r*s
发帖数: 2555 | 1 North Korea test-fires ballistic missile, the South Korean military tells
Yonhap news agency |
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x****u
发帖数: 12955 | 2
Terminal maneuvering speed would always be slower than the ballistic flight
speed. |
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x****u
发帖数: 12955 | 3
Ballistic flight stage is in space, maneuvering stage is in atmosphere. |
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r*******g
发帖数: 5495 | 4 China just launched a 'new world order' with Russia
China's new world order: Xi, Putin and others meet for Belt and Road Forum
http://www.cnn.com/2017/05/13/asia/china-belt-and-road-forum-xi-putin-erdogan/index.html
Belt and Road Forum, Beijing (CNN)China's leaders are ringing in what they
hope is a new world order at a major international conference in Beijing
Sunday.
The Belt and Road Forum is China's answer to Davos or the G20, centered
around the colossal One Belt, One Road (OBOR) trade init... 阅读全帖 |
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发帖数: 1 | 5 朝鲜半岛解决进入倒计时？美国总统将在今天先后和日本与中国领导人通话，周五已会
见韩国总统！
http://us.cnn.com/2017/07/02/politics/trump-abe-xi-phone-calls/index.html
(CNN)US President Donald Trump will make back-to-back phone calls to
Japanese Prime Minister Shinzo Abe and Chinese President Xi Jinping on
Sunday, the White House announced Saturday night.
Trump and Abe will speak at 8 p.m. ET. Trump's call with Xi will come 45
minutes later, according to a White House statement.
No information was provided as to what subjects the calls would ... 阅读全帖 |
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w*********r
发帖数: 42116 | 6 The U.S. is open to talks with North Korea if it halts its testing of
ballistic missiles, Secretary of State Rex Tillerson said at a summit of
Asian leaders Monday. |
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t******l
发帖数: 10908 | 7 人类最早的实用数字电子管计算机 ENIAC，就是美帝陆军为了计算炮弹弹道表而造了一
幢电子管小炮楼。
后来马工把程序稍微改了改，就可以用于计算氢弹的可行性。。。这个例子告诉我们三
代出贵族的传承重要性。。。尼玛炮弹弹道都不会算，就想一步登天算氢弹的，基本都
是父母版推妈这种自家娃宇宙第一莫属，也不许数，因为一数就露馅！！！
以上动人的故事发生在 1946 年。今年是 2017 年。
而我前面开的玩笑，军盲五毛们多半没有看懂。。。其实我不鄙视五毛，毕竟都是养家
糊口养娃。。。但智商太低的五毛实在是令人很捉急。
http://en.m.wikipedia.org/wiki/ENIAC
Although ENIAC was designed and primarily used to calculate artillery firing
tables for the United States Army's Ballistic Research Laboratory, its
first programs included a study of the feasibility of the ... 阅读全帖 |
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i***a
发帖数: 4718 | 8 Trump’s Tough Talk on North Korea Puts Japan’s Leader in Delicate Spot
https://www.nytimes.com/2017/08/11/world/asia/trump-north-korea-japan-abe.
html?hp&action=click&pgtype=Homepage&clickSource=story-heading&module=b-lede
-package-region®ion=top-news&WT.nav=top-news
Mr. Trump’s combative language on North Korea makes matters trickier for Mr
. Abe. The president has doubled down on his war of words with Mr. Kim’s
government, saying a previous threat to rain down “fire and fury” on the
North m... 阅读全帖 |
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d*c
发帖数: 588 | 10 A US official said US spy satellites had been observing preparations for a
ballistic missile test that would most likely be an intermediate range
missile that could reach Guam. The official says the assessment is ongoing.
为啥不预警？都是马后炮。 |
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r*****4
发帖数: 4016 | 11 https://www.wsj.com/articles/behind-north-koreas-nuclear-advance-scientists-
who-bring-technology-home-1504711605
华尔街日报
Behind North Korea’s Nuclear Advance: Scientists Who Bring Technology Home
Pyongyang’s recent weapons tests are a reminder of a conundrum: How has the
nation advanced in arms despite international efforts to keep expertise out
of its hands? The answer may lie in students it sends abroad.
By
Jeremy Page and Alastair Gale
HARBIN, China—When North Korea tested what it said was a ... 阅读全帖 |
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D********n
发帖数: 1161 | 12 Instead of Launching a Missile, North Korea Throws a Party
By CHOE SANG-HUNSEPT. 10, 2017
NYTimes.com.
