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共 1062 条记录，以下是121-130 订阅

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Routine learning:: Analyzing your whereabouts

Routine learning:: Analyzing your whereabouts

引用

international conference on information technology - coding and computing

作者： Pirttikangas, S Riekki, J Röning, J Univ Oulu Intelligent Syst Grp Dept Elect & Informat Engn Oulu Finland

ISBN: (纸本)0769521088

A routine is a temporal context sequence that occurs often. In routine learning, already recognized contexts are utilized in modeling the user behavior. The methodology is presented via a use case scenario. Data collected from various ubiquitous sensors are used in recognizing and defining contexts, and association rules determine the routines. The focus is on testing the suitability of the Apriori algorithm for this application area. Several useful routines were derived from the user data, and the results show that data mining can be utilized in pervasive computing.

关键词： pervasive computing association rules machine learning context-awareness locationing

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Autonomous and dynamic web service composition in wireless grids

Autonomous and dynamic web service composition in wireless g...

引用

international conference on information technology - coding and computing

作者： Guo, HM Yang, M Wu, XL Jiang, YT Ma, SL Hao, GS Beijing Univ Aeronaut & Astronaut Natl Lab Software Dev Environm Beijing 100083 Peoples R China

ISBN: (纸本)0769523153

In combination of web service and wireless technology, grid computing is evolved into a de facto standard for shared-resource computations. Although numerous efforts have been made on the construction of grid systems, stateless web set-vice composition has not been addressed sufficiently in grid environment, which is usually service-conscious. This paper attempts to address this issue through a novel work flow model which not only builds tasks through web services, also handles state control through the grid platform. Based on this model a grid system can ultimately compose web services and give user a better tool for supercomputing.

关键词： work flow service composition aggregation CNGG web service grid computing

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An improved polling scheme for voice support in IEEE 802.11 wireless network

An improved polling scheme for voice support in IEEE 802.11 ...

引用

international conference on information technology - coding and computing

作者： Zheng, J Regentova, E Univ Nevada Dept Elect & Comp Engn Las Vegas NV 89154 USA

ISBN: (纸本)0769523153

In this paper we present a polling scheme which allows for augmenting the support of voice communications in point co-ordination function (PCF) of IEEE 802. 11 wireless networks. In this scheme, the Access Point (AP) of the Basic Service Set (BSS) maintains two polling lists, i.e. the talking list and the silence list. Based on the talking status of the stations identified via silence detection, the two lists are dynamically adjusted by the AR Temporary removal is applied to the stations in the silence list to further upgrade the performance. The conducted study based on simulation has shown that the proposed scheme is able to support more voice stations and has a lower packet loss rate compared to that obtained by four reference polling algorithms.

关键词： Mobile computing

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Media access mechanisms for integrated services in wireless networks

Media access mechanisms for integrated services in wireless ...

引用

itcc 2005 - international conference on information technology: coding and computing

作者： Cheng, Sheng-Tzong Tao, Ming-Hung Wu, Mingzoo Department of Computer Science and Information Engineering National Cheng Kung University Tainan Taiwan

ISBN: (纸本)0769523153

In the paper, we propose a media access framework for supporting integrated service including the real-time service, the controlled load service, and the best effort service in wireless networks. Three medium access mechanisms, the "Multi-classes fair scheduling", the "Single-class fair scheduling + DCF", and the "Single-class fair scheduling + DCF with threshold for controlled load service" are proposed in the paper to manage the traffic within a piconet. Moreover, a measurement based admission control algorithm is proposed to guarantee the QoS requirements for the requests. We compare the performance of the proposed access mechanisms by conducting simulations. The simulation results show that the "Multi-classes fair scheduling" mechanism is the best choice for the networks occupied by the real-time service;the "Single-class fair scheduling + DCF with threshold for controlled service" mechanism is the best for controlled service in general case. © 2005 IEEE.

关键词： Mobile computing

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A new program in information technology

A new program in information technology

引用

international conference on information technology - coding and computing

作者： Hughes, CE Marin, GA Univ Cent Florida Sch Elect Engn & Comp Sci Orlando FL 32816 USA

ISBN: (纸本)0769519164

This paper describes the motivation, development and current status of the information technology Bachelor of Science degree program at the University of Central Florida. Our goal is to provide our particular point of view on what should comprise an IT degree and thereby to elicit open dialogue with others who may have similar or even completely differing points of view.

