l*h
发帖数: 4124 | 1 many transcription factors have quite high expression levels. i am not
talking about general transcription factors though. |
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p*****u
发帖数: 191 | 2 见文
Impact fact-or fiction?
http://www.nature.com/emboj/journal/vaop/ncurrent/full/emboj201
The Journal Impact Factor dominates research assessment in many disciplines
and in many countries. While research assessment will always have to rely to
some extent on quantitative, standardized metrics, the focus on this single
measure has gone so far as to hamper and distort scientific research. The
Declaration on Research Assessment (DORA), signed by influential journals,
funders, academic institutions ... 阅读全帖 |
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p*********e
发帖数: 60 | 3 Sent to sononias (the first guy response)
Thanks and good luck to everyone
【 以下文字转载自 I140 讨论区 】
发信人: picnicbbqce (old boy), 信区: I140
标 题: 攒人品：impact factor 2点多审稿机会
发信站: BBS 未名空间站 (Tue Jun 18 09:39:32 2013, 美东)
攒人品：impact factor 2点多审稿机会
肝癌方向，non-coding RNA background最好。
请寄CV站内。
谢谢 |
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F*Q
发帖数: 3259 | 4 即使是CNS还要祈祷那不是杜撰出来的结果、或技术假象。真正有意义的工作是要被别
人重复出来并被推广。如果能那样的话，不是CNS也胜过CNS。
所以说个人真正要关心的是自己文章的impact factor，而不是杂志的impact factor。 |
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w********t
发帖数: 530 | 5 在做FF THREE FACTORS MODEL 时应该用哪一个.
谢谢 |
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b********t
发帖数: 33 | 6 上面有介绍的，仔细看看
我记得好像是factors |
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b********t
发帖数: 33 | 7 我怎么没看到有benchmark factors？ |
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c*****u
发帖数: 4 | 8 最近读了几篇实证文章，发现这个模型用的很多，很想学习一下,感觉这个方法要
是掌握了，应该可以攒出篇文章来。看了一篇paper，这个模型应该是来自于统计中的
因子分析（Factor Analysis)，我理解就是假设这个不可观测到的因子有一个滞后项，
当然后来又有很多变形。
我主要迷惑是：这个模型跟Kalman filter，state-space model是什么关系？这两
个模型我只是大概知道一点，但感觉好像有关系（有篇文章里说是用Kalman filter方
法来估计这个dynamic factor model）。估计这种模型的常用软件是什么？
请高手指点，或者应该看哪些材料就可以更清楚？不盛感激！
|
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w****a
发帖数: 155 | 9 Bias-variance tradeoff 和 Bayes factor 是用来衡量模型的复杂度和预测精度的一
个指标，但好像Bayes factor也可以用来比较不同的模型。我想知道它们的不同。 |
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r*****g
发帖数: 8 | 10 【 以下文字转载自 Business 讨论区 】
发信人: Ranking (ABC), 信区: Business
标 题: Top 300 Journals (All Fields) based on Impact Factors
发信站: BBS 未名空间站 (Sun Jan 4 22:13:19 2009)
Top 300 Journals (All Fields) based on Impact Factors
Journal (estimated (Boldface indicates that from 1998- Rank ISI says
business is primary) 2007 data)
1 Science 27.346
2 Annual Rev of Psychol 12.729
3 Psychol Bull 10.774
4 Psychol Rev 7.896
5 Amer Psychologist
6.924 6 Advanc Expertl Soc Psychol 6.618
7 Harvard Law Rev 6.141
8 J Expert |
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L***d
发帖数: 154 | 11 His success in application is almost a certainty based on three factors:
1. Summa Cum Laude from a decent university in US;
2. Decent LSAT score;
3. President of the CGSA.
I believe the last one is the most critical factor in his getting the
scholarship from UMich.
