q*******n
发帖数: 20306 | 1 这则消息有趣：
美军和土军合伙设埋伏，意图在俄罗斯的苏－２４在飞经土耳其领空的那几秒时间里把
它击落，事先把一切都计算安排好了， 只等着苏－２４掉进布置好了的陷阱里。
但土军的两架Ｆ１６迟到了两分钟，导致到场时苏－２４已经飞离了土领空。
而Ｆ１６电脑上事先设定的射击命令没被及时取消，仍然发射，击落了已经在叙利亚领
空的苏－２４。
美土导演的这出戏，虽经精确计算，出了点意外演砸了，误送俄罗斯一个道德制高点。
A U.S. Air Force Boeing E-3 Sentry AWACS plane took off on 24 November from
the Preveza airbase in Greece. A second E-3A of the Saudi Arabian air force
took off from the Riyadh airbase. Both planes were executing a common task—
determining the precise location of Russian aircraft. It is they th... 阅读全帖 |
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j***h
发帖数: 3205 | 2 蠢JB，你看的懂英语吗？
http://freebeacon.com/national-security/chinese-submarine-stalk
Chinese Submarine Stalked U.S. Aircraft Carrier
Attack submarine sailed near USS Reagan south of Japan
A Chinese attack submarine stalked the aircraft carrier USS Ronald Reagan
near Japan last month in the closest encounter between a carrier and a
People’s Liberation Army Navy submarine since 2006, according to American
defense officials.
The Chinese submarine sailed very close to the Reagan during the weekend of
Oct. 2... 阅读全帖 |
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w********g
发帖数: 3780 | 3 很有意思
What country does he consider the greatest challenge to America in the
coming decades? “In terms of traditional great-state relations, I do
believe that the relationship between the United States and China is going
to be the most critical,” he said. “If we get that right and China
continues on a peaceful rise, then we have a partner that is growing in
capability and sharing with us the burdens and responsibilities of
maintaining an international order. If China fails; if it is not able to
m... 阅读全帖 |
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l**t
发帖数: 6971 | 4 头脑清楚，大局观强。虽然我现在是江轮，当年我也没觉得江core有多厉害。事后回味
才看出来江core不容易。
从Atlantic的文章摘抄的
http://www.theatlantic.com/magazine/archive/2016/04/the-obama-d
Obama看中东外交：
I have come to believe that, in Obama’s mind, August 30, 2013, was his
liberation day, the day he defied not only the foreign-policy establishment
and its cruise-missile playbook, but also the demands of America’s
frustrating, high-maintenance allies in the Middle East—countries, he
complains privately to friends and advisers, that seek to exploit Ame... 阅读全帖 |
|
l**t
发帖数: 6971 | 5 头脑清楚，大局观强。虽然我现在是江轮，当年我也没觉得江core有多厉害。事后回味
才看出来江core不容易。
从Atlantic的文章摘抄的
http://www.theatlantic.com/magazine/archive/2016/04/the-obama-d
Obama看中东外交：
I have come to believe that, in Obama’s mind, August 30, 2013, was his
liberation day, the day he defied not only the foreign-policy establishment
and its cruise-missile playbook, but also the demands of America’s
frustrating, high-maintenance allies in the Middle East—countries, he
complains privately to friends and advisers, that seek to exploit Ame... 阅读全帖 |
|
n*******4
发帖数: 2285 | 6 说东风有误差也是误差几百米那种。可你根本无法预测哪颗能中，哪颗不能中， 都得
发SM拦截，不然就来不及了，df-21九分钟就飞抵目标，SM3反应时间只有2-3分钟， 因
为它自己加速，飞到大气层外需要时间。
看看wiki上的评价，估计SM3,SM6,SM2拦截东风单发成功率远低于50%！能到10%就不错
。即便50%， 也要7颗拦截弹才能达到99%拦截成功概率。
https://en.wikipedia.org/wiki/DF-21
United States Naval Institute in 2009 stated that such a warhead would be
large enough to destroy an aircraft carrier in one hit and that there was "
currently ... no defense against it" if it worked as theorized. The United
States Navy has responded by switching its focus from a ... 阅读全帖 |
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g**1
发帖数: 10330 | 7 Interceptor missile mission a ‘failure’
T. S. SUBRAMANIAN
