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IEEJ Transactions on Electronics, Information and systems 2010年第4期130卷 686-695+19页

作者： Takahashi, Takuya Aoki, Yoshimitsu Kouchi, Makiko Mochimaru, Masaaki Department of Electrical Engineering and Computer Science Shibaura Institute of Technology Graduate School of Engineering 3-7-5 Koto-ku Toyosu Tokyo 134-8548 Japan Department of Electronics and Electrical Engineering Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Kouhoku-ku Yokohama 223-8522 Japan Digital Human Research Center National Institute of Advanced Industrial Science and Technology 2-41-6 Koto-ku Aomi Tokyo 135-0064 Japan

A hand version of the computer manikin, called "digital hand", is considered as an effective assessment tool for hand-operated products at the design stage. In order to construct various sizes and proportions of hands in a computer, it is required to develop the system that can measure the accurate dimensions of hands automatically. In this paper, an image-based measurement system of hand dimensions has been proposed. The system utilizes an image scanner for acquiring a hand image in 2D. First, the joint positions of fingers are estimated by extracting the edges of the wrinkles on a palm and fingers in this image. For this process, anatomical constraint is effectively considered. Then, the 2D dimensions of a hand are automatically calculated. In addition, based on the fact that the dimensions of a hand are highly correlated each other, the system estimates the 3D measures of a hand, such as the thickness and circumference of fingers and a palm by regression analysis. The accuracy and reproducibility was validated using the proposed system by comparison with actual results measured by traditional method. The results prove our system has enough capability for actual hand measurement and its applications. © 2010 The Institute of Electrical Engineers of Japan.

关键词： Regression analysis

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Fast method to detect specific frequencies in monitored signal

Fast method to detect specific frequencies in monitored sign...

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4th International Symposium on Communications, Control, and Signal Processing, ISCCSP-2010

作者： Jaber, Marwan A. Massicotte, Daniel Electrical and Computer Engineering Department Laboratory of Signal and System Integrations Université du Québec Trois-Rivières QC G9A 5H7 Canada

ISBN: (纸本)9781424462858

The Discrete Fourier Transform (DFT) is a mathematical procedure that stands at the center of the processing that takes place inside a digital Signal Processor. It has been known and argued through the literatures that the Fast Fourier Transform (FFT) is useless in detecting a specific frequency in a monitored signal because most of the computed results are ignored. In this paper we will present an efficient FFT based method to detect specific frequencies in a monitored signal which is compared to the most frequently used method "the Goertzel's Algorithm". Parallel implementation structure show a fast computation method compared to the Goertzel's algorithm. Computational speedup gains of r using radix-r butterfly are shown. ©2010 IEEE.

关键词： digital signal processors

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Road pavement density analysis using a new non-destructive ground penetrating radar system

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Progress In Electromagnetics Research B 2010年第21期 399-417页

作者： Mardeni, R. Raja Abdullah, R.S.A. Shafri, H.Z.M. Faculty of Engineering Multimedia University Cyberjaya Selangor 63100 Malaysia Faculty of Engineering Department of Computer and Communication System Universiti Putra Malaysia Serdang Selangor 43400 Malaysia Faculty of Engineering Department of Civil Engineering Universiti Putra Malaysia Serdang Selangor 43400 Malaysia

Density is an important parameter to determine the strength of road, and it will ensure the safety of the use as well as maintaining the quality of road pavement. In this paper, the validation of GPR mixture model based on the microwave nondestructive free space method to determine the density of road pavement typed Hot Mix Asphalt (HMA) will be presented. The frequency range of operation used is 1.7-2.6GHz. The attenuation is a major factor for gathering the density of road pavement predictably. The existing mixture model has been used to produce simulation data for determining the predicted complex permittivity and attenuation due to various densities of road pavement. The GPR laboratory measurement is performed where the measured attenuation due to various densities was obtained. The comparison results between measurement and simulation were investigated, and the relative errors in between were calculated to see the performance of the model. The best performance of mixture model was selected due to the smallest mean error using the optimization technique. An improved attenuation formula or optimized mixture model was obtained from the optimization technique to produce the better model. The finding from the optimization process suggested that three additional constant parameters which are volume factor, permittivity factor and attenuation factor need to be included to improve the existing mixture model. The optimized mixture model is introduced as GPR mixture model in this work. The validation process at field test had been conducted to evaluate the performance of optimized GPR model and produce the error range from 3.3% and 4.7%. At the end of this project, the GPR mixture model can be used as a calibration curve where the values of predicted density of a given real road pavement can be read directly once the attenuation values are known.

