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检索条件"任意字段=6th IEEE International Conference on Distributed Computing in Sensor Systems"

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the research of weigh-in-motion sensor layout based on data fusion

The research of weigh-in-motion sensor layout based on data ...

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6th international conference on Fuzzy systems and Knowledge Discovery, FSKD 2009

作者： Wang, Zhu Wang, Qi Hou, Jiatong School of Information Science and Engineering Harbin Institute of Technology WeiHai China Department of Automation of Testing and Control Harbin Institute of Technology Harbin China

ISBN: (纸本)9780769537351

Weigh-in-motion (WIM) is a better way that can gain the true weight of vehicle which is moving on the highway at a high speed. In this paper, the principle of piezoelectric sensor is introduced, and the WIM signal model is simplified. the application of data fusion approach is used on the basis of piezoelectric sensors, and the proper redistribution of sensors is used to gain the WIM model, then the expected value which is closer to the true axle load can be gained by the Gass-newton method. the simulation of the different speed errors when the initial phases are different according to a layout shows that the accuracy is adequate. © 2009 ieee.

关键词： Piezoelectricity

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System Level Speedup Oriented Cache Partitioning for Multi-programmed systems

System Level Speedup Oriented Cache Partitioning for Multi-p...

引用

6th IFIP international conference on Network and Parallel computing

作者： Suo, Guang Yang, Xue-jun Natl Univ Def Technol Sch Comp Natl Lab Paralleling & Distributed Proc Changsha 410073 Hunan Peoples R China

ISBN: (纸本)9781424449903

In a chip-multiprocessor with a shared cache structure, the last level cache is shared by multiple applications executing simultaneously. the competing accesses from different applications degrade the system performance, resulting in non-predicting executing time. Cache partitioning techniques partition the shared cache for multiple applications. Traditional cache partitioning mechanisms such as Utility-based Cache Partitioning (UCP) and IPC-based Cache Partitioning (IPC-CP), aim to optimize the objective (for example, instruction per cycle or miss rate) that is appealing for individual application. However, the performances of multi-programmed systems are usually characterized by the number of applications finished during certain interval. this paper investigates System Level Speedup oriented Cache Partitioning (SLS-CP), which is used to maximize total speedup of the system. Like UCP and IPC-CP, the inputs of SLS-CP are current performance status and misses of all the possible partitions, and the outputs of SLS-CP are optimum cache partitions for multiprogrammed workloads. Our evaluation, on top of a two cores CMP processor with 8 multi-programmed workloads shows that SLS-CP improves system level speedup and fairness over UP and IPC-CP.

关键词： Multiprogramming

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Using Reinforcement Learning for Multi-policy Optimization in Decentralized Autonomic systems - An Experimental Evaluation

Using Reinforcement Learning for Multi-policy Optimization i...

引用

6th international conference on Autonomic and Trusted computing

作者： Dusparic, Ivana Cahill, Vinny Univ Dublin Trinity Coll Sch Comp Sci & Stat Distributed Syst Grp Lero The Irish Software Engn Res Ctr Dublin 2 Ireland

ISBN: (纸本)9783642027031

Large-scale autonomic systems are required to self-optimize with respect to high-level policies, that can differ in terms of their priority, as well as their spatial and temporal scope. Decentralized multi-agent systems represent one approach to implementing the required self-optimization capabilities. However, the presence of multiple heterogeneous policies leads to heterogeneity of the agents that implement them. In this paper we evaluate the use of Reinforcement Learning techniques to support the self-optimization of heterogeneous agents towards multiple policies in decentralized systems. We evaluate these techniques in an Urban Traffic Control simulation and compare two approaches to supporting multiple policies. Our results suggest that approaches based on W-learning, which learn separately for each policy and then select between nominated actions based on current action importance, perform better than combining policies into a single learning process over a single state space. the results also indicate that explicitly supporting multiple policies simultaneously can improve waiting times over policies dedicated to optimizing for a single vehicle type.

关键词： Multi agent systems

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MCP: An Energy-Efficient Code Distribution Protocol for Multi-Application WSNs

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5th ieee international conference on distributed computing in sensor systems

作者： Li, Weijia Zhang, Youtao Childers, Bruce Univ Pittsburgh Dept Comp Sci Pittsburgh PA 15260 USA

ISBN: (纸本)9783642020841

In this paper, we study the code distribution problem in multi-application wireless sensor networks (MA-WSNs), i.e., sensor networks that can support multiple applications. While MA-WSNs have many advantages over traditional WSNs, they tend to require frequent code movements in the network, and thus here new challenges for designing energy efficient code dissemination protocols. We propose MCP, a stateful Multicast based Code redistribution Protocol for achieving energy efficiency. Each node in MCP maintains a small table to record the interesting information of known applications. the table enables sending out multicast-based code dissemination requests such that only a subset of neighboring sensors contribute to code dissemination. Compared to broadcasting based schemes, MCP greatly reduces signal collision and saves both the dissemination time and reduces the number of dissemination messages. Our experiments results show that MCP can reduce dissemination time by 25% and message overhead by 20% under various network settings.

