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。

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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。

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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。

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What difference would it make had Frost, as he could have, I suppose, reversed the order of lines 13 and 14?

如果把13行与14行颠倒之后，会发生什么呢？

耶鲁公开课 - 现代诗歌课程节选

The much-perused lists each represent "an order of magnitude" difference in sales, says Yardley.

FORBES: iLike iPhones

We have long moved past the stage of pure idealism and are increasingly engaging all sectors of society and government in order to make a difference on the ground.

FORBES: The Future of Life On Earth: A Two-Part Discussion

The researchers do not know if this is because the patch needs to be in place during early development in order to make a difference or if the patch struggles to make it into the inner ear beyond a certain point.

BBC: Genetic patch 'stops deafness' in newborn mice