检索结果-内蒙古大学图书馆

作者： Tsai, Jinn-Tsong Ho, Wen-Hsien Chou, Jyh-Horng Guo, Ching-Yi Department of Computer Science National Pingtung University of Education 4-18 Ming Shen Road Pingtung 900 Taiwan Department of Medical Information Management Kaohsiung Medical University 100 Shi-Chuan 1st Road Kaohsiung 807 Taiwan Institute of System Information and Control National Kaohsiung First University of Science and Technology 1 University Road Yenchao Kaohsiung 824 Taiwan Department of Electrical Engineering National Kaohsiung University of Applied Sciences 415 Chien-Kung Road Kaohsiung 807 Taiwan

A Taguchi-sliding-based differential evolution algorithm (TSBDEA) is proposed in this study to solve the problem of optimally approximating linear systems. The TSBDEA is an approach of combining the differential evolution algorithm (DEA) with the Taguchi-sliding-level-method (TSLM). In the TSBDEA, the TSLM is to provide a new systematic crossover operation for breeding better offspring, and consequently enhances the DEA. By using the proposed TSBDEA, the optimal approximate rational model with/without a time delay for a system described by its rational or irrational transfer function is sought such that an error criterion is minimized. Numerical examples show that the presented TSBDEA gives an effective and robust way for obtaining optimal reduced-order models for stable/unstable and/or nonminimum-phase complex systems, and can get better results than the existing DEA-based method reported in the literature. © 2010 Elsevier B.V. All rights reserved.

关键词： Linear systems

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Testing Static Single Cell Faults using static and dynamic data background

Testing Static Single Cell Faults using static and dynamic d...

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Student Conference on Research and Development (SCOReD)

作者： Nor Azura Zakaria W.Z.W Hasan Izhal Abdul Halin R.M. Sidek Xiaoqing Wen Microelectronic Department PDSI Technology Park Malaysia Kuala Lumpur Malaysia Department of Electrical and Electronic Engineering Faculty Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Creative Informatics Graduate School of Computer Science & System Engineering Kyushu Institute of Technology Iizuka Japan

This work proposes a bit-adjacent Data Background (DB) management scheme to improve fault coverage of March algorithms while simultaneously maintaining the shortest test cycle. Both static and dynamic DB transitions are used in order to detect Deceptive Read Destructive Faults (DRDFs) and Write Disturb Faults (WDFs) that are not detected by previous algorithms. A conventional March Test Algorithm can be modified by using the DB management scheme to form a new March Test Algorithm (referred to as Mod March Test Algorithm), e.g., MATS++(6N) becoming Mod MATS++(6N). This paper shows that Mod March SR (14N) and Mod March CL (12N) can detect DRDFs and WDFs while the corresponding conventional algorithms cannot. It is also shown that Mod March CL(12N) and Mod March SR(14N) with DB management can detect all Static Single Cell Faults based on the Bit-Oriented-Memories (BOM) test method. Comparisons on test cycle time for Mod March SR, March SR, and March SS in the context of memory Built-In-Self-Test (BIST) are also presented. From the simulation result, it shows that by including Data Backgrounds (DBs) management in Bit-Oriented Memories (BOM), the cycle test time is the same after a given multiple of DBs in the test algorithm.

关键词： Random access memory Strontium Built-in self-test Partitioning algorithms Bills of materials Fault detection

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Appling rough set method to analyze the weighting of influence factor in resource recycling

Appling rough set method to analyze the weighting of influen...

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IEEE/SICE International Symposium on system Integration

作者： Ying-Yi Lyu Mei-Li You Kun-Li Wen Huei-Chu Wen Automation Engineering & Institute of Mechatronoptic System Department Chienkuo Technology University Changhua Taiwan General Education Department Chienkuo Technology University GSRC Changhua Taiwan Electrical Engineering Department Chienkuo Technology University GSRC Changhua Taiwan Computer Science and Engineering Department National Taiwan Ocean University Keelung Taiwan

With the human being's advances in technology and business economic growth, the consumption of material grows rapidly, and cause many environmental problems. If we can understand the importance of resource recycling, then, it can leave a clean space for future generations. Hence, the paper uses significant to analyze the weightings, and use reduct to calculate the frequency of influence factor, then, the importance of influence items could be reached. Through the actual analysis, the results not only correspond to the previous research, but also provide the strategies to the resource recycling plants to increase the operational efficiency.

