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15th International Conference on System Theory, control and Computing, ICSTCC 2011

作者： Apostol, Bogdan Manta, Vasile Faculty of Automatic Control and Computer Engineering Technical University Gheorghe Asachi Iasi Str. Prof. dr. doc. Dimitrie Mangeron nr. 27 Iasi cod 700050 Romania

ISBN: (纸本)9781457711732

Seamless simulation and rendering of realistic natural environments has the goals of modeling the terrain and placing large groups of plants in a manner that would generate a scene similar to what a viewer would see in real life. The placement of plants is derived automatically from real land cover classification (LCC) data which describes each area on the map as a single vegetation type. This work presents a method for solving the problem of plant distribution in transition areas between different vegetation classes by using the concept of linear diffusion in an arbitrary direction. In practice this direction can be determined by different climatic factors. Our proposed implementation can accurately process a high number of neighboring areas in real-time by using parallel processing on the graphics processing unit. © 2011 faculty of Auto control.

关键词： Graphics processing unit

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Intelligent diagnostics of devices with the use of infrared mapping images

Intelligent diagnostics of devices with the use of infrared ...

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International Students Conference on Electrodynamics and Mechatronics (SCE III)

作者： R. Gasz Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology Opole Poland

A correct diagnostics together with the early prediction of failure or malfunction of the system are the major issues in modern maintenance. Nowadays, the time-honored diagnostics may be inadequate and lead to omitting failures, resulting in higher costs of repairing damaged equipment. That is why the interest in intelligent diagnostics increases due to the possibility of better interpretation of the component status and early failure prediction. One of the ways of determining the device condition is to measure and analyze the temperature of multiple points on the device. Thermographics may show a beginning of significant wear of a component, and enable a repair or replacing before the failure appears. The paper presents the key aspects of the diagnostics with thermal images, including: technology mapping, mapping algorithms, together with a presentation of available software solutions.

关键词： Maintenance engineering Buildings Interpolation Temperature measurement Imaging Computational modeling Electrodynamics

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Linear diffusion for generating plant distribution in natural environment simulation

Linear diffusion for generating plant distribution in natura...

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

作者： Bogdan Apostol Vasile Manta Faculty of Automatic Control and Computer Engineering Technical University of Gheorghe Asachi of Iasi Iasi Romania

关键词： Rendering (computer graphics) Vegetation mapping Graphics processing unit Ecosystems Hardware Real time systems Computational modeling

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An evolutionary optimization framework for intelligent agents

An evolutionary optimization framework for intelligent agent...

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

作者： Florin Leon Bogdan I. Aignătoaiei Andrei D. Leca Automatic Control and Computer Engineering Faculty Technical University of Gheorghe Asachi of Iasi Iasi Romania

Evolutionary algorithms have become popular in the recent years as a general, simple, and robust technique that can be used when other optimization methods cannot be applied. Presently, there are a number of evolutionary/genetic algorithm libraries publicly available; however, they are not specifically designed for multiagent systems. The framework described in this paper addresses this problem and presents a general architecture for evolutionary optimization aimed to be used by agents in a multiagent system implemented in the JADE framework inspired from the island model of parallel genetic algorithms. The characteristics of evolutionary algorithms that are more appropriate for use in a distributed, cooperative multiagent environment are also identified.

关键词： Evolutionary computation Optimization Genetic algorithms Multiagent systems computer architecture Biological cells Genetics

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A reliable-Adaptive scheduler for computational grids with failure recovery and rescheduling mechanisms

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International Journal of Grid and Utility Computing 2011年第1期2卷 59-75页

作者： Sarhan, Amany Saleh, Ahmed I. Hamed, Amr M. Computer Engineering and Automatic Control Department Faculty of Engineering Tanta University Tanta Egypt Computer Engineering and Systems Department Faculty of Engineering Mansoura University P.O. Box 72 Mansoura Egypt

Computational grids (CGs) have become an attractive research area as they suggest a suitable environment for developing large scale parallel applications. CGs integrate a large amount of distributed heterogeneous resources into a single powerful platform. However, to make good use of CGs, grid resources should be scheduled efficiently. Various scheduling strategies have been introduced, including static and dynamic behaviours. The former maps tasks to resources at submission time, while the latter operates at schedule time. While static scheduling is unsuitable for the dynamic grid environment, scheduling in CGs is still more complex than the proposed dynamic ones. This paper introduces a decentralised adaptive grid scheduler (AGS) based on a novel rescheduling mechanism. AGS has several salient properties as it is;hybrid, adaptive, decentralised, and efficient. AGS is also robust as it has the ability to: 1 detect resource failures 2 continue its functionality in spite of the failure existence 3 recover back as soon as possible. Moreover, it integrates both static and dynamic scheduling behaviours. An initial static scheduling map is proposed for an input directed acyclic graph (DAG). However, DAG tasks may be rescheduled if the hosting resources' performance changes in a way that affects the tasks' response time. AGS tries to overcome drawbacks of traditional schedulers by utilising the mobile agent unique features to enhance the resource discovery and monitoring processes. Experimental results have shown that AGS outperforms traditional grid schedulers as it introduces a better scheduling efficiency. © 2011 Inderscience Enterprises Ltd.

关键词： Mobile agents

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A clustering algorithm for negotiating security in wireless mesh networks

A clustering algorithm for negotiating security in wireless ...