关键词： Ground penetrating radar systems

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Color estimation base on a giving color estimation PC-based system

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Procedia - Social and Behavioral Sciences 2010年第1期2卷 120-124页

作者： Jin Tao Hitoshi Hoshino Yusaku Fujii Jia Hongzhi Koichi Maru Hou Wenmei Shanghai Key Laboratory of Modern Optical System School of Optical-Electrical and Computer Engineering University of Shanghai for Science and Technology Shanghai 20093 China Department of Electronic Engineering Faculty of Engineering Gunma University Gunma 376-8515 Japan

A person's clothes color information was estimated by using a prototype PC-based system. The novel concept can be divided into 3 stages. First, space-variant color filter is put onto the lens of the monochrome security camera. Secondly, when a crime takes place, the camera records suspected person. Finally, just after the crime, characteristics of the space-variant color filter are measured by the police, and the color of the clothes of the suspected person is estimated. In this experiment six kind reference color cloth were used. The result shows using this system to estimate the clothes color is easily, rapidly and precisely.

关键词： Color estimation Crime prevention Information technology

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A Continuous Authentication system Based on User Behavior Analysis

A Continuous Authentication System Based on User Behavior An...

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International Conference on Availability, Reliability and Security, ARES

作者： Ines Brosso Alessandro La Neve Graça Bressan Wilson Vicente Ruggiero College of Computation and Informatic Mackenzie Presbyterian University Sao Paulo SP Brazil Department of Electrical Engineering Centro Universitário da FEI Sao Paulo SP Brazil Laboratory of Computer Architecture and Networks Department of Computer and Digital System Engineering Polytechnic School of São Paulo University Brazil Laboratory of Computer Architecture and Networks Department of Computer and Digital System Engineering Polytechnic School of São Paulo University Brazil

ISBN: (纸本)9781424458790

This paper presents a continuous authentication system based on user behavior analysis that makes use of environmental context information, users' behavior analysis and Neuro-Fuzzy Logic. This system must be able to acquire information in context, making them into a computational environment. This information is the basis of user behavior. The system, based on the evidences of the behavior, establishes if it can trust the user or not. According to the user behavior, levels of trust are released, to access the application software. Weights are attributed in the fuzzyfication process, according to the rules that were previously established for the parameters which help to establish the evidences of behavioral trust, in its different degrees. The neuro-fuzzy logic allows that the user behavioral database be continuously updated, interacting with the fuzzyfication mechanism, so as to keep trust levels updated according to the user behavior, in a more accurate and faithful way.

关键词： Authentication Application software Information analysis Information security Logic Signal analysis Humans computer security computer networks Electronic mail

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An expert system using rough sets theory and self-organizing maps to design space exploration of complex products

An expert system using rough sets theory and self-organizing...

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作者： Chu, Xue-Zheng Gao, Liang Qiu, Hao-Bo Li, Wei-Dong Shao, Xin-Yu State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology 1037 Luoyu Road Wuhan Hubei 430074 China Department of Engineering and Manufacturing Management Faculty of Engineering and Computing Coventry University Priory Street Coventry CV1 5FB United Kingdom

In complex product design, product performance driving design is a new and innovative research in the engineering field. For realizing the product performance driving design, an elaborated expert system, Expert systems for Assisting Mapping from Performance Space to Design Space (ESMPD) is proposed, which have two main modules for mapping from product performance space to interesting design space by two layers mapping method. In Rough Sets Theory Analysis Module, Rough Sets Theory (RST) is used to calculate configuration rules in incomplete configuration information system to assist product designers in mapping performance space to configuration space. In self-organizing maps Analysis Module, SOM is employed to analyze design variables and objective function based on preliminary optimization, to mapping from the fixed configuration space to smaller interesting regions in design space. The contribution of this research is utilizing the product design knowledge to guide engineer to partition and reduce the design space, which can save product design time and promote the design efficiency. Finally, a new bulk carrier design is taken as a case study to prove the validity and necessity of this expert system. The detailed analysis testifies ESMPD can effectively facilitate rapid and intelligent design, and reduce the cost of complex product design. Crown Copyright © 2010 Published by Elsevier Ltd. All rights reserved.

关键词： Expert systems

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A novel relaying protocol in a cooperative network with decode-and-forward relays

A novel relaying protocol in a cooperative network with deco...

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International Conference on Electrical engineering/Electronics, computer, Telecommunications and Information Technology, ECTI-CON

作者： Sara Efazati Paeiz Azmi Communication System Laboratory(CSL) Department of Electrical and Computer Engineering Tarbiat Moalem University Iran

ISBN: (纸本)9781424456062;9789746724913

Cooperative diversity techniques make a reduction in spectral efficiency despite of an increase in reliability. In this paper we propose a novel relaying protocol in a cooperative network with decode and forward (DF) relays to improve the spectral efficiency in addition to achieving full diversity order (maximum available reliability). The proposed protocol keeps the transmission rate fixed to the rate of point-to-point transmission and outperforms rather than conventional relaying protocols such as fixed, selection and incremental relaying protocols. The simulation results show the effectiveness of our method and confirm our claim.

