F****r
发帖数: 151 | 1 X and Z are observed data (factor levels)
Beta are estimated fixed effects.
mu are estimated random effects.
You may notice the difference between beta and mu:
beta's are unknown constants to be estimated. this is the fixed effect.
mu is assumed to follow a distribution. This is the random effect. |
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c****u
发帖数: 243 | 2 ：sample中有人来自同一行业，或相近地区，造成了natural grouping。
终于搜到了random effect的定义，可以用来佐证他人的结论了，
孺子可教啊，不过搜是搜到了，理解不理解就不一定了，
：fixed effects就是说你在严格控制的实验条件下观测了一批数据，而且你认为它 ：
们都
：是符合某种条件的random variables; random effects就是说你测数据时没法严 ：
格控制
：，所以观测结果受某个或某些没控制的random variable(s)影响了。
从这段来看，什么是effect，什么是predictor，估计还是一团浆糊，继续搜索
：把categorical variable叫作dummy variable,不懂latent variable,把random
：error 叫做measurement error都是特定的某类人嘿嘿
看看，通过搜索，知道了这些统计的基本概念，是不是马上就感觉高大上了？
不过以后最好在吹之前搜一下，减少making “don't mislead louzhu” 的comments
Keep sea... 阅读全帖 |
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s*r
发帖数: 2757 | 3 其实教科书上说到fixed random 都是在anova里面引入的，而anova的经典表示方法是y
=u+b+e. y=u+Bx+e是general linear model的写法,这里x就是dummy variable 的
design matrix了。
在anova里理解fix/random effect要容易. b是random effect with p level的话，对
应的B, 在effect coding下，就是一个p-1的vector. 这个vector的每一个element都是
从一个normal distribution里面出来；x总是fixed,因为它代表每个subject的effect
属于哪个level. |
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F8
发帖数: 348 | 4 dataset with
a binary outcome y/n
4 different studies (treated as an 4-level categorical variable) and 3
treatment for each study
in a logistic model
found significant interaction of trt*study
Now try to consider random effect with study level covariate
As I know that nlmixed can only handle two random effects, in this case
Is there a way to fit a random effect model by treating study as a random
effect? |
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w*******y
发帖数: 60932 | 5 Link:
http://itunes.apple.com/app/camera-flash-pro-effects/id38410335
Ever wanted to take a picture with your iPhone, but feared your pictures
wouldnt turn out right? Camera flash pro effects will change the way you use
your camera phone to take pictures. Packed with sophisticated technology
into a razor thin iPhone, this app lets you take perfect pictures every time
, no matter the settings.
This application automatically calculates optimized lighting settings for
each pixel. Amazingly enough, ... 阅读全帖 |
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w*******y
发帖数: 60932 | 9 Link:
http://itunes.apple.com/us/app/mass-effect-3-datapad/id50684790
"TAKE YOUR GALAXY WITH YOU WHEREVER YOU GO! Mass Effect 3 Datapad is the
ultimate companion application for Mass Effect 3, the latest adrenaline-
pumping game from BioWare & Electronic Arts."
Haven't tried it yet, but it's free and apparently you can read a lot of the
codex stuff through it, which could potentially be awesome toilet time
entertainment.
Been looking forward to this, so thought I'd let people know. You can also
... 阅读全帖 |
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l****z
发帖数: 29846 | 11 by Guest Contributor
In yet another attempt at jump starting the economy, the Federal Reserve’s
latest major stimulus action, known as QE3, is likely to have less effect on
the housing market than Fed Chairman Ben Bernake would hope.
QE3, shorthand for the third “quantitative easing” effort undertaken by
the Fed since the onset of the Great Recession, essentially involves the Fed
buying up a great many bonds to increase the money supply and reduce
interest rates. With the first two attempts havi... 阅读全帖 |
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a***x
发帖数: 1303 | 12 NEW TRAFFIC TICKET FINES IN CALIFORNIA
BE VERY CAREFUL OUT THERE!
THE LOS ANGELES TIMES HAS AN ARTICLE ON THE SUBJECT:
"FLOORING IT ON CAR FINES". PASS IT ON TO YOUR FRIENDS AND ACQUAINTANCES !
Subject: Important Notice: HUGE California Traffic Tickets Fines Effective
01/06/2011
Please be extremely careful in your driving and car registration & insurance
matters. State of California is broke and they are trying hard to squeeze
all of us hard to collect money.
