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检索条件"任意字段=3rd Euro-NF Conference on Network Control and Optimization"

共 1643 条记录，以下是1471-1480 订阅

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Alpha-Fair Resource Allocation under Incomplete Information and Presence of a Jammer

引用

3rd euro-nf conference on network control and optimization

作者： Altman, Eitan Avrachenkov, Konstantin Garnaev, Andrey INRIA Sophia Antipolis Sophia Antipolis France St Petersburg State Univ St Petersburg 199034 Russia

ISBN: (纸本)9783642104053

In the present work we deal with the concept of alpha-fair resource allocation in the situation where the decision maker (in our case, the base station) does not have complete information about the environment. Namely, we develop a concept of a-fairness under uncertainty to allocate power resource in the presence of a jammer under two types of uncertainty: (a) the decision maker does not have complete knowledge about the parameters of the environment, but knows only their distribution, (b) the jammer can come into the environment with some probability bringing extra background noise. The goal of the decision maker is to maximize the a-fairness utility function with respect to the SNIR (signal to noise-plus-interference ratio). Here we consider a concept of the expected a-fairness utility function (short-term fairness) as well as fairness of expectation (long-term fairness). In the scenario with the unknown parameters of the environment the most adequate approach is a zero-sum game since it can also be viewed as a minimax problem for the decision maker playing against the nature where the decision maker has to apply the best allocation under the worst circumstances. In the scenario with the uncertainty about jamming being in the system the Nash equilibrium concept is employed since the agents have non-zero sum payoffs: the decision maker would like to maximize either the expected fairness or the fairness of expectation while the jammer would like to minimize the fairness if he comes in on the scene. For all the plots the equilibrium strategies in closed form are found. We have shown that for all the scenarios the equilibrium has to be constructed into two steps. In the first step the equilibrium jamming strategy has to be constructed based on a solution of the corresponding modification of the water-filling equation. In the second step the decision maker equilibrium strategy has to be constructed equalizing the induced by jammer background noise.

关键词： Wireless networks Power control Incomplete Information Nash Equilibrium Saddle Point

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A New Particle Swarm optimization Algorithm for Neural network optimization

A New Particle Swarm Optimization Algorithm for Neural Netwo...

引用

3rd International conference on network and System Security

作者： Ling, S. H. Nguyen, Hung T. Chan, K. Y. Univ Technol Sydney Ctr Hlth Technol Fac Engn & Informat Technol Sydney NSW 2007 Australia Curtin Univ Technol Digital Ecosyst & Business Intelligence Inst Perth WA Australia

ISBN: (纸本)9781424450879

This paper presents a new particle swarm optimization (PSO) algorithm for tuning parameters (weights) of neural networks. The new PSO algorithm is called fuzzy logic-based particle swarm optimization with cross-mutated operation (FPSOCM), where the fuzzy inference system is applied to determine the inertia weight of PSO and the control parameter of the proposed cross-mutated operation by using human knowledge. By introducing the fuzzy system, the value of the inertia weight becomes variable. The cross-mutated operation is effectively force the solution to escape the local optimum. Tuning parameters (weights) of neural networks is presented using the FPSOCM. Numerical example of neural network is given to illustrate that the performance of the FPSOCM is good for tuning the parameters (weights) of neural networks.

关键词： Fuzzy systems

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State-based Usage control Enforcement with Data Flow Tracking using System Call Interposition

State-based Usage Control Enforcement with Data Flow Trackin...

引用

3rd International conference on network and System Security

作者： Harvan, Matus Pretschner, Alexander ETH Informat Secur Zurich Switzerland TU Kaiserslautern Fraunhofer IESE Kaiserslautern Germany

ISBN: (纸本)9781424450879

Usage control generalizes access control to what happens to data in the future. We contribute to the enforcement of usage control requirements at the level of system calls by also taking into account data flow: Restrictions on the dissemination of data, for instance, as stipulated by data protection regulations, of course relate not to just one file containing the data, but likely to all copies of that file as well. In order to enforce the dissemination restrictions on all copies of the sensitive data item, we introduce a data flow model that tracks how the content of a file flows through the system (files, network sockets, main memory). By using this model, the existence of potential copies of the data is reflected in the state of the data flow model. This allows us to enforce the dissemination restrictions by relating to the state rather than all sequences of events that possibly yield copies. Generalizing this idea, we describe how usage control policies can be expressed in a related state-based manner Finally, we present an implementation of the data flow model and state-based policy enforcement as well as first encouraging performance measurements.

