宇航

本文以大型宇航环境仿真器中的气压控制为例，主要讨论了参数自适应控制的应用及PID自适应控制系统的设计方案及过程。

Taking atmospheric pressure control of large scale astronavigation environmental simulators for example , the main purpose of this paper is to discuss the application of parameter adaptive control and the design schemes as well as procedures of PID adaptive control systems .

航天、宇航和光障宇航飞行器润滑剂概述

Aerospace , Astronavigation and Light Barrier Briefly Review of Spacecraft Lubricants

英国宇航公司已经赢得了3.4亿美元的订单。

British Aerospace has won an order worth 340 million dollars .

他说，向英国宇航公司给予财政优惠未获证实。

The financial concessions granted to British Aerospace were , he said , of a precarious character

记者萨拉·斯克勒斯报道称，美国宇航局目前跟踪了约24，000个太空物体，2016年，空军向卫星所有者发出了3，995，874次警告，提醒他们附近可能有另一颗卫星或碎片的威胁。

Journalist Sarah Scoles reports that NASA currently tracks about 24,000 objects in space , and in 2016 the Air Force had to issue 3,995,874 warnings to satellite owners alerting them to a potential nearby threat from another satellite or bit of debris .

这取决于美国宇航局的Hunch项目中学课堂,比如位于纽约费尔波特的费尔波特高中的科学教师吉恩·戈登和唐娜·希梅尔伯格带领的课堂。

It depending on NASA HUNCH high school classrooms , like the one science teachers Gene Gordon and Donna Himmelberg lead at Fairport High School in Fairport , New York ．

美国宇航局是如何克服这个微小但影响巨大的问题的？

How is NASA overcoming this very tiny big problem ?

就在此时,美国宇航局决定通过拍摄黄石公园的照片来测试一些新的高空相机。

Just at this time NASA decided to test some new high-altitude cameras by taking photographs of Yellowstone ．

戈登说，他的学生每天都会就此问题向美国宇航局的写邮件，时刻准备着一个可行的太空测试方案。

Gordon says his students are emailing daily with NASA engineers about the problem , readying a workable solution to test in space ．

除了‘你是否正朝着目标努力’这一点，那里基本不会有其他要打分的了。基本上，考核的就是‘我要研究出这个产品，然后年底将它呈现给美国宇航局’。工程师会亲自过来给产品做评判，而……

There almost are no grades , other than'Are you working towards your goal ? ' Basically , it 's ' I 've got to produce this product and then , at the end of year , present it to NASA ． ' Engineers come and really do an in-person review , and ．．．

迈克穿着宇航服在我旁边,但他不能接替我的角色。

Mike was next to me in his space suit but he could not take over my role .

这项综合了12所大学和气象机构的9位气象研究员的成果的研究基于2012年美国宇航局DC-8风暴追逐机开展的一项空中飞行实验。这架飞机用于查看雷暴云顶层的砧状云。

The study , which included contributions from nine atmospheric7 researchers across a dozen universities and meteorological agencies , was based on an airborne research flight conducted by a NASA DC-8 storm-chasing plane in 2012 .

一个宇航机器人不能象“漫步者”那样，身在太空，头在地球

A robot cannot have a remotely linked head , as Ambler did .

他们最后中止了这次宇航飞行

They aborted the space flight finally .

科学家们重新分析了美国宇航局宇航员在1972年阿波罗登月任务期间收集的月球外壳样本。

The scientists re-analysed a sample collected by NASA astronauts during the 1972 Apollo mission .

该任务将有助于美国宇航局为2030年后人类探索火星做好准备。

The mission will help prepare the agency for future human exploration on Mars in the 2030s .

SAW器件在军事和宇航系统中的应用

SAW Devices for Military , Astronautical and Aeronautical System Applications

宇航中的一种基于线性约束数据库的GIS空时数据模型及其查询

A GIS spatiotemporal data model and its query based on linear constraint database in astronautics

南西·格蕾丝·罗曼（NancyGraceRoman）是美国宇航局首任天文学部门主管，她于1959年加入美国宇航局，她领导的工作促成了哈勃望远镜的诞生。

NASA 's first chief of astronomy was Nancy Grace Roman .

我最喜欢的一个故事：约翰·F·肯尼迪访问美国宇航局太空中心时，

One of my favorite stories is when JFK went to go visit the NASA space center ,

NASA格林研究中心的宇航推进与动力计划

NASA Glenn Research Center 's Aerospace Propulsion and Power Project

曾为美国宇航局工作的3D粉笔画大师库特·维纳，喜欢在人行道或石子路上展开自己丰富的想象，为世界各国带来让人叹为观止的超越现实之作。

The3D Master artist and former NASA worker Kurt Wenner uses his mathematical skill to create illusions on cobbles and pavements across the world .

TIG弧焊机器人系统在宇航大型铝合金贮箱箱底拼焊中的应用

Application of TIG welding robot system to welding of aluminum alloy space store-vessel

美国宇航局（NASA）的科学家日前宣称，最新证据表明，土星的最大卫星泰坦存在生命迹象。

Scientists from NASA have found evidence of life on Saturn 's biggest moon , Titan .

美国宇航局解说员RobNavias宣布了这次任务以及航天飞机项目的结束。

NASA commentator Rob Navias announced the end of the mission and the space shuttle program .

但该研究使用的是美国国家宇航局（NASA）发来的卫星数据，所以并不会受到这些限制的影响。

But the study uses satellite data from America 's NASA which is not subject to these restrictions .

CNN，JohnZarrella从弗洛里达肯尼迪宇航中心发回的报道。

John Zarrella , CNN , at the Kennedy Space Center in Florida .

这张有点透视效果的图是从美国宇航局的钱德拉X射线天文台获得的鹰状星云的中心地区，它揭示出传说中的“创作之柱”里包含着数量惊人的恒星。

This penetrating view of the central region of the Eagle Nebula from Nasa 's Chandra X-ray observatory reveals the incredible amount of star formation inside the iconic'Pillars of Creation ' .

设在佐治亚州的美国湾流宇航公司（Gulfstream）最近与民生银行（MinshengBank）签署了总额为26亿美元的谅解备忘录。

Georgia-based Gulfstream recently signed a $ 2.6 billion Memorandum of Understanding with Minsheng Bank .

这是半个世纪来美国宇航局NASA日程上首次没有载人太空飞行任务。

For the first time in half a century , the space agency Nasa has no manned space flights on its agenda .