u***8
发帖数: 1581 | 1 这个是dp的问题吧。
给一个数字n，用减1，or 能整除2 就整除，能整除3就整除，3种方法，将n 减到1。
求最少的steps。
好像简单的。
我给了个算法。最后15分钟，有点赶。leetcode有类似题目么？不记得了。貌似有个变
形的题目，类似。
public int getMinSteps(int n) { // 1 ---> n , better way to do from n
-->1
int[] arr = new int[n]; arr[i] denotes how many steps to get value
i+1;
//dynamic programming to refresh the array;
//arr[i] denotes min steps to reach 1＋i, so 1 =1 , 0 steps needed.
arr[0] = 0;
arr[1] = 1;
for (int i = 2; i < n ; i++) ... 阅读全帖 |
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x*******e
发帖数: 60 | 2 FYI
The American Heritage Dictionary of the English Language has a usage note on
this topic: "By convention, 12 AM denotes midnight and 12 PM denotes noon.
Because of the potential for confusion, it is advisable to use 12 noon and
12 midnight."
http://en.wikipedia.org/wiki/Ante_meridiem#Confusion_at_noon_an |
|
p****s
发帖数: 3184 | 3 数据男系列的续集啦
假设A,B两队, 本赛季都输过, 那么如何判别A强于B, 还是相反呢?
在一个有向图里, 图的节点集是所有NCAA Division I的队,
图的边集是这样构造滴: 如果两个队之间有过比赛, 则有一边从赢的节点指向
输的节点.
算有多少条multi-path从A指向B, count一下所有这些multi-path上的distinct
节点数, denote as #AB.
另算有多少条multi-path从B指向A, count一下所有这些multi-path上的distinct
节点数, denote as #BA.
若#AB > #BA, 则 A强于B
若#AB < #BA, 则 B强于A
若#AB = #BA, A和B必须打上一架才能定输赢, 何如?
哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈 |
|
G****e
发帖数: 11198 | 4
给几个数据，可以去思考一下，为什么华人可以起到关键少数的作用。是否真的起到这
个作用，要看我们怎么助选。就看这次大选华人踊跃支持Trump，捐款。除了几个龙虾
州，其他州有投票权的华人投给Trump具体会多出来多少呢？
这是一个值得我们研究的话题，要起到关键的少数，往往就是在平衡的天平上多加那么
一点点砝码，赢者通吃的electoral college制度下，少数的分量就不容忽视。
注意：我们华人人少，所以要避免微不足道，就得掌握这个砝码的作用。不能觉得我们
人少，不起作用。往往这些关键州的票数离得那么近，往哪个党派多倾斜点，这个州就
拿下了。
https://en.wikipedia.org/wiki/United_States_presidential_election,_2016
Close races
Red denotes states (or congressional districts whose electoral votes are
awarded separately) won by Republican Donald Trump; blue denotes t... 阅读全帖 |
|
g*******e
发帖数: 4737 | 5 你非要跟我浇这个汁。自己看吧。
Motion, move, movement refer to change of position in space. Motion denotes
change of position, either considered apart from, or as a characteristic of,
something that moves; usually the former, in which case it is often a
somewhat technical or scientific term: perpetual motion. The chief uses of
move are founded upon the idea of moving a piece, in chess or a similar game
, for winning the game, and hence the word denotes any change of position,
condition, or circumstances for t... 阅读全帖 |
|
s**l
发帖数: 11983 | 6 全面信息如下：
16teams:
seeds (小组第 1名):denoted as capital letters from A to H
A 拜仁 ( A 组第 1名）
B 国米 （B 组第 1名）
C 本菲卡 （下同）
D 皇马
E 切尔西
F 阿森纳
G 希腊人竞技
H 巴萨
non-seeds (小组第 2名): denoted as small letters from a to h
a 那不勒斯 ( A 组第 2名）
b 中央陆军 （Ｂ 组第 ２名）
c 巴塞尔 (下同）
d 里昂
e 勒沃库森
f 马赛
g 泽尼特
h 米兰
同国家的：
英格兰：E,F
西班牙：D,H
法国： d,f
意大利：B, a, h
德国：A, e
希腊：G
葡萄牙：C
俄罗斯：b, g
瑞士：c
规则：
（１）相同的字母但是大小不同的不能相遇， 比如Aa不允许。即小组赛是同一个小组的不再相遇
（２）相同国家不能相遇，比如Ae不允许。
（３）大小一样字母不能相遇，比如AE，cg不允许。即种子队只和非种子... 阅读全帖 |
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r****1
