m******r
发帖数: 1904 | 1 ☆─────────────────────────────────────☆
D216 (Dany) 于 (Wed Jun 20 18:10:37 2012, 美东) 提到:
今天女儿kindergarten graduation，鼓足勇气打开成绩单。wow，PASS with all high
performance!
我二月中旬因考虑到CS要换题型，临时决定先考CS。总共准备不足一月半。本人临床没
有any common sense, CK根本没有准备过，夫妻全职俩孩自己照顾，提枪上阵心里七上
八下，当时就想找捷径走，不想再琢磨新题型。于是在网上搜了些考经，觉得在前人的
经验上再接再励，应有希望PASS。
码字太慢，简要如下：
book: FA CS *****, uw *** (only used a few times while practice with sb
online)
Skype practice is very useful but not enough.
Workshop and tutor: goldusmlereview.com live st... 阅读全帖 |
|
l******0
发帖数: 1362 | 2 我门医院new grad的起薪是48.6/hr,由于工会作用，一年涨2次，平均每次4%。加上
shift dif和节假日150%pay,你自己算吧
关于你所谓的自卑和素质不高等等的毛病，可能跟你交往的人群有关。
我们新移民对美国认识的不够，有时候会使判断有误很常见。我以前就不知道原来清洁
人员的工资养一家人也没问题，想当个扫地的可不那么容易，挤破头，起薪26刀一小时
呢，你想的到吗？人啊，一叶障目的想当然不好 |
|
h*y
发帖数: 1289 | 3 There is nothing wrong with discounting. But you have to distinguish two dif
ferent concepts, price and value.
Future PRICE is the strike if you enter a forward contract today. This price
is determined today.
Forward VALUE is the present value of your expected terminal CF. |
|
j*******d
发帖数: 142 | 4 I think it is danguous to compare the journals by just using the impact fact
ors. The reputation of a journal is very stable, while the IF varies from ti
me to time. Especially, you cannot compare the importance of journals in dif
ferent field by their IFs.
Also, you cannot use the IF to compare journals with different types of pape
rs, i.e., reviews, long papers or letters.
In my view, the rank of journals in the field of Condensed Matter Physics ca
n be the follows:
Except Nature and Science: |
|
w****o
发帖数: 20 | 5 I don't know how your numerical simulation was obtained.
But here is the analysis based on this parallel resistance model.
This type of question is very sensitive to the boundary condition.
When you say "heat source on top" (z=z0 plane) and "heat sink at bottom" (z=0), I understand
you mean that, T(t, z=z0)==T_high and T(t, z=0)==T_low, ie., it's a fixed
function value problem at z ending planes (not a fixed differentiation problem: dT/dz=C @ z=z0, otherwise
the problem should be stated in a dif |
|
h***x
发帖数: 586 | 6 - It is very nice discussing with you here
What you said is correct, but you still think this question in the frame
work of a "statistical project". What you said is a standard logistic
regression project.
- My job is project oriented. I solve problems for the clients, so I am
always in "statistical project" frame, especially in a "standard logistic
regression project" frame if the target has only two response. :-)
Think about this way:
You manager comes to you office and ask you "huxxx, how dif |
|
D******n
发帖数: 2836 | 7 they only have one position(just kidding) : financial software developer.
they hire both cs and non-cs background ppl, and questions asked will be dif
ferent. U just need to show u r smart enough and have interests and potentia
ls in programming. |
|
B******5
发帖数: 4676 | 8 sound interesting
dif
potentia |
|
l*****i
发帖数: 43 | 9 什么sas code可以得到difference 呢？
不同的ID有不同的date，我想得到所有的x1在不同date和第一天的difference。
如下：
id date x1 difference
1 1 1 0
1 2 2 1
1 3 3 2
2 1 1 0
2 2 2 1
2 3 3 2
2 4 4 3
我知道有lag,dif functions，可以不是很简单得到difference这个variable。
谢谢 |
|
d*******o
发帖数: 493 | 10 这个题本猫当年面试的时候被考无数遍了，就是考dif()function.
