基于粒度的知识获取方式

A Method on Knowledge Acquisition Based upon the Granularity

众所周知，知识获取是专家系统开发的“瓶颈”问题。本文运用分形理论从新的角度进行了探讨。分析了人类思维和知识获取的特点。由自相似性出发说明了引入分形思想的必要性，介绍了基于分形几何的问题分类。研究了基于分形思想的知识获取，给出了详细的实施步骤，这是一个渐进式过程，并以复杂系统的故障诊断为例对此进行了说明，最后给出了这种知识获取方式的特点。

t is well known that knowledge acquisition is the' bottle neck' problem in developing expert sys-tems. This paper makes a study on knowledge acquisition from new view by utilizing fractal theory,Firat, the features of human thinking and knowledge acquisition are analysed, and the necessity of in-troducing the idea of fractal is stated from the view of self similarity. Then the brief survery of fractaltheory is given. A study on knowledge acquisition based upon the idea of fractal is made. The imple-mentation steps is given in detail, it is an advance gradually progress. Fault diagnosis of complex sys-tems is taken as an example to illustrate the knowledge acquisition process. Finally ,the characteristicsof knowledge acquisition are given.