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Agent placement in wireless embedded systems: Memory space and energy optimizations

Agent placement in wireless embedded systems: Memory space a...

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IEEE International Symposium on Parallel and Distributed Processing Workshops and Phd Forum (IPDPSW)

作者： Nikos Tziritas Thanasis Loukopoulos Spyros Lalis Petros Lampsas Computer & Communication Engineering Department University of Thessally Volos Greece Centre for Research and Technology슠Thessaly Volos Greece Department of Informatics & Computer Technology Technological Educational Institute of Lamia Lamia Greece

ISBN: (纸本)9781424465330

Embedded applications can be structured in terms of mobile agents that are flexibly installed on available nodes. In wireless systems, such nodes typically have limited battery and memory resources; therefore it is important to place agents judiciously. In this paper we tackle the problem of placing a newcomer agent in such a system. The problem has two main components. First, enough memory space must be found or created at some node to place the agent. Second, the placement should be energy efficient. We present heuristics for tackling these two goals in a stepwise fashion, as well as a branch and bound method for achieving both goals at the same time. Our algorithms are centralized assuming a single entry point through which agents are injected into the system, with adequate knowledge of the system state and enough resources to run the proposed algorithms. The algorithms are evaluated under different simulated scenarios, and the tradeoffs across the two metrics (space, energy) are identified.

关键词： Embedded system Application software Space technology Batteries Educational technology Embedded computing Home automation Wireless networks Dynamic programming Mobile communication

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An iterative approach to the robust H∞ synthesis problem with a sequence of infeasible controllers

An iterative approach to the robust H∞ synthesis problem wi...

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IEEE International Symposium on computer Aided Control System Design (CACSD)

作者： Yasushi Kami Eitaku Nobuyama Department of Electrical and Computer Engineering Akashi National College of Technology Hyogo Japan Department of Systems Design and Informatics Kyushu Institute of Technology Fukuoka Japan

This paper aims to design a robust H ∞ control system against time invariant polytopic uncertainties. In general, such robust control problems are described by parameter dependent bilinear matrix inequality (PDBMI) problems which are not tractable numerically and there are few efficient methods for solving them. In this paper, we propose an iterative approach to the robust H ∞ controller synthesis problems, which constructs a sequence of infeasible controllers. The feature of our approach is to be able to use any controller variables which may not be a robust stabilizing controller as an initial point. The efficiency of our approach is shown by a numerical example.

关键词： Robustness Iterative methods Lyapunov method Linear matrix inequalities Symmetric matrices Eigenvalues and eigenfunctions Control systems

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An exterior-point approach to the robust regional pole placement control problem with fixed-order output feedback

An exterior-point approach to the robust regional pole place...

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International Conference on Modelling, Identification and Control (ICMIC)

This paper is concerned with the robust regional pole placement control problem against time invariant polytopic uncertainties. In this paper we propose an iterative approach to design a fixed-order output feedback controller achieving the robust regional pole placement. The features of our approach are to be able to use any controller variables as an initial point and to construct a controller sequence approaching a feasible region from the outside. Numerical examples are given to show the efficiency of our approach.

关键词： Robustness

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Communication cost analysis of MBSFN in LTE

Communication cost analysis of MBSFN in LTE

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IEEE International Symposium on Personal, Indoor and Mobile radio Communications (PIMRC)

作者： Antonios Alexiou Christos Bouras Vasileios Kokkinos George Tsichritzis Computer Engineering and Informatics Department University of Patras Patras Greece Research Academic Computer Technology Institute University of Patras Patras Greece University of Patras Patras GR

Long Term Evolution (LTE) is the latest step towards the 4th generation (4G) of radio technologies designed to increase the capacity and speed of mobile communications. To support Multimedia Broadcast/Multicast Services (MBMS), LTE offers the possibility to transmit Multimedia Broadcast multicast service over a Single Frequency Network (MBSFN), where a time-synchronized common waveform is transmitted from multiple cells for a given duration. In this paper we analytically present the MBSFN delivery method and evaluate its performance. The critical parameters of primary interest for the evaluation of the scheme are the packet delivery cost and its scalability. To this direction, a telecommunication cost analysis of the MBMS service is presented based on the transmission cost over the air interface, as well as the costs of all interfaces and nodes of the MBSFN architecture. Since the performance of the MBSFN scheme mainly depends on the configuration of the LTE network that is under investigation, we consider different network topologies, MBSFN deployments and user distributions.

