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1st International Workshop on Digital engineering, IWDE 2010

作者： Tuchscheerer, Sven Dittmann, Jana Hoppe, Tobias Krems, Josef F. University of Magdeburg Dep. of Computer Science Multimedia and Security Germany University of Chemnitz Department of Psychology Cognitive and Engineering Psychology Germany

ISBN: (纸本)9781605589923

In this paper, we present an approach for designing security warnings in vehicles for software based security incidents. With this we pursue the goal of reducing safety relevant component failures, which can be caused by manipulated or malicious software. The basis of our work is a theoretical analysis of the correlation of manipulated software (including malware) in automotive systems with the safety relevant failures of system components. We describe the potential of a security warning, which can be presented in time ahead of a traditional safety warning: The latter would only indicate safety-relevant implications that potentially arise later as an implication of the preceding security incident. In this paper we suggest three exemplary icons for a combined security-safety warning. Combined warning means a warning not at the time of a safety-relevant failure but already in the detection of the security-violation (e.g. manipulated software in the vehicle). An essential precondition is a recognition algorithm for such malicious software, which has been examined in previous research like [3]. Based on theoretical analyses, we introduce an exemplary design for the testing of these warnings in a virtual environment, precisely, in a driving simulator. A couple of factors play a central role in such evaluations, such as: perception, reaction of the driver, interpretation of warnings and security awareness. The results can be interpreted in the context of the fundamental aim: the reduction of accidents by security alerts. They thus serve as a recommended course of action for implementation in future vehicles. © 2010 ACM.

关键词： Malware

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Face detection based on feature analysis and edge detection against skin color-like backgrounds

Face detection based on feature analysis and edge detection ...

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International Conference on Genetic and Evolutionary Computing

作者： Huang, Deng-Yuan Lin, Ta-Wei Ho, Chun-Ying Hu, Wu-Chih Department of Electrical Engineering Dayeh University Changhua Taiwan Dep. of Computer Science and Information Engineering National Penghu University of Science and Technology Penghu Taiwan

ISBN: (纸本)9780769542812

In this paper, we propose a method of face detection based on feature analysis and edge detection against skin colorlike backgrounds. The proposed method consists of three phases including image preprocessing, skin color segmentation, and determination of face candidates. First, the objects in foreground are separated by image preprocessing. Second, the non-skin color objects are rejected by the method of skin color segmentation. Finally, both the elimination of skin color-like blobs in backgrounds and face detection are performed by the method of determination of face candidates. Experimental results show that the proposed method can effectively detect most of faces in skin color-like backgrounds. In addition, detection of face images with pose and expression variations or against dark backgrounds are also carried out. © 2010 IEEE.

关键词： Face recognition

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Using fuzzy modeling to describe power system QV curve

Using fuzzy modeling to describe power system QV curve

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作者： Wang, Shu-Chen Wu, Chi-Jui Department of Computer and Communication Engineering Taipei College of Maritime Technology Taipei Taiwan Dep. of Electrical Engineering National Taiwan University of Science and Technology Taipei Taiwan

ISBN: (纸本)9789604741748

This paper presents the fuzzy modeling approach to the description QV curve of power system for analysis of voltage stability. Voltage instability of power system comes from increasing load rapidly, and causes bus voltage to drop. When voltage is out of control and it can be voltage collapse. The QV curve can identify voltage stability limit, and it determine robustness of power system. The method of fuzzy modeling has been proven to be well-suited for modeling nonlinear industrial processes described by input-output data. In view of the nonlinear characteristic of the QV curve, the method of fuzzy modeling is employed for representing the curve. The fuzzy system model is basically a collection of fuzzy IF-THEN rules that are combined via fuzzy reasoning for describing the features of a system under study. Based on the Sugeno-type fuzzy model, various models with different numbers of modeling rules are used to describing the QV curve. It is found that such fuzzy model offers both quantitative and qualitative descriptions for the QV curve.

关键词： Electric power system stability

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Design of modal insensitivity for generator via Eigenstructure Assignment

Design of modal insensitivity for generator via Eigenstructu...