Effective immediately, if you do ... 阅读全帖 |
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p********r
发帖数: 539 | 13 同事转发的邮件，在加州的同学开车要小心了
CALIFORNIANS: BE VERY CAREFUL OUT THERE!
THE LOS ANGELES TIMES HAS AN ARTICLE ON THE SUBJECT: "FLOORING IT ON CAR
FINES".
PASS IT ON TO YOUR FRIENDS AND ACQUAINTANCES !
Subject: Important Notice: HUGE California Traffic Tickets Fines Effective
01/06/2012
Please be extremely careful in your driving and car registration & insurance
matters. State of California is broke and they are trying hard to squeeze
all
of us hard to collect money. Effective immediately, if you do n... 阅读全帖 |
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G******i
发帖数: 5226 | 14 ☆─────────────────────────────────────☆
fzzh24 (fzz) 于 (Mon Mar 22 00:27:20 2010, 美东) 提到:
http://www.mitbbs.com/article_t1/JobHunting/31540375_0_1.html
请不要再在站内email我（很少check）
c++ primer (4th)
effective c++ (3rd)
more effective c++ (2nd)
中＆英
c++ primer (4th) 答案
中
需要者，请联系下面这些人
f***********[email protected],q******[email protected],l*****[email protected],
y******[email protected],m******[email protected],l*******[email protected],
y********[email protected],k****[email protected],i******[email protected],
k**********[email protected],simeonyu1981@gm |
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b*******t
发帖数: 39 | 15 今晚在网上买那个传说中的书 effective java, 发现amazon上有两本：
《Effective Java >> (2nd Edition) by Joshua Bloch
<> by Joshua
Bloch
两本书的作者居然都是同一个人，请问究竟该买哪一本？ 哪一本更好？
先谢谢了！！望高人指点。 |
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a**i
发帖数: 1091 | 16 不建议交易打印胖子；胖子是免费的，收费的是服务:
出售/交换物品的名称:
$4 off one Olay effects body wash
物品类别（coupon：mfc等；血糖仪等）:
coupon：mfc
物品来源（报纸夹页，厂家邮寄等）:
报纸夹页
可接受的价格（必须明码标价，必填）:
0.15ea,$4 off one Olay effects body wash. expires 07/31/10.
0.1ea, buy one Olay effects body wash get one free ivory body wash,bar
sosp or hand soap up to $3.00. expires 07/31/10
邮寄损失方式哪方承担（若需邮寄，必填）:
buyer
付款方式说明:
non cc paypal
本贴有效期（必填）:
till gone
联系方式（例： 站内）:
站内 |
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r****t
发帖数: 10904 | 17 【 以下文字转载自 shopping 讨论区 】
发信人: repast (xebec), 信区: shopping
标 题: Is BetaMax VoIP really cheap? True effective rate of Nonoh (zz)
发信站: BBS 未名空间站 (Thu Mar 18 02:40:26 2010, 美东)
http://www.gomobi.org/voip/is-betamax-voip-really-cheap-true-effective-rate-of-nonoh.html
Is BetaMax VoIP really cheap? True effective rate of Nonoh
Since 2006, I became customer of BetaMax, which is famous for introducing a
new brand of VoIP service with low calling rate every a few months. I tried,
as a subscriber, variou |
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s********u
发帖数: 1054 | 18 You may want to know the January effect if you are holding TZA.
By the way, the January effect works even in bear markets.
是不对的。1月效应是说 SMALL
CAP 在1月 很明显的 OUTPEROFMR 大盘。 因为这个JANUARY EFFECT 现在非常多的人知
道了， 我怀疑它提前了， 所以
今年 11月下旬开始 SMALL CAP 就开始 OUTPERFORM 大盘了。 |
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a*****e
发帖数: 51 | 19 dividend from REIT(Real Estate Investment Trust) is effectively connected
income or not effectively connected income for Nonresident Alien ?
[In IRS publication 519] Beneficiary of an estate or trust. If you are the
beneficiary of an estate or trust that is engaged in a trade or business in
the United States, you are treated as being engaged in the same trade or
business.
( if engaged in trade or business in US, It's effectively connected income;
If not engaged in trade or business in US, It's n |
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S********t
发帖数: 4402 | 20 这里是ryan Paul的effective federal tax rate:
http://www.huffingtonpost.com/2012/08/18/mitt-romney-taxes_n_18
"Ryan, R-Wis., paid an effective federal tax rate of 15.9 percent in 2010
and 20 percent in 2011, according to tax returns released by the Romney
campaign Friday evening."
