检索结果-内蒙古大学图书馆

IEEE International Conference on Systems, Man and Cybernetics

作者： Johan J. Smit Oscar M. Piepers Edward Gulski Faculty of Electrical Engineering Mathematics and Computer Science Department High Voltage Components and Power Systems Delft University of Technnology Delft Netherlands Foundation for Knowledge Sharing and Research with utilities KSANDR Delft Netherlands

Maintenance decisions for high voltage assets are usually based on experience and failure statistics, however often too low sample sizes are available. On the one hand failure data do show that aging processes proceed inevitably in network components during a certain period of time before failure. Therefore diagnostic tools to assess the condition of high voltage components are very useful when the overall age of the electrical infrastructure increases. Depending on the diagnostic tool used, the results of the measurements involve different diagnostic parameters, e.g. partial discharge (PD) inception voltage, PD magnitudes at different voltages, tangent delta and return voltages. It is also known that aging and degradation, as failure mechanisms, are statistical in nature. On the other hand the amount of diagnostic data can be large, enabling an additional source of statistical information to estimate the time to failure more at specific components level. Due to stochastic behavior of the underlying degradation mechanisms the diagnostic data can be statistically interpreted. As a result boundaries for condition indexes for good, moderate and bad technical performance are derived, which are more adequately for implementation in an diagnostic decision support system of a utility, in particular to direct maintenance and replacement policy of components.

关键词： Decision support systems Indexing Asset management Voltage Partial discharges Aging Degradation Statistics Partial discharge measurement Failure analysis

来源：评论

学校读者我要写书评

暂无评论

Text Categorization Method Based on Improved Mutual Information and Characteristic Weights Evaluation Algorithms

Text Categorization Method Based on Improved Mutual Informat...

引用

International Conference on Fuzzy Systems and knowledge Discovery (FSKD)

作者： Zhili Pei Xiaohu Shi Maurizio Marchese Yanchun Liang College of Computer Science and Technology Key Laboratory of Symbol Computation and Knowledge Engineering of the Ministry of Education Jilin University Changchun China College of Mathematics & Computer Science National University of Inner Mongolia Tongliao China Department of Information and Communication Technology University of Trento Povo TN USA

The improvement of text categorization by statistical methods can be performed from two main directions, namely the feature selection and the evaluation of characteristic weights. In this paper, we propose an enhanced text categorization method based on a modified mutual information algorithm and evaluation algorithm of characteristic weights which improves both aspects. The proposed method is applied to the benchmark test set Reuters-21578 Top10 to examine its effectiveness. Numerical results show that the precision, the recall and the value of F1 of the proposed method are all superior to those of existing conventional methods.

关键词： Text categorization Mutual information Frequency shift keying Frequency estimation computer science Statistical analysis Testing Educational institutions Communications technology Performance evaluation

来源：评论

学校读者我要写书评

暂无评论

Barrier-free on the mobility and the information for visually impaired people and hearing impaired people

引用

Journal of the National Institute of Information and Communications Technology 2007年第3期54卷 125-132页

作者： Oyama, Shin'ya Igi, Seiji Nishimura, Takuichi Yairi, Ikuko Eguchi Department of Computer Engineering Hakodate National College of Technology Real-World Based Interaction Group Information Technology Research Institute National Institute of Advanced Industrial Science and Technology International Alliance Division Research Promotion Department Universal City Group Knowledge Creating Communication Research Center

We have been developing Robotic Communication Terminals (RCT) which support the self-mobility of the elderly and disabled people. One of the terminals we developed is "user-carried mobile terminal" which gives the information such as the navigation to visually and hearing impaired people who can walk by themselves. In this paper, we introduce the animation system to show the sign language for hearing impaired people and the voice guidance system for visually impaired people with the infrared communication and AM radio communication.

