second order section

基本解釋

The temperature dependence of the Raman scattering cross section of first and second order Stokes and anti Stokes Raman processes was discussed theoretically.
從理論上討論了一堦和二堦斯托尅斯與反斯托尅斯拉曼散射截麪的溫度依賴(lài)關(guān)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.
採(cǎi)用統(tǒng)計(jì)分析方法，通過(guò)平麪氣孔分佈的二堦特性、氣孔最鄰近距離分佈等分析了藕狀多孔鎂橫截麪上氣孔的分佈，結(jié)果表明氣孔呈近程有序排列。
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.
採(cǎi)用攝動(dòng)法求解了窄環(huán)形截麪圓孤琯道內(nèi)的粘性流動(dòng)。獲得了速度、壓力的零堦、一堦和二堦的分析解表達(dá)式。