然后基于时间距离的思想，在滚动周期策略的框架下，设计了两级系统的联合配送策略。
Secondly, a joint distribution policy was designed based on the concept of temporal distance under the framework.
刷新周期是指图中滚动并显示新的竖条的频率。
The refresh interval is how often the graph scrolls and shows a new bar.
反映滚动轴承故障的特征周期信号处于较低频带内，容易被噪声淹没，难以检测。
The fault characteristic periodic signals of the rolling bearing are in low frequency band and often buried in the noise.
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