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A weighted sifting method to improve the effectiveness of collaborative filtering

A weighted sifting method to improve the effectiveness of co...

引用

IEEE TENCON 2004 - 2004 IEEE Region 10 Conference: Analog and Digital Techniques in Electrical engineering

作者： Sumiya, Tuguldur Park, Heungsun Chun, Jonghoon Lee, Zoonky Lee, Sang-Goo Kim, Eugene Shin, Donghoon Lee, Won-Gyu Choi, Jinwook Chang, Juno Department of Computer Engineering Myongji University Kyunggi-Do Korea Republic of Department of Statistics Hankook University of Foreign Studies Kyunggi-Do Korea Republic of Corelogix Inc. Department of Computer Engineering Myongji University Kyunggi-Do Korea Republic of Graduate School of Information Yonsei University Seoul Korea Republic of Center for E-Business Technology Seoul National University Seoul Korea Republic of Department of Applied Science Hongik University Seoul Korea Republic of Technical Auditor Corelogix Inc. Seoul Korea Republic of Department of Computer Education Korea University Seoul Korea Republic of School of Medicine Seoul National University Seoul Korea Republic of Division of Media Technology Sangmyung University Seoul Korea Republic of

In this paper, we improve the accuracy of the conventional collaborative filtering algorithm by proposing a weighted sifting method. The weighted sifting method preprocesses the given customer data to generate an adjusted customer data which we believe contains less noise than the original one, and thus effectively discriminates the preference weights of items for each customer. We present two alternative calculation methods for weight adjustment, and our experimental evaluation shows that both calculation methods result in better accuracy than traditional collaborative filtering. © 2004 IEEE.

关键词： computer supported cooperative work

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A novel distributed control architecture for shared protection

A novel distributed control architecture for shared protecti...

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IEEE Conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： J. Tapolcai Pin-Han Ho Xiaohong Jiang S. Horiguchi Department of Electrical and Computer Engineering University of Waterloo ONT Canada Department of Telecommunications and Media Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Graduate School of Information Science Japan Advanced Institute of Science and Technology Japan

The paper proposes a novel distributed control architecture for shared protection with reduced complete routing information, which aims to initiate a graceful compromise between the amount of link-state dissemination and the performance impairment due to the incompleteness of routing information. We first give explicit and comprehensive descriptions on a number of reported routing information dissemination scenarios for shared protection. A novel framework of link-state dissemination for facilitating shared protection, called reduced complete routing scenario, is introduced, in which the singular value decomposition (SVD) transformation is adopted to deal with the information reduction. We show, through simulation, that the proposed scheme can achieve a higher throughput and a better estimation in reconstruction of the spare provision matrix than the other schemes taking the same complexity of link-state dissemination.

关键词： Distributed control Protection Resource management Routing protocols Costs Scalability information management computer architecture Informatics information science

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Implementation of the 3-View MPEG-2 encoder/decoder using the fastimage 1300 board

Implementation of the 3-View MPEG-2 encoder/decoder using th...

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Proceedings of 2004 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2004

作者： Kim, Sung-Hyun Kim, Byung-Chan Park, Rae-Hong Kim, Je Woo Choi, Byeong Ho Jung, Hyeok Koo Department of Electronic Engineering Sogang Univ. C.P.O. Box 1142 Seoul 100-611 Korea Republic of Digital Media Research Center Korea Electronics Technology Institute Good Friend Bank B/D 270-2 SeoHyun-Dong Sungnam-Si KyungGi-Do 463-771 Korea Republic of School of Information Communication and Computer Engineering Hanbat National University Deokmyung-dong Yuseong-gu Daejeon 305-719 Korea Republic of

ISBN: (纸本)0780386396

This paper presents an implementation of the 3-view moving picture experts group-2 (MPEG-2) encoder/decoder using the FastImage 1300 board with four Trimedia 1300 processors. First of all, we convert MPEG-2 algorithms into a Trimedia streaming software architecture (TSSA) for real-time implementation. For motion estimation, 32-bit DSP operations are used with two processors in parallel, with one processor performing encoding and decoding. To share data between processors for disparity estimation, we employ a semaphore (for synchronization), queue, and direct memory access (DMA). Experiments show that with DSP board environment the processing times of the implemented 3-view encoder and decoder are reduced by a factor of five and three, respectively, in comparison with PC environment. © 2004 IEEE.

