检索结果-内蒙古大学图书馆

Evaluation method with measureable space-time dynamic properties for mobile Ad Hoc networks

Ruan Jian Xue Bao/Journal of software 2011年第6期22卷 1333-1349页

作者： Wang, Wei Guan, Xiao-Hong Wang, Bei-Zhan Wang, Ya-Ping State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an 710049 China School of Computer Science Xi'an Polytechnic University Xi'an 710048 China School of Software Xiamen University Xiamen 361005 China Department of Industrial and Systems Engineering Texas A and M University TX 77843 United States

Mobility model is a crucial feature to differentiate ad hoc networks from other networks. The evaluation of dynamic network properties caused by mobility model is the basic problem for research on protocol simulation and related technologies, such as topology control and network performance measurement, in ad hoc networks. In this paper, a model-based description of ad hoc networks is improved to avoid the drawbacks in describing the corresponding space-time dynamic properties. Then a universal evaluation method with measureable space-time dynamic properties is presented. The dynamic properties of several mobility models are studied by constructing the space distribution of the nodes and designing the models for analyzing the topological space-time dynamic properties. Furthermore, a novel mobility model based on circular curve movement is proposed to improve the flexibility and the capability to describe realistic scenarios with curve movement. Simulation with NS2 shows the presented method can effectively evaluate the characteristics of the existing mobility models. The numerical results also show that the proposed mobility model has good dynamic properties in comparison with the existing mobility models. ©2011 ISCAS.

关键词： Mobile ad hoc networks

来源：评论

学校读者我要写书评

暂无评论

Design of a robot cloud center

Design of a robot cloud center

引用

International Workshop on Assurance in Distributed systems and Networks

作者： Du, Zhihui Yang, Weiqiang Chen, Yinong Sun, Xin Wang, Xiaoying Xu, Chen Tsinghua National Laboratory for Information Science and Technology Department of Computer Science and Technology Tsinghua University 100084 Beijing China School of Software and Microelectronics Peking University 102600 Beijing China School of Computing Informatics and Decision Systems Engineering Arizona State University Tempe AZ 85287 United States Department of Computer Technology and Application Qinghai University Xining Qinghai 810016 China International School Beijing University of Posts and Telecommunications 102209 Beijing China

ISBN: (纸本)9780769543499

Service-oriented architecture and cloud computing have become the prevalent computing paradigm. In this paradigm, computing resources can be accessed like other utility services available in today's society. In the meantime, robotics applications are joining the trend. More and more robot applications are shifting from manufacture to non-manufacture and service industries. However, for the on-demand supply of the large-scale heterogeneous robots, It is still a problem have not yet been studied, including the fundamental management and efficiency issues in using of these resources. In this paper, we design a framework of "Robot Cloud Center" (RCC) following the general cloud computing paradigm to address the current limitations in capacity and versatility of robotic applications. In this framework, a robot can be provided as a service just like a public utility service so that everyone can access the powerful robotic services easily, efficiently, and cheaply. Based on a given scenario, a robot scheduling algorithm in RCC is proposed to take advantage of the heterogeneous robot resources to meet the end user's requirement with the minimum cost.

关键词： Robot programming

来源：评论

学校读者我要写书评

暂无评论

Frontier-based multi-robot map exploration using Particle Swarm Optimization

Frontier-based multi-robot map exploration using Particle Sw...

引用

IEEE Swarm Intelligence Symposium, SIS

作者： Yiheng Wang Alei Liang Haibing Guan School of Software Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiaotong University Shanghai China Department of Computer Science and Engineering Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiaotong University Shanghai China

Exploring an unknown environment using team of autonomous mobile robots is an important task in many real-world applications. Many existing map exploration algorithms are based on frontier, which is the boundary between unexplored space and known open space. In the context of multiple robots, the main problem of frontier-based algorithm is to choose appropriate target points for the individual robots so that they can efficiently explore the different part of the common area. This paper proposed a novel distributed frontier-based map exploration algorithm using Particle Swarm Optimization model for robot coordination. In this algorithm, the robot keeps moving to the nearby frontier to reduce the size of the unknown region, and is navigated towards frontier far away based on the PSO model after exploring the local area. The exploration is completed when there are no frontier cells on the map. Our algorithm has been implemented and tested both in simulation runs and real world experiment. The result shows that our method has a good scalability and efficiency.

关键词： Legged locomotion Robot kinematics Collision avoidance Algorithm design and analysis Robot sensing systems Redundancy

来源：评论

学校读者我要写书评

暂无评论

Structural dependence of grain boundary resistivity in copper nanowires

Structural dependence of grain boundary resistivity in coppe...

