对每项单独的操作，记录其时间，并在测试结束后计算其平均值。
The time is recorded for each individual operation and averaged at the end of the test run.
但因累计资产支出加权平均数的计算过程复杂，手工计算时操作性不强；
But it is very complicated to calculate the weighted average value of accumulated assets expenditure for manual calculation.
本文提出一种确定成品油罐罐壁平均温度的新关系式，它不仅计算准确度高，而且形式简单，便于操作使用。
A new correlation predicts average tank-shell temperature for a diesel oil tank is proposed. This new correlation has the features of high precision, simple in form and easy to calculate.
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