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A Gaussian Mixture Filter for Near-Far Object Tracking

A Gaussian Mixture Filter for Near-Far Object Tracking

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international conference on Information Fusion

作者： G.W. Pulford D.J. Salmond QinetiQ Limited UK

the near-far object tracking (NFOT) problem concerns the tracking of an extended object consisting of a set of resolvable sources that, due to finite sensor resolution, appears as a single point when at long range from the sensor. A Gaussian mixture filter for this problem is presented for the case of a linear object comprising a known number of sources. the filter structure is a combination of the probabilistic data association (PDA) filter and the multiple simultaneous measurement filter. the filter takes into account the uncertainty concerning the object's structure and orientation, as well as the presence of false alarms. Simulations for an open-loop pursuit scenario are presented that compare the performance of the filter with another Gaussian mixture filter that does not consider sensor resolution

关键词： Target tracking Personal digital assistants Scattering Nonlinear filters Image processing Matched filters context modeling Filtering algorithms Pattern matching Azimuth

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modeling UI agents for public environments to enhance the V2oIP embedded ATM access point services

Modeling UI agents for public environments to enhance the V2...

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international conference on Advanced Communication Technology (ICACT)

作者： V.C. Joseph Dong-Myoung Seol Eun-Ryoung Lee Jiyoung Kwak Jang-Hee Yu Div. of Embedded Syst. Res. ETRI Embedded Systems Research Division Electronics and Telecommunications Research Institute South Korea Embedded Systems Research Division ETRI

Usage of automated teller machines (ATMs) is confined to financial transactions in the present world scenario. Multimedia usage for finance is inhibited by several factors including security and lack of flexible user interface models to proliferate the public environment usage criterion. Financial services become more attractive when the user obtains a plurality of services over existing access methodology using personalized web pages, animated and other customized mobile agents to mimic the usage patterns. We present an intelligent and novel approach to facilitate and propel financial and non-financial services for public environments that seamlessly integrate wireless multimedia applications and digital content over the financial services network. Our design is based on the embedded ATM access point that uses secure software architecture with V2oIP stack to facilitate the usage and creation of a multitude of new services. Dynamic and adaptive context-sensitive GUI with animated icons forms the trend for the next generation of compact ubiquitous devices that proliferate the home network and public environment

关键词： Multimedia systems Animation Finance User interfaces Web pages Mobile agents Intelligent networks Propulsion Communication system security Application software

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Query expansion using term relationships in language models for information retrieval

Query expansion using term relationships in language models ...

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CIKM'05 - Proceedings of the 14th ACM international conference on Information and Knowledge Management

作者： Bai, Jing Song, Dawei Bruza, Peter Nie, Jian-Yun Cao, Guihong DIRO University of Montreal suce. Centre-ville Montreal Que. H3C 3J7 Canada Knowledge Media Institute Open University Walton Hall Milton Keynes MK7 6AA United Kingdom Distributed Systems Technology Centre University of Queensland QLD 4072 Australia

ISBN: (纸本)1595931406

modeling (LM) has been successfully applied to Information Retrieval (IR). However, most of the existing LM approaches only rely on term occurrences in documents, queries and document collections. In traditional unigram based models, terms (or words) are usually considered to be independent. In some recent studies, dependence models have been proposed to incorporate term relationships into LM, so that links can be created between words in the same sentence, and term relationships (e.g. synonymy) can be used to expand the document model. In this study, we further extend this family of dependence models in the following two ways: (1) Term relationships are used to expand query model instead of document model, so that query expansion process can be naturally implemented;(2) We exploit more sophisticated inferential relationships extracted with Information Flow (IF). Information flow relationships are not simply pairwise term relationships as those used in previous studies, but are between a set of terms and another term. they allow for context-dependent query expansion. Our experiments conducted on TREC collections show that we can obtain large and significant improvements with our approach. this study shows that LM is an appropriate framework to implement effective query expansion. Copyright 2005 ACM.

关键词： Query languages

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7th international conference on Fundamental Approaches to Software Engineering, FASE 2004 Held as Part of the Joint European conferences on theory and Practice of Software, ETAPS 2004

7th International Conference on Fundamental Approaches to So...

