Secondly on the relations between Solar activity, lunar phase, earth rolational speed, ie three astronomical factors and theearthquakes happened in pided regions.
本文首先分析了福建沿海地震的时空分布特征及各小区间的关系，然后分析太阳活动、月相、地球自转速率等三大天文因子与各小区发震的关系，得到一些有意义的结果，可供地震中长期预报时参考。
The Influence of Rotation Rate on the Stellar Structure and Evolution;
自转速率对恒星结构与演化的影响
On the base of the corporate formation hypothesis of the planets,this paper premises that all the planets begin with the prograde rotation in the early stage of the solar system.
金星和水星有着与众不同的长周期自转,金星的缓慢逆向自转尤其引人注目,曾有多种假说试图解释其起源。
The path of discus flight and the effects of the throw velocity/angle,spin and wind conditions on discus flight are discussed in this paper,considering the aerodynamic force on the discus.
从铁饼在空气中飞行所受到的气动力出发,阐述铁饼飞行的轨迹和铁饼出手时的速度、角度、自转角速度和风作用对成绩的影响。
The technic of autorotation is one of the most important factors to safe landing.
单发直升机遭遇发动机失效后,只能采用自转飞行的方式着陆,着陆安全与否很大程度地取决于自转的操纵规律。
Gliding descent in autorotation is a maneuver used by helicopter pilots in case of engine failure.
当直升机的发动机失效后，自转下滑就成为驾驶员实现安全着陆的唯一有效手段，这需要熟练的驾驶技术。
The autorotation characteristics of helicopter are directly related to its safety and reliability.
直升机自转特性的好坏,直接关系到该型机安全性和可靠性。
Performance appraisal of a new self-perting acid with viscoelasticity and surface activity;
新型粘弹性表面活性自转向酸的研制及性能评价