COMMENT (2) · PRINT · T T
http://www.thehindu.com/news/national/interceptor-missile-missi
The interceptor never took off to intercept incoming “enemy” missile, say
sources
The interceptor missile mission, which took place on May 15, was a failure
despite claims of the Defence Research and Development Organisation (DRDO)
to the contrary. The interceptor never took off to intercept the incoming “
enemy” missile which merely fel... 阅读全帖 |
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G*******n
发帖数: 6889 | 8 Lethal Gunnery Ballistic Trajectory |
|
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m****i
发帖数: 3406 | 10 2300亿换来的啪啪啪
Obama to Xi: we will talk about human rights and cyberattacks
U.S., China G20 talks begin with airport row:
http://reut.tv/2c1rnaL via @ReutersTV
Obama to Press Chinese President Xi Jinping on Cyberattacks, Human Rights,
Adviser Says
In meeting with Xi Jinping, Barack Obama to make it clear that ‘economic
espionage’ practices must change, National Security Adviser says
WASHINGTON—Differences between the U.S. and China over cyberattacks and
human rights won’t be “papered over” during... 阅读全帖 |
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m**c
发帖数: 7349 | 11 Most worrying is the question of whether North Korea can make a nuclear
warhead small enough to put on one of those missiles, and robust enough to
endure a trajectory that would take it into space and back.
The North boasts that it can, although observers are sceptical. Yet there is
no doubt that it is making rapid progress in its nuclear programme.
It is clearly a priority for Mr Kim, who seems to be devoting even more of
North Korea’s relatively meagre resources to it than his father did. |
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m**c
发帖数: 7349 | 12 鈥淗e might聽go back on the agreement聽in Paris but the net effect for the
US is not likely to make much of a difference, if at all, in terms of our
trajectory,鈥an anonymous White House official told the Guardian in May. |
|
W*****B
发帖数: 4796 | 13 From ‘Humility to Euphoria’: Donald Trump’s Team Triumphs
By Gabriel Sherman
ShareShareTweetShareShareEmail
Photo: Bloomberg/Bloomberg via Getty Images
Shortly after 3 p.m. on November 8, Donald Trump walked into the war room on
the 14th floor of Trump Tower and received rousing cheers from his staff.
While virtually the entire media Establishment was predicting Hillary
Clinton was on track to win the election, Trump’s team remained “nervous
but optimistic,” in the words of one adviser, that the... 阅读全帖 |
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f********t
发帖数: 6999 | 14 【 以下文字转载自 SanFrancisco 讨论区 】
发信人: fuckthrust (...), 信区: SanFrancisco
标 题: VentureBeat 称airbnb价值要腰斩！ (转载)
发信站: BBS 未名空间站 (Fri Dec 16 15:26:39 2016, 美东)
发信人: wwzz (一辈子当码工), 信区: JobHunting
标 题: 又一个看衰气床的
发信站: BBS 未名空间站 (Fri Dec 16 14:50:20 2016, 美东)
1. Why we cut Airbnb’s valuation in half
Too many bad reviews, dropping out of first place on the “best places to
work at” list on Glassdoor, and regulatory fist fights have finally seemed
to create a noticeable impact. Google searches for Airbnb, an e... 阅读全帖 |
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s******r
发帖数: 5309 | 15 Maryam Mirzakhani, Stanford mathematician and Fields Medal winner, dies
Stanford mathematics professor Maryam Mirzakhani, the first and to-date only
female winner of the Fields Medal since its inception in 1936, died July 15
after a long battle with cancer. Mirzakhani was 40 years old.
