o**x
发帖数: 901 | 1 嗯。。。我对年轻人们的建议是,efficient frontier上的每个点都试一遍，低风险的
，高风险的，心灵美的，外表美的，缺胳膊的，少腿的。。。萝卜白菜，总得都吃一遍
才能知道哪个适合你吧？？
这个幸福指数和风险不是呈线性关系的，而是边际效应递减的。别看就是多出那5%的
happiness，我相信很多人还是愿意头破血流的冲上去的。。。反正我已经成为您教材
里的经典反面个例了。
只需承担50%的风险就能达到65%的幸福指数，像我（或OXOX?）等好色之徒承担了80%的
风险却换来只多出5个百分点的幸福指数，且这5个百分点也会随着时间而消逝... |
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t*****m
发帖数: 254 | 2 我吃了冷冻pizza, 非常地energy-efficient. |
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b******k
发帖数: 1874 | 3 energy efficient？你是指做了很多的pizza，冻了，解冻，很省事，还是 只是说你现
在很有力了？
我又out了，哈 |
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T********l
发帖数: 1670 | 4 pizza好像并不energy-efficient，豁面，baking，freezing，defrost，re-baking每
一步都需要energy？？？？？ |
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p**o
发帖数: 3409 | 5 【 以下文字转载自 Mathematics 讨论区 】
发信人: pulo (普罗), 信区: Mathematics
标 题: How to efficiently enumerate triangles in a large network?
发信站: BBS 未名空间站 (Mon Aug 16 11:12:59 2010, 美东)
无向图，10万个节点，50万条边。
已经在Matlab中用spconvert读入成上三角的0-1稀疏方阵A。
请问如何迅速找齐满足以下条件的所有(i,j,k)？
i
A(i,j)=A(j,k)=A(i,k)=1
三个for循环蛮干的话时间复杂度是节点数的立方，有没有快一些的算法？ |
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Z*****Z
发帖数: 723 | 6 问题：一个enum有多大？我前一阵子序列化过一个enum，好像挺大的。。。
efficient的话，一个0到52之间的整数就能表示一张牌，一个byte。。。。 |
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Z*****Z
发帖数: 723 | 7 我来逗逗闷子吧，别说Java了，拣一门你最熟练最顺手的语言，或者自然语言也行，写
这个最efficient的card应该怎么写？然后我们可以把它改成Java。。。 |
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x********g
发帖数: 100 | 8 In most terminals, all commands and results are stacked stacked up, make it
not easy to find things, even if you can change the prompt statement (PS) to
make it distinct from the others. In my opinion, a more efficient user
interface could be like this:
1) The PS is fixed on the first line.
2) You enter a command, and the result shows below the PS.
3) When you are typing another command, the result of the previous command
stays until you type Enter, whereas the screen is cleared and shows the
re |
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D******n
发帖数: 2836 | 9 A question about server efficiency.
In our company we run a specific software everyday to do data manipulation
and statistical analysis. All the data can only be written to a common
folder for "security" reason. Save for the chaos caused by being able to
delete each other's files, will this be an I/O nightmare compared to being
able to spread out the data files into different folders(on the same or
different stripes)?
Thanks! |
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D******n
发帖数: 2836 | 10 A question about server efficiency.
In our company we run a specific software everyday to do data manipulation
and statistical analysis. All the data can only be written to a common
folder for "security" reason. Save for the chaos caused by being able to
delete each other's files, will this be an I/O nightmare compared to being
able to spread out the data files into different folders(on the same or
different stripes)?
Thanks! |
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s*****t
发帖数: 89 | 11 没看懂需求，不知道efficiency说的是哪个指标，如果要提高IO性能的话要看数据类型
和应用类型的吧？最好能合并小文件并把文件根据应用需求分布到不同磁盘上的不同文
件夹里面。没有确切应用上下文什么感觉都不好说 |
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g*****n
发帖数: 56 | 12 could anyone give me some examples that C is more efficient than C++ or a link
with detail
comparision? thanks. |
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j*****k
发帖数: 1198 | 13 Eg: BST1 B1, BST2 B2.
Choose the root which has bigger value to be the new BST's root,
then insert each node of the other BST into the new BST. If B1
has m nodes, B2 has n modes, it takes O(mn). That's not good. Is
there other more efficient way? |
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q****2
发帖数: 7 | 14 Please give some ideas how to answer this question, thanks in advance!!
