time derivative

基本解释

I take the time derivative.
我会计算时间导数。
I'm going to take the time derivative just as I did in the case of the spring.
我将要提取时间,就像我在,弹力那个例子里那样。
We've done this before-- this is the conservation of energy, and in order to find the period of the simple harmonic oscillation, we take the time derivative.
以前算过-,这是能量守恒，为了算出,简谐振荡的周期，我们求时间导数。

If you took the derivative of this, you will get the velocity at time t, it would be: v=v0+at.
如果你对它求导,你就可以知道 t 时刻的速度,即,v=v0+at
耶鲁公开课 - 基础物理课程节选
And the mathematics of that equation involved a double derivative in time of x 0 plus some constant times x equals zero with some constraints on it.
那个数学方程式,包括了x对时间的二阶导数,加上常数乘以x等于,还有一些限制条件。
麻省理工公开课 - 固态化学导论课程节选
If you want to know how fast it's moving at a given time, if you want to know the velocity, I just take the derivative of this answer, which is 10-10t.
如果你想知道它在给定时刻的运动有多快,如果你想知道它的速度,我只要对这个式子求导,得到10-10t
耶鲁公开课 - 基础物理课程节选

From the looks of it ECRI takes the first principle component of these four variables and then charts the first time derivative.
FORBES: On Lakshum Achuthan and ECRI: This is Becoming Embarrassing for Everyone