E***a
发帖数: 297 | 1 从来没在本版发帖，一直潜水，最近拿到了G和M的offer，最后选择了G。因为在本版收
益颇多，想把自己的一些经验分享一下，还一点亏欠的人品。
马上要卖房带着老婆孩子搬家了，人生挺大的一个改变。也借人气求大家的祝福。
声明：
1）没有面经。
2）没有包子。只见过人发包子，不知包子为何物。
写程序：
1）一定要多练习！尤其是基本数据结构的操作，如merge two sorted linked list,
pre/in/post order recursive/iterative tree traversal，各种binary search...
2）多练习的另一个好处是养成面试时写code的习惯，如函数名，怎么传参数，Tree或
者Linked List的node怎么写，怎么处理出错，assert还是throw exception... 这些都
不难，但是面试的时候再考虑就显得生疏了。心理上也会更紧张。我觉得www.
ihas1337code.com里面的程序写的不错，学习了很多。
3）平时的题目和code都写在一个本子上，最后面试前（我是坐飞机的时候）拿来复习
一遍效果挺好的。题目做多了... 阅读全帖 |
|
s********x
发帖数: 914 | 2 那我写一下吧
public static int findKthSmallestElementInTwoSortedArrays(int[] a, int i
, int m, int[] b, int j,
int n, int k) {
validate(a, b)；
if ( m > n) {
return findKthSmallestElementInTwoSortedArrays(b, j, n, a, i, m
,k);
} // now m <= n
// Boundary check
if (k > m + n) {
throw new IllegalArgumentException("k is too big");
} else if (k <= m) {
// cut two arrays to be both of size k b... 阅读全帖 |
|
e*******s
发帖数: 1979 | 3 stack invariant 如何理解
http://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_comp
"
When the depth-first search recursively explores a node v and its
descendants, those nodes are not all necessarily popped from the stack
before this recursive call returns. The crucial invariant property is that a
node remains on the stack after exploration if and only if it has a path to
some node earlier on the stack.
" |
|
t******l
发帖数: 10908 | 4 make 10 也看观察角度，make 10 也可以认为是 Piaget 老先生 Concrete Operation
里的 conserve (invariant)。
当然我目前的看法是直接教 unique prime factorization 一了百了，反正 unique
prime factorization 也是 conserve，因为是 invariant on factorization
structure。。。之前都可以直接跳过。。。// run
：我之前和我大学同学说我在教小孩make 10做加法. 她说她小孩是奥数才学make 10,
国内小学不教。 |
|
n*****g
发帖数: 626 | 5 尤其这段话，非常有现实意义--
“But when a long train of abuses and usurpations,
pursuing invariably the same Object, evinces a
design to reduce them under absolute Despotism,
it is their right, it is their duty, to throw off
such Government, and to provide new Guards for
their future security.”
“但是，当追逐同一目标的一连串滥用职权和强取豪夺发生，
证明政府企图把人民置于专制统治之下时，那么人民就有权利，
也有义务推翻这个政府，并为他们未来的安全建立新的保障”
为了我们的下一代，我们有权利，也有义务，在六月三日
用选票推翻加州极左民主党的倒行逆施。
http://baike.baidu.com/subview/49962/9075383.htm
=======================================... 阅读全帖 |
|
b*s
发帖数: 82482 | 6 刚才在路上，说不明白。除了那本书以外，原来在纽约客上Galdwell的文章可以给出详
细一些的例子吧：
http://www.gladwell.com/2008/2008_10_20_a_latebloomers.html
Articles from the New Yorker
Late Bloomers
October 20, 2008Annals of Culture
Why do we equate genius with precocity?
1.
Ben Fountain was an associate in the real-estate practice at the Dallas
offices of Akin, Gump, Strauss, Hauer & Feld, just a few years out of law
school, when he decided he wanted to write fiction. The only thing Fountain
had ever published was a law-review article. H... 阅读全帖 |
|
c*****e
发帖数: 757 | 7 "I had the opportunity to accidentally run a kind of halfway test on the 6D
Mark II's shadow dynamic range when shooting bracketed images of a dawn
eruption from Old Faithful, heavily backlit by the rising sun. When shadow
areas are lifted by a couple of stops, there's no obvious banding, but noise
becomes prominent, suggesting that the 6D Mark II's sensor probably isn't
ISO-invariant."
