C****t 发帖数: 53 | 1 一个hashtable就好, key为元素,value为两个数【重复次数,visited的状态】
def total(nums, tar):
maps = {}
res = 0
for ele in nums:
if ele not in maps:
maps[ele] = [1,0]
else:
maps[ele][0] += 1
for ele in nums:
if maps[ele][1] = 1: continue
diff = tar - ele
if diff not in maps: continue
rep1, rep2 = maps[ele][0], maps[diff][0]
if ele == diff and rep1 > 1:
res += rep1*(rep1-1)//2
elif ele != diff:
... 阅读全帖 |
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s******5 发帖数: 513 | 2 最近才刚刚开始用linux,没有什么c++背景,遇到一些小问题~
我下载了一个linux下的软件,我自己可以执行~比如,
./software --file input.txt --out output.out
但是我现在要多次重复地使用这个软件,比如,我有100个replication,分别命名为
rep1.txt,rep2.txt,。。。,rep100.txt,
我需要对这100个file都执行这个软件,并且输出100个输出文件,
rep1.out,rep2.out,....,rep100.out
非常困惑怎么解决这个问题~~有没有什么命令,或者程序模板可以用,应该是不需要
我自己手动操作的吧~~~~~~~~~~ |
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b*********3 发帖数: 1709 | 6 Black and the White 2 1⁄2- to 6-year-old children in the U.S.
standardization
sample of the Differential Aptitude Scale have a 1 standard deviation mean
difference (Lynn, 1996). The size of the average Black–White difference
does not
change significantly over the developmental period from 3 years of age and
beyond (see Jensen, 1974, 1998b)." (Rushton & Jensen, 2005, pp. 240-241.)
Farkas & Beron (2004) reported that blacks score 17.2 points below whites on
the
PPVT in this dataset at age 36... 阅读全帖 |
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g***m 发帖数: 2999 | 9 订了4月30号转ATT DSL PRO,今天5月4号了,啥动静也没,进帐户一查,还在BEING
PROCESSED,设备根本没寄出。
打电话去问:
REP1:4月30号线路已经开通,什么?设备没收到,那太糟糕了。我查查……哦,你这
个ORDER杯具了,我给你转INTERNET SALES。
REP2:你要订DSL啊?太好了,你的地址符合U-VERSE(网上查明明不符合),我们现在
促销BLAHBLAHBLAH。你不要电视啊,太可惜了。那我帮你订DSL吧,你是要6M还是3M还
是……什么,你已经订了?我查查……我看不见,你没订!你真订了?那我帮你转
INTERNET部门。
REP3:(西语大妈,口音很重)你没订!我这里什么也看不到。那就是你订了一半没完
成。你说你完成也没用啊,我这里没显示有你的订单。那你等等,我帮你转MANAGER。
MANAGER:我查查,哦,好像订单出了问题,没有成功。我现在帮你重新订一下,设备7
号寄到,线路从7号开始收费。你要从10号开始?行,订好了。还有什么能帮你的?
为啥MANAGER一下就能查到,REP就说啥也看不见呢? |
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y****e 发帖数: 23939 | 12 呵呵,谢谢。我真土啊!
doi=10.1.1.108.4263&rep=rep1&type=pdf |
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t**s 发帖数: 284 | 14 你的看法很有意思。我不懂数学,在生物钟这一块摸爬滚打了一些年头,想结合生物钟
这个例子看看数学建模和Benchwork的分歧。
这个是1999年Dunlap的review:
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.36.4931&rep=rep1&type=pdf
生物钟有一个比较有意思的“温度补偿”(temperature compensation)现象,在允许的
生理温度范围内,生物钟周期基本保持在24hrs左右,Q10~=1. 当时有许多人对相对研
究得相对比较透彻的果蝇生物钟进行数学建模。当时很有意思的现象就是数学建模的和
benchwork的互相看不起。建模的觉得生物学家只知道埋头benchwork,不懂generalize
。生物学家觉得那些模型"doesn't mean anything"。事实情况是,数学建模的结果没
有一个能够对未知的进行预测,这些建模的人只能跟着实验结果不停修改模型。
现在Cyanobacteria的生物钟振荡包括温度补偿已经可以在试管内重现了:
http://www.scie |
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l**********1 发帖数: 5204 | 15 Lastly conti:
above floor 3x3 matrix its
figure cited from
one 2002 Book
Bayesian probability
by Bruyninckx H. at KU Leuven, Belgium
HTTP: //citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.120.4949&rep=rep1&
type=pdf |
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e****p 发帖数: 354 | 16 记得有人问过但找不到帖子了,
三次重复试验,每次QPCR有三个TECH REP
Rep1
GOI-Houskeep
delta Ct: Con -2.9; Treatment: 2.1
Rep2
GOI-Houskeep
delta Ct: Con -1.9; Treatment: 2.0
Rep3
GOI-Houskeep
detla Ct: Con -2.1; Treatment: 3.0
请问如何综合三次结果用DELTA DELTA CT的方法算出 fold change +- 标准误啊,而且
把CON的平均值算成1
请高人指点 |
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s*******y 发帖数: 4173 | 17 I always use rep1, rep2, ....repn.... |
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l*********s 发帖数: 5409 | 18 netflix price 原始的贝叶斯随机矩阵分解解法:
http://citeseerx.ist.psu.edu/viewdoc/download?
doi=10.1.1.127.6198&rep=rep1&type=pdf
我的问题是
1)如果没有适当的限制,因子分析的解不是唯一。 这个对MCMC有什么影响?比如,多模态? 边际分布
弥散?
2)要进行多维的预测,怎么做呢?后验密度函数给出预测分布的均值?模? 如果是模,怎么求经验多元
分布的模? |
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l*********s 发帖数: 5409 | 19 all right>
Below is the reference paper of the original Bayesian probability matrix
factorization method for the Netflix price data set(
http://citeseerx.ist.psu.edu/viewdoc/download?
doi=10.1.1.127.6198&rep=rep1&type=pdf )
Essentially, this is a Bayesian flavored factor analysis, with user
preference matrix as the factor, and latent movie feature matrix as the
factor loading.
My question are two fold:
1) Since the factorization is not unique due to rotation invariance, I
wonder what will be the... 阅读全帖 |
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s**********8 发帖数: 25265 | 20 http://en.wikipedia.org/wiki/Electronic_signature
Electronic signature
From Wikipedia, the free encyclopedia
may contain original research. Please improve it by verifying the claims
made and adding references. Statements consisting only of original research
may be removed. More details may be available on the talk page. (August 2008
)
The examples and perspective in this article may not represent a worldwide
view of the subject. Please improve this article and discuss the issue on
the talk page.... 阅读全帖 |
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