有必要对加速度给出一个严格的定义，加速度,作为一个矢量,是速度的一阶导数。
So, the definition will take effect. The acceleration is as a vector, and the acceleration vector is just the derivative of a velocity vector.
给出了在无穷远处具有有穷极限的函数的有关导数的几个定理及其严格证明。
The paper gives several theorems for derivate of the function with finite limit at the infinite point and its strict proof.
研究表明，通过借助于矢阵概念，在涉及多个坐标系时，张量的相对导数得到了更加清晰和严格地描述。
It was shown that with the help of vectrix one can treat the relative derivatives of a tensor more clearly and more rigorously when multiple reference frames were concerned.
应用推荐