这个是dpreview的原文，non ISO-invariant的现象和佳能上一代的传感器很像。具体
怎么样还是等测评吧。
我估计DR比5D3应该还是要好的，但可能不会很多。 |
|
h*****i
发帖数: 9112 | 8 刚才去翻了一下原文，这帮人放了好多动物嘘嘘的录像在supplementary里。。。。。
copy一段作者的discussion：
Why is urination time 21 s, and why is this time constant across animal
sizes? The numerical value of 21 s arises from the underlying physics
involving the physical properties of urine as well as the dimensions of the
urinary system. Our model shows that differences in bladder capacity are
offset by differences in flow rate, resulting in a bladder emptying time
that does not change with system size. Such invariance has been observ... 阅读全帖 |
|
|
J*******g
发帖数: 8775 | 9 这是中译本的一个意译，目的是为了让读者更容易理解圣经。而英文版本没有这样翻译。
但是这个问题是很普遍的问题，google一下就可以看到解释。我这里把NET bible的解
释粘贴过来，希望您能了解的更深入。
God gave Moses a preview of all that would take place in his dealings with
Pharaoh (vv. 21-23). When God said He would harden Pharaoh’s heart (v. 21),
He was not saying that Pharaoh would be unable to choose whether he would
release the Israelites. God made Pharaoh’s heart progressively harder as
the king chose to disobey God’s will (cf. Lev. 26:23-24).
“The hardening of Pharaoh is ascribed to... 阅读全帖 |
|
K****n
发帖数: 5970 | 10 i think neither linear nor quadratic is spatial invariant
your radial basis function looks spatially invariant to me |
|
r***l
发帖数: 67 | 11 assert is much differnt.
Assert will abort your program at runtime if something goes wrong. It is a way
to complement unit testing. It is to test how your code works, and unit
testing is to test what your code does.
Normally, assert concerns about invariant - something should always be true in
your program, e.g. thread_in_pool >= 0. If the invariant is false, program
should terminate right there.
Assert is very important, but hard to use it right.
太晚
很多i |
|
w*******a
发帖数: 1458 | 12 Fixed effect means it is time invariant.
So that's why there is no correlation between v and x.
v is across i, x is both across i and t.
A time invariant variable should not be correlated with a time varying
variable, for any i.
Make sense? |
|
h**********c
发帖数: 4120 | 13 这个题不是invariant，所以没有定量答案，
首先，七匹马并列第一。
。。。
最后，全部未能完成比赛。
以上只是invariant analysis.
variant case can be:
三个月以后，一匹马，或骑师因为过量服用违禁药物被取消成绩。 |
|
s*****V
发帖数: 21731 | 14 http://site.douban.com/130104/widget/notes/5389697/note/1820952
2011-11-03 23:35:00
我想谈谈过去五十年和我预测未来一百年的代数几何,我将一次次分开讨论,如果有兴趣
请支持:
1940-1965
代数几何在1900年以前,已经有了代数曲面的部分理论和代数曲线上的Riemann-Roch定
理,但是语言和概念处于一个混乱的状态.在1950到1965年间出现了三个巨大的革命.奠
定了代数几何的秩序描述了重要的问题,提供了未来发展的方向.她们是Hodge(加一堆人
)开创复几何, Kodaira的三大工作和Grothendieck的抽象语言及新定义(问题):
让我先讲第一项工作.
