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International Conference on control and Automation (ICCA)

作者： Hongli Dong Zidong Wang Daniel W. C. Ho Huijun Gao College of Electrical and Information Engineering Daqing Petroleum Institute Daqing China Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin China Department of Information Systems and Computing Brunei University Uxbridge Middlesex UK Department of Mathematics City University of Hong Kong Hong Kong China

ISBN: (纸本)9781424451951

In this paper, the robust finite-horizon filtering problem is investigated for a class of uncertain nonlinear discrete time-varying stochastic systems with multiple missing measurements and error variance constraints. The stochastic nonlinearities are described by statistical means which can cover several classes of well-studied nonlinearities. The measurement missing phenomenon is also considered. Sufficient conditions are derived for a finite-horizon filter to satisfy the estimation error variance constraints. These conditions are expressed in terms of the feasibility of a series of recursive linear matrix inequalities (RLMIs). An illustrative simulation example is given to show the the effectiveness of the proposed algorithm.

关键词： Robustness Filtering Time varying systems Stochastic systems Space technology Linear matrix inequalities Robust control Error correction Stochastic processes Filters

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A new procedure to improve job arrangement and the effect of practical parameters in single machine scheduling

A new procedure to improve job arrangement and the effect of...

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6th European and Mediterranean Conference on Information Systems, EMCIS 2009

作者： Khanmohammadi, Sohrab Abdolahi, Solmaz Electric and Computing Faculty Control Engineering Group Tabriz University Iran Computer Engineering Group Computing Faculty Azad University of Shabestar Iran

ISBN: (纸本)9781902316697

Scheduling has a lot of applications in single machine operations. We can refer to its usage in computer and internet services. Many web requests may be replied to only through one path or router. One of the issues raised, is to minimize the mean and variance of operations on jobs. In this paper, AL-Turki method is investigated for small jobs up to at most 10 static and dynamic jobs. First, different jobs with exponential distribution are produced and then all possible forms are investigated and the amount of the least function (the combination of mean & variance) is calculated for each one and finally the best response is chosen and compared with the previous method. The simulation results show that when the combined function is closer to the mean, it reaches the best response and the more the combined function is close to variance, it will have more distance from the optimal response. Moreover, we have extended the previous method and added a buffer between various stages of the jobs. The results show that adding buffer in the first stages helps us to get better response in most states of combined function. In this paper, two other important issues are taken into consideration. In the first state, according to the fact that in most timing matters, certain period of time is needed in each stage for decision making, we have added certain time units for decision making, and its effect has been investigated as well. Analysis of results indicate that increasing the decision making time would always cause the error between the amount of combined function and the optimum function to increase. In the second state, the Breakdown effect of the machine(breakdown time and breakdown duration) has been investigated. The analysis of simulation results show that these two parameters cause a deviation from the optimal results.

关键词： Decision making

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Passive sources for the Bennett-Brassard 1984 quantum-key-distribution protocol with practical signals

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Physical Review A 2010年第5期82卷 052325-052325页

作者： Marcos Curty Xiongfeng Ma Hoi-Kwong Lo Norbert Lütkenhaus ETSI Telecomunicación Department of Signal Theory and Communications University of Vigo Campus Universitario E-36310 Vigo Pontevedra Spain Institute for Quantum Computing & Department of Physics and Astronomy University of Waterloo Waterloo Ontario N2L 3G1 Canada Center for Quantum Information and Quantum Control Department of Physics and Department of Electrical & Computer Engineering University of Toronto Toronto Ontario M5S 3G4 Canada

Most experimental realizations of quantum key distribution are based on the Bennett-Brassard 1984 (the so-called BB84) protocol. In a typical optical implementation of this scheme, the sender uses an active source to produce the required BB84 signal states. While active state preparation of BB84 signals is a simple and elegant solution in principle, in practice passive state preparation might be desirable in some scenarios, for instance, in those experimental setups operating at high transmission rates. Passive schemes might also be more robust against side-channel attacks than active sources. Typical passive devices involve parametric down-conversion. In this paper, we show that both coherent light and practical single-photon sources are also suitable for passive generation of BB84 signal states. Our method does not require any externally driven element, but only linear optical components and photodetectors. In the case of coherent light, the resulting key rate is similar to the one delivered by an active source. When the sender uses practical single-photon sources, however, the distance covered by a passive transmitter might be longer than that of an active configuration.

