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Automatika 2012年第2期53卷 103-106页

作者： Martínez-Salamero, Luis Milanovič, Miro Rovira i Virgili University School of Electrical and Computer Engineering Department of Electrical Electronic and Automatic Control Engineering Spain University of Maribor Faculty of Electrical Engineering and Computer Science Institute for Robotics Slovenia

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Performance evaluation of job scheduling algorithms in P2P distributed systems

Performance evaluation of job scheduling algorithms in P2P d...

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The International Conference on Informatics and Systems (INFOS)

作者： Tarek Helmy Elsayed Sallam College of Computer Science and Engineering King Fahd University of Petroleum and Minerals Dhahran 31261 Mail Box 413 Saudi Arabia Faculty of Engineering Department of Computers & Automatic Control Engineering Tanta University Egypt

Peer-to-Peer (P2P) distributed systems have received considerable attention mainly due to their potential for high-performance and high-reliability. Job scheduling in P2P distributed systems is one of the most important issues. In this paper, we have evaluated the performance of four job scheduling algorithms named Random, Round Robin, Number of Connections and Server Load in P2P distributed computing environment. The aim of the performance evaluation is to provide a comprehensive view of what performance can be expected from these algorithms in P2P systems in terms of CPU utilization, task processing, traffic received and traffic sent at different load scenarios. We used OPNET modeler to build the simulation model for FTP application on the P2P distributed systems. The output of the performance comparison illustrates different QoS (Quality of Service) aspects of these basic algorithms under different workloads and traffic settings. The results show that the performance of each algorithm changes according to the operational environment setting. The simulation results show that the Server Load-based scheduling algorithm has the best performance among the four algorithms followed by the Number of Connections-based scheduling algorithm. Simulations also show that the Server Load scheduling policy is not suitable for heavy load situations and the Random algorithm is suitable for some settings, especially in the low load situation.

关键词： Portable document format IEEE Xplore

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Wireless remote monitoring system for patients with cardiac pacemakers

Wireless remote monitoring system for patients with cardiac ...

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International Conference and Exposition on Electrical and Power engineering (EPE)

作者： Cristian Rotariu Vasile Manta Haritan Costin Faculty of Automatic Control and Computer Engineering Gheorghe Asachi Technical University of Iasi Iasi Romania Faculty of Medical Bioengineering Grigore T. Popa University of Medicine and Pharmacy of Iasi Iasi Romania

This paper describes the design and implementation of a wireless remote monitoring system for patients with temporary cardiac pacemakers. The system is built around a low power cardiac pacemaker with wireless data transmission capability, used for patient monitoring in to a limited area. The proposed system is designed to be used in emergency situations, in healthcare institutes, helping to keep the patient's heartbeat stable. The status of each heartbeat is wirelessly transmitted to a monitoring station via a wireless sensor network. The monitoring station runs a patient monitor application that receives the data from wireless sensor network and activates the alarms when these values exceed the preset limits. An experimental wireless pacemaker was implemented and tested.

关键词： Pacemakers Wireless sensor networks Wireless communication Monitoring Batteries Heart rate

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Sentiment Analysis of Health and Nutrition Tweets using Support Vector Machines

Sentiment Analysis of Health and Nutrition Tweets using Supp...

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2012年互联网技术与应用国际学术会议

作者： Tarek Helmy Information and Computer Science Department College of Computer Science and EngineeringKing Fahd University of Petroleum and MineralsDhahran 31216Mail Box.413Saudi Arabia Faculty of Engineering Department of Computers Engineering & Automatic ControlTanta UniversityEgypt

Sentiment analysis refers to a broad area of natural language processing,computational linguistics and text mining.A successful sentiment analysis model based on Twitter,the popular social networking and micro blogging service,could provide useful information to the Internet users due to its realtime *** instance,Twitter can be a resource for people interested in staying up on diet and *** work is a part of a project where we are developing a framework for semantic manipulation of health and nutrition *** analysis and classification are keys to the intelligent search process especially in a critical area like health and nutrition. Sentiment analysis in this paper refers to the task of classifying opinionated health and nutrition tweets as either positive or negative according to the overall sentiment expressed by the *** paper presents an experimental study of using support vector machines for sentiment analysis in the health and nutrition domain of *** results demonstrate the applicability of support vector machines to Twitter sentiment analysis and emphasize the importance of preprocessing due to the unique attributes of tweets.

关键词： Sentiment Analysis and Classfication Natural Language Processing Support Vector Machines

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Fuzzy watershed algorithm: An enhanced algorithm for 2D gel electrophoresis image segmentation

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International Journal of computer Science Issues 2012年第2 2-3期9卷 561-577页

作者： Rashwan, Shaheera Sarhan, Amany Faheem, Muhamed Talaat Youssef, Bayumy.A. Informatics Research Institute City for Science and Technology Borg ElArab Alexandria Egypt Computer science and Automatic Control Engineering Department Faculty of Engineeing University of Tanta Tanta Egypt EE dept-Faculty of Engineering Taif University Saudi Arabia

An important issue in the analysis of two-dimensional electrophoresis images is the detection and quantification of protein spots. The main challenges in the segmentation of 2DGE images are to separate overlapping protein spots correctly and to find the abundance of weak protein spots. To enable comparison of protein patterns between different samples, it is necessary to match the patterns so that homologous spots are identified. In this paper, we describe a new robust technique to segment and model the different spots present in the gels. The Watershed segmentation algorithm is modified to handle the problem of over segmentation by initially partitioning the image to mosaic regions using the composition of fuzzy relations. The experimental results showed the effectiveness of the proposed algorithm to overcome the over segmentation problem associated with the available algorithm. We also use a wavelet denoising function to enhance the quality of the segmented image. The parameters of the wavelet function are obtained using the Genetic Algorithm search technique. The results of using the denoising function before the proposed Fuzzy Watershed segmentation algorithm is very promising as they are better than those without denoising. © 2012 International Journal of computer Science Issues.