引用

作者： Kim, Tae-Hwan Nicholson, Don M. Zhang, X.-G. Evans, Boyd M. Kulkarni, Nagraj S. Kenik, Edward A. Meyer, Harry M. Radhakrishnan, Balasubramaniam Li, An-Ping Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 United States Computer Science and Mathematics Division Oak Ridge National Laboratory Oak Ridge TN 37831 United States Measurement Science and Systems Engineering Division Oak Ridge National Laboratory Oak Ridge TN 37831 United States Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 United States Department of Physics POSTECH Pohang Gyeongbuk 790-784 Korea Republic of

We report the direct measurement of individual grain boundary (GB) resistances and the critical role of GB structure in the increased resistivity in copper nanowires. By measuring both intra- and inter-grain resistance with a four-probe scanning tunneling microscope, large resistance jumps are revealed owing to successive scattering across high-angle random GBs, while the resistance changes at twin and other coincidence boundaries are negligibly small. The impurity distributions in the nanowires are characterized in correlating to the microstructures. The resistance of high symmetry coincidence GBs and the impurity contributions are then calculated using a first-principle method which confirms that the coincidence GBs have orders of magnitude smaller resistance than the high-angle random GBs. © 2011 The Japan Society of Applied Physics.

关键词： Nanowires

来源：评论

学校读者我要写书评

暂无评论

On the complexity of leakage interference minimization for interference alignment

On the complexity of leakage interference minimization for i...

引用

IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC)

作者： Ya-Feng Liu Yu-Hong Dai Zhi-Quan Luo State Key Laboratory of Scientific and Engineering Computing Academy of Mathematics and Systems Science Chinese Academy and Sciences Beijing China Department of Electronic and Computer Engineering University of Minnesota Minneapolis MN USA

For a general MIMO interference channel, we can determine the feasibility of linear interference alignment via minimizing the leakage interference. This paper gives a complete complexity characterization of the leakage interference minimization problem. It is shown that, when each transmitter (receiver) is equipped with at least three antennas and each receiver (transmitter) is equipped with at least two antennas, the problem of checking whether the interference in the network can be perfectly aligned is strongly NP-hard. Moreover, when each transmit/receive node is equipped with two or more antennas, leakage interference minimization can not be solved (even approximately) in polynomial time, unless P = NP.

关键词： Interference Polynomials Minimization MIMO Complexity theory Receiving antennas

来源：评论

学校读者我要写书评

暂无评论

Distributed Output Regulation of Uncertain and Switching Multi-Agent systems via Internal Model Design

Distributed Output Regulation of Uncertain and Switching Mul...

引用

2011 China Control and Decision Conference(2011中国控制与决策会议 CCDC)

作者： Xiaoli Wang Yiguang Hong Zhong-Ping Jiang School of Information Science and Engineering Harbin Institute of Technology atWeihaiWeihai 264209 Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy o Department of Electrical and Computer Engineering Polytechnic Institute of New York University Six

In this paper, the distributed robust output regulation problem of linear multi-agent systems (MAS) is considered. The driving force from the active leaders or the environmental disturbances is formulated as an input of an exogenous system (or exosystem) of the considered multi-agent networks. A systematic distributed design approach is proposed to handle output regulation via dynamic output feedback with the help of canonical internal model (IM). With common solutions of regulator equations and Lyapunov functions, the distributed robust output regulation with switching interconnection topology is designed to achieve collective aims.

关键词： Output regulation Multi-agent systems Internal Model Switching Topology

来源：评论

学校读者我要写书评

暂无评论

Reports of the AAAI 2010 fall symposia

Reports of the AAAI 2010 fall symposia

引用

作者： Azevedo, Roger Biswas, Gautam Bohus, Dan Carmichael, Ted Finlayson, Mark A. Hadzikadic, Mirsad Havasi, Catherine Horvitz, Eric Kanda, Takayuki Koyejo, Oluwasanmi Lawless, William F. Lenat, Doug Meneguzzi, Felipe Mutlu, Bilge Oh, Jean Pirrone, Roberto Raux, Antoine Sofge, Donald A. Sukthankar, Gita Van Durme, Benjamin Yorke-Smith, Neil Department of Educational and Counseling Psychology McGill University Canada Center for Intelligent Systems Vanderbilt University United States Microsoft Research Redmond United States Department of Software and Information Systems University of North Carolina Charlotte United States Complex Systems Institute United States Computer Science and Artificial Intelligence Laboratory Massachusetts Institute of Technology United States Media Lab. Massachusetts Institute of Technology United States ATR Intelligent Robotics and Communication Laboratories Kyoto Japan Department of Electrical and Computer Engineering University of Texas Austin United States Department of Mathematics Paine College Augusta GA United States Cycorp Austin TX United States Robotics Institute Carnegie Mellon University United States Department of Computer Sciences University of Wisconsin Madison United States University of Palermo Italy Honda Research Institute United States Navy Center for Applied Research in Artificial Intelligence Naval Research Laboratory Washington DC United States Department of Electrical Engineering and Computer Science University of Central Florida United States Department of Computer Science Johns Hopkins University United States American University of Beirut Lebanon SRI International's Artificial Intelligence Center United States