关键词： Side channel attack

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Meta-analysis of the TAEE project applying social network analysis

Meta-analysis of the TAEE project applying social network an...

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IEEE Education engineering (EDUCON)

作者： Jorge A. López López Vargas Nelson Piedra Jeanneth Chicaiza Edmundo Tovar Manuel Blázques Manuel Castro Jesús Arriaga Fernando Pescador Jesús Romo Oskar Casquero Manuel Benito Ariana Landaluce Computer Sciences School Universidad Técnica Particular de Loja Loja Ecuador School of Computing Universidad Politécnical de Madrid Madrid España Industrial Engineering School Universidad Nacional de Educación a Distancia Madrid España Control and Electronic Systems Department Universidad Politécnica de Madrid Madrid España Universidad Del País Vasco Bilbao España

The social network analysis (SNA) is an approach that can be applied as a complement to other analysis (such as statistical) in order to obtain other valuable information. The social network analysis has been used in several initiatives showing that it is an approach that can contribute in building the semantic web. Within the project Technologies Applied to Electronics Teaching (TAEE) there are biannual conferences (it has been organized since 1996) and have accumulated a significant amount of data resulting from the conferences held. All of this information constitutes a data source that should be exploited and that can provide meaningful information. In this document we describe, how to social network analysis has been used on data sources generated by user communities, in order to obtain some semantic artifacts, like ontologies. Also describes how to was applied the social network analysis and its metrics on the information generated in the TAEE congresses to answer a set of questions (What are the relationships and the level of cohesion of the different organizations (at the level of Spain and across continents) involved in TAEE? How have evolutioned the thematics covered in the conference?, What are the new ontological additions in technology over the years?, and How have evolutioned the thematics in the research and studies related to teaching electronics?) formulated by the organizers of the congresses and that through other approaches would have been a large task and complicated. The answers to the questions can provide us important information about the behavior and characteristics of the elements present in TAEE conferences, furthermore being an element for making decisions on future initiatives with the same style of TAEE.

关键词： Social network services Education Measurement Organizations Semantics Ontologies Software

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Flexural-torsional resonance mode of a chip cantilever system: Applications to nanomachining

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Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures 2009年第2期27卷 958-963页

作者： Voigt, Felix Krohs, Florian Gerbach, Ronny Department of Computing Science Division Microrobotics and Control Engineering CvO University of Oldenburg Ulhornsweg 84 26129 Oldenburg Germany Fraunhofer IWM Halle Walter-Hülse-Strae 1 06120 Halle Germany

Cantilever vibration modes beyond the first harmonic of the standard flexural vibration mode were intensely explored in atomic force microscopy (AFM) during the past years. One example for this development is the usage of the torsional resonance mode. Further, the lateral bending mode was investigated and applied in AFM imaging and measurement. Here, the authors report on an extraordinary resonance mode of a cantilever chip system. In this mode the cantilever performs flexural as well as torsional movements. The mode was investigated in detail by scanning laser-Doppler vibrometry. It was found that there exists an intermediate stripelike region between the cantilever and the chip, which significantly contributes to the mechanical vibrations. In addition simulations using the finite-element method were performed to explore possible natural modes of the chip cantilever system. Nanomachining was performed on samples in a highly efficient manner with help of the above described resonance mode. The atomic force microscope could be specialized for material processing tasks on the micro- and nanometer scales utilizing this resonance mode. © 2009 American Vacuum Society.

关键词： Atomic force microscopy

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EW-PESQ: A quality assessment method for speech signals sampled at 48 kHz

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AES: Journal of the Audio engineering Society 2010年第4期58卷 251-268页

作者： Bispo, Bruno C. Esquef, Paulo A.A. Biscainho, Luiz W.P. De Lima, Amaro A. Freeland, Fabio P. De Jesus, Rafael A. Said, Amir Lee, Bowon Schafer, Ronald W. Kalker, Ton Department of Electrical and Computer Engineering University of Porto Porto Portugal Coordination of Systems and Control National Laboratory for Scientific Computing LNCC/MCT Petrópolis RJ Brazil LPS-PEE/COPPE Federal University of Rio de Janeiro Rio de Janeiro RJ Brazil Nova Iguaçu RJ Brazil Rio de Janeiro RJ Brazil PETROBRAS/E and P Rio de Janeiro RJ Brazil Multimedia Communications and Networking Lab Hewlett-Packard Laboratories Palo Alto CA United States

Extended models of the W-PESQ method are presented which are capable of assessing the subjective quality of noisy speech signals sampled at 48 kHz. Two methods are proposed: a version backward compatible with the W-PESQ standard, called EW-PESQ(E), and another, called EW-PESQ(R), in which the original psychoacoustic models are entirely replaced with alternative formulations available in the literature. Performance figures of both the EW-PESQ(E) and the EW-PESQ(R) in predicting the subjective quality of extrawide-band speech (sampled at 48 kHz) corrupted with broad-band and environmental noise are reported. In both cases the results obtained reveal a strong correlation (approximately 97%) with mean opinion scores.

