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2006 IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology

作者： De Paula, Ana Carolina M. Pilatti Ávila, Bráulio C. Scalabrin, Edson Enembreck, Fabrício Pontifical Catholic University of Paraná - PUCPR Graduate Program in Applied Computer Science - PPGIA Rua Imaculada Conceicao 1155 CEP 80.215-901 Curitiba PR Brazil

ISBN: (纸本)0769527493

This paper presents a Distributed Data Mining technique based on a multiagent environment, called SMAMDD (MultiAgent System for Distributed Data Mining), which uses model integration. Model Integration consists in the amalgamation of local models into a global, consistent one. In each subset, agents perform mining tasks locally and, afterwards, results are merged into a global model. In order to achieve that, agents cooperate by exchanging messages, aiming to improve the process of knowledge discover generating accurate results. The multiagent system for Distributed Data Mining proposed in this paper has been compared with classical machine learning algorithms which are based on model integration as well, simulating a distributed environment. The results obtained show that SMAMDD can produce highly accurate data models. © 2006 IEEE.

关键词： Multi agent systems

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Instantaneous radar polarimetry with multiple dually-polarized antennas

Instantaneous radar polarimetry with multiple dually-polariz...

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40th Asilomar Conference on Signals, Systems, and computers, ACSSC '06

作者： Calderbank, A.R. Howard, S.D. Moran, W. Pezeshki, A. Zoltowski, M. Program in Applied and Computational Mathematics Princeton University Princeton NJ United States Defence Science and Technology Organization Edinburgh Australia Electrical Engineering and Computer Science University of Melbourne Melbourne Australia Electrical and Computer Engineering Purdue University West Lafayette IN United States

ISBN: (纸本)1424407850

Fully Polarimetric radar systems are capable of simultaneously transmitting and receiving in two orthogonal polarizations. Instantaneous radar polarimetry exploits both polarization modes of a dually-polarized radar transmitter and receiver on a pulse by pulse basis, and can improve the radar detection performance and suppress range sidelobes. In this paper, we extend the use of instantaneous radar polarimetry for radar systems with multiple dually-polarized transmit and receive antennas. Alamouti signal processing is used to coordinate transmission of Golay pairs of phase codes waveforms across polarizations and multiple antennas. The integration of multi-antenna signal processing with instantaneous radar polarimetry can further improve the detection performance, at a computational cost comparable to single channel matched filtering.

关键词： Polarimeters

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Learning representation and control in continuous Markov decision processes

Learning representation and control in continuous Markov dec...

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21st National Conference on Artificial Intelligence and the 18th Innovative Applications of Artificial Intelligence Conference, AAAI-06/IAAI-06

作者： Mahadevan, Sridhar Maggioni, Mauro Ferguson, Kimberly Osentoski, Sarah Department of Computer Science University of Massachusetts 140 Governor's Drive Amherst MA 01003 Program in Applied Mathematics Department of Mathematics Yale University New Haven CT 06510

ISBN: (纸本)1577352815

This paper presents a novel framework for simultaneously learning representation and control in continuous Markov decision processes. Our approach builds on the framework of proto-value functions, in which the underlying representation or basis functions are automatically derived from a spectral analysis of the state space manifold. The proto-value functions correspond to the eigenfunctions of the graph Laplacian. We describe an approach to extend the eigenfunctions to novel states using the Nyström extension. A least-squares policy iteration method is used to learn the control policy, where the underlying subspace for approximating the value function is spanned by the learned proto-value functions. A detailed set of experiments is presented using classic benchmark tasks, including the inverted pendulum and the mountain car, showing the sensitivity in performance to various parameters, and including comparisons with a parametric radial basis function method. Copyright © 2006, American Association for Artificial Intelligence (***). All rights reserved.

