The qualitative analysis of N polyaromatics in heavy oil was made by a double adsorption separation followed by the application of low voltage ionization and high resolution MS direct sampling.
通过两次吸附分离，然后采用低压电离，高分辨质谱直接进样技术对重馏份油中的含氮多环芳烃进行定性测定。
The temperature behavior of the forward voltage VF of the P-N junction is discussed.
本文讨论了低温下P - N结的正向电压降v _ F随温度t变化的特性。
Fast calculating node voltage and sensitivity of node voltage to any system operating parameter is very important to the real time stakeout and analysis of voltage stabilization in a N-1 system.
快速求取n - 1网络下各节点电压和各节点电压对任一节点系统运行参数的灵敏度对于N - 1网络下的实时电压稳定监视和分析具有重要意义。
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