球齿轮机构可用来传递空间球面运动。
The spherical gear device can be used to deliver spherical motion.
球面摆铅直方向的运动由一非线性振动方程描述。
The motion of spherical pendulum in z direction is described by nonlinear oscillation equation.
文摘：给出了多重迭代布朗运动关于球面的首中时的分布与末离时的分布。
Abstract: The distributions of first hitting time and last exit time of a sphere for multiply iterated Brownian motion are presented.
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