半对数坐标系一个轴是分度均匀的普通坐标轴,另一个轴是分度不均匀的对数坐标轴。该图中的横坐标轴(x轴)是对数坐标。在此轴上,某点与原点的实际距离为该点对应数的对数值,但是在该点标出的值是真数。为了说明作图的原理,作一条平行于横坐标轴的对数数值线。对数坐标系两个轴(x和y)都是对数标度的坐标轴,即每个轴的标度都是按上面所述的原则作成的。
注水开发油田累计产水量和累计产油量存在一定的相关性,在半对数坐标上呈近似直线关系。
There is a correlation between accumulated water production rate and accumulated oil production rate, which is a linear relation on semilog coordinate.
累积塑性应变能随着加载频率及应力水平的增加而增加,与疲劳寿命在半对数坐标下呈线性关系。
The cumulative plastic strain energy increases with the increase of the loading frequency and stress level, which is linear with fatigue life on semilog coordinate.
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