d*******8
发帖数: 321 | 1 当换spark plug的时候，要同时还distribute cap吗？或者distribute cap要隔多长时
间换新的？谢谢 |
|
h*********n
发帖数: 915 | 2 从IRS网站上看，这样似乎是合理的。IRS只管你的contribution amount。增值显然不
能算，那缩水也不该算。但不知道recharacterized contributions是什么意思。
http://www.irs.gov/publications/p590/ch02.html#en_US_publink10006523
Aggregation (grouping and adding) rules. Determine the taxable amounts
distributed (withdrawn), distributions, and contributions by grouping and
adding them together as follows.
Add all distributions from all your Roth IRAs during the year together.
Add all regular contributions made for the year (including contributions
made |
|
m**********w
发帖数: 4161 | 3 看了这篇文章，又看到板上一些说法，搞不清楚到底怎么回事。有人研究过吗？
悬赏五个包子征求正确解答。
http://www.investopedia.com/articles/retirement/03/030403.asp
尤其这一段：
Distributions of Roth IRA assets from regular participant contributions and
from nontaxable conversions of Traditional IRA can be taken at anytime, tax
and penalty free - that is, if the distribution is in line with the rules
that exempt assets from income tax and early-distribution penalties.
先说任何时候都可以拿本金和non-deductible conversion的钱，但后面又跟了一个"if
"条件。 |
|
m**********w
发帖数: 4161 | 4 还有这段：
To determine the source of assets distributed from a Roth IRA, the IRS uses
the 'ordering rules'. According to the ordering rules, assets are
distributed from a Roth IRA in the following order (once assets from one
source run out, the assets from the next source are distributed):
1. regular Roth IRA participant contributions.
2. taxable Traditional IRA conversions.
3. nontaxable Traditional IRA conversions.
4. earnings on all Roth IRA assets.
这个taxable Traditional IRA conversio |
|
|
c*****n
发帖数: 1877 | 6 【 以下文字转载自 CS 讨论区 】
发信人: cariban (食人部落), 信区: CS
标 题: 请问distributed systems的master工作行情怎么样?
发信站: BBS 未名空间站 (Mon Jul 26 12:08:20 2010, 美东)
LP得到了一个master位置:
Distributed systems focuses on utilizing networks, from concurrent processes
inside a computer to world-wide cooperating systems using the Internet.
具体的必修课有:
1. Open distribuert prosessering
2. Protocols and routing in the Internet
3. Programming heterogeneous multi-core architectures
4. Performance in distributed systems
5. Advanced topics in D |
|
p*****l
发帖数: 8 | 7 确切地说，应该是post distribution day trading rule。
今天是个Major distribution day(defined by Cobra九号胡同)。
从去年10月以来，连上今天，一共16个distribution day，让我们来看看，第二天都发
生了什么。
首先打开网页
http://stockcharts.com/def/servlet/Favorites.CServlet?obj=ID2393449&cmd=show[s128363142]&disp=P
这是cobra的spx图。
然后打开stockcharts.com，看spy的图，因为spy包含了open gap的信息，且是真正
tradable的东西。
自己对比一下，一个个数过来，发现了什么？
1.第二天以跌的居多
2.无论涨跌，以spy previous close为中心，上0.2，下0.6的区域，总是被cover的。
这是一个16 out of 16的统计结果。如果有疑虑的话，大家可以backtest一下去年10月
以前的，看看准确率如何。
好了，any use?
用处大了去了。 |
|
c******y
发帖数: 8796 | 8 【 以下文字转载自 Investment 讨论区 】
发信人: chopsuey (后海大傻鱼), 信区: Investment
标 题: 收到1099R 说我 early distribution，怎么回事？
发信站: BBS 未名空间站 (Wed Apr 14 02:41:51 2010, 美东)
我前年开了一个roth ira，然后前年和去年各contribution 几千块
没有withdraw，为啥收到 1099R 说我有 300多刀的taxable distribution 而且被
withhold了60多刀
一年都没动这个account，哪来的distribution？谢谢 |
|
|
c******7
发帖数: 439 | 9 F1, NR
有mutual fund的distribution, 也有brokerage acct自己操作的realized loss.