The Association for the Advancement of Artificial Intelligence (AAAI) presented the 2010 Fall Symposium Series on November 11-13, 2010. The eight symposia included Cognitive and Metacognitive Educational systems, Commonsense Knowledge, Complex Adaptive systems: Resilience, Robustness, and Evolvability, Computational Models of Narrative, Dialog with Robots, Manifold Learning and Its Applications, Proactive Assistant Agents and Quantum Informatics for Cognitive, Social, and Semantic Processes. Cognitive and Metacognitive Educational systems aimed to provide a comprehensive definition of metacognitive educational systems that is inclusive of the theoretical, architectural, and educational aspects of this field. The AAAI Commonsense Knowledge Fall Symposium had the goal of bringing together the diverse elements of this community whose work benefits from or contributes to the representation of general knowledge about the world. One of the specific goals of Proactive symposium was to gather the researchers from various projects in assistant agents to share their wisdom in retrospect.

关键词： Semantics

来源：评论

学校读者我要写书评

暂无评论

Publisher's Note: "On Lagrangian single-particle statistics" [Phys. Fluids 24, 055102 (2012)]

引用

Physics of Fluids 2012年第7期24卷

作者： Falkovich, Gregory Xu, Haitao Pumir, Alain Bodenschatz, Eberhard Biferale, Luca Boffetta, Guido Lanotte, Alessandra S. Toschi, Federico Physics of Complex Systems Weizmann Institute of Science Rehovot 76100 Israel Max Planck Institute for Dynamics and Self-Organization D-37077 Göttingen Germany Laboratoire de Physique Ecole Normale Supérieure de Lyon 46 Université Lyon 1 and CNRS F-69007 Lyon France Institute for Nonlinear Dynamics University of Göttingen D-37077 Göttingen Germany Laboratory of Atomic and Solid State Physics Sibley School of Mechanical and Aerospace Engineering Cornell University Ithaca NY 14853 United States Department of Physics and INFN University of Tor Vergata Via della Ricerca Scientifica 1 I-00133 Roma Italy Department of Physics and INFN University of Torino I-10125 Torino Italy ISAC-CNR Str. Prov. Lecce-Monteroni and INFN Sezione di Lecce I-73100 Lecce Italy Department of Physics Department of Mathematics and Computer Science J.M. Burgerscentrum. Eindhoven University of Technology 5600 MB Eindhoven Netherlands IAC CNR Via dei Taurini 19 I-00185 Roma Italy

This article was originally published online on 14 May 2012 with an incorrectly formatted collaboration and an error in Eq. (9). AIP apologizes for these errors

关键词：

来源：评论

学校读者我要写书评

暂无评论

Dynamics of passively phased fiber laser arrays

Dynamics of passively phased fiber laser arrays

引用

2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011

作者： Jacobo, A. Colet, P. Bochove, E.J. Braiman, Y. Aceves, A.B. Deiterding, R. Miller, C.A. Rhodes, C. Shakir, S.A. UIB-CSIC Palma de Mallorca E07122 Spain Max Planck Institute for the Physics of Complex Systems Nathnitzer Straße 38 01187 Dresden Germany Air Force Research Laboratory Kirtland Air Force Base NM 87117 United States Center for Engineering Science Advanced Research Computer Science and Mathematics Division Oak Ridge National Laboratory Oak Ridge TN 37831 United States Department of Mathematics Southern Methodist University Dallas TX 75275 United States Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee Knoxville TN 37996 United States Department of Mathematics University of Tennessee Knoxville TN 37996 United States Libration Systems Management Inc. Albuquerque NM 87106 United States TASC Inc. Albuquerque NM 87106 United States

ISBN: (纸本)9781457705335

The goal of scaling fiber lasers to high power levels for applications has created an interest in coherently combine the beams of a number of fibers. However, success in accurately controlling the frequencies and phases of the fields by either passive, active or hybrid means has until now been limited. Studies of the dynamics of passively phased fiber arrays have been published, but the understanding of their instabilities is limited. © 2011 IEEE.

关键词： Fiber lasers

来源：评论

学校读者我要写书评

暂无评论

A Virtualization Approach to Auto-Scaling Problem

A Virtualization Approach to Auto-Scaling Problem

引用

International Conference on Information Technology: New Generations (ITNG)

作者： Theera Thepparat Amnart Harnprasarnkit Douanghatai Thippayawong Veera Boonjing Pisit Chanvarasuth Software Systems Engineering Laboratory.Department of Computer Science Faculty of Science King Mongkuts Institute of Technology Ladkrabang Bankok Thailand School of Management Technology Sirindhorn International Institute of Technology Thammasat University Pathumthani Thailand

The paper proposes to simulate feasibility of using virtualization technology to auto-scaling problem in cloud computing. It uses ARENA simulation software to build two different models. There are auto-scaling without server virtualization and auto-scaling with server virtualization. The results of our experiment show that employing virtualization technology increases both life time of servers and CPU utilization.

关键词： Servers Electronic mail Load modeling Computational modeling Cloud computing Mathematical model Blogs

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：