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ISBN: (纸本)9789604742332

This paper presents the design of modal insensitivity for the synchronous generator in a power system using Eigenstructure Assignment. In the proposed design procedure, modal insensitivity of generator is achieved by assigning system eigenstructure and only algebraic computations are involved. Model insensitivity means that the concerned system mode shape is insensitive to small variations in the system. From the simulation results of the study in a single-machine-infinite-bus system are certified. It is found that the system damping has been greatly improved. The proposed design has improved on the sensitivity.

关键词： Synchronous generators

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Analysis of extensive power factor by FPGA under power quality disturbance

Analysis of extensive power factor by FPGA under power quali...

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ISBN: (纸本)9789604741748

This paper used six formulas for power factor measurement, and they will be different according to the characteristics of load. The power quality is more and more serious, because a lot of information technology equipments and power electric converters were used in recent years. Harmonic and load unbalance can affect the measurement result of power factor of utility. The Fast Fourier Transform (FFT) is used to analyze the six formula of power factor. The simulation system was modeled in Hardware Description Language (VHDL) and some novel IP (intellectual property) cores, such as CORDIC core and FFT core by the way of Bottom-Up. The technology of semiconductor was more and more maturely. Design of SOC (System On a Chip) is a trend to achieve the strong and small volume in the future. The measurement data were employed to calculate active, reactive and apparent power. The average error rate of our design is about 0.05%.

关键词： Field programmable gate arrays (FPGA)

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Improvement in service robot's interaction through case based reasoning

Improvement in service robot's interaction through case base...

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2010 6th IEEE World Congress on Computational Intelligence, WCCI 2010 - 2010 International Joint Conference on Neural Networks, IJCNN 2010

作者： Roncancio, Catalina Rodríguez, Jose L. Zalama, Eduardo Gómez G-B, Jaime Robotics Computer Vision and Biomedical Engineering Department CARTIF Foundation Parque Tecnologico de Boecillo Parc 205 Valladolid Spain ISA Dep. University of Valladolid Valladolid Spain

ISBN: (纸本)9781424469178

In order to enable tight interaction and close collaboration between human and service robots it is necessary that robots imitate the cognitive mechanisms of the brain and their role in competent activity control. That goal can only be achieved if robots are capable of observing their environment, reasoning about it, and autonomously deciding the most appropriate action in a given situation. We present a possible application in this broad area: "Sacarino" is a service robot desingned to work as bellboy in a hotel environment as part of the ROSETEL project. In order to tackle the challenge of learning by interaction we define: (i) the scenarios in which our agent have to work, (ii) its prior knowledge in an episodic memory module to be used in a prime dialog interaction, and (iii) the proper architecture that will support intelligent behaviour suitable for the control of our robot. We will use frameworks like JCOLOBRI (Cases and Ontology Libraries Integration for Building Reasoning Infrastructures) to define the agent's memory structure, taking a deeper look into the episodic memory of the system. © 2010 IEEE.

关键词： Case based reasoning

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Neuro-fuzzy approach for default diagnosis: Application to the DAMADICS

Neuro-fuzzy approach for default diagnosis: Application to t...

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2010 4th IEEE International Conference on Digital Ecosystems and Technologies, DEST 2010

作者： Kourd, Y. Guersi, N. Lefebvre, D. Department of Control Engineering Faculty of Science and Engineer Mohamed Khider Biskra University Algeria Dep. of Electronic University of Badji Mokhtar Annaba Algeria GREAH University of Havre 25 rue Philippe Lebon 76058 Le Havre France

ISBN: (纸本)9781424455539

The failures auto-sensing becomes increasingly essential in the complex systems exploitation. This article consists in working out a system of defects diagnosis based on an artificial intelligence technique which associates fuzzy logic with neural networks. The method is applied to obtain the DAMADICS (Development and Application of Methods for Actuator Diagnosis in Industrial control Systems). This technique with its capacities of generalization and memorizing gives effective diagnostic tools. In the first part of this work, we studied the modelling of this industrial actuator, simulation gives an idea of the actuator behaviour in a normal mode functioning. Then, we carried out the diagnosis of defects during abnormal operations by using a neuro-fuzzy classifier. © 2010 IEEE.