我知道F1 loss不能抵税.
但总的从我distribution里面减掉这部分吧?
算我总共的财产性收入的盈利.
而且应该是只要是我名下的都算个总的,
即使是不同的broker分别报给IRS的也没有关系
求教, 谢谢!
另外从mutual fund那里面看来的只有distribution
capital gain是要到realized时候才算吗? |
|
Z***e
发帖数: 2983 | 10 我的理解：
Fed tax return:
It is pre-tax saving, so it is excluded from AGI for fed tax return.
If you have distribution (you will get form 1099-SA), as long as it is
qualified distribution (medical, drug blah blah), no need to pay tax
State tax return （California case)
The amount you have distributed is taxable under California tax law.
Not sure about other states. |
|
A****S
发帖数: 978 | 11 Mr. O distributed the spillover visa numbers by PD. It is illegal.
No law said the spillover should be distributed by PD.
I think the spillover should be distributed based on the number of pending
cases of each country.
I think China should get at least 1/3 of spillover.
Mr. O cheated people big time. |
|
l***n
发帖数: 4 | 12 Assume X is Uniformly distributed on [0,1]; Y is Uniformly
distributed on [-a,a] (0
then what is the p.d.f or distribution function of Z = X + Y?
Or what is Probability{X+Y
I tried to use convolution method, but in case of z>1-a & z>a,
it doesnt work.
Please help me.
Thanks |
|
S*********r
发帖数: 4729 | 13 【 以下文字转载自 EE 讨论区 】
发信人: SmartFarter (喷屁式直升飞猪), 信区: EE
标 题: 请教一个distribution之间的likelihood问题
发信站: BBS 未名空间站 (Tue Jun 28 22:30:35 2005)
我需要有一个公式衡量for a given distrition Q, the likelihood p(W|Q).
W is the observed distribution. W and Q could be approximated by histogram.
What is a good measurement for p(W|Q)?
我打算用KL divergence，D(W,Q)来定义，p(W|Q)=c*exp(-D(W,Q)). 对不对呢？
主要问题是我不知道如何保证，/integral_W' p(W'|Q)dW'=1.
这个问题应该很常见。就是当我的model不是一个值，而是一个distribution的时候，
如果建立正确的likelihood公式。大家有没有遇到过这个问题？请教一下。 |
|
M***7
发帖数: 2420 | 14 急。
请问SQL有相关function用来算cumulative distribution function of normal
distribution吗？
谢谢 |
|
s**********o
发帖数: 14359 | 15 你这个不行的，因为PUBLISHER老在变，DISTRIBUTION一旦离线就OUT OF SYNC了
就要重新SYNC，最好是DISTRIBUTION和SUBSCRIBER都去离线UPGRADE，
然后重新SYNC，SYNC好了再接APPLICATION,所以最好有个临时的SERVER用一用，
DISTRIBUTION一般跟PUBLISER在一个SERVER上，这样省去很多麻烦的 |
|
p*****3
发帖数: 488 | 16 组里做的系统也算是distributed system.
但下层框架都是封装了n层了，自己改进的任务不是没有就是轮不到新人。话说这里的
distributed system也就是web service, JMS call来call去，像RPC那种，部署就是在
实体机或AWS上。
有经验的朋友能不能请教一下该怎么下手去学相关内容，希望下份工作也是做
distributed system的internet backend，但是希望能更偏技术和infrastracture, 而
不是太多的纠缠上层business logic。如果以此为目标该怎么下手积累有价值的经验和
知识呢？ |
|
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c******e
发帖数: 18 | 18 To consider MLE of a distribution, in the form of density,
there should have a parameter, so I think maybe u forgot to
include it. Is the density like this:
f(x,a)=e^(-(x-a))/[1+e^(-(x-a))]^2, it's the logistic
distribution.
For this distribution, consider L(x,a), which is
L(x,a)=f(x1,a)*f(x2,a)*...*f(xn,a) and take log both sides,
l(x,a)=log[f(x1,a)]+log[f(x2,a)]+...+log[f(xn,a)]
E{derivative of log[f(X,a)]}=Integral{ [derivative of
f(x,a)/f(x,a)]*f(x,a)dx
=Integral{ |
|
w****h
发帖数: 212 | 19 请问normal distribution 和gaussain distribution 有什么区别？
现在忽然弄混了，似乎一样的 |
|
e**r
发帖数: 54 | 20 same definition?
