The finite cluster approximation method is conceptually as simple as an ordinary mean field approximation, but gives much better results.
有限集田近似方法与平均场近似相比，在数学上处理同样简单，但可给出更好的结果。
In the mean field approximation, the steady state equation is given, and the linear stability analysis of the steady states is performed.
在平均场近似下给出了定态方程，分析了定态线性稳定性。
The effect of diagonal disorder on the upper critical field of the local electron pair system is studied in the framework of the mean field approximation.
本文应用平均场近似讨论了对角无序对局域电子配对系统的上临界磁场的影响。
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