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

作者： N. Botezatu V. Manta G. Vieriu Faculty of Automatic Control and Computer Engineering Gh. Asachi Technical University of Iasi Romania

Wireless networks rely greatly on security for authentication and confidentiality, due to the use of an open communication medium. The tendency to incorporate wireless capabilities in battery powered hand-held devices makes it difficult to enforce security because of computational resources and battery capacity limitations. One approach to this problem consists in adaptable security mechanisms: different security algorithms may be enforced at any given time, to assure a proper level of protection, while respecting constraints on power and resource consumption. This paper presents such a mechanism (CLASS), which uses a clustering scheme to setup homogenous security areas in the network. The scheme is based on the available energy at every node and on the individual security requirements. By proper assignment of the nodes and by proper selection of security, we show that our method significantly reduces the average energy consumption compared to a heterogeneous network.

关键词： Peer to peer computing Energy consumption Throughput Clustering algorithms Wireless mesh networks Encryption

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ORF-MOSAIC for adaptive control of a biomimetic arm

ORF-MOSAIC for adaptive control of a biomimetic arm

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2011 IEEE International Conference on Robotics and Biomimetics, ROBIO 2011

作者： Ardakani, M. Mahdi Ghazaei Jörntell, Henrik Johansson, Rolf Department of Computer Science Faculty of Engineering Lund University 221 00 Lund Sweden Department of Experimental Medical Sciences Lund University Biomedical Center F10 221 84 Lund Sweden Department of Automatic Control Faculty of Engineering Lund University 221 00 Lund Sweden

ISBN: (纸本)9781457721373

This study is an attempt to take advantage of a cerebellar model to control a biomimetic arm. The cerebellar controller is a modified MOSAIC model which adaptively controls the arm. We call this model ORF-MOSAIC (Organized by Receptive Fields MOdular Selection And Identification for control). The arm features a musculoskeletal model which is controlled through muscle activations by means of optimization techniques. With as few as 16 modules, we were able to control the arm in a workspace of 30 x 30 cm. The system was able to adapt to an external field as well as handling new objects despite delays. The discussion section suggests that there are similarities between the microzones in the cerebellum and the modules of this new model. © 2011 IEEE.

关键词： Biomimetics

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The Fast Itemset Miner: A detailed analysis of the candidate generation stages

The Fast Itemset Miner: A detailed analysis of the candidate...

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

作者： Alexandru Archip Mitică Craus Faculty of Automatic Control and Computer Engineering Gheorghe Asachi Technical University of Ia&i Romania

Association Rule Mining (ARM) represents an important tool for Data Mining techniques. A key step in ARM is to determine the frequent itemsets present within the analyzed data. Recent algorithms addressing this problem focus on identifying frequent itemsets without candidate generation steps. This paper details a new algorithm - Fast Itemset Miner (FIM for short) - that still relies on candidate generation stages, but has a different approach from the standard Apriori algorithm. This approach focuses on increasing size of the interval that candidates belong to, rather than increasing the size of the candidates by one with each corresponding iteration. By comparing the Apriori and FIM candidate generation stages, we show that this second approach uses a faster and more efficient method of determining candidate itemsets. Moreover, such an approach also favors a better support counting method, which greatly impacts on the overall time response of the FIM algorithm.

关键词： Itemsets Equations Association rules Mathematical model Algorithm design and analysis

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Monocular visual self-localization for humanoid soccer robots

Monocular visual self-localization for humanoid soccer robot...

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International Conference on Electronics, Communications and computers (CONIELECOMP)

作者： J.M. Ibarra Zannatha R. Cisneros Limón A.D. Gómez Sánchez E. Hernández Castillo L.E. Figueroa Medina F.J.K. Lara Leyva Departament of Automatic Control Cinvestav Engineering Faculty La Salle University Departament of Computer Systems Cinvestav

In this paper a visual self-localization method for a humanoid robot is presented. This one is based on monocular information. The goal of this method is to obtain the position (x; y) and orientation θ of the humanoid robot inside the field of play. The methods proposed include some digital image processing algorithms and geometric interpretation to perform a 3D monocular reconstruction, that allows to measure the relative position between the robot and some known objects (goals and beacons), and to use them to obtain the robot's absolute position, by means of a triangulation method. Finally, the results obtained in Webots and in the real platform are presented.

关键词： Image color analysis Feature extraction Image segmentation Three dimensional displays Robots Image edge detection Pixel

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The comparative study of two analytical methods for detection and elimination of the static hazard in Combinational Logic Circuits

The comparative study of two analytical methods for detectio...

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

作者： Alexandru Valachi Bogdan I. Aignătoaiei Mihai G. Timiş Automatic Control and Computer Engineering Faculty of the Technical University Gheorghe Asachi of Ia&i Iasi Romania

In this paper, the authors do a comparative study of two methods to eliminate the static hazards from logical functions. The first method consists in determining the coupled terms and getting the term that masks the static hazards, and the second method consists in determining the masking additional term by solving a system of Boolean equations. From the presented examples, the authors deduced that the 2 nd method (solving a Boolean equations system) is more advantageous because it eliminates the heuristic nature of the first method (the determination of coupled terms) and, by solving the equations system it determines all prime implicants that needs to be added to the function's expression.

关键词： Hazards Equations Logic functions Combinational circuits Noise Steady-state Companies

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