关键词： Knowledge representation

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Multiagent-Based Model Integration

Multiagent-Based Model Integration

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Web Intelligence and Intelligent Agent Technology Workshops (WI-IAT)

作者： Ana Carolina M. Pilatti De Paula Braulio C. Avila Edson Scalabrin Fabricio Enembreck Graduate Program in Applied Computer Science-PPGIA Pontifical Catholic University of Paraná Curitiba Parana Brazil

This paper presents a distributed data mining technique based on a multiagent environment, called SMAMDD (multiagent system for distributed data mining), which uses model integration. Model integration consists in the amalgamation of local models into a global, consistent one. In each subset, agents perform mining tasks locally and, afterwards, results are merged into a global model. In order to achieve that, agents cooperate by exchanging messages, aiming to improve the process of knowledge discover generating accurate results. The multiagent system for distributed data mining proposed in this paper has been compared with classical machine learning algorithms which are based on model integration as well, simulating a distributed environment. The results obtained show that SMAMDD can produce highly accurate data models

关键词： Distributed decision making Data mining Multiagent systems Machine learning algorithms Internet Distributed databases Intelligent agent computer science Computational modeling Data models

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Guest editorial nonlinear optimization of communication systems

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IEEE Journal on Selected Areas in Communications 2006年第8期24卷 1421-1423页

作者： Chiang, Mung Low, Steven H. Luo, Zhi-Quan Shroff, Ness B. Yu, Wei Steenstrup, M. Princeton University Department of Electrical Engineering Program in Applied and Computational Mathematics Princeton NJ 08544 United States California Institute of Technology Department of Computer Science Pasadena CA 91125 United States University of Minnesota Department of Electrical and Computer Engineering Minneapolis MN 55455 United States Purdue University School of Electrical and Computer Engineering West Lafayette IN 47907 United States University of Toronto Edward S. Rogers Sr. Department of Electrical and Computer Engineering Toronto Ont. M4S 3G5 Canada

No abstract available

关键词： Communication systems Design optimization Communication system control Optimization methods Protocols Distributed algorithms Power system modeling Nonlinear control systems Lagrangian functions Surges

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Instantaneous Radar Polarimetry with Multiple Dually-polarized Antennas

Instantaneous Radar Polarimetry with Multiple Dually-polariz...

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Asilomar Conference on Signals, Systems & computers

作者： A. R. Calderbank S. D. Howard W. Moran A. Pezeshki M. Zoltowski Program Applied and Computational Mathematics Princeton University Princeton NJ USA Defence Science and Technology Organization Edinburgh Australia Electrical Engineering and Computer Science University of Melbourne Melbourne Australia Electrical and Computer Engineering Purdue University West Lafayette IN USA

Fully polarimetric radar systems are capable of simultaneously transmitting and receiving in two orthogonal polarizations. Instantaneous radar polarimetry exploits both polarization modes of a dually-polarized radar transmitter and receiver on a pulse by pulse basis, and can improve the radar detection performance and suppress range sidelobes . In this paper, we extend the use of instantaneous radar polarimetry for radar systems with multiple dually-polarized transmit and receive antennas. Alamouti signal processing is used to coordinate transmission of Golay pairs of phase codes waveforms across polarizations and multiple antennas. The integration of multi- antenna signal processing with instantaneous radar polarimetry can further improve the detection performance, at a computational cost comparable to single channel matched filtering.

关键词： Radar polarimetry Radar antennas Polarization Radar detection Radar signal processing Transmitters Receiving antennas Transmitting antennas Computational efficiency Matched filters

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Noninvasive, quantitative fluorescence sensing in 3D tissues: An approach to in vivo molecular characterization of engineered tissue constructs

Noninvasive, quantitative fluorescence sensing in 3D tissues...

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Biomedical Topical Meeting, BIO 2006

作者： Chandra, Malavika Vishwanath, Karthik Fichter, Greg D. Liao, Elly Francis, Michael R. Hollister, Scott Mycek, Mary-Ann Applied Physics Program University of Michigan Ann Arbor MI 48109-2099 United States Departments of Biomedical Engineering University of Michigan Ann Arbor MI 48109-2099 United States Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48109-2099 United States University of Michigan Ann Arbor MI 48109-2099 United States Mechanical Engineering University of Michigan Ann Arbor MI 48109-2099 United States

A method for noninvasive, quantitative characterization of tissues using molecular fluorescence was applied to porcine knee cartilage. Experimental and computational results agreed to within 5% and were reproducible w... 详细信息

ISBN: (纸本)1557528071

关键词： Tissue

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Value function approximation with diffusion wavelets and Laplacian eigenfunctions

Value function approximation with diffusion wavelets and Lap...