关键词： Actuators

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Generalized Direct Power control for Grid Connected Multilevel Converters

Generalized Direct Power Control for Grid Connected Multilev...

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2010 IEEE International Conference on Industrial Technology (ICIT 2010)

作者： Sebastian Rivera Samir Kouro Patricio Cortes Salvador Alepuz Mariusz Malinowski Bin Wu Jose Rodriguez Dep. of Electronics Engineering Universidad Tecnica Federico Santa Maria Valparaiso Chile Dep. of Electrical and Computer Engineering Ryerson University Toronto Ontario Canada Dep. of Electronic Engineering Technical University of Catalonia Barcelona Spain Institute of Control and Industrial Electronics Warsaw University of Technology Warsaw Poland

ISBN: (纸本)9781424456956

This paper presents a generalized direct power control (DPC) scheme for grid connected multilevel converters. The proposed method extends the original DPC operating principle by considering only for selection the closest vectors to the present switching state. This approach requires the power derivatives for feedback, which can present numerical implementation problems in real time. Therefore a grid virtual flux based observer is proposed to overcome this issue. The proposed method is applicable to any multilevel converter topology of any number of levels. In this paper simulations results are presented for a 9 level cascaded H-bridge converter. The proposed solution enables DPC for multilevel converters used in medium voltage applications while improving overall power quality and efficiency of the system.

关键词： Direct power control multilevel converters grid connection

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Design of accurate power factor measurement approach using FPGA-based chip

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WSEAS Transactions on Circuits and Systems 2010年第7期9卷 453-462页

In recent years, power electronic components introduce harmonic pollution on electric power systems. It makes the traditional electromechanical power meter can not act accurately when it feeds unbalanced and harmonic loads. Power quality analysis now tends to use digital signal technology. But it is hard to avoid measurement errors in estimating power quality by digital signal technology. In this paper, it is to improve the computation errors by using FPGA. The simulation circuits were created and measured by Matlab. Then it will discuss the case of single-phase full-wave bridge rectifier loads. And then in the three-phase circuit the effective power factor, arithmetic power factor, and fundamental power factor will be compared in several simulation cases. The computation errors have been greatly reduced. In the study, the Fast Fourier Transform (FFT) is used to analyze the formula of power factor. The simulation system was modeled in Hardware Description Language (VHDL) and some novel IP (intellectual property) cores, such as CORDIC core and FFT core by the way of Bottom-Up. Design of SOC (System on a Chip) is a trend to achieve the strong and small volume in the future.

关键词： Field programmable gate arrays (FPGA)

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COMPRESSIVE SENSING SIGNAL RECONSTRUCTION BY WEIGHTED MEDIAN REGRESSION ESTIMATES

COMPRESSIVE SENSING SIGNAL RECONSTRUCTION BY WEIGHTED MEDIAN...

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IEEE International Conference on Acoustics, Speech, and Signal Processing

作者： Jose L. Paredes Gonzalo R. Arce Electrical Engineering Department Universidad de Los Andes Venezuela Dep. of Electrical and Computer Eng. University of Delaware USA

ISBN: (纸本)9781424442959

In this paper, we address the compressive sensing signal reconstruction problem by solving an l_0-regularized Least Absolute Deviation (LAD) regression problem. A coordinate descent algorithm is developed to solve this l_0-LAD optimization problem leading to a two-stage operation for signal estimation and basis selection. In the first stage, an estimation of the sparse signal is found by a weighted median operator acting on a shifted-and-scaled version of the measurement samples with weights taken from the entries of the projection matrix. The resultant estimated value is then passed to the second stage that tries to identify whether the corresponding entry is relevant or not. This stage is achieved by a hard threshold operator with adaptable thresholding parameter that is suitably tuned as the algorithm progresses.

关键词： Compressive Sensing weighted median linear regression sparse signal reconstruction Compressed sensing Signal reconstruction Linear Regression signals Signal estimation entry Incision, exploration and biopsy for determination of stage of disease trees (mathematics)

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