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“硬干不如巧干,图表代替计算”,在工程计算技术中,为了减轻繁重的数字计算工作,常将所援用的公式转化为图表。查图表就比计算要快得不知多少倍,譬如有时一年的计算工作量,而用图算却只要几夭。为了多快好省地完成我们许多日常工程计算工作,这里介绍一种直坐标的图算法,作为大家的参考。这种图算法,作图简便,易于掌握,不象对数贯线图要刻划坐标,查图时也不需要用直尺划贯线。这还不算,最大的优点是复杂的公式也能毫不困难地作出图来。本方法实用的意义较宽,凡工程计算工作中,包括水利工程,水丈及其他工程计算,凡引用公式进行计算者,都可应用。
“Hard work is better than work, charts instead of calculations.” In engineering calculations, formulas that are invoked are often transformed into charts to ease the heavy numerical calculations. Look up charts faster than the calculation do not know how many times, for example, sometimes a year’s calculation workload, but only a few months to use the map count. In order to accomplish many of our daily engineering calculations more quickly and economically, here’s a straight-ahead graph algorithm, as a reference for everyone. This kind of graph algorithm, drawing simple, easy to grasp, not like the logarithmic cross-line graph to draw coordinates, check chart also do not need to use straight ruler line. This is not the case, the biggest advantage is that complex formulas can be made without difficulty. The practical significance of this method is wider, where the engineering calculation work, including water conservancy project, Shuizhang and other engineering calculations, who cited the formula for calculation, can be applied.