SEOUL, South Korea — North Korea marked its government’s 69th anniversary
not with another missile test, as many had feared, but with a gala party for
the scientists involved in carrying out the country’s most powerful
nuclear test yet last week, the state-run news media reported on Sunday.
The country’s leader, Kim Jong-un, celebrated the national holiday on
Saturday by bringing his nuclear sc... 阅读全帖 |
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D********n
发帖数: 1161 | 13 The Atlantic
Every option the United States has for dealing with North Korea is bad. But
accepting it as a nuclear power may be the least bad.
Pyongyang has been constrained by the same logic that has stayed the use of
nuclear arms for some 70 years. Their use would invite swift annihilation.
In the Cold War this brake was called mad (mutual assured destruction). In
this case the brake on North Korea would be simply ad: assured destruction,
since any launch of a nuclear weapon would invite an an... 阅读全帖 |
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D********n
发帖数: 1161 | 14 Asia Pacific
North Korea Launches Another Missile, Escalating Crisis
By RUSSELL GOLDMANSEPT. 14, 2017
Continue reading the main story
Share This Page
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HONG KONG — North Korea fired a ballistic missile over Japan on Friday, a
bold test that defied the new sanctions resolution adopted by the United
Nations Security Council earlier this week, as well as repeated warnings
from around the world that the country should stop raising tensions.
The missile b... 阅读全帖 |
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b********n
发帖数: 38600 | 16 https://twitter.com/BBCNewshour
North Korea has launched what the US military has described as an
intercontinental ballistic missile. @Shea_Cotton says New York & Washington
DC could now be within reach |
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m**c
发帖数: 7349 | 17 The United Nations Security Council has voted unanimously to impose tougher
sanctions on North Korea in response to its recent ballistic missile tests.
The US-drafted resolution includes measures to reduce the nation's petrol
imports by up to 90%.
China and Russia, North Korea's main trading partners, voted in favour of
the resolution. |
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发帖数: 1 | 18 我在前一篇文章讨论共军的新电磁炮时，提到不论初速多高，任何弹丸的海平面平射有
效射程都不可能超过40公里。结果自然有人质疑这个结论（不盲目迷信权威，是件好事
，即使这个权威就是我），但是因爲这种流体动力学的问题，没有简单的理论解，现象
极度複杂，我无法在留言栏的有限空间里好好解释。考虑了一会儿，觉得虽然有点太专
精，但是一般军迷和媒体都可能会对超音速弹丸受空气阻力而减速的问题有兴趣，却又
从没有人把它科普过，所以我虽不是弹道学专家，还是以物理人的身份讨论一番。不是
理工出身的读者，可以径行忽略这篇文章。
一般科普文章谈到空气阻力，都说阻力= ρ * A * Cd * v^2 / 2 (v是速度，ρ是空气
密度，A是物体的横截面），那么我们只要测量阻力系数Cd，就可以知道在不同速度下
，阻力有多大。换句话说，在空气中穿行的物体，形状可以很複杂，尺寸大小也各自不
同，但是这些影响空气阻力的种种因素（除了速度、空气密度和横截面积之外），全部
被包容到一个系数里去了。例如汽车的Cd，一般轿车在0.28左右，休闲车是0.35，皮卡
则接近0.4。这样的公式，只有在Cd不随速度变化的前提下才有大用... 阅读全帖 |
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t***h
发帖数: 5601 | 19 2月17日，韩国总统文在寅在平昌冬奥会媒体中心公开表示，现在与朝鲜举行首脑会晤
“为时尚早”（too early）“过于仓促”（a bit rushed）。文在寅还说，朝韩之间
的对话正在继续，并敦促朝鲜与美国展开（关于放弃核武问题的）会谈。
2月10日，韩国总统文在寅会见了朝鲜高级代表团并与之共进午餐。期间金与正以金正
恩特使的身份递交了金正恩的亲笔信，邀请文在寅在方便的时候访问朝鲜。但文在寅回
应说，朝鲜需要和美国开展积极的对话，为其访朝创造条件。
以前朝韩进行过两次领导人会晤，第一次是2000年时任韩国总统金大中访问朝鲜，第二
次是2007年时任韩国总统卢武铉访问朝鲜。前两次朝韩领导人会晤是韩国主动进行的，
是奉行对朝阳光政策的金大中和卢武铉主动推进的。
但文在寅的这番表态却是基本拒绝了金正恩的邀请，一切似乎并非意外。原因在于美国
接受朝方对话的前提是必须朝鲜同意放弃核武器，并且也只能是有关朝鲜弃核的磋商对
话。除非朝鲜在核武问题上让步，否则，文在寅访朝的时机并不成熟。
South Korean President Moon says 'too early' for Pyongy... 阅读全帖 |
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发帖数: 1 | 20 【 以下文字转载自 Faculty 讨论区 】
发信人: easternegg09 (), 信区: Faculty
标 题: Washington Post: 针对中国人的新一轮的麦卡锡运动
发信站: BBS 未名空间站 (Fri Mar 9 13:52:30 2018, 美东)
https://www.washingtonpost.com/news/global-opinions/wp/2018/03/08/americas-
new-and-senseless-red-scare/?utm_term=.021b4b748a9b
In early 1951, federal authorities removed 11 Chinese students in handcuffs