"In 2010, Ryan and his wife reported an adjusted gross income of just over $
215,000. Most of that came from Ryan's congressional salary. They paid more
than $34,000 in federal taxes on that income. They also paid $3,168 in... 阅读全帖 |
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b*******e
发帖数: 91 | 21 大家开车千万小心，这可不是闹着玩的。
HUGE California Traffic Tickets Fines Effective 01/06/2011
Please be extremely careful in your driving and car registration & insurance
matters. State of California is broke and they are trying hard to squeeze
all of us hard to collect money.
Effective immediately, if you do not stop at the red light, be ready to pay
$436 in fines or if you pass a school bus with flashing red signals, you
will be charged $616. The state of California is going for blood, so be
extra carefu... 阅读全帖 |
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b***z
发帖数: 2723 | 22 CALIFORNIANS
BE VERY CAREFUL OUT THERE!
THE LOS ANGELES TIMES HAS AN ARTICLE ON THE SUBJECT: "FLOORING IT ON CAR
FINES".
PASS IT ON TO YOUR FRIENDS AND ACQUAINTANCES !
Subject: Important Notice: HUGE California Traffic Tickets Fines Effective
01/06/2012
Please be extremely careful in your driving and car registration & insurance
matters. State of California is broke and they are trying hard to squeeze
all of us hard to collect money. Effective immediately, if you do not stop
at the red lig... 阅读全帖 |
|
d****d
发帖数: 699 | 23 Signed into law in 2011, but taking effect today are a number of laws
surrounding long gun registration.
A person living in California will not need to register their currently
owned firearms. However, starting today, whenever a long gun is transferred
through a dealer it will automatically be registered to the receiving
individual (PC 11106 and 28160).
For transactions that do not require a dealer, as of today, the recipient of
the long gun will need to register the long gun with the California... 阅读全帖 |
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b********1
发帖数: 308 | 24 Vascular effects of a low-carbohydrate high-protein diet
Communicated by Bruce M. Spiegelman, Harvard Medical School, Boston, MA,
July 17, 2009 (received for review May 15, 2008)
The cardiovascular complications of obesity have prompted interest in
dietary interventions to reduce weight, including low-carbohydrate diets
that are generally high in protein and fat. However, little is known about
the long-term effects of these diets on vascular health. We examined the
cardiovascular effects of a lo |
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p**k
发帖数: 120 | 25 Currently, the state of the art technology for multi-effects is called
amp-modelling. Basically it builds the phisical model of different amps.
Old multi-effects are not capable of this. Digitech used to use tubes in
it's multi-effects (RP-3?, RP-7, RP-12). Now it's top model is RP-2000,
which has no tube but employ amp-modelling and sounds way better than the
previous models. RP-100 use amp-modelling too, so I believe it should be
good. Same for the newer version of zoom-505.
Other top multi-ef |
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c*x
发帖数: 555 | 27 签名是我们日常生活中经常要碰到的，一个好的签名很能体现一个
人的个性修养。在网路空间里，签名不能象现实中那那样随意，因
为这个签名是由 ASCII码构成的，为了很好表达自己的情趣爱好，
在网路里的签名可以利用 ASCII码组合起来，有专业的软件能够做
到这一点。 Email Effects就是一个。与其说它是设计签名的，还
不如说它是全能的ASCII图形设计软件。
下载地址：http://www.sigsoftware.com/emaileffects/index.html
文件名：emefx141.zip
文件长度：395KB
版本号：1.4.1（1998.3）
操作系统：Windows95/NT和Macintosh
授权范围：共享软件（28天试用版本）
解压后，在 Email EffectsArt目录中有四个演示设计。
二、限制
1.Email Effects软件限制每一行的字符是80个，推荐74个，并允许最
多50行字符；
2.Email Effects软件为了签名文件的兼容性，ASCII字符的范围要在
32-127之间；
三、使用
1.EmailEffects使用比较简 |
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P**H
发帖数: 1897 | 28 可能这个问题太菜鸟了。但是实在是没想通。有这么多的effective xxx。为什么编译
器那不就默认most effective。所有non－effective的写法直接warning或者干脆error
不就完了。 |
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h**********a
发帖数: 298 | 29 depending on what kind of fixed effect. For example, if you focus on
mortgage application at the individual level and you want to control for the
neighborhood fixed effect, then you can mean differencing across the
