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全部话题 - 话题: uniforms
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n*********0
发帖数: 925
1
http://www.glorypress.com/devotional/FaithAndLifeOneYearBook.asp?bid=1
奉祂的名
经文: 「向来你们没有奉我的名求什么,如今你们求就必得着,叫你们的喜乐可以满足
。」(约16:24)
当美国在南北内战时期,有一人的独生子加入联邦方面的军队作战,父亲是银
行家,他虽同意儿子投军,但父子分
离,他心中终觉得黯然自伤。
他开始对年轻的军人发生深挚的关怀,每当看到穿军服的人,他的心就因为想
到自己的儿子而要跳出胸膛。他神不
守舍,疏忽业务,把钱财用去照顾回乡的残废军人。他的亲友从旁规劝,说他不应该荒
废事业,不该为军人花费那么多
的心思,他听了劝谏,于是决心改变方针。
当他如此决定之后,有一天,有个士兵走进银行来,军服破烂不堪,脸上和手
上都有医疗过的伤痕。
那可怜的士兵手忙脚乱地想从口袋里掏出什么东西来,银行家看见了,猜知他
的目的,就对他说:
「孩子,今天我实在忙不过来,没有办法接待你。你应该到你们的司令部去;
那儿有军官会照顾你。」
... 阅读全帖
x****u
发帖数: 12955
2
来自主题: paladin版 - 古代造铁船的可行性?

rustproofing
Anti-rust is just a minor problem compared to the problem of properly
sealing all the joints. To close the joints, you need either rivets or
welds. Weld is completely out of question because it needs massive amount
of electricity. Riveting is also very difficult because you need to be able
to make uniform sized steel rivets, and able to drill uniform sized holes
to fit the rivets.
s******l
发帖数: 278
3
来自主题: SciFiction版 - Dune book 2 - 8
My father, the Padishah Emperor, was 72 yet looked no more
than 35 the year he encompassed the death of Duke Leto and
gave Arrakis back to the Harkonnens. He seldom appeared in
public wearing other than a Sardaukar uniform and a Burseg's
black helmet with the imperial lion in gold upon its crest.
The uniform was an open reminder of where his power lay. He
was not always that blatant, though. When he wanted, he
could radiate charm and sincerity, but I often wonder in
these later days if anything
c****t
发帖数: 19049
4
来自主题: SciFiction版 - 云图 英文版
LETTERS FROM ZEDELGHEM
CHATEAU ZEDELGHEM,
NEERBEKE,
WEST VLAANDEREN
29TH-VI-1993
Sixsmith,
Dreamt I stood in a china shop so crowded from floor to far-off ceiling with
shelves of
porcelain antiquities etc. that moving a muscle would cause several to fall
and smash to bits.
Exactly what happened, but instead of a crashing noise, an august chord rang
out, half-cello,
half-celeste, D major (?), held for four beats. My wrist knocked a Ming vase
affair off its
pedestal—E-flat, whole string section, g... 阅读全帖
l***n
发帖数: 4
5
Assume X is Uniformly distributed on [0,1]; Y is Uniformly
distributed on [-a,a] (0 then what is the p.d.f or distribution function of Z = X + Y?
Or what is Probability{X+Y I tried to use convolution method, but in case of z>1-a & z>a,
it doesnt work.
Please help me.
Thanks
p*********e
发帖数: 32207
6
太精彩了!
读完有两点想说:
一个是marbury vs madison,
任东来先生(已去世)写的"美国宪政历程:影响美国的25个司法大案"
http://news.163.com/08/0221/13/457SD57G00012GGE.html
有一个比较详细的介绍
不知道师兄能不能看一下然后给出一些评价?
另一点就是关于equal justice under law的中文翻译
师兄的文中译为"法律之下的公平正义"
感觉这里的equal翻译成公平有些不舒服.
主要是印象里"公平"一直都对应英文的"fair",意在说明"合规"
韦氏词典对fair的定义:
"
"
google "fair definition"给出的定义:
"
in accordance with the rules or standards; legitimate.
"the group has achieved fair and equal representation for all its members"
synonyms: just, equitable, honest, upright, h... 阅读全帖
p*********e
发帖数: 32207
7
太精彩了!
读完有两点想说:
一个是marbury vs madison,
任东来先生(已去世)写的"美国宪政历程:影响美国的25个司法大案"
http://news.163.com/08/0221/13/457SD57G00012GGE.html
有一个比较详细的介绍
不知道师兄能不能看一下然后给出一些评价?