from the campus of the University of Illinois at Urbana-Champaign and locked
them in a Chicago jail. As I wrote in my book, ultimately, they (along with
... 阅读全帖 |
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发帖数: 1 | 21 Exchange student arrested in Pennsylvania for allegedly 'threatening to
shoot up' high school: Police
An 18-year-old exchange student from Taiwan was arrested Tuesday night for
allegedly "threatening to shoot up" a Pennsylvania high school, local police
said this morning.
According to the Upper Darby Police, the suspect, An Tso Sun, had a slew of
items in his home including: a military-style ballistic vest; high-powered
crossbow with scope and light; arrows; 29 rounds of 9mm ammunition; a
strang... 阅读全帖 |
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r*s
发帖数: 2555 | 22 Last Updated Mar 28, 2018 7:06 PM EDT
Officials in Upper Darby, Pennsylvania, say it was another school massacre
in the making. A foreign exchange student is under arrest for allegedly
threatening to attack his high school.
Police say the 18-year-old exchange student An Tso Sun was reported for
making a threat.
"He told a fellow student, 'Don't come to school on May 1 because I'm going
to shoot up the school,' and then he said, 'I'm kidding,'" said police
superintendent Michael Chitwood.
But whe... 阅读全帖 |
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发帖数: 1 | 23 An 18-year-old exchange student from Taiwan was arrested Tuesday night for
allegedly "threatening to shoot up" a Pennsylvania high school, local police
said this morning.
According to the Upper Darby Police, the suspect, An Tso Sun, had a slew of
items in his home including: a military-style ballistic vest; high-powered
crossbow with scope and light; arrows; 29 rounds of 9mm ammunition; a
strangling device; a "military" ski mask; and ear protectors for firing. |
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b********n
发帖数: 38600 | 24 3 U.S carriers are no match for even a fraction of China's submarine fleet.
The U.S doesn't announce it but Admirals are terrified of China's sub fleet
and their anti carrier ballistic missiles. |
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发帖数: 1 | 26 OPINION: The Nobel Committee has something of a fetish for awarding the
Peace Prize to centre-left American politicians, regardless of merit. At
least former US president Jimmy Carter had involved himself in decades of
peace initiatives, however futile most proved to be, when he received the
prize in 2002. Former US vice-president Al Gore, on the other hand, won the
prize for his celebrity endorsement of climate change doom-mongering.
In Barack Obama's case in 2009, the rationale was weaker stil... 阅读全帖 |
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发帖数: 1 | 27 transfer of any items, materials, goods and technology that could contribute
to Iran’s enrichment-related and reprocessing activities and ballistic
missile programmes |
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发帖数: 1 | 28 所以你觉得通信设备上的芯片，软件不能帮助核项目？何况我举的决议只是最初的决议
，后面一堆决议层层加码。。
重点是禁运虽然是美国主导的，但毕竟打得是联合国的旗号
: transfer of any items, materials, goods and technology that could
contribute
: to Iran’s enrichment-related and reprocessing activities and
ballistic
: missile programmes
|
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发帖数: 1 | 29 说实话
看不懂楼主的理论
讲简单点，啥是弹道导弹
改变一点点方向有多难
目标移动速度多大
彈道飛彈（英语：ballistic missile）是一种飛彈，通常没有翼，在烧完燃料后只能
保持预定的航向，不可改变，其后的航向由弹道学法则支配。为了覆盖广大的距离，弹
道导弹必需發射很高，进入空中或太空，进行亚轨道宇宙飞行；对于洲际导弹，中途高
度大约为1200公里。当在太空时，不提供推力，导弹做自由落体运动。
感觉只要有可以调节的翼似乎没有问题 |
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b*****d
发帖数: 61690 | 30 The Air Force has offered $5,000 for leads on the whereabouts of a box of
explosive grenade rounds after the cache accidentally fell from a vehicle
while airmen drove on a road in North Dakota, The Washington Post reports.
