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International Conference on Intelligent systems Design and Applications (ISDA)

作者： I. J. Pérez E. Herrera-Viedma J. López-Gijón F. J. Cabrerizo Dept. of Computer Science A.I University of Granada Granada Spain Dept. of Library Sciences University of Granada Granada Spain Department of Software Engineering Distance Learning University of Spain Madrid Spain Dept. of Software Engineering Distance Learning University of Spain (UNED) Madrid Spain

In this contribution, we present a new application based on fuzzy linguistic information to evaluate the quality of digital libraries. The quality evaluation of digital libraries is defined using users' perceptions on the quality of digital services provided through their Web sites. We assume a fuzzy linguistic modeling to represent the users' perception and apply automatic tools of fuzzy computing with words based on some weighted aggregation operators to compute global quality evaluations of digital libraries.

关键词： Libraries Pragmatics Quality assessment Web sites Computational modeling Context Intelligent systems

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Fuzzy modeling of brain tissues in Bayesian segmentation of brain MR images

Fuzzy modeling of brain tissues in Bayesian segmentation of ...

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2010 IEEE EMBS Conference on Biomedical engineering and Sciences, IECBES 2010

作者： Farzan, Ali Mashohor, Syamsiah Rahman Ramli, Abd Mahmud, Rozi Dept. of Computer and Communication Systems Faculty of Engineering University Putra Malaysia 43400 Serdang Selangor Malaysia Institute of Advanced Technology UPM Japan Faculty of Radiology University Putra Malaysia 43400 UPM Serdang Selangor D.E. Malaysia

ISBN: (纸本)9781424476008

Segmentation of brain MRI is the core part in plenty of medical image processing methods. Due to some properties of MR images such as intensity inhomogeneity of tissues, partial volume effect, noise and some other imaging artifacts, segmentation of brain MRI based on voxel gray values is prone to error. Hence involving problem specific information and expert knowledge in designing segmentation algorithms seems to be useful. A two-fold fuzzy segmentation algorithm based on Bayesian method is proposed in this paper. The Bayesian part uses the gray value of voxels in segmenting images and the segmented image is used as the input to fuzzy classifier to improve the misclassified voxels especially in borders between tissues. Similarity index is used to compare our algorithm with the well known method of Ashburner which has been implemented by Statistical Parametric Mapping (SPM) software. Two different brain MRI datasets are used to evaluate the algorithm. Brainweb as a simulated brain MRI dataset and ADNI as real brain MRI dataset are practiced images. Results show that our algorithm performs well in comparison with the one implemented in SPM. It can be concluded that incorporating expert knowledge and problem specific information in segmentation process improve segmentation result. The major advantage of proposed method is that one can update the knowledge base and incorporate new information into segmentation process by adding new fuzzy rules. © 2010 IEEE.

关键词： Magnetic resonance imaging

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A Boosting Method based on SVM for Relevance Feedback in Content-based 3D Model Retrieval

A Boosting Method based on SVM for Relevance Feedback in Con...

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The 2nd International Conference on software engineering and Data Mining(IEEE 第二届国际软件工程和数据挖掘学术大会 SEDM 2010)

作者： Tao Wei Xiaoman Cao Zheng Qin Biao Leng Dept. of Computer Science and Tech.Tsinghua University China School of Software Tsinghua University China School of Computer Science and Engineering Beihang University China

ISBN: (纸本)9781424473243;9788988678220;9788988678213

The technique of relevance feedback has been introduced to content-based 3D model retrieval. Support Vector Machine as a learner is one of the classical approaches in relevance feedback. And the Boosting method, as one of the ensemble methods. can establish a strong leaner by combing the component learners. In this paper, a novel relevance feedback mechanism, which makes use of the main idea of boosting and the component SVM, is presented and applied to the content-based 3D model retrievaL The experiments, based on the 3D model database Princeton Shape Benchmark, show that the relevance feedback algorithm can improve the retrieval performance of traditional SvM in 3D model retrievaL

关键词： Content-based 3D model retrieval Relevance feedback Support Vector Machine Boosting

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An experimental analysis of the effects of noise on Wi-Fi video streaming

An experimental analysis of the effects of noise on Wi-Fi vi...

