Automatically modulating the fan's rotational speed according to cooling requirement can not only reduce the power and fuel consumptions, but also reduce noise level and prolong the engine's lifetime.
The difference method for solving pure vibrational energy level and vibration-rotational energy level is proposed in this paper.
提出了利用差分法计算双原子分子纯振动能级和振-转能级的具体方法。
3
The result of three years from 1997 to 1999 showed significant effect of post grazing residual and P level on seasonal and annual net production of the sown pasture under sheep rotational grazing.