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检索条件"任意字段=3rd International Symposium on Information Processing in Sensor Networks"

共 1449 条记录，以下是681-690 订阅

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Implementation of spectrum sensing on wireless open-access research platform

Implementation of spectrum sensing on wireless open-access r...

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international symposium on Applied Sciences on Biomedical and Communication Technologies, ISABEL

作者： Tuomo Hänninen Johanna Vartiainen Markku Juntti Matti Raustia University of Oulu Centre for Wireless Communications (CWC) University of Oulu FINLAND

Opportunistic spectrum usage is one application of the so called cognitive communication systems that enables efficient spectrum usage in future wireless communication systems. One of the key features in opportunistic spectrum usage is a spectrum opportunity estimation method. Energy detection has the benefit that knowledge about the licensed users is not required. In this paper, energy detection method called the localization algorithm based on double-thresholding (LAD) is implemented on the wireless open-access research platform (WARP). The simulation measurements proved that the implementation was done correctly. Results included important information of consumed FPGA resources and processing latencies for the LAD method implementation.

关键词： Field programmable gate arrays sensors Signal to noise ratio Sorting Wireless communication Clocks Wireless sensor networks

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Data processing for posturography and gait analysis

Data processing for posturography and gait analysis

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international symposium on Electrical and Electronics Engineering (ISEEE)

作者： Marius Hagan Horia-Nicolai Teodorescu Adriana Sîrbu Gheorghe Asachi Technical University of Iasi Iasi Romania

The aim of this study is to develop a system for extracting information during postural stability tests, using a new capacitive force sensor conceived and made by us. Based on the capacitive force sensor, we developed a pedometric force plate (PFP) for use in human postural and gait analysis. We present the method of data acquisition, the signal processing and the results obtained. For determining a relationship between the force signal parameters (spectrum, COP (Center of Pressure) trajectories) and subjects' postural behavior, six healthy persons were tested. The Fourier spectra were determined for every force sensor and for the COP. Also, the gait line was determined for three subjects who achieved a short walk before the postural test.

关键词： Foot Force sensors Leg Force Trajectory Stability analysis

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Monitoring data quality in Kepler 10

Monitoring data quality in Kepler

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Proceedings of the 19th ACM international symposium on High Performance Distributed Computing

作者： Nai'm, Aisa Crawl, Daniel Indrawan, Maria Altintas, Ilkay Sun, Shulei Faculty of Information Technology Monash University 900 Dandenong Rd. Caulfield East Australia San Diego Supercomputer Centre 10100 John J Hopkins Dr. San Diego CA 92037 United States Center for Research in Biological Systems University of California San Diego United States

ISBN: (纸本)9781605589428

Data quality is an important component of modern scientific discovery. Many scientific discovery processes consume data from a diverse array of resources such as streaming sensor networks, web services, and databases. The validity of a scientific computation's results is highly dependent on the quality of these input data. Scientific workflow systems are being increasingly used to automate scientific computations by facilitating experiment design, data capture, integration, processing, and analysis. These workflows may execute in grid or cloud environments, and if the data produced during workflow execution is deemed unusable or low in quality, execution should stop to prevent wasting these valuable resources. We propose an approach in the Kepler scientific workflow system for monitoring data quality and demonstrate its use for oceanography and bioinformatics domains. Copyright 2010 ACM.

关键词： Grid computing

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Vision mesh: A novel video sensor networks platform for water conservancy engineering

Vision mesh: A novel video sensor networks platform for wate...

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international Conference on Computer Science and information Technology (CSIT)

作者： Meiyan Zhang Wenyu Cai Department of Electrical Engineering Zhejiang Water-Conservancy and Hydropower College Hangzhou China School of Electronics & Information Hangzhou Dianzi University Hangzhou China

Video is an important medium for the observation of a variety of phenomena in the physical world such as for water conservancy engineering. Video sensor networks (VSN) consists of a large number of sensor nodes with cheap CMOS cameras, therefore, it has the ability of large scale visual monitoring. However, a kind of powerful and scalable platform is urgent for simulation and development of VSN. This paper proposed a novel and scalable video sensor networks platform named as Vision Mesh for water conservancy engineering. Vision Mesh is composed of a mass of image or video sensor nodes - Vision Motes, with which multi-view image or video information of FOV (Field of View) can be acquired simply. Vision Mote is built with Atmel ARM9 CPU and operated on Linux operating system, with TI CC2430 Zigbee module taken as wireless transceiver. Furthermore, OpenCV machine vision lib is migrated to Vision Mesh platform so as to improve video processing ability, therefore, Vision Mesh has the ability of image and video processing and is of strong scalability to extend performance. In this paper, we provide an overview of Vision Mesh architecture and provide an insightful platform for VSN.

