知识库

And the CVE knowledge base of the system traces international newly development trends of CVE, establishing internal unified CVE standards, whose abundant knowledge base settle ununified problem of internal flaw base, and has great practical value.

同时，本系统所基于的CVE知识库，跟踪国际上CVE的最新发展动态，制订了国内统一的CVE标准，具有极大丰富的知识库，有效的解决了国内漏洞库不统一的问题，有很大的实用价值。

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。

This creates a new problem if the knowledge base is to be updated as changes require substantial effort in reconstituting the coded rules in order to implement the needed changes.

这带来了新问题，当知识库需要更新，为了实现需要的改变，知识库需要大量的工作来重新构造编码规则。

To avoid the collision accidents of ships at sea, with the universalizing and application of computer, and the development and maturity of the technology of Expert System and Artificial Intelligent, this paper developed an intelligent collision avoidance expert system for navigation. The main research work centers on several aspects, which will be represented as below:By the navigation rules" understanding and analyzing, and by the navigation experience and navigation samples" collecting and trimming, we put forth and build a multi-unit and layering KB systematic structure, and implement the KBM. According to features of different knowledge, we adopt multifarious KR, such as: frame KR, production rule KR, procedure KR. We also build a multi-inference system, which based on analog inference, forward illation inference, conversion inference and meta-rule inference. At the same time, we develop each reasoning algorithm. For some problems in collision avoidance region during the building of the expert system, we put forth and build a set of models to solve them using neural network technology.

为了避免船舶间碰撞事故的发生，结合计算机技术在各类船舶中的普及与应用、专家系统技术及人工智能技术的发展、成熟，本文研制、开发了一种具有一定智能的航海避碰专家系统，主要内容包括以下几个方面：通过对航海规则的理解与分析，对航海经验、航海实例的搜集、整理，提出并建立起了航海避碰专家系统的多元分层知识库体系结构，并实现了知识库的管理；根据不同知识的特点，分别采用了框架、产生式规则、过程等多种知识表示方法；提出了一种基于类比推理、正向演绎推理、换位推理及元级推理等的多种推理机制，并建立起了相应的推理算法；引入神经网络技术，针对在建立专家系统过程中所遇到的有关避碰领域内的一些难题，提出并建立了相应解决问题的模型，其中包括：船舶类型的识别，会遇态势的分类及避碰危险的评估。

By analyzing the structure of process knowledge in deep drawing, a new featurebased hierarchical object model of knowledge for deep-drawing process is proposed, which constructs the knowledge base well, and so enables the mapping from forming feature to knowledge base.

通过对拉深工艺知识的结构分析，提出了基于特征的拉深工艺知识的层次对象模型，解决了工艺知识库中知识结构的编排和知识存储、管理，使得由成形特征向知识库的映射成为可能。

Combined with the KBE-Based design of Turbo Expansion Engine, the acquisition, classi- fication, deduction and application about the knowledge was introduced on the theory of general knowledge database.

结合基于KBE的透平膨胀机设计，以广义知识库概念为理论基础，阐述了设计中知识的获取、分类到推理、应用等一系列过程的工作，分析了建立的深层和浅层知识系统，在传统知识工程的基础上，提出了将广义知识库与大型CAD软件知识熔接工具相结合的设计框架。

Key approaches in the construct tool including:① knowledge bases integrality checking models,②knowledge base maintenance instructing templets,③ process planning parameter language description method,④ object-oriented manufacturing resource bases operating method.

文章给出了知识库完备性检验的模型，介绍了基于此引导模板的知识库维护方式；提出了一种参数化工艺规程语言描述方法；分析了面向对象的制造资源库的操作方法。

In addition to guiding the operation of each processing module, the knowledge base also controls the interaction between the processing modules and the knowledge base, opposed to single-headed arrows linking the processing modules.

除了引导每一个处理模块的操作，知识库还要控制模块间的交互。这一特性在图1.23中的处理模块和知识库问用双头箭头表示。相反，单头箭头连接处理模块。

The main items are listed as follows: 1.Content Indicator: School institution, information infrastructure. 2.Input Indicator: Information technology capital, school web page, and school knowledge bank. 3.Process Indicator: Member assignment, knowledge management strategy, knowledge management institution, teacher's teaching process, and administrators' working process.

其中背景指标包括：学校制度结构、资讯基础建设；输入指标为资讯科技资本、学校网页建置、学校知识库建置；过程指标为人才的任用、知识管理策略、知识管理制度、教师教学过程、行政运作过程；成果指标为知识管理文化、知识管理愿景、资讯与通讯科技成果、知识管理评鉴、知识库的成效。

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。