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检索条件"任意字段=Applied Computing 2004 - Proceedings of the 2004 ACM Symposium on Applied Computing"

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HMM model selection issues for soccer video

引用

3rd International Conference on Image and Video Retrieval, CIVR 2004

作者： Baillie, Mark Jose, Joemon M. van Rijsbergen, Cornelis J. Department of Computing Science University of Glasgow 17 Lilybank Gardens GlasgowG12 8QQ United Kingdom

ISBN: (纸本)3540225390

There has been a concerted effort from the Video Retrieval community to develop tools that automate the annotation process of Sports video. In this paper, we provide an in-depth investigation into three Hidden Markov Model (HMM) selection approaches. Where HMM, a popular indexing framework, is often applied in a ad hoc manner. We investigate what effect, if any, poor HMM selection can have on future indexing performance when classifying specific audio content. Audio is a rich source of information that can provide an effective alternative to high dimensional visual or motion based features. As a case study, we also illustrate how a superior HMM framework optimised using a Bayesian HMM selection strategy, can both segment and then classify Soccer video, yielding promising results. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Hidden Markov models

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Semi-supervised semantic role labeling

Semi-supervised semantic role labeling

引用

2004 AAAI Spring symposium

作者： Thompson, Cynthia A. School of Computing University of Utah Salt Lake City UT 84112

Most corpus-based approaches to language learning have focused on tasks for which a sufficient amount of human-labeled training data is available. However, it is difficult to produce such data, and models trained from such data tend to be brittle when applied to domains that vary, even in seemingly minor ways, from the training data. We claim that these difficulties can by overcome by applying semi-supervised learning techniques. Semi-supervised techniques learn from both labeled and "raw" data. In our case, the latter is raw text. Several researchers have used semi-supervised techniques for language learning (Nigam et al. 2000;Blum & Mitchell 1998;Joachims 1999;Riloff & Jones 1999), but we believe that this area is not yet well explored and definitely not well understood. Therefore, we present a challenge problem for semi-supervised learning: semantic role labeling and semantic relationship annotation. Semantic role labeling was introduced by Gildea & Jurafsky (2002), and we added semantic relationship annotation in Thompson, Levy, & Manning (2003). This problem is a difficult one for semisupervised techniques, for three reasons. First, there are many possible classes (the role labels) for examples. Second, sequence learning is involved. Third, the learning scenario is plagued by sparse data problems. We describe the role labeling problem, our learning model and its extendibility to semi-supervised learning, and some preliminary experiments. Copyright © 2004, American Association for Artificial Intelligence (***). All rights reserved.

关键词： Semantics

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applied computational fluid dynamics in support of aircraft/store compatibility and weapons integration - 2004 edition

Applied computational fluid dynamics in support of aircraft/...

引用

DoD HPCMP Users Group Conference, UGC 2004

作者： Freeman, Jacob A. Jolly, Bruce A. Eglin AFB FL United States

ISBN: (纸本)0769522599

The Air Force SEEK EAGLE Office (AFSEO), Eglin Air Force Base (AFB), FL, is the United States Air Force (USAF) authority for weapons certification efforts. AFSEO performs test and evaluation for aircraft/store compatibility certification and uses Computational Fluid Dynamics (CFD) to support this process. Determining the flow about an aircraft/store combination can be extremely difficult. Complicated geometry such as pylons, launchers, and internal weapons bays can create severe acoustic and aerothermodynamic environments, which are challenging to numerically simulate. The additional challenge of rapidly and accurately simulating the trajectory of a store separation in a high-volume simulation environment is beyond the capabilities of most CFD programs. The USAF requirement for numerous, simultaneous and quick-reaction solutions for a wide variety of stores and aircraft can only be accomplished through application of parallel high-performance computing resources that meet the significant computational and memory demands of the various cases. This project increases combat capability for the current USAF fleet of tactical and strategic aircraft with associated weapon systems. Before operational use, all aircraft/ store configurations must be certified for safe loading, carriage and jettison/release. AFSEO provides flight certification recommendations, which are based on combinations of engineering analysis, ground, and flight testing. Engineering analyses come from disciplines in carriage loads, store separations, flutter, ballistics, stability and control, and electromagnetic compatibility and interference. The AFSEO CFD team provides time-critical support for engineering analyses-in the form of computed aircraft/store carriage aerodynamic loads, predicted store separation characteristics, and visualized flow field physics-used to optimize the application of ground and flight testing, reducing risk and lowering cost of fielding new weapons. This paper discusses four