BTW, 楼主的最后方法好像不work。 |
|
a********i
发帖数: 205 | 11 这个题本猫当年面试的时候被考无数遍了，就是考dif()function.
BTW, 楼主的最后方法好像不work。 |
|
P****D
发帖数: 11146 | 12 往回一个或多个都容易，往前比较麻烦。DIF也是只管往回…… |
|
h******e
发帖数: 1791 | 13 lag或dif function行不行？没细想。 |
|
D******n
发帖数: 2836 | 14 create a .vim directory under you home directory(there is a dot before
vim)
and then create a syntax directory under it
and then create a sas.vim file under the syntax directory
==============sas.vim======================
if version < 600
syntax clear
elseif exists("b:current_syntax")
finish
endif
syn case ignore
syn region sasString start=+"+ skip=+\\|\"+ end=+"+
syn region sasString start=+'+ skip=+\\|\"+ end=+'+
" Want region from 'cards;' to ';' to be captured (Bob Heckel)
sy... 阅读全帖 |
|
d******9
发帖数: 404 | 15 Data B;
Retain C 0;
Set A;
A2=A1-C;
C=A1;
run;
or:
DataB;
Set A;
If _N_=1 then A2=A1;
Else A2= DIF(A1);
Run; |
|
|
|
k*****u
发帖数: 1688 | 18 我给了一个笨办法。
data pre;
input id measure1 measure2 measure3;
cards;
1 20 30 40
2 50 60 70
;
data post;
input id measure1 measure2 measure3 ;
cards;
1 15 20 10
2 20 40 45
;
run;
%macro selectdif(maxindex);
%do i=1 %to &maxindex;
pre.measure&i-post.measure&i as dif&i
%if &i ne &maxindex %then ,
;
%end;
%mend;
proc sql;
select pre.id, %selectdif(maxindex=3)
from pre, post
... 阅读全帖 |
|
g****8
发帖数: 2828 | 19 用retain?
刚刚查到的，有个sas function dif() |
|
g****8
发帖数: 2828 | 20 楼主，莫搞这么复杂，用现成的 就一个dif()函数解决了。咱们写这么多SAS会哭的。 |
|
g****8
发帖数: 2828 | 21 data sample;
input TIME time8.;
cards;
11:30:01
11:40:01
11:51:01
11:52:01
12:20:01
13:32:01
13:35:01
14:50:02
14:52:02
15:12:01
;
run;
data sample;
set sample;
retain gr 1;
if dif(time) >600 then gr=_N_;
format time time8.;
run; |
|
p***7
发帖数: 535 | 22 cat typeI typeII total dif
1 Maximum 84.0 84.0 84.0 0.25
2 Mean 70.8 65.0 67.9 .
3 Median 69.0 65.0 66.5 .
4 Minimum 60.0 41.0 41.0 .
5 N 9.0 9.0 18.0 .
6 Std Dev 8.6 11.8 10.4 .
Because the merge-by was used, the variable cat is the order above.
How can you make it back the default order of proc mean? That is N, Mean,
Median,Std Dev, Maximum, Minimum?
