The existed research shows that the checkerboard phenomenon is caused by the analytical error of finite element.
已有的研究表明，棋盘格现象是有限元分析误差所致。
Finally, to reduce the analytical error of finite element, with the error estimating method for FEM, the error of new mesh elements are estimated and the elements with large error are refined.
最后，采用有限元误差估计方法对新网格单元的计算误差进行估计，对误差较大的单元进行加密，减少了有限元分析误差。
In local chemical exploration, the variance analysis of three-stage-model must be applied to estimate analytical uncertainly and sample-collecting error.
在区域化探中必须应用三层套合方差分析对样品的采样误差和分析误差进行统计分析。
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