r*s
发帖数: 2555 | 1 【 以下文字转载自 Military 讨论区 】
发信人: keystone0504 (金牛), 信区: Military
标 题: 中国潜艇技术间谍奇异的生活习惯
发信站: BBS 未名空间站 (Mon Nov 14 16:50:32 2016, 美东)
今年7月，CNN解密栏目推出8集纪录片《UNTOLD STORIES OF AMERICAN SPIES（美国间
谍故事）》，其中第7集《Red Storm Rising: Naval Secrets Exposed（红潮升起）》
讲述了十年前沸沸扬扬的“麦大志案”。这是有关“麦大志案”的第一次公开的相关视
频资料，详细介绍了美国联邦调查局和海军罪案调查处的调查过程，提供了部分实体证
据、视频监控、通话录音、抓捕拍摄。审讯记录等具体图文资料，信息完整详实，意义
重大。纪录片让我们对“麦大志案”有了更加深入的了解，然而其中许多细节还是让我
们对案件本身产生疑问。
纪录片中提到这个行动是FBI最大反情报行动，FBI特工总管称此案为里程碑案件，对类
似控案的定罪使得之后可以顺利对间谍和间谍类犯罪起诉。
图2 节目截图1
故事发生在200... 阅读全帖 |
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H********g
发帖数: 43926 | 2 【 以下文字转载自 Military 讨论区 】
发信人: pureleaf123 (pureleaf), 信区: Military
标 题: NASA关于EmDrive最新论文发布！人类或将进入全新能源时代
发信站: BBS 未名空间站 (Mon Nov 21 02:00:07 2016, 美东)
美国时间 11 月 17 日，众人翘首以盼的 NASA 关于 EmDrive 的论文终于发表出来了
，论文结果显示 EmDrive 在没有燃料的情况下确实能产生推进力：每千瓦 1.2 毫牛。
资讯业界
NASA关于EmDrive最新论文发布！人类或将进入全新能源时代
NASAnasa中文官网emdrive引擎emdrive 曲速引擎
作者：亚萌
2016/11/20 14:14
美国时间 11 月 17 日，众人翘首以盼的 NASA 关于 EmDrive 的论文终于发表出来了
，论文结果显示 EmDrive 在没有燃料的情况下确实能产生推进力：每千瓦 1.2 毫牛。
本篇论文题目为"Measurement of Impulsive Thrust from a Closed Radio-F... 阅读全帖 |
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s******l
发帖数: 278 | 3 Chapter 10
The Infinite Improbability Drive is a wonderful new method of
crossing vast interstellar distances in a mere nothingth of a
second, without all that tedious mucking about in hyperspace.
It was discovered by a lucky chance, and then developed into a
governable form of propulsion by the Galactic Government's
research team on Damogran.
This, briefly, is the story of its discovery.
The principle of generating small amounts of finite improbability
by simply hooking the |
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f********2
发帖数: 368 | 4 在2005年5月，美国宇航局宣布航海家一號已經在2004年12月，在距離太陽94天文單位
的地方越過終端震波進入日鞘中
2010年12月，旅行者1号已经感受不到太阳风了。
33年的太阳风和行星引力加速，旅行者1号目前是还在工作的速度最快的人造飞行器。
December 13, 2010
PASADENA, Calif. – The 33-year odyssey of NASA's Voyager 1 spacecraft has
reached a distant point at the edge of our solar system where there is no
outward motion of solar wind.
Now hurtling toward interstellar space some 17.4 billion kilometers (10.8
billion miles) from the sun, Voyager 1 has crossed into an area where the
velocity of the hot ionized ga... 阅读全帖 |
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t*n
发帖数: 14458 | 5 会不会把三体人招来
在2005年5月，美国宇航局宣布航海家一號已經在2004年12月，在距離太陽94天文單位
的地方越過終端震波進入日鞘中
2010年12月，旅行者1号已经感受不到太阳风了。
33年的太阳风和行星引力加速，旅行者1号目前是还在工作的速度最快的人造飞行器。
December 13, 2010
PASADENA, Calif. – The 33-year odyssey of NASA's Voyager 1 spacecraft has
reached a distant point at the edge of our solar system where there is no
outward motion of solar wind.
