H**E
发帖数: 620 | 1 the equation you used was for vertical flow only.
so strictly say, that equation can only apply for vertical(upward) exit
gradient(magnitude).
if you want to consider total exit gradient, you need to decompose the total
exit gradient into horizontal and vertical components.
for horizontal component, the critical exit gradient can no longer
calculated by the equation you mentioned. |
|
l*****y
发帖数: 5 | 2 Hello, all,
If I have several positive-definite matrices, which are correlated to
each other somewhat. For each one, I can apply SVD separately for
sure. Now, my question is: if I would like to find a sort of common
eigen basis for all these matrices, applying same idea of SVD, i.e.,
decompose each of these matrices simultaneously on a "common" set of
eigen-basis, can I do that? Is there such algorithm available for
this purpose?
Thanks in advance, |
|
w*****g
发帖数: 47 | 3 How to make draws which follow multivariate normal distribution? used the
subroutine to decompose the covariance matrix into cholesky factor. but can
not guarantee the matrix is positive definite. is all covariance matrix
positive definite? |
|
F****r
发帖数: 345 | 4 My understanding is you need to run a regression of A on B to find the
relationship between A and B.
Think about this: the stock price of Microsoft (A) probably will affect
market index (Z); the stock price of Coca-Cola (B) will also affect market
index (Z). Yet the stock price of Microsoft and Coca-Cola are unlikely
correlated.
Or think it this way: you may decompose Z into two parts, Z1 and Z2. Z1 is
correlated with A; Z2 is correlated with B. If Z1 and Z2 have no overlap (in
information), A a |
|
j**********e
发帖数: 442 | 5 American Economic Review
Vol. 96, No. 1, March 2006
Why Beauty Matters
Markus M. Mobius and Tanya S. Rosenblat
American Economic Review, 96(1): 222–235.
Abstract
We decompose the beauty premium in an experimental labor market where "
employers" determine wages of "workers" who perform a maze-solving task.
This task requires a true skill which we show to be unaffected by physical
attractiveness. We find a sizable beauty premium and can identify three
transmission channels: (a) physically attracti... 阅读全帖 |
|
G****n
发帖数: 145 | 6 Between trust and control: Developing confidence in partner cooperation in
alliances
[PDF] from cuny.edu…, BS Teng - Academy of management Review, 1998 - JSTOR
Strategic alliances have been recognized as arenas with potential for
opportunistic behavior
by partners. Hence, a firm needs to have an adequate level of confidence in
its partner's
cooperative behavior. In this article we examine the notion of confidence in
partner ...
Cited by 1749 - Related articles - BL Direct - All 9 versions
A reso... 阅读全帖 |
|
p**o
发帖数: 197 | 7 John Nash's contribution is obviously bigger than Shapley. Nash proved the
existence of an equilibrium in 1950. von Neumann and Morgenstern was not
able to prove the existence of an equilibrium in their 1944 book (the
publication of this book is viewed as the start of game theory even though
von neumman made some important contributions in the 1920s and 1930s). Von
Neumann solved the case when there are only two players. When there are
more than two players, they tried to decompose a multi-p... 阅读全帖 |
|
m*****y
发帖数: 67 | 8 To periodic signals, you can always decompose the signal into
a sum of sine and cosin waves. So, the conclusion still hold.
time domain analysis done in frequency domain is just
superimpose the response of each hamonics in steady state.
(provide the system is stable!!!!)
For example, a signal of y=5sint+3sin2t+4sin3t is not a sine
signal, but:
you can find amplitude and phase shift for each of the sine, and
put them together to get the steady state response of the system.
if you are doing it in |
|
c***4
发帖数: 57 | 9 intel已经找到同学内推了
还投了broadcom和qualcomm的几个职位
求内推
主要经历
Power Gating QDI Stateless Systems
September 2010 – Present
Quantified reset timing assumption and proposed an algorithm to shorten the
wake-up latency of power-gated QDI systems
Simple Asynchronous Microprocess (SAM)
September 2011 – December 2011
Described SAM using Communicating Hardware Processes (CHP) and decomposed it
into logic gates
QDI SPI Master Controller
May 2012 – September 2012
Designed a QDI Serial Peripheral Interface (SPI) master... 阅读全帖 |
|
x*******6
发帖数: 994 | 10 借人气求论文
Citation: Transactions of the ASABE. Vol. 46(3): 725?30 . @2003
Authors: C. Maneerat, Y. Hayata, N. Egashira, K. Sakamoto, Z. Hamai, M.
