backward difference
英 [ˈbækwəd ˈdɪfrəns]
美 [ˈbækwərd ˈdɪfrəns]
网络 后向差分; 后差分; 差分法; 向后差分; 後向差分
双语例句
- In a backward and terribly overcrowded country such as china, where a plot of land often means the difference between life and death, these figures are of far greater significance than they would be in a land-rich country such as the United states.
在中国这样落后而人口极为稠密的国家里，有没有土地往往决定生死命运，因此这些数字的意义比起在美国这样土地甚多的国家里要大得多。 - The backward switching time of the two compositions varies from 1 μ s to 12 μ s. The difference of the time is related to the backward electric field and the size of the sample.
材料的反向开关时间为1~12μs，开关时间随反向相变电场的升高而减小，且与样品的尺寸有关。 - Comparison of Several Backward Characteristic Difference Schemes for Pure Convective Equations
解纯对流方程几种向后特征差分格式的比较 - Presents a kind of test equipment on temperature and pressure based on DSP. Adopting a successive backward sectional Newton divided difference interpolation mathematics model proposed by author, this equipments make the test for temperature, pressure digitalization, high precision and visualization.
设计了一种基于DSP的温度、压力测试装置，采用提出的一种改进的向后逐次分段的牛顿均差插值法，实现了对温度、压力进行实时测试的数字化、高精度和直观化。 - First, it calculates the luminance difference between the forward field and the backward field, i.e., the luminance difference between two successive odd fields ( or two successive even fields).
该算法首先计算相隔一场的两个电视场亮度信号之间的差值，即相邻的两个奇场（或偶场）亮度信号之间的隔场差。 - A class of generalized backward difference method for solving stiff ordinary differential equation containing parameters
求解Stiff常微分方程具有参数的一类广义向后差分方法 - The disadvantage of backward difference scheme in resolving the two order constant differential equation is presented;
在求解二阶常微分方程时，分析了后向差分格式离散时间步的弱点； - There are three difference formats in this thesis. They are backward difference, Crank-Nicolson's difference and Galerkin's difference.
本文对时间域采用的离散格式有两点向后差分、Crank-Nicolson格式差分和Galerkin差分等。 - A new method for establishing the Z domain equivalent model of a non-ideal op amp is presented. The Z domain transfer functions of non-ideal integrators based on the forward difference and the backward difference transformations are derived as two examples.
本文提出了建立非理想运放等效Z模型的新方法，并以前差及后差映射积分器为例导出了非理想积分器的Z传递函数。 - In this paper, the forward, backward and intermediate difference formulae of the function F ( x, y) are given.
本文给出了函数f（x，y）由已知点构违的向前、中间和向后变换差分公式。 - 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。 - Secondly, the discretization pattern is obtained for the determining solution problem mentioned above, through using the backward difference method to time variable and the finite volume method to space variables in an annular sloving domain which is used for actual computation.
其二在环形求解区域内，对上述定解问题中的时间变量使用向后差分法、空间变量使用有限体积法进行离散化得到相应离散化格式，并将其应用于实例计算中； - TVD sufficient condition for implicit scheme of second order accurate backward time difference
2阶精度时间后差隐式格式TVD充分条件 - Switched-Capacitor RLC Simulation Circuits Based on Backward Difference Transformation
后差变换开关电容RLC仿真电路 - An example, a model rotor system, is numerically analyzed by above mentioned theoretical solution and three general numerical integration methods the Euler backward difference method, Newmark method and Houbolt method.
用本文提出的理论解方法及三种常用的数值积分法：尤拉后差法，纽马克法，及呼伯特法，对一模型转子算例进行了分析计算，结果表明； - In the paper, the backward algorithm in the scalar case is generalized to the vector case, and a recurrence relation for the difference between two consecutive convergents of vector continued fractions is obtained.
文章首先把数量情形下的向后递推算法推广到向量情形，建立了向量值连分式两相邻渐进分式的一个递推关系式。 - 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。 - Describe the pressure variation of node in grid with bilinear interpolating function. These equations are dispersed in time by using backward difference method.
用双线性函数描述网格结点的压力变化，在时间上用向后差分法进行离散。 - The differential quadrature method ( DQM) and the second-order backward difference scheme are used to analyze the dynamic characteristics of the fluid-saturated elastic or visco-elastic porous soil. Comparison with the analytical results points out that they are agreement.
推广微分求积方法于两相不可压流体饱和多孔介质并结合二阶向后差分格式，研究了固相为弹性、粘弹性材料的流体饱和土的动力学特性，并与现有解析结果相一致。 - Based on detection of the disturbance signal envelope, the approach is implemented by using backward difference to detect signals distortion point.
该方法在提取暂态电能质量扰动信号的包络的基础上，利用向后差分方法实时检测信号的畸变点来进行定位。 - A fast transient power quality disturbances localization approach is presented by using Hilbert transform combined with backward difference.
主要研究成果如下：1.提出一种结合Hilberr变换和向后差分的暂态电能质量扰动快速定位方法。 - Lanzhou locates in northern China which is poor and backward, so under the circumstances of the shortage of total amount of educational investment in China, there is a huge difference in educational investment inside in Lanzhou.
兰州市位于西部落后地区，义务教育投入在总量不足的情况下，其内部义务教育经费的投入也存在着较大的差异。 - Numerical simulations have been done with the backward Kolmogorov equation for reliability function and the generalized Pontryagin equation for conditional moment of the first-passage time which is under control by using finite difference method.
并采用有限差分法对受控系统的可靠性函数、首次穿越损坏的概率密度函数所满足的偏微分方程进行了数值仿真。 - The results showed that the level of development of modern agriculture in the region was relatively backward, and around the city development were difference. 3.
得出了全区现代农业发展水平较为落后，各地市发展差异较大的结论。