量水管

Through a plenty of data of compressal tests with a lot of samples which are different in moisture content and voids ratio , the relation between pressure,moisture content, cavity ratio and pressural modulus is disclosed in the paper,a table that is suitable for xian district is also made based on the data .

增湿变形是在压力作用下变形达到稳定后由于含水量增大而产生的附加变形，黄土地基可因水管漏水、建筑物排水不畅、地下水位上升等原因引起地基土的增湿，计算增湿变形的关键是研究土体含水量变化后引起的模量变化。

Discharging ballast water with compressed air needs not to install ballast water pump unit that is necessary for pump discharging and simplifies ballast water pipeline system, reduces ship weight, improves the variable loading capacity of marine platform and finally promotes economic benefits.

采用压缩空气来控制与调节半潜式海洋平台或工作船舶的上浮及下潜，是借鉴潜水艇沉浮原理而设计的一种新型压载水排放模式，使用压缩空气排放压载水，免除了使用水泵排放所必须安装的压载水泵组并简化了压载水管系统，减少了船舶的自重，提高了海洋平台的可变载荷量，提高了经济效益。

The experimental results showed that this dissertation has certain practical importance for qualitatively analyze draft tube pressure fluctuation.

对引起尾水管涡带压力脉动的转轮出口环量计算公式进行了简化，也对描述压力脉动两个主要特征参数频率和振幅的计算公式做了尝试性的简化推导，并且通过实例计算说明，本文所做的尝试性的工作，为定性分析尾水管涡带压力脉动特性有一定的实用价值。

Main advances of research on vortices in pump sumps;2. Based on flow field analysis,it shows that owing to the wakes behind the upstream suction pipe,the downstream flow becomes more turbulent and appears with obvious free-surface vortices and submerged vortices in complicated movement.

本文在玻璃水槽内对不同管间距条件下的吸水管周围进行了大量的PIV流场量测实验，通过流场分析显示，上游吸水管的尾流作用加剧了下游吸水口的水流紊动强度，流场多处出现表面旋涡和水内旋涡，其运动形态复杂多变。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。