time of pumping

The effect of the pumping station operation on n is greatest, at that time, the n equals ( 1.0);

泵站下闸通水对n的影响很大，泵站运行1年后，n值在1.0附近；

When the pumping time between 30 days and 40 days and the amount of pumping pollution between 70% and 80%, the pumping efficiency significantly reduced.

当抽水时间大于30天-40天，抽出污染物的量大于70%-80%时，抽水效率有明显的降低，随着时间的增长，降低速度越来越快。

The time and law of interval pumping for the oil wells having no enough liquid supplying are studied.

同时利用该技术对供液不足的油井进行间抽时间和间抽规律的摸索。

Through the means of pH adjusting and formula modification, the time for gel formation can be controlled under the temperature of 70 ￣ 130 ℃. It has favorable pumping ability and retention ability in pores.

该堵剂用调节pH值及变化配方等方法，在70～130℃下可控制成胶时间，在成胶前有较好的泵送性和在孔隙中的滞留能力。

By the effective and the real time controlling of the middling pumping flow in the floatation cycle, the process of floatation was kept to a relative constancy, hence the goals of improving separating targets and reducing metals loss have been attained.

通过有效调节，实时控制浮选循环中的中矿泵流量，使浮选过程保持相对稳定，从而达到了提高选别指示，减少金属流失的目的。

Time density distribution of pumping station annual operation head has a few influences on selecting adjusting modes.

泵站年运行扬程时间密度分布情况对工况调节方式的选择稍有影响。

Pumping Efficiency Affected by the Seating Time of Valve Ball

阀球入座时间对抽油泵泵效的影响

Using power function to describe the production rate, pressure and translating them into laplace space, the early time testing data of the pumping well can be modified to the radio flow period.

利用幂函数描述产量与压力值，并通过拉氏变换进行校正，可将抽油井测压早期段数据校正到径向流段，从而大大缩短抽油井测压时间。

The sewage pumping station has the characteristics of nonlinear, time-varying and complex lag, so it is difficult to obtain satisfactory control using conventional PID control.

污水泵站系统具有非线性、慢时变、滞后性等特点，采用常规的pid控制很难获得满意的控制效果。

All the time, they are pumping huge amounts of waste gases into the atmosphere.

一直以来, 他们都向大气层灌输巨大数量的汽油损耗后的废气.