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International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (SYNASC)

作者： Cristian Gratie Adina Magda Florea Computer Science Department Faculty of Automatic Control and Computers University Politehnica of Bucharest Romania

Argumentation is one of the most active domains in Artificial Intelligence, especially in multi-agent systems. Since the initial work of Dung on abstract argumentation frameworks, many semantics have been proposed, but for most practical cases argument acceptability is still a matter of choice. This paper introduces a formal model that aims to provide a unifying representation of argument extensions and thus offer a means for analyzing the relations between existing semantics. First, the generic model is described, then it is used for describing the most common argumentation semantics. Conclusions are drawn from the representation.

关键词： Semantics Biological system modeling Context Knowledge based systems Analytical models Solid modeling

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Wireless monitoring system in a safe city with Safe Mobile

Wireless monitoring system in a safe city with Safe Mobile

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International Conference on Computational Cybernetics (ICCC)

作者： D. Nasui F. A. Oana V. Sgarciu Technical Department American International Radio Inc. IL USA Faculty of Automatic Control and Computers Department of Automatic Control and Industrial Informatics UPB Bucharest Romania

ISBN: (纸本)9781424474325

This paper presents an intelligent and innovative solution of wireless monitoring of a computerized city using Safe Mobile units, based on S4I development platform. The system is using various networks of vehicular units in order to communicate with each other and with central gateway servers. The end user is accessing a client or a web hosted application for both receiving real-time data from the monitored units and sending out the commands. The major achievement of such a system is reducing the time in which an emergency situation is identified and solved.

关键词： Cities and towns Airports Gas detectors Fires Temperature sensors Computerized monitoring Mobile computing Application software Mobile communication Vehicle safety

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Vehicular Networks in a Computerized City Using Safe Mobile

Vehicular Networks in a Computerized City Using Safe Mobile

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International Conference on systems and Networks Communications (ICSNC)

作者： Nasui Dorel Oana Florentina Andra Sgarciu Valentin Oprea Bogdan Technical Department American International Radio Inc. IL USA Department of Automatic Control and Industrial Informatics Faculty of Automatic Control and Computers UPB Bucharest Romania

The paper is aimed to describe innovative assets tracking applications using Safe Mobile remote control units, based on S4I development platform. The wireless monitoring system enables different types of vehicular units to communicate with each other. Also, the units are able to contact and to be contacted by a central dispatch entity. Client or web-hosted applications, hosted on central servers, in the cloud, can be accessed by the end user both for receiving real-time data from the monitored units and sending out the commands. The system brings major achievements to the wireless communication in vehicular networks, the most important one being the reduction of the amount of time in which an emergency situation is identified and resolved.

关键词： Mobile communication Vehicles Airports Logic gates Software Sensors Driver circuits

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Scaling Peer-to-Peer testing using Linux Containers

Scaling Peer-to-Peer testing using Linux Containers

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Roedunet International Conference (RoEduNet)

作者： Mircea Bardac Răzvan Deaconescu Adina Magda Florea Automatic Control and Computers Faculty Computer Science Department Politehnica University of Bucharest Bucharest Romania

ISBN: (纸本)9781424473359

This paper presents an experimental study on the scalability of Linux Containers as a virtualization platform for evaluating Peer-to-Peer systems with real client implementations. This research identifies key features which make Linux Containers a viable solution for large-scale Peer-to-Peer virtualized infrastructures. Host resource utilization and swarm performance are evaluated for different swarm sizes, finding correlations between the virtualization solution settings and the impact on various host and peer parameters. The limits of Linux Containers are explored through experimental research, identifying directions for improving Peer-to-Peer testing in virtualized environments.

关键词： Peer to peer computing Linux Containers Protocols Hardware Internet system testing Scalability Large-scale systems Bandwidth

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Hybrid Orthosis: The Technology for Spinal Cord Injury

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Journal of Applied Sciences 2010年第22期10卷 2785-2792页

作者： Jailani, R. Tokhi, M.O. Gharooni, S. Department of Automatic Control and System Engineering University of Sheffield United Kingdom Faculty of Electrical Engineering Universiti Teknologi MARA Selangor Malaysia

Hybrid ohosis combined Functional Electrical Stimulation (FES) with a lower limb ohotic brace. The first hybrid ohosis system is introduce in 1972 and since many researchers began to produced hybrid orthosis from complex research devices to nearly commercialized products. The purpose of this study is to provide a review of hybrid ohosis available for rehabilitation of paraplegics. Ths review should provide a guide to biomedcal engineers to understand the tools developed the design characteristics, the advantages and disadvantages of hybrid ohosis that strive to improve paraplegic mobility especially in walking. © 2010 Asian Network for Scientific Information.

关键词： Functional electric stimulation

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Text line processing for high-confidence skew detection in image documents

Text line processing for high-confidence skew detection in i...

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IEEE International Conference on Intelligent Computer Communication and Processing (ICCP)

作者： Daniel Rosner Costin-Anton Boiangiu Alexandru Ştefănescu Nicolae Ţăpuş Alexandra Olteanu Computer Science Department Faculty of Automatic Control and Computers University Politehnica of Bucharest Bucharest Romania

Skew detection and correction is an important step in automated content conversion systems, on which overall system performance is dependent. Although there are many working solutions at the present time, the search for an algorithm that can achieve good error rates in a fast running time and on different layout types is still open, so new solutions for skew detection are needed. The paper at hand presents a neighbor clustering based approach that has the classical advantages of this class of algorithms - the speed, but delivers better accuracy, comparable with that of Hough based solutions.

