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Ontology-based design pattern recognition

12th International Conference on Knowledge-Based Intelligent Information and engineering Systems

作者： Kirasic, Damir Basch, Danko Information Support Center University of Zagreb Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation University of Zagreb Faculty of Electrical Engineering and Computing

ISBN: (纸本)9783540855620

This paper presents ontlology-based architecture for pattern recognition in the context of static source code analysis. The proposed system has three subsystems: parser, OWL ontologies and analyser. The parser subsystem translates the input coded to AST that is constructed as an XML tree. The OWL ontologies define code patterns and general programming concepts. The analyser subsystem constructs instances of the input code as ontology individuals and asks the reasoner to classify them. The experience gained in the implementation of the proposed system and some practical issues are discussed. The recognition system successfully integrates the knowledge representation field and static code analysis. resulting in greater flexibility of the recognition system.

关键词： knowledge-based system ontology-based system static code analysis description logics OWL application formal pattern definition

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An unsupervised Learning method for an attacker agent in robot soccer competitions based on the Kohonen Neural Network

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International Journal of engineering, Transactions A: Basics 2008年第3期21卷 255-268页

作者： Mirmomeni, M. Yazdanpanah, M.J. Control and Intelligent Processing Center of Excellence College of Engineering School of Electrical and Computer Engineering Tehran University P.O. Box 14395-515 Tehran Iran

RoboCup competition as a great test-bed, has turned to a worldwide popular domains in recent years. The main object of such competitions is to deal with complex behavior of systems which consist of multiple autonomous agents. The rich experience of human soccer player can be used as a valuable reference for a robot soccer player. However, because of the differences between real and simulated soccer world, it needs to fit such precious transcendental knowledge to use in the simulated soccer game. On the other hand, Reinforcement Learning (RL) as a common method in this domain because of its trial-and-error nature does not have great performance in using transcendental knowledge. Thus, this method is limited to complex multi-agent learning problems. Among various frameworks of intelligences, in general, Artificial Neural Networks (ANN) and specially Kohonen neural networks with its feed-forward architecture and its ability in discovering any relationships of interest that may exist in the input data may be considered as a powerful tool in clustering. This paper puts forward an unsupervised learning method based on Kohonen network to create a powerful Tactics layer in decision-making section for an attacker agent. The approach presented in this paper is based on the combination of expert's knowledge and data obtained from the simulated world. This system is applied to the attacker agents of ULA 2006 soccer team. Simulation results revealed that the chosen approach is superior with respect to the other intelligent techniques.

关键词： Decision making

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Modelling time dependent swelling potential of mudrock using laboratory tests and artificial neural network

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Transactions of the Institutions of Mining and Metallurgy, Section A: Mining Technology 2008年第1期117卷 32-41页

作者： Doostmohammadi, R. Moosavi, M. Araabi, B.N. Mining Engineering Department Zanjan University 5 km Tabriz road Zanjan Iran School of Mining Engineering University of Tehran Iran Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Iran

The focus of this research work is modelling time dependent swelling strain and pressure simultaneously in weak rock. Various swelling potential under different boundary conditions is considered. Free and semiconfined swelling strain and swelling pressure under oedometric condition are the most proposed tests for determination of the swelling potential of weak rock. In this paper, a modified swelling strain and pressure test is introduced using springs to provide deformable axial stiffness. The swelling strain and pressure of mudrock are modelled by artificial neural network for various swellable clay, carbonate, initial water content and different boundary stiffness, by using a combination of the proposed modified test along with the existing tests. This method correlates the results of laboratory tests with an acceptable accuracy. The proper operation of the developed model for predicting the time dependent swelling strain and pressure of mudrock under deformable and rigid axial boundaries is confirmed. © 2008 Institute of Materials, Minerals and Mining.

关键词： Neural networks

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Farsi text classification using N-grams and knn algorithm a comparative study

Farsi text classification using N-grams and knn algorithm a ...

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2008 International Conference on Data Mining, DMIN 2008

作者： Bina, Bahareh Ahmadi, Mohamad Hasan Rahgozar, Maseud Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran

ISBN: (纸本)1601320620

This paper presents the results of automated classifying Farsi text documents using tri-gram, quad-gram, and word frequency statistics methods. Three similarity/dissimilarity measures, namely, "Manhattan Distance", "Dice measure", and "Dot Product" are used for comparison purpose. K-nearest neighbors learning technique is employed and effects of removing or maintaining stop words are also studied. Results, stated in terms of precision and recall, show that applying quad-grams using dot product similarity measure while stop words are omitted, gives the best result among all of the combinations of the applied methods.

