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Online adaptive fuzzy logic controller using neural network for Networked Control systems

Online adaptive fuzzy logic controller using neural network ...

引用

14th international conference on Advanced communication Technology, ICACT 2012

作者： Hajebi, Pooya Almodarresi, Seyed Mohammad Taghi Electrical and Computer Engineering Department Yazd University Yazd Iran

ISBN: (纸本)9788955191639

Networked Control systems are used for controlling remote plants via shared data communication networks such as Ethernet. these systems have found many applications in industrial, medical and space sciences fields. However there are some drawbacks in these systems, which make them challenging to design. One of the most common problems in these systems is the stochastic time delay. Packet switching in internet brings about the randomly varying delay time and consequently makes these systems instable. Convenient controllers such as PID and PI type controllers which are just match with a constant delay time could not be a solution for these systems. Fuzzy logic controllers due to their none-linear characteristic which is compatible with these systems are potentially a wise option for their control purpose. Fuzzy logic controller could become adaptive by means of neural networks and beneficial to deal with the varying time delay problem. Further, they do have more capabilities to tackle packet dropouts and dynamically system variables. this paper introduces a novel control method which addresses the time delay varying problem effectively. this novel method suggests an online adaptive fuzzy logic controller which have been controlled and adapted through the neural network. this designed controller is applied to an AC 400 W servo motor as a remote plant in order to position control it via Ethernet. the measurement of round-trip time (RTT) is used to estimate the online time delay as a parameter in online adaptive fuzzy logic controller. the rule-based table of designed fuzzy logic controller rotates in relation to this estimated time delay. the value of rotating is obtained from a trained neural network. Comparison of results from simulations of different controllers and their comparison indicate that this novel designed controller provides a better performance over the varying time delay. the proposed method follows the input easily, despite classical methods which resul

关键词： Controllers

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An efficient power-saving downlink transmission scheme in OFDM-based multiple component carrier systems

An efficient power-saving downlink transmission scheme in OF...

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14th international conference on Advanced communication Technology, ICACT 2012

作者： Tung, Chien-Te Chung, Yao-Liang Tsai, Zsehong Graduate Institute of Communication Engineering National Taiwan University Taipei Taiwan

ISBN: (纸本)9788955191639

Traditional resource allocation studies of wireless access networks almost all focused on the maximization of the network capacity and quality of services (QoS). As the development of the cellular technologies (such as LTE-Advanced) progress, more than one component carrier (CCs) can now be jointly utilized in a base station (BS). However, the use of some CCs may not be necessary at light traffic loads, from the point of view of green communication. In this study, we propose a technique for dynamic power adjustment to enable energy-efficient data transmissions. that is, utilize only the necessary transmission power. In our model, the activities in downlink transmissions of a BS with 2 OFDM-based CCs are considered, while simultaneously supporting both real-time and non-real-time users. We employ a computationally efficient scheme according to the fluctuating traffic load to address the problem of power minimization at the BS transceiver, subject to the constraint of minimum rates for all users. Simulation results demonstrate that the energy consumption of our proposed scheme is much better than that of the case in which all CCs are always active, when both schemes maintain the required QoS. © 2012 GIRI.

关键词： Orthogonal frequency division multiplexing

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Availability improvement of ship's optical communication network

Availability improvement of ship's optical communication net...

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international conference on Transparent Optical networks

作者： Irena Jurdana Branko Mikac Vinko Tomas Faculty of Maritime Studies University of Rijeka Rijeka Croatia Faculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia

ISBN: (纸本)9781467322287

the paper presents the heuristic approach to availability analysis of optical communication networks connecting ship's systems. the availabilities of individual components have been calculated, as the basis for the entire system availability evaluation. Several network availability structures and protection scenarios are presented and the availability evaluated. Based on the analysis, the possibility for improving ship's communication system availability has been proposed, contributing to the overall availability improvement of ship's systems.

关键词： Availability Optical fiber cables Optical fibers Power cables Marine vehicles communication networks

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networks in automotive systems: the potential for optical wireless integration

Networks in automotive systems: The potential for optical wi...