In other words how do you control the order of the observ... 阅读全帖 |
|
l*********l
发帖数: 2371 | 23 %do i=0 %to &dif;
this is where macro variable I is defined. and it starts with 0. |
|
n*****3
发帖数: 1584 | 24 data step 处理 row by row 是对的， 但 sas 不 是． 你fit model， model是
对 column／variables 处理 ， 还是 fit model row by row？
exactly because sas is NOT row based , so you will see how awkward it is to
handle
within column observations, 什么 first,last,dif， lag... 这些 和 后来 引入
的 IML
一样， 是对一开始 BAD LANGUAGE DESIGN 的 修修补补．
如果你学过一点c++， 你就会发现 ， SAS data step 中 则些 based on ＰＤＶ 的
小trick 像极了c++ 中的 dirty trick， 都是 一些 无奈之举。 make up for bad
bad design in
the very beginning. |
|
m***o
发帖数: 995 | 25 投票帖401～500帖统计结果
1号：
nyt
http://mitbbs.com/article_t/board/31172376.html
zoun (煞逼浪私通)
flyfirefox (Fox)
dendrites06 ( 甚好，甚强巨！)
iKing (狮子座的螃蟹)
wormcc (虫虫)
chick (Por Los Momentos Dif Ciles)
classicfree (free)
darlene (晴雨表)
FATBIO (肥伯)
sleety (sleety)
OOXX (圈圈叉叉~无界妖瞳)
nycyorker (yorker)
honde (haha)
thunderugnr (opteron)
jacket (乐园)
shulai (Let me be)
====================
sirius66 (大刀向鬼子们的头上砍去)
pastoris (锦涛喇嘛)
wodemj (wodemj)
weijiashan (maoershi)
SkipToMyLou (我是街霸我怕谁)
Landau (heaven)
ldxk (猪都不怕我)
r |
|
f*********1
发帖数: 189 | 26 Icetea, you are right, and I was shocked when I saw it:)
Here is what I found after googling:)
"A
lthough the spleen is the most vascular organ in the
body, it is an infrequent site of tumor metastases.
1
Explanations proposed for the relative paucity of splenic
metastases have included (1) the sharp angle made by the
splenic artery, which makes it difficult for tumor emboli
to enter the spleen; (2) the rhythmic contractile nature of
the spleen, which squeezes out the tumor embolus and
pre... 阅读全帖 |
|
b**********g
发帖数: 534 | 27 hoho,听着挺热闹的,不过偶最近事情多,
gc的strut还没换,e46 要换tensioenr,ps reservior, mtf, dif fluid,fuel filter等
等,
league里面还要练球,游泳就算了.
其实主要是偶大瞎眼,进去了啥都瞅不见,sigh. |
|
b**********g
发帖数: 534 | 28 I plan to replace my trailing arm bushing and dif bushings,
the tools needed for the job cost about 300, hoho.
w/o those special tool to press out/in the bushing from the housing,
the job becomes a RPITA |
|
b**********g
发帖数: 534 | 29 也看啥mod,
honda原厂的hardtop会贬值?
HR的coilover会贬值?
Kaaz的rear dif会贬值?
Supercharger会贬值?
一般顶多也就是说花在mod上的钱别指望能卖出来, 贬值说还是第一次听说.
喜不喜欢bone stock也是各花入各眼,
你可能根本就不知道要把一个mod成这样的车tune到跑的好要花多少labor.
大部分人, 包括我, 不会买这个车的关键在于将来根本不知道怎么维护,
坏了东西怎么修, 而不是说这个价钱值不值. |
|
a*********g
发帖数: 2853 | 30 6 speed is actually worse... 1:1 for 4th in 5 sp and 5th in 6sp, and the dif
ference between gears is smaller for 6sp |
|
b***i
发帖数: 10018 | 31 It also depends on the final drives and tire sizes.
According to this page, for 2002 miata with 16" tires at 60mph,
5spd is at 3090RPM, 6spd is at 2940RPM.
http://www.idsfa.net/miata/gearing.html
dif |
|
l**u
发帖数: 731 | 32 俺的96 5M ，高速70基本就3750了，然后感觉收音机不响了，下了高速，感觉收音机又
回来了。跑在高速上说话基本靠吼了。
dif |
|
g*n
发帖数: 1148 | 33 http://4wheeldrive.about.com/od/offroadatvbasics/ss/4wd-2wd-dif
4 x 4 (4WD) - Is a vehicle that has four-wheel drive (4WD). "4x4" in a 4WD
vehicle means there are 4 wheels total and 4 wheels that are driven.
