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Journal of Software 2009年第8期4卷 899-906页

作者： Zhang, Shu-Kui Gong, Sheng-Rong Cui, Zhi-Ming Liu, Quan Fan, Jian-Xi School of Computer Science and Technology Soochow University Suzhou 215006 China JiangSu Province Support Software Engineering R and D Center Modern Information Technology Application in Enterprise Suzhou 215104 China

Collecting data with confidence of the environment is an important application of the wireless sensor networks (WSN). In this study, we used a splay tree based event region fault-tolerant detection algorithm (STERD) for WSNs to address these problems. Rather than passing large quantities of raw data through the network, our network instead sends the coefficients of a regression polynomial that simulates the readings of the sensor nodes throughout the region of interest. These coefficients essentially summarize the relevant information over the region, in effect compressing the data, leading to a reduction in both data volume and energy expenditure. Simulation results indicate that the proposed STERD can attractively obtain the high event region detection accuracy and considerably reduce the false alarm probability. © 2009 ACADEMY PUBLISHER.

关键词： Sensor nodes

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N-order difference heuristic model of fuzzy time series forecasting

N-order difference heuristic model of fuzzy time series fore...

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IEEE International Conference on Intelligent Computing and Intelligent Systems (ICIS)

作者： Kai Chi Wen-Gang Che Pattern Recognition and Intelligent System School of Information Engineering and Automation Kunming University of Science and Technology China Key Laboratory of Computer Technology and Application of Yunnan Province Kunming University of Science and Technology China

Fuzzy time series forecasting model is an effective method to solve the nonlinear problems forecasting. However, most published fuzzy time series based models did not count the change trend implicit in historical datum. In this paper, authors proposed a novel method which applied heuristic information to the fuzzy time series model based on Fibonacci sequence. As an example, the USD/JPY exchange rate is tested in this model. The results show that this method not only improves the forecasting accuracy, but decreases the computational complexity.

关键词： Predictive models Technology forecasting Economic forecasting Uncertainty Fuzzy systems Pattern recognition Intelligent systems Automation Channel hot electron injection Laboratories

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Efficient importance-based MAC scheduling for video streaming in Bluetooth Piconet

Efficient importance-based MAC scheduling for video streamin...

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International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, CyberC

作者： Jianfeng Liu Guoping Liu Jinfeng Zhang Shaohua Qin Yong Du Huihua Jin School of Computer Science Beijing Aeronautics and Astronautics University Beijing China Business Application & Product Research Department China Telecom Beijing Research Institute Beijing China School of Computer Science and Information Engineering Guangxi Normal University Guilin China Beijing Transportation Information Center Beijing China

In order to provide the high quality service for transporting video streaming in the Bluetooth Piconet, in which the bandwidth is limited and the structure is heterogeneous, a MAC scheduling algorithm for video streaming in the Bluetooth Piconet is proposed. The main idea of the algorithm is to model the video streaming and calculate the importance of the packet relative to the video quality before transporting. The packet on the transportation is scheduled by the importance in the MAC layer to attain the maximum perceived quality of the overall Slaves in the Piconet. The simulation shows that the proposed algorithm can assign the network resource more efficiently, and improve the perceived video quality of the Slaves in the Piconet more significantly in contrast with the other algorithms.

关键词： Streaming media Bluetooth Personal area networks Master-slave Traffic control computer science Transportation Bandwidth Ad hoc networks Round robin

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Research on the method of entity homepage recognition

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Journal of Computational Information Systems 2009年第6期5卷 1617-1624页

作者： Li, Lina Yu, Zhengtao Zou, Junjie Su, Lei Xian, Yantuan Mao, Cunli The School of Information Engineering and Automation Kunming University of Science and Technology Kunming 650051 China The Institute of Intelligent Information Processing Computer Technology Application Key Laboratory of Yunnan Province Kunming 650051 China School of Software Yunnan University Kunming 650091 China

