Derivation of formula的意思|示意

The formula of reliability index is calculated in the origin space directly, so derivation and orthogonal transformation are avoided.

所用的可靠度计算公式直接在基本变量空间中求解，避免了繁琐的求偏导数和正交变换工作。

From the system efficiency formula derivation, the influential factors of system efficiency were considered.

本文从系统效率公式推导，分析了影响系统效率的主要因素。

The corresponding mathematic model has been established in accordance with the physical definition of the density and the expansion coefficient through formula derivation.

根据密度和膨胀系数的物理定义，通过公式推导，建立了相应的数学模型。

The improved formula not only has the more simple form for the derivation of the function, but also much less computer time than the Lagrange method.

与常用的拉格朗日插值方法相比，改进后的公式不仅一阶导数形式简单，而且计算量也小得多。

Through derivation the general formula is obtained, which reflects the flow dynamic factors, the characteristics of river-bed geometry and boundary.

经推导，得到了反映水流动力因素、河床几何尺寸和边界特征的河床稳定性综合指标一般表达式。

Through theoretical analysis and derivation, a formula for calculating active power economic distribution among any number of hydro and thermal power units was obtained under ignoring system losses.

通过理论分析和推导，得出一组在不计网损下，任意多个水、火电厂之间有功功率经济分配的计算公式。