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international conference on Transparent Optical networks

作者： Roger J. Green Zeina Rihawi Zaiton Abdul Mutalip Mark S. Leeson Matthew D. Higgins School of Engineering University of Warwick Coventry UK

ISBN: (纸本)9781467322287

Vehicular communications have become an attraction field to researchers in different sectors; from electronic systems, then communication technologies, automotive control systems, to network topology developers. Control, audio and video signals are circulated within a vehicle using wired and wireless networks. Optical Wireless (OW) technology has started to be used in intra-satellite links and aircraft, since it offers high bandwidth and resistance to electromagnetic interference (EM). As more electronic systems are being within a vehicle, EM exists, especially in the engine compartment. thus it is an attractive proposition to use OW in cars. In this paper, a review of control and multimedia systems in vehicles is presented. An overview of implementing OW in vehicles for future automotive communication technologies will also be discussed.

关键词： Wireless communication Vehicles Integrated optics High speed optical techniques Optical fiber communication Automotive engineering communication system security

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Provisioning QoE over Converged networks: Issues and Challenges

Provisioning QoE over Converged Networks: Issues and Challen...

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IEEE international conference on High Performance Computing and communications (HPCC)

作者： Hajer Gahbiche Msakni Habib Youssef PRINCE Research Unit ISITCom University of Sousse Sousse Tunisia

the last decade has seen the emergence of the concept of converged IP networks, which make use of a multitude of heterogeneous core and access networks. We have also witnessed the proliferation of numerous multimedia services such as audio/video streaming, VoIP, or IPTV. the users' satisfaction and the perceived quality are being recognized as crucial for the successful provisioning of these services over such networks. User perceived quality has become known as Quality of Experience (QoE) and standard architectural solutions have been proposed, which made recommendations as to where and how to estimate QoE at the user level. this paper introduces the reader to this important concept. the recommended metrics and approaches proposed for QoE estimations of media services over IP networks are concisely described. We also discuss the QoE challenges in converged networks.

关键词： Quality of service Streaming media Delay Multimedia communication Biological system modeling IP networks

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Cooperative Synchronization in Wireless Multi-hop communication

Cooperative Synchronization in Wireless Multi-hop Communicat...

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international conference on Computer Modeling and Simulation, UKSIM

作者： Hongmin Deng Yong Zhi Hui Hu School of Electronics and Information Engineering Sichuan University Chengdu China

Cooperative synchronization of a multi-hop wireless communication networks is investigated in this paper. First, a basic and typical dual-hop network which consists of coupled chaotic systems is discussed, and synchronization has been achieved via the nonlinear integral control method. On the basis of this model, the study of the cooperative synchronization is extended to the multi-hop networks. Two network topologies, namely the MESH network structure and the MOORE neighborhood structure, are considered. Also, the nonlinear feedback integral method is used as the control law. Simulation results demonstrate the effectiveness of modeling the communication networks and the perfect synchronization of the multi-hop network consisting of chaotic nodes.

关键词： Synchronization Spread spectrum communication Chaotic communication Wireless sensor networks Couplings Ad hoc networks

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A method for assessing quality of service in broadband networks

A method for assessing quality of service in broadband netwo...

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14th international conference on Advanced communication Technology, ICACT 2012

作者： Bujlow, Tomasz Riaz, Tahir Pedersen, Jens Myrup Section for Networking and Security Department of Electronic Systems Aalborg University DK-9220 Aalborg East Denmark