neighborhood to get rid of the FE. So even you only have cross-sectional
data, you can control for the upper level fixed effect. But here the mean
differencing is not same as that in panel data which is for an individual
across time. |
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m********t
发帖数: 121 | 30 Self-fulfilling prophecy是指你预测一件事情会发生，然后你或者别人会有意无意的
迎合这个预测，并使这个事情真的发生。
Pygmalion effect就是一个sfp的例子。Pygmalion原来是古罗马诗人Ovid的一个虚构人
物，他是个雕塑家，并且爱上了自己的作品。爱神Venus受到感动后，把他的雕像变成
真人，成全了他们。后来肖伯纳写了戏剧Pygmalion，主题思想挺象Julia Roberts演的
Pretty Woman，一个教授和他的朋友打赌，要把一个低俗的女人培养成上流社会的形象。
Pygmalion effect又称Rosenthal effect，我的理解是“无中生有无变有”。
Rosenthal做过几个有名的实验，其中一个是这样的：他找了两批智力（就是走鼠迷宫
的能力）相当的老鼠，然后把一批给一拨学生，并骗他们说这批是聪明的老鼠，另一批
给他的另一拨学生，并骗他们说这是批愚笨的老鼠。这些学生训练老鼠一段时间后，他
们对老鼠的智力的认识和rosenthal告诉他们的一模一样。 |
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m*******s
发帖数: 469 | 31 Cost-Effectiveness Analyst/Programmer II/III (AD-23358)
About Us
Fred Hutchinson Cancer Research Center, home of three Nobel laureates,
is an independent, nonprofit research institution dedicated to the
development and advancement of biomedical research to eliminate cancer
and other potentially fatal diseases. Recognized internationally for its
pioneering work in bone-marrow transplantation, the Center’s four
scientific divisions collaborate to form a unique environment for
conducting basic and ... 阅读全帖 |
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r*****l
发帖数: 457 | 32 哪位老大来通俗的解释一下
fixed effect 和 random effect的区别啊。半路出家，老被别人问，自己却讲不清楚 |
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H**********v
发帖数: 169 | 33 One thing you want to keep in mind is that random effect is introduced into
the fixed effect model to solve the problem with independent observations,
so the off-diagonal elements in a variance-covariance matrix don't have to
be all zeros. It will help if you read something about hierarchical linear
model and variance component. |
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w*********a
发帖数: 156 | 34 I am using R nlme package for fitting mixed effects model. What if I have
only random effects, and I don't have any fixed effects, how should I write
the lme formulas?
Thanks~ |
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k*******a
发帖数: 772 | 35 应该是取决于有多少个factor level
fixed effect的话就几个level
random effect的话是从很多level里面随机smaple了一些level |
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g****8
发帖数: 2828 | 36 我觉得是这样的
fixed effect的话residual distribution的mean是变化的。
random effect的话residual distribution的variance是变化的。
mixed 的话，就是都是变化的。
对否？ |
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q**t
发帖数: 36 | 37 Hi All,
I am using lme in R to estimate standard error the random effect.
The output of the StdDev of lme is the SE of the random effects?
lme(y~1, random = ~1| s/p/k )
Random effects:
Formula: ~1 | s
(Intercept)
StdDev: 0.02100801
Formula: ~1 | p %in% s
(Intercept)
StdDev: 0.001980935
Formula: ~1 | k %in% p %in% s
(Intercept) Residual
StdDev: 0.01581869 0.006076241
Number of Observations: 240
Number of Groups:
s
5
p %in% s
... 阅读全帖 |
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m******u
发帖数: 11 | 38 一直搞不清楚，大家帮忙看看我理解的对不对？
linear regression model Y=Beta*X+Error X=(x1,x2,...xp)
如果x1...xp的值全是固定的，叫做fixed effect model
如果x1...xp的值全是随机的，叫做random effect model
如果有的固定，有的随机，叫做mixed effect model
是这样吗？ |
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c***z
发帖数: 6348 | 39 “…the crucial distinction between fixed and
random effects is whether the unobserved
individual effect embodies elements that ar
e correlated with the regressors in the
model, not whether these effects are
stochastic or not” [Green, 2008, p.183] |
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A*******s
发帖数: 3942 | 40 什么时候应该用random effect，什么时候random effect estimate趋近fixed effect
estimate，如何从bias variance trade-off的角度来理解random vs. fixed...这都是
我常问的面试问题。lz搞清楚这些问题就有答案了... |
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i*********o
发帖数: 772 | 41 longitudinal的数据，三个时间点，12岁，14岁，16岁， 重复测量的quantitative
variable, 预测一个binary outcom， 用sex 和一个family index作为cluster.