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7th international conference on Fundamental Approaches to Software Engineering, FASE 2004 Held as Part of the Joint European conferences on theory and Practice of Software, ETAPS 2004

ISBN: (纸本)3540213058

the proceedings contain 28 papers. the special focus in this conference is on Fundamental Approaches to Software Engineering. the topics include: Distributed information management with XML and web services;a formal treatment of context-awareness;consistent adaptation and evolution of class diagrams during refinement;measuring aspect cohesion;refactoring object-z specifications;checking absence of illicit applet interactions;a tool-assisted framework for certified bytecode verification;reasoning about card tears and transactions in java card;predictable dynamic plugin systems;a correlation framework for the corba component model;an integrated development environment for analysis, synthesis, and verification of component-based systems;actor-centric modeling of user rights;modeling role-based access control using parameterized UML models;compositional nested long running transactions;a tool for automatic translation from DAML-S to high-level petri nets;integrating meta-modelling aspects with graph transformation for efficient visual language definition and model manipulation;an operational semantics for stateflow;improving use case based requirements using formally grounded specifications;an integrated development environment for process control requirements and design;automated debugging using path-based weakest preconditions;filtering TOBIAS combinatorial test suites;systematic testing of software architectures in the C2 style;optimising communication structure for model checking;translating software designs for model checking;enhancing remote method invocation through type-based static analysis and specification and analysis of real-time systems using real-time maude.

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ENHANCED TIME-STRETCHING using ORDER-2 SINUSOIDAL modeling 7

ENHANCED TIME-STRETCHING USING ORDER-2 SINUSOIDAL MODELING

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7th international conference on Digital Audio Effects, DAFx 2004

作者： Marchand, Sylvain Raspaud, Martin SCRIME LaBRI Université Bordeaux 1 351 cours de la Libération Talence cedexF-33405 France

In this article, we introduce a 2-level sinusoidal model and demonstrate its aptitude for a challenging digital audio effect: time-stretching without audible artifacts. More precisely, sinusoidal modeling is used at the two levels of the new sound model. We consider the frequency and amplitude parameters of the partials of the classic sinusoidal model as (control) signals, that we propose to model again using a sinusoidal model. this way, higher-level musical structures such as the vibrato and tremolo in the original sound are captured in the "partials of partials" of this order-2 sinusoidal model. We propose then a new time-stretching method, based on this new hierarchical model, which preserves not only the pitch of the original sound, but also its natural vibrato and tremolo. © 2004 Proceedings of the international conference on Digital Audio Effects, DAFx. All rights reserved.

关键词： Music

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MARGE project:: Design, modeling, and control of assistive devices for minimally invasive surgery

MARGE project:: Design, modeling, and control of assistive d...

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7th international conference on Medical Image Computing and Computer-Assisted Intervention (MICCAI 2004)

作者： Dombre, E Michelin, M Pierrot, F Poignet, P Bidaud, P Morel, G Ortmaier, T Sallé, D Zemiti, N Gravez, P Karouia, M Bonnet, N LIRMM F-34392 Montpellier 5 France LRP F-92265 Fontenay Aux Roses France CEA SRSI F-92265 Fontenay Aux Roses France Grp Hosp Pitie Salpetriere F-75651 Paris 13 France

ISBN: (纸本)3540229779

MARGE is a joint project in the framework of the interdisciplinary national program in Robotics, called ROBEA, launched by the French National Research Center (CNRS) in 2001. the focus is on the development of design methodologies and on the control of high mobility and dexterity assistive devices for complex gesture assistance in minimally invasive surgery, especially for coronary artery bypass grafting. this paper presents the main results of this two-year project.

