浅析“四舍六入,五看奇偶”在水文的运用

Application of Rounding Method in Hydrologic Data Processing

日常生产生活中,通常采用"四舍五入"的方法,对数字进行有效数字的修约,本文详细介绍了水文行业中的数字修约规则——"四舍六入,五看奇偶"。文中说明了需采用"四舍六入,五看奇偶"的原因,水文资料整编规范对"四舍六入,五看奇偶"的要求和具体修约方法。通过实例,与传统的"四舍五入"方法相比,借助计算机程序,分析"四舍六入,五看奇偶"科学性、合理性以及不足,对其不足进行了适当改进,使之在水文的应用中更为合理、更为适用。

In our daily life and production, numerical values are usually rounded off with the ＂rounding＂ method. This paper introduces regulations of the data processing with the method of ＂round-to-even, look at the five odd or even＂. This paper also introduces the reason why this method is used, and explains the requirements and the specific methods in hydrologic data processing. By using computer program, its scientificity, rationality and shortcoming have been analyzed, some improvements in comparing to the concept of numerical rounding have been done in order to make it more reasonable and applicable in hydrology.