然后，采用分离变量法和特征函数展开法在相应的边界条件下求出级数解。

Secondly, the method of separation of variables and the eigensolution expansion method are used to obtain the analytical solutions of thick plates under corresponding boundary conditions.

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相应地，用R型因子分析法、单变量因子克立格法和多标度分形谱便能有效地实现地球化学场的分解。

And so, the methods of R-mode factor analysis, single-variate factor Krig-ing and multifractals are used in the present paper, to disperse the compounding geochemical field.

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