index curve

It is found that for a given ventilation system, where the air resistance or pressure in the branch changes, the sensitivity index curve of variation of ventilation volume to that of resistance or pressure in the branch is defi-nite;

研究发现，对于一个确定的通风网络，当分支风阻或阻力改变时，各分支风量变化对其它巷道风阻或阻力变化的敏感指数曲线是确定的曲线；

After flare opening stage apeak distribution of dry weight root in soil was Negative Index curve.

大喇叭口期以后根系干重在土壤中的垂直分布呈负指数曲线趋势变化。

This paper discusses the index curve as contour in the application of pressure regulating valves, introduces the details of the design method, and analyzes characteristics of pressure regulation under different Mach number.

本文论述了半截式指数型面曲线在环状缝隙式调压阀上的应用，介绍了详细的设计计算方法，分析了在不同马赫数下的调压特性。