检索结果-内蒙古大学图书馆

International Symposium on Multimedia Software engineering

作者： M.-L. Shyu S.-C. Chen M. Chen C. Zhang Chi-Min Shu Department of Electrical & Computer Engineering University of Miami Coral Gables FL USA Distributed Multimedia Information System Laboratory School of Computer Science Florida International University Miami FL USA Department of Environmental and Safety Engineering National Yunlin University of Science and Technology Yunlin Taiwan

We present a mechanism called the Markov model mediator (MMM) to facilitate the effective retrieval for content-based image retrieval (CBIR). Different from the common methods in content-based image retrieval, our stochastic mechanism not only takes into consideration the low-level image content features, but also learns high-level concepts from a set of training data, such as access frequencies and access patterns of the images. The advantage of our proposed mechanism is that it exploits the structured description of visual contents as well as the relative affinity measurements among the images. Consequently, it provides the capability to bridge the gap between the low-level features and high-level concepts. Our experimental results demonstrate that the MMM mechanism can effectively assist in retrieving more accurate results for user queries.

关键词： Stochastic processes Image databases Image retrieval Information retrieval Content based retrieval Feedback Digital images Spatial databases Distributed computing Multimedia systems

来源：评论

学校读者我要写书评

暂无评论

Machine learning approaches to multisource geospatial data classification: application to CRP mapping in Texas County, Oklahoma

Machine learning approaches to multisource geospatial data c...

引用

IEEE Workshop on Advances in Techniques for Analysis of Remotely Sensed Data

作者： X. Song F. Guoliang M.N. Rao School of Electrical and Computer Engineering Oklahoma State University Stillwater OK USA School of Electrical and Computer Engineering Oklahoma State University Stillwater Oklahoma Oklahoma State University System Stillwater OK US Oklahoma State Univ. Stillwater OK USA Department of Geography Oklahoma State University Stillwater OK USA Department of Geography Oklahoma State University Stillwater Oklahoma

We develop an Automated Feature Information Retrieval system (AFIRS) for accurate classification of multisource geospatial data, which involves multispectral Landsat imagery, ancillary geographic information system (GIS) data and other derived features. Two machine learning approaches, i.e., decision tree classifier (DTC) and support vector machine (SVM), are implemented as multisource geospatial data classifiers in the AFIRS. Specifically, we apply the AFIRS to the mapping of United States Department of Agriculture (USDA)'s Conservation Reserve Program (CRP) tracts in Texas County, Oklahoma. CRP is a nationwide program, and recently USDA announced payments of nearly $1.6 billion for new CRP enrollments. It is imperative to obtain accurate CRP maps for effective and efficient management and evaluation of the CRP program. However, most existing CRP maps are inaccurate and little work has been done to improve their accuracy. The proposed AFIRS is capable of handling the complex CRP mapping problem with high accuracy when limited training samples are available. Simulation results show that 5-10% improvements can be obtained by incorporating GIS ancillary data and other derived features in addition to multispectral imagery. This work validates the applicability of machine learning approaches to the complex real-world remote sensing applications.

关键词： Machine learning Geographic Information systems US Department of Agriculture Remote sensing Classification tree analysis Support vector machines Support vector machine classification Information retrieval Image retrieval Satellites

来源：评论

学校读者我要写书评

暂无评论

The influence of hydrologic information in long-term hydrothermal scheduling 15th

The influence of hydrologic information in long-term hydroth...

引用

15th World Congress of the International Federation of Automatic Control, 2002

作者： Martinez, L. Ballini, R. Soares, S. Department of Engineering System School of Electrical and Computer Engineering State University of Campinas Brazil Department of Computer Engineering and Industrial Automation School of Electrical and Computer Engineering State University of Campinas Brazil

ISBN: (纸本)9783902661746

This paper presents an evaluation of the benefits of streamflows forecasting in long-term hydroelectric scheduling problem. In the approach considered, at each stage of planning a forecast of the future inflows is made and an operational decision for the following stage is obtained by a deterministic optimization model, in a partial open-loop feedback control framework. The influence of the forecasting model in the performance of this control policy is analysed by simulation using historical inflows record. The effectiveness of the approach was measured using the mean and standard deviation values for hydro generation and operational costs during the planning period, taking into account the hydroelectric plants of the Southeast Brazilian system as a case study. Copyright © 2002 IFAC.

