知识库系统

Domain knowledge and teaching schedule are main parts of ITS, this thesis describes the research on knowledge base and course schedule.

领域知识库和教学调度是智能教学系统的核心内容，本文对知识库和课程规划进行了研究。

Since the existing vehicle driving simulator is lack of incarnating the contents of road sign and Highway Code, the road sense instruction system based on knowledge base is put forward and the detailed road sense database is composed; a simple and practical UI is constituted to make the bald booklore put more road sense into the process of virtual driving.

针对目前汽车驾驶模拟器存在的道路标识、标线及交通法规知识内容体现不足的问题，提出了一种基于知识库的汽车驾驶知识学习系统框架，构建了详细的驾驶知识数据库；建立了简单实用的用户界面，将枯燥的书本知识变得简单生动；同时，将知识库知识与虚拟驾驶模拟器融合，使驾驶知识融入虚拟驾驶全过程。

The development tool of Visual C++ to construct knowledge base of BES support KEM of Object-Oriented theory well, and can divide the construction and maintenance of knowledge base, reasoning process from the development of Human-Computer Interface efficiently.

利用Visaul C++开发工具来构建汽车专家系统知识库，很好地支持了面向对象的知识表示，能有效地将知识库的建立和维护、推理过程与用户界面的开发分隔开，提高了程序开发效率。

First, this thesis introduces basic theory of CBR , and studies many aspects of typical part design case , such as case representation, case retrieval, retain etc. Second, regards design code as case code in order to integrate the case with geometrical and non- geometrical information, and realizes the parametric modifying function for 3D solid model in the condition of Pro/E. Third, for the purpose of making true of system's aided design requirement, this thesis brings forward to create part design knowledge base with AI language CLIPS, and integrates the rule based KB into the system; finally, collects and summarizes the knowledge of shaft,gear,sleave, and a sample with ladder—shaft is shown in order to verify the correction of theory research.

首先，本文介绍CBR技术的基础理论，并重点研究典型零件案例的表示、检索、修改等功能；其次，以零件设计编号为案例编号实现对案例的几何与非几何信息的集成，并实现了三维实体模型在Pro／E环境下的参数化修改功能；再次，从系统辅助设计功能要求出发，提出将基于规则的知识库嵌入到系统内部，用人工智能语言CLIPS建立零件设计知识库；最后，对轴类、齿轮类、盘套类零件案例知识进行收集、总结，并通过阶梯轴设计实例验证了理论研究的正确性。

This dissertation studies the knowledge base of the vibration fault diagnostic system for turbogenerator unit and discusses the diagnostic model, knowledge representation, knowledge base structure, knowledge acquisition, knowledge management and vertification, and so on.

本文对汽轮发电机组振动故障诊断系统的知识库进行了研究，对诊断模型选择、知识表示、知识库体系结构与知识管理维护等方面的内容进行了探讨。

Throught adaptive algorithm of network, the system constantly revise right values distribute so as to meet goal. Distribute the heuristic knowledge and the experience knowledge to network interconnection and right value.?The reasoning machine carries on reasoning according to the knowledge that involve in knowledge base and fact that users offer.?Through front computation of nerve network, the output port obtains the output vector.?The explanation module of ES is explained to user.At last, this paper has realized grab hydraulic system based on ANNES intelligent diagnosis, it has proven this fault diagnosis method feasibility.

ANNES的工作过程是：①首先建立知识库；②学习系统获取知识时，它只要求专家提供范例及相应的解，通过神经网络学习算法对样本进行学习，经过网络内部自适应算法不断修改权值分布以达到要求，把专家求解实际问题的启发式知识和经验分布到网络的互连及权值分布上；③推理机根据知识库中的知识和用户提供的事实进行推理；④通过神经网络的前向计算，在输出端获得输出矢量：⑤经专家系

A knowledge base model based on the combination of the reduced fault tree and the LCU trapezia logic structure is designed after a thorough research on the knowledge base system and the reasoning mechanism of the locomotive fault diagnosis system.

通过对机车故障诊断系统知识库体系和故障诊断推理机制的研究，设计了以简化的电力机车故障树为基础，结合LCU梯形图逻辑构造的知识库原型；应用机车故障诊断双向推理机制，设计并实现了基于LCU处理逻辑的正向推理机以及基于故障树查询的逆向推理机；并以此为基础开发了电力机车远程故障诊断系统的原型，实现了对机车的远程故障诊断。

Chapter 3 presents the object-oriented knowledge model, gives the knowledge representation method which combing the object-oriented with generation rule; ascertains the relation between entities in knowledge base of assembly unit partition; expatiates the reasoning policy and conflict solution policy.Chapter 4 presents make two steps to finish the assembly unit partition, which are the main assembly unit partition and unassembled partition, interlude using knowledge.

第三章提出了面向对象的知识模型，结合飞机产品特点，提出了面向对象与产生式规则相结合的知识表示方法；以装配工艺快速设计支持系统的知识库结构为基础，明确了装配单元划分系统知识库中实体间联系；阐述了知识的正向推理策略及冲突消解策略。

According to the data structure of the system database, this thesis conjoins the breath-first search and the depth-first search, and constructs the positive direction reasoning mechanism to make use of the specialty knowledge in the database.

根据系统知识库的数据结构和知识的表达方式，采用广度优先搜索和深度优先搜索相结合的策略，建立正向推理机制以实现对系统知识库中专业知识的利用。

The dissertation focused on the technologies, algorithm and application of WBSDM, and the main studies and new contributions are described as follows: 1. Technologies of spatial data mining and web-based data mining are summarized and then the concept of WBSDM is put forward and its main functions and meaning of research are disserted in detail. 2. The framework of web-based spatial data mining is presented. And its background, definition, features, functions, system structure, implementation strategy, key technologies and so on are illustrated systematically.

本项研究旨在总结空间数据挖掘技术和基于Web的数据挖掘技术及WBSDM的应用前景；系统地提出基于Web的空间数据挖掘框架；设计基于XML/J2EE的WBSDM平台模型；将MAS(Multi-AgentSystem)技术引入WBSDM并提出应用策略；研究基于粗糙集的空间知识库刻画模型，提出并实现高维数据的特征提取和数据浓缩算法；提出并实现基于知识库的知识发现模型；构造一个WBSDM的原型实验系统，对本文的相关研究进行验证。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。