并对相位突变和频率突变的情况进行了仿真研究，说明在相位和频率发生变动时三相锁相环仍能有效地锁定相位，能够满足系统变频的要求。
The simulation results prove that the three-phase phase-locked loop can work well in disturbance situation and variable frequency system when the frequency of the inputs is variable.
近年来我国对钢桥面铺装进行了大量的研究，尤其是环氧沥青在钢桥面铺装中的应用，取得了一些成功经验，但仍没有制定相关的规范。
In recent years, based on the paving of long span-bridge deck, there are much more research results, particularly epoxy asphalt in the steel bridge deck, but there are still no correlative criteria.
本文研究了两类新型稠环芳烃接枝聚硅氧烷固定相的合成，并系统评价了它们的色谱性能、应用于实际样品的分离。
In this paper, two new grafted polysiloxane GC stationary phase were synthesized. Evaluation of their chromatographic properties and separation applied to real samples were tested.
本文研究了两类新型稠环芳烃接枝聚硅氧烷固定相的合成，并系统评价了它们的色谱性能、应用于实际样品的分离。
In this paper, two new grafted polysiloxane GC stationary phase were synthesized. Evaluation of their chromatographic properties and separation applied to real samples were tested.
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