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Computer and Automation Engineering, 2009. ICCAE '09. International Conference on

Date 8-10 March 2009

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Displaying Results 1 - 25 of 85
  • [Front cover]

    Publication Year: 2009
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  • [Title page i]

    Publication Year: 2009 , Page(s): i
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  • [Title page iii]

    Publication Year: 2009 , Page(s): iii
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  • [Copyright notice]

    Publication Year: 2009 , Page(s): iv
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  • Table of contents

    Publication Year: 2009 , Page(s): v - x
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  • Preface

    Publication Year: 2009 , Page(s): xi - xii
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  • ICCAE 2009 Technical Committee

    Publication Year: 2009 , Page(s): xiii
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  • ICCAE 2009 Organizing Committee

    Publication Year: 2009 , Page(s): xiv
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  • list-reviewer

    Publication Year: 2009 , Page(s): xv
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  • Enhanced Maintenance Architecture for E-commerce Applications

    Publication Year: 2009 , Page(s): 3 - 7
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (227 KB) |  | HTML iconHTML  

    This paper deals with network architecture which is a combination of electronic commerce and maintenance system in the typical Internet ecosystems. The e-commerce application that is typically known as online shopping can be considered as a multi-channel queueing system. In the other hand, stochastic maintenance system is designed for maintain the servers in the e-commerce. The security system in this research deals with a complex system that consists of main unreliable servers, backups and repair facilities to repair the broken servers. The solution presents the analytical solutions of the combined architecture of two queueing systems and these tractable results are used for demonstration in the framework of optimization problems. It also gives the guideline for the more complex systems to improve the availability of the networks. View full abstract»

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  • Adaptive Control for Time-varying Nonlinear System

    Publication Year: 2009 , Page(s): 8 - 11
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (165 KB) |  | HTML iconHTML  

    An adaptive control scheme is proposed for a kind of time-varying nonlinear systems. In the scheme the nonlinear systems are divided into a finite number of subsystems, which are in strict feedback and interpolated by functions of an exogenous scheduling variable. The adaptive method yields stability of all signals in the closed-loop. The results of simulation show that the controller converges very fast and the scheme is suitable for the time-varying nonlinear plant. View full abstract»

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  • Two Stage Control Method Based on an Optimal Control System

    Publication Year: 2009 , Page(s): 12 - 15
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (295 KB) |  | HTML iconHTML  

    This paper describes a two stage control system based on an optimal control system with the feedback of difference between the controlled plant output and the plant model output. It is combined a speed control system and a position control system. The speed control system controls the speed before a changeover point, and the position control system controls the position after the changeover point. To change the control system continually, the changeover point has to be determined pertinently. The position control system controls the position from changeover point to set-point, so that the overshoot is irrespective of the set-point. Although the two stage control system without the feedback of the difference between the controlled plant output and the plant model output is remained the steady-state error in the disturbance response, the proposed method does not have it. View full abstract»

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  • Iterative Learning Control for Switched Reluctance Motor Direct-drive Electro-Hydraulic Position Servo System

    Publication Year: 2009 , Page(s): 16 - 20
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (191 KB) |  | HTML iconHTML  

    Aiming at the serious saturation and dead zone nonlinearity, time-variability and time lag existing in pump-controlled cylinder electro-hydraulic servo system droved by SRM (Switched Reluctance Motor) directly, the ILC (iterative learning control) method was put forward to conduct the position servo control for hydraulic machine slider in this thesis. The mathematical model of SRM direct-drive electro-hydraulic servo system was founded. The control algorithms of open loop and closed loop ILC were designed according to the principle of ILC. The convergence characteristics and shift curve tracking abilities were researched by simulations and experiments. The results show that the convergence speed and accuracy of closed loop ILC exceed open loop by a big margin, and the ILC can effectively eliminate the influences of dead zone and time lag nonlinearity, and the closed loop ILC method can raise control accuracy of pump-controlled cylinder system remarkably compared with PID control. View full abstract»

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  • A Comparative Study of Wavelet Denoising for Multifunction Myoelectric Control

    Publication Year: 2009 , Page(s): 21 - 25
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (488 KB) |  | HTML iconHTML  

    The aim of this study was to investigate the application of wavelet denoising in noise reduction for multifunction myoelectric control system. Six upper limb motions including hand open, hand close, wrist extension, wrist flexion, pronation, and supination. For each motion, two channels of electrodes were applied. A comparative study of four classical denoising algorithms including universal thresholding, SURE thresholding, hybrid thresholding, and minimax thresholding have been used to remove white Gaussian noise at various signal-to-noise ratios (SNRs) from EMG signals. Applications of soft and hard thresholding as well as threshold rescaling methods were considered and the whole procedures of noise reduction were applied with different wavelet functions and different decomposition levels. Evaluations of the performance of noise reduction are determined using mean squared error (MSE). The results show that Daubechies wavelet with second orders (db2) provides marginally better performance than other possibilities. Suitable number of decomposition levels is four. Universal and soft thresholding is the best of wavelet denoising algorithms from eight possible denoising processes under investigation. In addition, the threshold using a level-dependent estimation of level noise showed better than others. View full abstract»

