The formulas for determining the equivalent focal length, principal planes, focal planes as well as the GRIN lens law are derived.
导出透镜的等效焦距，主面、焦面位置以及高斯成象公式。
Starting from the ray path equation, object-image relationships are found and used to determine the equivalent focal length and the principal planes of tapered GRIN fiber.
本文从光线轨迹方程出发，推导了锥形梯度折射率纤维的物像关系式，并得出了它的等效焦距和主平面位置。
This paper advances a direct observational method to determine two principal planes corresponding with two principal stresses Belng simple and obvious, this method ean be mastered easily.
本文提出关于平面应力状态单元体上两个主平面与两个主应力对应关系的直观判断方法。
With a complex tectonic assemblage, there are three principal slip planes and three main extensional decollement - decoupling faults in this area.
区内主要滑动面有三个，主要伸展型滑脱拆离断裂有三条，并具有复杂的构造组合。
The numerical results showed that the intermediate principal stress weightily affected the spatial combination regularities of different kinds of structure planes.
计算结果表明：中间主应力对构造结构面之间的空间组合规律具有重要影响。
A numerical computation test shows the possibility of inferring the principal axes of tectonic stress from the p, b, t axis of earthquakes with randomly oriented fault planes.
通过数值试验论证了利用多个断层面随机取向的地震的P、B、t轴推断构造应力主轴方向的可能性。
A numerical computation test shows the possibility of inferring the principal axes of tectonic stress from the p, b, t axis of earthquakes with randomly oriented fault planes.
通过数值试验论证了利用多个断层面随机取向的地震的P、B、t轴推断构造应力主轴方向的可能性。
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