- 1. The perturbational finite difference method (PFD) is a new method of constructing high accurate difference scheme.
- 摄动有限差分（PFD）方法是构造高精度差分格式的一种新方法。
来自互联网
- 2. The perturbational finite difference method (PFD) is a new method of constructing high accurate difference scheme.
- 摄动有限差分（PFD）方法是构造高精度差分格式的一种新方法。
来自互联网
