fault Detection and Isolation Based on Optimal Fault-Tolerant Observers for Linear system

Fault Detection and Isolation Based on Optimal Fault-Toleran...

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International Conference on Electrical and control engineering (ICECE)

作者： Jianbo Yi Qi Huang Sichuan Provincial Key Laboratory of Power System Wide-Area Measurement and Control Department of automation University of Electronic Science and Technology Chengdu Sichuan China

The problem of diagnosing the actuator faults and sensor faults of linear system with the methods of fault detection and isolation (FDI) technology and optimal fault-tolerant observers is addressed. The measurable outputs used to reconstruct states for the system carry the fault information, which may affect the performance of the system state estimation. In this paper, by comparing the measurable outputs, reliable outputs without fault is selected as the input of the reconstructed system. Then reduced order optimal fault-tolerant observers are used to track the system states. Based on the FDI technology, residual observers are designed to achieve the fault detection for the linear system. Case studies demonstrate the effectiveness of FDI technology and optimal fault-tolerant observers method used in fault detection and isolation.

关键词： Observers Fault tolerance Fault tolerant systems Actuators Fault detection Linear systems Mathematical model

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The roles of small-world and degree heterogeneity on evolutionary behavior networks

The roles of small-world and degree heterogeneity on evoluti...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： Yang Yang Xiang Li Zhihai Rong Adaptive Networks and Control Laboratory Department of Electronic Engineering Fudan University Shanghai China Department of Automation Donghua Uinversity Shanghai China

This paper studies the roles of small-world and degree heterogeneity features on the behavioral diversity in a structured population. The findings conclude that the collective behaviors are prone to the much higher diversity in a homogeneous structure due to the small-world effect, yet they are affected little in a scale-free structure. And the degree heterogeneity promotes the behavioral diversity a little while the population structure is homogeneous, but inhibits diversity while it is scale-free. Our work may be helpful for better understanding the collective evolutionary dynamic behaviors in a homogeneous or scale-free structured population.

关键词： Genetic mutations Matrix converters Adaptive systems Programmable control Adaptive control automation Game theory Humans Complex networks Research and development

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Population-based extremal optimization algorithm for hot rolling scheduling problem

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Journal of Computational Information systems 2010年第7期6卷 2415-2422页

作者： Sun, Kai Yang, Genke Pan, Changchun School of Electronic Information and Control Engineering Shandong Institute of Light Industry Shandong China Department of Automation Shanghai Jiao Tong University Shanghai China

The paper presents a valid model and a solution method named population-based extremal optimization algorithm (PEOA) to solve the hot rolling scheduling problem (HRSP). Firstly, the problem is formulated as a prize-collecting vehicle problem (PCVRP), which considers two major requirements: (a) selecting a subset of slabs from manufacturing slabs to be processed;(b) determining the optimal production sequence under multiple constraints, such as sequence-dependant transition costs, non-execution penalties etc. Secondly, a new algorithm which combined the extremal optimization (EO) with population evolutionary technique is proposed to solve the problem. The proposed algorithm is applied to a set of real production data and the performance of the algorithm is evaluated by comparing the results with other algorithms such as EO, modified algorithm (MGA), etc. Comparing results indicate that this new algorithm is an effective and competitive approach for the HRSP. Copyright © 2010 Binary Information Press.

关键词： Evolutionary algorithms

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Striking Sound Extracting Based on Approximate Entropy

Striking Sound Extracting Based on Approximate Entropy

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The 22nd China control and Decision Conference(2010年中国控制与决策会议)

作者： Zhihua Qiao Chuan Lin Zijuan Wang Automation College Shenyang Institute of areonautical Engineering Shenyang 110136 Electronic Information And Control Engineering Department of Guangxi University Of Technology Liuzh Shenyang Northeastern Automation Company Shenyang 110179

ISBN: (纸本)9781424451814;9781424451821

The extract accuracy of signal is vital to signal process, directly affects result of all next doing. To sound signal Approximate Entropy was taken as acoustics character to analyze sound signal got by experiment, and judging it’s start and stop point accurately, then extracting striking sound from original signal. It is proved by experiment result the aim of extracting striking signal is satisfied by the method and preferences.

关键词： Approximate Entropy (ApEn) striking sound environment noise threshold mode

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A multithread based new sparse matrix method in bioluminescence tomography

A multithread based new sparse matrix method in bioluminesce...

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Medical Imaging 2010 - Biomedical Applications in Molecular, Structural, and Functional Imaging

作者： Zhang, Bo Tian, Jie Liu, Dan Sun, Li Yang, Xin Han, Dong Sino-Dutch Biomedical and Information Engineering School of Northeastern University Shenyang 110004 China Medical Image Processing Group Institute of Automation Chinese Academy of Sciences P. O. Box 2728 Beijing 100190 China Department of Electronic Information and Control Engineering Beijing University of Technology China