关键词： Recycling Set theory Educational institutions Business Copper Iron Approximation methods

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Modelling, analysis and control of multi-agent systems: A brief overview

Modelling, analysis and control of multi-agent systems: A br...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： Jinhu Lü Guanrong Chen Xinghuo Yu School Electrical Computer Engineering RMIT University Melbourne Australia Acad. Mathematics System Science Chinese Academy and Sciences Beijing China Department Electrical Engineering City University of Hong Kong Kowloon Hong Kong China School Electrical Computer Engineering RMIT University Melbourne VIC Australia

Multi-agent systems are ubiquitous in the world. Recently, multi-agent systems have received increasing attention from mathematics, physics, engineering sciences, and social science communities. This paper firstly introduces several fundamental concepts and then reviews several representative models of multi-agent systems, including the Boids model, Vicsek model, Couzin-Levin model and its invariants, and various complex dynamical networks. Based on these models, it further investigates the dynamical behaviors of multi-agent systems, such as consensus, convergence, adaptation, and consensus decision-making. Moreover, it briefly reviews the main progress in the control of multi-agent systems. Finally, it looks ahead into some important research topics on multi-agent systems, with regard to modelling, analysis, and control.

关键词： Multiagent systems Mathematical model Adaptation model Control systems Analytical models Computational modeling

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Construction-and-extraction based index for images retrieval

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and systems 2011年第7期131卷 1377-1383页

作者： Zhang, Junqi Ni, Lina Tian, Chunqi Gao, Shangce Tang, Zheng Department of Computer Science and Technology Key Laboratory of Embedded System and Service Computing Tongji University Shanghai 200092 China College of Info Sci and Engi Shandong University of Science and Technology Qingdao 266510 China Department of Intellectual Information Systems Engineering University of Toyama Toyama-shi 930-8555 Japan

The past recent years have witnessed more and more applications on image retrieval. As searching a large image database is often costly, to improve the efficiency, high dimensional indexes may help. This paper proposes an adaptive hybrid index (AHI) supported by a construction-and-extraction technique to support image retrieval. First, the image clusters are further partitioned into sub-clusters to reduce the overlap between clusters and indexed into an iDistance index. Then, the query sampling statistically extracts some sub-cluster from the iDistance index into a sequential file. Finally, the users' queries are accurately returned by searching both the iDistance index and the sequential file. It's proved that the proposed AHI never performs worse than the sequential scan. Particularly, the experimental results demonstrate that the proposed index AHI is beneficial and achieves better performance than some exiting methods. It is about 2 times faster than iDistance, almost three times than Omni-sequential, more than four times faster than sequential file and more than 10 times faster than M-tree on the benchmark images set. The effect of the proposed AHI is also investigated by our implemented content based images retrieval system. © 2011 The Institute of Electrical Engineers of Japan.

关键词： Extraction

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A no-reference image quality evaluation based on power spectrum

A no-reference image quality evaluation based on power spect...

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3DTV Conference

作者： Yan Zhang Ping An Qiuwen Zhang Liquan Shen Zhaoyang Zhang School of Communication and Information Engineering Shanghai University China Department of Computer Science and Technology Anhui University of Finance and Economics China Key Laboratory of Advanced Displays and System Application Ministry of Education China

ISBN: (纸本)9781612841618

No-reference quality evaluation is more difficult because it does not refer to any image. However, in some cases, like virtual view images, can not find the reference image, no-reference method had to be used. With the free viewpoint video technology development and application, measuring the performance of the multiview video system is essential and virtual view image quality evaluation is one of the key technologies in the system. The characteristic of virtual view image quality evaluation is that most of the virtual view images haven't reference images and can't be assessed using general measures such as PSNR of full-reference. Therefore, this paper proposed a no-reference image quality evaluation method based on image power spectrum. Experimental results show that the proposed method is consistent with PSNR.

关键词： PSNR Image quality Three dimensional displays Transform coding Mathematical model Speckle

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Improved multi-view depth estimation for view synthesis in 3D video coding

Improved multi-view depth estimation for view synthesis in 3...

