2) weighted phase difference
加权相位差分
1.
Based on the least square estimation model,an improved method of weighted phase difference algorithm is put forward.
从最小二乘估计模型入手,提出了加权相位差分法。
3) compact finite-difference scheme
加权差分格式
1.
Based on compact differencing of fourth-order accuracy for second order derivatives, a simple weighted compact finite-difference scheme with truncation error O[(2θ-1)t,t2+x4] for solving one-dimensional parabolic partial differentlal equation is developed.
利用二阶徽商的四阶精度紧致差分逼近公式,给出解抛物型方程精度为O[1-20)t,t2+x4]的一种新的加权差分格式,并通过Fourier方法讨论格式的稳定性。
2.
Based on compact differencing formula of fourth-order accuracy for second order derivatives,a simple weighted compact finite-difference scheme with truncation o[(1-2θ△t,△t2+△x4)] for solving one-dimensional hyperbolic partial differential equations is developed.
利用一阶微商的四阶精度紧致差分逼近公式,给出了解双曲方程精度为o[(1-2θ△t,△t2+△x4)]的一种新的加权差分格式,并通过Fourier方法讨论格式的稳定性,证明了当0≤θ≤1/2时,格式是无条件稳定的;当1/2≤θ≤1时,格式是不稳定的,最后通过数值试验说明了这种方法的有效性。
4) second-order weighted difference
二阶加权差分
1.
Fast restoration for turbulence-degraded images based on second-order weighted difference;
基于二阶加权差分的湍流退化图像快速复原
5) unweighted analysis of variance
不加权方差分析
6) weighted aberration
加权偏差
1.
When the type, the numbers of the pre-selected parameters, the selected concrete parameters and the site of the coordinates are different, the specific formula of the weighted aberration will change.
当机构类型、预选参数的数目和所选的具体参数以及坐标位置不同时,其加权偏差表达式的具体形式将不同。
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