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  • Defect Detection in Textiles Using Morphological Analysis of Optimal Gabor Wavelet Filter Response

    Publication Year: 2009 , Page(s): 26 - 30
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1089 KB) |  | HTML iconHTML  

    This paper addresses new defect detection method in textile based on Morphological Analysis and Gabor wavelet filters responses. Our method consist of there part. First a bank of Gabor wavelet filters is applied on the textile image for extracting feature matrix. It is based on the energy response from the convolution of Gabor wavelet filters in different frequency and orientation domains. Then based on the response of filters, the optimal filter is selected among the filter bank. Considering the industrial requirement for finding adaptive solutions that can be executed in real time and reduce false rate, we use morphological analysis as an adaptive threshold technique for detection. By applying morphological analysis on response of the optimal filter, the defects are detected. The experimental results on different type of textiles show that the developed algorithm is robust, scalable and effective for detection various kind of textile defects. View full abstract»

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  • H2 Gain Scheduled Filtering for Polytopic Discrete-time Linear Parameter-Varying Systems

    Publication Year: 2009 , Page(s): 31 - 35
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (302 KB) |  | HTML iconHTML  

    In this paper, the problem of H2 filtering for polytopic discrete-time linear parameter-varying systems is studied. A gain scheduled filter, which not only can guarantee the filtering error system to be quadratically stable but also has a prescribed H2 performance, is determined. The filter design is implemented by means of a convex optimization procedure and the time-varying parameters are supposed to affect all system matrices. Sufficient conditions are given for the existence of the desired filters from the solution of a linear matrix inequality problem formulated only in terms of the vertices of the polytope. A numerical example shows that the proposed filter design method is more effective and less conservative than some existing results. View full abstract»

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  • Combining Missing Relative Distance and Information Retrieval Technique for Querying Missing Author in Directed Authorship Graph

    Publication Year: 2009 , Page(s): 36 - 40
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (392 KB) |  | HTML iconHTML  

    This paper proposed a new approach for imputing missing values called MIJI method.This method is the combination of two techniques, missing relative distance (MRD) and join frequency and inverse entity frequency (JFIEF). These techniques concentrate on the different aspects. The former technique focus to the relative position (i.e. offset and direction) among entities, small offset is high priority. The latter focus to the frequency of occurrence, high frequency is high priority. The accuracy of MRD is 61.50% and can be upgraded to 88.07% if using MIJI method. View full abstract»

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  • Collaboration Supported Automatic Examination Architecture

    Publication Year: 2009 , Page(s): 41 - 45
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (262 KB) |  | HTML iconHTML  

    During the past few years, automatic computer examination systems have been widely used for computer-based tests. But these systems are based on the traditional question-answer examination style which is limited for the collaborative examination. The collaborative examination needs multiple examinees and can be parallel performed. The collaborative examination also should consider the context of the examinee, e.g. the order of questions or the permissions of the examinee. To address the problems brought by the collaborative examination, we propose a novel collaboration supported automatic examination architecture based on task which is abstracted from the examination process. Our architecture is compatible with the traditional question-answer style examination and could meet the requests of the collaborative examination, such as order, dependency and collaboration. View full abstract»

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  • A Novel Approach for Edge Detection of Images

    Publication Year: 2009 , Page(s): 49 - 53
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (322 KB) |  | HTML iconHTML  

    Edge detection is a problem of fundamental importance in image analysis. Many approaches for edge detection have already revealed more are waiting to be. But edge detection using K-means algorithm is the most heuristic and unique approach. In this paper, we have proposed an algorithmic technique to detect the edge of any kind of true gray scale images considering the artificial features of the image as the feature set which is fed to K-means algorithm for clustering the image and there to detect clearly the edges of the objects present in the considered image. The artificial features, which we have considered here, are mean, standard deviation, entropy and busyness of pixel intensity values. View full abstract»

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  • Simulation and Experiment of Induction Motor Controller

    Publication Year: 2009 , Page(s): 54 - 58
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (360 KB) |  | HTML iconHTML  

    This paper gives an overview about motion control of induction motor and also presents the simulation and experiment of induction motor controller using method of voltage/frequency control. In this paper, the voltage/frequency (V/Hz) control principle is used to the speed controller for 3-phase AC induction motor. The DSP (TMS320F2812) controller is used to read the stator flux of motor (the AC machine stator flux is equal to the stator voltage). Then, PI controller gives the PWM generation to the motor. The method have been implemented and tested both in simulation and real time conditions. View full abstract»

