Second-order derivative UV spectroscopy was used to measure the transfer of befunolol - HCl across full - thickness rabbit skin in vitro.
本文应用二阶导数紫外分光光度法考察了苯呋洛尔溶液体外经皮渗透性。
Moreover, due to the dynamic equations of LPMs with second-order derivative terms in time, the resulting structure-foundation-soil system can be solved by an explicit time-integration method.
此外，由于模型的动力方程具有二阶时间导数项，因而应用本文模型的结构—基础—土系统可以采用显式时间积分求解。
In this paper, the formula of partial derivative of second order on compound function of many varables is established.
本文建立了多元复合函数的二阶偏导数公式。
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