发帖数: 4301 | 7 占星警句（Choice Aphorisms）原文摘选自卡丹(Jerome Cardan 1501—1576)的着作《
Seven segments of Cardan》。卡丹被誉为16世纪的博学者，拥有数学家、物理学家、
医药学家、天文学家、及术士等多个头衔。在他的有生之年，他出版了多达54本着作和
44件手稿，内容涉及了他研究的各个领域。占星警句讲的是星盘分析的一些规则和条文
，按条目的方式列出，分为总论篇、命盘篇、推运篇、医疗篇、择时篇、蚀彗篇、气候
篇、农作篇、实事篇等9部分，论及范围着实广泛。不过，如果以条文的数目来看，命
盘篇是核心部分，共计100条，其它篇的内容相对少很多，可能是与删节有关。
在历史上的顶级占星名家中，还没有Cardan的位置，不知是不是他学识太杂的原因，
很多谈及他的资料均是与数学、人文科学或玄学相关，占星作为玄学，只是他学识中的
一小部分。根据有关资料的判断，占星警句很可能是他汇编成文的，其中有不少条文内
容是值得我们深入思考和借鉴的。
1、A Child is then said to be born when first it breathes in... 阅读全帖 |
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B******O
发帖数: 472 | 8 从别的地方copy过来的。
Let L denote the length of the leash. Let O be the center of the grass
circle, and Q the location where the leash is fastened. Let P and P' be the
two points on the circumference of the grass circle at distance L from Q.
Let B denote the measure of angle PQO in radians, and (C = π - 2B) the
measure of POQ. Because PQO is isosceles, we have L = 2 R cos B. The pie-
shaped region emanating from O and reaching from P to P' has area (1/2) R2 (
2C) = R2 C. The pie-shaped region emanating |
|
m********a
发帖数: 281 | 9 Who is asking ur option on how she should spend her money? Even if you have
denoted all of ur money either being $100 or $1b to some charity causes (
which I doubt u have denoted even $1), or you have been spending ur whole
life helping Africa people or plan to spend rest of life doing so, u have
no right to ask others to do so or make others believe its more noble
Mind ur own business , don’t zhuang 13 |
|
x****d
发帖数: 1766 | 10 ++++Agápe (ἀγάπη agápē[1]) means "love: esp. brotherly love
, charity; the love of God for man and of man for God."[2] Agape is used in
the biblical passage known as the "love chapter," 1 Corinthians 13, and is
described there and throughout the New Testament as brotherly love,
affection, good will, love, and benevolence.[3] Whether the love given is
returned or not, the person continues to love (even without any self-benefit
). Agape is also used in ancient texts to denote feelings f... 阅读全帖 |
|
x****d
发帖数: 1766 | 11 ++++Agápe (ἀγάπη agápē[1]) means "love: esp. brotherly love
, charity; the love of God for man and of man for God."[2] Agape is used in
the biblical passage known as the "love chapter," 1 Corinthians 13, and is
described there and throughout the New Testament as brotherly love,
affection, good will, love, and benevolence.[3] Whether the love given is
returned or not, the person continues to love (even without any self-benefit
). Agape is also used in ancient texts to denote feelings f... 阅读全帖 |
|
q*****m
发帖数: 3339 | 12 continue bhd-ing:
先说个容易的，也是最好改正的，估计是大师唱的时候没注意：
00:48
t: make the living fine
b: made the living fine
下面两个盖起来稍微难些，不过肯定难不倒大师：
01:01
t: very special things 唱得有点像
b: vary special things 了。
01:21
t: with her alone
b: with her along
t denotes "this" or "tidewater" rendition?
b denotes "better" or "best" rendition?