Kuroyanagi
PHOTOCATALYTIC REACTION OF TIO2 TO DECOMPOSE ETHYLENE IN FRUIT AND VEGETABLE
STORAGE
请发至z************[email protected] |
|
x*******6
发帖数: 994 | 11 来自主题: Environmental版 - 求论文 借人气求论文
PHOTOCATALYTIC REACTION OF TIO2 TO DECOMPOSE ETHYLENE IN FRUIT AND VEGETABLE
STORAGE
Citation: Transactions of the ASABE. Vol. 46(3): 725?30 . @2003
Authors: C. Maneerat, Y. Hayata, N. Egashira, K. Sakamoto, Z. Hamai, M.
Kuroyanagi
请发至z************[email protected] |
|
s*******1
发帖数: 135 | 12 Dried grass clippings mixed into garden soil gradually decompose, providing
nutrients for beneficial soil bacteria. This results in better-than-average
plant growth. Yet mixing fresh grass clippings into garden soil usually
causes pooer-than-average plant growth. which one of the following, if true,
most helps to explain the difference in plant growth described above?
C. Some dried grass clippings retain nutrients originally derived from
commercial lawn fertilizers, and thus provide additional e |
|
y****u
发帖数: 50 | 13 how to run its DSC?
very strange: Tm=230, but decomposes just above 100. how is the Tm obtained? |
|
r******0
发帖数: 2753 | 14
So, you did 100nm period grating PMMA line. Guess done by nanoimprint or EPL,
right?
First, check if it is still 100nm period. if not, God! you absolutely find
something new. If the edges are still sharp, I would say no decomposition,
although PMMA is easy to decompose under e-beam. The most possible reason, I
think, is you didn't check exactly the same place in two scans. Just do the
SEM again and check more places to see if all the lines are swollen. It is
normal that those long lines are not |
|
b*****h
发帖数: 29 | 15 this is a tough question.
normally you can all information if being comercial samples.
all the others make no sense about decompose T.
You can using thermal dynamic cal get ceiling T and so on.
But concerned about its dynamic nature and unknown cata inside, it is so hard
to get right information.
some times the Distri and Mn are unknown.
while not do DSC under the same condition? |
|
c*s
发帖数: 2145 | 16 once AIBN decompose to release radicals, it will be trapped by CTA and this
is the basis for raft. |
|
f******k
发帖数: 297 | 17 decompose the correlation matrix and take linear transform of independently
generated random variables.
求 |
|
z*****a
发帖数: 17 | 18 可以说得再详细一些吗？现在correlation coefficient 只是一个具体的数，如何
decompose matrix? what do u mean by linear transform of random variables?
Thank you very much |
|
z*****a
发帖数: 17 | 19 如何用已知的correlation coefficient 产生随机数列，使得数列中的每两个数都服从这
个已知的correlation coefficient? 有人说 decompose correlation coefficeint
matric, then linear transform of random variables? 但是我不清楚如何做，请明白
的大虾多多指点，多谢 |
|
c*****e
发帖数: 238 | 20 sorry for the confusion.
I think one should still decompose u(s,t)=u(s,0)+u~(s,t)
then the differential equation can be transformed into equations for u(s,0)
and u~(s,t) respectively with given boundary conditions u~(s,0)=0.
Try to solve these two functions separately. |
|
s***n
发帖数: 9499 | 21
Triangle
1 + 2 + ... + n = C(n+1, 2)
Which is the combination of choose 2 from n+1.
Think geometrically, you can decompose the
1^2+2^2+3^3+....+n^2 to two tetrahedrals, thus
1^2+2^2+3^3+....+n^2 = C(n+2, 3) + C(n+1, 3)
=n(n+1)(2n+1)/6.
done |
|
b*****n
发帖数: 78 | 22 谢谢各位的答复。我是学工程的，数学相对弱点。
我今天找了些generalized eigenvalue problem方面的书，发现答案是B^{-1}*A的最大
eigenvalue.