Give efficient algorithms for finding the largest k values (in order) out of
a set of n, using comparisons only (e.g. no hashing), in the case where: (a
) k = 3 (b) k = n/2; (c) k = log(n). (You can use a different algorithm for
each case.) State the asymptotic worst-case running time of your algorithms. |
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f*****e
发帖数: 2992 | 15 有什么efficient方法吗？像next_permutation一样？ |
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t***q
发帖数: 418 | 16 那你觉得，我这个PYTHON DICTIONARY 的用法有什么问题？你能举个EFFICIENT 的例子
吗？多谢！ |
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t***q
发帖数: 418 | 17 嗨，后来，我一同学，用R 写了一个程序。那样的数据量，30多分钟就运行完了。
看来，我真是应该好好检讨一下，自己的CODE 不EFFICIENT. 多谢诸位。 |
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a*****g
发帖数: 19398 | 18 and Development
Abstract
The choice of an efficient document preparation system is an important
decision for
any academic researcher. To assist the research community, we report a
software
usability study in which 40 researchers across different disciplines
prepared
scholarly texts with either Microsoft Word or LaTeX. The probe texts
included
simple continuous text, text with tables and subheadings, and complex text
with
several mathematical equations. We show that LaTeX users were slower than
W... 阅读全帖 |
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a*****g
发帖数: 19398 | 19 and Development
Abstract
The choice of an efficient document preparation system is an important
decision for
any academic researcher. To assist the research community, we report a
software
usability study in which 40 researchers across different disciplines
prepared
scholarly texts with either Microsoft Word or LaTeX. The probe texts
included
simple continuous text, text with tables and subheadings, and complex text
with
several mathematical equations. We show that LaTeX users were slower than
W... 阅读全帖 |
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m******n
发帖数: 194 | 20 everything you mentioned is considered, good comments, esp the last one
for example, unknown SNP/mutation in your primer region will
certainly change PCR efficiency. Or DNA modification might change
primer binding. If you are a biologist, you would think of these first.
DNA 2nd structure is certainly another thing to consider, esp. since my
amplicons are short (~70-150 bp). My student spent quite some time on
this aspect (quite some $ on software as well) and results are dubious.
For DNA 2nd str |
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t**s
发帖数: 284 | 21 I have been working on splicing of a weak intron for some times.
When I tried to measure the portion of spliced mRNA by RT-PCR,
I actually observed similar phenomina as you got here.
In my assay, I place 2 primers around the intron (89bp) to run RT-PCR,
hoping that by measuring the ratio of the two PCR products (spliced
and unspliced) on agarose gel, I could get the efficiency of the splicing.
But we found that is not really true. When we compare PCR assay with
RNase Protection Assay, obviously |
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s****z
发帖数: 50 | 22 有一个gene，如果把它knock down后细胞就会死掉
如果用shRNA做knock down实验，如何验证knock down efficiency呢？
谢谢！ |
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n****0
发帖数: 696 | 23 比较不同genotype在不同处理下的基因表达差异，一般assume efficiency=2就可以么
？ |
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A******y
发帖数: 2041 | 24 You should just check the linear range and efficiency with serial dilution.
You should do it already as a good lab practice for real-time PCR. |
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n****0
发帖数: 696 | 25 I have many genes. Should I check the efficiencies individually?
And I have some other questions. Would the primer dimers cause a lot of
problems?
I used RT-PCR to check the primers, some of them have faint unspecific bands
. And I used 38 cycles. My senior said it is not a problem in real time
since we won't use the signal of this high cycle and it is relative. Is it
true?
If the melt curve give a good single peak, can I assume the primer dimers
and unspecific product signal is too low and won'... 阅读全帖 |
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h******y
发帖数: 351 | 26 First, you dilution range is not big enough (8x) to get an accurate estimate
of the PCR efficiency.