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  • A Non-paradoxical Interpretation of the Voting Paradox

    Publication Year: 2009 , Page(s): 59 - 61
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (279 KB) |  | HTML iconHTML  

    The Voting Paradox, from its nature, denies the democratic voting system, and questions a series of related theories on philosophy, politics and economics. The Voting Paradox mechanism table was depicted and Majority Rule was revealed to be the cause of the Voting Paradox by analyzing its reasoning process. Based on this analysis and our proposed Model (NMU Model), the Voting Paradox Model (VPM Method) was set up and found that three alternative plans had an average poll of 33.33%. Statistical result showed an equal consequence with no plan gaining the upper hand. The nonexistence of paradoxical voting cycle proved that "Voting Paradox" is not paradoxical. Under the ordinal condition, a statistical method to model design, with the basis that social preference order was derived from individual preference order, was explored. Combining VPM approach, the ordinal voting method to Voting Paradox is not only easy to operate, but also more scientific than the traditional voting method, which can stand for the major wills to a larger extent. View full abstract»

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  • Implementation of Access Control System for Fiber to the Home

    Publication Year: 2009 , Page(s): 62 - 65
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (182 KB) |  | HTML iconHTML  

    This paper proposes a design and architecture of access control system to implement remote monitor and control for fiber to the home. Our solution works on a standard local area network (LAN) using a specially designed hardware interfaced with an Ethernet system rising PIC microcontroller. The developed design will be installed with optical line terminal (OLT) at the central office (CO). Protection switching is achieved automatically when failure occurs without interrupting customer service. View full abstract»

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  • Grey Decision on Oil Distillation Exchangers Rebuilding Project

    Publication Year: 2009 , Page(s): 66 - 69
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (632 KB) |  | HTML iconHTML  

    The exchangers on the top of distillation tower exposed to wash erosion seriously when Shengli refinery processed Middle-east crude oil. Considered the heat transfer efficiency, manufacture fee, maintenance fee, manufacture difficulty and safety in exchangers rebuilding project, established mathematics model with grey system theory, and carried on grey decision. Grey incidence decision shows that the helix-baffled structure with 20 carbon steel aluminizing tube is the preferential plan, then is helix-baffled structure with 20+TH847 tube, common structure with 20 carbon steel aluminizing tube, common structure with 20+TH847 tube. In general, helix-baffled structure is better than general contractures, should take action to lower the fabricate difficulty of helix-baffled exchangers. View full abstract»

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  • Development of Robot Assisted Hand Stroke Rehabilitation System

    Publication Year: 2009 , Page(s): 70 - 74
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (468 KB) |  | HTML iconHTML  

    A robot assisted hand stroke rehabilitation system is to be developed as this devastating disease have became one of the main reasons of the severe disabilities in the world. This project focuses on assisting the humanpsilas upper limb rehabilitation. The anatomy of the upper limb was first analyzed. Due to simplifications, the upper limb analysis was divided into two parts; the human arm which will consist of seven degrees-of-freedom and the human hand with the thumb modeled as five degrees-of-freedom and the other fingers as four degrees-of-freedom. The first stage of training involves assisting the patients to move their arm, one joint at a time in order to reach the desired end position and orientation. In the second phase of the training, patients are trained to grasp a particular object where the position of the object is fixed. Patients would then have to move according to the joint angles computed in order to reach the target object and to grasp it. This is mainly done for the fingers part. Apart from that, a physical CAD model was built in Solid Works and later translated into MATLAB SimMechanics for simulation purposes. The dynamical analysis was also performed in order to obtain the computed torque and based on that a PID controller was built to compensate the disturbances and imperfections. Finally, the model will be animated with the controller in the MATLAB Virtual Reality Toolbox orbisnap. View full abstract»

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  • Grey Prediction of Elbow Corrosion on Refinery Equipment

    Publication Year: 2009 , Page(s): 75 - 78
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (298 KB) |  | HTML iconHTML  

    Shengli refinery plant process Middle-east crude oil, the equipment is exposed to wash erosion seriously. The elbow on the entrance of the atmospheric distillation tower top exchangers always leak for eroding. Measured the thickness of elbow by ultrasonic thickness meter every month, find the accumulating generation operator of remnant thickness is quasi smooth sequence, established GM (1, 1 ) model with grey system theory, detected the error with relative error, model passed error check, is eligible. Used full data to create improved GM (1, 1) model to predict elbowdasias thickness in the future. The elbow life can reach to 24 month, but can not reach to 36 month. Select place to measure thickness by experience is out of truth. Use Fluent to emulate fluid field can help to find the place to monitor. View full abstract»

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