To measure accuracy in off-line experiments, a relevant dataset must be selected. Usually, the dataset is randomly divided into two parts: 80% as a training set and 20% as a test set of ratings.
要测量离线实验的准确性，必须选择一个相关数据集，数据集随机分为两部分：80%作为训练集，20%作为评分测试集。
Domestic measuring technologies on thin film properties are almost off-line and foreign measuring devices mostly aim to measure individual property.
国内的薄膜特性检测技术大多为离线检测技术，国外的检测设备一般也仅检测个别量。
The EXL is used to control the take-off device by providing a pulse generator to measure line speed accurately for closed loop control.
EXL控制器用于控制拆卸装置的速度，通过脉冲发生器测量不合环路的线速度来实现。
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