Airmen from the 91st Missile Wing Security Forces team were traveling on
gravel roads between two intercontinental ballistic missile sites on May 1
when their vehicle’s hatch opened and the ammunition fell out, Minot Air
Force Base said in a statement obtained by the Post.
Las... 阅读全帖 |
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a******9
发帖数: 20431 | 32 防弹头盔有吗
：Black Hawk Commandos ballistic concealable security police hunting combat
：molle safety army kevlar military tactical bulletproof vest |
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发帖数: 1 | 33 US Must Hustle On Hypersonics, EW, AI: VCJCS Selva & Work
By SYDNEY J. FREEDBERG JR. on June 21, 2018 at 3:52 PM
WASHINGTON: China is besting the United States in key military technologies
like hypersonic missiles and electronic warfare, Gen. Paul Selva, vice-
chairman of the Joint Chiefs said today. We can still catch up, he predicted
.
What about Artificial Intelligence? That’s too close to call, said former
deputy Defense Secretary Bob Work, so we’d better get a move on. Both men
spoke at a C... 阅读全帖 |
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s******r
发帖数: 5309 | 34 President Trump cited an “unusual and extraordinary threat” to U.S.
national security as he acted Friday to maintain long-standing economic
restrictions on North Korea, including the freezing of any assets in the
United States.
The official declaration, contained in a notice to Congress, came despite
Trump’s assertion earlier this month that his historic summit with North
Korean leader Kim Jong Un ended the North’s nuclear weapons threat.
“Sleep well tonight!” Trump tweeted on June 13, the day a... 阅读全帖 |
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m**********g
发帖数: 919 | 35 CHINA'S STRATEGIC MODERNIZATION plans took an important step forward August
2 with the first successful flight test of a new intercontinental ballistic
missile (ICBM), known as the Dong Feng (DF)-31.
来来来A在什么地方，你党妈的B和菊花之间？ |
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P**T
发帖数: 2274 | 36 早期东风31A就直接被当作东风31，根本没有区分开来，更别说后来的东风31AG了
August
ballistic |
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s******r
发帖数: 5309 | 37 估计一到北韩冬季，也就是10月以后，又要试射了。
U.S. spy agencies: North Korea is working on new missiles
This commercial satellite image shows North Korea’s Sanumdong missile
assembly facility south of Pyongyang on July 7. The red vehicle in the inner
courtyard is similar to those used by North Korea to transport missiles. (
Planet/James Martin Center for Nonproliferation Studies at the Middlebury
Institute of International Studies)
By Ellen Nakashima and Joby Warrick
July 30 at 6:55 PM
Email the author
U.S. spy agen... 阅读全帖 |
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s******r
发帖数: 5309 | 38 US State Department still predicts North Korean denuclearization — despite
reports of new missiles
U.S. intelligence officials claim North Korea has yet to stop production of
ballistic missiles, according to a Washington Post report.
Arms control experts confirmed to NBC News that satellite imagery, as well
as U.S. intelligence assessments, show that the rogue regime is continuing
to develop more missiles.
The reports come less than two months after President Donald Trump tweeted
that "there is ... 阅读全帖 |
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发帖数: 1 | 40 South Korea to buy ship-based interceptors to counter ballistic missile
threats
这样喂米帝，韩战能结束吗？ |
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t******e
发帖数: 2504 | 41 这是书记？
Missile development work
Hall became Assistant Chief, Non-Rotating Engine Branch, Power Plant
Laboratory, Wright-Patterson Air Force Base, where he participated in the
development of solid and liquid rocket power plants. In 1951, he was one of
four people at Wright Air Development Center (WADC) who were instrumental in
the initiation of Project MX-1593, the Atlas program.[3]
In 1954, Hall joined Western Development Division as Chief, Propulsion
Development, where he was responsible for the... 阅读全帖 |
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b*********3
发帖数: 1709 | 42 The Motley Fool
Published on Oct 8, 2013
The recent Air & Space Conference near Washington, D.C., was an incredible
display of some of the finest defense technologies in the world. Lockheed
Martin (NYSE: LMT) showed off several products, including a giant three-
dimensional long-range radar system -- which will be used by the Air Force
for mobile, long-range surveillance and ballistic missile defense.