It's irrefutable that he is pretty good. On the other hand, he likely
benefited from sources to which most people don't have access as to how to
walk this path. A perspicacious pointer at the right time makes all the
difference.
othe |
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l*****s
发帖数: 16 | 12 He was saying those 3 factors led to littlenorth's so successful application-7
acceptance and 5 waiting list/deferal from the top 12. He didn't say someone
had to have all 3 to get into a top law school. Your example was in agreement
with factor 2 and didn't contradict what he said at all.
not
improve
into |
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m******e
发帖数: 432 | 13 根据JPCC ２００９， １１３， ２０５２１－２０５２６的定义：surface roughness
factor (SRF, defined as the ratio of the total semiconductor surface area
to the nominal planar substrate area)。对于我的实验，光总能１００％覆盖
substrate，这样光的入射角度似乎没有关系。
IUPAC定义：roughness factor (rugosity) (of a surface)
The ratio: fr = Ar／Ag；where Ar is the real (true, actual) surface (
interface) area and Ag is the
geometric surface (interface) area.什么是geometric surface (interface) area
？愿闻其详！ |
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m******e
发帖数: 432 | 14 Chem Mater 2010, ASAP paper: TiO2 Branched Nanostructure Electrodes
Synthesized by Seeding Method for Dye-Sensitized Solar Cells
J. Phys. Chem. B 2003, 107(31), 7759–7767
上面两篇文章的定义是：The roughness factor, defined as units of surface area
per micrometer of the film thickness这样roughness factor就是有单位的参数了
。我真是很困惑呀! |
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v**9
发帖数: 8 | 15 有没有人做药物释放时用Prism计算f factor （similarity factor)?
可不可以给我一个template?
我用excel做出的结果，全都在98， 99左右。。。
拜托了 |
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g******9
发帖数: 11 | 16 请问超晶格中声子振动(Raman或DECP：Displacive Excitation of Coherent Phonons)
的品质因子（Q factor）怎么计算？
比方说 GaAs/AlGaAS 超晶格中的quality factor。
能大概说一下计算步骤或推荐相关的论文、书籍么？谢谢 |
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a*****e
发帖数: 4577 | 17 原来一直都是算的semiconductor
刚刚看quantum espresso，发现对于metal用到了一个smearing的概念
比如
gaussian smearing for metals、marzari-vanderbilt
还必须给出一个smearing factor
请问这个smearing的重要性在什么地方
如何合适的选取smearing factor
麻烦牛人给讲解一下，或者给一篇好一点的文献吧。
谢谢 |
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h****g
发帖数: 28 | 18 介绍一下full information factor analysis（FIFA）吧
今天看到一文章说classical linear factor analysis（CLFA）不适合于人格测验的研
究。
说FIFA才适合 |
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A***A
发帖数: 98 | 19 i think what you're talking about is full-information item factor analysis.
it is basically a multidimensional item response theory model.
an introductory reference is Bock, Gibbons, & Muraki (1988).
Bock, R.D., Gibbons, R. & Muraki, E. (1988). Full-information item factor
analysis. Applied Psychological Measurement, 12, 261-280.
full-information means that you're using the observed item response patterns (
hence the full cross-classifications of the underlying contingency table) to
estimate the |
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x**c
发帖数: 1435 | 20 I have three stress factors in life. number 1, my husband does not work. 2.
my parents are in nursing home in China, I feel I have abandoned them. 3.
pressure from work. I feel depressed again because I feel there is nothing i
can do to change any of the stress factors. |
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j*******d
发帖数: 14 | 21 Assume that the returns of individual securities are generated by the
following two-factor model:
Rit = E(Rit) + (Betai1)f1t + (Betai2)f2t
where Rit is the return for security i at time t, and f1t and f2t are two
factors with zero expectation and zero correlation between them. In
addition, assume that there is a capital market with four securities,
where each one has the following characteristics:
Security beta1 beta2 E(Rit)
1 1.0 2.0 20%
2 |
|
发帖数: 1 | 22 在使用上有没有什么不同？哪种用得比较多一些？
如果两个signal分别是用这两种factor得出来的，放在一起用会不会有问题？ |
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d********t
发帖数: 9628 | 23 price不就是time series factor吗 |
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s****n
发帖数: 14 | 24 sorry for being late. the 2001 impact factor is as follows:
Biophysical Journal 4.636
Journal of the american chemical society 6.079
Journal of chemical physics 3.147
Physical review letter 6.668
chemical physics letters 2.364
Biochemistry 4.114
Journal of medicinal chemistry 4.139
Journal of biomolecular structure & dynamics 1.243
Angew chemie international edition 8.255
by the way the Nucleic Acids Res. has a fairly high impact factor of 6.373...