BY ANDREW MYERS AND BJORN CAREY
Stanford mathematics professor Maryam Mirzakhani, the first and to-date only
female winner of the Fields Medal since its inception in 1936, died July 15
after a long battle with can... 阅读全帖 |
|
K******r
发帖数: 4052 | 16 看最新trajectory
已经远离miami
过keys过everglades，都是没啥人烟的地方
等再到tampa之类的地方已经没有多少能量了
目测人员与财产损失小于houston |
|
r*s
发帖数: 2555 | 17 【 以下文字转载自 Joke 讨论区 】
发信人: rbs (jay), 信区: Joke
标 题: 诺委会太不像话了
发信站: BBS 未名空间站 (Wed Oct 4 10:23:52 2017, 美东)
尼玛87篇参考文献就不能加一篇施教授或能教授的CNS？
References
1. Ruska, E., Nobel Lectures, Physics 1981-1990, Tore Frängsmyr and
Gösta Ekspong, Eds. (1993) World Scientific Publishing, Singapore
2. Marton, L. (1934) Electron microscopy of biological objects. Nature
133, 911-911
3. Althoff, T., Mills, D. J., Popot, J. L., and Kühlbrandt, W. (2011)
Arrangement of electron transport chain compone... 阅读全帖 |
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h*******i
发帖数: 4386 | 18 和前清同光中兴之后，明治27年朝鲜战争败战亡国是一个trajectory.
不同的是，这次金书记请胖子替米国人吃了清蛋。 |
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W*****B
发帖数: 4796 | 19 就是前几年在奥斯卡颁奖典礼上侮辱小黄人的那个黑不溜秋穆斯林小丑
She wanted to go slow; he wanted to go fast. She told the world. Is Aziz
Ansari a victim or a perpetrator?
The Aziz Ansari cultural moment was inevitable.
Ansari, the immensely talented actor who just won a Golden Globe for his
work on “Master of None,” has been very publicly accused of unwanted
sexual aggression during a first date by an anonymous 23-year-old woman who
met him at an Emmy after-party last year.
Her story, “I went on a date with Aziz Ansari. It tur... 阅读全帖 |
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w*********r
发帖数: 42116 | 20 人类就这么一下子突破了殖民火星。
The Tesla Roadster that launched Tuesday on the first test flight of SpaceX'
s powerful Falcon Heavy rocket is heading farther into space than expected.
The red car — along with a dummy in the driver's seat named "Starman" —
were targeting an elliptical orbit around the sun that would, at times, get
close to Mars. On Tuesday night, SpaceX Chief Executive Elon Musk tweeted
that the vehicle's trajectory had "exceeded Mars orbit and kept going to the
Asteroid Belt." |
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c****h
发帖数: 4968 | 21 尼玛，，一个个炒房、炒股、打炮、吃喝玩乐的，谁有心思去玩政治啊。而且大部分中
国人的愿望就是保持稳定，保持现在这个trajectory. 哪里像美国，跟一个普通人聊天
，只要和ta的左\右不合，都能炒得面红耳赤。现在的中国是近代史上最不关心政治的
时候。 |
|
发帖数: 1 | 22 你只顾舔屁股， 没有看到你白爹杀人是最牛逼的，
给你看看伯克利怎么杀人，
https://www.youtube.com/watch?v=ecClODh4zYk
the researchers' latest attempt to build support for a global ban on
autonomous weapon systems, which kill without meaningful human control.
They released the video to coincide with meetings the United Nations'
Convention on Conventional Weapons is holding this week in Geneva,
Switzerland, to discuss autonomous weapons.
"We have an opportunity to prevent the future you just saw, but the window
to act is closing fast... 阅读全帖 |
|
|
发帖数: 1 | 24 曾经的帝国被强摁着吃屎。。。
看来老川不吃也不行了。
In meetings over the past three weeks, Cabinet-level officials told USCBC
representatives they are putting off accepting applications "until the
trajectory of the U.S.-China relationship improves and stabilizes," Parker
said.
Chinese authorities have promised to increase foreign access to areas
including banking, securities, insurance and asset management. |
|
W*****B
发帖数: 4796 | 25 uscbc是哪里
：曾经的帝国被强摁着吃屎。。。
：看来老川不吃也不行了。
：In meetings over the past three weeks, Cabinet-level officials told USCBC
：representatives they are putting off accepting applications "until the
：trajectory of the U.S.-China relationship improves and stabilizes,"
Parker
：said.
：Chinese authorities have promised to increase foreign access to areas
：including banking, securities, insurance and asset management. |
|
发帖数: 1 | 26 In meetings over the past three weeks, Cabinet-level officials told USCBC
representatives they are putting off accepting applications "until the
trajectory of the U.S.-China relationship improves and stabilizes," Parker
said.