Hodge+Lefschetz+Kaehler考虑了复流形的定义和一般的性质,Kaehler引入了Kaehler度
量,Hodge利用了分析中着名的Elliptic regularity对Kaehler流形的上同调群作了至今
仍然神秘的Hodge分解,并且提出着名的Hodge猜想,Lefschetz证明了Hodge猜想的非常特
殊情形... 阅读全帖 |
|
L*m
发帖数: 235 | 15 最近十年在annals of mathematics上发表或合作发表文章的华人全统计（不包括
terrence tao和一位mit本科毕业的abc华人），单位统计以现在作者单位为准
annals
2015年
A proof of Demailly’s strong openness conjecture
关启安（北京大学） 周向宇（中科院）
A solution of an L2 extension problem with an optimal estimate and
applications
关启安（北京大学） 周向宇（中科院）
Finsler metrics and Kobayashi hyperbolicity of the moduli spaces of
canonically polarized manifolds
杨世琪（普渡大学） Wing-Keung To（新加坡国立大学）
Construction of Cauchy data of vacuum Einstein field equations evolving to
black holes
黎俊彬（中山大学）... 阅读全帖 |
|
x********i
发帖数: 905 | 16 http://iccm.mcm.ac.cn/dct/page/1
Plenary Lectures
Group 1
Wei Zhang: RTF and L-functions
Kai-Wen Lan: Cohomology of automorphic bundles
Xinyi Yuan: On Faltings heights of CM abelian varieties
Jing Yu: On Linear Independence of Logarithms
Xuhua He: Cocenter of Hecke algebras
Jiu-Kang Yu: A GAGA theorem for p-adic groups
Jianya Liu: Manin's conjecture for a class of singular cubic
hypersurfaces
Lei Fu: Rigidity of $ell$-adic Sheaves
Si Li: Open-closed topologica... 阅读全帖 |
|
z**********g
发帖数: 16 | 17 bout “Repulsive particle” hypothesis
Zhuang Yilong
Shanghai Institute of Science and Technology Managemen
Jiading 201800
“Repulsive particle” hypothesis is a new theory of material
action. Contrary to Newton law of universal gravitation, which explains why
an apple on the three falls to the ground, it can be called law of universal
repulsion which explains why an apple grows on the tree. It regards a plank
quantum as a material particle, which is a epulsive particle”
counter... 阅读全帖 |
|
z**********g
发帖数: 16 | 18 Repulsion Particle Hypothesis
: Zhuang Yilong
Shanghai Institute of Science & Technology Management
Jiading District of Shanghai, 201800, China
Abstract: The theory of “ Repulsion Particle Hypothesis” is a new theory
of matter interactions. In contrast to Newtons universal gravitation that
the apple drops from the tree, this hypothesis can be called the universal
repulsion theory tha... 阅读全帖 |
|
发帖数: 1 | 19 量子的，正是因为量子修正ising model才能得到scale invariant的critical point来
描述临界现象，classical的ising model的Lagrangian并不是scale invariant的。 |
|
D**u
发帖数: 204 | 20 I think so. If the curve C is fairly (piecewise) smooth/differentiable, at
each point on the contour let "theta" be the angle of the tangent line.
We can define
F(C) = \integrate g(theta) ds
This question is related to (and different from) a concept called "intrinsic volume" which is also finite additive but not countable additive. The difference is: intrinsic volume is invariant under rigid motions (combinations of rotations and translations), while the construction of F is only invariant under |
|
k*****y
发帖数: 744 | 21 Q2.18 Suppose we price a digital call in both normal and lognormal models in
such a way that the price of call option with the same strike is invariant.
How will the prices differ?
the price of call option with the same strike is invariant是什么意思？
解答也没看懂，哪位来稍微解释一下？谢谢~ |
|
k*****y
发帖数: 744 | 22 Q2.18 Suppose we price a digital call in both normal and lognormal models in
such a way that the price of call option with the same strike is invariant.
How will the prices differ?
the price of call option with the same strike is invariant是什么意思？
解答也没看懂，哪位来稍微解释一下？谢谢~ |
|
k*****y
发帖数: 744 | 23 Sorry, I was wrong. It is not invariant in general. The correct statement
should be:
If the combination is {0,1,2}, then it is invariant under any move.
the |
|
B****t
发帖数: 6 | 24
energy is not invariant, it changes in different frame, like momentum.
what is invariant is m^2=E^2-p^2. |
|
t********n
发帖数: 1 | 25 I know the problem is not so complicated, but I just can't do it :(((
Please Help me !!!!
establish fundamental relations
1) Establish temporal translation invariance.