关键词： Image segmentation

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Towards safe physical human-robot interaction: An online optimal control scheme

Towards safe physical human-robot interaction: An online opt...

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IEEE International Workshop on Robot and Human Communication (ROMAN)

作者： Sholeh Norouzzadeh Tamara Lorenz Sandra Hirche Institute of Automatic Control Engineering Faculty of Electrical Engineering and Computer Science Technische Universität München Munich Germany Experimental Psychology Ludwig-Maximilians-Universität München Munich Germany

Operating in the proximity of humans has been a long-term challenge in robotics research. To achieve this objective, one of the main issues is to ensure safe and comfortable physical human-robot interaction (pHRI). In this paper, we tackle the safety problem at the control level. To ensure operation is within perceived safe zone, we use model predictive control, which finds the optimal control signal online, while imposing predefined safety constraints on the robotic system. The strength of this method lies in allowing the system to perform close to, or at the edge of the constraints' boundaries. In contrast to other works we consider here perceived safety; the constraints for perceived safety are derived in a competitive pHRI experiment. The perceived safety and comfort of the proposed approach is then evaluated with a second, game-like pHRI experiment.

关键词： Force Humans Safety Robots Optimization Optimal control Force measurement

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Experimental verification of constrained iterative learning control using successive projection

Experimental verification of constrained iterative learning ...

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2012 UKACC International Conference on control, control 2012

作者： Chu, Bing Cai, Zhonglun Owens, David H. Rogers, Eric Freeman, Chris T. Lewin, Paul L. Electronics and Computer Science University of Southampton Southampton SO17 1BJ United Kingdom Faculty of Engineering and the Environment University of Southampton Southampton SO17 1BJ United Kingdom Department of Automatic Control and Systems Engineering University of Sheffield Sheffield S1 3JD United Kingdom Italian Institute of Technology Via Morego 30 16163-Genova Italy

ISBN: (纸本)9781467315609

In many practical applications, constraints are often present on, for example, the magnitudes of the control inputs. Recently, based on a novel successive projection framework, two constrained iterative learning control (ILC) algorithms were developed with different convergence properties and computational requirements. This paper investigates the effectiveness of these two methods experimentally on a gantry robot facility, which has been extensively used to test a wide range of linear model based ILC algorithms. The results obtained demonstrate the effectiveness of the algorithms in solving one form of the general constrained ILC problem. © 2012 IEEE.

关键词： Iterative methods

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Experimental verification of constrained iterative learning control using successive projection

Experimental verification of constrained iterative learning ...

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UKACC International Conference on control (control)

作者： Bing Chu Zhonglun Cai David H Owens Eric Rogers Chris T Freeman Paul L Lewin Electronics and Computer Science University of Southampton Southampton UK Faculty of Engineering and the Environment University of Southampton Southampton UK Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK Italian Institute of Technology Genoa Italy

关键词： Convergence Robots Algorithm design and analysis Prediction algorithms Trajectory Optimization

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Modeling fuzzy temporal criteria in database querying

Modeling fuzzy temporal criteria in database querying

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Cornelia Tudorie Mihai Vlase Cristina Nica Dan Munteanu Department of Computer and Information Technology Faculty of Automatic Control Computers Electrical Engineering and Electronics Dunãrea de Jos Galati University Romania Dunãrea de Jos Galati University Romania

Expressing user's preferences in database querying is best achieved by fuzzy modeling of linguistic terms included in selection criteria. This paper deals with temporal criteria, for querying date/time columns in classical relational databases. Fuzzy models for some linguistic terms and ways to operate with them, in order to evaluate queries, are proposed.

关键词： Pragmatics Computational modeling Relational databases Calendars computers Knowledge based systems

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Novel Hybrid Ground/Aerial Autonomous Robot

Novel Hybrid Ground/Aerial Autonomous Robot

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International Conference on Innovative engineering Systems

作者： Mahmoud Elsamanty Mohamed Fanni Ahmed Ramadan Mechatronics & Robotics Eng. Dept. School of Innovative Design Eng. Egypt-Japan University for Science and Technology E-JUST Prod. Eng. & Mechanical Design Dept. Faculty of Engineering Mansoura University Computer & Automatic Control Dept. Faculty of Engineering Tanta University

ISBN: (纸本)9781467344401

This paper presents a novel robot that combines flying and ground moving capabilities. In doing so, new applications areas for robotics are created in which these two capabilities are needed to perform the tasks. The flying motion will be based on the concept of flying mechanism of the quadrotor. Wheeled mobile platform is combined to the flying mechanism to facilitate ground motion. Transformation mechanism was developed to transform the robot from the ground motion configuration to the flying motion configuration and vice versa. The idea of this mechanism is to close the rotors' arms of the quadrotor and put them in the vertical position when the robot is used for ground motion. This is necessary to enable navigation through narrow spaces. A manipulator with 3-DOF has been added to handle objects during ground motion. After defining the appropriate mechanisms and the basic structure of the robot, geometrical dimensions and material selection of each part are decided. Then, CAD model is developed using SolidWorks, and an iterative process has been carried out to enhance and develop the robot structure and the transformation mechanism. The CAD model was tested using the finite element method in ANSYS14 where static structural study is performed. Finally, motors, sensors and control system hardware were selected for this robot. The analysis indicates the feasibility of the proposed robot.

关键词： Flying robot Mobile robot Finite element anlysis Manipulators control system. aerospace robotics Manipulators Robot control systems Mobile robots Ground motion Flying control system hardware Finite element method Autonomous robots basic structure Materials selection

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