Second, your samples are different, even though they are all cDNA. Keep in
mind that they come from different cells. |
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z********o
发帖数: 137 | 27 大家遇到这样的情况吗？在送totalRNA去做microarray之前做qPCR确定了
knockdown的效率有73%， 但是micoarray做出来只有～50%。后来又去做了RNAseq，结
果也差不多。microarray和RNAseq的结果看，这个被knockdown的factor几乎没引起什
么基因表达的变化。但是在蛋白水平上，这个factor几乎被knockdown清除了。不知道
是怎么回事？是不是这个factor根本不值得做，还是在我这类细胞里不是作为转录因子
起作用的？
还有，我的RNAseq的library是让学校的测序部门做的，然后他们再测序。测
100mer/reads，一共测了30 million。但是得降到70mer时mapping efficiency才只有
～50%左右。那这个测序结果好吗？可信吗？我刚接触这些东西，分析也是一个专门做
bioinformatics的韩国学生帮我分析的。
希望各位能人帮我分析下这些问题。谢谢呀！ |
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H*****e
发帖数: 120 | 28 Whenever I review manuscript with knockdown. I have two requirements:
1. By multiple sequences.
2. By western-blot. Even you can detect it by array or PCR, I still ask you
to do it because I feel I am being fooled. Many knockdown in my hand is
partial blocking translation + partial inducing degradation.
For certain cases, I ask for stable lines not oligos. For these reasons, I
had rejected quite few manuscripts from China. They like to show knockdown
using oligos and like to show knockdown ef... 阅读全帖 |
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Z******5
发帖数: 435 | 29 基本都不做的吧。一般就是设计至少两对引物就OK了。efficiency默认是2. |
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V******t
发帖数: 444 | 30 这能准确吗
我用了文献的引物 和 primer bank的引物，测试都是1.6-1.8。
看表达变化，加上efficiency，跟不加，计算出来的是有些差别的呐。 |
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A******y
发帖数: 2041 | 31 No, you have to do it at least when you get the primers in to make sure they
are good, linear, and have a good range. If you do delta delta C(t) method
, you don't have to do it every run but checking is definitely necessary.
I know a lot of people don't do it, that's why you see NCS paper with mouse
primers using in human samples or primers flat out don't work. I know a big
lab in Harvard don't check their primers because half of their primers are
not efficient nor linear in their NCS papers.... 阅读全帖 |
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t******k
发帖数: 599 | 32 原来大家做实验都这么粗放的呀。。。。
[在 Zifeng85 (Zifeng9527) 的大作中提到：]
：基本都不做的吧。一般就是设计至少两对引物就OK了。efficiency默认是2. |
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Z******5
发帖数: 435 | 33 基本都不做的吧。一般就是设计至少两对引物就OK了。efficiency默认是2. |
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V******t
发帖数: 444 | 34 这能准确吗
我用了文献的引物 和 primer bank的引物，测试都是1.6-1.8。
看表达变化，加上efficiency，跟不加，计算出来的是有些差别的呐。 |
|
A******y
发帖数: 2041 | 35 No, you have to do it at least when you get the primers in to make sure they
are good, linear, and have a good range. If you do delta delta C(t) method
, you don't have to do it every run but checking is definitely necessary.
I know a lot of people don't do it, that's why you see NCS paper with mouse
primers using in human samples or primers flat out don't work. I know a big
lab in Harvard don't check their primers because half of their primers are
not efficient nor linear in their NCS papers.... 阅读全帖 |
|
t******k
发帖数: 599 | 36 原来大家做实验都这么粗放的呀。。。。
[在 Zifeng85 (Zifeng9527) 的大作中提到：]
：基本都不做的吧。一般就是设计至少两对引物就OK了。efficiency默认是2. |
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j*****j
发帖数: 1 | 37 Has anybody compared the relative efficiency of these two? I'm referring to
general matrix calculations. Thank you very much! |
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q**i
发帖数: 174 | 38 assume that an economy with various cycles that cannot
be avoided. However, investors don't know when a cycle will
happen and how long it will lasts when it happens (a cycle
cannot last forever).
How would stock prices behave if the market is efficient?
How would stock prices behave if the investors have limited
life span?