请问normal distribution 和gaussain distribution 有什么区别？
现在忽然弄混了，似乎一样的 |
|
a**n
发帖数: 97 | 21 Same thing. PPL tend to say "normal distribution" and "The distribution is
Gaussian" |
|
j********g
发帖数: 49 | 22 【 以下文字转载自 Mathematics 讨论区 】
发信人: jinanddong (辐射), 信区: Mathematics
标 题: 知道random process (X+Y) 和 X 的distribution, 如何得到 Y?
发信站: BBS 未名空间站 (Sun Nov 16 00:46:53 2008)
现在我有两组实验数据, 可以分别画出两组数据的cummulative distribution
function (CDF). 假设一组是X, 另一组是X+Y, X 是不要的那部分, 请问如何得到y
的distribution?
Y最终是要用于simulation的, 所以不一定要精确的distibution, 只要知道每个P(Y=y)
, 就可以了. |
|
l**********n
发帖数: 303 | 23 Hi all,
Is there anyone familiar with Matpower?
I successfully handled the power flow on transmission systems (like case14.m
) using matpower. Now I need to run power flow on a distribution grid with
some DGs and microgrids and came up with some problems.
I found a IEEE distribution test system from http://www.ewh.ieee.org/soc/pes/dsacom/testfeeders/index.html. But I don't know for sure the data provided by this website, and how it can be converted to the matpower data format like in the case14... 阅读全帖 |
|
s****o
发帖数: 18 | 24 【 以下文字转载自 EE 讨论区 】
发信人: swzhao (Joshua), 信区: EE
标 题: 问个问题：harmonic distribution
发信站: BBS 未名空间站 (Tue May 23 00:09:32 2006)
看到一片文献提到：by sampling a sinusoidal signal with uniform provability
over a period, the samples have an harmonic distribution. And the harmonic
distribution is given by
p(x) = 1/(pi*sqrt(2*\sigma^2-x^2)), for |x|
the variance of RV x.
There is no reference for this claim. And I cannot find a good reference by
google. Is this a straight or famou |
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n***l
发帖数: 9 | 25 Pareto Distribution has the form
P = 1 - (b/x)^a.
with mean
E = ab/(a - 1).
Let b = 1, and E = 128, then we can derive a = 128/127.
So P = 1 - (1/x)^(128/127).
I wanted to generate 10^7 numbers that follow the distribution
and so use MatLab to generate it. As with other distributions,
here P = rand(10^7, 1), and we can use the inverse function or
even the exp-log expression to do it. But to my surprise, the
average number of the obtained 10^7 numbers is just around 20,
far from the expected 128. |
|
m******t
发帖数: 273 | 26 【 以下文字转载自 Statistics 讨论区 】
发信人: myregmit (myregmit), 信区: Statistics
标 题: long time generating gamma distribution in python
发信站: BBS 未名空间站 (Thu Mar 13 19:04:24 2014, 美东)
I need to generate a truncated gamma distribution pdf curve and histogram in
python 3.
2 on win7.
import numpy as np
import matplotlib.pyplot as plt
import scipy.special as sps
shape, scale = 2., 2. # mean and dispersion
counter =0
s = []
upper_bound = 4
lower_bound = 0.5
while (counter <= 1000):
t = np.random.gamma(shape, ... 阅读全帖 |
|
r*****t
发帖数: 286 | 27 ☆─────────────────────────────────────☆
quantaphobia (quantaphobia) 于 (Fri Mar 23 11:43:58 2007) 提到:
i try to use copula model to simulate the VaR and expected shortfall. the
model is good fit for unconditional coverage, but somehow fails in
independence test. the breaches show clustering charateristic. i guess
problem is on marginal distribution. since it is a static distribution and
doesn't consider the volatility clustering in distribution, so the model
fails in catch the latest market i |
|
l*********s
发帖数: 5409 | 28 t is not a extreme value distribution, but rather a heavier tailed
distribution ,compared to Normal. |
|
m******t
发帖数: 273 | 29 【 以下文字转载自 Statistics 讨论区 】
发信人: myregmit (myregmit), 信区: Statistics
标 题: long time generating gamma distribution in python
发信站: BBS 未名空间站 (Thu Mar 13 19:04:24 2014, 美东)
I need to generate a truncated gamma distribution pdf curve and histogram in
python 3.
