The models pre-dict particle concentration as a function of the flow rate, the particle removal efficiency of the filter, and filtration time.

这些模型预测了粒子浓度与流速、过滤器的粒子去除效率及过滤时间的关系。

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Companies, especially multinationals, based in these cities are spending tens of thousands of dollars to install air filtration systems and real-time pollution monitoring devices in their offices.

各个将总部设置在这些城市的公司(尤其是跨国公司)都花费上万美金，在办公室内安装空气过滤系统和实时污染监测设备。

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The sludge residence time in the screw press and thus the filtration time can be adjusted to individual requirements by adjusting the rotational speed of the screw shaft.

污泥停留在螺旋压力机的时间，（即）过滤的时间可以根据实际情况通过改变螺杆轴转的速调整。

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