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检索条件"任意字段=13th International Conference on Distributed Computing and Networking, ICDCN 2012"

共 299 条记录，以下是21-30 订阅

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distributed coverage-enhancing algorithms in directional sensor networks with rotatable sensors

Distributed coverage-enhancing algorithms in directional sen...

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13th international conference on distributed computing and networking, icdcn 2012

作者： Hsu, Yin-Chung Chen, Yen-Ting Liang, Chiu-Kuo Department of Computer Science and Information Engineering Chung Hua University Hsinchu 30012 Taiwan

ISBN: (纸本)9783642259586

Directional sensor network is composed of many directional sensor nodes. Unlike conventional sensors that always have an omni-angle of sensing range, directional sensors may have a limited angle of sensing range due to technical constraints or cost considerations. therefore, it is possible that when a directional sensor node is randomly deployed and scattered in the environment, some interested targets cannot be covered even if these targets are located in the sensing range of the sensor. We propose a Maximum Coverage with Rotatable Sensors (MCRS) problem in which coverage in terms of the number of targets to be covered is maximized whereas the rotated angles of sensors are minimized. We present two distributed greedy algorithm solutions for the MCRS problem. Simulation results shows that to apply angle adjustment algorithm can enhance the coverage rate of the directional sensor network. © 2012 Springer-Verlag.

关键词： Sensor nodes

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Dynamic VM consolidation for energy-aware and SLA violation reduction in cloud computing

Dynamic VM consolidation for energy-aware and SLA violation ...

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13th international conference on Parallel and distributed computing, Applications, and Technologies (PDCAT)

作者： Cao, Zhibo Dong, Shoubin S China Univ Technol Commun & Comp Network Lab Guangdong Sch Comp Sci & Engn Guangzhou 510641 Guangdong Peoples R China

ISBN: (纸本)9780769548791

With the large-scale deployment of virtualized data centers, energy consumption and SLA (Service Level Agreement) violation have already become the urgent issue to be solved. And it is essential and important to design energy-aware allocation policy for energy-aware and SLA violation reduction. In this paper, we propose a novel allocation and selection policy for the dynamic virtual machine (VM) consolidation in virtualized data centers to reduce energy consumption and SLA violation. Firstly, we use the mean and standard deviation of CPU utilization for VM to determine the hosts overloaded or not;secondly we use the positive maximum correlation coefficient to select VMs from those overloading hosts for migration. Although the proposed allocation and selection policies performs a little worse than the previous ones in energy consumption, experiments show that it performs greatly better than the previous ones on the whole.

关键词： SLA violation energy-aware VM cloud computing energy consumption

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Providing a Cloud-based Smart Meter Solution to Control and Monitor Electrical Quantities of Industrial Machines 13

Providing a Cloud-based Smart Meter Solution to Control and ...

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13th IEEE international conference on Wireless and Mobile computing, networking and Communications (WiMob)

作者： Lopes, Marcelo Dornbusch Rauta, Leonardo R. P. Mezger, Benjamin W. Wangham, Michelle S. Univ Vale Itajai Lab Embedded & Distributed Syst Itajai SC Brazil Univ Vale Itajai Lab 4Vis Itajai SC Brazil Fed Inst Santa Catarina IFSC Campus Gaspar Gaspar SC Brazil

ISBN: (纸本)9781538638392

the remote monitoring and control of machines are essential in industrial environments. Emerging communication technologies such as Web of things and Machine to Machine Communication can meet this demand for automation in Industry 4.0. this paper aims to introduce a solution for continuous and remote monitoring of electrical quantities in smart industrial environments with three-phase systems. the proposed solution uses a service-oriented architecture and makes use of a Smart Gateway, RESTful web services, and cloud computing. the solution was integrated with a real case study and evaluated by software testing. the results obtained demonstrate the feasibility of the solution, and the accuracy of measurements persisted in the cloud.

关键词： Remote Control and Monitoring Electrical Quantities M2M Web of things Cloud computing

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distributed Symmetry-Breaking with Improved Vertex-Averaged Complexity 19

Distributed Symmetry-Breaking with Improved Vertex-Averaged ...