另一点就是关于equal justice under law的中文翻译
师兄的文中译为"法律之下的公平正义"
感觉这里的equal翻译成公平有些不舒服.
主要是印象里"公平"一直都对应英文的"fair",意在说明"合规"
韦氏词典对fair的定义:
"
"
google "fair definition"给出的定义:
"
in accordance with the rules or standards; legitimate.
"the group has achieved fair and equal representation for all its members"
synonyms: just, equitable, honest, upright, h... 阅读全帖
w*****s
发帖数: 4116
8
来自主题: HAINAN版 - 海南统一校服 被轰敛财
i think you'd like the uniform from HN university which is very ugly sports
uniform.
w********1
发帖数: 3492
9
Wed, 27 Jun 2012 12:00:18 PDT
Earlier this week, The Next Web noted that some early purchasers of the
Retina MacBook Pro have been experiencing "ghosting" on their machines'
displays, with remnants of previously-displayed screen contents remaining
visible for some time afterward.
Some readers on the ASC forum have reported the image retention issue with
as little as 20 minutes worth of use. However it’s well worth noting that
the problem isn’t happening to everyone, and image retention isn’t
unc... 阅读全帖
c**********t
发帖数: 80
10
来自主题: CS版 - PROOF -- Re: EE challenge CS
This proof is based upon melo's idea, and hopefully it is correct.
Let A be (0, 0) and B be (0, 1) on the X-Y plane. If we trace the curve
joining A and B
at a uniform speed, the curve can be represented as a vector-valued time
function
(x(t), y(t)). Without loss of generality, assume point (x(0), y(0)) be A, and
point (x(1), y(1)) be B. That is, it takes one second to trace the curve from
point A to B.
The uniform speed assumption and the fact that curve is continuous imply x(t)
and y(t) are bo
e*****g
发帖数: 2560
11
来自主题: CS版 - EM 算法
EM 算法可以用于解决 gaussian mixture 的分类估计。
能不能用于解决其它 mixture models 的分类估计?
例:我的问题是
Input: 数据是一个gaussian 和一个 uniform distribution 的混合
Output: 用EM算法来估计那个data sample是属于gaussian分布
那个data sample是属于uniform distribution分布。
可以或不可以,可否解释一下,或给个reference.
先谢了
j**********s
发帖数: 132
12
来自主题: CS版 - 请教一道老面试题,谢谢
这样做是错滴,几个 uniform distribution 的 random variable 之和就不在是
uniform distribution 了。
s**********o
发帖数: 14359
13
来自主题: Database版 - 数据Delta的提取,求建议
免费的有WINMERGE可以比较文本,不过30GB还是太大了
30GB都是什么东西呢,是UNIFORMED的数据吗
还是文字?如果是UNIFORMED的有KEY的话
IMPORT数据库去比较相对容易一些
t****t
发帖数: 6806
14
来自主题: Programming版 - 如何使用这个template?
从prototype看这个class设计思想是这样.
class的参数明显是数据类型,多半不是float就是double
那个operator()的参数是uniform generator class,因为高斯随机数通常是由均匀分布
的随机数变换而来,而uniform的质量有不一样,所以为灵活起见要求你提供一个.
用的时候这样写
normal_distribution n_prng(mean, sigma);
lagged_fibonacci607 u_prng( ... );
double x=n_prng(u_prng);
O******e
发帖数: 734
15

The above line is strictly speaking problematic unless you can guarantee
that the low-order bits returned by rand() are uniformly randomized.
See either Chapter 3 of Knuth or Chapter 7 of Numerical Recipes or
"man -S 3 rand" on a Linux system for the correct way of randomly
selecting integers with uniform probability.
F********t
发帖数: 962
16
【 以下文字转载自 JobHunting 讨论区 】
发信人: zhimage (common), 信区: JobHunting
标 题: ask help for several interview questions
发信站: BBS 未名空间站 (Thu Sep 10 18:17:53 2009, 美东)
1. Given a random generator which can generate integer number from 1 to 5
with uniform probability. how to generate number from 1 to 7 with uniform
probability.
2. Find the shortest path to convert one string to another using the minimum
edits with each transformation string being a valid dictionary word in a
dictionary.
for example: for->f
m*******u
发帖数: 1821
17
certificate和license啥区别?我从colorado的网站上找到下面规定,需要1年的
public accounting firm的经验呀。
There are four parts (the fours "E's") to obtaining a Colorado Certified
Public Accountant Certificate.
