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检索条件"任意字段=3rd IEEE International Conference on Distributed Computing in Sensor Systems"

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A High Accuracy Signal Conditioning Method and sensor Calibration System for Wireless sensor in Automotive Tire Pressure Monitoring System

A High Accuracy Signal Conditioning Method and Sensor Calibr...

引用

3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Leng, Yi Zhao, Genbao Li, Qingxia Sun, Chunyu Liu, Sheng Huazhong Univ Sci & Technol Dept Elect & Informat Wuhan 430074 Peoples R China Chery Automobile Co Ltd CERI Elect & Elect Dept Wuhan 241009 Peoples R China Shanghai FineMEMS Inc Shanghai 201203 Peoples R China AFRA Wuhan 430019 Peoples R China

ISBN: (纸本)9781424413119

Tire Pressure Monitoring System (TPMS) is used to detect when one or more of the vehicle's tires is 25 percent or more below the manufacturer's recommended inflation pressure. A TPMS system consists of four wireless sensors, a high frequency (HF) antenna and a central receiver. In this paper, a high accuracy sensor incorporated with a sensor signal conditioning chip is presented. A new TPMS wireless signal conditioning method for automotive applications is developed. The signal conditioning method consists of a signal conditioning chip and a calibration algorithm. The calibration algorithm has been established by relating to measured voltage, temperature and pressure ADC reading at three different temperature ranges. Twenty-five relating coefficients are obtained from characterization test before sensor signal conditioning is applied to TPMS wireless sensor calibration. The test results show that the signal conditioning method provides higher accuracy performance for wireless sensor within a battery supply voltage range from 2.1V to 3.6 V and a temperature range from -40 degrees C to 125 degrees C. The signal conditioning method also reduces the cost of wireless sensor. Moreover, a presented sensor calibration system helps to improve production efficiency and lower production costs.

关键词： wireless sensor pressure sensor signal conditioning calibration algorithm sensor calibration system

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Reservation-based data flow scheduling in distributed control applications

Reservation-based data flow scheduling in distributed contro...

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3rd international conference on Networking and Services, ICNS 2007

作者： Hangan, Anca Marfievici, Ramona Sebestyen, Gheorghe Department of Computer Science Technical University of Cluj-Napoca Faculty of Automation and Computer Science Cluj-Napoca Romania

Remote process control and supervision applications developed over the Internet require special communication models and techniques, which can guarantee the real-time and safety restrictions inherent to automation systems. This paper presents a communication model based on data flow analysis and bandwidth reservation that offers a good control over the transmission time of critical data. As part of the model, an analytical method is proposed that allows apriory evaluation of the required minimum bandwidth necessary to assure the fulfillment of real-time transmission restrictions. The model is based on the QoS facilities offered by the IPv6 protocol. © 2007 ieee.

关键词： Data flow analysis

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Dynamic energy management with improved particle filter prediction in wireless sensor networks 1

引用

3rd international conference on Intelligent computing

作者： Wang, Xue Ma, Junjie Wang, Sheng Bi, Daowei Tsinghua Univ Dept Precis Instruments State Key Lab Precis Measurement Technol & Instru Beijing 100084 Peoples R China

ISBN: (数字)9783540741718

ISBN: (纸本)9783540741701

Energy efficiency is a primary problem in wireless sensor networks which employ a large number of intelligent sensor nodes to accomplish complicated tasks. Focused on the energy consumption problem in target tracking applications, this paper proposes a dynamic energy management mechanism with an improved particle filter prediction in wireless sensor networks. The standard particle filter is improved by combining the radial-basis function network to construct the process model and the novel algorithm is adopted to predict the prior position of target. For dynamic awakening, the idle interval of each sensor node is estimated according to its sensing tasks. A cluster head rotating approach is introduced from low-energy adaptive clustering hierarchy for collecting data through the large sensing field. A group of sensor nodes which are located in the vicinity of target will wake up and have the opportunity to report their data. distributed genetic algorithm is performed on cluster heads to optimize the sensor node selection. In target tracking simulations, we verify that the improved particle filter has more robustness than standard particle filter against the sensing error and dynamic energy management enhances energy efficiency of wireless sensor networks.