;) |
|
y******e
发帖数: 148 | 13 from dictionary.com
-ese
a suffix forming adjectival derivatives of place names, esp. countries or
cities; frequently used nominally to denote the inhabitants of the place or
their language: Faroese; Japanese; Vietnamese; Viennese. By analogy with
such language names, -ese occurs in coinages denoting in a disparaging,
often facetious way a characteristic jargon, style, or accent: Brooklynese;
bureaucratese; journalese; computerese.
[Middle English, from Italian, from Latin -ēnsis, origin |
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s********n
发帖数: 4346 | 14 What proposed here is a Bayesian model of predicting whether a particular
person is P, H or T.
Let Type denote a discreet variable of predictions P, H or T.
Let s denote an observed variable of appearance or attribute.
P(Type) is the probability of T, P, H based on common sense and statistics
without knowing anything about the particular person.
P(s,Type) is the probability of seeing characteristics s (long hair, shorts
, red Jeep, worrying about marrying a man, etc) given the Type.
Bayesian i... 阅读全帖 |
|
P******o
发帖数: 3428 | 15 Registered breeders vs backyard breeders can be a very emotive subject for
cat lovers. What are the differences between the two and is anyone whose
cat has had a litter of kittens a backyard breeder?
Let’s start by looking at definitions of these terms:
The term “registered breeder” denotes that a person is a member of one of
the numerous cat registering bodies with Australia. These are located in
all states of Australia and have similar aim and objectives, cat welfare
being the most importan... 阅读全帖 |
|
j******n
发帖数: 21641 | 16 Eros ( /ˈɪrɒs/ or /ˈɛrɒs/; Ancient Greek: &#
7956;ρως érōs) is one of the four words in Ancient Greek which can
be rendered into English as “love”. The other three are storge, philia and
agape. Eros refers to “intimate love” or romantic love; storge to “
affection” or fondness; philia to “brotherly love”, or the love between
family members or close friends; and agape refers to “selfless love”, or
“charity” as it is translated in the Christian scriptures (from t... 阅读全帖 |
|
j******n
发帖数: 21641 | 17 Eros ( /ˈɪrɒs/ or /ˈɛrɒs/; Ancient Greek: &#
7956;ρως érōs) is one of the four words in Ancient Greek which can
be rendered into English as “love”. The other three are storge, philia and
agape. Eros refers to “intimate love” or romantic love; storge to “
affection” or fondness; philia to “brotherly love”, or the love between
family members or close friends; and agape refers to “selfless love”, or
“charity” as it is translated in the Christian scriptures (from t... 阅读全帖 |
|
i********t
发帖数: 261 | 18 ☆─────────────────────────────────────☆
aixiaoke (流浪者的乡愁) 于 (Mon Oct 24 07:54:02 2011, 美东) 提到:
用“宇宙史诗”来形容刘慈欣的《三体》系列我想并不过分——它对宇宙的起源
、生命与环境间的相互作用、文明的演变、人类的整合，甚至宇宙的终极走向，都给出
了自圆其说的明确猜想及推论；这一庞大的体系通过一些相关而分离的片段如冰山一角
般呈现出了一个具有高度美感的思维体系，描述了永恒之初直至宇宙尽头的维度之旅；
它确立了微观与宏观彼此渗透交错的依存关系，而贯穿其中的则是人类的情感，有激情
的壮丽澎湃，有爱情的温柔微妙，也有绝情的冷酷黑暗。这一切的丰富片段、结构、内
涵极其跨越的时间广度，我觉得也只能用“史诗”来进行总结，否则便不足以准确表达
《三体》的气魄。
1 游戏
这么庞大的史诗故事起点却很微妙。文革中叶文洁目睹理论物理学家的父亲被红卫
兵小将们打死在批斗台上，而母亲为了自保不惜出卖人格丑态毕露。这个从时代泥沼中
成长起来的姑娘经历了一次又一次人间最险恶的政治斗争、最丑恶的灵魂背叛，终于... 阅读全帖 |
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G*******s
发帖数: 4956 | 19 Godhead is a Middle English variant of the word godhood, and denotes the
Divine Nature or Substance of the Christian God, or the Trinity. Within some
traditions such as Mormonism, the term is used as a nontrinitarian
substitute for the term Trinity, denoting the Father, Son, and Holy Spirit
not as a Trinity, but as a unified council of separate beings.
