The letter "C" in the first equation refer to "Contribution". It means the differenCe between sales revenue and variable Costs.
第一个等式中的“C”是指边际贡献，它是指销售收入和变动成本之间的差额。
At first we can get the Lagrangian function from the elliptic equation, then replace differential coefficient by difference and get the discrete Lagrangian function.
给定一个椭圆方程，我们先找出这个方程的拉氏函数，用差分代替微分，得到离散的拉氏函数。
In this paper, an implicit-explicit upwind difference scheme for the first order linear hyperbolic equation is proposed using explicit scheme and implicit scheme alternately.
本文采用显格式与隐格式交替使用的方法，针对一阶线性双曲方程提出了一种隐-显迎风差分格式。
First, the general form of input-output equation has been given and a input-output difference equation corresponds to a class of canonical form has been obtained.
首先给出了输入输出方程的一般形式，并对于一类规范型给出了相应地输入输出差分方程。
First, the general form of input-output equation has been given and a input-output difference equation corresponds to a class of canonical form has been obtained.
首先给出了输入输出方程的一般形式，并对于一类规范型给出了相应地输入输出差分方程。
应用推荐