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International Journal of computer Vision: Guest Editorial

International Journal of computer Vision 2008年第1-3期77卷 1-1页

作者： Freeman, William Perona, Pietro Scholkopf, Bernhard Dept. of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA 02139 United States Dept. of Electrical Engineering and Computation and Neural Systems California Institute of Technology Pasadena CA 91125 United States Dept. of Empirical Inference Max Planck Institute for Biological Cybernetics Tübingen 72076 Germany

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Meta-modeling in multiobjective optimization

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作者： Knowles, Joshua Nakayama, Hirotaka School of Computer Science University of Manchester Oxford Road Manchester M13 9PL United Kingdom Dept. of Information Science and Systems Engineering Konan University 8-9-1 Okamoto Higashinada Kobe 658-8501 Japan

ISBN: (纸本)3540889078

In many practical engineering design and other scientific optimization problems, the objective function is not given in closed form in terms of the design variables. Given the value of the design variables, the value of the objective function is obtained by some numerical analysis, such as structural analysis, fluidmechanic analysis, thermodynamic analysis, and so on. It may even be obtained by conducting a real (physical) experiment and taking direct measurements. Usually, these evaluations are considerably more time-consuming than evaluations of closed-form functions. In order to make the number of evaluations as few as possible, we may combine iterative search with meta-modeling. The objective function is modeled during optimization by fitting a function through the evaluated points. This model is then used to help predict the value of future search points, so that high performance regions of design space can be identified more rapidly. In this chapter, a survey of meta-modeling approaches and their suitability to specific problem contexts is given. The aspects of dimensionality, noise, expensiveness of evaluations and others, are related to choice of methods. For the multiobjective version of the meta-modeling problem, further aspects must be considered, such as how to define improvement in a Pareto approximation set, and how to model each objective function. The possibility of interactive methods combining meta-modeling with decision-making is also covered. Two example applications are included. One is a multiobjective biochemistry problem, involving instrument optimization;the other relates to seismic design in the reinforcement of cable-stayed bridges. © 2008 Springer Berlin Heidelberg.

关键词： Cable stayed bridges

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On InfoStation-Based Mobile Services Support for Library Information systems

On InfoStation-Based Mobile Services Support for Library Inf...

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International Conference on Advanced Learning Technologies (ICALT)

作者： Ivan Ganchev Damien Meere Stanimir Stojanov Mícheál Ó hAodha Máirtín O'Droma Telecommunications Research Centre University of Limerick Ireland Department of Computer Systems Plovdiv University Bulgaria Dept. of Computer Systems Plovdiv University “Paisij Hilendarski” Bulgaria Faculty of Science and Engineering Librarian University of Limerick Ireland

An InfoStation-based information system design for the provision of mobile services (mServices) within a Library domain is presented. The main library mServices developed, along with sample interactions among entities, is described. The creation, management and implementation of user profiles and user service profiles receive particular attention.

关键词： Libraries Information systems Databases Management information systems Electronic learning Portable computers Educational programs Condition monitoring Quality of service Research and development

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Adopting curvilinear component analysis to improve software cost estimation accuracy model, application strategy, and an experimental verification 12

Adopting curvilinear component analysis to improve software ...

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12th International Conference on Evaluation and Assessment in software engineering, EASE 2008

作者： Sarcia, Salvatore A. Cantone, Giovanni Basili, Victor R. DISP Università di Roma Tor Vergata Via del Politecnico 1 Rome00133 Italy Dept. of Computer Science University of Maryland A.V. Williams Bldg. 115 College ParkMD20742 United States Fraunhofer Center for Experimental Software Engineering Maryland College ParkMD20742 United States

Cost estimation is a critical issue for software organizations. Good estimates can help us make more informed decisions (controlling and planning software risks), if they are reliable (correct) and valid (stable). In this study, we apply a variable reduction technique (based on auto-associative feed-forward neural networks – called Curvilinear component analysis) to log-linear regression functions calibrated with ordinary least squares. Based on a COCOMO 81 data set, we show that Curvilinear component analysis can improve the estimation model accuracy by turning the initial input variables into an equivalent and more compact representation. We show that, the models obtained by applying Curvilinear component analysis are more parsimonious, correct, and reliable. © 2008 Evaluation and Assessment in software engineering. All rights reserved.

