Based on proportional navigation which is popularly used, target maneuver and guidance command is analyzed, and one design method of beginning time of reaction-jet is proposed.
文中基于广泛应用的比例导引律，对目标机动与导引指令信号进行分析，提出了一种直接力引入时机的设计方法。
It became popularly known as the bird's nest because of its unusual design of interlaced steel girders like the twigs of a bird's nest.
由于它的设计不同寻常，其交错的钢梁像一个鸟巢上的树枝，而被人们广泛称为“鸟巢”。
With computers popularly used in structure design, the concept design and structure measures are more and more important.
随着计算机在结构设计方面的普及，结构设计中的概念设计与结构措施愈来愈显得重要。
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