•First, you must meet the education requirements to qualify to take
the Uniform CPA Examination.
•Second, you must successfully pass the Uniform CPA Examination.
•Third, you must take and successfully pass the AICPA Ethics
examination or its equivalent.
•Fourth, you must have one year of exper
I****s
发帖数: 467
18
来自主题: Accounting版 - 请大家推荐一下学分评估机构吧!
不是写的很清楚嘛
http://www.facsusa.com/page0002.html
How long does the evaluation process take?
If appropriate and complete documentation is provided when a request is
submitted, the evaluation process usually requires three to six weeks from
the time the request is received by FACS, depending on the evaluation volume
at the time the request is received. Applicants abroad are advised to
submit their evaluation requests four to six months in advance of their
board's testing window in order to allow suff... 阅读全帖
d**********y
发帖数: 51
19
来自主题: Accounting版 - 真心求教:关于cpa补学分
真心请教:我准备报考florida的cpa,该州的考试要求有这么一条: As part of the
general business hours, applicants are required to have a total of six
semester hours or eight quarter hours of business law courses, which must
cover contracts, torts, and the Uniform Commercial Code.
我国内本科会计学分评估后,business law 学分不够,准备找附近社区大学补修,可
是社区大学bl很基础没有cover uniform commercial code, 现在很苦恼,找了lsu网上
课程,但是正好这两名课程关闭。不知道该去哪补修这个学分,不知道版上大侠有没有
类似经验,还有到时候报名审查到底严不严格!
谢谢大家!
l***o
发帖数: 7937
20
说了半天,连个连接都给不出来。果然是信口开河,信口胡诹,信口雌黄。无知不是你的错,但拿无知当令箭出来忽悠人就不可原谅了。那个htscorpion还真被你忽悠到了。基本的科学事实不容许你唱高调,放空炮,搞烟幕,打马虎眼。再给你看一个:
"How many cells are in an adult human? Lots. More than anyone could count,
and the bigger you are the more cells there would be. Growth is a process of
cellular reproduction, so as you grow bigger you are made up of more cells.
Following a similar logic, a larger person is larger because they have more
cells, not because their cells are larger. In fact, cell types have a
fairly un... 阅读全帖
s**u
发帖数: 9035
21
Postdoctoral Fellowships in Tobacco Control Research
The purpose of the fellowship is to attract diverse individuals from a
wide variety of backgrounds in medical, biological, social,
behavioral, and policy sciences to develop a new generation of
academic leaders in tobacco control. Upon completion of training,
fellows will be well positioned to be active participants in crucial
policy debates about the future development and implementation of
tobacco control interventions. The need for tobacco... 阅读全帖
s****9
发帖数: 932
22
What is your control, Wild type mice control or no antibody control?
It does not looks positive from my view. It is unlikely that all of these
cells in this layer are uniformly positive. In addition, the cell size of
positive cells in your picture look pretty round and uniform, while the size
of true positive apoptotic cells are quite heterogeneous and look different
from healthy cells.
f******g
发帖数: 1003
23
来自主题: Biology版 - IDH1突变育苗出来了--nature
A vaccine targeting mutant IDH1 induces antitumour immunity
Monoallelic point mutations of isocitrate dehydrogenase type 1 (IDH1) are an
early and defining event in the development of a subgroup of gliomas1, 2, 3
and other types of tumour4, 5, 6. They almost uniformly occur in the
critical arginine residue (Arg 132) in the catalytic pocket, resulting
in a neomorphic enzymatic function, production of the oncometabolite 2-
hydroxyglutarate (2-HG)7, 8, genomic hypermethylation9, 10, 11, genet... 阅读全帖

发帖数: 1
24
9月28日Joe Miano
Most of you have already moved on from this discussion but I wanted to chime
in one last time with our negative data in the mouse. Whether we used
original plasmid or a custom NgAgo that was codon-optimized for mouse with
untranslated sequences, a Kozak Methionine, and polyA tail the results were
uniformly negative. We used a 5' phosphorylated ssDNA (both IDT bought or
in vitro phosphorylated) along with the mRNA to codon-optimized NgAgo and an
HDR template we used successfully ... 阅读全帖
t******o
发帖数: 467
25
来自主题: CivilEngineering版 - 请问谁有停车场的设计经验?
UBC and IBC Code did not clearly specify maximum single vehicle weight
rather than specify design uniform load and concentric load on wheel.