关键词： Aircraft

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Adaptive and iterative soft-decision list decoding

Adaptive and iterative soft-decision list decoding

引用

IEEE International symposium on Information Theory

作者： F. Cai M.A. Armand M. Motani Electrical & Computer Engineering National University of Singapore Singapore

An efficient adaptive list decoder for Reed-Solomon (RS) codes by adaptively adjusting the list size is presented. Simulations show that it performs better than the Koetter-Vardy decoder (KVD) for small list sizes, with only a marginal increase in complexity. For larger list sizes, we propose an iterative decoder which, when applied to a parallel concatenated RS code, performs significantly better than the KVD, applied to an RS code of the same rate.

关键词： Iterative decoding Concatenated codes Reed-Solomon codes Bit error rate Computational modeling High performance computing Iterative algorithms Polynomials Upper bound Turbo codes

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Meshless Isosurface Generation from Multiblock Data

Meshless Isosurface Generation from Multiblock Data

引用

6th Joint Eurographics - IEEE TCVG symposium on Visualization, VisSym 2004

作者： Co, Christopher S. Porumbescu, Serban D. Joy, Kenneth I. Center for Image Processing and Integrated Computing Department of Computer Science University of California Davis United States

ISBN: (纸本)390567307X

We propose a meshless method for the extraction of high-quality continuous isosurfaces from volumetric data represented by multiple grids, also called "multiblock"data sets. Multiblock data sets are commonplace in computational mechanics applications. Relatively little research has been performed on contouring multiblock data sets, particularly when the grids overlap one another. Our algorithm proceeds in two steps. In the first step, we determine a continuous interpolant using a set of locally defined radial basis functions (RBFs) in conjunction with a partition of unity method to blend smoothly between these functions. In the second step, we extract isosurface geometry by sampling points on Marching Cubes triangles and projecting these point samples onto the isosurface defined by our interpolant. A surface splatting algorithm is employed for visualizing the resulting point set representing the isosurface. Because of our method's generality, it inherently solves the "crack problem"in isosurface generation. Results using a set of synthetic data sets and a discussion of practical considerations are presented. The importance of our method is that it can be applied to arbitrary grid data regardless of mesh layout or orientation. © The Eurographics Association 2004.

关键词： Computational mechanics

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Configurable event communication in Cadena

Configurable event communication in Cadena

引用

IEEE symposium on Real-Time and Embedded Technology and Applications

作者： G. Singh P.S. Kumar Q. Zeng Computing and Information Sciences Kansas State University Manhattan KS USA

To satisfy the stringent QoS requirements of distributed real-time embedded (DRE) systems, middleware services customized to the specific needs of the application may be needed. This problem is often attacked by reimplementing all or large portions of an existing middleware service, which can be a time-consuming and an error prone task. In this paper, we propose a model-driven approach for middleware customization. To enable this approach, we propose event communication framework (ECF), a customizable middleware framework which provides a number of different options for implementing various features of event communication. To determine when to exercise each option, we have performed experiments to identify the application contexts in which each ECF mechanism performs better than the others. Heuristics from these experiments have been incorporated into algorithms which analyze high-level specifications of application scenarios to identify where ECF customizations can be applied. We provide configuration tools that generate customized push paths for event notifications using a combination of code synthesis, weaving and transformation techniques. We have applied our approach to the application scenarios in the Boeing BoldStroke system.

