The five-grid difference format of Helmholtz equation in slanting coordinate have been derived.

推导出斜坐标系下，亥姆霍兹方程的五点差分格式；

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In the later model, the advection was treated with "windward" difference format to avoid occurrence of negative concentration.

在污染扩散模型中还对平流项作“迎风”差分格式处理以避免出现浓度负值。

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The seven-grid difference format and nine-grid difference format of Helmholtz equation in right coordinate in the way of Taylor series method have been derived.

用泰勒级数法推出直角坐标系下亥姆霍兹方程的七点差分格式和九点差分格式；

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The difference is that in a format war the more people who bet on a format actually leads to that format winning.

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The difference is that the penalty paid in the single match format is not nearly as significant as the one paid in the two-legged format.

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But the format alone is unlikely to make that great a difference.

CNN: Analysis: No change in presidential race after debate