If f(t+t0, t'+t0) = f(t,t')
for all time t and t' given some value of t0, where f(t,t') and its
derivatives of all orders are continuous in t and t', show
f(t,t')=f[t-t']
2) Establish spatial translation invariance
IF f(x+x0,x'+x0)=f(x,x')
for all space x, x', give f(x,x') and its derivatives of all orders
are continuous. show
f(x |
|
S*********g
发帖数: 5298 | 26 Under a Poincare transformation, an electron is still an electron. It
will not
be transformed into a spin-1 particel. This is the meaning of the
invariant.
Your second question is also related to this invariant.To answer it,
let's talk about the spinor representaion of the Poincare group, which
can be used to describe an electron.
For an electron, you can use a spinor (A1, A2, A3, A4) to describe an
electron as you learned in the Dirac equation in Quantum Mechanics.
Under the Poincare transforma |
|
w*z
发帖数: 71 | 27 PCA is not scale-invariant. using cov and corr matrices leads to different
results. the difference depends on the scale of the original data.
corr matrix is generally employed to get rid of the lack of scale-invariance. |
|
f**d
发帖数: 768 | 28 这是一本计算神经科学的优秀著作，全文拷贝这里（图和公式缺），有兴趣的同学可以
阅读
如需要，我可以分享PDF文件（－－仅供个人学习，无商业用途）
From Computer to Brain
William W. Lytton
From Computer to Brain
Foundations of Computational Neuroscience
Springer
William W. Lytton, M.D.
Associate Professor, State University of New York, Downstato, Brooklyn, NY
Visiting Associate Professor, University of Wisconsin, Madison
Visiting Associate Professor, Polytechnic University, Brooklyn, NY
Staff Neurologist., Kings County Hospital, Brooklyn, NY
In From Computer to Brain: ... 阅读全帖 |
|
c*********d
发帖数: 9770 | 29 张春桥：论对资产阶级的全面专政（On Exercising All-Round Dictatorship Over
the Bourgeoisie）
无产阶级专政问题，是长期以来马克思主义同修正主义斗争的焦点。列宁说“只有承认
阶级斗争、同时也承认无产阶级专政的人，才是马克思主义者。”
THE question of the dictatorship of the proletariat has long been the focus
of the struggle between Marxism and revisionism. Lenin said, “Only he is a
Marxist who extends the recognition of the class struggle to the recognition
of the dictatorship of the proletariat.” And it is precisely to enable us
to go by Marxism and not revisionism in both theory an... 阅读全帖 |
|
c**i
发帖数: 6973 | 30 Geoff Dyer, Price Rises Put Beijing on Alert; News Analysis; Fear grows that
increases in food costs could be the harbinger of further inflation
pressures. Financial Times (FT), Nov. 20, 2010.
My comment:
(a) Ft allows ten free viewing of reports a month, after registration.
Somehow this report does not require registration. So enjoy it while it
lasts.
(b) In the print, there is an illustration of two panels.