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3DTV Conference

作者： Qiuwen Zhang Ping An Yan Zhang Liquan Shen Zhaoyang Zhang School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Displays and System Application Ministry of Education China Department of Computer Science and Technology Anhui University of Finance and Economics China

ISBN: (纸本)9781612841618

Multi-view depth estimation is an important part in the virtual view synthesis and depth map coding within the 3DV/FTV applications. However, existing depth estimation methods generally have difficulty to generate good depth results around object edges or in areas with less texture. To solve this problem, we propose an improved algorithm to obtain a smooth and accurate depth map for view synthesis in 3D video coding. The proposed method aims to preserve details in the depth map and simultaneously smooth depths in object boundary occluded area, less texture and discontinuity regions, to avoid blurring in the synthesized views. Experimental results show a significant improvement of the initial input depth maps and coding efficiency, as well as a reduction of view synthesis artifacts.

关键词： Estimation Pixel Three dimensional displays Encoding Rendering (computer graphics) Image coding Transform coding

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An improved depth map estimation for coding and view synthesis

An improved depth map estimation for coding and view synthes...

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IEEE International Conference on Image Processing

Inaccuracy depth estimation may influence on depth coding and virtual view rendering in the free-viewpoint television (FTV) system, an improved depth map estimation is proposed to solve the problem for coding and view synthesis. Firstly, check the consistency of initial depth, and the influence of initial miss-matches is minimized by introduction of an additional adaptive matching error selection that penalizes the unreliable matches. Then according to certain criteria, the multi-reference depth maps are merged into one disparity map to improve the quality of disparity map. Finally, a multilateral filtering is used to preserve details in the depth map and simultaneously smooth the depths in occluded areas at object boundary, less texture and discontinuity regions. Experimental results show a significant improvement of the initial input depth maps and coding efficiency, as well as a reduction of view synthesis artifacts.

关键词： Estimation Image coding Rendering (computer graphics) Transform coding Three dimensional displays Filtering

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Local color vector binary pattern for face recognition

Local color vector binary pattern for face recognition

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IEEE International Conference on Image Processing

作者： Seung Ho Lee Jae Young Choi Konstantinos N. Plataniotis Yong Man Ro Image and Video System Laboratory Korea Advanced Institute of Science and Technology Daejeon South Korea The Edward S Rogers Sr Department of Electrical and Computer Engineering University of Toronto Toronto ONT Canada

This paper proposes local color vector binary pattern (LCVBP) as a new color based face descriptor for face recognition (FR). In the proposed LCVBP, color pixel pattern of different spectral images is extracted as discriminative information. Further, to maximize a complementary effect taken from different color channels, color angle pattern between a pair of different spectral images is incorporated into the creation of LCVBP. Experimental results on three public databases (CMU-PIE, XM2VTSDB, and Color FERET) show that the proposed color texture feature is able to significantly improve FR performance, compared to the conventional grayscale texture features including Gabor wavelet and Local Binary Pattern (LBP). In particular, the proposed LCVBP is able to provide excellent FR performance for face images taken under severe illumination variation.

关键词： Image color analysis Face Feature extraction Vectors Gray-scale Histograms Face recognition

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Efficient rendering distortion estimation for depth map compression

Efficient rendering distortion estimation for depth map comp...

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IEEE International Conference on Image Processing

作者： Qiuwen Zhang Ping An Yan Zhang Zhaoyang Zhang School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Displays and System Application Ministry of Education China Department of Computer Science and Technology Anhui University of Finance and Economics China

A depth map represents three-dimensional (3D) scene information and is used to synthesize virtual views in 3D video. Since the quality of synthesized virtual views highly depends on the quality of depth map, efficient depth compression is crucial to realize the 3D video system. However compressing depth map using existing video coding techniques yields unacceptable distortions while rendering virtual views. To solve this problem, we propose an efficient depth map compression method for the view rendering, a novel distortion metric base on view rendering distortions instead of distortion of depth map itself. First, we derive relationships between distortions in coded depth map and rendered view. Then, a region based video characteristics distortion model is proposed for precisely estimation distortion in view synthesis. Finally, experimental results have shown that 1.8 dB coding gain in terms of PSNR and subjective quality improvement of synthesized views are achieved by the proposed method.

关键词： Image coding Rendering (computer graphics) Three dimensional displays Cameras Geometry Encoding Estimation

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