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Feature extraction of light sleep state in polysomnogram by use of conditional probability

Feature extraction of light sleep state in polysomnogram by ...

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ICROS-SICE International Joint Conference 2009, ICCAS-SICE 2009

作者： Yoshiyama, Hiroaki Sugi, Takenao Wang, Bei Shirakawa, Shuichiro Nakamura, Masatoshi Department of Electrical and Electronic Engineering Saga University Saga Japan Department of Automation East China University of Science and Technology Shanghai China National Center of Neurology and Psychiatry Tokyo Japan Departmcnt of Advanced Systems Control Engineering Saga University Saga Japan

ISBN: (纸本)9784907764333

Human sleep stages during whole night are usually classified into six stages based on polysommnographic (PSG) record. Sleep state of human light sleep changes gradually and continuously. In this study, automatic judgment of light sleep state in PSG record was developed. Parameters for characterizing the PSG were calculated from the periodogram and the discriminant function was constructed by using conditional probability Estimated value of wake full level was gradually decreased according to the stage charged from W to S1. In contrast, changing the sleep state from S1 to S2 increased estimated value of sleep level accordingly. © 2009 SICE.

关键词： Sleep research

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A rotatable placement algorithm and GA to the nesting problem

A rotatable placement algorithm and GA to the nesting proble...

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2009 WRI World Congress on Computer Science and Information engineering, CSIE 2009

作者： Luo, Tzuo-Liang Chen, Jian-Horng Lai, Yuan-Lung Mechanical and System Research Laboratories Industrial Technology Research Institute Taiwan School of Physical Therapy Chung Shan Medical University Taiwan Department of Mechanical and Automation Engineering Da-Yeh University Taiwan

ISBN: (纸本)9780769535074

The objective of two-dimensional optimal nesting problem is to place the same or different pieces of the fixed quantity on the sheet in this paper. What we want to do is increase the rate of utility and decrease the waste of panel. Generally, determine the quality of the nesting results;it can briefly be divided into two factors: placement algorithm and permutation. Placement algorithm means to decide the positions where the pieces place into the sheet. And permutation is the placing sequence order of pieces. If the sequence of permutation is available and the placement rule also meets the demand of packing, then the exact or optimal solutions could be found. This research provides a new placement algorithm rule "Area-Decomposition" method. This combines the rotation function for each piece and genetic algorithm. A comparison of nesting with literature and commercial software shows the results. This research can really acquire good results of nesting according to the demand of different situations in interest. © 2008 IEEE.

关键词： Genetic algorithms

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Construction of a fault tolerance connected dominating set in wireless sensor network

Construction of a fault tolerance connected dominating set i...

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2009 International Conference on Measuring technology and Mechatronics automation(ICMTMA 2009)(2009年检测技术与机械自动化国际会议)

作者： Peng Zeng Yongzhao Bian Haibin Yu Department of Industrial Control System Shenyang Institute of Automation Chinese Academy of Sciences Department of Mechanical and Electronic Engineering Shenyang Institute of Automation Chinese Academy

In wireless sensor networks, virtual backbone has been proposed as the routing infrastructure to alleviate the broadcasting storm problem and perform some other tasks such as area monitoring. Previous work in this area has mainly focused on how to construct a small virtual backbone for high efficiency, which is modeled as the minimum Connected Dominating Set (MCDS) problem. However, the nodes in the CDS need to carry other nodes' traffic and they are subject to failure. Therefore, it is desirable to construct a fault tolerant CDS. In this paper, we first propose a distributed algorithm to construct a connected dominating set (DACDS). Based on DACDS, we further develop a fault tolerant algorithm (kCDS). We also show our algorithm have better performance ratios and low message complexity.

关键词： wireless sensor network (WSN) virtual backbone connected dominating set (CDS) mazimal independent set (MIS) fault tolerant

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Research on the Robustness of a Proportional Integral Switching Surface Based on Sliding Mode Control

Research on the Robustness of a Proportional Integral Switch...

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International Conference on Advanced Computer Control, ICACC

作者： Jun Liu Yang Wang Meng-zhi Huang Jian-bo Lu Department of Automation and Electronic Engineering Qingdao University of Science and Technology Qingdao China

In this paper, a novel proportional-integral (PI) switching surface is introduced for determining the synchronization performance of systems in the sliding mode motion. Based on the sliding mode controller, the system is established by a robust control scheme which guarantees the occurrence of a sliding motion of error states even when the parameter uncertainty and external disturbance are present. So this paper researches on robust synchronization problem by investigating a highly complex dynamic nonlinear system-chaotic systems. Some simulation results on controlling different chaotic systems are made and investigated in order to demonstrate the good performance of the method and this control design process is much easier to be completed.

关键词： Robust control Sliding mode control Motion control Control systems Error correction Uncertain systems Robustness Nonlinear dynamical systems Control system synthesis Chaos

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Global Robust Optimal Sliding Mode Control for a Class of Affine Nonlinear systems with Uncertainties Based on SDRE

Global Robust Optimal Sliding Mode Control for a Class of Af...

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International Workshop on Computer Science and engineering (WCSE)

作者： Haiping Pang Luping Wang Department of Automation and Electronic Engineering Qingdao University of Science and Technology Qingdao China

Integrating the sliding mode control (SMC) theory with state-dependent Riccati equation (SDRE), a new design method of global robust optimal sliding mode control for a class of affine nonlinear systems with uncertainties is studied in this paper. First, by using the SDRE approach, an optimal control law for nonlinear systems without uncertainties is obtained. Then the sliding mode control theory is used to robustify the optimal control system, which is affected by the parameter variations or extraneous disturbances. As a result, the system is global robust to uncertainties. So the global robust optimal sliding mode control base on SDRE is realized. Finally, the optimal performance and robustness to system uncertainty of the proposed approach are demonstrated successfully by a simulation example.