关键词： Wireless sensor networks

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Almost Optimal distributed M2M Multicasting in Wireless Mesh Networks

Almost Optimal Distributed M2M Multicasting in Wireless Mesh...

引用

6th international conference on Mobile Adhoc and sensor systems

作者： Xin, Qin Manne, Fredrik Zhang, Yan Wang, Jianping Zheng, Zeyu Simula Res Lab Oslo Norway Univ Bergen Dept Informat Bergen Norway City Univ Hong Kong Dept Comp Sci Hong Kong Peoples R China

ISBN: (纸本)9781424451142

Wireless Mesh Network (WMN) is an emerging communication paradigm to enable resilient, cost-efficient and reliable services for the future-generation wireless networks. In this paper, we study the problem of multipoint-to-multipoint (M2M) multicasting in a WMN which aims to use the minimum number of time slots to exchange messages among a group of k mesh nodes in a multi-hop WMN with n mesh nodes. We study the M2M multicasting problem in a distributed environment where each participant only knows that there are k participants and it does not know who are other k - 1 participants among n mesh nodes. It is known that the computation of an optimal M2M multicasting schedule is NP-hard. We present a fully distributed deterministic algorithm for such an M2M multicasting problem and analyze its time complexity. We show that if the maximum hop distance between any two out of the k participants is d, then the studied M2M multicasting problem can be solved in time O(d log(2) n + k log(3) n/log k) with a polynomial-time computation, which is an almost optimal scheme due to the lower bound Omega(d + k log n/log k) given in [5]. Our algorithm also improves the currently test known result with running time O(d log(2) n + k log(4) n) in [13]. In this paper, we also propose a distributed deterministic algorithm which accomplishes the M2M multicasting in time O(d + k) with a polynomial-time computation in unit disk graphs. this is an asymptotically optimal algorithm in the sense that there exists a WMN topology, e.g., a line, a ring, a star or a complete graph, in which the M2M multicasting cannot be completed in less than Omega(d + k) units of time.

关键词： Broadcasting distributed Algorithms Gossiping Multicast Unit Disk Graphs Wireless Mesh Networks

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distributed traffic signal control approach based on multi-agent

Distributed traffic signal control approach based on multi-a...

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6th international conference on Fuzzy systems and Knowledge Discovery, FSKD 2009

作者： Cheng, Xiangjun Yang, Zhaoxia Traffic and Transportation School Beijing Jiaotong University Beijing China

ISBN: (纸本)9780769537351

this paper establishes a distributed and coordinated traffic signal control system based on multi-agent (DTCMAS), in which there is no control center. Each intersection is controlled by a local agent independently. In the meantime, the signal control agents improves the control effect of global network by communication and coordination among agents in adjacent intersections. Because every agent comprises knowledge-database and reasoning mechanism, the DTCMAS not only fully considers the information of fleets of cars and traffic conditions in around intersections, but also takes the realization of global optimizing for traffic control of road network into account and reduces the complexity of control algorithm greatly. the result of simulation shows that the DTCMAS signal control approach reduces 37.8% total stop delay of cars averagely than the fixed-time method and reduces 17.8% total stop delay of cars averagely than the actuated method under the same condition. © 2009 ieee.

关键词： Multi agent systems

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Wireless sensor networks for logistics and retail

Wireless sensor networks for logistics and retail

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6th international conference on Networked Sensing systems, INSS2009

作者： Zhang, Zhi Chen, Qiang Bergarp, Tobia Norman, Per Wikström, Magnus Yan, Xiaolang Zheng, Li-Rong Ipack VINN Excellence Center Royal Institute of Technology Stockholm Sweden Billerud AB 16927 Solna Stockholm Sweden Institute of VLSI Design Zhejiang University Hangzhou China

ISBN: (纸本)9781424463145

Internet of things technologies makes it possible to trace when and where the excellent food or wine is spoiled or loses perfect taste in logistics and retail. this paper describes a system using a two-layered wireless sensor network to monitor the supply chain from manufacturer to consumer, including the network topology, application software on server, and sensor node hardware. It employs GSM/GPRS as the high layer network and semi impulse ultra-wideband radio (IR-UWB) for the low layer communication. We propose GSM Cell-ID location technology for tracking the goods transportation, and time-of-arrival method for local positioning. Finally, the first version of the system implementation and future work are presented. ©2009 ieee.