Entity Homepage Recognition(EHR) is an important part of entity finding. In this paper, a method of EHR based on AdaBoost is proposed. With the help of Google, this method recalls pages related to answer entities and recognizes to obtain the relevant entity homepage. In detail, Person, Organization and Product, three types of entities are analyzed respectively and 3148 entities and the corresponding entity homepages are collected, besides, on the basis of entity characteristic, we define the entity features related to the features of link and webpage content, as well as, these features are extracted to form a training data set;And then using different learning algorithms with different features to identify the homepage to find the most effective classification features and homepage recognition learning algorithm. Experiments were done by employing the test data set of entity task in TREC-2009 and the method of 10-fold cross validation, the results show the best effects have been achieved by adopting the method of AdaBoost, specifically, combined with the features of link and webpage content, the recognition accuracy rate for right homepage reaches 91.34%. 1553-9105/ Copyright © 2009 Binary Information Press.

关键词： Adaptive boosting

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An integrated method for GML application schema match 4th

An integrated method for GML application schema match

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4th International Conference on Intelligent Computing, ICIC 2008

作者： Li, Chao Zeng, Xiao Xiong, Zhang Computer Application Institute School of Computer Science and Engineering Beihang University 37th Xueyuan Road Haidian District Beijing100083 China

ISBN: (纸本)9783540859291

GML has been a standard in geographical information area for enhancing the interoperability of various GIS systems for data mining. In order to share geography information based on GML, problems in application schema match need to be overcome first. This paper introduces an integrated multistrategy approach on GML application schema match. It combines existing scheme match algorithm with GML3.0 application schema. Firstly, it transforms the input GML application schemas into a GSTree according to linguistic-based and constraint-based match rules. Similarity between two elements is calculated trough different rules separately, and merged into element-level similarity. Secondly, the element-level similarity is rectified by a structure-level match algorithm based on similarity flooding. Finally, the mapping table of GML application schema elements is obtained. The experiment result shows that the approach can effectively discovery the similarity of schema elements, and improve the match results with a high degree of accuracy. © Springer-Verlag Berlin Heidelberg 2008.

关键词： Interoperability

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Twice-Imaging airborne camera system with distributed sensors 21

Twice-Imaging airborne camera system with distributed sensor...

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21st Congress of the International Society for Photogrammetry and Remote Sensing, ISPRS 2008

作者： Zhao, S.H. Yan, L. Duan, X.H. Wu, Y.K. Shen, T.T. Su, M.D. Beijing Key Lab. of Spatial Information Integration and its Application Peking University Beijing100871 China School of Electronics Engineering and Computer Science Peking University Beijing China

Digital airborne cameras play a significant role for aerial Photogrammetry development from analog to full-digital age. Because of the gap between digital sensor performance and Photogrammetry request, digital airborne also becomes the bottleneck of full-digital approach. In this paper, we present a design of twice-imaging airborne camera system with distributed sensors based on film camera, and carry out optical experiments to obtain practical images, MTF (Modulation Transfer Function) and the scattering light traced by ZEMAX software. © 2008 International Society for Photogrammetry and Remote Sensing. All rights reserved.

关键词： Photogrammetry

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Temperature Drift Modeling of FOG Based on LS-WSVM

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Defence Technology（防务技术） 2008年第3期4卷 188-190页

作者：王立平孔小梅付梦印王美玲张甲文姜明 School of Information Science and Technology Beijing Institute of Technology Beijing Institute of Computer Application The Second Artillery Engineering College

Large temperature drift is an important factor for improving the performance of FOG.A trend term of temperature drift of FOG is obtained using stationary wavelets transform,and an FOG drift algorithm with least squares wavelet support vector machine(LS-WSVM) is *** algorithm used Maxihat wavelet as a kernel function of LS-WSVM to establish an FOG drift *** has better modeling precise than LS-WSVM model with Gauss *** indicate the efficiency of this algorithm of LS-WSVM.

