A universal system model about database natural language interface, which separates the programming from Knowledge-Base is constructed.
构造了一个程序设计与知识库相分离的通用的数据库自然语言接口系统模型。
Based on theory of bifurcation and DERPAR numerical algorithm, static bifurcation solution diagram of a two-phase natural circulation system is presented, using homogeneous flow model.
本文基于分岔理论及DERPAR数值算法，运用均相模型计算得出典型沸腾两相自然循环系统的静态分岔解图。
Natural fracture system is a fractal system, and an actual model can be built up by means of fractal theory.
天然裂缝系统是一个分形体系，可用分形理论建立裂缝分布的实际模型。
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