good....
furthermore, i don't i woul |
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r*****g
发帖数: 8 | 25 【 以下文字转载自 Business 讨论区 】
发信人: Ranking (ABC), 信区: Business
标 题: Top 300 Journals (All Fields) based on Impact Factors
发信站: BBS 未名空间站 (Sun Jan 4 22:13:19 2009)
Top 300 Journals (All Fields) based on Impact Factors
Journal (estimated (Boldface indicates that from 1998- Rank ISI says
business is primary) 2007 data)
1 Science 27.346
2 Annual Rev of Psychol 12.729
3 Psychol Bull 10.774
4 Psychol Rev 7.896
5 Amer Psychologist
6.924 6 Advanc Expertl Soc Psychol 6.618
7 Harvard Law Rev 6.141
8 J Expert |
|
g******9
发帖数: 11 | 26 请问超晶格中声子振动(Raman或DECP：Displacive Excitation of Coherent Phonons)
的品质因子（Q factor）怎么计算？
比方说 GaAs/AlGaAS 超晶格中的quality factor。
能大概说一下计算步骤或推荐相关的论文、书籍么？谢谢 |
|
P**********e
发帖数: 2964 | 27 ☆─────────────────────────────────────☆
Ranking (ABC) 于 (Sun Jan 4 22:16:34 2009) 提到:
发信人: Ranking (ABC), 信区: Business
标 题: Top 300 Journals (All Fields) based on Impact Factors
发信站: BBS 未名空间站 (Sun Jan 4 22:13:19 2009)
Top 300 Journals (All Fields) based on Impact Factors
Journal (estimated (Boldface indicates that from 1998- Rank ISI says
business is primary) 2007 data)
1 Science 27.346
2 Annual Rev of Psychol 12.729
3 Psychol Bull 10.774
4 Psychol Rev 7.896
5 Amer Psychologist
6.924 6 |
|
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A*******r
发帖数: 194 | 29 variable 多的话用PLS or PCA 搞出来的Covariance块头大不说也不正定吧。
这是typical的情况合用SVM吧。
还有
可不可以用pca, 然后再用stepwise 或者其他方法选factor
PCA出来的factor都independent了还要stepwise干什么？ |
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T******r
发帖数: 265 | 30 PCA出来的factor都independent了还要stepwise干什么？
我是想选出和dependant variable最相关的factors.我的理解有错吗？
这个independant 指得是orthogonal 吗？
为什么需要正定呢？
还有哪位高手看看我9楼的问题呢？ |
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p*p
发帖数: 492 | 31 我想把那10来个variable归成几类，每一类算一个某某factor
factor analysis不就是用来发现隐藏的因素的么？ |
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p*p
发帖数: 492 | 32 is that there are several variables included in one factor? so i consider
this is to group the variables into different factors. |
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w****a
发帖数: 155 | 33 Bias-variance tradeoff 和 Bayes factor 是用来衡量模型的复杂度和预测精度的一个指标，但好像Bayes factor也可以用来比较不同的模型。我想知道它们的不同。 |
|
o******6
发帖数: 538 | 34 ☆─────────────────────────────────────☆
sandbird (sandbird) 于 (Thu Mar 13 18:14:02 2008) 提到:
想请教大家一个我在作factor analysis 遇到的问题。
如果我有20个变量，大多数是quantitative traits, 有几个是rate, 还有几个是
binary variables. 也就是说变量的measure 的 scale 不同，在这种情况下，是否需
要做前处理，然后再作 exploratory factor analysis, 还是可以直接作。
如果直接作，结果会不会不可靠？
☆─────────────────────────────────────☆
sandbird (sandbird) 于 (Thu Mar 13 21:51:23 2008) 提到:
怎么没有人回答。
☆─────────────────────────────────────☆
ifyoudie (dy) 于 (Fri Mar 14 11:17:12 2008) 提到: |
|
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a*****3
发帖数: 601 | 36 应该是 factor analysis吧？
proc factor data = method= priors= outstat=
var=
很复杂。
赏个铜板吧 -想想晚上吃什么。 |
|
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l**********g
发帖数: 426 | 38 以前面过这个问题，答得很烂。如果是在多个factor影响下预测单个变量，可以用
GLM。感觉如果是想寻求两个变量之间的关系，不是很好解释。
例如：有很多学生样本。我们想知道Average hours in front of computer
和GPA的关系。然后这些学生住在10个不同的宿舍：Room1, Room2, ...
