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evidence theory
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  evidence theory
Rulegraphs check this compatibility between unary and binary rules by combining evidence theory with graph theory.
      
Formalisms such as probability theory and Dempster-Shafer evidence theory have proposed specific forms for these operators.
      
Both techniques rely on the mathematical tools of evidence theory, which are customized here for application to total uncertainty in track forecasts.
      
Application of evidence theory to quantify uncertainty in hurricane/typhoon track forecasts
      
This essay investigates this connection in detail, pointing to the usefulness of evidence theory to formalise and extend Shackle's decision theory.
      
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Using evidence theory method in dealing with inexact and uncertain ka- owledge expression and reasoning in domxain expert system,can overcome the defaults by using probabitiy theory or certainty factor methods,be able to mimic human domain expert's inferenci(?)g and decition making characteristics more effectively.But this theory has not been practiced really in expext system until today.This paper will make a applicable analysis ordeal ing with uncertain reasoning by using of evidence theory...

Using evidence theory method in dealing with inexact and uncertain ka- owledge expression and reasoning in domxain expert system,can overcome the defaults by using probabitiy theory or certainty factor methods,be able to mimic human domain expert's inferenci(?)g and decition making characteristics more effectively.But this theory has not been practiced really in expext system until today.This paper will make a applicable analysis ordeal ing with uncertain reasoning by using of evidence theory in MEDDIA,which we are building,the mechnical defaults diagnosis expert system,show some insight relationship with certainty factor model and probability theory methods,exhibit concrete steps or methods of applging this theory for future researchi(?)g.

在领域专家系统不确定性知识表达及推理问题上,证据理论方法能克服纯概率理论方法和信任模型方法的缺点和不足,并能较强地模拟人类领域专家的推理、判断特征。但至今,证据理论尚未真正在专家系统中应用实现。本文对机械故障诊断专家系统 MEDDIA 应用证据理论来处理不精确性推理问题作了可行性分析,讨论了其与信任模型之间的内在联系,并就应用该理论具体工作步骤作了说明。

Based on fuzzy relation inference language FRIL, this paper introduces the support-pair theory used to deal with a variety of uncertainties, and investigates a general principle of implementing fuzzy logic programming language on the basis of multiplication model. Based oofn Zadeh's fuzzy set theory and Shafer's evidence theory, the uncertainties of fact clause and rule clause are represented by support-pairs. This kind general language is a query one similar to PROLOG, which is used to represent knowledge...

Based on fuzzy relation inference language FRIL, this paper introduces the support-pair theory used to deal with a variety of uncertainties, and investigates a general principle of implementing fuzzy logic programming language on the basis of multiplication model. Based oofn Zadeh's fuzzy set theory and Shafer's evidence theory, the uncertainties of fact clause and rule clause are represented by support-pairs. This kind general language is a query one similar to PROLOG, which is used to represent knowledge and to reason with uncertainties in expert systems.

本文以模糊关系推理语言FRIL为背景,介绍了用于处理各种不确定性的支持对理论(support-pair theory),探讨了基于积模型(multiplication model)的一般的模糊逻辑程序设计语言的基本设计原理。这类通用的语言是一种类似于PROLOG的查询类型语言。基于Zadch的模糊集理论和Shafer的证据理论,其事实和规则语句的不确定性用支持对来度量。这类通用语言为在专家系统中表达知识和进行不确定推理提供了一个强有力的新工具。

In this paper,we discuss two approachesto handle knowledge uncerrainty in ExpertSystems,numerical method and non-numericalmethod,including Subjective Bayesian method,CF modle,Evidence theory,Possibility theo-ry,Endorsement theory,Non-monotonic logicand Truth Maintenance Systems,and analysetheir advantages and disadvantages.

本文介绍专家系统中不确定性处理的两种途径,即数值方法和非数值方法,简要分析各种数值方法的基本思想和其局限性,并着重讨论保证理论和非单调逻辑以及真值维护系统等非数值方法.

 
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