关键词： Decoding

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Implementation of the 3-view MPEG-2 encoder/decoder using the FastImage 1300 board

Implementation of the 3-view MPEG-2 encoder/decoder using th...

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IEEE International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)

作者： Sung-Hyun Kim Byung-Chan Kim Rae-Hong Park Je Woo Kim Byeong Ho Choi Hyeok Koo Jung Department of Electronic Engineering Sogang University Seoul South Korea Digital Media Research Center Korea Electronics and Technology Institute Sungnam Gyeonggi South Korea School of Information Communication and Computer Engineering Hanbat National University Daejeon South Korea

ISBN: (纸本)0780386396

This paper presents an implementation of the 3-view moving picture experts group-2 (MPEG-2) encoder/decoder using the FastImage 1300 board with four Trimedia 1300 processors. First of all, we convert MPEG-2 algorithms into a Trimedia streaming software architecture (TSSA) for real-time implementation. For motion estimation, 32-bit DSP operations are used with two processors in parallel, with one processor performing encoding and decoding. To share data between processors for disparity estimation, we employ a semaphore (for synchronization), queue, and direct memory access (DMA). Experiments show that with the DSP board environment, the processing times of the implemented 3-view encoder and decoder are reduced by a factor of five and three, respectively, in comparison with the PC environment.

关键词： Decoding Image coding Video compression Transform coding Layout Software algorithms Software architecture Motion estimation Digital signal processing Humans

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A weighted sifting method to improve the effectiveness of collaborative filtering

A weighted sifting method to improve the effectiveness of co...

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IEEE Region 10 International Conference TENCON

作者： Tuguldur Sumiya Jonghoon Chun Sang-goo Lee Donghoon Shin Jinwook Choi Heungsun Park Zoonky Lee Eugene Kim Won-Gyu Lee Juno Chang Department of Computer Engineering Myongji University Kyunggi South Korea Center for E Business Technology Seoul National University Seoul South Korea Technical Auditor Corelogix Inc. Seoul South Korea School of Medicine Seoul National University Seoul South Korea Department of Statistics Hankook University of Foreign Studies Kyunggi South Korea Graduate School of Information Yonsei University Seoul South Korea Department of Applied Science Hongik University Seoul South Korea Department of Computer Education Korea University Seoul South Korea Division of Media Technology Sangmyung University Seoul South Korea

ISBN: (纸本)0780385608

关键词： Collaboration information filtering information filters Filtering algorithms Collaborative work Statistics computer science education Noise generators Internet Marketing and sales

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Time and energy efficient service discovery in Bluetooth

Time and energy efficient service discovery in Bluetooth

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IEEE Conference on Vehicular technology (VTC)

作者： I. Sedov S. Preuss C. Cap M. Haase D. Timmermann Department of Computer Science University of Rostock Germany Department of Computer Science Chair for Information and Communication Services University of Rostock Germany Department of Electrical Engineering and Information Technology Institute of Applied Microelectronics and Computer Science Germany

Key challenges in wireless mobile ad hoc networks are computational resource constraints, power limitations, and efficient service discovery techniques. The short range radio network technology Bluetooth suffers from long service discovery delays and high power consumption due to necessary connection establishment between discovering and discovered entity. For improving the efficiency of service discovery in Bluetooth networks we propose two new approaches. By leveraging the implicit broadcast capability of the Bluetooth inquiry procedure, we significantly reduce the service discovery time and hence lower the power consumption. Moreover, we enable the integration of resource limited devices which are incapable of taking part in service discovery themselves. Based on a performance evaluation and a comparison with legacy Bluetooth service discovery protocol (SDP), we present the benefits of our new approaches.

关键词： Energy efficiency Bluetooth Energy consumption Protocols Broadcasting Petroleum computer science Mobile ad hoc networks Personal area networks Temperature sensors

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Rule acquisition for production scheduling. A genetics-based machine learning approach to flexible shop scheduling

Rule acquisition for production scheduling. A genetics-based...

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SICE Annual Conference

作者： H. Tamaki K. Sakakibara H. Murao S. Kitamura Department of Computer and Systems Engineering Faculty of Engineering Kobe University Japan Department of Information and Media Science Graduate School of Science and Technology Kobe University Japan Department of Communication Studies Faculty of Cross-Cultural Studies Kobe University Japan

ISBN: (纸本)0780383524

In this paper, we deal with an extended class of flexible shop scheduling problems, and consider a solution under the condition in which information on jobs to be processed may not be given beforehand, i.e., under the framework of real-time scheduling. To realize a solution, we apply such a method where jobs are to be dispatched by applying a set of rules (rule-set), and propose an approach in which a rule-set is generated and improved by using the genetics-based machine learning technique. Through some computational experiments, the effectiveness and the potential of the proposed approach are investigated.