Now hurtling toward interstellar space some 17.4 billion kilometers (10.8
billion miles) from the sun, Voyager 1 has crossed into an area where the
velocity of the hot... 阅读全帖 |
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c****t
发帖数: 19049 | 6 Researchers have found the largest body of water anywhere in the universe,
to date, with mass that measures several trillion times the mass of water on
the entire planet Earth.
The reservoir is gigantic, holding 140 trillion times the mass of water in
the Earth's oceans, residing 10 billion light years away.
"Since astronomers expected water vapor to be present even in the early
universe, the discovery of water is not itself a surprise," the Carnegie
Institution, one of the groups behind the fin... 阅读全帖 |
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c*********n
发帖数: 2120 | 7 http://www.latimes.com/news/nationworld/nation/la-me-qian-xuesen1-2009nov01,0,2865408.story
Qian Xuesen dies at 98; rocket scientist helped establish Jet Propulsion
Laboratory
Deported in 1955 on suspicion of being a Communist, the aeronautical
engineer educated at Caltech became known as the father of China's space and
missile programs.
Qian Xuesen
Qian Xuesen, seen in 1948, a Chinese-born aeronautical engineer educated at
Caltech and the Massachusetts Institute of Technology, was credited with |
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C********g
发帖数: 9656 | 8 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 人类第一台真空能发动机即将在中国攻关成功
发信站: BBS 未名空间站 (Sat May 14 22:28:25 2011, 美东)
高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发... 阅读全帖 |
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s*****e
发帖数: 970 | 9 Nature 462, 735 (10 December 2009) | doi:10.1038/462735a; Published online 9
December 2009
Obituary: Qian Xuesen (1911–2009)
Jane Qiu1
Founder of China's missile and space programme.
Perhaps no one better embodies the irony of the cold-war era than Qian Xuesen,
also known as Tsien Hsue-shen, the Chinese rocket scientist who died on 31
October at the age of 97. Widely acknowledged for his work on rocket propulsion
and his contribution to the US missile programme during the Second World
War, Qian |
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h**f
发帖数: 165 | 10 我一个国内的哥们要查一篇国际会议的全文。他的专业是电气工程专业，主攻的方向是舰
船电力推进技术和舰船磁场研究及消磁。我对他这一行不熟悉。
http://www.marelec.co.uk/conference/programme.aspx 这是 Marelec 2006 Conference programme国际海洋电磁学会议的一个网址（marine electro-magnetic），
他想得到该次会议的论文集，国内检索不到全文。哪位对这个方向稍微熟悉的校友能否帮
我帮我检索一下或查到这些资料。其中有一篇论文题名 Magnetic signature model of
power and propulsion system for rough design 作者信息 Berend Evenblij, TNO
D&V,Netherlands
不胜感激！ |
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s******o
发帖数: 298 | 11 Next year NASA will use rock-nibbling tools to explore the martian surface.
by Elesa Janke
NASA and the Jet Propulsion Laboratory have a new plan to crack the surface
of Mars. While they can't send a human geologist or bring a rock back from
the Red Planet just yet, they have the ability to do the next best thing —
send RATs. Not the furry, four-legged creatures, but high-tech robots with
diamond teeth, known as rock abrasion tools, that will act as field
geologists.
Launching in the summer of 2 |
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s******o
发帖数: 298 | 12 July 24, 2002 | It seems another comet is dissolving into nothingness, right
in front of astronomers' eyes. On July 13th, the NASA Jet Propulsion
Laboratory's Near Earth Asteroid Tracking program (NEAT) reported finding a
peculiar object with a faint coma. Calculations at the Minor Planet Center
soon revealed that the small body had the same motion as the periodic comet
57P/du Toit-Neujmin-Delporte but was separated from its nucleus by some 0.2
degree.
Alerted by those observations, a team of as |
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s******o
发帖数: 298 | 13 July 28, 2002 | Astronomers continue to monitor a newly discovered Earth-
crossing asteroid, even though it now appears that no collision with our
planet is possible in 2019, as had been initially thought. Designated 2002
NT7, the wayward object was first spotted on July 9th by the LINEAR telescope
in New Mexico. Two weeks later NASA's orbital specialists at the Jet
Propulsion Laboratory had pegged the impact probability on February 1, 2019,
at about 1 in 250,000, whereas Italian dynamicists put |
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j*c
发帖数: 97 | 14 MEDIA RELATIONS OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIF. 91109. TELEPHONE (818) 354-5011
http://www.jpl.nasa.gov
STARDUST MISSION STATUS
October 16, 2002
Stardust will take advantage of flying near a small
asteroid next month to test many procedures the spacecraft
will use 14 months later during its encounter with its primary
science target, comet Wild-2.