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2005 Annual Conference on Neural Information Processing Systems, NIPS 2005

作者： Mahadevan, Sridhar Maggioni, Mauro Department of Computer Science University of Massachusetts Amherst MA 01003 United States Program in Applied Mathematics Department of Mathematics Yale University New Haven CT 06511 United States

ISBN: (纸本)9780262232531

We investigate the problem of automatically constructing efficient representations or basis functions for approximating value functions based on analyzing the structure and topology of the state space. In particular, two novel approaches to value function approximation are explored based on automatically constructing basis functions on state spaces that can be represented as graphs or manifolds: one approach uses the eigenfunctions of the Laplacian, in effect performing a global Fourier analysis on the graph;the second approach is based on diffusion wavelets, which generalize classical wavelets to graphs using multiscale dilations induced by powers of a diffusion operator or random walk on the graph. Together, these approaches form the foundation of a new generation of methods for solving large Markov decision processes, in which the underlying representation and policies are simultaneously learned.

关键词： Diffusion

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Extending the UMIOP specification for reliable multicast in CORBA

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OTM Confederated International Conferences, CoopIS, DOA, and ODBASE 2005 - On the Move to Meaningful Internet Systems 2005: CoopIS, DOA, and ODBASE

作者： Bessani, Alysson Neves Da Silva Fraga, Joni Lung, Lau Cheuk DAS - Departamento de Automação e Sistemas UFSC - Universidade Federal de Santa Catarina Florianopolis - Santa Catarina Brazil Graduate Program in Applied Computer Science Pontifical Catholic University of Paraná Curitiba - Paraná Brazil

ISBN: (纸本)3540297367

OMG has published an unreliable multicast specification for distributed applications developed in CORBA (UMIOP). This mechanism can be implemented based on IP Multicast, a best-effort protocol, which provides no guarantees about the message delivery. However, many fault-tolerant or groupware applications demand more restrictive agreement and ordering guarantees (for instance, reliable multicast with FIFO, causal or total ordering) from the available support for group communication. OMG has not yet provided any specification for supporting those requirements. This paper presents an important contribution towards this direction. We proposed the ReMIOP, an extension to the UMIOP/OMG protocol, for the conception of a reliable multicast mechanism in CORBA middleware. Performance measures comparing ReMIOP, UMIOP and UDP sockets for IP multicast communication are presented in order to evidence the costs for adding reliable and unreliable multicast in middleware level. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Multicasting

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Integrating the ROMIOP and ETF specifications for atomic multicast in CORBA

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OTM Confederated International Conferences, CoopIS, DOA, and ODBASE 2005 - On the Move to Meaningful Internet Systems 2005: CoopIS, DOA, and ODBASE

作者： Borusch, Daniel Lung, Lau Cheuk Bessani, Alysson Neves Da Silva Fraga, Joni Graduate Program in Applied Computer Science Pontifical Catholic University of Paraná Curitiba - PR Brazil DAS - Departamento de Automação e Sistemas UFSC - Universidade Federal de Santa Catarina Florianópolis - SC Brazil

ISBN: (纸本)3540297367

OMG published a draft specification for a reliable ordered multicast inter-ORB protocol to be used by distributed applications developed in CORBA (ROMIOP). This specification was made to attend the demand of applications that needed more restrictive guarantees on reliability and ordering, since there already has a specification without these resources (UMIOP). This paper presents how ROMIOP was implemented, as well as modifications that were made on the specification to make possible to implement it according to the ETF (Extensible Transport Framework) specification. Performance measures were made comparing ROMIOP with others protocols, like UMIOP, to show its characteristics and its cost. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Multicasting

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