第四章，对数导数与拟共形延拓。
Chapter IV: Logarithmic derivative and quasiconformal extension.
本文得到了EHS (C)中函数妁对数导数的积分平均估计及一类系数泛函数估值。
In this paper we obtain integral mean bounds of logarithmic derivatives and estimates of coefficient functionals for functions in EHS (c).
在左截断右删失数据下，我们基于乘积限估计给出了分位密度估计，获得了分位密度估计及其导数的重对数律。
In this paper laws of the iterated logarithm for quantile density estimator and its derivative estimators are established when data are subject to left-truncated and right-censored observations.
用几个典型例题，论述了用变形方法在指数、对数、三解等函数求解导数方面的作用。
This paper expounds the role of transformation in exponential, logarithmic and trigonometric functions based on some examples.
对于存在定压边界煤层气藏，压力双对数曲线的晚期是水平直线段，压力导数双对数曲线的晚期都是急剧下掉的曲线。
As for the coal-bed gas reservoirs with constant pressure boundary, the log-log pressure curves are horizontal lines and the log-log pressure derivative curves are falling rapidly in the late stage.
绘制出了溶洞压力导数半对数曲线和井底压力双对数曲线。
According to the semi-logarithmic curve, pressure derivative curves of vugs initially increase and then decrease;
绘制出了溶洞压力导数半对数曲线和井底压力双对数曲线。
According to the semi-logarithmic curve, pressure derivative curves of vugs initially increase and then decrease;
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