关键词： Mobile robots

来源：评论

学校读者我要写书评

暂无评论

Milling of multi-relational association rules

引用

Ruan Jian Xue Bao/Journal of Software 2007年第11期18卷 2752-2765页

作者： He, Jun Liu, Hong-Yan Du, Xiao-Yong Department of Computer Science and Technology Renmin University of China Beijing 100872 China Department of Management Science and Engineering Tsinghua University Beijing 100084 China Key Laboratory of Data Engineering and Knowledge Engineering Beijing 100872 China

Association rule mining is one of the most important and basic technique in data mining, which has been studied extensively and has a wide range of applications. However, as traditional data mining algorithms usually only focus on analyzing data organized in single table, applying these algorithms in multi-relational data environment will result in many problems. This paper summarizes these problems, proposes a framework for the mining of multi-relational association rule, and gives a definition of the mining task. After classifying the existing work into two categories, it describes the main techniques used in several typical algorithms, and it also makes comparison and analysis among them. Finally, it points out some issues unsolved and some future further research work in this area.

关键词： Data mining

来源：评论

学校读者我要写书评

暂无评论

Preface

引用

计算机科学技术学报（英文版） 2007年第2期22卷插1-插2页

作者： Shan Wang Jian-Zhong Li Scholl of Information Key Lab Data Engineering and Knowledge EngineeringRenmin University of China Department of Computer Science and Technology Harbin Institute of Technology

Recent advances in database related applications propose many new challenges and have inspired database researchers and practitioners to further make their efforts on new database technologies.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Waters network's potential to transform environmental engineering education

Waters network's potential to transform environmental engine...

引用

114th Annual ASEE Conference and Exposition, 2007

作者： Eschenbach, Elizabeth Montgomery, Jami Johnson, James Brus, Chris Carlson, Patricia Giammar, Dan Grauer, Bette Hotaling, Liesl Oguntimein, Gbekeloluwa Safferman, Steven Wentling, Tim Humboldt State University United States Department of Environmental Resources Engineering Humboldt State University United States WATERS Network - CLEANER Project Office Network Howard University United States Department of Environmental Engineering College of Engineering Architecture and Computer Sciences Howard University United States American Academy of Environmental Engineers United States University of Iowa United States Program University of Iowa United States Rose-Hulman Institute of Technology United States Department of Rhetoric Rose-Hulman Institute of Technology United States National Research Council U. S. Air Force United States NASA's Classroom of the Future Wheeling WV United States Washington University United States Department of Energy Environmental and Chemical Engineering Washington University St. Louis United States Environmental Studies Program Center for Materials Innovation United States McPherson High School United States McPherson High School McPherson KS United States Stevens Institute of Technology United States Stevens Institute of Technology United States Morgan State University United States Michigan State University United States Biosystems and Agricultural Engineering Department Michigan State University United States University of Dayton United States Education Planning Committee National Center for Supercomputing Applications United States Department of Information Science Graduate School of Library and Information Science National Center for Supercomputing Applications University or Illinois United States Knowledge and Learning Systems Group NCSA United States

The WATERS Network (WATer and Environmental Research Systems Network) will be an integrated real-time distributed observing system which will enable academic and government scientists, engineers, educators, and practitioners to advance effective management of our nation's water resources by understanding human interactions with water and the natural and built environment. WATERS will provide easily accessible real time environmental data as well as analysis tools to engineers, scientists, educators, K- graduate students and policymakers so they can better understand how water quantity, quality and related components of the hydrologic cycle are impacted by natural and human influences. The WATERS strategic plan will be completed by July 2007 and requires constituent input. This paper describes the draft Conceptual Design and the Education Plan of WATERS Network. This paper will highlight the potential impact of WATERS on undergraduate and graduate environmental engineering education in order to elicit input from the environmental engineering education community on how WATERS Network could better meet the future needs of undergraduate and graduate students and educators. More information can be found at ***. © American Society for engineering Education, 2007.

关键词： Water resources

来源：评论

学校读者我要写书评

暂无评论

A Depth-first Algorithm of Finding All Association Rules Generated by a Frequent Itemset

引用

Journal of Donghua University(English Edition) 2006年第6期23卷 1-4,9页

作者：武坤姜保庆魏庆 Institute of Data and Knowledge Engineering Henan University Institute of Data and Knowledge Engineering Henan University The Computer Science Department Henan University of Finance and Economics

The classical algorithm of finding association rules generated by a frequent itemset has to generate all non-empty subsets of the frequent itemset as candidate set of consequents. Xiongfei Li aimed at this and proposed an improved algorithm. The algorithm finds all consequents layer by layer, so it is breadth-first. In this paper, we propose a new algorithm Generate Rules by using Set-Enumeration Tree (GRSET) which uses the structure of Set-Enumeration Tree and depth-first method to find all consequents of the association rules one by one and get all association rules correspond to the consequents. Experiments show GRSET algorithm to be practicable and efficient.

