l**k
发帖数: 45 | 1 【 以下文字转载自 Computation 讨论区 】
发信人: lzck (Jenny), 信区: Computation
标 题: 急死了，word file 打不开.请问各位如何fix这个问题。在线等！谢谢！
发信站: BBS 未名空间站 (Wed Jul 1 11:52:43 2009, 美东)
昨晚改的paper，save到移动硬盘，可今天到lab，打开是一堆乱码，换了几个computer
都一样，请问各位如何fix这个问题。在线等！谢谢！ |
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g******8
发帖数: 15 | 3 There are counter-examples to this if we ask whether there is an interior
fixed point. some examples show the only fixed point is either 0 or 1. |
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l**k
发帖数: 45 | 4 【 以下文字转载自 Computation 讨论区 】
发信人: lzck (Jenny), 信区: Computation
标 题: 急死了，word file 打不开.请问各位如何fix这个问题。在线等！谢谢！
发信站: BBS 未名空间站 (Wed Jul 1 11:52:43 2009, 美东)
昨晚改的paper，save到移动硬盘，可今天到lab，打开是一堆乱码，换了几个computer
都一样，请问各位如何fix这个问题。在线等！谢谢！ |
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W******4
发帖数: 44 | 5 I am a PhD candidate in ME
Now my research project is focused on sheet metal bending.
In the definition of “Fixed-End Entity Bending” in API documents, the part
after bending can be divided into three portions:
Fixed Portion, Transformed Portion and Bent Portion. In my paper I want to
cite the three concepts but I cannot find them by Goolge or in journal
papers of scientific databases.
Can anyone tell me where the resource of the three concepts is?
Thank you very much! |
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J*J
发帖数: 201 | 6 ☆─────────────────────────────────────☆
toutuanzi (rr) 于 (Fri Aug 1 16:12:51 2008) 提到:
As this question in UW, which i did wrong, there is holosystolic murmur at
sternal boarder in VSD and fixed split of S2 in ASD. So why there is no
fixed split of S2 in VSD? Isn't the mechanism blood overload on the right
side of the heart? Thanks.
Fanfan
☆─────────────────────────────────────☆
yoghurt (我爱普洱茶) 于 (Fri Aug 1 16:33:55 2008) 提到:
Good question!
I never think about it.
I searched uptodate |
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s**a
发帖数: 178 | 7 Company: Top-Tier Global Investment Bank
Position: Fixed Income Quantitative Analyst
Location: Singapore
Level: Entry-level to Junior
Description:
Global head of Quantitative Research is looking for a couple of Quantitative
Analysts with strong background to join their Singapore Office. PhD from a
quantitative descipline is required (Physics, Math, Statistics, EE, CS).
Must have strong programming skills (but not necessarily CS background), able to develop small algorithms. Need to have Fixed In |
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i***0
发帖数: 55 | 9 Quantitative Analyst/Fixed Income
Please list my name in the email.(bbsmail to ask for my name)
Employer: Investment Bank
All jobs listed by Martingale International Search Inc.
Location: New York, NY, United States
Description:
The major Investment Bank in NYC is looking for quantitative analyst with
experiences in one area of fixed income and/or derivatives, preferably
credit market instruments. Right applicant is expected to be involved with
all aspects of quantitative methodologies in pricin |
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J**********y
发帖数: 1891 | 10 诚聘自动交易系统和FIX编程老师和顾问
小弟在工作之余，在初学FIX编程，目标是把自己的TRADING PLATFORM和BROKERAGE连起
来，总觉的学不会，学不快，还请专家指点。
报酬好说，
非常感谢。 |
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j******n
发帖数: 271 | 11
They just use slightly different sets of math theories. Fixed income
uses stochastic calculus a lot to price and risk mange derivatives.
Equity uses time series and prediction a lot to try to locate trading
opportunities.
income
Personally I feel quant is more technical, and mba is more business
and they are on quite different career tracks.
That is because a majority of fix income instruments are contracts
with a counter party subject to default. For that reason, the credit
worthiness of the c |
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s**a
发帖数: 178 | 12 不知道有没有PM在版上潜水，这个客户在香港也在找fixed income trader/PM:
Also looking for a seasoned fixed income trader in US rates to work on
both execution and alpha strategies. The group already has excellent
rates system in place, capable of identifying trade opportunities and
managing risks.
We are interested in speaking with candidates who have experience in
US rates relative value trading. The product coverage should be liquid
securities such as
US Treasuries, note, bond futures, TIPs, agencies, US swap, FRAs,
e |
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a**i
发帖数: 608 | 13 Get Ready For The Fixed Income Bloodbath
On Monday September 27, 2010, 3:40 pm
Fixed income desks are going to be subject to severe layoffs, according to a
highly placed Wall Street insider with information about the plans of his
firm and the plans of rivals.
