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发表于 2011-1-23 01:00:30
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There are more than one way to answer this question. The simplest is that, by setting c_s^2 = 1/3,
it eliminates some un-wanted high-order terms. The details of this (linear) analysis are given by
Lallemand and Luo (Phys. Rev. E 61:6546-6562, 2000). |
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