https://www.youtube.com/watch?v=pMFyV7pZ8_o |
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发帖数: 1 | 43 穿越了！“山寨”中国JY-26型雷达的美国洛马远程雷达，出现在2013年视频：
The Motley Fool
Published on Oct 8, 2013
The recent Air & Space Conference near Washington, D.C., was an incredible
display of some of the finest defense technologies in the world. Lockheed
Martin (NYSE: LMT) showed off several products, including a giant three-
dimensional long-range radar system -- which will be used by the Air Force
for mobile, long-range surveillance and ballistic missile defense. |
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R*****5
发帖数: 4915 | 44 王五啊，你是只知其一不知其二啊。
美联社：
Dozens of US nuclear missile officers caught up in drug and cheating
scandals
Investigation that began with accusations of illegal drug use expands into
allegations of cheating on proficiency exams
The drug investigation that led to the discovery of alleged cheating was
disclosed by the Pentagon last week. It said then that it involved 10
officers at six bases — five in the US and one in the UK. On Wednesday, the
air force said the number of suspects has grown to 11. Welsh ... 阅读全帖 |
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g**1
发帖数: 10330 | 45 https://youtu.be/Uz4-hXNSMwI
Global Times: DF-26 can hit moving aircraft carriers
According to China’s Global Times, the recent video showing the launch of a
DF-26 ballistic missile revealed details that proves the missile can
accurately attack a moving aircraft carrier.
Military commentators interviewed by the paper says the presence of air fins
in the reentry section allows precision flight path control.
An anonymous source added that the missile is constantly updated by network
with the coord... 阅读全帖 |
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s***c
发帖数: 1926 | 46 https://www.bloomberg.com/news/articles/2019-06-25/trump-muses-privately-
about-ending-postwar-japan-defense-pact
President Donald Trump has recently mused to confidants about withdrawing
from a longstanding defense treaty with Japan that he thinks treats the U.S.
unfairly, according to three people familiar with the matter.
Trump regards the accord as too one-sided because it promises U.S aid if
Japan is ever attacked but doesn’t oblige Japan’s military to come to
America’s defense, the people ... 阅读全帖 |
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发帖数: 1 | 47 哈哈哈
The American and South Korean militaries are analyzing the details of the
latest test launch by North Korea, in which a couple of short-range
ballistic missiles were fired towards the Sea of Japan.
Pyongyang fired the projectiles using a transporter erector launcher (TEL)
about 20 minutes apart from the Wonson area early Thursday morning, South
Korea's Joint Chiefs of Staff (JCS) said, noting that the short-range
missiles flew for around 430 kilometers at an altitude of around 50
kilometers ... 阅读全帖 |
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f******o
发帖数: 2469 | 48 North Korea
North Korea is at it again. The North launched a pair of short-range
ballistic missiles off its east coast, South Korean and US officials said.
That's the second such launch in less than a week. In response, South Korea
held an emergency National Security Council meeting this morning. It's not
clear if the missile launches will affect the working-level talks between
the US and the North, which US Secretary of State Mike Pompeo hoped would
start soon. It was just a month ago when Pres... 阅读全帖 |
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W*****B
发帖数: 4796 | 49 这么多why，这个主要该问那几个小天使吧？凌晨4点去人家家里干啥呢
The brothers' aunt, Thornton, said the family is aching for answers,
wondering why the teens went out in the middle of the night wearing masks,
wondering why they would have confronted the other family, wondering if the
teens had been shot in the back as they were running away, wondering why the
three members of the other family--the homeowner, his mother and one other
person--were outside in their front yard at 4:00 a.m., wondering why the
teens would have walk... 阅读全帖 |
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发帖数: 1 | 50 数据是不是有点问题
When in space no more thrust is provided, the missile enters free-flight. In
order to cover large distances, ballistic missiles are usually launched
into a high sub-orbital spaceflight; for intercontinental missiles, the
highest altitude (apogee) reached during free-flight is about 2,000
kilometers (1,200 mi).[5]
玩完 |
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