通过计算图像梯度信息，选取边缘区域像素作为控制点，既改善减影图像质量，又提高运算速度。
The quality of the subtraction image was improved and computation time was reduced by selecting edge pixels as triangular control points.
算法还将相关匹配与伺服系统的控制特性结合起来进行考虑，更加合理地选择匹配区域，从而允许更快的伺服控制速度。
The algorithm also combines correlation matching with the control characteristic of servo system, selects the matching area more reasonably, and thus enables a faster servo control speed.
在如何选择对焦评价函数和对焦区域、如何进行反馈控制和如何提高对焦速度等方面，还有诸多问题有待解决。
Such as how to select focus functions and focus Windows, how to perform feedback control, and how to improve the auto-focusing velocity etc., are far from completely solved.
对零低速区域速度的有效辨识是异步电动机无速度传感器控制的一个重要课题。
Effective speed identification in low speed and standstill area is an important item for speed sensorless control of asynchronous motor.
或者，当控制阀进入吸盐环节，控制阀通过盐井吸入的盐水快于盐水进入这个区域的速度。
Or, when the control valve goes into the brine draw cycle, it can draw the brine from the brine well faster than it can flow into this area.
预置速度超出控制及特定区域离开控制；
预置速度超出控制及特定区域离开控制；
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