Google reiterated their intent to switch to the new billing system on August 31, saying that it will go into effect in the second part of September.
8月31日，Google重新阐述了他们切换到新计费系统的意图，声明：新计费系统将会在9月的后半段生效。
Making use of equivalent principle of second order effect, the load on middle stories is converted into that at top and the approximate formula for the critical load of the system is suggested.
利用二阶效应等效的原则，提出将中间层荷载等效为柱顶荷载的近似折减方法，提出结构稳定承载力的近似公式。
The damping ratio is an important characteristic parameter in a second-order system, which has great effect on the dynamic characteristic of the second order system.
阻尼比是二阶系统的一个重要的特征参数，它对二阶系统动态特性有较大的影响。
应用推荐