Star |
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j*c
发帖数: 97 | 15 Date: 21 Oct 2002 15:45:04 GMT
From: Ron Baalke
Newsgroups: sci.astro, alt.sci.planetary, alt.astronomy, alt.soc.comets
Subject: Rosetta Shipped To South American Launch Site
MEDIA RELATIONS OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIF. 91109 TELEPHONE (818) 354-5011
http://www.jpl.nasa.gov
Contact: JPL/Guy Webster (818) 354-6278
Southwest Research Institute/Maria Martinez (210) 522- |
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Z**R
发帖数: 1233 | 16 A "large" US spy satellite has gone out of control and is expected to crash
to Earth some time in late February or March, government sources say.
Officials speaking on condition of anonymity said the satellite had lost
power and propulsion, and could contain hazardous materials.
The White House said it was monitoring the situation.
A spokesman said "numerous" satellites had come out of orbit and fallen back
to Earth harmlessly over the years.
"We are looking at potential options to mitigate any |
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d*********e
发帖数: 3835 | 18 My Client has an immediate need for an aerospace stress engineer with
experience in composite vehicle design, stress analysis, composite repairs,
and production manufacturing. The first task of this role will be to review
stress reports and finite element models developed by partner organization
to determine revised margins based on updated vehicle weights and design
modifications. The stress engineer will also compile analysis, reports,
models, and margins into standardized formats for upload i... 阅读全帖 |
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d*********e
发帖数: 3835 | 19 aerodynamics, performance, propulsion |
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q***l
发帖数: 177 | 20 National Academy of Engineering Elects 66 Members and 10 Foreign Associates
WASHINGTON — The National Academy of Engineering (NAE) has elected 66 new
members and 10 foreign associates, announced NAE President Charles M. Vest
today. This brings the total U.S. membership to 2,254 and the number of
foreign associates to 206.
Election to the National Academy of Engineering is among the highest
professional distinctions accorded to an engineer. Academy membership
honors those who have made outstand... 阅读全帖 |
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m*******r
发帖数: 1701 | 21 【 以下文字转载自 Military 讨论区 】
发信人: mxshopper (mxshopper), 信区: Military
标 题: 呃,五毛开始用死人编谣言了
发信站: BBS 未名空间站 (Sun Jul 31 22:19:52 2011, 美东)
发信人: Shotgun1984 (喷子), 信区: Military
标 题: 10艘航母比不上1条高铁：美国要废掉中国高铁
发信站: BBS 未名空间站 (Sun Jul 31 21:56:43 2011, 美东)
10艘航母比不上1条高铁：美国要废掉中国高铁
2011-08-01 07:36:50.0
美国退役海军上将Hyman George Rickover 前不久说过:十艘航母也比不上一条高
铁对美国的威胁大.首先你要知道，美国为什么一定要废掉中国高铁？
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hyman George Rickover (January 27, 1900 – July 8, 1986) was a four-s... 阅读全帖 |
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g******6
发帖数: 782 | 22 http://www.nae.edu/56154.aspx
National Academy of Engineering Elects 66 Members and 10 Foreign Associates
WASHINGTON — The National Academy of Engineering (NAE) has elected 66 new
members and 10 foreign associates, announced NAE President Charles M. Vest
today. This brings the total U.S. membership to 2,254 and the number of
foreign associates to 206.
Election to the National Academy of Engineering is among the highest
professional distinctions accorded to an engineer. Academy membership
honor... 阅读全帖 |
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x*****u
发帖数: 3419 | 23 http://www.linux-mag.com/2003-06/breakthroughs_01.html
Dr. Thomas Sterling is a Principal Scientist at the NASA Jet Propulsion
Laboratory and a Faculty Associate at the California Institute of Technology
Center for Advanced Computing Research. In 1994, Dr. Sterling initiated the
Beowulf Project at the NASA Goddard Space Flight Center and shared the Gordon
Bell Prize for this work in 1997. He is a principal investigator on the
DARPA-sponsored Cray Cascade Project to develop the world's first
adva |
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l***g
发帖数: 1035 | 24 [sounds like quatum]
My name is Frank Wilkinson and I am a Senior Executive Recruiter with Sterli
ng Partners. Your name has come up through our research as being a leader in
the manufacturing and engineering world. I抦 currently looking for some pro
fessional assistance in locating a world class Power Electronics Development
Manager (EV & HEV Powertrain Components) with at least 10 years of experien
ce in the design and development of power electronics and 8 years in automot
ive engineering.
