Based on the requirements of information security for spacecraft telecommand and data protection mechanism adopted,the weakness of short length spacecraft telecommand messages in secure transmission was analyzed.
针对航天器遥控信息安全需求和相应的数据保护机制,分析了遥控短消息在安全传输中的弱点,提出了一种用于改善该弱点的基于物理噪声源的消息扩展方法,以及其应用实例;同时给出了应用该方法所必须采取的信道差错控制措施。
Research on skylight arrangement and transport organization of single-track railway;
单线铁路的天窗开设与运输组织问题研究
Energy consumption characteristics of day lighted buildings with skylight;
天窗昼光照明能耗特性的研究
The optimum study on the running scheme of passenger train and skylight on the speed-up busy Line;
提速繁忙干线旅客列车开行与天窗设置的组合优化研究
pneumatic operator of window and skylight
窗及天窗气动开关器
manual operator of window and skylight
窗及天窗手动开关器
electrical operator of window and skylight
窗及天窗电动开关器
the best windows for escape are those which open onto a roof.
最佳的逃生窗口是开在屋顶上的天窗。
skylight opener of base metal
天窗开关,贱金属制
fitting ,of base metal, for skylights
天窗配件,贱金属制
Electric sunroof in glass version
防紫外线电动玻璃天窗
hand wheel type skylight controlling gear
手轮式天窗传动装置
chain wheel type skylight control gear
链轮式天窗传动装置
a gabled extension built out from a sloping roof to accommodate a vertical window.
屋顶斜坡上凸出的天窗。
A skylight constructed so that it cannot be opened.
固定天窗这样建造的天窗使它不能被打开
There was no skylight in the low roof, no window in any wall.
低矮的屋顶上没有天窗，所有的墙上都没有窗户。
At the top of the cave is a natural "sky-light"through which one can see a beautiful array of interesting-looking rocks below.
洞顶有“天窗”，从天窗朝里望，洞内玲珑剔透，千奇百怪；
He drew back the curtain;it was day.
他拉起窗帘，是白天了。
Pots of geraniums stood on the windowsill.
窗台上放着几盒天竺葵。
Outside the windows it was pitch dark.
窗外天色是完全黑了。
velvet-draped windows.
遮蔽着天鹅绒的窗户。
A strong shutter or plate fastened over a ship's porthole or cabin window in stormy weather.
舷窗内盖一种坚固的百叶窗或厚金属板，系在船的舷窗上或船窗玻璃上，用在暴风雨的天气中