Study on Knowledge Reprsentation and Knowledge Processing for Problem Sdving in Mechanical Engineering

机械工程问题求解的知识表示与知识处理研究

• 批准号: 61460100
• 负责人: NAKAMURA Ikuo
• 金额: $ 3.9万
• 依托单位: Nagoya Univ.
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61460100/
• 关键词: Knowledge Engineering; Problem Sdving; Knowledge Representation; Production System; Japanese Text Understanding; Mechanical Engineering; LISP; 流体工学; 機械力学

In order to investigate the applicability of Knowlodge engineering to mechanical cugineering, we took up the elementany problems in fluid mechanies and studied the human activity of problem solving. Then we tried to develop the simulation program of this process.In 1986, we took the fluid property problems into consideration, as time independent, motionless and no change of state problems. There are three kinds of data in these problems. 1: data proper to real objects, 2: equations which relate the physical values, 3: data of common sence and tacit understanding. Constructed automatic solver found the path from unknown variables to known variables.We also developed the consultation system using the production system, which gave advice to solve the static prombems in fluid mechanics. This system simulated the human process which found solution in accordance with the given and goal variables. Powerful capability controlling the inference mechanism was installed and solution process was carried out by the conversation between the system and users.「 In 1987, Composite problems were included, which consisted of upper and lower worlds. Upper world related the independent lower worlds. For example, the upper world of momentum exchange rules governs the lower worlds of momentums before and after exchanges. We developed the production system which processed the hierarchical knowledge bases, and then constructed the practical sysbom solving composito problems. We showed the efficiency and capability of this production system.We investigated the Japanese composition rules and semantics characteristic of fluid mechanics. Intelligent interface for Japanese input text was producted, which translated the input statement into internal representation in the computer consultation system.

为了探讨知识工程在机械工程中的适用性，我们以流体力学中的基本问题为研究对象，研究了人类解决问题的活动。1986年，我们把流体性质问题作为与时间无关的、不动的、不改变状态的问题来考虑。在这些问题中有三种数据。1：适合于真实的对象的数据，2：关系物理值的方程，3：常识和默契的数据。构造了自动求解器，找到了未知变量到已知变量的路径，并利用产生式系统开发了咨询系统，为流体力学中静态问题的求解提供了参考。该系统模拟了人类根据给定的目标变量求解问题的过程。该系统具有强大的推理控制能力，通过与用户的对话实现求解过程。“1987年，复合问题被包括在内，它由上世界和下世界组成。上界与独立的下界相联系。例如，动量交换规则的上层世界支配着交换前后动量的下层世界。我们开发了对层次知识库进行处理的产生式系统，进而构造了求解组合问题的实用系统。研究了日语中流体力学的组成规则和语义特征。设计了日文输入文本的智能接口，将输入的语句翻译成计算机咨询系统的内部表示。

项目成果

Takashi Watanade: "Solving Mechanism for Elenentury Problems in Fluid Mechanics (1st Reportg; Fluid Property Problem Solver)" Transactions of the Japan Society of Mechanical Engineers, Series B. 53. 3247-3252 (1987)

Takashi Watanade：“流体力学中的紧急问题的求解机制（第 1 次报告；流体特性问题求解器）” 日本机械工程师学会汇刊，系列 B.53.3247-3252 (1987)

渡辺崇: 日本機械学会論文集.

Takashi Watanabe：日本机械工程师学会会议录。

渡辺崇: 日本機械学会論文集, B編. 53. 3247-3252 (1987)

Takashi Watanabe：日本机械工程师学会会议录，B 版 53. 3247-3252 (1987)。