平行线(parallels)和经络(meridians)的区别 平行线和子午线这两个术语经常出现在地理和科学领域。我们使用的世界地图上有国家、大陆和海洋的标记,但是你有没有想过地图上的不同线条?这些线被称为平行线和子午线,帮助我...
...连接的数据传输速率很好奇: Intuitively, you would think that parallel data tran**ission should be faster than serial data tran**ission; in parallel you are transferring many bits at the same time, whereas in serial you are doing one bit at a time. So what makes SATA interfaces faster th...
...tor中的钢笔工具之前,最有用的一件事是基本了解向量是如何工作的,它们是什么,以及它们与像素的区别。您可能还记得,How To Geek在去年的一篇老文章中已经讨论了像素和向量之间的差异。刷新你对差异的记忆是很有帮助的...
...线是由方程y2=x给出的,当一个平面上的一组点与准线、一条给定的直线、与焦点等距离时,一个给定的点是固定的,称为抛物线。抛物线有许多实际应用。它们用于设计导弹、汽车头灯反射器、望远镜、雷达接收器和卫星天线...
...数函数和对数函数中。平行于x轴的渐近线称为水平轴。 如何求水平渐近线 如果曲线的函数满足下列条件,则存在渐近线。如果f(x)是曲线,则存在水平渐近线,如果, 则存在水平渐近线,方程y=C。如果函数在无穷远处接近...
...向指向矢量的方向,线段的长度与矢量的大小成正比。 如何写向量 A vector can be written down in several ways. One method is to use bold characters e.g. . You can also use an underline ( ) or an arrow drawn on top of a letter ( ). If the symbol for a vector is written with...
...题,可以使用四个“suvat”方程。我们将看看这些方程是如何推导出来的,以及如何用它们来解决沿直线运动的物体的简单运动问题。 距离(distance)和取代(displacement)的区别 Distance is the total length of the path traveled by an object. This is a ...
...osition, , is , then the displacement of the particle is given by: . 如何计算位移 什么是速度(velocity)? 速度是位置相对于时间的变化率。定义为: . 什么是加快(acceleration)? 加速度是速度相对于时间的变化率。定义为: . 什么是一维运...
...t and causes the object to move through a displacement in a direction parallel to its line of action, as shown below: How to Calculate Work Done – Displacement Parallel to Line of Action Then, the work done is given by, 现在考虑力与物**移成一定角度的情况。例如,把割...
... by electr*** flowing continuously in one direction. As the electr*** flow through various components in the circuit, they lose their electrical energy. DC power refers to the amount of energy dissipated per second by a coulomb of electr***, as they travel between two points in a circuit. In a D...