Chapter 3 is centered around the existence of periodical solutions for non self-adjoint nonlinear second order difference equations by invoking matrix theory and coincide degree theory.
第三章利用矩阵理论与重合度理论，讨论了一类非自共轭非线性二阶差分方程周期解的存在性问题。
A new entropy dissipator, based on the second-order difference of the numerical solution is given.
并且给出了一个新的以数值解的二阶差分作为基本模块的熵耗散函数。
This paper mainly researches the usage of high order difference scheme on the traffic flow modeling.
本论文主要研究高阶差分格式在交通流模型上的应用。
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。
The predicting of the new searching center by the application of a 3-order difference formula speeds up the calculation further.
应用三阶差商公式预估新的搜索中心，使运算速度得以进一步提高。
The first order difference of likelihood variable may be used to locate data points in other probability distributions and to improve deconvolution result then.
似然变量的一阶差分，可以用于检测来自其它概率分布的数据点的位置，改善反褶积的效果。
Numerical experiments show that the new method is better than some other high-order difference methods given before, and applicable for advection-dominated problem.
数值算例表明本文方法优于以往的几种高精度差分格式，且适用于对流占优问题。
According to the second-order difference of the consecutive pixels, the source pixel group is automatically selected to compute the corresponding target pixel gray value.
该算法以相邻像素的二阶差分为基础，自动选择与目标像素点相对应的源像素组进行插值运算。
Some new criteria of oscillation or non-oscillation are presented for certain nonlinear second order difference equations. Several examples are given to illustrate the results.
对一类二阶非线性差分方程的解给出了几个振动或非振动的判定定理，并举例说明了定理的应用。
According to structural feature of typical geologic models in Shengli oilfield, the paper presented staggering mesh high-order difference forward simulation of density-variated acoustic equation.
根据胜利油田典型地质模型的构造特点，本文提出了变密度声波方程交错网格高阶差分正演方法。
Then for higher order chaotic discrete-time system, the approach discussed can be degraded to one order difference equation. As a result, chaotic discrete-time system can be easily solved by Matlab.
对于高阶离散混沌系统也可以采用上面的变换将系统降阶，变成一阶差分方程组进行求解，从而离散混沌系统都可以通过简单的编程实现数值仿真。
It is theoretically shown that the application of high-order difference method in structure and velocity images decreases frequency dispersion error, but improves effect and accuracy of computation...
理论分析表明，在构造与波速成像中采用高阶差分方法，可以减小频散误差、提高计算效率与计算精度、获得满意的效果。
It is theoretically shown that the application of high-order difference method in structure and velocity images decreases frequency dispersion error, but improves effect and accuracy of computation...
理论分析表明，在构造与波速成像中采用高阶差分方法，可以减小频散误差、提高计算效率与计算精度、获得满意的效果。
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