Purpose: To compare gated myocardial perfusion tomography (GMPT), gated blood pool imaging (GBPI) and ultrasound cardiography (UCG) in left ventricular ejection fraction (LVEF) calculation.

目的：探讨门控心肌灌注断层显像（GMPT）、平衡法心血池显像（GBPI）与心动超声（UCG）测定左室射血分数（LVEF）的差别。

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Based on the simulation results, a calculation formula of ITZ volume fraction is given.

基于这些模拟结果，给出了界面体积百分比的计算公式。

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A calculation of the properties of the solid fraction of a rock from the combination of two logs.

用两种测井曲线组合起来确定岩石固体部分百分数含量的计算值。

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But because the problem affects only a tiny fraction of the flying population, we didn't include the category in our calculation.

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