抽油机电液伺服加载系统存在非线性和位置扰动引起的准确度问题,传统的控制方法不能达到理想的效果。
Aiming at the problems as the nonlinear factors and the position disturbance in the electro-hydraulic servo loading system of pumping unit, the conventional control method cant attain perfect effect.
再加上有些测序技术存在内部方法上的问题,以牺牲准确度而换来的速度和简便度,使得测序结果不可靠。
Moreover, several techniques are inherently unreliable, having traded speed and simplicity for accuracy.
普莱尔说,直接观测风速本身就是有问题的,风速计并不精确,它的准确度甚至不如体温计。
Direct observations of wind speeds are inherently problematic. Anemometers are far less accurate and consistent than thermometers, Pryor says.
Okay. So how can accuracy be a problem?
准确度何以作为一个问题呢
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