你还说摩门教不是异端？根本就是反对三位一体，你还说支持三位一体。 |
|
G*******s
发帖数: 4956 | 20 Godhead is a Middle English variant of the word godhood, and denotes the
Divine Nature or Substance of the Christian God, or the Trinity. Within some
traditions such as Mormonism, the term is used as a nontrinitarian
substitute for the term Trinity, denoting the Father, Son, and Holy Spirit
not as a Trinity, but as a unified council of separate beings.
你还说摩门教不是异端？根本就是反对三位一体，你还说支持三位一体。 |
|
l******t
发帖数: 490 | 21 解答：Allah為什麼有時候用複數代詞“我們”
The Quran, Allah and Plurality Issues (Sam Shamoun)
The Quran, much like the Holy Bible, uses plural pronouns for God even more
so than what we find in God’s true Word. Here are several examples:
This is part of the tidings of the things unseen, which We reveal unto thee
(O Apostle!) by inspiration: Thou wast not with them when they cast lots
with arrows, as to which of them should be charged with the care of Mary:
Nor wast thou with them when they disputed (the point). S... 阅读全帖 |
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j****e
发帖数: 508 | 22 Thanks! But I want the mathematical denote of 'root square (2)', not the text
denote. |
|
l*******k
发帖数: 361 | 23 看这个rating，这是根据城市的影响力来排序的，2008年的结果
20年后北京上海超过伦敦没问题吧
同属第二梯队的Paris, Tokyo, Hong Kong, Singapore, Sydney, Milan估计除了tokyo
，Hongkong早就被甩的没影子了
The first attempt to define, categorize, and rank global cities using '
relational data' was made in 1998 by Jon Beaverstock, Richard G Smith and
Peter Taylor, who all worked at that time at Loughborough University in the
United Kingdom. Together they established the Globalization and World Cities
Research Network. A roster of world cities was outlined in the Ga... 阅读全帖 |
|
s******y
发帖数: 28562 | 24 如果我们有特别明确的目标的话，的确是可以用你说的这种方法。
但是问题是我们是出于一个screening 的阶段，就是想看看不同的处理或者
细胞状态下，会对什么peptide 产生影响。但是我们现在得到了近千条
peptide sequencing, 但是在denotation 的时候，来源于同一个前体的
多肽会被标成同一个名字，这样就会对我们进一步分析数据产生不利影响，因为我们想
知道的是，在我们进行那些处理的时候，会不会产生新的多肽的形式，或者特异性的改
变其中一个形式的丰度。
比方这么说吧，Epiregulin 正常情况下是４９个氨基酸，但是说不定已经有人发现在
某些条件下能产生其他形式而且已经被人冠名为Epiregulin-2,Epiregulin-3等等名字
了。所以假如我们在搜寻的时候，能够自动的把那些其他形式的Epiregulin正确的冠一
个名，就会省我们非常非常多的力气，而不是会浪费我们的时间去研究一个别人已经研
究过的东西。
所以，我想，我们其实想要的，就是一个针对于peptidome 的denotation system.
当然，假如我们一横心，就把所有扫出来的pe... 阅读全帖 |
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s******y
发帖数: 28562 | 25 可以是可以。
但是我们不一定仅仅对那些有区别的有兴趣。那些没有区别的也可能会有兴趣的，
假如那些个多肽的生理功能很有意思的话。问题就是现在找不到合适的denotation
library, 一大堆多肽都不知道谁是谁。
而且，还有一个问题是，如果某些多肽是别人已经发现了而且标志了的话，就很有可能
是真的体外多肽，如果有些看起来好像是新发现的东西，那就既有可能是真的新的多肽
，也可能是我们的提纯过程中不小心产生的碎片。 但是缺乏denotation library的话
就无从分析这种可能性。 |
|
G****n
发帖数: 145 | 26 100+ citation articles of Qian Yingyi
Regional decentralization and fiscal incentives: Federalism, Chinese
stylestanford.edu 中的 [PDF]
Carnegie Mellon FulltextH Jin, Y Qian… - Journal of Public Economics, 2005
- Elsevier
Aligning the interests of local governments with market development is an
important issue for
developing and transition economies. Using a panel data set from China, we
investigate the
relationship between provincial government's fiscal incentives and
provincial market ...
