数据库系统中的参数获取

COEFICIENTS ACQUISITION IN DATABASE SYSTEM

介绍作者在KESHELL II系统中设计的一个参数处理模块CP.该模块以回归、拟合等手段实现从目标数据库中获取数值型属性之间的函数表达式,它也允许DBA以显式函数关系来描述数值型“虚”属性.

This paper introduces the ooefioients acquisition and processing module (C P) in the KESHELL II system. The regression, fitting and other mathematical methods are adopted to acquire the function expression of numeric attributes from the object database. The DBA can describe the virtual numeric attributes in explicit functions by the OP module.