关键词： Cameras Monitoring Image color analysis SDRAM Image coding Educational institutions

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Model reference adaptive neural network control for a class of switched nonlinear singular systems

Model reference adaptive neural network control for a class ...

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international symposium on Systems and Control in Aerospace and Astronautics (ISSCAA)

作者： Xin Chen Fei Long Zhumu Fu Institute of Intelligent Information Processing Department of Mathematics College of Science Guizhou University Guiyang Guizhou China Institute of Intelligent Information Processing College of Computer Science and Information Guizhou University Guiyang Guizhou China Electronic Information Engineering College Henan University of Science and Technology Luoyang China

ISBN: (纸本)9781424460434

In this paper, we address the reference model adaptive neural network control problem for a class of switched nonlinear singular systems under the case of single input and multiple inputs. Based on RBF neural network, the state tracking controller and a switching strategy are designed so that switched nonlinear singular system can asymptotically track the desired reference model. It shows that RBF neural network are used to approximate the positive nonlinear unknown function. The approximation errors of the RBF neural networks are introduced to the adaptive law in order to improve the performance of the whole systems. A simulation example is performed in support of the proposed neural control scheme.

关键词： Switches Artificial neural networks Adaptive systems Adaptation model Approximation methods Equations

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Contention-based georouting with guaranteed delivery, minimal communication overhead, and shorter paths in wireless sensor networks

Contention-based georouting with guaranteed delivery, minima...

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24th IEEE international Parallel and Distributed processing symposium, IPDPS 2010

作者： Rührup, Stefan Stojmenović, Ivan OFFIS Institute for Information Technology Oldenburg Germany School of Information Technology and Engineering University of Ottawa Canada

ISBN: (纸本)9781424464432

Nodes in contention-based (beaconless) georouting forward packets towards a known destination position without the knowledge of the neighborhood. The only existing methods [17], [20] that guarantee delivery in unit disk graphs (UDG) require runtime planarization of the communication graph with either unbounded message overhead per hop while preserving the Gabriel graph property of the subgraph, or a constant overhead per hop with up to 13 control messages. In this paper we show that the next hop can be selected directly by a contention mechanism and without prior pla- narization. Existing greedy routing methods select the next hop with 3 messages using a RTS-CTS-DATA scheme in a timer- based contention where only the next hop neighbor responds. We extend this to provide also recovery from local minima with 3 messages per hop by the Rotational Sweep algorithm. We prove that our algorithm guarantees delivery in UDGs, and also yields routes that are shorter than or equal to the combined greedy and face routing with Gabriel graph planarization. Simulation results show that especially the duration of the contention process can be significantly reduced. Our algorithm can be also used for conventional beacon- based routing with guaranteed delivery without prior planarization, replacing the complicated implementation from [19] by a very simple method which evaluates angular distances to select the proper forwarding neighbor. It also provides a simple network boundary detection algorithm, with or without beacons. ©2010 IEEE.

关键词： sensor nodes

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Data integration mechanism for agent-based sensor network middleware

Data integration mechanism for agent-based sensor network mi...

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international Conference on Advanced Computer Theory and Engineering, ICACTE

作者： Jong-Wan Yoon Byung-Hyug Lee Dong-Ryeol Shin School of Information and Communication Engineering Sungkyunkwan University Suwon South Korea

ISBN: (纸本)9781424465392

The goal of this paper is to propose a way to processing data from service providing networks using reputation mechanism to user application in agent-based network environment. In this process, it must concern about a lot of sensor network because sensor networks are quite different about data format, protocol, and so on. To alleviate this heterogeneity, we propose data integration mechanism that can convert gathered data from various data gathering network to unified data format. In the agent-based network environment consist of a number of agents and it cooperate each other for establishing their own target but it has problem about lack of reliability. To treat this problem, we propose data integration mechanism for agent-based sensor network middleware to provide enhanced data processing for user application.

