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。
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。
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。
The property data of crude oil and its fraction is the basic data in design of petroleum refining technology. In the past these data were obtained by hand calculation or consulting tables and charts.
石油及其馏分的物性数据是石油炼制工艺设计的基础数据，以往常常采用手工计算或查阅有关图表获得。
Any fraction of the boundary that borders a water body is excluded from the calculation.
计算中不考虑任何与水体接壤的边界部分。
From the perspective of the use of solar energy, the article analyzed principles of solar heating system and calculation method of the best solar fraction.
本文从太阳能利用的角度出发，分析了太阳能采暖系统的原理以及最佳太阳能保证率的计算方法。
The results show that the absorption fraction of the semiconductor slab of the switch increases the delay time of switches and should be considered in the calculation.
结果表明开关的半导体片对照射激光的吸收因子增大了开关的延迟时间，在计算中应该加以考虑。
The Day Count Fraction is used to determine the number of days in the Calculation Period for which a Fixed Amount is payable.
日计数分数是用来确定一个固定数额支付的计算期间的天数。
The calculation of the void fraction in subcooled boiling is different from that in saturated boiling, it is characterized thermal in equilibrium.
欠热沸腾下的空泡份额计算不同于饱和沸腾，具有热不平衡特点。
The definition of the void fraction and the calculation formula for the void fraction determining were given.
给出了孔隙率的定义和确定孔隙率的方法。
The calculation of every fractions in Separating fraction and integral of rational proper fraction is reduced by the method.
从而大大简化了分式分项的计算，简化了有理真分式的积分运算。
Under the ordinary exciting signal, this method of calculation is just in the same form as that for inverse Laplace transformation of rational fraction by partial fraction expansion.
当激励信号是常见信号时，本文提出的方法与求有理分式的拉氏反变换的部分分式展开法在形式上完全相同。
Three kinds of new methods used for detecting fiber volume fraction of 3D woven composite were introduced, such as weighing method, theory model calculation method, digital image analysis method.
文中阐述了适用于三维机织复合材料纤维体积含量测定的3种新方法：称量法、理论模型法、数字图像分析法。
Three kinds of new methods used for detecting fiber volume fraction of 3D woven composite were introduced, such as weighing method, theory model calculation method, digital image analysis method.
文中阐述了适用于三维机织复合材料纤维体积含量测定的3种新方法：称量法、理论模型法、数字图像分析法。
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