pumping loss

Under weaker pumping conditions stimulated thermal Rayleigh scattering would loss weaker phase information in original wavefront as same as stimulated Brillouin scattering did due to threshold effect;

由于阈值效应，弱抽运时受激热瑞利散射与受激布里渊散射一样将丢失原始波前中较弱的相位信息；

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Engineers call this condition a pumping loss, because in essence an engine is an air pump.

工程师称这种情况是泵气损失，因为发动机在本质上是一个空气泵。

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By numerical simulation we calculate the threshold satisfied by pumping rate r and damping c, and discuss the influence of cavity loss on the steady photon distribution and the mean photon number.

通过数值模拟给出了有损耗情形注入率r与腔损耗系数c之间应满足的阈值条件，并讨论了不同腔损耗对稳态光子数分布和平均光子数的影响。

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Owing to the totally elimination of the throttling action to the air inflow, this kind of unthrottled SI engine can greatly decrease the pumping loss, which makes the fuel consumption reduce 10-15% under small and medium-sized load.

由于完全取消了节气门对进气的节流作用，这种无节气门汽油机将大幅度地降低泵气损失，使中小负荷时的燃油耗降低10-15%。

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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。

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The primary improvement of the model and system development features include: ( 1) to modify groundwater source and sink subroutines for computing precipitation recharge, evapotranspiration loss and groundwater withdrawal. This modification enables the model to simulate influences of climate and pumping wells on seawater intrusion;

模型改进及系统构建包括：（1）改进SUTRA模型的降水入渗补给、潜水蒸散发消耗和机井抽水量等源汇项计算程序，使之可以有效反映气候变化及地下水开采对海水入侵的影响；

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