Ambient pressure and correlation between parameters have strong influence on PDE performance when working is unsteady.

以非稳态方式工作的脉冲爆震发动机(PDE),环境压力、参数之间的强相关性对其性能影响很大.

Calculation results show that Isp monotonically increases and the thrust first decreases and then increases when ambient pressure is lowered for the straight PDE.

计算结果表明：对于直管PDE，随着环境压力的减小，比冲单调增加，而推力是先减小后增加；

Meanwhile, some researchers paid great effort to the preparation of Chemical C by ambient pressure for the commercial applications.

同时，一些研究者付出了大量的努力，在制备化学物质C上，通过常压干燥为了商业应用。

The direct effects of large-scale condensation precipitation and cumulus convection condensation precipitation on the ambient pressure field and the geopotential height field are studied.

研究了大气中的大尺度凝结降水和积云对流凝结降水对于环境气压场与位势高度场的直接影响。