2 on win7.
import numpy as np
import matplotlib.pyplot as plt
import scipy.special as sps
shape, scale = 2., 2. # mean and dispersion
counter =0
s = []
upper_bound = 4
lower_bound = 0.5
while (counter <= 1000):
t = np.random.gamma(shape, ... 阅读全帖 |
|
a****t
发帖数: 720 | 30 i only know little about statistics.
we have a conjecture in number theory(some kind of property follow some distribution) hard to prove,
then i did a computer experiment to test it. and got lot of data (around 10^4).
from the graph(normalized data), there are several distributions(include our target
distribution) fit that graph pretty good. so how can i analysis those data, to say our
target one is the true one? thanks |
|
p*****y
发帖数: 3 | 31 I think u can do this way to roughly see the shape of distribution of t1-t2.
(1) simulate 10000 data from two t-distribution with the same mean and
variance respectively.(using R software)
(2) then do the substraction with respect to each generated random variables
. then the 10000 difference follow t1-t2 distribution.
(3) then u plot the curve using R to check its shape roughly.
in terms of theoretical proof, I still do not know how to handle this, sorry
for that. |
|
j********g
发帖数: 49 | 32 【 以下文字转载自 Mathematics 讨论区 】
发信人: jinanddong (辐射), 信区: Mathematics
标 题: 知道random process (X+Y) 和 X 的distribution, 如何得到 Y?
发信站: BBS 未名空间站 (Sun Nov 16 00:46:53 2008)
现在我有两组实验数据, 可以分别画出两组数据的cummulative distribution
function (CDF). 假设一组是X, 另一组是X+Y, X 是不要的那部分, 请问如何得到y
的distribution?
Y最终是要用于simulation的, 所以不一定要精确的distibution, 只要知道每个P(Y=y)
, 就可以了. |
|
t****g
发帖数: 715 | 33 Hi,
Does anyone here know how to conduct a Kolmogorov-Smirnov test for a
discrete distribution in any software package?
Here is my problem: I have a vector of data, and I want to test whether it
follows a binomial distribution. In addition, I need to do it using the K-S
test.
As far as I know, K-S test works well for continuous distributions, but does
not do a good job for discrete ones. I tried R (ks.test) and Matlab (kstest
), and got spurious results. It seems in R, "ks.boot" works for the di |
|
d*******1
发帖数: 293 | 34 做一个monte carlo 模型, 遇到一个问题, 有两个变量, correlated, 如果都是noraml
distribution, 还好处理, 关键是要是一个是normal, 一个是cauchy distribution 或
者beta distribution的话, 该如何 sampling, 不知道各位有没有好的办法 |
|
t**i
发帖数: 688 | 35 Tweedie distributions belong to the exponential dispersion model family of
distributions, a generalization of the exponential family, which are the
response distributions for generalized linear models. |
|
m****r
发帖数: 237 | 36 这个问题不是很明确。。不过看你的意思应该是在test if the data follows a poiss
on distribution or not.
Chisq-test can be used to test whether a random variable is from some specif
ied distribution, for instance, poisson in your case.
Your p-value here is between 0.5 and 0.9, you can't reject your null hypothe
sis, which is the data follows poisson distribution. That's how you get your
result.
There is a theorem behind this. You can google for chi-square test for it. O
ne of the application of Chi-square test |
|
f***a
发帖数: 329 | 37 补充点，对于某些distributions有很多hypothesis testing的方法可以检测数据是不
是符合，譬如最常见的就是normality tests： Shapiro–Wilk test啊，pearson's啊
，等等。你的candidate distribution是些常见的distribution的话，先去google有没
有现成的这些test，不行的话再可以用我上面提到的方法。 |
|
s*******y
发帖数: 2977 | 38 Can we test if a count data set follows negative-binomial distribution in
SAS? It seems we can check the over-dispersion of count data using deviance/
df, but this is for Poisson distribution only.
