The finite cluster approximation method is conceptually as simple as an ordinary meanfieldapproximation, 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。
2
In the meanfieldapproximation, 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。
3
The effect of diagonal disorder on the upper critical field of the local electron pair system is studied in the framework of the meanfieldapproximation.