"It's going to be a blood bath. Volume is down for everything except
Treasuries and Munis. These guys aren't making money and soon they'll be out
of their jobs," he said.
He is sitting in Grand Central's Oyster bar. It's an annual ritual fo |
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t*******8
发帖数: 67 | 14 if you are CS or EE major, algo trading. if you are math, physics, fixed
income.
fixed income needs more heavy modeling. Algo trading depends on execution
and signal process. |
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g********r
发帖数: 8017 | 15 我也是一知半解,欢迎拍砖:
比如说在板上随机挑出几个人来,到各大饭店品尝红烧肉.作为评价红烧肉好坏,Y就是各
人吃的量.X呢,我们感兴趣的是红烧肉的色泽,肥瘦比例之类的.
决定吃多少,还有个重要的参数就是各人的食量.比如版主大人,根据ID和雅号,那一定吃
的比较多.可是呢,这个不能当作一个fixed effect.尤其是观察量比较少的时候.操作上
来说,会吹大估计值的方差.哲学上说,我们不应该给板上好几百口子每人一个fixed
effect, 而应该把它当作从一个population里的抽样.所以就叫random effect了.
有的人,比如我老板,对random effect非常的不鸟,认为那是缩小方差的一个小手段. |
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d**********r
发帖数: 24123 | 16 同赞。个人的理解是 Fixed Effects 是俺选取的，而Rabdom 不是自己控制的。
比如天气。
如果你专门选择晴天和雨天来做，那么这个天气就是Fixed。
如果你不专门挑选晴雨，碰到什么就是什么，那么这个天气就是Random |
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p*7
发帖数: 45 | 17 我刚刚开始学这个也不懂。我的感觉是FIXED，two way anova with multpile
replicants in each cell. Because there are only three levels in each factors
and all the levels are included here, it is fixed effect model. If there
are a lot of levels and we randomly selecet three, it will be random effect.
I have another question. Even we randomly select three from a population,
with only three samples, how we are going to estimate variance of the random
effect?
and
designs |
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i**z
发帖数: 194 | 18 要看样本，fixed or random 是看如何实验设计的。
如果就这三个，那么是fixed的。
and
designs |
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p*7
发帖数: 45 | 19 我刚刚开始学这个也不懂。我的感觉是FIXED，two way anova with multpile
replicants in each cell. Because there are only three levels in each factors
and all the levels are included here, it is fixed effect model. If there
are a lot of levels and we randomly selecet three, it will be random effect.
I have another question. Even we randomly select three from a population,
with only three samples, how we are going to estimate variance of the random
effect?
and
designs |
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i**z
发帖数: 194 | 20 要看样本，fixed or random 是看如何实验设计的。
如果就这三个，那么是fixed的。
and
designs |
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k*******a
发帖数: 772 | 21 "SAS for mixed models"摘了几段话
An effect is called fixed if the levels in the
study represent all possible levels of the factor, or at least all levels
about which inference is to
be made.
Factor effects are random if they are used in the study to represent only a
sample (ideally, a
random sample) of a larger set of potential levels. The factor effects
corresponding to the larger
set of levels constitute a population with a probability distribution. The
last statement bears
repeating because it goe... 阅读全帖 |
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J*****n
发帖数: 4859 | 22 【 以下文字转载自 Economics 讨论区 】
发信人: Jadeson (Jadeson), 信区: Economics
标 题: fixed effect一问
发信站: BBS 未名空间站 (Thu Mar 7 23:03:40 2013, 美东)
最近在看一些panel regression的东西，一个很简单的东西始终没有弄明白
y_it = beta * x_it + v_i + error
书上说如果v_i和x correlation是0的话，那么这个model就是fixed effect model
但是这里v_i在时间上是一个常数，其variance是0，它和任何时间序列的correlation
都是undefined的。
我哪里理解错了？
谢谢 |
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F****3
发帖数: 1504 | 23 要用zero-truncated negative binomial regression分析panel data，想加几个fixed
effect。
请问SAS里面怎样实现啊？如果没有fixed effect我是用proc fmm。谢谢！ |
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F****r
发帖数: 151 | 25 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****t
发帖数: 19049 | 26 呵呵看来您不知道自己说反了。random effects之所以要用不同的设定是因为所用的
predictor表现特别;而不是因为不同的coefficient设定才把一个predictor变成了
random effect
比如说楼主决定用income作predictor,如果一个intercept,一个slope就可以算出不错
