フレームデータモデルに基づく機械材料データベースにおけるデータの検索

抄録

From database consisting of a set of frame-represented material data, data retrieval is made by determining data objects which are subsumed by the object that is also a frame-representation of a query. The discrimination of data can be successfully made down to every detail of data objects such as, for example, the order of successively given thermo-mechanical treatments, their temperatures, and the dimensions of test specimens. Nevertheless, the fact that expected slot values are often missing in original report on the results of material testings impairs the completeness of data retrieval. This problem is coped with through the use of default reasoning, so that to prepare a set of appropriate default rules is an important task to render the database system more useful.