A fairly unbiased evaluation of irregularly distributed data is obtained by the mathimatical method of trend analysis. 受到意外干扰的数据可以用趋势分析数学方法进行比较公正的评价。
Based on information of abnormal gas zones, a trend surface method is used to simulate gas distributing rule in the paper. 本文在分析瓦斯异常带成因的基础上，采用趋势分析方法，用趋势面来模拟瓦斯带的分布规律，设定趋势分析剩余值的阈值即可以划定出瓦斯异常带。