关键词： Text processing

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Upper bounds for the secure key rate of the decoy-state quantum key distribution

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Physical Review A 2009年第3期79卷 032335-032335页

作者： Marcos Curty Tobias Moroder Xiongfeng Ma Hoi-Kwong Lo Norbert Lütkenhaus Department of Signal Theory and Communications ETSI Telecomunicación University of Vigo Campus Universitario E-36310 Vigo (Pontevedra) Spain Institute for Quantum Computing University of Waterloo Waterloo Ontario Canada N2L 3G1 Quantum Information Theory Group Institut für Theoretische Physik I and Max-Planck Research Group Institute of Optics Information and Photonics University of Erlangen–Nürnberg 91058 Erlangen Germany Department of Electrical and Computer Engineering and Department of Physics Center for Quantum Information and Quantum Control (CQIQC) University of Toronto Toronto Ontario Canada M5S 3G4

The use of decoy states in quantum key distribution (QKD) has provided a method for substantially increasing the secret key rate and distance that can be covered by QKD protocols with practical signals. The security analysis of these schemes, however, leaves open the possibility that the development of better proof techniques or better classical postprocessing methods might further improve their performance in realistic scenarios. In this paper, we derive upper bounds on the secure key rate for decoy-state QKD. These bounds are based basically only on the classical correlations established by the legitimate users during the quantum communication phase of the protocol. The only assumption about the possible postprocessing methods is that double click events are randomly assigned to single click events. Further, we consider only secure key rates based on the uncalibrated device scenario which assigns imperfections such as detection inefficiency to the eavesdropper. Our analysis relies on two preconditions for secure two-way and one-way QKD. The legitimate users need to prove that there exists no separable state (in the case of two-way QKD) or that there exists no quantum state having a symmetric extension (one-way QKD) that is compatible with the available measurements results. Both criteria have been previously applied to evaluate single-photon implementations of QKD. Here we use them to investigate a realistic source of weak coherent pulses. The resulting upper bounds can be formulated as a convex optimization problem known as a semidefinite program which can be efficiently solved. For the standard four-state QKD protocol, they are quite close to known lower bounds, thus showing that there are clear limits to the further improvement of classical postprocessing techniques in decoy-state QKD.

关键词： Quantum cryptography

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Minimizing the impact of transients of capacitive voltage transformers on distance relay

Minimizing the impact of transients of capacitive voltage tr...

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2008 Joint International Conference on Power System Technology POWERCON and IEEE Power India Conference, POWERCON 2008

作者： Badrkhani Ajaei, F. Sanaye-Pasand, M. School of Electrical and Computer Engineering college of Engineering University of Tehran Tehran 14395-515 Iran Control and Intelligent Processing Center f Excellence ECE School University of Tehran Iran

ISBN: (纸本)9781424417629

Transient response of Coupling Capacitor Voltage Transformers (CCVT) can result in malfunctions of fast impedance relays such as overreaching, underreaching or direction errors. Detailed model of a practical CCVT is used in this paper for simulation of input source error of the distance relay caused by the transient response of the CCVT. This paper describes an improved phasor estimation technique based on least squares method for estimation of voltage and current phasors in distance relays. The method minimizes the impact of transient oscillations of the CCVT output voltage on operation of distance relay during faults. The algorithm performance is evaluated during various fault conditions. The proposed method provides higher tripping speed for close-in faults in addition to solving the overreaching problem for systems with high Source to line Impedance Ratio (SIR). © 2008 IEEE.

关键词： Transient analysis

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Towards effective automatic parallelization for multicore systems

Towards effective automatic parallelization for multicore sy...