关键词： Feedforward neural networks

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Towards an interactive assessment framework for engineering design learning

Towards an interactive assessment framework for engineering ...

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19th Int. Conf. Design Theory and Methodology and 1st Int. Conf. Micro and Nano systems, presented at - 2007 ASME International Design engineering Technical Conferences and computers and Information in engineering Conference, IDETC/CIE2007

作者： Rosé, Carolyn P. Arguello, Jaime Smailagic, Asim Gweon, Gahgene Finger, Susan Siewiorek, Daniel P. Carnegie Mellon University Language Technologies Institute Human-Computer Interaction Institute Pittsburgh PA 15213 United States Carnegie Mellon University Language Technologies Institute Pittsburgh PA 15213 United States Carnegie Mellon University Dept. of Civil and Environmental Engineering Institute for Complex Engineered Systems Pittsburgh PA 15213 United States Carnegie Mellon University Human-Computer Interaction Institute Pittsburgh PA 15213 United States Carnegie Mellon University Electrical and Computer Engineering Human-Computer Interaction Institute Pittsburgh PA 15213 United States

ISBN: (纸本)0791848043

In this paper we explore the use of text processing technology for on-line assessment in an engineering design project class. We present results from a 5-week classroom study in a capstone engineering design course in which we explore the potential benefits of such technology for student learning in this context. Furthermore, we present results from ongoing work assessing student productivity based on features extracted from their conversational behavior in the course discussion board. While we found that typical shallow productivity measures such as number of posts, length of posts, or number of files committed have no correlation with an instructor assigned grade, we can achieve a substantial improvement using simple linguistic patterns extracted from on-line conversational behavior. Copyright © 2007 by ASME.

关键词： Text processing

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Parallel, multistage model for enterprise system of systems

2008 IEEE International Conference on System of Systems Engi...

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2008 IEEE International Conference on System of systems engineering, SoSE 2008 2008年

作者： Kim, Harrison Lu, Shen Kim, Jin Suk Kim, Byoung-Do Dept. of Industrial and Enterprise Systems Engineering University of Illinois Urbana IL 61801 United States Dept. of Computer Science University of Seoul Seoul Korea Republic of Texas Advanced Computing Center University of Texas at Austin Austin TX 78758 United States

ISBN: (纸本)9781424421732

This paper describes a parallel, multistage optimization approach to enterprise system design and operations where a system design is linked with system operations (e.g., resource allocation) along the multistage decision making horizon. Our approach is composed of two parts: multistage formulation, and task-parallel algorithm. The formulation utilizes the quasi-separability of the multistage decision making structure, i.e., allowing relaxation by defining the linking variables for adjacent stages of decision making. The task-parallel algorithm enables optimal load balancing of the tasks and it is validated in the demonstration case where an airline plans to introduce multiple new aircraft to capture dynamically changing travel demand. Due to the complexity added onto the upcoming future stages in the optimization processes, a linearly increasing computational load is assumed as the number of stages increases. By utilizing this linearity, the proposed task- parallel algorithm demonstrates significant speedups and parallel performances.

关键词： Decision making

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Modelling and identification of a small unmanned aerial vehicle

Modelling and identification of a small unmanned aerial vehi...

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作者： Soumelidis, Alexandres Gaspar, Péter Bauer, Péter Balas, Gary Systems and Control Lab Computer and Automation Research Institute Hungarian Academy of Sciences Kende st 13-17 Budapest H-1111 Hungary Dept. of Control and Transport Automation Faculty of Transportation Engineering Budapest University of Technology and Economics Bertalan Lajos st 2 Budapest H-1111 Hungary Dept. of Aerospace Engineering and Mechanics Institute of Technology University of Minnesota 110 Union st SE Minneapolis MN 55455-0153 United States

