知识库

The purpose of this dissertation is to build the oriented mechanism knowledge system for double wishbone suspension expert system and use the knowledge to build ex.

本文的目的是建立双横臂悬架专家系统导向机构的知识体系，以便进一步建立双横臂悬架专家系统知识库。

In knowledge base the knowledge may produce the inconformity, in appliedly these knowledgeses proceed logically, would seriously affect the reason logically process the knowledge efficiency, even will produce the fata mistakes.

摘 要：在知识库中知识可能会产生不1致，在应用这些知识进行推理时，会严重影响推理过程中知识的推理效率，甚至会产生错误。

In knowledge base the knowledge may produce the inconformity, in appliedly these knowledgeses proceed logically, would seriously affect the reason logically process the knowledge efficiency, even will produce the fata mistakes.

摘 要：在知识库中知识可能会产生不一致，在应用这些知识进行推理时，会严重影响推理过程中知识的推理效率，甚至会产生错误。

This paper researches the basic principle of fuzzy retrieval on multimedia data semantics, designs a fuzzy reasoning mechanism of Agent knowledge base, puts the fuzzy algorithm wich reasoning is forward or backword,and relevant implementation is presented as well.

引 言目前计算机科学的许多研究正沿着&智能化&的方向发展，多媒体数据库的复杂查询正面临着新的挑战〔1〕。因此，将语义学、多 Agent系统、知识库、模糊理论、人工智能等领域知识综合，运用于多媒体数据库数据语义的模糊检索，有着极其重要的研究意义。

The content of this thesis contains the overview of the waste incinerator site selection problems and multi-criteria decision making theory, the development of a flamework for multi-criteria siting selection process, the establishment of evaluation factors, the completement of an expert decision support system for a waste incinerator site selection model, and the empirical application of a real world waste incinerator site selection existing in Taichung City.Keywords : NIMBY Facility、 Expert Decision Support System、 Combinatorial Optimization Mathematical Programming Models、 Multi-criteria Decision Analysis、 Analytic Hierarchy?Process 、Multi - attribute Utility Function MAUF

先以区位可行性筛选方式进行分析，并结合数学规划模式与多属性效用评估方法进行垃圾焚化厂区位选择之多准则评估作业；（3）评估项目阶层架构之研拟，并由专家问卷获得评估因子权重值及评估指标操作定义，以进一步建构专家知识库；（4）建立一焚化厂区位选择专家决策支援系统，以辅助规划及决策人员进行垃圾焚化厂区位选择之方案评估作业；（5）最后针对台中市设置垃圾焚化厂设施的区位选择问题进行本专家决策支援系统之操作。

A knowledge base with self-contained functions and knowledge can consumedly improve efficiency and accuracy of a question answering system.

一个功能和知识完备的知识库能够大大提高问答系统的效率与准确率。

In the former representation, if no restrictions are imposed on formulas, then there is no algorithm to realize the reasoning in the resulted knowledge base; in the latter representation, the reasoning in the ontology represented by the description logic is decidable, while in general, for mathematical knowledge described by the first order logic which contains the ontology represented by the description logic, there is no algorithm to realize its reasoning.

在前者的表示中，如果对公式不作任何限制，那么得到的知识库中的推理不是可算法化的；在后者的表示中，以描述逻辑描述的本体中的推理是可算法化的，而以本体为逻辑语言的一部分的一阶逻辑所表示的数学知识中的推理一般是不可算法化的。

By combining a knowledge base that consists oaf number of facts about chemistry with a reasoning capability similar to that of a chemist, DENDRAL usable to outperform a human chemist in the specific task of narrowing down the choices of possible structures of a compound.

DENDRAL把由很多有关化学的知识构成的知识库与类似于化学家的推理能力结合起来，就能在元素结构的选择这种有限范围内的任务中胜过化学家。

On the base of applied tech. and system structure, the key tech. are expressed in detail. It includes:Knowledge representation technology: it is described in two stages by "Depictive frame + Rule group"."Depictive frame" is used to reflect the factors concerning question field."Rule group" reflects the son-question in question field; knowledge management system: it is made up of knowledge-base editing component, factor classifying component, knowledge inspecting component and extractive knowledge component; uncertainty reasoning adopt method of elicitation search strategy and data drive controlled by member knowledge. It take reliability of compound proof at first. That can resolve the matching contradiction. Reasoning explanation introduce pre-text and followed method of resolving path. Knowledge discovery component take SLIQ as basic arithmetic. It provides classification model in two stage forms which aim at training suit. That is decision tree and productive rule.

在确定应用技术与系统结构的基础上，重点阐述了本文的核心技术，这包括：知识表示技术，采用&描述框架+规则组&的层次结构，&描述框架&用于描述问题域所涉及的因素，&规则组&反映问题域内的子问题；知识管理系统，由知识库编辑构件、因素分类构件、知识检测构件和知识求精构件组成；不确定性推理机采用启发式搜索策略，元知识控制的数据驱动，以复合证据可信度优先作为匹配冲突消解的策略，推理解释采用预置文本与求解路径追踪的方法；知识发现，采用SLIQ快速可伸缩算法，分类模型用判定树与产生式规则两种形式描述。

Directing to productive rule account of rule reason and the problems to be dealt with in petroleum storage and transportation safety production management, I put forward Interactive Dichotomic versions 3 to carrying out data mining.

通过将数据按属性分类，建立表格形式，进行数据计算，最后产生决策树，生成规则，并把规则输入到基于规则推理的决策支持系统之中，以完善系统的知识库。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。