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检索条件"任意字段=5th IEEE International Conference on Distributed Computing in Sensor Systems"

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Extending k-Coverage Lifetime of Wireless sensor Networks Using Mobile sensor Nodes

Extending <i>k</i>-Coverage Lifetime of Wireless Sensor Netw...

引用

5th Annual ieee international conference on Wireless and Mobile computing, Networking and Communications

作者： Katsuma, Ryo Murata, Yoshihiro Shibata, Naoki Yasumoto, Keiichi Ito, Minoru Nara Inst Sci & Technol NAIST Grad Sch Informat Sci Nara 6300192 Japan Hiroshima City Univ Grad Sch Informat Sci Hiroshima 7313194 Japan Shiga Univ Dept Informat Proc & Management Shiga 5228522 Japan

ISBN: (纸本)9781424453337

One of the important issues in wireless sensor network (WSN) is to k-cover the target sensing field and to extend its lifetime. We propose a method to k-cover the field and maximize the WSN lifetime by moving mobile sensor nodes to appropriate positions for a WSN consisting of both static and mobile sensor nodes which periodically collect environmental information. Our target problem is NP-hard. So, we propose a genetic algorithm (GA) based scheme to find a near optimal solution in practical time. In order to speed up the calculation, we devised a method to check a sufficient condition of k-coverage of the field. For the problem that nodes near the sink node have to forward the data from farther nodes, we make a tree where the amount of communication traffic is balanced among all nodes, and add this tree to the initial candidate solutions of our GA-based algorithm. through computer simulations, we confirmed that our method achieves much longer k-coverage lifetime than conventional methods for 100 to 300 node WSNs.

关键词： sensor nodes

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A Note on the Study of Bluetooth Networks' distributed Algorithms

A Note on the Study of Bluetooth Networks' Distributed Algor...

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6th international conference on Mobile Adhoc and sensor systems

作者： Jedda, Ahmed Zaguia, Nejib Jourdan, Guy-Vincent Univ Ottawa Ottawa ON K1N 6N5 Canada

ISBN: (纸本)9781424451142

Bluetooth has provided many features that enable wireless ad-hoc networks, but it has also introduced many problems. the root cause of these problems lies in its communication mechanisms. We argue in this paper that the models that have been used to study distributed algorithms on Bluetooth networks do not adequately model these networks in most cases, and were often oversimplified. this is mainly due to how the many restrictions that the Bluetooth specifications impose on such networks are taken into account, and the lack of "shared knowledge" of these restrictions among the researchers of this field. We give some examples to back our argument. We give also some suggestions and proposals to overcome these issues.

关键词： Bluetooth

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Pushing sensor Network Computation to the Edge

Pushing Sensor Network Computation to the Edge

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5th international conference on Wireless Communications, Networking and Mobile computing

作者： Jean, Evens Collins, Robert T. Hurson, Ali R. Sedigh, Sahra Jiao, Yu Penn State Univ University Pk PA 16802 USA Missouri Univ Sci & Technol Dept Comp Sci Rolla MO 65409 USA Oak Ridge Natl Lab Computat Sci & Engn Div Oak Ridge TN 37831 USA

ISBN: (纸本)9781424436927

sensor Networks consist of multiple devices equipped with some sensing apparatus. the devices in the network may be homogeneous or heterogeneous, yet they will coordinate in order to accomplish a pre-defined task. With the rising interest in the use of sensor Networks in various applications, the sensor nodes need to subsist in a dynamic environment and react in a timely fashion to environmental stimuli. Unfortunately, the current paradigm in sensor Network relies on static tasking of the nodes to support a common task;which ultimately leads to deployment of various networks to cover a common area so long as the tasks and owners of these networks differ. Straying away from this paradigm, our work introduces a framework to enable nodes to support dynamic tasking in a dynamic environment by pushing computation to the edge through FPGA-based reconfigurable nodes with increased processing power. Furthermore, we contend that the sensing apparatus available on the nodes limits the range of applications that such nodes will support. As such, reconfigurability of the nodes can yield the most efficient and responsive hardware implementation of algorithms to support common tasks of applications. the benefits of our approach are highlighted through the introduction of a target-tracking node that is reconfigurable and provides increased response time to stimuli.

关键词： sensor nodes

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A generic transaction model for ForCES-based distributed systems

A generic transaction model for ForCES-based distributed sys...