关键词： Middleware Algorithm design and analysis Real time systems Weaving Large-scale systems XML Containers Distributed computing Embedded computing Context

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CARUSO - an approach towards a network of low power autonomic systems on chips for embedded real-time applications

CARUSO - an approach towards a network of low power autonomi...

引用

International symposium on Parallel and Distributed Processing (IPDPS)

作者： U. Brinkschulte J. Becker T. Ungerer Department of Computer Science University of Karlsruhe Germany Department of Electrical Engineering University of Karlsruhe Germany Department of Applied Computer Science University of Augsburg

Summary form only given. We propose CARUSO - a new SoC approach that emphasizes connectivity, autonomic computing principles, real-time, and ultra-low power requirements. The requirements shall be fulfilled by a multithreaded processor core within a reconfigurable SoC. A helper thread running with low priority in an own thread slot concurrent to the application implements an autonomic manager that monitors the application. A middleware decides if self-optimization, self-configuration, self-protection, or self-healing techniques must be triggered based on the autonomic manager's information and further application knowledge.

关键词： Real time systems Middleware Hardware Energy consumption Yarn Application software Distributed computing System-on-a-chip Computer science Embedded computing

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A comparative study on three ontology mapping methods in the integration of product knowledge

A comparative study on three ontology mapping methods in the...

引用

WCICA 2004 - Fifth World Congress on Intelligent Control and Automation, Conference proceedings

作者： Yuan, Yang Li, Shanping Guo, Ming He, Sailong College of Computer Science Zhejiang University Hangzhou Zhejiang Province China School of Computing Zhejiang University City College Hangzhou Zhejiang Province China Department of Computer Science Ningbo University Ningbo Zhejiang Province China

ISBN: (纸本)0780382730

With the growing access to heterogeneous and independent product data repositories, the treatment of differences in the structure and semantics of the data plays a major role in product knowledge systems. Recent research has used ontology as the knowledge base that describes concepts. For the great variation both in the level of detail and logic of different ontology representations, an integration process is needed. Comparing conception is a basic operation in the process. This paper has introduced three individual mapping methods on conception compare - Affix, Edit Distance and Synonym (WordNet). To evaluate their actual effects, a product ontology mapping task has applied these methods. Comparative study on the experiment results shows that each method has some disadvantages and can not complete the mapping task Independently. To achieve better effect, it is necessary to improve the performance of the individual methods and combine their mapping results.

关键词： Intelligent control

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Quantum computing 04

Quantum computing

引用

proceedings of the fifteenth annual acm-SIAM symposium on Discrete algorithms

作者： Raymond Laflamme University of Waterloo Canada & Perimeter Institute for Theoretical Physics Waterloo Canada

No abstract available.

ISBN: (纸本)9780898715583

No abstract available.

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Face recognition using Ada-Boosted Gabor features

Face recognition using Ada-Boosted Gabor features

引用

proceedings - Sixth IEEE International Conference on Automatic Face and Gesture Recognition FGR 2004

作者： Yang, Peng Shan, Shiguang Gao, Wen Li, Stan Z. Zhang, Dong Institute of Computing Technology Chinese Academy Science Microsoft Research Asia

ISBN: (纸本)0769521223

Face representation based on Gabor features has attracted much attention and achieved great success in face recognition area for the advantages of the Gabor features. However, Gabor features currently adopted by most systems are redundant and too high dimensional. In this paper, we propose a face recognition method using AdaBoosted Gabor features, which are not only low dimensional but also discriminant. The main contribution of the paper lies in two points: (1) AdaBoost is successfully applied to face recognition by introducing the intra-face and extra-face difference space in the Gabor feature space;(2) An appropriate re-sampling scheme is adopted to deal with the imbalance between the amount of the positive samples and that of the negative samples. By using the proposed method, only hundreds of Gabor features are selected. Experiments on FERET database have shown that these hundreds of Gabor features are enough to achieve good performance comparable to that of methods using the complete set of Gabor features.

关键词： Face recognition

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