This article deduces molecular beam ' s momentum distribution function , calculates mean momentum , root mean square momentum and furthorest possible momentum , and compares them with the characteristic physics quantities corresponding to molecular beam ' s speed distribution function one by one 摘要本文首先推导出分子束的动量分布函数,然后计算了平均动量、均方根动量和最概然动量,并与分子束的速率分布函数相应的特征物理量逐一比较。
According to the wind speed distribution function with exponential rule , the difference value is accurately calculated between the actual wind power produced through the rotor swept area and the wind power produced by taking wind speed at the rotor centre as the design wind speed , and the power increment is obtained 摘要根据指数律的风速分布函数,对风轮扫掠面积上的实际风功率与以风轮中心风速为设计风速产生的风功率的差值做精确计算,得到了风功率的增量。