However, you can estimate single vehicle gross weight assuming wheel design
load is 40% of gross weight.
For UBC1997 code, per table 16-A item 6, design uniform load is 50 psf for
private or pleasure-type motor vehicle storage. Design concentric load for
this type car is 2000 lbs on 20 sq. inches area per section 1607.3.3. This
is equivalent to total vehi
j****6
发帖数: 207
26
来自主题: CivilEngineering版 - Papers help!
papers help!
先谢谢.好些会议文献,比较难找,不管怎么样,先谢谢大家先!
Email: z***********[email protected]
1.Wardenier, J., 2007: A uniform effective width approach for the design
of CHS overlap joints.
Proceedings 5th International Conference on Advances in Steel
Structures, Singapore, Vol. II, pp.
155-165.
2.Qian, X.D., Wardenier, J., and Choo, Y.S., 2007: A uniform approach
for the design of CHS 100% overlap joints.
Proceedings 5th International Conference on Advances in Steel
Structures,
Singapore, Vol. II, pp. 172-182.
3.L... 阅读全帖
f*******y
发帖数: 421
27
来自主题: CivilEngineering版 - floor loading 怎么算呀
多谢。那所谓的floor loading应当是uniform load.那一个4吨的设备,spread sheet
是按照uniform load 来算面积了。
Y****e
发帖数: 7
28
来自主题: Computation版 - 那位大侠帮帮我!matlab问题
用fmincon算3
个parameters,每3个都是对一个方程作最小化,3个parameter都限制在[0,1]内,有一
系列的方程(上千个。。),每一个都要输出这3个parameters。但是用matlab中的fminc
on语句算出的parameter很多都在边界点上,但是教授说在0,1上的都不可能是global
min只是local
min,他不希望看到在边界点上的取值。。怎么样才能让这些parameter在[0,1]内取到最
值点呢?
而且不可能对这一系列方程只取一个uniform initial value,怎么取uniform initial
value都有些点parameters在边界上。。。还有不太能用速度太慢的算法求,例如不能用g
a。
哪位大侠知道怎么设定option,或者这么设一个penalty
function让他不可能取值在0,1上吗(比如说值取到1就自动重取)?但是这样一个penal
ty function可能要花很多时间,或者根本不能converge。。。怎么办啊~~~急死了~~~
小弟出来乍到,不胜感激啊~~~~
M*******r
发帖数: 165
29
来自主题: Computation版 - 请教关于random number generator
给一个seed以后,generator产生的数是uniform distribution.
那么给N个随机的seed(independent,不确定的distribution)到N个generator,产生
的第一个
随机数(N个)也是independent的吗?也是uniform distribution吗?
Y****e
发帖数: 7
30
小弟在用matlab编garch(1,1)variance forecast的程序,
用fmincon算3 个parameters,每3个都是对一个garch(1,1)方程的variance作最小化
,3个parameter中两个都限制在(0,1)内,有一 系列的方程(上千个。。),每一个
都要输出这3个parameters。但是用matlab中的fminc on语句算出的parameter很多都在边
界点上,但是教授说在0,1上的都不可能是global min只是local min,他不希望看到在
边界点上的取值。。怎么样才能让这些parameter在(0,1)内取到最 值点呢?
而且不可能对这一系列方程只取一个uniform initial value,怎么取uniform initial
value都有些点parameters在边界上。。。还有不太能用速度太慢的算法求,例如不能用g
a。
哪位大侠知道怎么设定option,或者这么设一个penalty
function让他不可能取值在0,1上吗(比如说值取到1就自动重取)?但是这样一个penal
ty function可能要花很多
z*****n
发帖数: 7639
31
hehe,要是这么容易,那还叫无解题吗?
要求是从uniform distribution rand5 to
uniform distribution rand8.
c*******m
发帖数: 522
32
我觉得是看你要保留的bits是多少了。一般quantization noise假设是一个uniform
distribution.数字信号的bits不一样,uniform distribution的variance也不一样。
你可以看下这个书Discrete-time signal processing
[PDF] from ketab.irAV Oppenheim, RW Schafer, JR Buck - 1989
希望有帮助。如果说得不对,还希望各位大牛拍砖
T*******x
发帖数: 8565
33
Uniform boundedness
or
uniformly bounded?