Chinese authorities have promised to increase foreign access to areas
including banking, securities, insurance and asset management. |
|
c*******2
发帖数: 617 | 27 美中貿易全國委員會（USCBC）表示，收到中方部長級官員的通知，中國已暫停美國公
司在金融服務及其他行業的牌照申請，直至兩國在解決貿易糾紛上取得進展。
The license delay applies to industries Beijing has promised to open to
foreign competitors, according to Jacob Parker, vice president for China
operations of the U.S.-China Business Council. The group represents some 200
American companies that do business with China.
In meetings over the past three weeks, Cabinet-level officials told USCBC
representatives they are putting off accepting applications "until the
trajector... 阅读全帖 |
|
c*********e
发帖数: 774 | 28 Spain will overtake Japan's long-held position at the top of the world's
life expectancy table, while the United States is set to take a big fall in
rankings, new research finds.
People in Spain will live for 85.8 years on average, marginally edging out
expected lifespans in Japan (85.7), Singapore (85.4) and Switzerland (85.2).
The United States will take the biggest drop in ranking of all high-income
countries, falling from 43rd in 2016 to 64th, with an average life
expectancy of 79.8.
The US ... 阅读全帖 |
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发帖数: 1 | 29 Is China Waiting Us Out?
http://www.theamericanconservative.com/articles/is-china-waiting-us-out/
While the U.S. bombs, Xi Jinping is building—one power play at a time.
By MICHAEL HORTON • October 22, 2018
Michael Hogue
The one constant in recent U.S. foreign policy—regardless of which party
occupies the White House or controls Congress—is that it prioritizes
military intervention, both covert and overt, to advance its interests
overseas. While President Barack Obama vowed to move the U... 阅读全帖 |
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l******r
发帖数: 18699 | 30 我们可以从一场数学史上极富盛名的挑战赛来比较一下牛顿和同时代其他数学家的水平。
约翰·伯努利在1696年提出最速降线的问题（problem of brachistochrone），向全欧
洲数学家征求解答。这个问题最早由伽利略在1630年提出：
“一个质点在只受重力的作用下，从一个给定点A到不在它垂直下方的另一点B，问沿着
什么曲线下滑所需时间最短？”
然而伽利略自己给出的答案是错误的：他认为这条曲线是过AB的圆弧。这条曲线也不是
连接AB两点的直线，尽管AB间线段最短，但小球滚下来的时间不是最短。
伯努利把此问题发布在Acta Eruditorum上，他还这么说：
“我，约翰·伯努利，想找到世界上最出色的数学家。对聪明人而言，没有什么能比一
道诚实而富有挑战性的难题更有吸引力，其可能的解决方案将会成为一个永恒的纪念碑
。按照帕斯卡，费马等人设定的例子，请允许我代表整个数学界将这个尤其能在今天考
验大家的数学技巧和思维耐力的问题展示在最优秀的数学家面前。如果有人能把答案递
交与我，我会将其公开，并授予其应得的奖赏。”
伯努利原定的截止期限是1696年年底，可是他只受到了一份来自他的老师... 阅读全帖 |
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c********e
发帖数: 4283 | 31 其实当年来美国 是一种鲤鱼跳龙门的成功 和国内同龄人之间的差别是数量级上的(
overwhelmingly dominant) 我是说20年前我出国的时候
但现在已经到了要横比竖比，不分仲伯的地步了 这已经说明一切了
可惜的未来的trajectory将依然保持美国消亡，中国渐盛的态势 ... |
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发帖数: 1 | 32 原来还去中文学校啊！Michelle Kwan是她偶像。对华人血统很有自豪感的女孩，放
心了！
Liu is used to the unconventional route. She and her four siblings — a 9-
year-old sister and 8-year-old triplets — were conceived through anonymous
egg donors and surrogate moms.
Oakland lawyer Arthur Liu, 53, is rearing the children with the help of his
partner and a community of friends, he said. But every day is a manic foot
race, particularly with a skater on the verge of national attention and his
busy law practice.
He rises at 4:30 a.m. to c... 阅读全帖 |
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发帖数: 1 | 33 An asteroid could destroy humanity like it did dinosaurs. A Hopkins team has
a plan to save the world.
