The realization of function modeling in virtual machining

A structure of function model of mapping is proposed in paper on the basic of analyzing the function course, function relation and function structure of virtual machining environment, and this model structure is described by function units and function features. Function units are used to describe the function entity of mappings and function features are used to describe the relations among the function units. The data structure and expression of the function unit, the mechanism analysis and expression of the function feature are also introduced in the paper.