hyperbolic umbilic 双曲脐 ; 双曲型脐点
parabolic umbilic 抛物脐 ; 抛物型脐点
elliptic umbilic 椭圆脐
umbilic point [数] 脐点
umbilic of a quadric [数] 二次曲面的脐点
hyperbolic umbilic catastrophe model 双曲脐点突变模型
Method The ratio of systolic and diastolic blood stream(S/D value)of umbilic artery was detected by color Doppler ultrasound detector.
方法应用彩色超声多普勒仪器进行胎儿脐动脉血流检测,并分析胎儿及分娩前后情况与血流检测的关系。
In this paper, we make use of the properties of the umbilic to research circle Section question of quadric in 3-dimensional Euclidean space.
文章利用脐点的性质研究了二次曲面的圆截口问题,并给出了与二次曲面交线为圆的圆截口的方程的一种求法。
In this paper, we make use of the properties of the umbilic to research circle section question of quadric in 3-dimensional Euclidean space. We give the equations of these circle sections.
文章利用脐点的性质研究了二次曲面的圆截口问题,并给出了与二次曲面交线为圆的圆截口的方程的一种求法。
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