关键词： Speech communication

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Output regulation design for a class of nonlinear systems with an unknown control direction

Output regulation design for a class of nonlinear systems wi...

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2009 7th Asian control Conference, ASCC 2009

作者： Xu, Dabo Huang, Lie Applied Control and Computing Laboratory Department of Mechanical and Automation Engineering Chinese University of Hong Kong Shatin N.T. Hong Kong

This paper presents the solution of the global robust output regulation problem for a class of nonlinear systems with relative degree one without knowing the control direction. The result is also applied to an asympto... 详细信息

ISBN: (纸本)9788995605691

关键词： Nonlinear systems

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Comparison of data driven models for the valuation of residential premises using KEEL

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International Journal of Hybrid Intelligent Systems 2010年第1期7卷 3-16页

作者： Lasota, Tadeusz Mazurkiewicz, Jacek Trawiński, Bogdan Trawiński, Krzysztof Department of Spatial Management Wrocław University of Environmental and Life Sciences ul. Norwida 25/27 50-375 Wrocław Poland European Centre for Soft Computing Edificio Científico-Tecnológico 3 Planta C. Gonzalo Gutiérrez Quirós S/N 33600 Mieres Asturias Spain Institute of Computer Engineering Control and Robotics Wrocław University of Technology Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland Institute of Informatics Wrocław University of Technology Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland

The experiments aimed to compare data driven models for the valuation of residential premises were conducted using KEEL (Knowledge Extraction based on Evolutionary Learning) system. Twelve different regression algorithms were applied to an actual data set derived from the cadastral system and the registry of real estate transactions. The 10-fold cross validation and statistical tests were applied. The lowest values of MSE provided models constructed and optimized by means of support vector machine, artificial neural network, decision trees for regression and quadratic regression, however differences between them were not statistically significant. Worse performance revealed algorithms employing evolutionary fuzzy rule learning. The experiments confirmed the usefulness of KEEL as a powerful tool with its numerous evolutionary algorithms together with classical learning approaches to carry out laborious investigation on a practical problem in a relatively short time.

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Determination of optimal mutation interval for μga leased on the performance analysis of GA and μgA 10

Determination of optimal mutation interval for μga leased o...

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2009 10th European control Conference, ECC 2009

作者： Duzanec, D. Kovacic, Z. Ziegler D.o.o. Construction and Development Department Zagreb Croatia University of Zagreb Faculty of EEandC Department of Control and Computing Engineering Zagreb Croatia

ISBN: (纸本)9783952417393

In order to provide the fastest search for optimal solution, both the structure and the parameters of genetic algorithms (GA) should be optimized. The advantage of recently introduced micro-genetic algorithms (μGA) is that they operate with smaller genetic populations than standard GA. This paper describes the method of determining an optimal (best possible) mutation interval for μGA based on the analysis of the influence of mutation on the performance of GA and μGA. The results obtained analytically and numerically for a selected vector optimization problem show the practical value of the method. © 2009 EUCA.

关键词： Genetic algorithms

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Economic control based on Four-Element Connection Numbers control (FECNC)

Economic control based on Four-Element Connection Numbers Co...

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2009 International Conference on Computational Intelligence and Security, CIS 2009

作者： Zhang, Yang He, Zhongxiong State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China School of Computing and Computer Engineering Beijing Jiaotong University Beijing China

ISBN: (纸本)9780769539317

The market economic system is a large complex system. In this paper, we define Four-Element Connection Numbers control which combines Set Pair Analysis, Extension Methods, etc, applies to economic control, which is efficient and accurate response to the state and trend of the economic system, could control the economic potential develop to the direction of our expectations. At last, we provide the method of prediction system and automatic control based on FECNC, and applies it to the system prediction of export economy. © 2009 IEEE.

关键词： Economic analysis

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