ISBN: (纸本)9780819480279

Among many molecular imaging modalities, bioluminescence tomography (BLT) stands out as an effective approach for in vivo imaging because of its noninvasive molecular and cellular level detection ability, high sensitivity and low cost in comparison with other imaging technologies. However, there exists the case that large scale problem with large number of points and elements in the structure of mesh standing for the small animal or phantom. And the large scale problem's system matrix generated by the diffuse approximation (DA) model using finite element method (FEM) is large. So there wouldn't be enough random access memory (RAM) for the program and the related inverse problem couldn't be solved. Considering the sparse property of the BLT system matrix, we've developed a new sparse matrix (ZSM) to overcome the problem. And the related algorithms have all been speeded up by multi-thread technologies. Then the inverse problem is solved by Tikhonov regularization method in adaptive finite element (AFE) framework. Finally, the performance of this method is tested on a heterogeneous phantom and the boundary data is obtained through Monte Carlo simulation. During the process of solving the forward model, the ZSM can save more processing time and memory space than the usual way, such as those not using sparse matrix and those using Triples or Cross Linked sparse matrix. Numerical experiments have shown when more CPU cores are used, the processing speed is increased. By incorporating ZSM, BLT can be applied to large scale problems with large system matrix. © 2010 Copyright SPIE - The International Society for Optical engineering.

关键词： Phantoms

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Effects of interfacial pressure on tracking failure at XLPE cable joint by analyzing discharge light distribution

Effects of interfacial pressure on tracking failure at XLPE ...

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IEEE International Conference on Solid Dielectrics (ICSD)

作者： B. X. Du L. Gu Key Laboratory of Power System Simulation and Control of Ministry of Education Department of Electrical Engineering School of Electrical Engineering and Automation Tianjin University TJU Tianjin China

This paper investigated the effects of interfacial pressure on the discharge and tracking failure at the interface between XLPE and silicon rubber by analyzing the distribution of discharge light emitted during the failure process. The test sample was made by pressing together a piece of XLPE and a piece of transparent silicon rubber with the pressure of 20 kN/cm 2 , 100 kN/cm 2 and 300 kN/cm 2 , respectively. Test voltage was applied to a pair of plate-needle electrodes sandwiched at the interface with the insulation distance of 10 mm. The initial discharge voltage, the discharge light from discharge to tracking failure and the tracking patterns after failure were recorded with a digital camera. Then the discharge light was analyzed with an image processing method. Results show that the initial discharge voltage increases with the increase of pressure, which significantly influences the distribution characteristics of the discharge light and tracking pattern at the interface. The analysis of discharge light distribution is helpful in understanding the failure process and its mechanism at the interface between XLPE and silicon rubber found in prefabricated cable joint.

关键词： Discharges Insulation life Degradation Brightness Power cables Rubber Silicon

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Effect of temperature on electrical tree in silicone rubber

Effect of temperature on electrical tree in silicone rubber

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IEEE International Conference on Solid Dielectrics (ICSD)

作者： B. X. Du Z. L. May Gao T. Han Key Laboratory of Power System Simulation and Control of Ministry of Education Department of Electrical Engineering School of Electrical Engineering and Automation Tianjin University TJU Tianjin China

In this paper, room temperature vulcanized (RTV) silicone rubber (SiR) was employed as test sample to investigate the relationship between electrical tree propagation characteristics and the experiment temperature. Both the structures and growth characteristics of electrical tree in SiR were observed by using a digital camera and a microscope system. Obtained results show that electrical tree in RTV SiR is white gap tree channel, which all initiate from single branch, and the width of initiative single branch channel varies a lot with the electrical tree structure. The structure of electrical tree at experiment temperature from 30°C to 90°C in RTV SiR can be classified into four categories. They are branch, bush, pine branch and bush-pine mixed tree. The distribution of tree structures changes with the experiment. At the temperature of 30°C, branch tree take up a great proportion, however, bush tree becomes the dominant structure when the temperature rise up to 60°C and 90°C. The probability of tree initiation decreases obviously with the rise of the experiment temperature from 30°C to 90°C. All kinds of electrical tree grow rapidly in the first beginning of the treeing propagation, and this process lasts only a few minutes. In addition, a new parameter, the treeing proportion is introduced to describe propagation characteristics of bush tree.

关键词： Electrodes Rubber Temperature distribution Needles Power cables Cable insulation

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Application of nonlinear methods in tracking failure test of epoxy/SiO2 nanocomposite

Application of nonlinear methods in tracking failure test of...

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IEEE International Conference on Solid Dielectrics (ICSD)

作者： B. X. Du J. W. Zhang L. Gu H. J. Liu Key Laboratory of Power System Simulation and Control of Ministry of Education Department of Electrical Engineering School of Electrical Engineering and Automation Tianjin University TJU Tianjin China

This paper investigates the effect of nano-scale SiO 2 on the tracking failure properties of nanocomposites. Test samples were made by dispersing nano-scale SiO 2 powder in epoxy with the weight ratios of 0, 1, 3, 5, 7, 9 wt%. AC voltage was applied on a pair of needle-plate electrodes at the surface with the insulation distance of 10 mm. The time to tracking failure and discharge current were recorded. In order to distinguish the change of the tracking resistance from the confusing discharge current, a recurrence plot (RP) analysis of discharge current has been used. The patterns of the tracking failure were analyzed with fractal dimension (FD) method to quantify the carbonization degree. The results reveal that 3 wt% of nano-scale SiO 2 filler greatly increase the resistance to tracking failure of epoxy/SiO 2 nanocomposite.

关键词： Insulation life Degradation Discharges Surface discharges Surface treatment Loading Electrodes

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