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20th international conference on distributed computing and networking (icdcn)

作者： Barenboim, Leonid Tzur, Yaniv Open Univ Israel Dept Comp Sci Raanana Israel

ISBN: (纸本)9781450360944

We study the distributed message-passing model in which a communication network is represented by a graph G = (V, E). Usually, the measure of complexity that is considered in this model is the worst-case complexity, which is the largest number of rounds performed by a vertex v is an element of V. While often this is a reasonable measure, in some occasions it does not express sufficiently well the actual performance of the algorithm. For example, an execution in which one processor performs r rounds, and all the rest perform significantly less rounds than r, has the same running time as an execution in which all processors perform the same number of rounds r. On the other hand, the latter execution is less efficient in several respects, such as energy efficiency, task execution efficiency, local-neighborhood efficiency and simulation efficiency. Consequently, a more appropriate measure is required in these cases. Recently, the vertex-averaged complexity was proposed by [13]. In this measure, the running time is the worst-case average of rounds over the number of vertices. Feuilloley [13] showed that leader-election admits an algorithm with significantly better vertex-averaged complexity than worst-case complexity. On the other hand, for O(1)-coloring of rings, the worst-case and vertex-averaged complexities are the same. this complexity is theta(log* n) [13]. It remained open whether the vertex-averaged complexity of symmetry-breaking in general graphs can be better than the worst-case complexity. In this paper we devise symmetry-breaking algorithms with significantly improved vertex-averaged complexity for both general graphs, as well as specific graph families. Some algorithms of ours have significantly better vertex-averaged complexity than the best-possible worst case complexity. In particular, for general graphs, we devise an O(a)-forests-decomposition algorithm with a vertex-averaged complexity of O(1) rounds, where the arboricity a is the minimum number of for

关键词： Graphic methods

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First experimental assessments of the adaptivity of the scheduling with AS4DR

First experimental assessments of the adaptivity of the sche...

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13th international conference on Parallel and distributed computing, Applications, and Technologies (PDCAT)

作者： Millot, Daniel Parrot, Christian Telecom SudParis Inst Mines Telecom Evry France

ISBN: (纸本)9780769548791

the AS4DR (Adaptive Scheduling for distributed Resources) scheduling method experimented in this paper aims at maximizing the CPU use efficiency when executing divisible load applications on heterogeneous distributed memory platforms. AS4DR adapts the scheduling to: the unawareness of the total workload, both the unspecification and the variation over time of the execution parameters (available communication speed, available computing speed, etc.). this paper presents the first experimental assessments of the adaptivity of the scheduling with this method.

关键词： parallel application multi-round divisible load scheduling heterogeneous platform adaptive scheduling unspecified distributed memory platform

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An Adaptive Resource Scheduling Mechanism based on User Behavior Feedback in Cloud computing

An Adaptive Resource Scheduling Mechanism based on User Beha...

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13th international conference on Parallel and distributed computing, Applications, and Technologies (PDCAT)

作者： Ding, Ding Li, Yidong Ai, Lihua Luo, Siwei Beijing Jiaotong Univ Sch Comp & Informat Technol Beijing Peoples R China

ISBN: (纸本)9780769548791

Scheduling mechanism in cloud computing environment concerns more about the needs of users due to the commercial purpose of cloud computing. In response to this user-oriented feature, an Adaptive Resource Scheduling Mechanism based on User Behavior Feedback(ARSM-UBF) is developed to schedule cloud resources from the perspective of users. In ARSM-UBF, information collected from scheduling interaction is adopted as the reflection of user behavior and by introducing the relevance feedback mechanism, user behavior information is integrated into the resource scheduling and continuous feedback is proceeded on the following scheduling process to make scheduling results closer to the user's subjective perception. Furthermore, ARSM-UBF gives attention to the efficiency of cloud system. Simulation results confirm that this user behavior feedback based scheduling mechanism is much more efficient since it can not only provide guaranteed services for users with diverse requirements, but also improve the resource utilization rate from the system's perspectives.

关键词： cloud computing resource scheduling user behavior feedback adaptive

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A QoE Based Performance Study of Mobile Peer-to-Peer Live Video Streaming

A QoE Based Performance Study of Mobile Peer-to-Peer Live Vi...