(i) Headlined "On the rise," the left panel has three figures:
62.4% Price increaseof ... 阅读全帖 |
|
c**i
发帖数: 6973 | 31 Most Americans have not heard of Lang Lang, or his playing piano in White
House. But many--they are supporters of Pres. Obama; a majority of
Massachusetts voters are--are angry they know many of their friends and
relatives who are laid off and that China steals all those jobs (
manufacturing job, that is), by artificially lowering exchange rate of
China's and America's currencies. This is something Chinese need to address-
-urgently. (Fortunately for Taiwan, Americans do not even think of Taiwa... 阅读全帖 |
|
w**t
发帖数: 3247 | 32 俺就顺便问个物理问题吧。为了和历史有点联系，俺做一下说明：为了学习关老爷夜读
春秋，俺闲着没事夜读朗道的那套书里的经典力学。突然发现他有一个没有explicitly
说明的假设，就是Lagrangian是以空间中的位置（而不是某个坐标系下的位移矢量）和
时间（绝对时间）为变量的函数。与参照系的选择无关。也就是说Lagrangian是参照系变
换下的invariance,不管是不是惯性系.那么Principle of least action, 也是和参照新
无关的。这么理解没问题吧？那个QED，还有老Cor过来看看？给俺答答疑？ |
|
w****j
发帖数: 5581 | 33 罗素的西方哲学史也不是什么难找到书。我就贴一下好了：
... Against the more insane forms of subjectivism in modern times there have
been various reactions. First, a half-way compromise philosophy, the
doctrine of liberalism, which attempted to assign the respective spheres of
government and the individual. This begins, in its modern form, with Locke,
who is as much opposed to ‘enthusiasm’-the individualism of the
Anabaptists-as to absolute authority and blind subservience to tradition. A
more thorough-going revolt leads to... 阅读全帖 |
|
b*****d
发帖数: 271 | 34 现在的粒子物理理论把除了引力之外基本相互作用都放到一个framework里，
现在的难题是如何量子化引力。 这些工作的发展，这些年受到实验技术的限制，目前
只有LHC， 能标只能达到14 TeV ( ~1.4 * 10^4 GeV ) ，而引力对应的普朗克能标则
是10^19 GeV。在相当长的一段时间内， 大统理论得不到实验的支持。
但在其他理论，也有很多发展，特别是宇宙学。
近些年来的热点就是暗物质，科普一下最近的实验吧，
背景：pamela测到宇宙中GeV的正电子反常(arXiv:0810.4995)， 作为反物质， 密度应
该随着能量的增加而下降， 但是目前实验测到正电子的密度在GeV附近有反弹(图见Fig
4 of arXiv:0810.4995)。目前流行的观点是， GeV的暗物质湮灭产生正电子，所以
GeV能标附近正电子密度增加。
1) 现在大家都去galaxy中心找暗物质湮灭产生的gamma射线， Rouven提议去dwarf
galaxies里去找gamma射线(arXiv:0902.4750)。point是dwarf galaxies不发光， 背景
很小，实验上好测... 阅读全帖 |
|
m*****a
发帖数: 92 | 35 Arab Terrorist Attacks Jerusalem's Merkaz HaRav Yeshiva: 8 Dead
by Nissan Ratzlav-Katz and Hillel Fendel
Follow Israel news on Twitter and Facebook.
Warning: this article includes graphic content. Click here for the no-photos version.
An Arab terrorist infiltrated Jerusalem's Merkaz HaRav Yeshiva at around 8:30 Thursday night and murdered eight Jews. At least 10 students were wounded, including five in serious to critical condition.
Five of the dead were high school students in Merkaz Harav's Ye... 阅读全帖 |
|
c**i
发帖数: 6973 | 36 Stephen Brumwell, The House Impregnable; Medieval fortresses that today seem
picturesque were built as instruments of domination. Wall Street Journal,
Apr 16, 2011.
http://online.wsj.com/article/SB10001424
052748704471904576228484203247462.html
(book review on John Goodall, The English Castle. Yale Univ Press, 2011)
Note:
(a) Portsmouth
http://en.wikipedia.org/wiki/Portsmouth
(in Hampshire county; for name origin, see section 1 History: (i) "mouth of
the Portus harbour" thanks to Portus Adurni a... 阅读全帖 |
|
s*******w
发帖数: 2257 | 37 独立节读《独立宣言》 (2016-07-05 14:18:58)
美利坚合众国第二百四十个独立节之日，重温了一下当时美国立国时杰弗逊起草的《独
立宣言》。
每读一次就不得不再次感慨当时立国之父们的英明及远见。他们在北美这块土地上，抛
弃了大不列颠的君王统治，建立起美利坚这样一个伟大的国家。
一切似乎都是上帝赐予的：这块土地上不仅有雄伟壮观的东部阿普拉契山脉及西部的落
基山脉，而且有着从广袤无际的大草原到美丽宽阔的大海洋，这富绕的土地难道不是一
种恩赐吗？是的，不过上帝恩赐给地球的土地也不仅限于美利坚，算算美利坚的土地面
积，即使现在也只位于全球第三或第四，为何美利坚却成了人们向往的地方呢？
作为移民，也许比这儿生长的美国人有更多的比较。一个感悟是当年《独立宣言》的基
石，即人人生而平等（all men are created equal)，天赋给个人的权力等不能受到侵
犯，这包括生命权（Life），自由权(Liberty)及追求幸福的权力（Pursuit of
happiness)。先父们没有意愿创建一个皇权帝制，没有意愿让政府来统治人民。他们的
智慧是政府是为保障人们的安全与幸福而建... 阅读全帖 |
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T**********r
发帖数: 1223 | 38 http://web.stratfor.com/images/writers/CHINA_RARE_EARTH_ELEMENTS.pdf?fn=9617327557
China and the Future of Rare Earth Elements
October 14, 2010
clip_image002
STRATFOR
PDF Version
* Click here to download a PDF of this report
A recent diplomatic spat between China and Japan has heightened territorial
tensions and called attention to China’s growing forcefulness with foreign
powers. One of the more intriguing aspects of this development was China’s
suspension of the export of “rare ea... 阅读全帖 |
|
c**i
发帖数: 6973 | 39 (1) J-20 Flies Off Into Uncertainty. Strategy Page, Jan 14, 2011.