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IEEE Instrumentation & Measurement Technology Conference

作者： L. Angrisani K. Kyriakopoulos A. Napolitano D. J. Parish M. Vadursi W. Whittow Dept. of Computer Science and Control Systems University of Naples Federico II Dept. of Electronic and Electrical Engineering Loughborough University Dept of Electrical Engineering University of Naples Federico II Dept. of Technologies University of Naples "Parthenope"

ISBN: (纸本)9781424428328;9781424428335

Wireless networks such as WiFi suffer communication performance issues in addition to those seen on wired networks due to the characteristics of the radio communication channel used by their Physical Layers (PHY). Understanding these issues is a complex but necessary task given the importance of wireless networks for the transfer of wide ranging packet steams including video as well as traditional data. Simulators are not accurate enough to allow all the intricacies of such communication to be accurately understood, especially when complex interactions between the protocols of different layers occurs. The paper suggests cross layer measurement as a solution to the problem of understanding and analysis of such complex communication issues and proposes a framework in which appropriate performance measurements can be made from a WiFi network supporting a video streaming application. The framework has been used to collect these measurements at the PHY, MAC, Transport and Application layers. Analysis of the collected measurements has allowed the effects of noise interference at the PHY to be related to the perceived performance at the Application Layer for a video streaming application. This has allowed the effect of the SNR on the download time of a video sequence to be studied.

关键词： Cross-layer measurements Video streaming Wireless networks Wi-Fi

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Issues on Building an MPI Cluster on Microblaze

Issues on Building an MPI Cluster on Microblaze

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International Conference on Reconfigurable Computing and FPGAs (ReConFig)

作者： Juan-Carlos Diaz-Martin Carolina Gómez-Tostón Gutiérrez Álvaro Cortés Fácila Juan-Antonio Rico-Gallego Dept. of Computer Technology and Communications University of Extremadura Cáceres Spain Dept. of Computing and Telematic Systems Engineering University of Extremadura Cáceres Spain

MPI is the traditional paradigm to parallelize applications for High Performance Computing environments. AzequiaMPI is an implementation of the MPI-1.3 standard. Its thread-based architecture enables it to run on high-end HPC machines as well as on embedded environments as soft-core processor in FPGAs. This article describes the experience of building a maintainable cluster of fourteen popular Xilinx XUP2-Pro FPGA development boards around the PetaLinux/Micro blaze base. Figures on the AzequiaMPI performance are given.

关键词： Field programmable gate arrays Servers IP networks Multicore processing Ethernet networks Bandwidth Protocols

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Fast 3D Image dept. Map Estimation Using Wavelet Analysis

Fast 3D Image Depth Map Estimation Using Wavelet Analysis

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2010 International Conference on Audio,Language and Image Processing(2010年音频、语言与图像处理国际会议 ICALIP 2010)

作者： Yu-Hong Lin Te-Wei Chiang Tienwei Tsai Mann-Jung Hsiao Dept. of Multimedia Design Chihlee Institute of Technology Dept. of Accounting Information Systems Chihlee Institute of Technology Dept. of Information Management Chihlee Institute of Technology Dept. of Computer Science and Engineering Tatung University

ISBN: (纸本)9781424458561

This paper is to propose a method for dept. estimation in a 2D image using wavelet analysis. According to our observations, the high frequency components represent focused objects in images of limited dept. of field (DOF) and their high frequency wavelet subbands contain high energy. In our approach, each image is first transformed to YUV domain and the Y component is extracted for further analysis. Afterwards, the high frequency bands are derived with wavelet analysis. Through two stages of smoothing and scale manipulation, the dept. map data with less error can be used for some 3D display. The experimental result shows that the proposed approach is effective and efficient for dept. map estimation.