Andy Cheng, chief scientist at the Johns Hopkins Applied Physics Laboratory
in Laurel, is co-lead investigator on the Double Asteroid Redirection Test
mission, NASA's first test of a defense mission to deflect an asteroidt by
smashing a spacecraft into it. (Kim Hariston/Baltimore Sun)
By Tim Prudente February 4 at 6:53 PM
A team of scientists, astronomers and engineers meets weekly in a confere... 阅读全帖 |
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b********n
发帖数: 38600 | 34 What is it with my white brothers, believing the myth all the Chinese brain
can do is copy Western IP, because they don't have the capacity to be as
inventive as whites? Good lord, what the **** are you monkeys thinking? Is
it comforting? Is it to score points and point the finger at the Chinks,
that we are superior?
When the Romans were building roads and aqueducts, we Brits were effectively
savages who had mastered basic building techiques. The same applies to the
Barbarians to the North of t... 阅读全帖 |
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b********n
发帖数: 38600 | 35 With current demographic trends the USA will be North Mexico by the end of
the century and it will resemble Brazil in dysfunctionality, crime and
poverty. China's demographics will be about the same and that will permit
them to continue to advance as a people while the USA tears itself apart
with multi-culturalism. You can already see how dysfunctional the USA is
today. It doesn't take a genius to see what trajectory we are on. |
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b********n
发帖数: 38600 | 36 With current demographic trends the USA will be North Mexico by the end of
the century and it will resemble Brazil in dysfunctionality, crime and
poverty. China's demographics will be about the same and that will permit
them to continue to advance as a people while the USA tears itself apart
with multi-culturalism. You can already see how dysfunctional the USA is
today. It doesn't take a genius to see what trajectory we are on. |
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b********n
发帖数: 38600 | 37 The Dark Psychic Forces of Recession
make cutting rates a true emergency.
Trump has created a monster economic collapse:
trade wars have backfired
tax cuts benefit only the wealthy
corporations invest in their own management's bonuses
military victories provide no return on investment
Trumpkins face betrayal and downward trajectory |
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发帖数: 1 | 38 Major med school exam will move to pass/fail scoring
The USMLE Step 1 examination will move from a numerical score to the simpler
binary of pass/fail in 2022. The change comes after a push from
professionals and students who argued the numerical scale played too large a
role in determining a student's education and career trajectory.
USMLE Step 1, also known as "The Boards," is the first part of the US
Medical Licensing Examination. US medical students typically take Step 1 at
the end of the sec... 阅读全帖 |
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a****2
发帖数: 3735 | 39 我们可以从多份由中国科研人员在当时的国际学术期刊所发表的论文，得以管窥，以下
是其中三份较具代表性：
1.〈Difference in Receptor Usagebetween Severe Acute Respiratory Syndrome (
SARS) Coronavirus and SARS-LikeCoronavirus of Bat Origin（源于蝙蝠的严重急性
呼吸系统综合症（SARS）冠状病毒和SARS样冠状病毒之间的受体使用差异）〉，美国微
生物学会，病毒学报，2008 年2月号
2. 〈Bat severe acute respiratorysyndrome-like coronavirus ORF3b homologues
display different interferonantagonist activities（ 蝙蝠严重急性呼吸综合征样
冠状病毒ORF3b同源物表现出不同的干扰素拮抗剂活性）〉，Journal of General
Virology, United Kingdom, 2012
3.〈Identification ofImmuno... 阅读全帖 |
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d*********o
发帖数: 6388 | 40 https://www.theatlantic.com/ideas/archive/2020/02/why-democracies-are-better
-fighting-outbreaks/606976/
Ariana A. Berengaut
Penn Biden Center’s director of programs, partnerships, and strategic
planning
China’s harsh response to the coronavirus has influential admirers, but
Western nations recognize that public health fundamentally depends on public
trust.