关键词： Job shop scheduling Production Machine learning Processor scheduling Genetic engineering Computational modeling Manufacturing systems Dispatching Mathematical programming Genetic algorithms

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A multi-signature scheme with signers’ intentions secure against active attacks 4th

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4th International Conference on information Security and Cryptology, ICISC 2001

作者： Kawauchi, Kei Minato, Hiroshi Miyaji, Atsuko Tada, Mitsuru Asahidai 1-1 Tatsunokuchi Nomi Ishikawa923-1292 Japan Department of Electrical Engineering and Computer Science Tufts University Halligan Hall 161 College Avenue MedfordMA02155-5528 United States Institute of Media and Information Technology Chiba University Japan

ISBN: (纸本)3540433198

In this paper, we propose a multi-signature scheme, in which each signer can express her intention associating with the message to be signed. Signers’ intentions mean a kind of information which can be newly attached to a signature in signers’ generating it. However, we have been introduced no multi-signature scheme dealing with intentions without loss of its efficiency. First, we consider a multi-signature scheme realizing the concept of signers’ intentions by utilizing existing schemes, and name it primitive method. After that, we introduce the proposed multi-signature scheme which is more efficient than the primitive method in view of the computational cost for verification and in view of the signature size. The proposed multi-signature scheme is shown to be secure even against adaptive chosen message insider attacks. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Authentication

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Fast k-nn image search with self-organizing maps

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International Conference on Image and Video Retrieval, CIVR 2002

作者： Oh, Kun Seok Aghbari, Zaher Kim, Pan-Koo Department of Digital Media Division of Information Technology Kwangju Health College 683-3 Shinchang-dong Kwangsan-ku Gwangju506-701 Korea Republic of Department of Intelligent Systems Graduate School of Information Science and Electrical Engineering Kyushu University 6-10-1 Hakozaki Higashi-Ku Fukuoka812-8581 Japan Department of Computer Engineering Chosun University 375 Seosuk-dong Dong-ku Gwangju501-759 Korea Republic of

ISBN: (纸本)9783540438991

Feature-based similarity retrieval became an important research issue in image database systems. The features of image data are useful in image discrimination. In this paper, we propose a fast k-Nearest Neighbor (k-NN) search algorithm for images clustered by the Self-Organizing Maps algorithm. Self-Organizing Maps (SOM) algorithm maps feature vectors from high dimensional feature space onto a two-dimensional space. The mapping preserves the topology (similarity) of the feature vectors by clustering mutually similar feature vectors in neighboring nodes (clusters). Our k-NN search algorithm utilizes the characteristics of these clusters to reduce the search space and thus speed up the search for exact k-NN answer images to a given query image. We conducted several experiments to evaluate the performance of the proposed algorithm using color feature vectors and obtained promising results. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Nearest neighbor search

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Self-calibration and neural network implementation of photometric stereo

Self-calibration and neural network implementation of photom...

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International Conference on Pattern Recognition

作者： Y. Iwahori Y. Watanabe R.J. Woodham A. Iwata Center for Information and Media Studies Nagoya Institute of Technology Nagoya Japan Faculty of Engineering Nagoya Institute of Technology Nagoya Japan Department of Computer Science University of British Columbia Vancouver BC Canada

This paper describes a new approach to neural network implementation of photometric stereo for a rotational object with non-uniform reflectance factor Three input images are acquired under different conditions of illumination. One illumination direction is chosen to be aligned with the viewing direction. We require no separate calibration object to estimate the associated reflectance maps. Instead, self-calibration is done using controlled rotation of the target object itself. Self-calibration exploits both geometric and photometric constraints. A radial basis function (RBF) neural network is used for non-parametric functional approximation. The neural network training data are obtained from rotations of the target object. Further, the method makes it possible to determine whether or not a given boundary point lies on an occluding boundary. The approach is empirical without needing a distinct calibration object and without making any specific assumptions about the surface reflectance. Experiments on real data are described.

关键词： Neural networks Photometry Reflectivity Calibration Light sources Table lookup Shape Lighting Training data Equations

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