关键词： Design

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Towards lower error rates in phoneme recognition

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7th international conference on Text, Speech and Dialogue, TSD 2004

作者： Schwarz, Petr Matějka, Pavel Černocký, Jan Brno University of Technology Czech Republic

ISBN: (纸本)3540230491

We investigate techniques for acoustic modeling in automatic recognition of context-independent phoneme strings from the TIMIT database. the baseline phoneme recognizer is based on TempoRAl Patterns (TRAP). this recognizer is simplified to shorten processing times and reduce computational requirements. More states per phoneme and bi-gram language models are incorporated into the system and evaluated. the question of insufficient amount of training data is discussed and the system is improved. All modifications lead to a faster system with about 23. 6% relative improvement over the baseline in phoneme error rate. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Acoustic modeling

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7th international conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2004

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7th international conference on Medical Imaging and Computer Assisted Intervention, MICCAI 2004

ISBN: (纸本)3540229760

the proceedings contain 111 papers. the special focus in this conference is on Brain Segmentation, Cardiovascular Segmentation, Segmentation Methods and Registration. the topics include: Level set methods in an EM framework for shape classification and estimation;segmentation of 3D probability density fields for 4D ultrasound data;learning coupled prior shape and appearance models for segmentation;a modified total variation denoising method in the context of 3d ultrasound images;correcting nonuniformities in MRI intensities using entropy minimization based on an elastic model;texture image analysis for osteoporosis detection with morphological tools;dual front evolution model and its application in medical imaging;topology smoothing for segmentation and surface reconstruction;simultaneous boundary and partial volume estimation in medical images;medical image segmentation based on mutual information maximization;adaptive segmentation of multi-modal 3d data using robust level set techniques;coupling statistical segmentation and PCA shape modeling;image segmentation adapted for clinical settings by combining pattern classification and level sets;profile scale-spaces for multiscale image match;classification improvement by segmentation refinement;landmark-driven, atlas based segmentation of mouse brain tissue images containing gene expression data;on normalized convolution to measure curvature features for automatic polyp detection and robust generalized total least squares iterative closest point registration;quantification of delayed enhancement MR images and automatic optimization of segmentation algorithms through simultaneous truth and performance level estimation.

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A Bayesian approach to biomechanical modeling to optimize over large parameter spaces while considering anatomical variability

A Bayesian approach to biomechanical modeling to optimize ov...

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26th Annual international conference of the IEEE-Engineering-in-Medicine-and-Biology-Society

作者： Santos, VJ Valero-Cuevas, FJ Cornell Univ Neuromuscular Biomech Lab Ithaca NY 14853 USA

ISBN: (纸本)0780384393

We present the Markov Chain Monte Carlo (MCMC) approach in the context of a musculoskeletal model of the thumb. With special consideration for the complexities of biomechanical modeling, we present this approach as an alternative to standard parameter estimation techniques that produce a single, in some way optimal, set of parameter values. In contrast, MCMC methods are derived from a Bayesian philosophy, in which each "true" model parameter is actually a random variable with its own probability distribution. With MCMC we can (1) address challenges of model parameter estimation that are difficult for gradient-based methods to meet, (2) estimate the inherent biomechanical capabilities of a specific "model topology" for large, variable parameter spaces (e.g. 50-dimensional for the assumed thumb model), and (3) determine the functional consequences of the unavoidable anatomical variability across subjects in a population. using the MCMC approach with a Metropolis-Hastings sampling algorithm we explored a 50-D musculoskeletal parameter space and successfully achieved convergence. We found the relatively small subspace of the expansive 50-D space that, for a hinged serial linkage model of the thumb, predicts functional outcomes that best-fit the experimental data.

关键词： biomechanical modeling hand Markov chain Monte Carlo Metropolis-Hastings sampling parameter estimation stochastic simulation thumb

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Moving toward intent detection: A tool-based approach

Moving toward intent detection: A tool-based approach

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Proceedings - 7th international IEEE conference on Intelligent Transportation Systems, ITSC 2004

作者： Burgoon, Judee K. Adkins, Mark Kruse, John Jensen, Matthew L. Deokar, Amit Twitchell, Douglas P. Lu, Shan Metaxas, Dimitris N. Nunamaker Jr., Jay F. Younger, Robert E. Ctr. for the Mgmt. of Information University of Arizona Tucson AZ 85721 United States Compl. Biomed. Imaging/Modeling Ctr. Rutgers University New Brunswick NJ 08854 United States Space and Nav. Warfare Syst. Center San Diego CA 92152 United States

Past research in deception detection at the University of Arizona has guided the investigation of intent detection. A theoretical foundation and model for the analysis of intent detection is proposed. Available test beds for intent analysis are discussed and two proof-of-concept studies exploring nonverbal communication within the context of intent detection are shared.

关键词： Error detection

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