Good public-health practice doesn’t just require control. It also requires
transparency, public trust, and collaboration—habits of mind that... 阅读全帖 |
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d*********o
发帖数: 6388 | 41 https://twitter.com/NickKristof/status/1238618948272259073
Nicholas Kristof @NickKristof
A hospital in Seattle area has sent out a note to staff, shared with me,
suspending elective surgery and warning that "our local COVID-19 trajectory
is likely to be similar to that of Northern Italy." The hospital is down to
a four-day supply of gloves. |
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j*******n
发帖数: 3254 | 42 真悲哀， 联邦政府还是没有采取有力的行动， 来支持地方， 仅是口头通过一个紧急
状态。
trajectory
to |
|
发帖数: 1 | 43 低端人口流窜看病造成。 菌斑两名媛一并鉴定
trajectory
to |
|
c***c
发帖数: 21374 | 44 Despite now having some of the toughest measures in the world, Italian
authorities fumbled many of those steps early in the contagion — when it
most mattered as they sought to preserve basic civil liberties as well as
the economy.
Italy’s piecemeal attempts to cut it off — isolating towns first, then
regions, then shutting down the country in an intentionally porous lockdown
— always lagged behind the virus’s lethal trajectory. |
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t*****r
发帖数: 543 | 45 整个城市成了一个大毒罐子
New Orleans Faces a Virus Nightmare, and Mardi Gras May Be Why
Louisiana may be experiencing the world’s fastest growth in new cases.
Medical experts said Mardi Gras might have accelerated the crisis.
A deserted Bourbon Street in New Orleans, which has had more coronavirus
cases than all but 15 states.
William Widmer for The New York Times
By Katy Reckdahl, Campbell Robertson and Richard Fausset
March 26, 2020
NEW ORLEANS — Yanti Turang, an emergency room nurse at a New Orleans
hosp... 阅读全帖 |
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a***r
发帖数: 594 | 46 for ballistic missile, it needs 7.9km/s to reach orbit.
according to wikipedia:
"boost phase: 3 to 5 minutes (shorter for a solid rocket than for a liquid-
propellant rocket); altitude at the end of this phase is typically 150 to
400 km depending on the trajectory chosen, typical burnout speed is 7 km/s.
reentry phase (starting at an altitude of 100 km): 2 minutes—impact is at a
speed of up to 4 km/s (for early ICBMs less than 1 km/s); see also
maneuverable reentry vehicle."
assume constant acce |
|
I********n
发帖数: 1468 | 47 sniper rifle rarely uses a silencer/muffler since it changes the trajectory
of the bullet and weakens the power of the rifle as well. Unless it happens
during a fire fight, rifle shots are loud enough to be detected. Soilders
could only use muzzle flash to detect a sniper's position before. This
device definately helps. |
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s**********d
发帖数: 36899 | 48
trajectory
suppressor增加弹速。 |
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w*******g
发帖数: 9932 | 49 糊涂了. 官方网站好象说第二次engine burn了
End of the second engine firing
01:20:09.975
Mars transfer trajectory
Spacecraft exits Earth's shadow
01:33:47:996
-
reported
at
the |
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w*******e
发帖数: 15912 | 50 【 以下文字转载自 Military 讨论区 】
发信人: wsnonline (卫所南次郎-子曰：“再得瑟我削你啊！”), 信区: Military
标 题: 浅说弹道导弹打航母（转载）
发信站: BBS 未名空间站 (Thu Oct 17 12:36:20 2013, 美东)
要是96年天朝掌握此大杀器，江core下令往台海的独立号和尼米兹号甲板上扔俩
空包弹，那就爽了!
浅说弹道导弹打航母
文学城首页 » 热点讨论主题 » 网上谈兵 » 浅说弹道导弹打航母
作者 Chiyankun 于 2013-10-15 20:26:20
这个问题在几年前曾经热烈讨论过。当时张召忠将军也认为弹道导弹就是按照预定轨道
飞行不可能打航母。他说的当然是一种传统的弹道导弹，即所谓惯性制导的导弹才是这
样按照预定导弹飞行的。
那么给弹道导弹加上末端制导是不是可以打击移动目标？
有个谚语说，理论是灰色的，而生活之树长青。弹道导弹也不是一成不变的，也在不断
发展。
现在有人说，导弹速度高精度就低，弹道导弹打航母是不可能的。对于那些只相信美国
人的朋友，我不妨举一个美国的例子，... 阅读全帖 |
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