关键词：人工智能自动推理光学陀螺仪输入设备

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A handle electrode system for measuring heart rate while riding a bicycle

A handle electrode system for measuring heart rate while rid...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Masutaka Watanabe Sosuke Tsukamoto Hiroshi Hoshino Masters Program in Electronic and Computer Engineering Graduate School of Science and Engineering Tokyo Denki University Hiki Saitama Japan School of Science and Engineering Tokyo Denki University Hiki Saitama Japan

In this paper, a handle-electrode system is proposed for obtaining the heart rate of a user while riding a bicycle. The system was designed to measure the user's heart rate by only gripping the handle of a bicycle. Three electrodes made from conductive cloth were adhered to the handle. A method detecting heart-rate from the obtained electrocardiogram was also proposed. To assess the applicability of the proposed system, a simple experiment was performed. The experiment was performed in four conditions of road surfaces; lawn, asphalt, a tiled, and an uneven road. Experimental result suggests that the proposed system can be useful for obtaining R waves while riding a bicycle.

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Two-dimensional location and direction estimating method

Two-dimensional location and direction estimating method

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Teruhiro Haga Sosuke Tsukamoto Hiroshi Hoshino Masters Program in Electronic and Computer Engineering Graduate School of Science and Engineering Tokyo Denki University Hiki Saitama Japan School of Science and Engineering Tokyo Denki University Hiki Saitama Japan

In this paper, a method of estimating both the position and the rotation angle of an object on a measurement stage was proposed. The system utilizes the radio communication technology and the directivity of an antenna. As a prototype system, a measurement stage (a circle 240mm in diameter) with 36 antennas that placed in each 10 degrees was developed. Two transmitter antennas are settled in a right angle on the stage as the target object, and the position and the rotation angle is estimated by measuring efficiency of the radio communication of each 36 antennas. The experimental result revealed that even when the estimated location is not so accurate (about a 30 mm error), the rotation angle is accurately estimated (about 2.33 degree error on average). The result suggests that the proposed method will be useful for estimating the location and the direction of an object.

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Performance and Complexity Comparison of MRC and PASTd-based Statistical Beamforming and Eigencombining

Performance and Complexity Comparison of MRC and PASTd-based...

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Asia-Pacific Conference on Communications

作者： Constantin Siriteanu Xin Guan Steven D. Blostein School of Computer Science and Engineering Seoul National University South Korea Masters student in the Digital Communications Laboratory Hanyang University South Korea Department of Electrical and Computer Engineering Queen's University Kingston Canada

Smart antennas may enhance performance by applying conventional algorithms such as maximal-ratio combining (MRC) or maximum average signal-to-noise-ratio beamforming, i.e., statistical beamforming (BF). However, MRC and BF yield advantages that offset their complexity only for extreme antenna correlation values, which seldom occur for space-limited base-station antenna arrays deployed in typical urban (TU) scenarios, with predominantly-small, random, azimuth spread (AS). Therefore, the principles of BF and MRC have been integrated to forge maximal-ratio eigencombining (MREC), which promises to reap the available array and diversity gains more effectively. Nonetheless, the relative performance and numerical complexity of MREC, BF, and MRC have not yet been investigated for channel estimated from received-signal-vector samples in a TU uplink scenario with realistic Laplacian base-station power azimuth spectrum and log-normally distributed AS with exponential temporal correlation. Therefore, herein, Yangpsilas effective and low-complexity deflation-based projection approximation subspace tracking (PASTd) algorithm is deployed to recursively update the channel eigenstructure required for MREC adapted to AS using the classical bias-variance tradeoff criterion (BVTC). Simulation results indicate that BVTC-based MREC can significantly outperform BF for much lower complexity than MRC.

关键词： Array signal processing Diversity reception Antenna arrays Azimuth Diversity methods Fading Laplace equations Signal to noise ratio Receiving antennas Degradation

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