The zis smaller in diffusion speed compared to y , which shows a bigger range of daily variation . mean wind , when smaller , has no distinct correspondence to the daily cycle of z and y 从沙尘尺度谱和沙尘的沉降末速分析，出现沙尘暴，尤其是强沙尘暴时，系统中的上升气流可达每秒几米的量级，有时甚至更高。
2.
Abstract : solid propellant rocket motors are preferred for most ballistic missiles because they need simple maintenance and can be launched quickly . but the conventional thrust termination devices limit the depletion of every stage ' s grain and increase some extra - weight . an improved method for designing a multi - stage solid rocket based depleted shutdown was provided . in order to solve the problem of lack of thrust termination devices , a device to adjust the burnout angle will match the final burnout velocity and satisfy the desired range . the method can also limit the detection from anti - ballistic missile system 文摘:由于维护简单和发射快速,弹道导弹多用固体火箭发动机,但繁杂的推力终止装置使各级装药不能耗尽并让结构增重.提出了一种对基于耗尽关机多级固体火箭概念设计的改进方法,此方法满足导弹系统主要的战技要求.为解决无推力终止装置的末速不准问题,可在末级发动机采用姿态调整装置,对射角进行调整,配合末速以满足射程要求.本方法还可抑制敌方反导探测