i*******q
发帖数: 1
34
来自主题: Mathematics版 - 来道概率题
Let X, Y be independent random variables that follow uniform distribution
U(0,1). Denote random variable Z the product of X and Y. Then the PDF of Z
is: P_Z(z)=-\lnz when 0 The problem is: Given a random variable Z with the above PDF, how can we
construct two random variables X and Y such that:
1. X and Y are independent.
2. both X and Y follow uniform distribution U(0,1).
d****i
发帖数: 77
35
发信人: dongzi (α), 信区: Statistics
标 题: 请教一个问题:球面上平均分布的点的夹角问题
发信站: BBS 未名空间站 (Thu Feb 2 17:25:06 2006)
n维球面,n大于2
x是其上一个固定向量,y是一个vector randomly generated with uniformly
distribution on sphere.
问他们的夹角分布情况
n=2的时候是0到 pi的uniform distribution. n>2是如何,还请大家指教,多谢!!
i*****l
发帖数: 50
36
来自主题: Mathematics版 - 请教一个概率题
【 以下文字转载自 Quant 讨论区 】
发信人: ilovekl (ibm), 信区: Quant
标 题: 请教一个概率题
发信站: BBS 未名空间站 (Thu Dec 13 23:58:15 2007), 转信
Let X have the binomial distribution bin(n, U), where U is
uniform on (0,1). Show that X is uniformly distributed on
{0,1,2,....n}
不知道发哪里好,这里牛人多,给解一解吧
n******t
发帖数: 4406
37
恩,同学我怎么说你的,人没本事没什么,猥琐就不好了。
你解释一下下面这篇文章吧.
发信人: yyrsh (yyrsh), 信区: MedicalCareer
标 题: 请教贴,关于UNIFORMED SERVICES UNIVERSITY
发信站: BBS 未名空间站 (Sun Aug 2 17:08:06 2009, 美东)
标 题: 请教贴,
在下学艺不精,正经医学院是考不上了,听说米国有个什么军医大学(UNIFORMED SERVICE
啥啥的)比较好混,各位大哥能指点一下吗? 比如好不好考,将来好不好混,收入等.....,
谢了
c*****t
发帖数: 520
38
来自主题: Mathematics版 - 请教standard parabolic regularity
Thank you very much for your reply. But I do not understand this conclusion.
I think it is too strong. I want to know it in detail. Can you recommend
some books on this topic?
In the paper "The Approach of Solutions of Nonlinear Diffusion Equations to
Travelling Front Solutions", by Paul C. Fife and J.B. McLeod in 1977, the
authors discussed the following equation:
u_t=u_xx+f(u), -\infty0.
f\in C^1[0,1], f(0)=f(1)=0.
If the initial data u(x,0)\in[0,1], then u(x,t)\in[0,1] for any t>... 阅读全帖
l******7
发帖数: 311
39
来自主题: NanoST版 - 请教:关于soft lithography
我现在用这个技术制作纳米级的光栅,但是issue是经常不uniform,不知道如何用力才
能uniform,我是新来的,经验不够,也找不到solutions所以想请教大家,谢谢!
t*****r
发帖数: 1765
40
(纽约州),这就是你在
国内的认证机构会收到这样一份表格,以前主要是给学校填的,如下,英文还看不明白
的,中文翻译在最下面。本文仅供参考交流,如有律师中介协助办理,以律师为准。
Verification of Academic Record
CGFNS P.O. Box 8628,Philadelphia PA 19104-8628 USA Telephone(215)349-8767
Fax(215)349-0026 Email:e****[email protected]
Applicant Name:____1____ Date of Birth:______2_______
Type of Program:______3___ Years of Education Required for Admission:______4
____
Name of Degree/Diploma Awarded:________________5____________________________
(Please print title of degree/diploma in native lang... 阅读全帖
d****u
发帖数: 55
41
来自主题: Nursing版 - 工作面试的服装
请问一下护士工作面试可以穿UNIFORM吗?
找了半年的也没有找到,我一直穿黑色套装,或衬衫.可是今天一个在职的RN给我说应该
穿UNIFORM.才显的专业,特别是我这中没有工作经验的人.
有点没方向了.
e********t
发帖数: 10
42
来自主题: Physics版 - 问一个beam spread的理论解
第一次来这个版面, 请多关照:)
请问一个Uniform electron beam with uniform monoenergetic velocity(in
traveling direction)在空间两平板间的扩散有没有理论解? 平板为conductor,平板间
无电势.二维.