ISBN: (纸本)9789633130117

The field of Unmanned Aerial Vehicles (UAV) has gained great significance in the R&D activities of several institutions, and numerous realizations have been constructed. Controlling the movement of a UAV is one of the most significant tasks in the hierarchical control system that should be realized in order to successfully manage UAVs in several missions. Precise control of the movement requires accurate mathematical models of the aircraft that correspond to the several control schemes that are intended to apply, including linearised, LPV, and nonlinear ones. The source of mathematical models includes the physical model constructed on the basis of the Newtonian equations and the rules of aerodynamics, as well as the use of empirical observations, measurements. The methodology of system identification offers the tools that can be used to manage this field. The systems and Control Laboratory of the computer and Automation Research Institute in cooperation with University of Minnesota and Budapest University of Technology and Economics has built - as a part of a more general framework established to solve complex UAV control problems - small UAVs, equipped with on-board sensors and embedded computer with the purpose of obtaining an adequate test platform for the aircraft experiments. Based on on-board measurements acquired during the flight tests performed with the UAVs, the opportunity has been given to test several system identification approaches corresponding to the control tasks to be solved. This paper gives an outline of the system identification and modelling methods that have successfully been applied, and also analyzes the problems encountered in the data-acquisition - signal processing - computing chain.

关键词： Unmanned aerial vehicles (UAV)

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The origin of efficiency droop in GaN-based light-emitting diodes and its solution

The origin of efficiency droop in GaN-based light-emitting d...

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Conference on Lasers and Electro-Optics, CLEO 2008

作者： Kim, Jong Kyu Kim, Min-Ho Schubert, Martin F. Dai, Qi Sakong, Tan Yoon, Sukho Sone, Cheolsoo Park, Yongjo Piprek, Joachim Fred Schubert, E. Electrical Computer and Systems Engineering Dept. Rensselaer Polytechnic Institute 110 Eighth St. Troy NY 12180 United States Central R and D Institute Samsung Electro-Mechanics Suwon 443-743 Korea Republic of Dept. of Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute 110 Eighth St. Troy NY 12180 United States NUSOD Institute LLC Newark DE 19714 United States

The physical origin of efficiency droop in GaN-based light-emitting diodes when driven with high current is systematically investigated. Based on our simulations and experimental results, a polarization-matched active... 详细信息

ISBN: (纸本)9781557528599

关键词： Efficiency

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Neural Net Water Level Trend Prediction and Dynamic Water Level Sampling Frequency

Neural Net Water Level Trend Prediction and Dynamic Water Le...

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ACIS International Conference on software engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing (SNPD)

作者： Steven P. Sweeney Sehwan Yoo Albert Chi Frank Lin Taikyeong Jeong Sengphil Hong Sam Fernald Dept. of Mathematics and Computer Science University of Maryland Eastern Shore USA College of Software Engineering University of Advancing Technology USA Dept. of Communications Engineering Myongji University South Korea School of Information and Media Sung-shin Woman's University South Korea Dept. of Animal and Range Science New Mexico State University USA

ISBN: (纸本)9780769532639

We have used neural network water level trend prediction (NNWLTP) in support of a water level sensing project. The NNWLTP approach allows dynamic change in water level sampling frequency, which will reduce power consumption and extend battery life in energy constrained devices. This paper deals primarily with the NNWLTP, which would allow sampling frequency change commands to be transmitted to the sensors when a transition or turning point was detected.

关键词： Artificial neural networks Turning Digital filters Sensors Time series analysis Wireless sensor networks Java

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Collaborative diversity enhancements using rate-compatible turbo codes

Collaborative diversity enhancements using rate-compatible t...

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International Symposium on Information Theory and Its Applications, ISITA

作者： Koji Ishibashi Koji Ishii Hideki Ochiai Dept. of Electrical and Electronic Engineering Shizuoka University Naka-ku Hamamatsu Shizuoka Japan Dept. of Reliability-based Information Systems Engineering Kagawa University Takamatsu Kagawa Japan Div. of Physics Electrical and Computer Engineering Yokohama National University Hodogaya-ku Yokohama Kanagawa Japan

ISBN: (纸本)9781424420681

The use of the spatial diversity is known to greatly improve the performance over the quasi-static wireless channel. In this paper, we propose a new coded cooperation protocol based on rate-compatible turbo codes. We consider the communication scenario to take place between clusters of nearby nodes with single antenna and demonstrate by a simple example that the diversity gain may be realized by using our proposed approach similar to the conventional approach based on traditional space-time codes. Moreover, our proposed approach requires only a simple modification of the metric calculation to realize the collaborative diversity.

关键词： Collaboration Turbo codes Relays Decoding Protocols Reliability engineering Electronic mail Wireless sensor networks Transmitting antennas Transmitters

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