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NCM 2009 - 5th international Joint conference on Int. Conf. on Networked computing, Int. Conf. on Advanced Information Management and Service, and Int. Conf. on Digital Content, Multimedia Technology and its Applications

作者： Xintao, Liao Ligang, Dong Chuanhuang, Li College of Information and Electronic Engineering Zhejiang Gongshang University No.18 Xuezheng Str. Xiasha University Town Hangzhou 310018 China

ISBN: (纸本)9780769537696

Transaction operations are supposed to be supported in ForCES-based distributed systems (FDS). In this paper, we propose a generic transaction model in the light of the characteristics of transaction process in the FDS. the model is a practical and adaptive nested transaction model that extends more support for interoperable transactions and flexible transactions. To ensure the commonality and compatibility of FDS, we consider each Forwarding Elements (FE) as a black box with an exception that it supports the well-known transaction protocol defined in the ForCES protocol. In our model, an interoperable or a flexible ForCES transaction is decomposed into subtransactions with corresponding dependency relations among them. Each subtransaction is a basic transaction that can be supported by the transaction protocol without any private extension. We propose a binary tree model to denote a ForCES transaction, and the transaction execution order of a successful commit is definite with the aid of the transaction B-tree. We also analyze some relative issues, such as how to ensure ACID properties, and presents methods to achieve global serializability and to enhance the efficiency of transaction execution. © 2009 ieee.

关键词： Binary trees

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Design of New Power Management System in Wireless sensor Network

Design of New Power Management System in Wireless Sensor Net...

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5th international conference on Wireless Communications, Networking and Mobile computing

作者： Zhao Qinghua Li Hua Wei Zhang Li Hongyan Taiyuan Univ Technol Coll Informat Engn Taiyuan 030024 Peoples R China Taiyuan Univ Technol Coll Chem & Chem Engn Taiyuan 030024 Peoples R China

ISBN: (纸本)9781424436927

A new power management circuit which includes energy conversion sub-system (photovoltaic battery),energy storage sub-system(lithium-ion battery+ultracapacitor energy conversion sub-system) and power management sub-system is designed. the power management circuit provides electricity to the wireless sensor node. the energy conversion sub-system adopts four solar photovoltaic batteries to capture energy from the enviornment. One of the solar photovoltaic batteries is installed above the packaged wireless sensor node, the others are installed on the three sides. Experimented under standard sunlight, it is tested that the V-T curve and I-T curve of lithium-ion battery and wireless sensor node and the response curve of sunshine change and that of loaded power pulse of the energy management system. As can be seen clearly, in the energy mangement system where the lithium-ion battery-ultracapacitor hybrid energy storage technology is applied, the charge/discharge procedure of the lithium-ion battery gets remarkably optimization due to ultracapacitor's filtering function, so as to slow its aging course.. Besides, despite the change of voltage upon lithium-ion battery, the wireless sensor node can work steadily as realizing its continous working. thus, the rationality of power management system is proved.

关键词： energy harvesting wireless sensor node energy management photovoltaic battery

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the NS2-based Simulation and Research on Wireless sensor Network Route Protocol

The NS2-based Simulation and Research on Wireless Sensor Net...

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5th international conference on Wireless Communications, Networking and Mobile computing

作者： Zhang, Junguo Li, Wenbin Cui, Dongxu Zhao, Xueliang Yin, Zhongxing Beijing Forestry Univ Beijing Peoples R China

ISBN: (纸本)9781424436927

Precision agriculture is the frontier of international contemporary agriculture in the twentieth century. the development of precision agriculture is a significant strategic choice of agriculture and agricultural science development in the new stage in China. As a novel technology of information acquisition and processing, WSN possesses a great strategic meaning in overall improving the modernize level of precision agriculture. Routing protocol is an indispensable part which ensures the normal operation of Wireless sensor Network and the high efficient transmission of information. the existing routing protocols for Wireless sensor Network are classified in this paper, while comparison and analysis research are also given on route structure, energy consumption, robustness, expansibility, node mobility, data fusion technology, whether QoS is supported and maximizing the network lifecycle of all kinds of routing protocols. At the end of this paper, a simulation research is made with NS2 network simulation software on the dynamic clustering process of LEACH protocols, which is a typical WSN routing protocol. the simulation results show that the random cluster-head selecting method in LEACH protocol cannot ensure the number of cluster heads completely equal to the anticipant optimal one during the dynamic clustering process, and it also exists that the distances between cluster heads are too close or sensors of some regions are too far from their cluster heads. All above these situations cause the decreasing of LEACH protocol's performance.