关键词： Robust control Sliding mode control Nonlinear systems Uncertainty Optimal control Nonlinear control systems Control systems Robustness Design engineering Riccati equations

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Research on Vector-Control system of PMSM Based on Internal Model Control of Current Loop

Research on Vector-Control System of PMSM Based on Internal ...

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International Workshop on Computer Science and engineering (WCSE)

作者： Jun Liu Meng-zhi Huang Yang Wang Department of Automation and Electronic Engineering Qingdao University of Science and Technology Qingdao China

The current regulation based on the internal model control is applied to vector control of PMSM. It avoids the adjustment of two PI-parameters; moreover the IMC structure improves the characteristic of the current loop. Generally, the flux of PMSM is changing with the load current (torque). Simulation results under flux saturation considered and not considered show that the current internal model controller can provide good performance with matched model and unmatched model. And the system has good features of the robustness to disturbances, and parameter variations. Satisfactory performance can be achieved.

关键词： Stators Automatic control Feedback Torque Voltage control Equations automation Robustness Machine vector control Robust control

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Study of Internal Model Control Based on Feedforward Compensation

Study of Internal Model Control Based on Feedforward Compens...

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International Workshop on Intelligent systems and Applications, ISA

作者： Shu-Fen Qi Yong Yang Chong Zhao Department of Automation Electronic Engineering Qingdao University of Science and Technology Qingdao China

For the common time-delay problems in the industrial process control, combined with controlling superiority and a good tracking performance in feedforward control of internal model control(IMC) on the time-delay system, a method based on feedforward compensation is brought up. In this paper, for the glass tank furnace charged with variable time lag, as well as the input variables vulnerable to interference, we use the method to carry out the analysis, the results show that the method has a good track and disturbance rejection performance in time-delay system.

关键词： Control systems Automatic control Electric variables control Temperature control Three-term control automation Industrial control Interference Control theory Transfer functions

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A New Kind of Dynamic Matrix Algorithm in the Process Control

A New Kind of Dynamic Matrix Algorithm in the Process Contro...

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International Workshop on Intelligent systems and Applications, ISA

作者： Bao-Ming Shan Jing Zhang Zhenxi Chen Department of Automation Electronic Engineering Qingdao University of Science and Technology Qingdao China

Dynamic matrix control algorithm is a predictive control algorithm based on step response of the object, suitable for complex control systems and the process whose mathematical model is difficult to be established precisely. In the article, the dynamic matrix control algorithm has been studied, we analyse the impact on system control quality using dynamic matrix control algorithms with different setting parameters, and make simulation in the thermal power plants control process. The simulation results show that dynamic matrix predictive control algorithm can achieve good control effect in the process.

关键词： Heuristic algorithms Process control Prediction algorithms Predictive control Control system synthesis Mathematical model Algorithm design and analysis Analytical models Power generation Predictive models

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Research on Ultrasonic Detection of Seabed Oil Pipeline Based on Wavelet Packet De-Noising

Research on Ultrasonic Detection of Seabed Oil Pipeline Base...

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Shu-fen Qi Chong Zhao Yong Yang Department of Automation Electronic Engineering Qingdao University of Science and Technology Qingdao China

It is very important, by analyzing and processing ultrasonic echo signals of seabed oil pipeline, to acquire the effective information. Because of the complicated detection system structure and ultrasound coupler impurity, there are inevitably different noises in echo signals. In order to improve the accuracy of detection, it is very necessary to process ultrasonic echo signals by de-noising. According to characteristics of ultrasonic echo signals, we proposed a de-noising method, based on wavelet packet in this article. With this method, the principle of wavelet packet de-noising and the selection of threshold functions are applied into detecting and de-noising ultrasonic echo signals. The experiment and simulation results show that this de-noising method, by increasing the signal-to-noise ratio, can obviously improve the noise suppression effect and detection accuracy on ultrasonic echo signals of seabed oil pipeline.

关键词： Petroleum Pipelines Wavelet packets Noise reduction Signal processing Signal to noise ratio Information analysis Signal analysis Ultrasonic imaging Impurities

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An improved particle swarm optimization with feasibility-based rules for constrained optimization problems

An improved particle swarm optimization with feasibility-bas...

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22nd International Conference on Industrial, engineering and Other Applications of Applied Intelligent systems, IEA/AIE 2009

作者： Sun, Chao-Li Zeng, Jian-Chao Pan, Jeng-Shyang Complex System and Computational Intelligence Laboratory Taiyuan University of Science and Technology Taiyuan Shanxi 030024 China Department of Electronic Engineering National Kaohsiung University of Applied Sciences Kaohsiung 807 Taiwan

ISBN: (纸本)3642025676

This paper presents an improved particle swarm optimization (IPSO) to solve constrained optimization problems, which handles constraints based on certain feasibility-based rules. A turbulence operator is incorporated into IPSO algorithm to overcome the premature convergence. At the same time, a set called FPS is proposed to save those P best locating in the feasible region. Different from the standard PSO, g best in IPSO is chosen from the FPS instead of the swarm. Furthermore, the mutation operation is applied to the P best with the maximal constraint violation value in the swarm, which can guide particles to close the feasible region quickly. The performance of IPSO algorithm is tested on a well-known benchmark suite and the experimental results show that the proposed approach is highly competitive, effective and efficient. © 2009 Springer Berlin Heidelberg.

关键词： Particle swarm optimization (PSO)

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