http://www.strategypage.com
/htmw/htairfo/articles/20110114.aspx
My comment:
(a) The article states, "Of the four stealth fighters than [sic; should be '
that'] have been built and flown so far (U.S. F-22 and F-35, Russian T-50
and I.42), the J-20 looks most like the I.42, a MiG project that was
cancelled in 1997.
Presumably this is because the previous F-111 and F-117 also served as a
bomber.
(b) Regrading I.42. I search the web.... 阅读全帖 |
|
d********y
发帖数: 6566 | 40 时代不同了。13年前，江总访美的时候，小克也像今天小奥这样热情接待过老江，可那
时候，美国人是居高临下，把中国当小学生看待，时不时会指点指点、训导训导。而眼
下胡总访美，却让很多美国人心里酸酸的，也说不出是高兴还是难受，反正不太自在吧
。按理说，胡总来一趟，就签了四五百亿的商业合同，美国人应当高兴才对。可当他们
把美国和中国的现况一比，比出差距了，比得不那么自信了，甚至不只是不自信，而是
有点不知所措，有些失落感了。这不，我下面要向大家介绍的这篇文章，作者干脆认输
了。连搞资本主义也干不过中国，那美国人还有什么值得骄傲的呢？
（声明，为了方便，这里采用意译加趣译）
Why China Does Capitalism Better than the U.S.
By Tony Karon
始于2008年的全球经济衰退，让我们看到一个最据伟大讽刺意义的事实，即共产党统治
的中国，竟然比我们美国的民选政府，更会应负和处理资本主义的危机。中国的经济刺
激方案，开支比俺们的还要大，对抗经济衰退的效果也好得多啊。他们的钱大多用在建
设基础设施，从而进一步奠定了将来经济发展的基础。你看看他们建了多少楼... 阅读全帖 |
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p******u
发帖数: 14642 | 41 http://www.dailypioneer.com/312884/Gadkari%E2%80%99s-Orient-Exp
Gadkari’s Orient Expedition helps bridge trust deficit
January 24, 2011 6:54:41 AM
Ashok Tandon | Beijing
The Chinese envy five things in India — fluency in the English language,
Information Technology (IT), free media, religiosity and Bollywood films.
What they dislike is India trying to catch up with them in the race to
become world’s economic superpower. The two neighbours have certain things
in common too — corruption, inflati... 阅读全帖 |
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p******u
发帖数: 14642 | 42 The Chinese are crazy about Bollywood films. The middle-aged people watch
Hindi moves with Chinese subtitles. Stage performances by Indian film stars
across China are invariably sold out in advance. The Chinese authorities
have limited official import of foreign films to 40 a year but the
Pakistanis in China are a major source of Hindi film DVDs (which they get
from Dubai).
