1) second order difference method
二阶差分法
1.
By second order difference method processing of the resistivity depth sounding data on the Jiaojia type fracture zone alteration rock pattern gold deposit, the top interface of the deep fracture zone alteration-mineralization belt can be clearly identified and the top interface burying depth can be calculated by the 0- line feature of ρ_α~m section map.
焦家式破碎带蚀变岩型金矿床上的电阻率测深资料经二阶差分法处理后,可以明显识别深部断裂构造蚀变矿化带的顶界面,并可利用ραm断面图的0-线特征求取其顶界面埋深。
2) Twi-differential algorithm
二阶差分算法
3) Difference in Difference Approach
二阶差分方法
4) second difference
二阶差分
1.
Phase unwrapping algorithm based on minimum second difference;
基于最小二阶差分的相展开方法
2.
Weighted minimum cost flow phase unwrapping algorithm based on second difference;
基于二阶差分的加权最小费用流相位展开算法
5) method of first order difference
一阶差分法
1.
Being directed against the strange signals in feed forward AGC in Benxi Iron and Steel Company, this paper applies the method of first order difference to forecast the change of signals, and thenpretreats them.
针对本钢热连轧前馈ＡＧＣ中采样信号出现的奇异项，本文采用一阶差分法来预测信号变化，进而对奇异信号进行预处理。
6) high-order difference method
高阶差分法
1.
The high-order difference method of wave equation has the advantages of high accuracy and small numerical dispersion.
波动方程高阶差分法具有精度高、数值频散小的优点 。
补充资料：对称差分(n阶的)
对称差分(n阶的)
symmetric difference of order
对称差分(n阶的)l另11111州tric山ffer曰℃eof份der‘c“MMe邓一，ecK即pa3Hoc几“op，皿Kan」，一元实变函数f在点x上的 表达式 声/n、，.、。，/.n一Zk八 △口ffx，h)=)l:’1(一1)“f lx十二二~一竺二生h 1. 一‘““一””k饥戈k/、‘产“戈一2‘’/‘将h换成Zh，下面的表达式也称为对称差分: 息川(一1)*，‘二+、。一2、)。).假若f(x)在x有n阶导数厂时(x)，那么 △二f(x，h)=./戈n)(x)h”+o(h”). T .fl .J’IyKame皿。撰
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参考词条