关键词： association rule frequent itemset breath-first,depth-first consequent.

来源：评论

学校读者我要写书评

暂无评论

引用

8th Asia-Pacific Web Conference, APWeb 2006: Frontiers of WWW Research and Development

作者： Liang, Bangyong Tang, Jie Li, Juanzi Wang, Kehong Knowledge Engineering Group Department of Computer Science Tsinghua University 100084 Beijing China

ISBN: (纸本)3540311424

This paper addresses the issue of ontology caching on semantic web. The Semantic Web is an extension of the current web in which information is given well-defined meaning, better enabling computers and people to work in cooperation. Ontology serves as the metadata for defining the information on semantic web. Ontology based semantic information retrieval (semantic retrieval) is becoming more and more important. Many research and industrial works have been made so far on semantic retrieval. Ontology based retrieval improves the performance of search engine and web mining. In semantic retrieval, a great number of accesses to ontologies usually lead the ontology servers to be very low efficient. To address this problem, it is indeed necessary to cache concepts and instances when ontology server is running. Existing caching methods from database community can be used in the ontology cache. However, they are not sufficient for dealing with the problem. In the task of caching in database, usually the most frequently accessed data are cached and the recently less frequently accessed data in the cache are removed from it. Different from that, in ontology base, data are organized as objects and relations between objects. User may request one object, and then request another object according to a relation of that object. He may also possibly request a similar object that has not any relations to the object. Ontology caching should consider more factors and is more difficult. In this paper, ontology caching is formalized as a problem of classification. In this way, ontology caching becomes independent from any specific semantic web application. An approach is proposed by using machine learning methods. When an object (e.g. concept or instance) is requested, we view its similar objects as candidates. A classification model is then used to predict whether each of these candidates should be cached or not. Features in classification models are defined. Experimental results indicat

关键词： Data structures

来源：评论

学校读者我要写书评

暂无评论

Dynamic information granulation and information processing with imprecision and uncertainty

Dynamic information granulation and information processing w...

引用

5th International Conference on engineering Computational Technology, ECT 2006

作者： Holland, A. Fathi, M. Department of Electrical Engineering and Computer Science Institute of Knowledge Based Systems University of Siegen Germany

ISBN: (纸本)1905088094

In this paper we address and discuss the problem of learning graphical models using structure learning algorithms. We present a new enhanced parameterized structure learning approach. A concurrent fusion method to aggregate expert knowledge stored in distributed knowledge bases or probability distributions is also described. Experimental results of a case study show that our approach can improve the efficiency of learning structure algorithms for knowledge fusion applications. © 2006 Civil-Comp Press.

关键词： Probability distributions

来源：评论

学校读者我要写书评

暂无评论

Benchmarking knowledge-based context delivery systems

Benchmarking knowledge-based context delivery systems

引用

2006 International Conference on Autonomic and Autonomous Systems, ICAS'06

作者： Keeney, John Lewis, David O'Sullivan, Declan Department of Computer Science Knowledge and Data Engineering Group Trinity College Dublin Dublin Ireland

ISBN: (纸本)0769526535

As context-aware systems become more widespread and mobile there is an increasing need for a common distributed event platform for gathering context information and delivering to context-aware applications. The likely heterogeneity across the body of context information can be addressed using runtime reasoning over ontology-based context models. However, existing knowledge-based reasoning is not typically optimised for real-time operation so its inclusion in any context delivery platform needs to be carefully evaluated from a performance perspective. In this paper we propose a benchmark for knowledge-based context delivery platforms and in particular examine suitable knowledge benchmarks for assessing the ability of platforms to deal with semantic interoperability. © 2006 IEEE.

关键词： Benchmarking

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：