The accuracy and the existent problem of forward difference method are analyzed on the basis of comparing the transfer function of recursive formula with theoretical transfer function.

本文把四种方法统一写成递归格式，从理论上研究其共性特征，然后从递归公式所构造的数字滤波器的传递函数与理论传递函数比较的角度进行了分析。

youdao

We focus our attention on how to process image with difference and bring forward a method analyzing the movement properties of the myocardial cells image sequences by the means of improving it.

在此基础上介绍了如何用减影法进行图像处理，并对它进行改进提出了检测心肌细胞序列图像运动特征的一种方法。

youdao

A high order finite difference forward modelling method was proposed to improve its efficiency.

为了提高其效率，提出了一种高阶差分正演模拟方法。

youdao