How would stock prices behave if we do no thave a perfect
signal on if a cycle has taken place? |
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t***t
发帖数: 139 | 39 Energy Efficiency in Wireless Networks
O Jumira, S Zeadally
Wiley
多谢 |
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y***c
发帖数: 676 | 40 本文有一表格，无法原样贴出来，请到原文网上察看。
Improving Communication Skills Enhances Efficiency and Patient-Clinician
Relationships
source: http://www.medscape.com/viewarticle/578361?src=mp&spon=25&uac=118690CZ
Roxanne Nelson
July 31, 2008 — Clinicians are increasingly challenged to provide high-
quality care in the limited amount of time allotted for patient visits, and
insufficient time with patients is frequently cited as a major cause of poor
communication. However, researchers report that building a rapport,
c |
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a****o
发帖数: 124 | 41 【 以下文字转载自 Sociology 讨论区 】
发信人: AMDPro (如梦令), 信区: Sociology
标 题: legitimacy 应该怎么翻译？ 特别是和efficiency比较的时候。
发信站: BBS 未名空间站 (Wed Mar 19 13:49:01 2008)
看DiMaggio & Powell的文章时忽然想到的。 英文的意思好理解。 |
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a**********1
发帖数: 148 | 42 these two words are quite different ba....legitimacy=合法性，efficiency=效率 |
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x****x
发帖数: 87 | 43 Efficient Methods for Valuing Interest Rate Derivatives
Series: Springer Finance
Pelsser, Antoon
2000, XII, 184 p., Uncorr. 3rd printing, Hardcover
ISBN: 978-1-85233-304-1
谁有这本书啊，我要定价一个产品
I also want to price CMS spread range accrual swap,
the point is to estimate the probability, Prob( CMS 10Y - CMS 2Y<-0.1%)=?
would you so kind give me any hints if you got any idea ?
thanks a lot, |
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d**s
发帖数: 920 | 44 An investment question, are future and commodities market efficient ?
Can anyone share some lights on this ?
Thanks. |
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b***k
发帖数: 2673 | 45 ☆─────────────────────────────────────☆
days (count+days) 于 (Thu Jun 19 19:32:07 2008) 提到:
Hi, All:
I have always been puzzled with Efficient market Hypothesis(EMH) . My
understanding of EMH is that we can NOT generally beat market in
long term using whatever information (depending on which form of
EMH we are talking). I do not know what they mean "market" in EMH.
For example, I have been actively trading one solar energy stock.
Does EMH imply that:
1. I cannot beat the segment index of sol |
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l**********n
发帖数: 72 | 46 From Heisenberg uncertainty principle, you could do an order of magnitude
estimation. The linewidth should be around 10 kHz. The quantum efficency is
basically how much you get vs. how much you pump.
So, the triplet life time determines the natural linewidth and the quantum
efficiency gives you the comparable peak value of the absorption spectrum. |
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c****e
发帖数: 59 | 47 Efficient Way to Learn SAS® with Virtually No Cost
Mirjana Stojanovic, Chapel Hill, NC
ABSTRACT
Often people ask how, “How can I learn SAS?” This paper is intended to help
answer this question by providing an extensive list of web resources that I
accumulated while I was unemployed and pursuing additional SAS training. I
realize that it is not enough to just read about SAS programming. Experience
with SAS software is necessary for a clear understanding of the material
presented, especial |
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x******n
发帖数: 173 | 48 *the question might not be the exact
In which situation, SELECT is more efficient than IF/THEN ELSE?
A. In the small amount selected data which is randomly distributed for
numeric variables.
B. In the small amount selected data which is uniformly distributed for
numeric variables.
C. In the large amount selected data which is randomly distributed for
character variables.
D. In the large amount selected data which is uniformly distributed for
character variables.
Thanks |
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w*********y
发帖数: 7895 | 49 大家编程的时候，怎么考虑EFFICIENT的问题？
比如说，只是觉的把程序写好，加些MACRO什么的简单程序呢，
还是说也要考虑机器里面的MEMROY使用，CPU TIME，PROGRAMMER TIME之类的。 |
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A*******s
发帖数: 3942 | 50 I wrote a tree macro which needs to split a dataset many times based on
different conditions, but it runs quite slowly. For a 700 rows dataset and
500 conditions, it takes 3~5 minutes to complete a loop... Is there any
general way to improve the efficiency? I can only come up two ways:
1. Create index on the variables in if conditional statement?
2. Multithread/parallel programming? I just read oloolo's blog about this
part, wish I could figure out how to do that.
Any other ideas? |
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