关键词： Synchronization Topology Interference Equations Multimedia communication Protocols

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Model transformation of metabolic networks using a Petri net based framework

Model transformation of metabolic networks using a Petri net...

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Recent Advances in Petri Nets and Concurrency, raPNeC 2010 - Workshops of the 31st International Conference on Application and Theory of Petri Nets and Other Models of Concurrency, PETRI NETS 2010 and the 10th int. conf. ACSD 2010

作者： Machado, Daniel Costa, rafael S. Rocha, Miguel Rocha, Isabel Tidor, Bruce Ferreira, Eugénio C. IBB-Institute for Biotechnology and Bioengineering Centre of Biological Engineering University of Minho Campus de Gualtar 4710-057 Braga Portugal Department of Informatics CCTC University of Minho Campus de Gualtar 4710-057 Braga Portugal Department of Biological Engineering Computer Science and Artificial Intelligence Laboratory Massachusetts Institute of Technology Cambridge MA 02139 United States

The different modeling approaches in Systems Biology create models with different levels of detail. The transformation techniques in Petri net theory can provide a solid framework for zooming between these different levels of abstraction and refinement. This work presents a Petri net based approach to Metabolic engineering that implements model reduction methods to reduce the complexity of large-scale metabolic networks. These methods can be complemented with kinetics inference to build dynamic models with a smaller number of parameters. The central carbon metabolism model of E. coli is used as a test-case to illustrate the application of these concepts. Model transformation is a promising mechanism to facilitate pathway analysis and dynamic modeling at the genome-scale level.

关键词： Petri nets

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A Statistical Learning Approach to Spatial Context Exploitation for Semantic Image Analysis

A Statistical Learning Approach to Spatial Context Exploitat...

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International Conference on Pattern Recognition

作者： Georgios Th. Papadopoulos Vasileios Mezaris Ioannis Kompatsiaris Michael G. Strintzis Centre of Research and Technology Hellas Informatics and Telematics Institute Greece Electrical & Computer Engineering Department Aristotle University of Thessaloniki Greece

In this paper, a statistical learning approach to spatial context exploitation for semantic image analysis is presented. The proposed method constitutes an extension of the key parts of the authors' previous work on spatial context utilization, where a Genetic Algorithm (GA) was introduced for exploiting fuzzy directional relations after performing an initial classification of image regions to semantic concepts using solely visual information. In the extensions reported in this work, a more elaborate approach is followed during the spatial knowledge acquisition and modeling process. Additionally, the impact of every resulting spatial constraint on the final outcome is adaptively adjusted. Experimental results as well as comparative evaluation on three datasets of varying complexity in terms of the total number of supported semantic concepts demonstrate the efficiency of the proposed method.

关键词： Context Semantics Visualization Accuracy Image analysis Gallium Statistical learning

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Vision system-based, grape leaves processing, in real time

Vision system-based, grape leaves processing, in real time

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IEEE International Workshop on Imaging Systems and Techniques (IST)

作者： Theodore P. Pachidis Ilias T. Sarafis John N. Lygouras Department of Industrial Informatics Kavala Institute of Technology Kavala Greece Department of Mechanical Engineering Kavala Institute of Technology Kavala Greece Department of Electrical and Computer Engineering Democritus University of Thrace Xanthi Greece

In this paper, automatic grape leaves processing and preparation of them (fitting of the proper cutting shapes on leaves area) to cover food industry needs, are presented. In the experimental setup, images are captured by means of a single firewire camera and a LED-based lighting system, while grape leaves are moving on a conveyor belt. For image processing, a novel software application (called NtolcutPT) has been developed in visual C++. It is based on known and novel proposed in this paper image processing algorithms and methodologies that ensure automatic leaves processing in real time, with less wastage and more reliability. Adapting the proposed system in a food industry production line the whole process can be optimized. Experimental results prove the effectiveness of this system.