关键词： XML Educational institutions

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A novel nonlinear multisensor multitarget tracking algorithm

A novel nonlinear multisensor multitarget tracking algorithm

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IET 3rd international Conference on Wireless, Mobile and Multimedia networks (ICWMNN 2010)

作者： Lin-lin Zhang Ri-jie Yang Xu-jun Guan Dept. of Electronic and Information Engineering Naval Aeronautics and Astronautics University YanTai China

A novel multisensor order statistic unscented probabilistic data association algorithm, MSOSUPDA, is proposed for the multsisensor multitarget tracking problem of nonlinear system in clutter. In the new algorithm, the problem of interest is first translated into multiple nonlinear single-sensor multitarget tracking problems, which can be dealt with sequentially. Then UKF is used for the propagation of state distribution in nonlinear system. Based on these ,the association of measurements of single sensor to tracks is implemented according to the principle of order statistics probabilistic data association (OSPDA) and the MSOSUPDA algorithm is derived. Compared with the MSJPDA/EKF, the accuracy and robustness of MSOSUPDA are improved. Furthermore, computational complexity of the proposed algorithm decreases obviously on account of the use of OSPDA. According to the simulation results, the ratio of divergence and the processing time of our proposed algorithm to those of the MSJPDA/EKF algorithm are 19 and 70 percent respectively besides more favorable accuracy.

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An method of self-learning in adaptive text information filtering

An method of self-learning in adaptive text information filt...

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international symposium on Systems and Control in Aerospace and Astronautics (ISSCAA)

作者： Ning Hui Tan Ya-zhou Lv Zhi-long Wu Yue Cui Li-gang Wang Chun-hua Computer Science and Technology College Harbin Engineering of Technology Harbin China Harbin Engineering University Harbin Heilongjiang CN

ISBN: (纸本)9781424460434

With the growing popularity of Internet and development, the amount of information on the Internet is beyond people's imagination. information filtering is searching interesting information for user and shielding other useless information in dynamic information flow based on user's need of information. In this background, information filtration comes into being and becomes a very important branch in information processing field. Because text information is one of the most important forms of Internet information, this article focuses on text filtering processing. This paper mainly searches how to build user template more precisely, the template learning algorithm in filtering processing and adaptive threshold in adaptive information filtering processing based on vector space model. Adaptive learning is fulfilled through genetic optimization of feedback information. Updating user templates by data gained by adaptive learning helps adaptive filtering. According to the experimental result, this method has shielded the information sparsely of the pseudo-relevance feedback and the misleading of the feature ambiguity effectively to improve the filtering quality of the adaptive information filtering system.

关键词： Mobile communication Artificial neural networks Feeds Computers Filtration

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The cross-layer adaptation of TCP-Friendly rate control to 3G wireless links

The cross-layer adaptation of TCP-Friendly rate control to 3...

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2010 7th international symposium on Communication Systems, networks and Digital Signal processing, CSNDSP 2010

作者： Jung, Il Mo Karayiannis, Nicolaos B. Pei, Steven Benhaddou, Driss Dept. of Electrical and Computer Engineering University of Houston Houston TX 77204 United States

ISBN: (纸本)9781861353696

Existing transmission control protocol (TCP) and TCP-Friendly flows suffer from unpredictable losses and delay over wireless links because such factors may cause sending rate throttling and lower the reactivity of transmission control. This paper presents a cross-layer approach to adapt TCP-Friendly rate control (TFRC) to these two factors of 3-rd generation (3G) wireless links. For effective adaptation, we classify the causes of packet losses and delay observed in transport layer as: Capacity-related and Erroneous-channel-related, and recognize them by using layer 2 automatic repeat-request (ARQ) information. The proposed approach takes into account hybrid ARQ (HARQ), adaptive modulation and coding (AMC), and layer 2 ARQ and is simulated over the high-speed downlink packet access (HSDPA) links. Simulation results show that our approach outperform the standard TFRC and one other improved TFRC scheme. Besides, it is shown that erroneous-channel-related delay adaptation makes it possible to increase the throughput of TFRC effectively even in cases where no erroneous-channel-related loss occurs. © 2010 IEEE.

关键词： Transmission control protocol

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