关键词： Forecasting

来源：评论

学校读者我要写书评

暂无评论

THE INFLUENCE OF HYDROLOGIC INFORMATION IN LONG-TERM HYDROTHERMAL SCHEDULING

引用

IFAC Proceedings Volumes 2002年第1期35卷 287-292页

作者： L. Martinez R. Ballini S. Soares Department of Engineering System School of Electrical and Computer Engineering State University of Campinas Department of Computer Engineering and Industrial Automation School of Electrical and Computer Engineering State University of Campinas

关键词： Hydrothermal Power systems Power Generation Prediction Methods Nonlinear Programming

来源：评论

学校读者我要写书评

暂无评论

A statistical approach to time frequency analysis of SEMG

A statistical approach to time frequency analysis of SEMG

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： M. Alemu D.K. Kumar A. Bradley School of Electrical & Computer System Engineering RMIT University Melbourne Australia

The aim of this study was to examine the influence of various external factors on the time-frequency (TF) content of surface electromyography (SEMG). The paper reports on a study of various factors like the level of muscle contraction, gender of the subject and inter electrode distance. A group of ten healthy subjects (five males and five females) performed isometric elbow flexions of the right arm at 20, 50 and 80% of their maximal voluntary contraction (MVC). The SEMG signal was recorded using surface electrodes placed at a distance of 18 and 36 mm over the biceps brachii muscle. WVD was used to extract the time frequency (TF) information of the signal and instantaneous frequency (IF) of the signal was extracted. Statistical analysis was performed on the IF values to determine the influence of each of the factors on the signal. The analysis indicates that there is a variation in the SEMG recordings for subjects based on gender, change of inter electrode distance and the level of muscle contraction. The IF at 50% was the highest compared with 20% and 80% MVC, while 20% was the lowest.

关键词： Time frequency analysis Muscles Electrodes Electromyography Data mining Statistical analysis Frequency estimation Elbow Root mean square Gaussian distribution

来源：评论

学校读者我要写书评

暂无评论

End-to-End Congestion Control via Optimal Bandwidth Allocation for Multimedia Streams 15

End-to-End Congestion Control via Optimal Bandwidth Allocati...

引用

15th International Conference on computer Applications in Industry and engineering, CAINE 2002

作者： Shyu, Mei-Ling Chen, Shu-Ching Luo, Hongli Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33199 United States

ISBN: (纸本)9781618395351

In this paper, an end-to-end congestion controlled optimal bandwidth allocation scheme with a transmission rate control mechanism for multimedia transmission is proposed. This rate control mechanism aims at minimizing the allocated rate and maximizing the utilization of the client buffer. By adjusting the transmission rate in response to the buffer occupancy and the playback requirements in the client, and variations in the network delay and packet loss rate, an acceptable quality-of-service (QoS) level can be maintained at the end systems. Simulation results show that our proposed scheme can generally achieve high network utilization and low losses, and no network support is needed. Copyright © (2002) by the International Society for computers and Their Applications All rights reserved.

关键词： Quality of service

来源：评论

学校读者我要写书评

暂无评论

Scene change detection by audio and video clues

Scene change detection by audio and video clues

引用

2002 IEEE International Conference on Multimedia and Expo, ICME 2002

作者： Chen, Shu-Ching Shyu, Mei-Ling Liao, Wenhui Zhang, Chengcui Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33 199 United States Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States

ISBN: (纸本)0780373049

Automatic video scene change detection is a challenging task. Using audio or visual information alone often cannot provide a satisfactory solution. However, how to combine audio and visual information efficiently still remains a difficult issue since there are various cases in their relationship due to the versatility of videos. We present an effective scene change detection method that adopts the joint evaluation of the audio and visual features. First, video information is used to find the shot boundaries. Second, the audio features for each video shot can be extracted. Lastly, an audio-video combination schema is proposed to detect the video scene boundaries. © 2002 IEEE.