有个问题需要继续请教：
为什么要用 cholesky decomposion, B=GG'? 这样可以吗？
f(x) = X(x)/Y(x),
where X(x) = (Px)^{T} P^{-T}*A*P^{-1} *(Px)
and Y(x) = (Px)^{T}*(Px),
where P = P^{T} = B^{1/2}.
令 y=Px, 这样的答案是P^{-T}*A*P^{-1}的最大eigenvalue
谢谢 |
|
H****h
发帖数: 1037 | 23 For example, n=1, X is a plane; m=1, M is a line passing through 0.
And we assume that M is the x-axis.
Now you decompose the plane X into horizontal lines, one of which is M.
You view each line as a single point. You can define sum of two lines, which
is gives another horizontal line. Likewise, you have scalar product of a
line.
So you get a linear space, which is called X/M. And M is the "0" of X/M. |
|
n*s
发帖数: 752 | 24 I have a matrix and it turns out
if lambda is eigenvalue, 2-lambda is also eigenvalue
is this a kind of symmetry? does it help solving the eigenvalue problem?
for example, does this property help in decomposing the matrix? |
|
|
B****n
发帖数: 11290 | 26 我們就從你說的小波談起巴
假設你能完全讀懂Daub的小波十講 那你的數學 至少在分析上 有一定的基礎了
因為裡面measure theory, Fourier級數和轉換, 還有一部分的泛函分析都有用到
我自己只讀了一部分
我只是覺得奇怪的是你既然讀了 你的一些想法我就不能理解了
比方說小波理論本身也是L2函數空間的逼近 這就是無限維的東西阿 你怎麼一開始就說
"為什麼數學家要弄無限維呢"
小波理論中的奠基工作之一 1989年的multiresolution analysis的工作 也是無限維的
線性空間在做decompose 他給出建立orthonormal wavelet bases的條件 也是基於數學
的理論阿 這個結論既是好的理論 也在應用上對如何廣泛的建立bases有很深的刻畫
我到不是完全不認同你的一些想法 但任何事情太絕對常不是好事 這個道理也可以從許
多物理學家對世界的改變的歷史中學到 |
|
B****n
发帖数: 11290 | 27 我們就從你說的小波談起巴
假設你能完全讀懂Daub的小波十講 那你的數學 至少在分析上 有一定的基礎了
因為裡面measure theory, Fourier級數和轉換, 還有一部分的泛函分析都有用到
我自己只讀了一部分
我只是覺得奇怪的是你既然讀了 你的一些想法我就不能理解了
比方說小波理論本身也是L2函數空間的逼近 這就是無限維的東西阿 你怎麼一開始就說
"為什麼數學家要弄無限維呢"
小波理論中的奠基工作之一 1989年的multiresolution analysis的工作 也是無限維的
線性空間在做decompose 他給出建立orthonormal wavelet bases的條件 也是基於數學
的理論阿 這個結論既是好的理論 也在應用上對如何廣泛的建立bases有很深的刻畫
我到不是完全不認同你的一些想法 但任何事情太絕對常不是好事 這個道理也可以從許
多物理學家對世界的改變的歷史中學到 |
|
D**o
发帖数: 2653 | 28 注意作者 \author{YHBKJ}
Atiyah-Bott Localization 1
2012-09-05 09:24:19
\documentclass[a4paper,12pt]{article}
\usepackage{amsfonts}
\usepackage{amsmath,amsthm,amssymb}
\usepackage{CJK,graphicx}
\usepackage{amscd}
\usepackage{amssymb}
\newtheorem{theorem}{Theorem}[section]
\newtheorem{corollary}{Corollary}[section]
\newtheorem{definition}{Definition}[section]
\newtheorem{lemma}{Lemma}[section]
\begin{document}
\title{\textbf{\Huge{Atiyah-Bott Localization 1}}}\author{YHBKJ}\date{}\
maketitle
\begin{ab... 阅读全帖 |
|
t*****n
发帖数: 1589 | 29 its after I found I'm not that interested, not that talented, that I no
longer go to lectures.
I could have changed my major and went to CS affter my year 1,
retrospectively , by then, I was still thinking the univerity is for
pursuing true knowledge.
Do I regret, I never learnt how to regret.
there are many things I don't know.
I'm not able to spit. I never learnt how to spit.
