static-elevation difference

Performance Test of Axial Fan for Mine Ventilation at the Actual Locale Based on Difference of Static Pressure

基于压差法的矿用轴流式主通风机现场性能测试

Because the design of this article is under the static background, uses the frame difference method, the movement target tracking uses the center of mass tracking method, may achieve easily the detect effect.

由于本文的设计是在静态背景下，故采用帧差分法，运动目标跟踪则采用质心跟踪法，可以很容易达到检测的效果。

But total pressure loss increases with the increasing of the velocity difference accompanied with the increase of the density and the static temperature ratio.

但速度差随密度比、静温比增大而增大时总压损失亦随之增大。

Based on careful analysis, it is considered that the root causing the complex accident is the pressure difference between the balance pressure needed and the actual water static pressure down hole.

本文通过分析得出，造成大26井井壁坍塌及其后的井下复杂情况的根本原因是起钻所需平衡压力与实钻井底水静压力之间存在压差。

Emphasize the difference between limiting bearing capacity of single stake on end and the end pressure in construction suggest that the terminal pressure control method of static prefabricated stake.

进一步强调施工时的终压力与单桩竖向极限承载力之间的区别，并提出场地静压预制桩的终压控制方法。