equ

Starting from the decomposition of wave equ - ation extrapolation operator in 3-D non-uniform medium , the paper gained one-way wave-equation used for true amplitude migration ;

本文从三维不均匀介质中的波动方程外推算子分解出发，得到了用于真振幅偏移的单程波方程；

The calculated Global Warming Potential in the optimized N fertilization treatment was 1027 kg ( CO2 equ ) hm-2 , which was reduced by 72.9 % compared with the conventional N fertilization treatment .

通过对各种排放源进行温室效应增温潜力（GWP）的计算，优化施氮处理在轮作周期的GWP为1027kg（CO（2equ））hm~（-2），比传统施氮处理降低了72.9%。

Mass transfer coefficient measurements were made in a 0.2m diameter x 3.0 m high glass loop reactor with air and different liquids On the basis of experimental data for oxygen absoption into liquid in loop reactor , a equ (?)

在直径为0.2米，高为3.0米的玻璃环流反应器内，测定了空气和不同液体的传质系数KLa。

This paper considers the three aspects : the vibration of the sucker rod , the liguid column and the tubing , and presents a set of new partial differential equ - ations and calculates their numerical solution with finite differential method .

本文综合考虑了抽油杆、液柱与油管的振动，提出了一组新的偏微分方程，并用有限差分法求出其数值解。

The viscosity η in the equ - ation is related both to the thickness of soil stratum H and the coefficient of permeability k after the instantaneous strain produced in above mentioned system , then η is calculated by the theory of Kelvin-Terzaghi relationship .

方程中的粘滞系数η与土层厚度2h以及上述力学模式的土样在完成瞬时应变后饱和黄土的渗透系数k值有关，然后藉太沙基&开尔文理论的相关性计算得出。

The acetylation of Ginsenoside Rb1 was carried out using the classical method – pyridine and acetic anhydride . The following optimum reaction conditions were determined : the acetylation reagent , 2 equ ; reaction time , 2 h ; reaction temperature , the room temperature .

采用经典的吡啶-乙酸酐法首次对人参皂甙Rb1进行乙酰化修饰，从反应物比例、反应时间等方面进行优化，确定最佳反应条件为：使用2当量的乙酰化试剂室温反应2h。