Combined with stoichiometric method, the diene value in cracking gasoline was determined by Fourier Transform Infrared Spectroscopy at selected wavenumber region.

用傅里叶红外光谱仪，在选定的波数范围内，采用化学计量学法测量乙烯裂解汽油的二烯值。

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The experimental results showed that the method is an effective way to improving the performance of stoichiometric engines.

试验结果表明，采用该方法来改善化学计量比汽油机的性能是行之有效的。

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The invention relates to a method of manufacturing a rare-earth doped alkaline-earth silicon nitride phosphor of a stoichiometric composition.

本发明涉及掺杂稀土的碱土硅氮化物无机发光材料的化学计量组合物的制造方法。

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