关键词： Internet of things

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Energy-efficient task allocation for data fusion in wireless sensor networks

Energy-efficient task allocation for data fusion in wireless...

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2009 6th Annual international conference on Mobile and Ubiquitous systems: Networking and Services, MobiQuitous 2009

作者： Zhigang, Li Shining, Li Xingshe, Zhou Zhiyi, Yang School of Computer Northwestern Polytechnical University Xi'an China

ISBN: (纸本)9789639799592

Data fusion or In-network processing methods were often adopted in Wireless sensor Networks (WSNs) to reduce data communication and prolong network lifetime, which made WSNs application can be described as a set of tasks (sensing, processing) and dependencies among them. Task assignment has become an important problem which needed to be resolved for different tasks assignment caused different energy consumption. Based on the task graph of WSNs, an energy-efficient task assignment framework was proposed. As application task can be decomposed into sensing subtasks and processing subtasks, we present the task assignment as sensing subtask assignment and processing subtask assignment. We formulate the processing subtask assignment as a 0-1 quadratic programming problem and evaluate it through experiments.

关键词： Wireless sensor networks

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A marketing analysis using massive tiny sensor nodes

A marketing analysis using massive tiny sensor nodes

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6th international conference on Networked Sensing systems, INSS2009

作者： Iwai, Masayuki Mori, Masato Touda, Hideyuki Department of Informatics and Electronics Institute of Industrial Science University of Tokyo Researcher 4-6-1 Komaba Meguro Tokyo 153-8505 Japan Graduate School of Media and Governance Keio Univeristy DeltaS213 Tokudalab Endo 5322 Fujisawa Kanagawa 252-8520 Japan

ISBN: (纸本)9781424463145

Existing huge E-Commerce web sites such as Amazon and eBay tends to have a recommendation function to stimulate customer's potential needs by analyzing their click information. On the other hand, POS (Point of sale) data is analyzed by real life retail store owners to gain information about the purchased items. However, POS data is only useful to analyze information regarding "purchased" items;i.e., POS-based analysis is not capable of accessing the customer's potential needs. We have deployed a "SmartStore" system for the retail stores. SmartStore targets hand held sized selling items, such as cellphones and toys. SmartStore gathers customer's action information, such as the act of holding or touching a product attached with massive tiny sensor nodes in the shops. the action data is then interpreted and analyzed as the user interest corresponding to the target product. To show the system scalability, we have gathered more than 3,950,000 photonic and movement sensor data from approximately 120 customers for the duration of 3 days. this experience gained from our experiment leads to the feedbacks obtained from the retail store owners and customers. SmartStore is the first step to converge pervasive computing technology with the "real life" marketing domain. ©2009 ieee.

关键词： Retail stores

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Surviving Holes and Barriers in Geographic Data Reporting for Wireless sensor Networks

Surviving Holes and Barriers in Geographic Data Reporting fo...

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6th international conference on Mobile Adhoc and sensor systems

作者： Zhou, Yangfan Lyu, Michael R. Liu, Jiangchuan Chinese Univ Hong Kong Dept Comp Sci & Engn Shatin Hong Kong Peoples R China Simon Fraser Univ Sch Comp Sci Burnaby BC Canada

ISBN: (纸本)9781424451142

Geographic forwarding is a favorable scheme for data reporting in Wireless sensor Networks (WSNs) due to its simplicity and low-overhead. However, WSNs are usually subject to complicated environmental factors. Network holes (i.e., the areas where no nodes inside) and barriers (i.e., those blocking the communication between two close nodes) are inevitable in practical deploying environments. these issues pose an obstacle to adopting geographic forwarding in WSNs, while current approaches lack an efficient method to tolerate such negative factors. In this paper we specifically tailor a waypoint-based Geographic Data Reporting Protocol (GDRP) for WSNs. Inherited from geographic forwarding, GDRP is light-weighted and hence well-suits WSNs. But unlike current approaches that often find suboptimal paths, GDRP adopts an intelligent strategy to select a best set of waypoints via which packets can efficiently circumvent holes and barriers, and it can thus find better paths. Extensive simulations are conducted to verify the advantages of GDRP in tolerating network holes and obstacles in WSNs.

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