second order section

基本解释

The temperature dependence of the Raman scattering cross section of first and second order Stokes and anti Stokes Raman processes was discussed theoretically.
从理论上讨论了一阶和二阶斯托克斯与反斯托克斯拉曼散射截面的温度依赖关系；
The spatial distribution of pores on cross section of lotus-type porous magnesium has been studied with second-order characteristics, nearest-neighbour distribution, etc.
采用统计分析方法，通过平面气孔分布的二阶特性、气孔最邻近距离分布等分析了藕状多孔镁横截面上气孔的分布，结果表明气孔呈近程有序排列。
The zeroth the first-and the second-order analytic solutions are obtained for fully developed flow in circular pipes with narrow annular cross section using a perturbation method.
采用摄动法求解了窄环形截面圆孤管道内的粘性流动。获得了速度、压力的零阶、一阶和二阶的分析解表达式。