从地球发射的宇宙飞行器重新进入可探测的地球大气层的过程。宇宙飞行器为返回地面而进入可探测的地球大气层时,按指令启动制动火箭,产生一制动速度向量,在地球引力作用下,便脱离原有轨道而再入。再入方式有弹道式、滑翔式和跳跃式三种。为能安全地再入,宇宙飞行器需具有有控制地耗散其动能和位能的能力。废弃的卫星和空间碎片,随机地或无控制地再入,常在高层大气中因气动加热而烧毁。
再入控制 [航] reentry control
可再入的 reentrant ; [计] reenterable
再入境签证 re-entry visa ; Re-entry Visas
再入大气层飞行器 re-entry vehicle
再入射流 re-entrant jet
再入飞行器 [航] reentry vehicle ; reentry aerocraft ; Ballistic reentry vehicle
再入境许可 Re-entry Permit
多弹头分导再入飞行器 multiple independently targeted re-entry vehicle ; MIRV
相邻再入模型 [高分子] adjacent re-entry model
Secondly, a discussion is devoted to the design of the control systems of ASV re-entry based on the terminal sliding mode control.
其次,基于Terminal滑模控制方法研究了ASV再入飞行控制系统的设计问题。
参考来源 - 基于Terminal滑模的空天飞行器再入鲁棒自适应控制·2,447,543篇论文数据,部分数据来源于NoteExpress
一切有血气的就知道我耶和华已经拔刀出鞘,必不再入鞘。
That all flesh may know that I the LORD have drawn forth my sword out of his sheath: it shall not return any more.
这个小组用上千张再入数据绘制出了航天飞机加热模式的照片。
The team is using thousands of frames of re-entry data to paint a picture of the shuttle's heating patterns.
所设计的再入机动弹道能满足机动弹头对姿态、热流和速度的要求。
The designed maneuver reentry trajectory can meet the demands of attitude, heat flux and velocity for the warhead.
Then, once we did that we could plug that into the formula that I gave you last time and get the standard deviation of the portfolio and the expected return on the portfolio.
再将估算出的数值代入到,上节课给你们的公式中,就能得到资产投资组合的标准差,和该投资组合的预期收益率
If you solve for that, you find y-y0=v0^/, and if you put in the v_0 I gave you, which was what, 10?
如果你解这个式子,你会得到y-y0=v0^/,如果再把我给你的v0代入,那个数是多少 10
They come from writing i prime and j prime in terms of i and j, then sticking it in an expression and identifying the new representation.
写出用 i 和 j 来表示 i' 和 j' 的式子,再代入分量的表达式,就能得到新的式子
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