Based on the physical meaning of ratio V/F (V, F denote respectively the volume and the surface of work piece), this paper suggests the conceptions of equivalent thickness D' and equivalent coefficient β. There exists the relation βD'= D, where D is the effective thickness, thus acquiring the formula of heating time for zero holding time technology τ=αD'.
Based on a great many experiments and comparisons we found a fast testing method for evaluating cycle life of EV batteries,which is corresponding to the requirement prescribed in domestic standards DB 31/202-1997 and JB /10262.The testing method and equivalent coefficient are also presented.
Computing the certainty equivalent coefficient by risk rate returns and minimum rate of none-risk returns is, in fact, the method to calculate risk-adjusted discount rate. It is a theoretical mistake to analyze the investment risk this way.
Also, with balance of cultivated land economic productivity as the basis, the article brought forward a calculation method of the equivalent coefficient of cultivated land requisition-compensation balance according to the economic income of the unit area land.
The authors deduce the equivalent coefficient formula of the wall pressure by using the principle of soil mechanics and considering the effect of the wall pressure caused by gravity on the absolute rotating speed.