被引用次数：... 阅读全帖 |
|
g******u
发帖数: 3060 | 27 S denote the price of a stock depends on t,
S denote the asset
price
got me confused. |
|
b*******d
发帖数: 32 | 28 It is t/2.
Because the distribution is uniform, let's consider the express train which
arrives every 6 minutes. The probability to wait time t is dt/6, therefore,
E(t)=\int_0^6 t dt/6= 3.
My computation for the problem is as follows:
For the express train (arrives every 6 min), the probability to wait time t is
dt/6, denoted as A
for the regular train (arrives every 3 min), the probability to wait time t is
dt/3 denoted as B
The probability to catch express OR regular train after time t is:
P(A |
|
s***n
发帖数: 9499 | 29 Minimize Trace((A'A)^(-1)),
Where variable A is an n by n real matrix, and every element of the matrix A
is between 0 and 1.
A' denotes the transpose of A.
^(-1) denotes the inverse of a matrix.
Any suggestions or references are highly appreciated! |
|
U**R
发帖数: 5 | 30 First of all, happy new year to everyone!
I'm stumbled by a question that, I believe, ought to be easy...
Given two measure spaces (X, Bx, p) and (Y, By, q), each equipped with a
sigma-finite measure, p on the sigma-field Bx over X and q on the sigma-
field By over Y, respectively, we know that there exists a product measure
space (X*Y, Bx@By, p@q), where "*" denotes Cartesian product and "@" denotes
tensor product. Suppose, furthermore, that there are two other sigma-finite
measures, P on Bx ov |
|
f**********d
发帖数: 4960 | 31 p(x) is a probability measure, q(z=k|x) is a likelihood, where k=1,2,...,K,
with \sum_k q(z=k|x)=1. The integral \int q(z=k|x) dx =infinity, for
k=1,2,...K. Questions:
1. Since q(z=k|x), k=1,2,...,K are measures in the l^\infty space, if they
are mutually singular, can we say that they are 'orthoganal to each other'?
I have seen that the sign to denote the mutually
singular is the same as the orthoganal sign. But I don't know if we can just
say the 'mutually singular' as 'orthogonal'?
2. Althoug... 阅读全帖 |
|
发帖数: 1 | 32 Best of Last Year—The top Phys.org articles of 2017
December 19, 2017 by Bob Yirka, Phys.org report
Study reveals substantial evidence of holographic universe
A sketch of the timeline of the holographic Universe. Time runs from left to
right. The far left denotes the holographic phase and the image is blurry
because space and time are not yet well defined. At the end of this phase (
denoted by the …more
It was another great year for science, particularly physics, as evidenced by
a study conducte... 阅读全帖 |
|
m****a
发帖数: 604 | 33 Binominal 分布,每次trial要么出现1,要么0的题.
假定预计出现1的事前概率, denoted by p.现在做了n次实验,出现了m次1.请问,出现1
的事后概率, denoted by q,大于事前慨率的可能性是多少? |
|
J*******g
发帖数: 267 | 34
Binominal 分布,每次trial要么出现1,要么0的题.