I w... 阅读全帖 |
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E**********n
发帖数: 2 | 25 做整车市场可能还不太成熟, 做零件怎样? inverter, battery management etc, 像
AC-propulsion 那样做零件OEM,还可以面向DIY市场做consulting.
有兴趣做project可以交流一下. |
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I****t
发帖数: 3 | 26 Multiple Ph.D Assistantships and PostDoc positions are available at Dwight
Look College of Engineering, Texas A&M University, College Station.
Candidates are expected to have strong background in one or more of the
following: advanced controls theory, controls & automation applications,
fluid power, strong hands-on controls experimental experience, or
mechatronics research in both design and hardware prototyping. For Ph.D
assistantship, the applicants should first apply to the Department of
Me... 阅读全帖 |
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U**R
发帖数: 5 | 27 are there any guys out there who are working on astronautics or aeronautics? i
was wondering if any of you could give a quick overview of the major periods
and/or journals in this field. or maybe some popular treatises/books/review
articles, etc. on the astronautic/aeronautic propulsion, e.g. intergalactic
travels, (not even sure about the jargon, hehe) btw, I barely have any
engineering background but always find this field fascinating! Thanks a
million! |
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b*d
发帖数: 285 | 28 Cumpsty: Jet Propulsion
Compressor Aerodynamics
Kerebrock: Aircraft Engine and Gas Turbine |
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h****l
发帖数: 7290 | 29 11.10.2006
Faculty Positions in Aerospace and Ocean Engineering
The Department of Aerospace and Ocean Engineering requests applications for
two tenure-track faculty positions in any of the areas relevant to aerospace
and ocean engineering including, but not limited to, structures, dynamics
and control, aero/hydrodynamics, propulsion, avionics and automation systems
of aerospace and ocean going vehicles.
Applicants must hold an earned doctorate in Aerospace or Ocean Engineering
or a closely relat |
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h****l
发帖数: 7290 | 30 Virginia Polytechnic Institute and State University
The Department of Aerospace and Ocean Engineering requests applications for
a tenure-track
faculty position in any of the areas relevant to aerospace and ocean
engineering. Areas of specific
interest for the department include, but are not limited to, novel
structural concepts and material
systems, multi-disciplinary design and optimization of vehicles, ship power
and propulsion
systems, naval architecture, high speed ship hydrodynamics, experi |
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l********e
发帖数: 2 | 31 大家好，我刚从国内过来读MS,无工作经验，想硕士毕业就工作，不知道本专业的硕在
这里找工作难不难？如果是propulsion方面的CFD呢？还有我比较倾向于做non-thesis
的，但是关于paper的重要性众说纷纭，迷茫了。。。。。。 |
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u****d
发帖数: 122 | 32 主要做推进器设计方面，xiaoyao兄等在Aerospace领域的说说看呢？ |
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i*****t
发帖数: 24265 | 36 美国技术已经成熟，还研究啥？估计中国技术也不错了。 |
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a****l
发帖数: 8211 | 37 I believe you will be very welcomed after you go back to China. |
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c******4
发帖数: 4896 | 38 我一直想知道这个激光推进到底发张到啥地步了？
有没有内部人士透露一下？ |
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p*****9
发帖数: 21 | 40 Title:Postdoctoral Researcher – LES/DNS of Turbulent Combustion
Position Details:
NATURE AND SCOPE OF JOB
Postdoctoral Researcher – LES/DNS of Turbulent Combustion
The Combustion and Propulsion Lab in Ulsan National Institute of Science and
Technology (UNIST), South Korea, is seeking a candidate for a postdoctoral
research position to work with Prof. Chun Sang Yoo in the development of LES
/DNS codes for turbulent combustion and running simulations. The candidate
will write technical papers and ... 阅读全帖 |
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a***n
发帖数: 1993 | 41 同领域的好多都发journal of power and propulsion，但aiaa和asme的if看着都不高
啊。请问有什么更好些的杂志可发么？ |
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I****t
发帖数: 3 | 42 Multiple Ph.D Assistantships and PostDoc positions are available at Dwight
Look College of Engineering, Texas A&M University, College Station.
