The porosity and permeability of matrix, and the width, density and direction parameters of fractures were obtained by core analysis, well logging, seism and thin section observation methods.
利用岩心分析、测井、地震、薄片分析等静态描述手段测试并计算了基质的孔隙度和渗透率，得到裂缝的宽度、密度和方位等参数。
When polymer relative molecular mass and its distribution width are the same, the polymer displacement efficiency increases with the increment of the core permeability variation factor.
当聚合物的相对分子质量及其分布宽度相同时，随着岩心渗透率变异因数的增大，其聚合物驱采收率也随之增加。
The generating and controll of Sinusoidal Pulse-Width Modulation (SPWM) waveforms is one of the core technology of frequency conversion.
而SPWM（正弦波脉宽调制）波的产生和控制则是变频技术的核心之一。
Some parameters, such as the core width, pitch of adjacent waveguides, diffraction order, number of arrayed waveguides, and propagating wavelength are optimized for the purpose of actual design.
并对波导芯尺寸、相邻阵列波导间距、衍射级数、阵列波导数等参量进行了优化，得到了器件实际设计所需要的相应的参数值，从而达到优化器件设计的目的。
Some parameters, such as the core width, pitch of adjacent waveguides, diffraction order, number of arrayed waveguides, and propagating wavelength are optimized for the purpose of actual design.
并对波导芯尺寸、相邻阵列波导间距、衍射级数、阵列波导数等参量进行了优化，得到了器件实际设计所需要的相应的参数值，从而达到优化器件设计的目的。
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