基于知识的工程关联数据库系统

M.A. Moss , K. Jambunathan , E. Lai
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引用次数: 4

摘要

工程设计经常依赖于以无量纲相关性形式表示的经验数据。这些几乎总是受到适用性限制的制约,工程师面临着从大量可用的数据中选择正确的相关性以提供可接受的精度的设计数据的问题。构建了一个基于知识的数据库系统(KBDS),该系统有助于简化射流冲击应用程序的制定,并在此基础上从数据库中检索和评估相关相关性。如果数据库中的信息不满足此规范,系统将使用应用程序领域的知识来选择合适的相关性进行外推,或者修改数据库查询以选择替代信息。描述了能够添加新的相关性或扩展网络中的知识以包括新的几何形状和流动条件的约束,同时保持完整性。KBDS的运行已经被证明与一个综合的相关数据库的传热由于单一和多个空气射流的冲击。该应用程序提供了典型的工程相关性,因此所描述的技术有望得到广泛应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A knowledge based database system for engineering correlations

Engineering design frequently relies on empirical data expressed in the form of non-dimensional correlations. These are almost always governed by applicability limits and the engineer is faced with the problem of choosing the right correlation that would provide design data with acceptable accuracy from a large number which are available. A knowledge based database system (KBDS) has been constructed which assists in the simple formulation of a jet impingement application based on which it retrieves and evaluates the relevant correlation from a database. Where the information in the database does not satisfy this specification the system uses knowledge of the application domain to either select suitable correlations for extrapolation or to modify the database query to select alternative information. The constraints which enable new correlations to be added or the knowledge in the network to be extended to include new geometries and flow conditions whilst maintaining the integrity are described. The operation of the KBDS has been demonstrated with a comprehensive database of correlations for the heat transfer due to the impingement of single and multiple air jets. This application provides typical engineering correlations and hence the techniques described are expected to be widely applicable.

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