的prediction,那么fixed effect model就搞定。需要做random effect model最简单（
但不是最常见）的情况:不同income有不同的intercepts（假定slope还都一样）。比如
0-50k intercept 1000, 50k-100k intercept 1, 100k+ intercept 10。这样的
relationship不是linear,linear model可以做但predicition不好。而用smoother也许
能提高prediction但不make sense。这时用random effect model效果最好。
为深嘛这predictor这么特别。原因是income其实不是最合适的pr... 阅读全帖 |
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j********2
发帖数: 5 | 27 做了两年generalized linear mixed model的人飘过～～～
beta是parameter，不是任何factor/effect。
random effect指的是某个X。
natural grouping确实是核心概念之一，还有另外一点就是我们并不在乎random
effect的意义，我们并不interpret它。
fixed model跟random model实际上就是variance-covariance structure不同。
其实只要看formula就能明白的。fixed effect在formula里面不是随机的，而random
effect在formula里面是random的，服从某个分布的，通常这个分布是normal（0，
sigma）。 |
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s********a
发帖数: 154 | 28 在做一组数据的repeated analysis, 数据有missing value 用proc mi 生成10 sets
数据，然后proc mixed repeated analysis，接下来该怎样用proc mianalyze 得到
fixed effects 的p value？fixed effects 有categorical vars， 请牛人支招，谢谢
了 |
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A****e
发帖数: 16 | 29 Archery 店里的technician 告诉我射Expandable箭头不需要调sight, 我特地到靶场射
了一下fixed 和 expandable，感觉没有太大区别。大家帮我分析一下。
弓：PSE Stinger 3d
拉力： 65磅
箭头：100 grain
距离：30 码
Fixed:
Expandable: |
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f********r
发帖数: 56 | 30 In <=30 yards, there most likely is not much difference.
Either style will kill efficiently with good shot placement. There are pros
and cons to each:
Fixed:
Pros - rigid design tends to make them stronger and less apt to bend/break
on bone contact; less expensive; no "deployment" issues; blade replacement
is often easier; Occam's Razor
Cons - arrow flight will suffer if bow is out of tune; sometimes noisier in
flight; smaller wound channel (though this is subject to debate)
Mechanical:
Pros - f... 阅读全帖 |
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c*******r
发帖数: 1243 | 31 能用fixed，不用expandable。
听过太多expandable不能正常打开的故事了。所以我从来不用。fixed箭头，我推荐用
用一体的，穿透力更强。我用NAP Hellrazor，65lb，30码以内除非射到腿骨上，其他
部位都可以对穿。有次射到鹿头顶上，也射穿了。
另外，我也觉得楼主还需要多花些精力在射箭技术上。从你这两张图看，如果你是认真
射的，散布太大了。30码，不动窝，三箭应该挤在一起比较正常。 |
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o******s
发帖数: 1364 | 32 不是fixed或者mechanical的分布比较。
我还是喜欢fixed |
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s**e
发帖数: 395 | 33 我用fixed blade（弩）
fixed 还有一个好处，如果用猎帐，可以直接隔着mesh net射 |
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s******e
发帖数: 96 | 34 以前得时不时disable /enable incoming call来fix, 不知道现在有没有fix? 谢谢 |
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C****g
发帖数: 3945 | 35 【 以下文字转载自 ebiz 讨论区 】
发信人: CatEgg (张福来猫 ~>@@<` 其实生命原本如此), 信区: ebiz
标 题: jailbreakme update fix
发信站: BBS 未名空间站 (Mon Aug 2 03:09:45 2010, 美东)
发信人: fairprice (fairprice), 信区: FleaMarket
标 题: jailbreakme update fix
发信站: BBS 未名空间站 (Mon Aug 2 02:52:14 2010, 美东)
很多人遇到这个问题， 如果你用jailbreakme, 在一个彩屏停留， do following
setting--general--reset---reset network settings
从新load后，用wifi， disable 3g 从 jailbreakme.modmyi.com 进入即可。 |
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w*******y
发帖数: 60932 | 36 mwave has TP-LINK TL-WR841N Wireless N Router, Atheros, 2T2R, 2.4GHz, 802.
11n/g/b, Built-in 4-port Switch, with 2 fixed antennas:
http://www.mwave.com/mwave/SKUSearch_v3.asp?px=DS&scriteria=AA97481&pagetitle=TP-LINK TL-WR841N Wireless N Router, Atheros, 2T2R, 2.4GHz, 802.11n/g/b, Built-in 4-port Switch, with 2 fixed antennas
for $29 + FS for mclub members (Free to join)
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w*******y
发帖数: 60932 | 37 Link:
http://www.tanga.com/products/relax-i-can-fix-it-t-shirt
Relax, I Can Fix It! Truer words could not be spoken. You are the geeky guru
of calamitous solutions, the supreme wizard of technofix and you are here
for two things, to drink highly caffeinated beverages and to kick tech
problem booty, and you are almost out of Jolt.