Any methods for negative-binomial distribution?
Thanks a lot in advance! |
|
A*******s
发帖数: 3942 | 39 different...
zero truncated means zero value is not valid in your assumption.
zero inflation means you have more zero values than theoretical models
people use ZT distribution plus delta distribution at zero to build a
mixture model, while zero inflated models contain count distribution (Poi/NB
) and delta.
similar |
|
a*****t
发帖数: 28 | 40 How to generate the sample points of uniform distribution in two dimensional
case,
if I use
seed=123;
n=100;
dim=2;
x=uniform(repeat(seed,n,dim));
I only can get the matrix with two column, which each column is uniform
distributed, but it is not guarantee that the combination of the point is
uniformly distributed in the 2-D. |
|
h***i
发帖数: 3844 | 41 。。。。。。
A random vector X = (X1, …, Xk)′ is said to have the multivariate normal
distribution if it satisfies the following equivalent conditions
[1]:
* Every linear combination of its components Y = a1X1 + … + akXk is
normally distributed. That is, for any constant vector a ∈ Rk, the random
variable Y = a′X has a univariate normal distribution. |
|
f*********8
发帖数: 165 | 42 sample1 sample2 sample3....sample100
var1
var2
var3
.
.
.
var1000
我想quantile normalize 这100个sample,得到一个reference distribution。 以后有
新的sample，就用这个reference distribution做quantile normalization。
请问版上牛人，这个reference distribution怎末整出来，能给个R code 的例子吗？
多谢。 |
|
z*******4
发帖数: 8 | 43 我想做一个distribution fit，发现proc univariate里面的distribution fit都是比
较常规的分布。我想用Dagum distribution fit，不知道有没有办法解决。
谢谢各位。
祝好。 |
|
M*******r
发帖数: 165 | 44 就是最普通的probability distribution, 比如normal, 客户要求用CV检验这个
distribution的estimation是否valid，请高手指点下，这样做合理吗？我认为CV更多
是用来检验prediction model, distribution的test更多是用hypothesis test来着，
比如chi square test。 |
|
m******t
发帖数: 273 | 45 I need to estimate a truncated gamma distribution paramters (shape , scale).
But, I only know the data mean and std. dev. I do not know the dat set.
Given the mean and std. dev. of a data set from a trucnated gamma
distribution, how to find shape and scale of the distribution parameters ?
I know MLE may be sueful for solving this problem. But, they depend on
knowing the whole data set.
Any help would be appreciated. |
|
w******a
发帖数: 986 | 46 exponential distribution乘个constant系数是什么distribution? thanks. |
|
s*********8
发帖数: 901 | 47 An Illinois lawyer who pleaded guilty to having sex with a man for $100 is
suing her former defense attorney and two other lawyers for allegedly
distributing naked photos of her.
Reema Bajaj, 27, says her former lawyer Timothy Johnson, former prosecutor
Calvin Campbell, and a lawyer listed in her complaint only as "John Doe"
gave confidential photos to the public along with unflattering news articles
about her.
Now potential clients, jurors, and judges have all seen these embarrassing
files, Baj... 阅读全帖 |
|
b0
发帖数: 421 | 48 uniform distribution 也是存在差异。
没有差异的是Dirac Distribution。 |
|
B*V
发帖数: 3365 | 49 An Illinois lawyer who pleaded guilty to having sex with a man for $100 is
suing her former defense attorney and two other lawyers for allegedly
distributing naked photos of her.
Reema Bajaj, 27, says her former lawyer Timothy Johnson, former prosecutor
Calvin Campbell, and a lawyer listed in her complaint only as "John Doe"
gave confidential photos to the public along with unflattering news articles
about her.
Now potential clients, jurors, and judges have all seen these embarrassing
files, Baj... 阅读全帖 |
|
c*v
发帖数: 93 | 50 No penalty or tax on your own Roth contribution. If you read through the
example in your link, you can see that. I think the sentence has an edit
error, it should not have that "if", i.e., it should read:
"that is, the distribution is in line with the rules that exempt assets from
income tax and early-distribution penalties."
waiting for baozi...
and
tax
if |
|