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IPDPS 2008 - 22nd IEEE International Parallel and Distributed Processing Symposium

作者： Bondhugula, Uday Baskaran, Muthu Hartono, Albert Krishnamoorthy, Sriram Ramanujam, J. Rountev, Atanas Sadayappan, P. Dept. of Computer Science and Engineering Ohio State University 2015 Neil Ave. Columbus OH United States Dept. of Electrical and Computer Engg. Center for Computation and Technology Louisiana State University

ISBN: (纸本)9781424416943

The ubiquity of multicore processors in commodity computing systems has raised a significant programming challenge for their effective use. An attractive but challenging approach is automatic parallelization of sequential codes. Although virtually all production C compilers have automatic shared-memory parallelization capability, it is rarely used in practice by application developers because of limited effectiveness. In this paper we describe our recent efforts towards developing an effective automatic parallelization system that uses a polyhedral model for data dependences and program transformations. ©2008 IEEE.

关键词： C (programming language)

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Mean square stability analysis of sampled-data supervisory control systems

Mean square stability analysis of sampled-data supervisory c...

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17th IEEE International Conference on control Applications, CCA

作者： Tejada, Arturo Herencia-Zapana, Heber González, Oscar R. Steven Gray, W. Delft Center for Systems and Control TU Delft Netherlands Department of Electrical and Computer Engineering Old Dominion University Norfolk VA 23529-0246 United States

ISBN: (纸本)9781424422234

Testable second moment stability conditions for discrete-time supervisory control systems were recently developed using the Hybrid Jump Linear Systems (HJLS's) framework. These tests are extended here to sampled-data supervisory control systems using the new sampled-data HJLS (SD-HJLS) framework. It is shown first that the p-moment stability of SD-HJLS's equipped with ideal sample and hold operators is equivalent to that of their associated HJLS's. Then, the second moment stability analysis tools developed for HJLS 's are extended to SD-HJLS's. Finally, the results are illustrated through a Monte Carlo simulation of a simple example. © 2008 IEEE.

关键词： Monte Carlo methods

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Motion Estimation of a Mobile Robot using different types of 3D Sensors

Motion Estimation of a Mobile Robot using different types of...

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4th International Conference on Autonomic and Autonomous Systems

作者： Netramai, Chayakorn Oleksandr, Melnychuk Joochim, Chanin Roth, Hubert Center for Sensor Systems (ZESS) University of Siegen D-57076 Paul-Bonatz-Strasse 9-11 Germany Institute of Automatic Control Engineering Department of Electrical Engineering and Computer Science University of Siegen D-57068 Hoelderlinstrasse 3 Germany

ISBN: (纸本)9781424442355

Motion estimation is one of the most important tasks for autonomous mobile robots. Modern mobile robots are equipped with different types of visual sensors that can provide wide ranges of outputs which can be used as reliable inputs for the computing of the robots displacement. One of the widely used visual sensors on mobile robots is the stereo camera due to its simplicity and availability. However, the recently invented Photonic Mixer Device (PMD) that uses the time of flight principle, also becomes more and more popular because of its robustness against ambient light and weak textured surfaces. This paper introduces the compared results of the motion estimation using two different types of 3D sensors (stereo and PMD) and also suggests a new approach to fuse their data in order to improve the calculation accuracy. An experiment was conducted using a mobile robot where the motion of the robot was evaluated using a least square technique. The results from each sensor were obtained and compared to prove their capability toward the motion estimation task.

关键词： Mobile robots

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Amazon S3 for science grids: A viable solution?

Amazon S3 for science grids: A viable solution?

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2008 International Workshop on Data-aware Distributed Computing 2008, DADC'08

作者： Palankar, Mayur Lamnitchi, Adriana Ripeanu, Matei Garfinkel, Simson Computer Science and Engineering University of South Florida Tampa FL 33620 United States Electrical and Computer Engineering University of British Columbia Vancouver BC V6T 1Z4 Canada Center for Research on Computation and Society Harvard University Cambridge MA United States

ISBN: (纸本)9781605581545

*** has introduced the Simple Storage Service (S3), a commodity-priced storage utility. S3 aims to provide storage as a low-cost, highly available service, with a simple 'pay-as-you-go' charging model. This article makes three contributions. First, we evaluate S3's ability to provide storage support to large-scale science projects from a cost, availability, and performance perspective. Second, we identify a set of additional functionalities that storage services targeting data-intensive science applications should support. Third, we propose unbundling the success metrics for storage utility performance as a solution, to reduce storage costs. Copyright 2008 ACM.

关键词： Costs

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