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.
对于新装修的房屋,居民应该放置几个月,让室内通风,然后再入住。
For newly-decorated houses, residents should let them ventilate for several months before moving in.
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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