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1.
基于事例推理的技术及其应用前景   总被引:56,自引:6,他引:50  
文章从基于事例推理(CBR)的研究者及使用者的角度,介绍了目前在CBR中较成熟的技术,重点介绍了事例表示,事例检索,事例修改以CBR开发工具等,并分析了其中的不足,指出了CBR的发展前景。  相似文献
2.
基于事例的推理(CBR)研究综述   总被引:43,自引:2,他引:41  
基于事例的推理(CBR)作为一种增量式的学习方法,规避了传统人工智能在知识获取上的瓶颈问题,逐渐引起人工智能领域研究者的关注。对基于事例的推理(CBR)现有研究工作进行逻辑上的梳理和系统的总结,有助于今后研究工作的开展,具有深远的理论意义。该文首次提出基于事例的推理(CBR)研究的逻辑体系结构,并在此逻辑分析的基础上,从基本理论、关键技术和实践应用三方面进行了综述,对其中关键、通用的方法和技术进行了比较和评价。最后,对未来的研究方向进行了展望。  相似文献
3.
An introduction to case-based reasoning   总被引:29,自引:0,他引:29  
Case-based reasoning means using old experiences to understand and solve new problems. In case-based reasoning, a reasoner remembers a previous situation similar to the current one and uses that to solve the new problem. Case-based reasoning can mean adapting old solutions to meet new demands; using old cases to explain new situations; using old cases to critique new solutions; or reasoning from precedents to interpret a new situation (much like lawyers do) or create an equitable solution to a new problem (much like labor mediators do). This paper discusses the processes involved in case-based reasoning and the tasks for which case-based reasoning is useful.This article is excerpted from Case-Based Reasoning by Janet Kolodner, to be published by Morgan-Kaufmann Publishers, Inc. in 1992.This work was partially funded by darpa under Contract No. F49620-88-C-0058 monitored by AFOSR, by NSF under Grant No. IST-8608362, and by ARI under Contract No. MDA-903-86-C-173.  相似文献
4.
Hybrid Recommender Systems: Survey and Experiments   总被引:24,自引:0,他引:24  
Recommender systems represent user preferences for the purpose of suggesting items to purchase or examine. They have become fundamental applications in electronic commerce and information access, providing suggestions that effectively prune large information spaces so that users are directed toward those items that best meet their needs and preferences. A variety of techniques have been proposed for performing recommendation, including content-based, collaborative, knowledge-based and other techniques. To improve performance, these methods have sometimes been combined in hybrid recommenders. This paper surveys the landscape of actual and possible hybrid recommenders, and introduces a novel hybrid, EntreeC, a system that combines knowledge-based recommendation and collaborative filtering to recommend restaurants. Further, we show that semantic ratings obtained from the knowledge-based part of the system enhance the effectiveness of collaborative filtering.  相似文献
5.
案例推理在故障诊断系统中的应用   总被引:19,自引:1,他引:18  
将基于案例的推理方法应用于智能故障诊断系统中,具体讨论了故障案例库和结果库的建立,并将其用关系数据库的格式进行存储。应用灰色关联理论和模糊集结合矢量投影学,给出了关联度的定义和计算方法,从而可以准确地检索到相似的故障案例,对待检测故障给出定性或者定量的分析。  相似文献
6.
基于案例推理的金融危机预警支持系统   总被引:19,自引:1,他引:18  
传统方法与模型预测金融危机有较大的局限性,该文提出用基于案例推理方法预测金融危机的思想,并给出基于案例推理的金融危机预警系统CBRFCPSS的原型,研究了CBRFCPSS中的关键技术:案例的知识表达、案例检索和案例学习等.文章最后给出了应用原型系统进行金融危机预警的部分研究成果.  相似文献
7.
Web services are currently one of the trends in network-based business services, which intuitively will be applied to build a semantic web-based decision support system (DSS). Since web services are self-contained, modular business process applications, based on open standards, enable integration models for facilitating program-to-program interactions. Decision modules in a semantic web-based DSS can be viewed as a web service. However, according to the current features, web services know only about themselves, they are neither autonomous, nor are they designed to use ontologies; they are passive until invoked, and they do not provide for composing functionalities. These lead to the motivation on building a sophisticated web service to contain these features and to utilize web services on behalf of the user. This paper aims to propose a new concept of Meta Web Service, a web service-based DSS. The meta web service understands the user's problem statement with ontology, performs web service discovery, web service composition, and automatically generates codes for composite web service execution. Case-based reasoning is applied to quickly find past histories of successful service compositions. A prototype of research web service has been developed to show the feasibility of the proposed idea.  相似文献
8.
一个基于范例推理的专家系统ICMIX   总被引:15,自引:0,他引:15  
蛋鸡饲料配方是一个要求考虑多种制约因素,需要丰富的富实践经济的问题域。本文介绍的ICMIX是基于范例推理的蛋鸡饲料配方专家系统,其范例向面规划模型,由日粮类型子范例和营养标准子范例构成。  相似文献
9.
Exception Handling in Workflow Systems   总被引:13,自引:0,他引:13  
In this paper, defeasible workflow is proposed as a framework to support exception handling for workflow management. By using the justified ECA rules to capture more contexts in workflow modeling, defeasible workflow uses context dependent reasoning to enhance the exception handling capability of workflow management systems. In particular, this limits possible alternative exception handler candidates in dealing with exceptional situations. Furthermore, a case-based reasoning (CBR) mechanism with integrated human involvement is used to improve the exception handling capabilities. This involves collecting cases to capture experiences in handling exceptions, retrieving similar prior exception handling cases, and reusing the exception handling experiences captured in those cases in new situations.  相似文献
10.
基于神经网络的范例推理   总被引:11,自引:2,他引:9  
目前对于基于范例推理的研究越来越受到人们的重视。本文探讨用神经网络来实现范例推理系统,用此方法建造一个高效的范例推理系统,并给出了一些算法。  相似文献
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