This means that if you took two trips 10 years apart to the North Magnetic Pole by following a compass, you'd end up at a different destination each time. Theory 8:2012 and the end of the world.
这意味着，如果你相隔10年跟着指南针所指方向去北极的话，那么这两次你所到的目的地是不同的。
Firstly, the state variables of the reentry vehicle are decomposed into two sub-systems of different time scales using the singular perturbation theory.
首先，利用奇异摄动理论对再入飞行器状态变量进行两个时间尺度的划分，将系统状态方程分解成两个低维子系统。
This article expatiate the theory and two kinds of practicable arithmetic of drilling time which used in the oil drilling process, and give notice of the two kinds in the design.
本文阐述了石油钻探过程中钻时参数的测量原理及其两种实用算法，并指出了在设计实现过程中的注意事项。
应用推荐