Candidates are expected to have strong background in one or more of the
following: advanced controls theory, controls & automation applications,
fluid power, strong hands-on controls experimental experience, or
mechatronics research in both design and hardware prototyping. For Ph.D
assistantship, the applicants should first apply to the Department of
Me... 阅读全帖 |
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P*******t
发帖数: 202 | 43 JPL's Aerogel Makes Record Books As Lightest Solid
By Heather Sparks
SPACE.com staff writer
posted: 10 May 2002
11:00 am ET
The Jet Propulsion Laboratory has beaten itself into the Guinness World
Records, again for creating the world's lightest solid.
Described as a solid smoke because it's 99.8 percent air, the material
called Aerogel is actually a stiff foam made from silicon dioxide and sand -
the same ingredients that make glass, but Aerogel is one thousand times
lighter.
Its density is just |
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w***y
发帖数: 1313 | 44 还有这个
http://arxiv.org/abs/0908.1429
Dark Matter as a Possible New Energy Source for Future Rocket Technology
Authors: Jia Liu
(Submitted on 11 Aug 2009)
Abstract: Current rocket technology can not send the spaceship very far,
because the amount of the chemical fuel it can take is limited. We try to
use dark matter (DM) as fuel to solve this problem. In this work, we give an
example of DM engine using dark matter annihilation products as propulsion.
The acceleration is proportional to the velocit |
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p********r
发帖数: 3799 | 45 Read over again and there are some the highlight rules.
2. Traditional drills don't work. The type of drills and the way that most
triathletes do them don't actually have any material effect on swimming
technique.
3. Swim more often. Frequency is the best way to improve your swimming. Also
see rule #4
4. Do longer main sets. You can't expect to swim fast and be fresh on the
bike if you rarely do main sets with the same or higher volume and pace than
you expect in the race. For short course these... 阅读全帖 |
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i*********5
发帖数: 19210 | 46 【 以下文字转载自 Cycling 讨论区 】
发信人: ironman2015 (1/2 ironman x3), 信区: Cycling
标 题: Interbike 2012: Crankarm-based power meters
发信站: BBS 未名空间站 (Tue Sep 25 15:46:01 2012, 美东)
I was at Interbike for the first time this year, and a big trend was crank
arm-based power meters. There were at least three there:
Rotor Power,
Pioneer, and
StagesOne.
The fundamental physics behind each of these three units is the same: to
propel the bike force is transmitted via a mechanical path: pedal body to
pedal spindle to ... 阅读全帖 |
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i*********5
发帖数: 19210 | 47 我让我的两位铁人朋友也看了看，这是他们的评语：
铁人1：You need to develop your kick. Not much power is coming from your
kick. Also there is no glide in your stroke when your hand enters the water.
Looks like Arm is fully extended when enters the water. Try to enter hand a
little back and then reach forward. This will help develop a glide and drop
your stroke count down. High stroke count means using more energy to swim
the same distance. Trying doing a 6/3/6 drill. (On your side do 6kicks then
3stroke and 6kicks on other... 阅读全帖 |
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i*********5
发帖数: 19210 | 48 【 以下文字转载自 Swimming 讨论区 】
发信人: ironman2015 (1/2 ironman x3), 信区: Swimming
标 题: high elbow catch / early vertical forearm (EVF)
发信站: BBS 未名空间站 (Fri Dec 28 09:51:33 2012, 美东)
http://www.osbmultisport.com/articles/strokeanalysis2.html
One of the main points we make in our Powerstroke® clinics is the
emphasis we place on high elbow catch / early vertical forearm (EVF) during
the catch and pull phase of the stroke. Note that you can have a high elbow
catch that does not start particularly early... 阅读全帖 |
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i*********5
发帖数: 19210 | 49 腿和打水
常见打水错误
Top Freestyle Flutter Kick Mistakes
GoSwim - Top Freestyle Flutter Kick Mistakes
TheRaceClub - Secret Tip Legs
Inertia
Stabilizing Force
Lift
Propulsion |
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g*******e
发帖数: 937 | 50 昨天看到杂志上介绍Electric Vehicle, 2003 Toyota RAV4 EV Verson 要$42000, AC
Propulsion eBox (Scion xB)要$66774。还有其他一些EV基本上都是汽油版本的至少
double price.估计这个Tesla也就值5万吧。 |
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