用了spss做glm，发现age effect 显著。 但是等我将这个数据wide form转换成为long
form以后， 看不到age effect, 因为每个人都是同样的三个年龄点。。。。但事实上
，这个重复测量的变量，是随着年龄变化显著的。
我不知道我把这个问题说清楚没有。。。请熟悉mixed effects logistic regression
model 的达人，给指点迷津。。。谢谢！！ |
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l********m
发帖数: 284 | 42 请问谁能给解释一下 fix effect 和 random effect 的区别？ |
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C******g
发帖数: 2930 | 43 Electronic Arts confirmed this morning that Mass Effect 3 will launch
simultaneously on PlayStation 3, Xbox 360 and PC in holiday 2011. This marks
the first time the franchise will set foot on all consoles on the same day.
The first installment is still not available on the PS3, while the
critically acclaimed sequel will "save the lost" on Sony's console beginning
January 18.
Mass Effect 3 was officially unveiled over the weekend at the 2010 Spike
VGAs. As evidenced by the trailer and the descri... 阅读全帖 |
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w*******y
发帖数: 60932 | 44 Mass Effect 2: Lair of the Shadow Broker 280 MSP 50% Off
Mass Effect 2: Arrival 400 MSP 50% Off
Mass Effect 2: Kasumi - Stolen Memory 280 MSP 50% Off
The Deal of the Week deals are for Xbox Live Gold Members only.
Today - ?? Change your gamertag for 560 MSP 30% Off
Microsoft Studios Game Add On Sales Up to 50% Off on varying titles. (List
coming soon)
|
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w*******y
发帖数: 60932 | 45 Amazon
Mass Effect 2 (PC Digital Download)
= $5
Enjoy savings of 75% on Mass Effect 2.
This week save 75% on the digital download of Mass Effect 2 Pick up this
popular space-based role-playing game for just $4.99 and embark on a
thrilling stand-alone adventure this holiday season.
Also
Order this product between now and 11/28/2011 and receive a $5 promotional
credit good towards any of the 2011 bestselling Video Game Download like "
Battlefield 3" or "Call of Duty: Modern Warfare 3" in the m... 阅读全帖 |
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w*******y
发帖数: 60932 | 46 Hey guys I was just looking through Best Buy's website and they still have
available Mass Effect 3:N7 Collectors Edition to be able to pre-order with
free shipping or store pick up on release date. This edition for XBOX 360
has been sold out everywhere, hard to find and copies are retailing right
now for about $150 in eBay. Definitely worth picking up a few, resell, or
if you been looking for one.
Link:
http://www.bestbuy.com/site/Mass Effect 3: N7 Collector's Edition - Xbox 360/2889044.p?skuI... 阅读全帖 |
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c********g
发帖数: 18 | 47 ◇◇新语丝(www.xys.org)(xys4.dxiong.com)(www.xinyusi.info)(xys2.dropin.org)
◇◇
戳穿中国工程院院士方滨兴在google事件中对美国chilling effects组织的诬蔑
作者：北大飞
google退出中国事件正在发酵。今天到博士生休息室吃饭，正好看见ccav4
的今日关注节目，GFW之父方滨兴和清华五毛教授孙哲被请来谈谷歌问题。这次
节目视频在网络上很容易找到：
http://space.tv.cctv.com/video/VIDE1269355265427885
谷歌事件的核心自然就是互联网审查，有关方面一直宣称，互联网审查所有
国家都有。但这次方滨兴提出了一个新的材料来论证：谷歌自己就在十分积极的
进行互联网审查，还说的十分具体，这个审查是通过一个叫做“chilling
effects”的计划实行的。从视频的9：05开始是方滨兴关于此事的说法（方指方
滨兴，主指主持人）：
＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊
方：互联网审查其实全世界都有，比如说谷歌，谷歌执行了一个chilling
effe |
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g***j
发帖数: 40861 | 48 【 以下文字转载自 Joke 讨论区 】
发信人: lqm1989 (老球迷), 信区: Joke
标 题: The Jeremy Lin Effect (转载)
发信站: BBS 未名空间站 (Sun Feb 12 11:10:36 2012, 美东)
发信人: Midelu (57710), 信区: Basketball
标 题: The Jeremy Lin Effect
发信站: BBS 未名空间站 (Sun Feb 12 00:37:36 2012, 美东) |
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w*********r
发帖数: 42116 | 49 EFFECT是个名词，不存在好、坏、强、弱的概念。不是文盲用名词时会在名词前加上形
容词的。 |
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