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Distributed knowledge management for autonomous access control in computer networks

Distributed knowledge management for autonomous access contr...

引用

international conference on information technology - coding and computing

作者： Seleznyov, A Hailes, S UCL Dept Comp Sci London WC1E 6BT England

ISBN: (纸本)0769521088

This work discusses a conceptual model for automatic acquisition and processing of knowledge about users and devices in computer networks. It employs autonomous agents for distributed knowledge management and integrates them into an autonomic middleware component. Agents grouped into distributed communities act as mediators between users, devices, and network resources. Communicating between each other they make decisions on whether a certain user or device can be given access to a requested resource. In other words, agents in our system perform user/device authentication, authorisation, and maintenance of user credentials.

关键词： trust access control knowledge management autonomous agents autonomic computing middleware pervasive computing

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Automatic query expansion based on directed divergence

Automatic query expansion based on directed divergence

引用

3rd international conference on information technology: coding and computing (itcc 2002)

作者： Cai, D van Rijsbergen, CJ Univ Glasgow Glasgow G12 8QQ Lanark Scotland

ISBN: (纸本)0769515061;076951507X

To extract informative terms through known relevance information for query expansion is an important issue in the design of an effective text retrieval system. Various discriminant functions have been developed as a device for eliciting good terms. In this paper the notion of informativeness of terms is interpreted and discriminant functions are formalised both based on information-theoretic ideas for auromatic query expansion. Preliminary, results show that the approach adopted in this paper is worthy of continued investigation.

关键词： Data mining Feedback Frequency measurement information retrieval information theory Mathematical model Power measurement Power system modeling Probability

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coding k-ary trees for efficient loopless generation in lexicographic order

Coding <i>k</i>-ary trees for efficient loopless generation ...

引用

3rd international conference on information technology: coding and computing (itcc 2002)

作者： Xiang, LM Ushijima, K Asahiro, Y Kyushu Sangyo Univ Dept Informat Sci Higashi Ku Fukuoka 8138503 Japan

ISBN: (纸本)076951507X

In this paper, e-words are used for coding k-ary trees with n internal nodes. The properties of e-words are discussed in depth, such as the necessary and sufficient condition of e-words, and based on the properties, a loopless algorithm is obtained to generate e-words for k-ary trees in lexicographic order, which is more efficient in both space and time than the previous algorithm. In addition, e-words can also be easily generated in lexicographic order by a recursive algorithm, and in the order with the Strong Minimal Change Property (SMCP) by a loopless algorithm.

关键词： coding k-ary trees loopless generation lexicographic order

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Improved rate control for Advanced Video coding (AVC) standard under low delay constraint

Improved rate control for Advanced Video Coding (AVC) standa...

引用

international conference on information technology - coding and computing

作者： Navakitkanok, P Aramvith, S Chulalongkorn Univ Dept Elect Engn Digital Signal Proc Lab Bangkok Thailand

ISBN: (纸本)0769521088

The upcoming H.264/MPEG-4 Advanced Video coding (AVC) video compression standard promises a significant improvement over all previous video compression standards. In this paper, we study the impact of low delay constraint on the rate control algorithm proposed for AVC, and show that the performance of AVC rate control is degraded under such low delay constraint. This results in PSNR degradation and many skipped frames. We then propose an improved rate control scheme to effectively allocate the number of bits and monitor the buffer fullness. Simulation results show that our proposed rate control scheme encodes the video sequences with less frame skipping and with higher PSNR compared to rate control for AVC.

关键词： Image coding

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Extended DCEL data structure for mobile computing

Extended DCEL data structure for mobile computing

引用

international conference on information technology - coding and computing

作者： Li, JH Liang, XJ Gewali, LP Univ Nevada Sch Comp Sci Las Vegas NV 89154 USA

ISBN: (纸本)0769521088

Face routing is one of the effective techniques for constructing source destination route in mobile ad-hoc networks (MANET). Face routing can always construct path if the MANET is connected. However, face routing can generate routes with large number of hops. We propose an improved face routing algorithm that constructs shorter routes even when the route is forced to go through a face with large number of edges. We propose a new data structure ExtDCEL that can be used to represent both planar and non-planar networks. We present an implementation of several location based routing algorithms by using the proposed data structure.

关键词： Mobile computing

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