关键词： Machine vision Pipelines Real time systems Food industry Firewire Image processing Fitting Shape Cameras Belts

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Investigation of the spatial spectrum of cortical contours on cross-sections of the brain

Investigation of the spatial spectrum of cortical contours o...

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10th International Conference on Information technology and Applications in Biomedicine: Emerging Technologies for Patient Specific Healthcare, ITAB 2010

作者： Graichen, Uwe Eichardt, Roland Güllmar, Daniel Haueisen, Jens Ilmenau University of Technology Faculty of Computer Science and Automation Institute of Biomedical Engineering and Informatics P.O. Box 100565 98684 Ilmenau Germany Jena University Hospital Department of Diagnostic and Interventional Radiology Medical Physics Group Philosophenweg 3 07743 Jena Germany

ISBN: (纸本)9781424465606

The human brain possesses a highly structured surface. A quantitative examination of the cortical surface is of particular interest for many questions, e.g. the investigation the relation between the spatial frequencies of cortical surfaces and spatial frequencies within Electroencephalogram and the analysis of changes of the structure of the human brain caused by diseases. In this paper a Fourier analysis approach to investigate the spatial spectrum of contour data of the cortical surface is introduced. The method was validated using artificial data with known spatial spectrum and employed to investigate the spatial frequencies of the cortical surface of a human subject. © 2010 IEEE.

关键词： Fourier analysis

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Highly optimized implementation of OpenCV for the Cell Broadband Engine

Highly optimized implementation of OpenCV for the Cell Broad...

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作者： Sugano, Hiroki Miyamoto, Ryusuke Department of Communications and Computer Engineering Graduate School of Informatics Kyoto University Yoshida-hon-machi Sakyo Kyoto 606-8501 Japan Department of Information Systems Graduate School of Information Science Nara Institute of Science and Technology 8916-5 Takayama-cho Ikoma Nara 630-0192 Japan

Recently, real-time processing of image recognition is required for embedded applications such as automotive applications, robotics, entertainment, and so on. To realize real-time processing of image recognition on such systems we need optimized libraries for embedded processors. OpenCV is one of the most widely used libraries for computer vision applications and has many functions optimized for Intel processors, but no function is optimized for embedded processors. We present a parallel implementation of OpenCV library on the Cell Broadband Engine (Cell), which is one of the most widely used high performance embedded processors. Experimental result shows that most of the functions optimized for the Cell processor are faster than functions optimized for Intel Core 2 Duo E6850 3.00 GHz. © 2010 Elsevier Inc. All rights reserved.

关键词： Image processing

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An authoring system for developing Intelligent Tutoring System

An authoring system for developing Intelligent Tutoring Syst...

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IEEE Students' technology Symposium (TechSym)

作者： Sunandan Chakraborty Devshri Roy Plaban Kumar Bhowmick Anupam Basu Secret Inria Paris-Rocquencourt Rocquencourt France Computer & Informatics Center Indian Institute of Technology Kharagpur West Bengal India Computer Science & Engineering Department Indian Institute of Technology Kharagpur West Bengal India

Intelligent Tutoring Systems (ITS) are computer-based education tools used for adaptive learning. An ITS authoring system allows teachers to create different modules of an intelligent tutoring system. In this paper, we present an ITS authoring system that allows teachers with very less computer skill to author most important modules of an ITS with minimum efforts. The salient features of the system include authoring multilingual documents, defining teaching strategies using fuzzy rules, representing student models through fuzzy state transition automata. The authoring system was used by the teachers and evaluated. The results shows fair degree of accuracy, which may further be improved by adding few more features.

关键词： Authoring systems Intelligent systems Educational technology Fuzzy systems computer science Computational intelligence informatics computer science education Systems engineering education Automata

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