关键词： Protocols Decoding digital relays Detectors Transmitting antennas Maximum likelihood detection Feedback Fading Wireless communication Performance gain

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systematic identification of applications for a cluster of femto-satellites

Systematic identification of applications for a cluster of f...

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作者： Sundaramoorthy, Prem P. Verhoeven, C.J.M. Electronic Research Laboratory Faculty of Electrical Engg Mathematics and Computer Science Delft University of Technology Mekelweg 4 2628 CD Delft Netherlands Department of Space Systems Engineering Faculty of Aerospace Engineering Delft University of Technology Kluyverweg 1 2629 HS Delft Netherlands

ISBN: (纸本)9781617823688

Embracing reduced requirements and leveraging commercial technology has led to a fast growing small satellite industry. Although most interest in small satellites has hovered around the micro-satellites through to the pico-satellites, academic interest now extends up to the sub 100 g range of satellites as well. Femto-satellites with a mass range between 10 g and 100 g could in the future be mass produced and hundreds to thousands of femto-satellites can be deployed as a cluster to enhance, for example, the situational awareness of the Earth's environment. Femto-satellite is seen to form the next class of miniature satellites which will exploit spacecraft engineering, swarm science and mission design to realize exciting new space missions. Consequently, there has been considerable research interest in the sub 100 g range of satellites and the advantage of distributed satellites in space. However, most of the research work has been limited to a bottom-up approach to realize an individual femto-satellite with as much functionality as possible, without sufficient attention to the realization of an application using these distributed femto-satellites in space. This has resulted in an ambiguous top tier of space applications whose realization with a cluster of femto-satellites is arguable. The paper outlines the different realizations of distributed systems in space and identifies the most suitable candidate for femto-satellites. The aim is to map the user requirements for applications to the scaled capability of a cluster of femto-satellites, thereby aiding to systematically identify potential applications for femto-clusters. The principal challenge is that there exists no simple means to scale the capability of an individual femto-satellite to the capability of a distributed cluster of femto-satellites. Scaling certain capabilities is not straightforward. For example, when we consider a user requirement such as orbit control, the inherent virtue of a distributed system

关键词： Satellites

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Image Watermarking Using Luminance Averaging and Adaptive Prediction from Nearby Pixels

Image Watermarking Using Luminance Averaging and Adaptive Pr...

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International Conference on Information engineering and computer Science (ICIECS)

作者： Thitiporn Pramoun Prat Nudklin Thumrongrat Amornraksa Multimedia Communication Laboratory Computer Engineering Department Faculty of Engineering King Mongkut''s University of Technology Bangkok Thailand

In this paper, we propose a new method to enhance the performance of digital image watermarking based on pixels modification. The proposed method is implemented in both watermark embedding and retrieving processes. In the embedding process, an averaging technique is applied to the luminance components of the host image in order to obtain a better fine tuned watermark signal strength. In the retrieval process, a new prediction technique is used to adaptively remove a pair of nearby pixels having the highest difference from the predicting pixel in order to obtain a better watermark accuracy. The experimental results in terms of PSNR and NC values of the proposed method are given and compared to the previous watermarking methods. In addition, the improved robustness against attacks from the proposed method are presented and compared.

关键词： Watermarking Pixel Robustness Color Humans Adaptation model Image color analysis

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Intelligent and cooperative manufacturing planning

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International Journal of Manufacturing Research 2010年第1期5卷 39-57页

作者： Li, Wei Dong Gao, Liang Faculty of Engineering and Computing Coventry University Coventry United Kingdom State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan Hubei China Department of Industrial and Manufacturing System Engineering Huazhong University of Science and Technology China

In this research, several intelligent strategies have been developed to build up cooperative Process Planning and Scheduling (CPPS). Three game theory-based strategies have been introduced to analyse the cooperative integration of the two processes in a systematic way. To address the multiple constraints in the CPPS problem, a fuzzy logic-based Analytical Hierarchical Process (AHP) technique has been applied. In the meantime, modern heuristic algorithms have been developed and applied to the CPPS problem to identify optimal or near-optimal solutions from the vast search space efficiently. Experiments have been conducted and results show the objectives of the research have been achieved. Copyright © 2010 Inderscience Enterprises Ltd.

关键词： Heuristic algorithms

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