假定预计出现1的事前概率, denoted by p.现在做了n次实验,出现了m次1.请问,出现1
~~~~~~~~~~~~~~~~~~~~~~~~~~with this
statement, your question is confusing
的事后概率, denoted by q,大于事前慨率的可能性是多少? |
|
b**********7
发帖数: 389 | 35 自己在网上搜到的，没有想法该怎么做，大侠们，给点指点吧
There are a collection of particles. You are given a string of 'L' and 'R's,
where 'L' denote a left moving particle and 'R' denote a right moving
particle. The moving speed is given as another parameter. Multiple particles
could stay on the same position. Give the animation of the moving particles. |
|
s********0
发帖数: 3644 | 36 3/5, based on Bayes update.
let y=1 denotes nurse taking a boy,
x=1 denotes unknown is a boy
P(x=1)=P(x=0)=1/2
P(y=1|x=1)=1/2 and P(y=1|x=0)=1/3
then,
P(x=1|y=1)= { p(y=1|x=1)*p(x=1)} / {p(y=1|x=1)*p(x=1)+ p(y=1|x=0)*p(x=0)}
=1/4/(1/4+1/6) =3/5 |
|
l******i
发帖数: 1404 | 37 我只会最笨的解法，
Step1: Given Y1, Y2 are iid from N(0,1), you can write the pdf of jointly
distribution of (Y1, Y2), denoted by f(y1, y2).
Step2: Change of variable:
X1 = Y1;
X2 = \rho*Y1+((1-\rho^2)^(1/2))*Y2;
Then X1, X2 are two random variable ~ N(0,1) with correlation \rho.
Now the pdf of (X1, X2) should be
f(y1(x1,x2), y2(x1,x2))/abs(Jacobi determinant of the change of variable)
Step3:
cdf of (X1, X2) can be calculate from step2, denoted by F(x1, x2).
Thus F(m,m) is the cdf of max(X1,X2).
Thus F'(... 阅读全帖 |
|
d******e
发帖数: 17 | 38 The first question is simple. Fix one point. Then clockwise there are three
arcs with total length 1. Denote the the length of the three arcs as a,b,c.
Then we have a+b+c=1, a>0, b>0, c>0. Use c=1-a-b, then 0
Now we know the density for a and b is uniform in the triangle area (0
0
the triangle ABC, Denote points A=(0,0), B=(1,0), C=(0,1),D=(1/2,0), E=(0,1/
2), F=(1/2,1/2). See the following figure.
C|\
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q*****g
发帖数: 1568 | 39 Denote {Q_i}= all rational numbers on [0,1].
Denote B_i = (Q_i-r_i, Q_i+r_i), where r_i= 1/2^(i+1).
i=1,2,.....
Let C=I\union of all B_i's, then C is a close set with
measure less than 3/4 but greater than 1/2.
Since the union of all B_i's contains all rational numbers,
the interior of C must be empty. |
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a**f
发帖数: 13 | 40 这个该死敌教授上课从来不将这些，可作业全是这些题，拜托了：
Consider a network where the weight on the link represents the delay
on that link and it varies with time. Suppose that between a specified
source-destination pair (s,d) there are r different paths, P1,
P2,...Pr.
The path lengths are denoted PL1, PL2, ... PLr. Time is measured in
discrete slots from 1 to T. Since the link weights change with time,
the
length of the paths also change with time. The shortest path length
from
s to d at any time t is denoted by Popt(t |
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P***a
发帖数: 9 | 41 Sorry now I believe the variance is 155, and the expectation
is still 12.
I guess this is one of non's homework, right?
*********************************************
Let D be the random variable denoting the days the prisoner
in the cell, and T the random variable denoting the times
the prisoner selecting doors other than Door3.
The answer is E[D]=12 and var[D]=155.
E[D]=E[E[D|T]]
=Sum[ E[D|T=t]*0.8^t*0.2, {t,0,infinity}]
var[D]=E[var[D|T]]+var[E[D|T]]
=Sum[ var[D|T=t]*0.8^t*0.2, {t,0,infinity}] |
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n***u
发帖数: 3 | 42 The pairs (1,2), (3,5), (4,7) etc. are losing positions.
Let us denote L1 = (1,2) - the 1st losing position
L2 = (3,5) - the 2nd losing position
... ...
and, Ln = (An, Bn) - the nth losing position
... ...
then we can find non-recursive formula for computing
sequences {An} and {Bn}.