关键词： Pixel Accuracy Clustering algorithms Estimation Nearest neighbor searches Heuristic algorithms Algorithm design and analysis

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Development of secure encoder-decoder for JPEG images

Development of secure encoder-decoder for JPEG images

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International Conference on Computer engineering and systems

作者： Ghada Hamissa Amany Sarhan Hatem Abd Elkader Mahmoud Fahmy Electrical Engineering Department Faculty of Engineering KFS University Kafr el-Sheikh Egypt Information System Department Faculty of Computer & Information Menoufia University Menoufia Egypt Computer & Automatic Control Department Computer & Automatic Control Department Tanta University Tanta Egypt Computer & Automatic Control Department Faculty of Engineering Tanta University Tanta Egypt

Digital image copyrights and image authentication draw a great attention specially in critical image communications. This paper presents a proposal for a new encoder-decoder, which we call SecEncoDeco, for securing JPEG images. An extra stage of security is embedded in the traditional JPEG codec. This security stage uses the Secure Hill cipher technique. This encryption technique has many advantages over the traditional Hill cipher. The Safe Time of the Secure Hill cipher is deduced and presented in detail. Implementation of the proposed method is built based on MATLAB. Complete evaluation for the proposed codec is performed which indicates the effectiveness of the proposed secure codec for image copyright protection.

关键词： Image coding Encryption Transform coding Computer architecture Decoding Time measurement

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Observation for non-linear uncertain systems with multiple outputs via non-homogeneous high-order sliding modes

Observation for non-linear uncertain systems with multiple o...

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2010 11th International Workshop on Variable Structure systems, VSS 2010

作者： Ríos, Héctor Dávila, Jorge Fridman, Leonid Department of Control Division of Electrical Engineering Engineering Faculty C.P. 04510 Mexico DF Mexico CINVESTAV-IPN Automatic Control Department Av. IPN 2508 Col. San Pedro Zacatenco Gustavo A. Madero Mexico DF Mexico

ISBN: (纸本)9781424458318

This article presents the problem of finite time state observation for a class of non-linear systems with multiple outputs affected by modeling uncertainties and unknown inputs. The proposed adaptable method is based on the non-homogeneous high-order sliding mode control approach. The observability is derived in terms of certain geometric restrictions on the vector fields of the system. A method for the exact reconstruction of the unknown inputs is stated. The method does not require the system to be transformed to any normal form. Simulation results support the proposed method. © 2010 IEEE.

关键词： Observability

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Parameter Optimization of FES-Assisted Indoor Rowing Exercise Using MOGA

Parameter Optimization of FES-Assisted Indoor Rowing Exercis...

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Asia International Conference on Modeling & Simulation

作者： Zakaria Hussain M. Osman Tokhi Rozita Jailani Fadzil Ahmad Department of Automatic Control and System Engineering University of Sheffield UK Faculty of Electrical Engineering Universiti Teknologi Mara Malaysia

ISBN: (纸本)9781424471966;9780769540627

This paper describes the parameter optimization of fuzzy logic control (FLC) of FES-assisted indoor rowing exercise (FES-rowing) using multi objective genetic algorithm (MOGA). The indoor rowing exercise is introduced as a total body exercise for rehabilitation of function of lower extremities through the application of functional electrical stimulation (FES). FLC is used to control the knee and elbow trajectories for smooth rowing manoeuvre. MOGA is implemented in Matlab with a dynamic simulation model of indoor rowing exercise is developed using Visual Nastran (vN4D) software environment. MOGA is used to optimize the FES-rowing with two objective functions specified that are i) to minimize the mean squared error of knee angle trajectory and ii) to minimize the total electrical stimulation required by the muscles. In view of good results obtained, it is concluded that MOGA is able to obtain the optimal design of FLC for FES-rowing with two conflicting objectives.

关键词： Knee Fuzzy logic Genetic algorithms Extremities Application software Neuromuscular stimulation Elbow Mathematical model Electrical stimulation Muscles

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Identification and control of 2DOF nonlinear helicopter model using intelligent methods

Identification and control of 2DOF nonlinear helicopter mode...

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IEEE International Conference on systems, Man and Cybernetics

作者： Jasmin Velagic Nedim Osmic Department of Automatic Control and Electronics Faculty of Electrical Engineering Sarajevo Bosnia and Herzegovina

This paper presents an implementation of soft computing methodologies, like genetic algorithm and fuzzy logic, in identification and control of 2DOF nonlinear helicopter model (Humusoft CE 150). The genetic algorithm is proposed for identification of the physical structure of helicopter system, which contains a helicopter body, main and tail motors and drivers. The quality of helicopter model achieved was validated through simulation and experimental modes. Then, this model is used to elevation and azimuth fuzzy logic Mamdani type controllers design in a simulation mode. The main objective of the paper is to obtain robust and stable controls for wide range of azimuth and elevation angles changing during the long time flight. The robustness and effectiveness of both fuzzy controllers were verified through both simulations and experiments.

关键词： Niobium Argon

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