Please note that XXL and XXXL sizes cost $.99 cents more per shirt!
|
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w*******y
发帖数: 60932 | 38 3-Year Fixed Rate Mortgages (Purchases and Re-Finances)
3.875% / 3.958 APR
"Differe nt terms and conditions may apply in Puerto Rico. 30-Year Fixed-
Rate Mortgage: A 1% origination fee is required. Loan example: $300,000 at 3
.875% (3.958% APR), 360 monthly payments of approximatel y $1,411 each (
principal and interest only). The application of discount points will be
determined by the loan-to-value (LTV) ratio combined with certain
representati ve credit scores. Points also apply to certain... 阅读全帖 |
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w*******y
发帖数: 60932 | 39 3-Year Fixed Rate Mortgages (Purchases and Re-Finances)
3.875% / 3.958 APR
Link:
https://www.penfed.org/productsAndRates/mortgages/mortgageCenter.asp
"Differe nt terms and conditions may apply in Puerto Rico. 30-Year Fixed-
Rate Mortgage: A 1% origination fee is required. Loan example: $300,000 at 3
.875% (3.958% APR), 360 monthly payments of approximatel y $1,411 each (
principal and interest only). The application of discount points will be
determined by the loan-to-value (LTV) ratio combine... 阅读全帖 |
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w*******y
发帖数: 60932 | 41 The Gun Source offers Glock 22 RTF Pistol, PT2250203, Black, S&W, 15Rd, DAO,
Polymer Full Size Frame, Fixed Sights, 4.49" Barrel.
Alternatively, Bud's Gun Shop offers it for $494 shipped + 3% cc fee.
Be sure to take in consideration as to what your local FFL fee is for
transfers.
Note: This product cannot be purchased if you live in one of the following
state(s): California ,Hawaii ,Massachusetts ,New York
LINKY:
http://www.thegunsource.com/item/86857_Glock_Handguns_Pistols_G
quote
Specification... 阅读全帖 |
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y**i
发帖数: 357 | 42 DO NOT use your own insurance to fix it (claim it as your fault). your
insurance will increase a lot.
It is worthy only if the damage costs >$5000 to fix. Because in the insurance record it will not show exactly how much is the damage, will only say damage is >$750. So $20000 damage and $800 damage doesn't show any difference in your record. |
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h******t
发帖数: 872 | 43 http://money.cnn.com/2010/02/17/autos/brake_override/index.htm
'Brake override:' The fix Toyota should have had
By Peter Valdes-Dapena, senior writerFebruary 17, 2010: 8:29 AM ET
NEW YORK (CNNMoney) -- There's one safety feature that Toyota could have
had in its cars for years that would have stopped many, perhaps even
most, cases of unintended acceleration -- it's called 'brake override.'
Toyota's has been saying for several weeks that it will add the feature
to all of its new cars, and singled |
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l**i
发帖数: 8144 | 44 The cost of fixing Fannie Mae and Freddie Mac, the mortgage companies that
last year bought or guaranteed three-quarters of all U.S. home loans, will
be at least $160 billion and could grow to as much as $1 trillion after the
biggest bailout in American history.
Fannie and Freddie, now 80 percent owned by U.S. taxpayers, already have
drawn $145 billion from an unlimited line of government credit granted to
ensure that home buyers can get loans while the private housing-finance
industry is moribu |
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i***a
发帖数: 4718 | 45 http://www.bloomberg.com/apps/news?pid=20601109&sid=an_hcY9YaJas&pos=10
By Lorraine Woellert and John Gittelsohn
June 14 (Bloomberg) -- The cost of fixing Fannie Mae and Freddie Mac, the
mortgage companies that last year bought or guaranteed three-quarters of all
U.S. home loans, will be at least $160 billion and could grow to as much as
$1 trillion after the biggest bailout in American history.
Fannie and Freddie, now 80 percent owned by U.S. taxpayers, already have
drawn $145 billion from an u |
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c*********e
发帖数: 16335 | 47 今天看到一大狗，公的，鸡巴都勃起了，蛋蛋和人的一样大。男主人不fix公狗。难怪
很多人喜欢狗。 |
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发帖数: 1 | 49 Facebook is building an AI tool to help devs fix buggy code
你们马工谣失业了 |
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n********g
发帖数: 6504 | 50 其实fix bug太弱了。JetBrains不已经做了很多。直接取代码工码扣也不难。来回就几
个数据结构算法。 |
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