backward difference [数] 后向差分 ; [数] 反向差分 ; 后差分 ; 后差
backward difference operator [数] 后向差分算子 ; [数] 向后差分算子 ; 反向差分运算子
backward difference method [数] 后向差分法 ; 退差分法 ; 反向差分法
backward difference approximation 后向差分近似法
backward difference implicit 后向差分隐式法
backward difference quotient 后向差商
Backward difference function 倒差分函数
backward difference equation 后向差分方程
second order backward difference 二阶向后差分格式
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Given the stability, error estimate and numerical experiments for the nonlinear equation of second order backward difference(4)Given the weighted of second order convolution quadrature.
给出非线性方程的二阶向后差分格式稳定性、误差估计。 （4）给出二阶卷积积分的权重。
By using backward difference of space-time intensity correlation function with respect to time delay, the two-dimensional velocity vector of a moving diffuser can be measured.
利用远场时变散斑空-时强度相关函致的有限差商可以测量散射体运动的二维速度矢量。
This paper compares the difference between science and technology, and analyses the reason why China is backward in terms of science and technology.
比较了科学与技术之间的区别，并在此基础上，分析了中国古代科技领先近代科技落后的原因。
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