关键词： Sensitive data

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3rd International conference on Genetic and Evolutionary Computing, WGEC 2009

3rd International Conference on Genetic and Evolutionary Com...

引用

3rd International conference on Genetic and Evolutionary Computing, WGEC 2009

ISBN: (纸本)9780769538990

The proceedings contain 208 papers. The topics discussed include: intrusion detection system based on payoff matrix for wireless sensor networks;a reputation mechanism to stimulate node cooperation in ad hoc networks;an improved RBF neural network based on evolutionary programming;an improved quantum genetic algorithm;the application of cultural algorithm in load balancing of hybrid P2P network;a reflective requirements specification for requirements evolving;RFID middleware design and implement in enterprise information public service platform;MPEG-4 image encryption research based on VEA algorithm;improved genetic algorithm for aircraft departure sequencing problem;groundwater level dynamic prediction based on chaos optimization and support vector machine;multi-objective particle swarm optimization method based on fitness function and sequence approximate model;satisfactory design of IIR digital filter based on chaotic mutation particle swarm optimization;and an optimal controller based-on GA for direct torque control.

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Video Web: Design of a Wireless Camera network for Real-time Monitoring of Activities

Video Web: Design of a Wireless Camera Network for Real-time...

引用

3rd ACM/IEEE International conference on Distributed Smart Cameras

作者： Nguyen, Hoang Bhanu, Bir Patel, Ankit Diaz, Ramiro Univ Calif Riverside Ctr Res Intelligent Syst Riverside CA 92521 USA

ISBN: (纸本)9781424446193

Sensor networks have been a very active area of research in recent years. However, most of the sensors used in the development of these networks have been local and non-imaging sensors such as acoustics, seismic, vibration, temperature, humidity, etc. The development of emerging video sensor networks poses its own set of unique challenges, including high bandwidth and low latency requirements for real-time processing and control. This paper presents a systematic approach for the design, implementation, and evaluation of a large-scale, software-reconfigurable, wireless camera network, suitable for a variety of practical real-time applications. We take into consideration issues related to the hardware, software, control, architecture, network connectivity, performance evaluation, and data processing strategies for the network. We perform multi-objective optimization on settings such as video resolution and compression quality to provide insight into the performance trade-offs when configuring such a network.

关键词： Multiobjective optimization

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Improving Transparency in network-based Haptics

Improving Transparency in Network-based Haptics

引用

3rd Joint euroHaptics conference Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems

作者： Niakosari, Sina Sirouspour, Shahin McMaster Univ Hamilton ON Canada

ISBN: (纸本)9781424438587

This paper is concerned with network-based multi-user haptic interaction using a distributed peer-peer control architecture. It proposes new quantitative measures for quantifying the fidelity of haptic simulations in such environments. User's perceived admittance and discrepancy among local copies of virtual objects are considered in defining these measures. A state prediction scheme is proposed to compensate for the negative effects of the network communication delay on the transparency and stability of the haptic simulation. An optimization problem is formulated for selecting the control gains that can enhance the performance while maintaining system stability. Numerical analysis and haptic interaction experiments are carried out to demonstrate the effectiveness of the proposed approach.

关键词： Haptic Interface control Cooperative Haptics Multi-user Haptics Collaborative Virtual Environments network-based Haptics Multi-rate control Systems

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Integrated control platform with load balancing algorithm in hybrid optical wireless networks

Integrated control platform with load balancing algorithm in...