ISBN: (纸本)9788955191639

Monitoring of Quality of Service (QoS) in high-speed Internet infrastructure is a challenging task. However, precise assessments must take into account the fact that the requirements for the given quality level are service-dependent. Backbone QoS monitoring and analysis requires processing of large amount of the data and knowledge of which kind of application the traffic belongs to. To overcome the drawbacks of existing methods for traffic classification we proposed and evaluated a centralized solution based on C5.0 Machine Learning Algorithm (MLA) and decision rules. the first task was to collect and provide C5.0 high-quality training data, divided into groups corresponding to different types of applications. It was found that currently existing means of collecting data (classification by ports, Deep Packet Inspection, statistical classification, public data sources) are not sufficient and they do not comply with the required standards. To collect training data a new system was developed, in which the major role is performed by volunteers. Client applications installed on their computers collect the detailed data about each flow passing through the network interface, together with the application name taken from the description of system sockets. this paper proposes a new method for measuring the Quality of Service (QoS) level in broadband networks, based on our Volunteer-Based System for collecting the training data, Machine Learning Algorithms for generating the classification rules and application-specific rules for assessing the QoS level. We combine both passive and active monitoring technologies. the paper evaluates different implementation possibilities, presents the current implementation of particular parts of the system, their initial runs and obtained results, highlighting parts relevant from the QoS point of view. © 2012 GIRI.

关键词： Quality of service

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Survey of Extended LEACH-Based Clustering Routing Protocols for Wireless Sensor networks

Survey of Extended LEACH-Based Clustering Routing Protocols ...

引用

IEEE international conference on High Performance Computing and communications (HPCC)

作者： M. Aslam N. Javaid A. Rahim U. Nazir A. Bibi Z.A. Khan Department of Electrical Engineering COMSATS Institute of Information Technology Islamabad Pakistan Faculty of Engineering Dalhousie University Halifax Canada

ISBN: (纸本)9781467321648

An energy efficient routing protocol is the major concern in Wireless Sensor networks (WSNs). In this survey paper, we present energy efficient hierarchical routing protocols, developed from conventional LEACH routing protocol. Main focus of our study is how these extended protocols work in order to increase the life time and how quality routing protocol are improved for WSNs. Furthermore, this paper also highlights some of the issues faced by LEACH and also explains how these issues are tackled by extended versions of LEACH. We compare the features and performance issues of the selected hierarchical routing protocols.

关键词： Routing protocols Wireless sensor networks Sensors Base stations Energy consumption Spread spectrum communication Batteries

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Efficient Handling of Arrays in Dataflow Process networks

Efficient Handling of Arrays in Dataflow Process Networks

引用

IEEE international conference on High Performance Computing and communications (HPCC)

作者： Daniel Baudisch Jens Brandt Klaus Schneider Embedded Systems Group Department of Computer Science University of Kaiserslautern Germany

ISBN: (纸本)9781467321648

Dataflow process networks (DPN) have been proposed as a programming model for distributed parallel systems that have communication paths with unpredictable latencies. the purely data-driven execution of DPNs does not require a global coordination and therefore allows one to easily map DPNs to many parallel hardware and software architectures with distributed memories. Problems due to shared memory communication like data races do not exist since the communication is done via point-to-point FIFO buffers between the process nodes. On the other hand, this distributed programming model leads to high communication costs if large data structures like arrays have to be communicated between nodes. this paper addresses the reduction of the communication costs due to arrays that are processed by -- and therefore sent between -- DPN nodes. the presented methods are given at a high level of abstraction and do not impose specific constraints on the used target architectures. Our experimental results show clearly the advantage of our approach compared to the standard message passing between the nodes.

关键词： Arrays Computational modeling Writing Embedded systems Programming Hardware

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DPPM FSO communication systems impaired by turbulence, pointing error and ASE noise

DPPM FSO communication systems impaired by turbulence, point...

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international conference on Transparent Optical networks

作者： Abisayo O. Aladeloba Andrew J. Phillips Malcolm S. Woolfson Division of Electrical Systems and Optics University of Nottingham University Park UK

ISBN: (纸本)9781467322287

Performance analyses, using a modified Chernoff bound on the bit error rate, are given for an optically preamplified digital pulse position modulation (DPPM) free-space optical (FSO) communication system impaired by pointing error and atmospheric turbulence combined, in addition to the amplified spontaneous emission noise arising from the optical amplification. An improvement of about 7-9 dB (depending on the turbulence level) can be potentially achieved using the DPPM scheme over an equivalent on off keyed nonreturn-to-zero based FSO system.

关键词： Bit error rate Optical pulses Optical receivers Integrated optics Noise Adaptive optics Optical fiber communication

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