关键词： Pattern recognition

来源：评论

学校读者我要写书评

暂无评论

A stochastic model for content-based image retrieval 3rd

A stochastic model for content-based image retrieval

引用

3rd IEEE Pacific Rim Conference on Multimedia, PCM 2002

作者： Shyu, Mei-Ling Chen, Shu-Ching Luo, Lin Shu, Chi-Min Department of Electrical and Computer Engineering University of Miami Coral GablesFL United States Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL United States Department of Environmental and Safety Engineering National Yunlin University of Science and Technology Touliu Yunlin Taiwan

ISBN: (纸本)3540002626

Multimedia data, typically image data, is increasing rapidly across the Internet and elsewhere. To keep pace with the increasing volumes of image information, new techniques need to be investigated to retrieve images intelligently and efficiently. Content-based image retrieval is always a challenging task. In this paper, a stochastic model, called Markov Model Mediator (MMM) mechanism, is used to model the searching and retrieval process for content-based image retrieval. Different from the common methods, our stochastic model carries out the searching and similarity computing process dynamically, taking into consideration not only the image content features but also other characteristics of images such as their access frequencies and access patterns. Experimental results demonstrate that the MMM mechanism together with the stochastic process can assist in retrieving more accurate results for user queries. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Stochastic models

来源：评论

学校读者我要写书评

暂无评论

Multi-domain mesh optical network protection using Hamiltonian cycles

Multi-domain mesh optical network protection using Hamiltoni...

引用

IEEE Workshop on High Performance Switching and Routing

作者： Hong Huang J.A. Copeland Comm System Centre School of Electrical & Computer Engineering Georgia Institute of Technology Atlanta GA USA

Designing simple and efficient network protection mechanism is an important requirement of optical networks, which is a challenging task for large mesh networks. We extend our previous work on Hamiltonian cycle protection to large-scale multiple domain inhomogeneous optical networks. We proposed two protection schemes with different trade-off between spare resource usage and failure isolation. Our proposed schemes are simple and competitive in network resource usage.

关键词： Optical fiber networks Protection Optical design Telecommunication traffic Traffic control SONET Mesh networks Large-scale systems Optimization methods Integer linear programming

来源：评论

学校读者我要写书评

暂无评论

Obstacle classification by a line-crawling robot: A rough neurocomputing approach 3rd

Obstacle classification by a line-crawling robot: A rough ne...

引用

3rd International Conference on Rough Sets and Current Trends in Computing, RSCTC 2002

作者： Peters, James F. Ahn, T.C. Borkowski, Maciej Department of Electrical and Computer Engineering University of Manitoba WinnipegMBR3T5V6 Canada Intelligent Information Control ann System Lab School of Electrical and Electronic Engineering Won-Kwang University 344-2 Shinyong-Dong Iksan Chon-Buk570-749 Korea Republic of

ISBN: (纸本)9783540442745

This article considers a rough neurocomputing approach to the design of the classify layer of a Brooks architecture for a robot control system. In the case of the line-crawling robot (LCR) described in this article, rough neurocomputing is used to classify sometimes noisy signals from sensors. The LCR is a robot designed to crawl along high-voltage transmission lines where noisy sensor signals are common because of the electromagnetic field surrounding conductors. In rough neurocomputing, training a network of neurons is defined by algorithms for adjusting parameters in the approximation space of each neuron. Learning in a rough neural network is defined relative to local parameter adjustments. Input to a sensor signal classifier is in the form of clusters of similar sensor signal values. This article gives a very brief description of a LCR that has been developed over the past three years as part of a Manitoba Hydro research project. This robot is useful in solving maintenance problems in power systems. A description of the basic features of the LCR control system and basic architecture of a rough neurocomputing system for robot navigation are given. A sample LCR sensor signal classification experiment is also given. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Electromagnetic fields

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：