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3rd International conference on New Technologies, Mobility and Security, NTMS 2009

作者： Yan, Ying Dittmann, Lars Wong, Shing-Wa Kazovsky, Leonid G. Department of Photonics Engineering Technical University of Denmark Lyngby Denmark Photonics and Networking Research Laboratory Department of Electrical Engineering Stanford University Stanford CA United States

ISBN: (纸本)9781424462735

In this paper we cover the problem of load balancing in terms of optimum cell selection and wireless channel condition in the hybrid optical wireless network. For a given set of multimedia users with minimum quality of service requirements and a set of best effort users we find the optimum resource allocation that guarantees services for the users and maximizes the total network utility. Our model applies for the convergence network of EPON and WiMAX where the TDM-like resource assignment scheme and the WiMAX air interfaces are used. We achieve convexity of the problem and solve the optimization problem. The proposed algorithm is simulated using MATLAB and the results show validation of the framework, i.e., load balancing scheme gains better network performances. ©2009 IEEE.

关键词： Quality of service

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Enhancement of Particle Swarm optimization in Elman Recurrent network with bounded Vmax Function

Enhancement of Particle Swarm Optimization in Elman Recurren...

引用

3rd Asia International conference on Modelling and Simulation

作者： Ab Aziz, Mohamad Firdaus Shamsuddin, Siti Mariyam Hj Alwee, Razana Soft Computing Research Group Faculty of Computer Science and Information Systems 81310 Skudai Universiti Teknologi Malaysia

ISBN: (纸本)9781424441549

As the widespread modus operandi in real applications, Backpropagation(BP) in Recurrent Neural networks (RNN) is computationally more powerful than standard feedforward neural networks. In principle, RNN can implement almost any arbitrary sequential behavior. However, there are many drawbacks in BP network, for instance, confinement in finding local minimum and may get stuck at regions of a search space or trap in local minima. To solve these problems, various optimization techniques such as Particle Swarm optimization (PSO) and Genetic Algorithm (GA) have been executed to improve ANN performance. In this study, we exploit errors optimization of Elman Recurrent network with Particle Swarm optimization (ERNPSO) to probe the performance of both networks with bounded Vmax function. Main characteristics of Vmax function are to control the global exploration of particles in PSO. The results show that ERNPSO with bounded Vmax of hyperbolic tangent furnishes promising outcomes in terms of classification accuracy and convergence rate compared to bounded Vmax sigmoid function and standard Vmax function.

关键词： Artificial Neural network Backpropagation network Recurrent network Elman Recurrent network Particle Swarm optimization

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Delay Analysis and optimization Strategy in network Communication

Delay Analysis and Optimization Strategy in Network Communic...

引用

3rd International conference on New Trends in Information and Service Science (NISS 2009)

作者： Yu, Z. C. Zhang, H. Y. Yanshan Univ Qinhuangdao Coll Informat Sci & Engn Qinhuangdao 066004 Peoples R China

ISBN: (纸本)9781424444168

TCP's congestion control provides remarkable stability to the media streaming. In the course of implementation of the TCP protocol,in order to achieve optimal throughput TCP led to the delay and reduce the quality of the media streaming transmission..In this paper, we introduced dynamic tuning of the send-side buffer ways to minimize this latency. The experiment proved that the method introduced by this article can effectively reduce the latency caused by TCP layer, hence reduce the end-to-end latency of TCP connection.

关键词： Congestion control TCP protocol Media Streaming Application Dynamic Buffer Tuning

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Combustion optimization based on RBF neural network and multi-objective genetic algorithms

Combustion optimization based on RBF neural network and mult...

引用

3rd International conference on Genetic and Evolutionary Computing, WGEC 2009

作者： Feng, Wang Dong Dao, Li Qin Li, Meng Pu, Han School of Control Science and Engineering North China Electric Power University Baoding Hebei 071003 China

ISBN: (纸本)9780769538990

Coal-fired boiler operation is confronted with two requirements to reduce its operation cost and to lower its emission. In this paper, a model for boiler efficiency and a model for NOx emission are set up respectively by RBF neural network. In order to obtain more accurate models without trying repeatedly, GA is introduced to optimize the parameter of RBF network. Then Non-Dominated Sorting Genetic Algoritthm-II is employed to perform a search to determine the optimum solution of boiler operation after we obtain boiler combustion model. Eexperimental results prove that the method proposed in this paper can improve boiler efficiency and reduce NOx emission obviously. Through analysis, we can see this method is better than the traditional method which uses weights to combine boiler efficiency and NOx emission in one objective function. © 2009 IEEE.

关键词： Radial basis function networks

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