difference quotient

基本解释

The difference quotient interpolation is also used to improve the accuracy of the interpolation calculation, which shows satisfied quality of synthesized speech.
为了提高计算精度，在频谱的插值计算中还引入了差商型插值方法。
On the basis of Newton method, Secant Method used the difference quotient instead of calculating the value of derivative. his thesis derives improvements of Newton method.
弦截法在牛顿法的基础上，利用差商来回避导数值的计算。本文推导了牛顿迭代法的各种改进方法。
A hybrid algorithm for topology optimization of trusses with discrete variables is developed which combines relative difference quotient algorithm with chaos optimization.
将相对差商法和混沌优化结合起来，形成求解离散变量桁架结构拓扑优化设计的混合算法。

差商
One item of the P-M model is omitted in the P-M’s discrete scheme, and the gradient magnitude is replaced by the absolute value of difference quotient.
Perona-Malik给出的离散格式是一种显式离散格式,这一格式的连续形式省略了原模型中的一项,且用差商的绝对值代替了梯度模。
数学
差商
差分商
均差