...预测-- 关键词] 彩色多普勒；阻力指数比值；胎儿发育 [gap=1042]Key words] Color dopple flow imaging; Resistance index ratio; Prenataldevelopment ...
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Reliability index is influenced by the variance of basic parameters, resistance distribution, and ratio of live load to dead load.
可靠指标与极限状态方程中的各基本变量的变异性、抗力的概型分布、以及活荷恒荷效应比有关。
The combination of three parameters of Doppler is pulse index (PI), resistance index (RI), A/B ratio together with.
用搏动指数、阻力指数、A/B比值，结合二维实时显像对胎儿宫内生长迟缓、畸形、宫内胎儿死亡的研究。
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