关键词： Wireless sensor networks

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CIVIC : an Power- and Context- Aware Routing Protocol for Wireless sensor Networks

CIVIC : an Power- and Context- Aware Routing Protocol for Wi...

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3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Zhou, Hai-Ying Hou, Kun-Mean Harbin Inst Technol Sch Comp Sci & Technol Harbin 150006 Peoples R China Univ Blaise Pascal Clermont Ferrand II CNRS UMR 6158 LIMOS Lab Clermont Ferrand France

ISBN: (纸本)9781424413119

Wireless sensor network presents a self-organizing, wireless, ad hoe communication network that trades lower data throughput and higher message latency for lower cost and lower power drain. Conventional wireless routing protocols generally cannot satisfy the particular requirements of WSN applications to build reliable and efficient communication links. CIVIC is a location-based hybrid routing protocol (proactive and reactive). This protocol is basing upon two mechanisms: FFCCC and DANKAB. The former provides a power-aware minimal distance competitive mechanism to select a best effective node for data forwarding. The latter adopts a directional area neighbor knowledge adaptive broadcast policy to constrain the number of transferring nodes. CIVIC is also a context-aware and security consideration protocol. Messages are classified into different security and priority levels according to data context. Furthermore, meta codebook technique is adopted to decrease network traffic and improve system security. In present, CIVIC has been simulated on NS2, evaluated on hardware platforms.

关键词： WSN power- and context- aware FFCCC DANKAB

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A WSN system architecture to capture context information for beyond 3G communication systems

A WSN system architecture to capture context information for...

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3rd Intelligent sensors, sensor Networks and Information Processing conference

作者： Gluhak, Alexander Schott, Wolfgang Univ Surrey Ctr Commun Syst Res Guildford GU2 7XH Surrey England IBM Res GmbH Zurich Res Lab Zurich Switzerland

ISBN: (纸本)9781424415014

To enable new context-aware applications and services in future communication systems, wireless sensor networks (WSNs) are required to capture the context surrounding the service user and service related objects. This paper introduces a novel configurable architecture for a WSN system that is able to deliver context information from the sensors to the user in different application environments, and allows its efficient integration into third generation (3G) mobile communication systems in particular into the IP multimedia subsystem (IMS). The proposed architecture offers significant advantages compared to the ZigBee architecture.

关键词： Wireless sensor networks

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Optimizing description logics reasoning for the semantic-based Grid repositories

Optimizing description logics reasoning for the semantic-bas...

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3rd international conference on Semantics, Knowledge, and Grid, SKG 2007

作者： Babik, Marian Hluchy, Ladislav Department of Parallel and Distributed Computing Institute of Informatics Slovak Academy of Sciences Bratislava Slovakia

ISBN: (纸本)0769530079

The Semantic Grid is a recent initiative to expose semantically rich information associated with Grid resources to build more intelligent Grid services. Recently, several projects have embraced this vision and there are several successful applications that combine the strengths of the Grid and of semantic technologies. However, Semantic Grid still lacks a technology, which would provide the needed scalability and integration with existing infrastructure. In this paper we present our on-going work on a semantic grid repository, which is capable of addressing complex schemas and answer queries over ontologies with large number of instances. We present the details of our approach and describe the underlying architecture of the system. We conclude with a performance evaluation, which compares the current state-of-the-art reasoners with our system. © 2007 ieee.

关键词： Query processing

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Improved algorithms for data-gathering time in sensor networks II: Ring, tree and grid topologies

Improved algorithms for data-gathering time in sensor networ...

