secondary-emission ratio

Using k-ε turbulence model and one step eddy-dissipation model, numerical studies on the reacting flow field of solid rocket ramjet with secondary air inlets were carried out. Influence of mass flow ratio on combustion efficiency and temperature field was analyzed.

采用k-ε湍流模型及单步涡扩散化学反应模型，对二次进气结构的固体冲压发动机补燃室的反应流场进行数值模拟，分析了二次进气流量比对燃烧效率与温度场分布的影响。

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VFP ( Value of Floristic Presence), that is, the ratio of the number of the secondary taxa occurring in this place to that in all the world, has been put forward.

本文提出了区系存在度，即某一科（属）在该地出现的的次级分类群与它的所有次级分类群的比值。

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The portability of the software is bad, the utilization ratio of secondary development is low.

软件的可移植性差, 二次开发利用率低.

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The test results showed that, with the increase of the ratio of Es to Eb, the peak values of the primary explosive stress wave increased while that of the secondary wave decreased.

实验结果表明，随着Es／Eb比值的增大，原生爆炸应力波的峰值随之增大，而次生爆炸应力波的峰值则相应减小。

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With high total usage and no secondary pollution, its oil recovery ratio reaches 90 %.

该工艺综合利用率高,无二次污染,油的回收率可达90%,适合于小规模废乳化油的净化 、 再生.

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The influence of the ratio of primary coil and secondary coil, excitation voltage, excitation frequency, diameter of the magnetic core on the sensitivity of the differential transformer are mainly analyzed.

研究了初级线圈与次级线圈间的匝数比、激励电压、激励电源频率、铁芯直径等对差动变压器灵敏度的影响。

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The secondary peak of fingerprint has relative weak feature with relative identification ratio only 0.07 %.

指纹图的“次峰”是相对较弱的特征,相对分辨率仅为0.07%.

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Through analyzing the secondary voltage nave form and adopting intermittent charging to automatically regulate charging ratio, te maximum corona voltage can be obtained with minimum back corona by using EPIC-ⅱ ESP power source control system.

EPIC-Ⅱ电除尘器电源控制系统通过分析二次电压波形，采用间歇供电方式自动调节充电比，可达到最大电晕电压且使反电晕最小。

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Influence of mixture ratio of primary flow on secondary combustion flame stability of ejector rocket motor

一次燃气混合比对引射火箭二次燃烧火焰稳定的影响

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Increasing the exit-pressure and the mass-rate ratio, the temperature in front of the secondary firebox increases, the length of the secondary firebox when the fuel is burnt out decreases, the combustion efficiency increases.

增大出口反压及空燃比，补燃室头部的温度增大，燃料完全燃尽所需的补燃室长度减小，燃烧效率提高；

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