如果没有, 做什么近似可以得到近似解呢?
m********r
发帖数: 811
43
来自主题: Physics版 - 帮忙做题:Ion Sources 4
这次彻底不知道说的什么了。。。
For an ion source, the maximum half-angle of ion emission from the source is
18 milliradians. The source is biased to 10.5 kV and the aperture radius is
2 mm. Assuming uniform emission of the aperture and uniform distribution of
particles over this range, what is the normalized emmitance from the source
if the beam consist of ions 40 Ar 9+?
m********r
发帖数: 811
44
来自主题: Physics版 - ion source
For an ion source, the maximum half-angle of ion emission from the source
is 18 milliradians. The source is biased to 10.5 kV and the aperture radius
is 2 mm. Assuming uniform emission of the aperture and uniform distribution
of particles over this range, what is the normalized emmitance from the
source if the beam consist of ions 40 Ar 9+?
z*******9
发帖数: 167
45
【 以下文字转载自 Quant 讨论区 】
发信人: zheda1999 (zheda1999), 信区: Quant
标 题: Re: 一道很有意思的老题: some thought
发信站: BBS 未名空间站 (Tue Aug 10 00:32:00 2010, 美东)
I think this is the first serious response I have ever seen.
==============
sly, F or G is cumulative distribution function, which is
uniform in [0,1]. seems to me nothing wrong here in shede's
expression.
============
I think your discussion is very close to my point here.
F is uniform in [0,1]. Do you know why?
If you know how to prove it, you will know t
S***p
发帖数: 19902
46
来自主题: Physics版 - 来道题活跃一下思维
Prove of disprove the following claim
suppose Sum_{n=0,1...}f_n converges pointwisely to a function f on a set E
and {f_n} converges uniformly on E
then Sum_{n=0,1...}f_n uniformly on E
d*******2
发帖数: 340
47
来自主题: Physics版 - Diffractive optics
http://www.edphoton.com/en
Wuxi OptonTech Ltd. specialises in diffractive optical elements (DOEs) and
computer generated holograms (CGHs) for flat-top (also referred to as top-
hat or super-Gaussain) beam shaping and other general beam shaping, beam
splitting, beam homogenizing (diffusing). Examples of general beam shaping
include multi-line patterns, square, view finder, crosshair, grids, rings,
etc. Typical applications of DOEs include phase gratings for optical linear
encoders, DOEs for motio... 阅读全帖
B*********h
发帖数: 800
48
来自主题: Quant版 - [合集] 面试题
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nociceptin (温柔的剑侠) 于 (Thu Nov 2 10:55:34 2006) 提到:
火车长度
已知一火车长度的概率分布是uniform distribution from 1节车厢 to 100节车厢.
一个人从车站上车, 他不知道他处在火车的什么位置。为了找出他在火车上的位置,
他选择任意一个随机的方向走到火车的尽头(设为A),这时他发现他上车时处在火车的
第5节(从火车尽头A算起)。如果假定上车后所在的位置是随机的,请问这辆火车最有
可能是几节。
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yogaII (...) 于 (Thu Nov 2 11:22:28 2006) 提到:
5
argmax_n (p(L=n|x=5)) O( argmax_n (p(x=5|L=n)) //according Bayes and
uniform
p(x=5|L=n) = 1/n n>=5
0 otherwi
b***k
发帖数: 2673
49
来自主题: Quant版 - [合集] 请教一个概率题
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ilovekl (ibm) 于 (Thu Dec 13 23:58:15 2007) 提到:
Let X have the binomial distribution bin(n, U), where U is
uniform on (0,1). Show that X is uniformly distributed on
{0,1,2,....n}
不知道发哪里好,这里牛人多,给解一解吧
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Angel (On leave) 于 (Fri Dec 14 00:19:57 2007) 提到:
google beta distribution, you will get some hints.

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ilovekl (ibm) 于 (Fri Dec 14 00:38:22 2007) 提到:
can you add some m
i********e
发帖数: 31
50
来自主题: Quant版 - 问一个概率的问题 (转载)
Let z = x+yi, \rho = abs(z) = |z|, \theta = arg(z)
case A:
z -> z^2/|z|^2: (\rho,\theta) -> (1, 2\theta)
case B:
z -> z^2/|z|: (\rho,\theta) -> (\rho, 2\theta)
fact I:
if z ~ complex normal, then
\theta ~ uniform distribution on the unit circle [0, 2\pi)
fact II:
the uniform distribution on the unit circle is
translation and scale invariant
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