这妓者比我鳖的还二 |
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t*******h
发帖数: 2882 | 43 大意：
世界粮农组织警告，中国干旱将迫使世界最大小麦生产者（中国）大量进口谷物，使得
市场价格创纪录的攀升。
埃及起义的根本原因，是中国：亚洲的繁荣造成了对谷物的空前需求。
40%的埃及人每天生活费低于2刀--甚至比加沙地带的人害穷。
食品的上涨加重了埃及人对现政权的不满。
埃及不能像中国在1949年一样搞土改，一切已经太晚了。
http://www.atimes.com/atimes/Middle_East/MB10Ak02.html
Chinese weather on Tahrir Square
By Spengler
The late novelist James Clavell had a tiresome habit of driving the plots of
his potboilers into cul-de-sacs, whence he would extricate them with a
natural disaster.
Egypt had its Clavell moment on February 8 when the Food and Agricul... 阅读全帖 |
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c*******2
发帖数: 617 | 44 好文欣赏
关键点： 为了避免民主轮胡搅蛮缠， 作者迅速从中印对比转向印孟对比。
从印度能否追上中国的伪问题， 反问“印度能追上孟加拉国吗”
I was awakened early one morning recently by someone who said he was
enormously enjoying my on-going debate on economic growth in India. I was
very pleased that I had given someone some joy, but I also wondered what on
earth he could be talking about, since I have not been involved in any such
debate. As it happens, I am getting a steady stream of telephone calls and
electronic communication about this alleged debate. Since I ... 阅读全帖 |
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g**1
发帖数: 10330 | 45 http://www.nytimes.com/2011/03/27/world/asia/27india.html
Rapes of Women Show Clash of Old and New India
By LYDIA POLGREEN
Published: March 26, 2011
GHAZIABAD, India — The young lovers met at a secluded spot next to a
field of wheat at the edge of this sprawling suburb of New Delhi, where
the timeless India of mustard fields and bullock carts abuts the
frantically rising apartment towers of the budding middle class. They
went seeking solitude, but instead found themselves at the violent cusp
of ... 阅读全帖 |
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t******t
发帖数: 15246 | 46 应该还没有相关报道，论文原文在这里
http://arxiv.org/abs/1104.0699
“We report a study of the invariant mass distribution of jet pairs produced
in association with a W boson using data collected with the CDF detector
which correspond to an integrated luminosity of 4.3 fb^-1. The observed
distribution has an excess in the 120-160 GeV/c^2 mass range which is not
described by current theoretical predictions within the statistical and
systematic uncertainties. In this letter we report studies of the properties
of this... 阅读全帖 |
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w*********g
发帖数: 30882 | 47 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展的极限。目前虽然涌现出一些
新型航空发动机技术，但仍然没有走出依靠压力膨胀过程来实现热功转换的思路。他强
调，人们应该另辟蹊径，寻找其他可用的工作原理。为此，他研究了自然界龙卷风的形
成与强化机制，发明了一项称为"余热增推"的技术，直接利用龙卷旋涡实现热功转换并
提取... 阅读全帖 |
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a****a
发帖数: 5763 | 48 thats why I see u knew nothing
einstein said there was no gravity , only curved space-time
and its galileo told physics law is invariant in different inertial frame,
while einstein told us even in non-inertial system, it is the same case,
but
u have to put all equations in tensor form |
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E*V
发帖数: 17544 | 49 【 以下文字转载自 WorldNews 讨论区 】
发信人: EUV (奶特都是卖国贼), 信区: WorldNews
标 题: read this carefully!
发信站: BBS 未名空间站 (Sun May 29 00:08:46 2011, 美东)
http://www.nytimes.com/2011/05/29/us/29surveillance.html?_r=1&h
AUSTIN, Tex. A fat sheaf of F.B.I. reports meticulously details the
surveillance that counterterrorism agents directed at the one-story house in
East Austin. For at least three years, they traced the license plates of
cars parked out front, recorded the comings and goings of residents and
guests and, i... 阅读全帖 |
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O**n
发帖数: 649 | 50 AUSTIN, Tex. — A fat sheaf of F.B.I. reports meticulously details the
surveillance that counterterrorism agents directed at the one-story house in
East Austin. For at least three years, they traced the license plates of
cars parked out front, recorded the comings and goings of residents and
guests and, in one case, speculated about a suspicious flat object spread
out across the driveway.
“The content could not be determined from the street,” an agent observing
from his car reported one day in 20... 阅读全帖 |
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