Methods Valid chlorine content measurement method and statistical methods such as standard deviation, and square and root etc in "Technical standard For Disinfection" (2002 version) was adopted.
方法采用《消毒技术规范》(2002年版)有效氯含量测定方法以及标准偏差、方和根等统计学方法。
The method to count standard deviation of indirect measurement value by using rear-average method was proposed.
对用后均法进行测量数据误差分析加以探讨，提出可以用该法计算间接观测值的标准偏差。
The abnormal area delineated by using this method is smaller than that delineated by the standard deviation and isoline methods, characterizing the true anomalous boundary.
利用文中方法圈定出的异常面积比采用标准方差与等值线圈定异常方法小，表征了真正的异常边界。
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