关键词： Wireless sensor Network Routing Protocols LEACH protocols NS2 Simulation

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D-bridge: A platform for developing low-cost WSN product solutions

D-bridge: A platform for developing low-cost WSN product sol...

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6th international conference on Networked Sensing systems, INSS2009

作者： Gordon, Dawud Beigl, Michael Distributed and Ubiquitous Computing Technical University of Braunschweig Germany

ISBN: (纸本)9781424463145

Today the construction of wireless sensing systems requires the use of rather high-priced pieces of hardware and the assembly of these hardware parts (wireless transmission core, sensor module, gateway device), as well as the implementation of the according software (sensor mote software, gateway software, end user software). this makes overall development and the thereby resulting product costly in terms of both time and money. With the D-Bridge concept that we present in this paper we will show an approach that is much cheaper than any other solution in terms of hardware and development costs. this D-Bridge is a combination of a gateway between the wireless sensor network and the IP network which also includes a Web-based application server at the wireless sensor network appliance's location. ©2009 ieee.

关键词： sensor nodes

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distributed Optical Fibre Smart sensors for Structural Health Monitoring: A Smart Transducer Interface Module

Distributed Optical Fibre Smart Sensors for Structural Healt...

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5th international conference on Intelligent sensors, sensor Networks and Information Processing (ISSNIP 2009)

作者： Wild, Graham Hinckley, Steven Edith Cowan Univ Opt Res Lab Ctr Commun Engn Res Joondalup WA 6027 Australia

ISBN: (纸本)9781424435173

In this paper, we present a Smart Transducer Interface Module (STIM) for distributed optical fibre smart sensors. the STEM is a general purpose interface that has been designed to be used with intensiometric optical fibre sensors. the interface is made up of 2 optical fibre PIN receivers, a differential amplifier and a digital signal processor. the two received signals are differentially amplified to increase sensitivity and the signal-to-noise ratio. A DSP evaluation board is used as the intelligence of the STIM, which has onboard ADC. the STIM was successfully used as an embedded system monitoring both temperature and strain, and to simply switch on the onboard LED when these measurands exceeded a predetermined threshold value. the sensing system, without the DSP, was also used to successfully detect dynamic strain signals. We also present the future directions for work on distributed optical fibre smart sensors.

关键词： Differential amplifiers

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Jobs Run-Time Scheduling in a Java Based Grid Architecture

Jobs Run-Time Scheduling in a Java Based Grid Architecture

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5th international conference on Intelligent computing

作者： Guaragnella, Cataldo Guerriero, Andrea Pasquale, Ciriaco C. Ragni, Francesco Politecn Bari Bari Italy

ISBN: (纸本)9783642040696

Grid computing provides infrastructure for solving distributed problem by sharing, selection and aggregation of distributed resources at runtime depending on their availability, performance, cost and user's quality of service requirements. Utilization of this powerful technology is mainly conditioned by tricky management of different architectures and environments and by the difficulty to identify an efficient resource selection to map tasks into grid resources that dynamically vary their features. Resources selection needs of intelligence based automatic workflow generation to predict optimal run-time jobs allocation. In this paper we propose a dynamic job run-time scheduling system based on Java and fuzzy technology to manage Grid resources and minimize human interaction in scheduling grid jobs.

关键词： distributed computing grid fuzzy-clustering similarity measurement

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Design of temperature sensor on LM75

Design of temperature sensor on LM75

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2009 5th international conference on MEMS NANO, and Smart systems, ICMENS 2009

作者： Yue, Xue Jun Key Laboratory of Key Technology on Agricultural Machine and Equipment South China Agricultural University Ministry of Education Guangzhou 510642 China College of Engineering South China Agricultural University Guangzhou 510642 China

ISBN: (纸本)9780769539386

this paper takes LM75 temperature sensor for example to expound how this system realizes the monitoring and control of substrate temperature. It makes a brief description of the system diagram of temperature sensor module first and then takes LM75 temperature sensor for example to introduce the classification and threshold of sensors and the configuration of relevant information in SDR;after that, it makes a brief introduction to I2C protocol and realizes the access to temperature sensor through I2C interface;and finally, it makes a brief explanation of the performance test of this module. © 2009 ieee.

关键词： Temperature sensors

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