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13th international conference on Parallel and distributed computing, Applications, and Technologies (PDCAT)

作者： Fung, Kwok-Chun Kwok, Yu-Kwong Univ Hong Kong Dept Elect & Elect Engn Hong Kong Hong Kong Peoples R China

ISBN: (纸本)9780769548791

Peer-to-peer (P2P) Mobile Ad Hoc Networks (MANETs) are widely envisioned to be a practical platform to mobile live video streaming applications (e. g., mobile IPTV). However, the performance of such a streaming solution is still largely unknown. As such, in this paper, we aim to quantify the streaming performance using a Quality of Experience (QoE) based approach. Our simulation results indicate that video streaming performance is highly sensitive to the video chunk size. Specifically, if the chunk size is small, performance, in terms of both QoE and QoS, is guaranteed but at the expense of a higher overhead. On the other hand, if chunk size is increased, performance can degrade quite rapidly. thus, it needs some careful fine tuning of chunk size to obtain satisfactory QoE performance.

关键词： Mobile ad hoc networks live streaming overlay networks peer-to-peer (P2P) computing

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Preliminary Search Engine for Open Protein Identification

Preliminary Search Engine for Open Protein Identification

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13th international conference on Parallel and distributed computing, Applications, and Technologies (PDCAT)

作者： Zhang, Wenli Chi, Hao Lu, Yuanzheng Huang, Yuqing Zhao, Xiaofang He, Simin Chinese Acad Sci Inst Comp Technol Beijing Peoples R China

ISBN: (纸本)9780769548791

Protein identification is the most important and basic problem for proteomics. Using tandem mass spectrometry and database search is one of the most widely used identification techniques. However, the improved sensitivity of mass spectrometers, rapid expansion of databases and more complex analysis, like post-translational modification and non-specific enzymatic digestion, have challenged current restricted protein identification search engines in scale and speed severely. In this paper, we proposed an open protein identification method relaxing enzyme, and presented our distributed design to support big protein database with non-specific digestion analysis based on pFind, a practical tandem mass spectra search engine developed in China. With classical bigger protein databases *** and uniprot-sprot we got nearly linear speedup in a 20-blade cluster. By further analysis, we can expect real time identification to some extent.

关键词： open protein identification non-specific enzymatic digestion search engine distributed cluster

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Multi-path OLSR performance analysis in a large testbed environment

Multi-path OLSR performance analysis in a large testbed envi...

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13th international conference on distributed computing and networking, icdcn 2012

作者： Szwabe, Andrzej Misiorek, Pawel Urbanski, MacIej Juraschek, Felix Güneş, Mesut Institute of Control and Information Engineering Poznan University of Technology M. Sklodowskiej-Curie 5 60-965 Poznan Poland Institute of Computer Science Distributed Embedded Systems Freie Universität Berlin Germany

ISBN: (纸本)9783642259586

Optimized Link State Routing (OLSR) protocol is a leading proactive routing protocol for Mobile Ad-hoc Networks (MANETs). Since the OLSR protocol in its standard version does not support multi-path packet forwarding, we have developed and implemented its multi-path extension. As a result of a slightly modified path computation algorithm and the application of backpressure Max-Weight Scheduling (MWS) policy, the MANETs can utilize the extended functionality based on OLSR. the experiment results presented in this paper compare the performance of the standard and extended OLSR versions in a large congested MANET (i.e., in large-scale DES-Testbed located at Freie Universitat Berlin). © 2012 Springer-Verlag.

关键词： Mobile ad hoc networks

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Information Dissemination Performance of a Disaster-tolerant NDN-based distributed Application in Disrupted Cellular Networks

Information Dissemination Performance of a Disaster-tolerant...

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13th IEEE international conference on Peer-to-Peer computing (P2P)

作者： Ogawara, Takeo Kawahara, Yoshihiro Asami, Tohru Univ Tokyo Grad Sch Informat Sci & Technol Bunkyo Ku Tokyo Japan

ISBN: (纸本)9781479905218

During a disaster, it is important to exchange information such as the magnitude of the disaster and safety confirmation. However, the communication infrastructure, such as a mobile phone network, may not be available after a large-scale disaster because current communication infrastructures have centralized control structures. thus, it is important to design a network that can maintain a normal service using the remaining network resources, such as base stations and user terminals, even if the central servers are no longer available because of disconnections among servers. In this study, we developed a distributed SNS service, or autonomous distributed network, based on named data networking (NDN) with two-tier hierarchical ID-based encryption (HIDE) for authentication. We conducted a simulation of a residential area in the suburbs of Tokyo to demonstrate the performance of this SNS application, where it was used to disseminate safety confirmation. We present the average message delivery time with different decision intervals, the synchronization intervals, and the ratios of moving people.

关键词： cellular radio cryptography information dissemination message passing synchronisation

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