I could only barely use chopsticks since very junior time.
I dont understand when I first learnt physics why a force... 阅读全帖 |
|
p**o
发帖数: 197 | 30 "也许你听说过约翰·纳什关于经济学的均衡理论的著名工作。他建立了一些简单
的
假设并由此推导出重要的结论。由于这项工作，他获得1994年诺贝尔经济学奖。
约翰·纳什将博弈论应用于经济学，并引入新的均衡概念，他改革了亚当·史密
斯
（1723年—1790年）的经典理论。他和其它经济学家将这些新兴的数学理论应用于经济
学的研究，影响至今。 "
It is commonly believed that the publication of von Neumann and Morgenstern'
s book "Theory of game and economic behavior" in 1944 is the start of game
theory. However, they only proved the existence of an equilibrium for two
player games (the minimax theorem). When there are more than two players,
they tried to decomp... 阅读全帖 |
|
n**********n
发帖数: 8 | 31 尊敬的大牛们,
I am working on a research project which decomposes arrival data into its
constituent sinusoidal waves of varying frequencies using spectral analysis.
I don't know much about Fourier transformation. I wonder if you have
experience in this(Matlab or just concept wise). I am happy to compensate
for your time at hourly basis.
非常感谢您的帮助! |
|
i***s
发帖数: 104 | 32 经常在一些paper里看到reflux这个词，但是不知道是什么意识，希望高人能指点一下。
比如：Two hundred milliliters of the calcium/EDTA/phosphate solution at the
mentioned pH values were refluxed until the production of precipitate was ob
served. 这里这个reflux到底是个什么样的操作？还有：。。。。decomposing XX und
er reflux conditions. 这个under reflux condition到底是是个什么condition?
谢谢了 |
|
x*******6
发帖数: 994 | 33 借人气求论文
PHOTOCATALYTIC REACTION OF TIO2 TO DECOMPOSE ETHYLENE IN FRUIT AND VEGETABLE
STORAGE
Citation: Transactions of the ASABE. Vol. 46(3): 725?30 . @2003
Authors: C. Maneerat, Y. Hayata, N. Egashira, K. Sakamoto, Z. Hamai, M.
Kuroyanagi
请发至z************[email protected] |
|
t***3
发帖数: 100 | 34 In synthesis, it is protected by long ligand,so it is stability is
significantly improved.CdSe,by my guess, won't decompose if is simply heated
up to 300C. Acid is more corrosive. |
|
h*****t
发帖数: 1226 | 35 You have your evedience and thoughts.
However, certain protein/antibody are very sensitive to the buffer condition,
your protein maybe decomposed or aggreated in the solution. A clear band
of the light chain and heavy chain on the reducing gel is not solid enough
to draw conclusion.
antibody
as |
|
n*s
发帖数: 752 | 36 【 以下文字转载自 Mathematics 讨论区 】
发信人: nos (redemption), 信区: Mathematics
标 题: matrix eigenvalue question
发信站: BBS 未名空间站 (Tue Jun 3 09:54:44 2008), 转信
I have a matrix and it turns out
if lambda is eigenvalue, 2-lambda is also eigenvalue
is this a kind of symmetry? does it help solving the eigenvalue problem?
for example, does this property help in decomposing the matrix? |
|
k***a
发帖数: 22 | 37 LongWayTooGo:
#2 question can be decomposed into a spread option (on two options, which has analytic solution) + an underlying option (which is plain vanilla).
PDE is a bit complicated (because of the correlation between two underlying
options, is differrent from the correlation between two underlying prices themselves). If strike 1 <> strike 2, I think no analytic solution (but I am not so sure). |
|
K*****Y
发帖数: 629 | 38 callable bond can be decomposed into (par floater) + (payer swaption).
the strike on the payer swaption depends on both the coupon rate and the
spread over LIBOR. So you only need to be able to price the swaption in
order to back out the coupon rate since you already know the spread.
