A kind of optimization containing step function in coefficient is studied in this paper.

研究了一类系统含阶梯函数的优化问题.

The solution for optimization based on other cases of step function is also discussed.

文中针对阶梯函数会出现的特殊情形进行了讨论。

The Heaviside step function is used in signal processing.

海维赛德阶跃函数用于信号处理。

Toon Shading: Using a step function to define visible colors (usually 3-5 colors).

阴影：使用步进函数定义可见色（通常3-5种颜色）。

Then the new step function space is introduced and stability problem for the finite difference scheme is discussed by means of variational approximation method.

然后引入新的步长函数空间，并在这个空间上，采用变分近似法讨论该格式的稳定性问题。