Different methods are described to measure sludge sedimentation and filtration properties, by use of sedimentation indices, initial sedimentation velocity and capillary suction time.

利用沉积作用，最初的沉积作用速度和吸附时间，描述测量烂泥沉积作用和过滤产物的不同方法。

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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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