...期 动脉 血流动力学参数 正常组 血流灌注 相关关系 【分类号】: R740 【正文快照】: 血管阻力指数(resistance index,R I)是超声学利用脉冲多普勒测得血流频谱收缩末峰值流速与舒张末峰值流速之差除以收缩末峰值流速的比值[1]。
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...期 动脉 血流动力学参数 正常组 血流灌注 相关关系 【分类号】: R740 【正文快照】: 血管阻力指数(resistance index,R I)是超声学利用脉冲多普勒测得血流频谱收缩末峰值流速与舒张末峰值流速之差除以收缩末峰值流速的比值[1]。
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以上来源于: WordNet
ABBREVIATION for Royal Institution 皇家研究所
r I can take a rod with a radius r, which is 0.5 centimeters.
假设一根棒子半径,等于0。5厘米。
R If you already have an r, I mean, there's not much risk for confusion, but still.
如果你已经用了字母,虽然混淆的危险不大,但还是可能的。
The special M. R. I. technique, known as diffusion tensor imaging, is also being studied to help improve the diagnosis of concussions.
这种特殊形式的核磁共振成像技术被称为弥散张量成像,对这种技术的也用来提高诊断脑震荡的精确度。
The American Food and Drug Administration says R.F.I.D.tags act like an electronic safety net to make it easier to catch counterfeits.
VOA: special.2010.03.01
So, for example, if I have a sodium ion over here, and I have a chloride ion over here, where the distance from center to center r I'm denoting as r, this is nucleus to nucleus separation.
所以,比如这有一个钠离子,和一个氯离子,它们中心与中心间的距离,我把它设为,这是原子核和原子和的间距。
P dV is equal to R dT. pV = RT for 1 mole, pdV=RdT so I just take dV here.
对等压过程,那么。
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