Infinite acting radial flow shows as a flat region whose value is 0.5 on a derivative plot, the same as constant rate type curves.
经过数学处理，二流量压力导数曲线上的无限作用径向流段为一条数值为0.5的水平线，与常流量试井的导数曲线特征相同。
The Numeric Fourier analysis is the basic. We make the EDGE as object. Getting the Edge Spread Function by intergating the histogram of the Edge's image. Then derivative the ESF to get the Line Spread Function. Lastly FFT of the LSF to get the Panoramic Annular lens'Modulation Transfer Function in the direction of tangential and radial. The thesis is composed of seven parts: Foreword.
本论文以数字傅立叶分析法为基础，以刀口物为目标，通过对刀口像的灰度直方图的数字积分得到刀口扩散函数，再对刀口扩散函数进行微分得到线扩散函数，最后通过快速傅立叶变换得到全景成像镜头径向和切向的MTF值，从而得到定量的全景成像镜头的像质评价。
Provide random variable law of asking of derivative of function according to probability definition disappeared to estimate, provide the base function nerve network of the radial during the process of approaching the function, calculation type to each sensitivity of inputting the variable.
依据概率测度收敛的定义给出了随机变量函数的导数的求法，并给出了径向基函数神经网络在逼近函数的过程中，对各个输入变量的敏感性的计算式。
During transition period, the curves of pressure derivative is below 0.5 infinite acting radial flow straight line, assumes a concave shape.
在过渡期，压力导数曲线为数值低于0.5的无限作用径向流水平线，呈现凹字型；
The two flowing segments characterizing finite conductivity horizontal fracture, instable transitional flow in the fracture and radial flow in vertical plane of the reservoir are presented at the particular section of the derivative pressure curve.
从导数曲线上可以看出代表有限导流水平裂缝特征的两个流动段，裂缝的不稳定流动过渡段和地层内的垂直径向流动段。
The coupling magnetic field model in which the electromagnet torque and radial suspension force interfere each other is linearized through inverse system decoupling, and pseudo-derivative feedback control strategy is used to research the decoupling linearization system.
就无轴承电动机产生旋转与悬浮相互干扰的耦合磁场模型进行了逆系统解耦线性化，并对无轴承电动机的解耦线性化系统进行了伪微分反馈（pseudo-derivativefeedback，PDF）控制研究。