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3rd international conference on Networking and Services, ICNS 2007

作者： Revah, Yoram Segal, Michael Communication Systems Engineering Department Ben-Gurion University of the Negev Beer-Sheva 84105 Israel Communication Systems Engineering Department Ben-Gurion University of the Negev Beer-Sheva 8410 Israel

We address the problem of gathering information in sensor webs consisting of sensors nodes, where in a round of communication sensor nodes have messages to be sent to a distant central node (called the base station) over shortest path. There is a wide range of data gathering applications like: target and hazard detection, environmental monitoring, battlefield surveillance, etc. Consequently, efficient data collection solutions are needed to improve the performance of the network. In this paper, we take into account the fact that interference can occurs at the reception of a message at the receiver sensor. In order to save redundant retransmissions and energy, we assume a known distribution of sources (each node wants to transmit at most one packet) and one common destination. We provide a number of scheduling algorithms jointly minimizing both the completion time and the average packet delivery time. We define our network model using directional antennas and consider Ring, Tree, and Grid Network (and its generality) topologies. All our algorithms run in low-polynomial time. © 2007 ieee.

关键词： sensor nodes

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A distributed education-support PSE system

A distributed education-support PSE system

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3rd ieee international conference on e-Science and Grid computing

作者： Teramoto, Takayuki Okada, Tadashi Kawata, Shigeo Tsuyama Natl Coll Technol Dept Elect & Comp Engn Numa 624-1 Tsuyama 7088509 Japan Utsunomiya Univ Grad Sch Engn Utsunomiya Tochigi Japan

ISBN: (纸本)9780769530642

Network-based learning or e-Learning has been taking an important role in education as helpful education tools. However, it is difficult for teachers to retrieve education data from students or to obtain data from the student activities. Therefore, we have developed a problem solving environment (PSE) for the education and learning support: TSUNA-TASTE.[1] The TSUNA-TASTE system collects the system-usage situation, the information for the windows used and the operation situation of the mouse and key board of all students. The data, which the system TSUNA-TASTE collects, are stored in a database on the TSUNA-TASTE system server. In this paper we present the structure of the TSUNA-TASTE system and detail structure of the network in the TSUNA-TASTE. The TSUNA-TASTE supports teachers and students in computer-based education. The TSUNA-TASTE may open a new helpful e-Learning world.

关键词： Students

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Model-driven simulation of grid scheduling strategies

Model-driven simulation of grid scheduling strategies

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3rd ieee international conference on e-Science and Grid computing

作者： Li, Hui Buyya, Rajkumar Leiden Univ Leiden Inst Adv Comp Sci POB 9512 NL-2333 CA Leiden Netherlands Univ Melbourne Dept CSSE Grid Comp & Distributed Syst Lab Melbourne Vic 3010 Australia

ISBN: (纸本)9780769530642

Simulation studies of Grid scheduling strategies require representative workloads to produce dependable results. Real production Grid workloads have shown diverse correlation structures and scaling behavior, which are different than the characteristics of the available supercomputer workloads and cannot be captured by Poisson or simple distribution-based models. We present models that are able to reproduce various correlation structures, including pseudo-periodicity and long range dependence. By conducting model-driven simulation, we quantitatively evaluate the performance impacts of workload correlations in Grid scheduling. The results indicate that autocorrelations in workloads result in worse system performance, both at the local and the Grid level. It is shown that realistic workload modeling is not only possible, but also necessary to enable dependable Grid scheduling studies.

关键词： Supercomputers

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Energy-efficient pattern recognition approach for wireless sensor networks

Energy-efficient pattern recognition approach for wireless s...

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3rd Intelligent sensors, sensor Networks and Information Processing conference

作者： Baqer, M. Khan, A. I. Monash Univ Clayton Sch Informat Technol Clayton Vic 3168 Australia

ISBN: (纸本)9781424415014

Event detection and monitoring is an important application class for wireless sensor networks. Traditionally, sensory data are collected and processed at the base-station. Conveying large amounts of multidimensional sensory data is however impractical in resource-constrained sensor networks. In this paper we propose to convert event detection into pattern recognition that is particularly suited for sensor networks. Individual sensory measurements of sensor nodes are integrated into high-level event pattern, and used for recovering the state of the monitored environment. The pattern storage and pattern recognition operations are performed in a distributed manner within the network. Furthermore, a sleep mode strategy is incorporated for improving performance and prolonging the lifetime of the sensor network.

关键词： Pattern recognition

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