Let G denote the golden ratio, or (1+sqrt(5))/2.
then An is given by floor(n*G) and Bn is given by
floor(n*G^2). |
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w***t
发帖数: 96 | 43 that's trivial la, since you started from an infinite small triangle abc
inside the curve. enlarge it or move it, it will touch the boundary at one
point. denote it by A. construct a equilateral triangle Axy inside abc.
enlarge Axy with A fixed, it will touch the boundary at another point,
denoted it by B. construct an equilateral triangle ABC inside Axy.
ABC is contained in Axy, contained in abc. it remains in the curve, with
AB on the boundary. quite obvious, and it is strict la. |
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w***t
发帖数: 96 | 44 mark the empty location by a piece "0". any legal move involves
a swap between "0" and its neighbor.
denote P0 to be the x+y of "0".
given an arbitrarty order to the grids on the board. denote the inversion
number of the permutation to be PI.
since any legal move is a swap, PI changes by an odd number.
since any legal move is a move of "0", P0 change by 1.
thus PI+P0 maintains its parity.
a "situation" with odd PI+P0 can not reach a "situtation" with even PI+P0.
vice versa. |
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m******g
发帖数: 14 | 45 来自主题: Statistics版 - 一个概念题 The right way to derive the cdf of Y is as follows:
Fy(y)=P(Y<=y)=P(1-X<=y)=P(X>=1-y)=1-P(X<1-y)=1-(1-y)=y
Note that upper case X and Y denote random variables and lower case y
denote realization of random variables.
All "=" are due to definitions. |
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L*********u
发帖数: 104 | 46 请统计牛人们帮我解一道题：
The data are summarized below for 150 fields examined.
Here, xi denotes the number of cell clumps per field and ni, denotes the
frequency of occurrence of fields of each cell clump count.
xi 0 1 2 3 4 5 6 >=7
ni 6 23 29 31 27 13 8 13
Write a SAS program to perform a chi-square goodness-of-fit at α = .05
to test the hypothesis that the observed counts were drawn from a Poisson
probability distribution.
用proc freq 作chi-square test的话 testp怎么确定？ |
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n**f
发帖数: 121 | 47 I am having great trouble with using Maximum Likelihood to estimate
distribution parameters. I will appreciate if anyone can help me find out
what went wrong.
Assume that I have M iid samples of random vector V, denoted by v_1,v_2,...v
_M. Define random variable X = f(V|theta) where f is function whose closed
form is known but parameter theta is unknown.
I assume X=f(V|theta) follows a lognormal distribution logN(mu,sigma) where
mu and sigma are unknown. My purpose is to JOINTLY estimate theta, ... 阅读全帖 |
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T*******I
发帖数: 5138 | 48 let me ask you several simple questions:
1) Is a likelihood (denoted by L) or an optimizer constructed with sampling
data a random measure or random variable?
The answer is Yes or No. Please select your answer here.
2) Is the set of statistics (denoted by S) of the target model that you try to determine with the L a random measure?
The answer is Yes or No. Please select your answer here.
3) Is the correspondence between the max(L) and the E(S) the expected or
robust or most certain correspondenc... 阅读全帖 |
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w**********y
发帖数: 1691 | 49 jin1 tian1 xian2 de2 dan4 teng2.....
1) Is a likelihood (denoted by L) or an optimizer constructed with sampling
data a random measure or random variable?
~~~~~~~~~~~~~~
RANDOM VARIABLE with fixed measure (ok..I create one new term now..)…random
variable is a function from sample space Omega to real value space R.
Measure must be well defined on the Omega. You understand? There is nothing
called random measure..before you move to the stochastic process..
2) Is the set of statistics (denoted by S... 阅读全帖 |
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T*******I
发帖数: 5138 | 50
jin1 tian1 xian2 de2 dan4 teng2.....
1) Is a likelihood (denoted by L) or an optimizer constructed with sampling
data a random measure or random variable?
~~~~~~~~~~~~~~
RANDOM VARIABLE with fixed measure (ok..I create one new term now..)…random
variable is a function from sample space Omega to real value space R.
Measure must be well defined on the Omega. You understand? There is nothing
called random measure..before you move to the stochastic process..
****************************
What is R h... 阅读全帖 |
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