finite difference approximation meaning in Chinese
有限差分逼近值
有限差分近似
Examples
- A stable finite difference approximation for vibration equation of beams
梁振动方程的一个稳定的有限差分近似 - ( 5 ) discuss some mathematical models of the pollutant transport problems in some local river flow fields . by integral transform method , the paper establishes the usual finite difference approximation scheme to solve the numerical solutions and gives examples for the computation of the approximating solutions , moreover , discusses one - dimensional characteristic finite difference method for a convection - diffusion equation under usual conditions
( 5 )针对水域中污染物输移问题的数学模型，通过积分变换法，得到了简化模型在理想化条件下的近似精确解，同时给出数值算例，并且对非理想化条件下模型的特征差分方法进行了讨论。 - It is proposed on the basis of the analysis on newton method and the preconditioned conjugate gradient method ( pcg method ) . numerical derivatives can be evaluated by symbolic differ - entiation ( sd ) , finite difference approximation and automatic differelltiation ( ad ) . ad has significant advantages over other two approaches
自动微分是一种新的能精确而有效地计算导数的方法，它优越于传统的微分方法，例如它比符号微分和差分方法的计算成本低，又比差分方法计算精确，自动微分在近几年发展迅速，应用广泛。