Room10。他们来自5个不同的国家，Country1, Country2, ... Country5。
现在想知道Room和Country这两个factor，对于average hours for
computer和GPA之间的关系有什么影响？
我想到的一种方法是用GLM，把GPA作为dependent variable，把#hours for
computer, Room, Country, Room*Country(interaction)作为
independent variable。但不知如何解释。
非常感谢！ |
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n*********e
发帖数: 318 | 39 what is use of factor in R?
it seems a troublesome data type since text data will be read into factor
unless you specify stringsAsFactor=F.
Thanks. |
|
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g*****o
发帖数: 812 | 41 用bayesian factor 而不是两个后验分布的比值呢？当然在算bayesian factor的时候
，积分里也是用到了先验分布的，但是感觉还是两个后验分布对比才比较正常啊 |
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d********4
发帖数: 1710 | 42 【 以下文字转载自 WaterWorld 讨论区 】
发信人: joycee (买买提头号女魔头), 信区: WaterWorld
标 题: X Factor有个装嫩日本校服装的52岁中国大妈 (转载)
发信站: BBS 未名空间站 (Wed Oct 17 00:09:38 2012, 美东)
发信人: joycee (买买提头号女魔头), 信区: Joke
标 题: X Factor有个装嫩日本校服装的52岁中国大妈
发信站: BBS 未名空间站 (Wed Oct 17 00:08:19 2012, 美东)
找到妖孽的视频了，我的妈呀。
http://www.youtube.com/watch?v=WrhRaaK0pss&feature=related |
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w*s
发帖数: 7227 | 43 【 以下文字转载自 Living 讨论区 】
发信人: wds (大盘5000不是梦), 信区: Living
标 题: 带small form factor pc回国如何减少被海关查的机会？
发信站: BBS 未名空间站 (Fri Nov 13 20:07:50 2015, 美东)
如果笔记本查到就直接开机，desktop还要找屏幕很费时间。
是随身带好，就比笔记本大一点点，还是装箱托运好？
要不要把硬盘拿掉？
谢谢！ |
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f*******a
发帖数: 59 | 44 【 以下文字转载自 USANews 讨论区 】
发信人: flycanada (flycanada), 信区: USANews
标 题: Rename the metric for measuring delusion by factors of "trumps"
发信站: BBS 未名空间站 (Tue Oct 11 15:41:04 2016, 美东)
However a unit baseline is much too large for normal human usage.
For example, If a guy thinks his mullet is sexy, that would have to rate at
about 20 microtrumps on your proposed scale, right? So most human delusions
would rank in the micotrump range. "Paul is dead" (look it up, youngsters)
could reasonably make it up... 阅读全帖 |
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g********d
发帖数: 4174 | 45 Posted on Advocate.com October 01, 2010
Annise Parker Raises Houston's "Coolness Factor"
By Advocate.com Editors
In an interview withBusiness Week, Houston mayor Annise Parker says her
position "has given me a fantastic opportunity to change how people think
about my city."
"When I was sworn in as mayor of Houston, the media attention worldwide was
overwhelming," Parker said. "'Houston elected a lesbian? Houston?' I was
even on the front page of the Times of India. It has given me a fantastic |
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g********d
发帖数: 4174 | 46 "I take a lot of credit
for raising Houston's coolness factor." 说的好，不用谦虚。那天还在想她会不会
成为TX州长然后总统？ |
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j*****v
发帖数: 7717 | 47 Yes, race is a factor. Otherwise she would not be interviewed on CNN |
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k*n
发帖数: 1203 | 48 If race is not a factor, who's going to vote for Obama? |
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