It monitors the free resource of the system and adjusts a sliding time window on news stream accordingly. This way, the dimensions of document vector and user profile vector change dynamically.

该方法监测系统资源使用情况，通过调整新闻时间窗口、文档向量维度和用户模型关键词维度的方式来动态调整相似度计算的运算量。

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As always, the protocol service is notified by the binding vector entry point about the change in the binding handle.

与平常一样，绑定向量入口点把绑定句柄的变化告知协议服务。

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This acceleration that is necessary to make the change in the velocity vector is always pointing towards the center of the circle.

要促使速度矢量，产生如此的变化，所需的加速度，总是指向圆心。

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If you do, the unit vectors are called i prime and j prime, the components of the vector change.

如果这么做,单位矢量就是 i' 和 j',矢量的两个分量也会发生变化

耶鲁公开课 - 基础物理课程节选

It comes from the fact that velocity is a vector and you can change your velocity vector by changing your direction.

其原理就是,速度是矢量,你可以通过改变方向来改变速度

耶鲁公开课 - 基础物理课程节选

The fact that when you go in a circle, you accelerate is what we're learning here, coming from the fact that velocity is a vector and its change can be due to change in the magnitude or change in direction.

而当你做圆周运动时你也在加速,这是我们在这里所学到的,原因就在于,速度是一个矢量,其变化可以通过改变模长,或者方向来实现

耶鲁公开课 - 基础物理课程节选