If you want to consider default risks more seriously, then this can be more
tricky. |
|
p*****k
发帖数: 318 | 39
DuGu, i see - sorry that was a naive argument.
here are some thoughts based on what ppl have discussed so far:
since every polygon can be triangulated, and every triangle can be
decomposed into two right triangles, it suffices to prove this
"measure function" vanishes for all right-angled triangles.
now take the middle points of each side, along with the right-angled
vertex. this forms a rectangle; the rest are two similar triangles
of half of the original size. by repeating this, the origina |
|
z****g
发帖数: 1978 | 40 B(X) = B_1*x_1 + B_2*x_2 + ...+ B_n*x_n
Since B(X) is symmetric in terms of polynomial(1st degree in your case), all
{B_i}s should be symmetric.
For a simple case, if limit {B_i} in real field. Every {B_i} can be
diagonalized, since they are all real symmetric. Say B_i = T_i*E_i*T_i^{t}
decompose f(x)*I into sum_i{a_i*x_i*T_i*T_i^{t}}. You can see the result
directly. |
|
z****g
发帖数: 1978 | 41 B_t is not independent from itself.
However, B_t1, B_t2, B_t3 can be decomposed into independent variables
B_t1, B_t2-B_t1, B_t3-B_t2, which will make the proof correct. |
|
z****g
发帖数: 1978 | 42 This formulate a inter-changeable group because + and - are allowed at the
same time. So it is equal to the following algebra question:
find smallest subset A in X such that
A+A=X, where A+A := {a+b} for any a, b in A.
I can't remember the exact theory in algebra to decompose X, but I am sure
there is one. And it has something to do with prime number. Seems the basic
component is decided by 40 = 2 * 2 * 2 * 5 |
|
r**a
发帖数: 536 | 43 suppose the call is down-out call. The payoff can be decomposed as a vanilla
call with strike B(barrier) and (B-K) times a digital call with strike B
too. Then use the static hedge to price the barrier.
For the delta and gamma, i guess in your case, they would be close to zero.
Note I did not do the calculation here. So my answer would be wrong. |
|
G******e
发帖数: 229 | 44 You may try Fourier analysis to decompose the time series as the sum of 4
periodical functions.The time complexity is O(N*logN), where N is the size
of the time series. |
|
h***s
发帖数: 35 | 45 1. 怎样将一个排序的字符串数组分解为两个随机的数组?
小弟的答案是产生随机数,随机数乘数组上限得到index, 拿出index所指的字符串.
重复该过程直到得到一半的字符串.
这个解法的问题是:可能连续产生两个非常接近的随机数,进而产生连续的index, 导
致某些字符串有序.
2. 一个covariance matrix (C), positive definite. what's the exponential of
coveriance, that is, exp(C)?
Hint from interviewer: 1. Taylor expansion; 2. Decompose converiance
matrix.
小弟的答案是: Taylor expansion of exp(C)= 1+C/1!+ C*C/2!+...C^N/N!+...
忽略N阶以上的展开项.
这个解法的问题是:approximation. 面试官要精确精确的结果!!!
小弟不才,恳请高手赐教.非常感谢! |
|
s***e
发帖数: 267 | 46 For 1 you can use an algorithm similar to random sorting, i.e. pick a
uniform number S1 between 1..N, swap X[1] and X[S1], then pick S2 uniform
from 2..N, swap X[2] and X[S2], .., until you get N/2 done.
For 2 you can decompose C into things like C = U S U^T and the rest should
be easy to compute. |
|
r***a
发帖数: 58 | 47 Since J is symmetric (it has to be), it can be decomposed to
J = B'DB Where D is a diagonal matix with eigenvalues \lambda
and B would be the vectors corresponding to the eigenvalues
A = B'sqrt(D)
There are a few methods for calculating \lambdas. Go get a book
on matrix calculation. |
|
b****d
发帖数: 30 | 48
it depends on how you define 'science'. I believe evolution is science, or
at least an effort to 'make science', just because its intention to factor
, decompose, formulate, etc, observable facts. it could be wrong, but
remember a wrong science is still science. |
|
f*******d
发帖数: 339 | 49
It is not meaningful, because then at large enough scale, such water would be
pulled togather by gravity to form planets or stars, which would undergo
nuclear reaction and produce other elements (water would be decomposed
to Hydrogen and Oxygen), and the intervening space is vacuum, just like ours.
(In our Universe, it is Hydrogen and Helium dominant). |
|
b****d
发帖数: 30 | 50 in another word, how to determine an element in a permutation group can be
decomposed to a set of preselected elements? |
|