关键词： Wavelet Analysis two dimentional images Y-component dept. OF FIELD images MAPPING(MATHEMATICAL) maps Three-Dimensional Images smoothing High frequency target image

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Rendering and Animating Expressive Caricatures

Rendering and Animating Expressive Caricatures

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2010 3rd IEEE International Conference on computer Science and Information Technology—ICCSIT 2010

作者： Mohammad Obaid Ramakrishnan Mukundan Mark Billinghurst Computer Science and Software Engineering Dept. University of CanterburyNew Zealand HITLab New Zealand University of CanterburyChristchurchNew Zealand

We present a novel approach for generating stylized artistic rendering of caricatures from a given face image,with the ability to map any one of the main six expressions and control the degree of its expressiveness on the generated caricature. Our method achieves this by manipulating the facial appearance and expressivity of the caricature,using quadratic deformation model representations of facial expressions.A stroke-based non-photorealistic rendering(NPR) engine is developed to generate the output caricature that appears to be a sketch of the original *** NPR engine segments the defined rendering path and generates rectangular strokes that approximate each segment. The stroke properties arc computed by applying geometric image moments on each *** enhance the overall appearance of the caricature,extra strokes are randomly positioned around the rendering *** results show that from an input neutral facial image,expressive rendered caricatures are generated for the facial expressions neutral,smile,sad,fear,surprise,disgust, and *** approach produces very expressive artistically rendered caricatures,and could lead to future research directions in further extending the method to produce pencil sketch rendering of images or rendering 3D characters to generate cartoon-like 3D characters.

关键词： Expressive Caricatures Non-photorealistic Rendering Caricature Sketch Rendering Facial Caricature

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An Investigation onTacit Knowledge Transfer Among Aircraft Engineer: Malaysia Experience

An Investigation onTacit Knowledge Transfer Among Aircraft E...

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The 2nd International Conference on software engineering and Data Mining(IEEE 第二届国际软件工程和数据挖掘学术大会 SEDM 2010)

作者： R.Ahmad N. Khamis N. Jamain M.H.N.M.Nasir Z.M.Kasirun B.Abd Latif Dept. of Software Engineering Faculty of Computer Science and Information Technology University of M Malaysian Institute of Aviation Technology Universiti Kuala Lumpur MALAYSIA

Transfer of gained experience, skills and know-how in aircraft maintenance from experts to trainees assures the organizational learning in providing quality of service. Taking survey method, this paper presents an early investigation on effective mechanism of knowledge transfer among aircraft engineers in Malaysia and a proposal on its implementation within the aviation domain.

关键词： tacit knowledge knowledge transfer organizational learning aircraft maintenance Malaysia

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Editors' preface for associated workshops section

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2010年 5968 LNCS卷 V-VI页

作者： Grundspenkis, Janis Manolopoulos, Yannis Mlynkova, Irena Morzy, Mikolaj Necasky, Martin Nikiforova, Oksana Novickis, Leonids Osis, Janis Wrembel, Robert Riga Technical University Dept. of Systems Theory and Design Meza str 1/4 Riga LV 1048 Latvia Aristotle University Dept. of Informatics Thessaloniki 54124 Greece Riga Technical University Division of Applied Computer Systems Software Meza str 1/4 Riga LV 1048 Latvia

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Self-Tracking Mobile Station Controls Its Fast Handover in Mobile WiMAX

Self-Tracking Mobile Station Controls Its Fast Handover in M...

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IEEE Conference on Wireless Communications and Networking

作者： Sayan Kumar Ray Swapan Kumar Ray Krzysztof Pawlikowski Allan McInnes Harsha Sirisena Comput. Sci. & Software Eng. Dept. Univ. of Canterbury Christchurch New Zealand Comput. Sci. & Eng. Dept. Jadavpur Univ. Kolkata India Computer Science and Software Engineering Dept University of Canterbury Christchurch New Zealand Electrical and Computer Engineering Dept University of Canterbury Christchurch New Zealand

This paper proposes a mobile station (MS)-controlled fast MAC-layer handover (HO) scheme to reduce the HO latency in Mobile WiMAX. Based on the received signal strength (RSS) from any Base Station (BS), the MS can estimate its present distance from that BS. This capability allows the MS, through utilization of the broadcast messages by its Serving BS (SBS) and through few scannings of the Neighbouring BSs (NBS), to self-track its own direction of motion relative to the SBS and the NBSs and thus look ahead to perform an intelligent choice of the Target BS (TBS) for the impending HO. Simulation studies have shown a considerable reduction in the HO latency in the proposed method.

关键词： WiMAX Delay Mobile computing NIST computer science Base stations Routing Mobile ad hoc networks Quality of service Communications Society

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