elementary equation meaning in Chinese

基本方程式

By using the present accomplishment , the elementary equations are turned into model equations on which the numerical model is based . 3 . the finite volume method is used to disperse the differential equations
利用现有的研究成果，把推导出的基本方程化为了模型方程(即基本方程的模化) ，并以其作为建立数学模型的基础。
The paper begins with the reclaiming and using of the remaining heat during the process of yielding the oil and in the electricity plant to study the application of heat pump ' s technology in the oil field and electricity plant . this paper introduces the development and classification of the heat pump , the elementary principle , evaluable target and the p - h chart of the mechanism compressive heat pump ; it points out the necessity to design the computer program of refrigeration medium ' s thermal character , offers the elementary equation , calculating formula , calculating method and the program frame to calculate the refrigeration medium ' s thermal character
本文介绍了热泵的发展、分类，机械压缩式热泵的基本原理、评价指标及常用的p - h图；指出了设计制冷剂的热力性质计算机程序的必要性，给出计算制冷剂热力性质的基本方程、计算公式、计算方法及程序框图，编制了9种常用制冷剂性能参数计算程序，可直接用于热泵系统cop及per值的计算。