4 x 2 (2WD) - Describes to a vehicle that has two-wheel drive (2WD) with
four wheels. "4x2" in a 2WD vehicle means there are 4 wheels total and 2
wheels that are driven. The driven wheels can be either back or front wheels
but are usually the back wheels.
http://www.rubicon-trail.com/4WD101/... 阅读全帖 |
|
c***x
发帖数: 628 | 34 g37的lsd是用油的，基本没什么效果。开没多久就变open dif.. |
|
B*Z
发帖数: 7062 | 35 你们说的行星齿轮中差，锥齿轮中差长得什么样子呢，有没有图给看看？普通open dif
ferential里面也有锥齿轮，不是一种吧？ |
|
c*********r
发帖数: 19468 | 36 锥齿轮的就是一般驱动轴用的那种，没什么不同
行星齿轮的种类就比较多了，但一般的就是一个行星齿轮组
dif |
|
q*********u
发帖数: 9501 | 37 EIA Natural Gas Storage Data
Total (08/21/09): 3,258 Bcf
Total (08/14/09): 3,204 Bcf
Change: 54 Bcf
Year ago stocks: 2,742 Bcf
% diff to yr ago: 18.8 %
5-year avg stocks: 2,758
% dif to 5-yr avg: 18.1 % |
|
h*******y
发帖数: 1563 | 38 来自主题: _Stockcafeteria版 - 俺也来数个浪 野鸡DJI数浪，向牛人们学习，哈哈
1.看周线图，是2009年3月以来的大5浪上升第5浪。到顶了没有？目前还不好说，从K线
上来看，本周的周线是一个长下影的十字星或者小阳/阴线是肯定的了，在高位这是一
个顶部的特征，如果看作是是从去年10月3日以来的小3浪上升的话，那就是下降的第一
浪，也代表了2009年以来大5浪的终结， 如果看作是是从去年10月3日以来的小5浪上升
的话，可以看作第4浪，那就是一个底部特征，还有上升空间，甚至挑战07年的高点；
从macd上来看，是首次下穿，可上可下；
2.看日线图，从3月13日到4月5日做了一个双顶，前天回测3月6日低点，昨天和今天的
反弹是一个回测颈线的动作，可以看作是调整浪的b浪，破了3月6日地点的话就是c浪下
行，可能到1月份的底部，也可能到去年12月的颈线。如果不破，那就可能是在这几十
点的范围内震荡等待方向；从macd上来看，从3月16日死叉，4月5日回测dif以来，就是
在0轴下方弱势运行，rsi顶背离。后市继续下探的可能性很高。
从宏观上来看，关键看世界经济的配合和政策和MM的打算:) QE3,欧猪，FACEBOOK ipo
，传统的... 阅读全帖 |
|
s**********n
发帖数: 868 | 39 TSL has been holding the record of the lowest (non-silicon) processing cost
in the whole crystalline silicon PV industry consistently for a couple of
quarters and therefore maintained the best margin
Their management has the best track record of execution in capacity planning
and cost management among all Chinese peers in the 08-09 crisis. They have
a clear cost-reduction roadmap which seems sound to me. They also have
arguably the most diversified end market.
Both STP and FSLR have somewhat dif |
|
j****m
发帖数: 3137 | 40 en, lele tried on over 20 dif shorts in Target and found best fit |
|
s******o
发帖数: 298 | 41 Part III: Amateur Astronomy Conference
While in Tehran, Mike Simmons conducts a workshop at one of the largest
amateur astronomy conferences in the Middle East.
by Mike Simmons
The amateur astronomy workshop was far busier than I had anticipated. Roughly
150 amateur astronomers attended despite only six weeks notice. Most were
university and secondary students, many others were teachers, but almost all
were young compared with amateur workshops in the United States. The
workshop’s timing was dif |
|
wy
发帖数: 14511 | 42 About this problem, my conclusion is simple. Internet has potential
to become an intelligent thing. Any single computer cannot.
We need to solve several things: communication speed between any two computers:
for example, if we try to use all available computers in US to solve a
problem, that's possible. But if we want to use computers in China also,
that'll be a hazard--the communication would be too slow. Another thing is
good grid engine to handle large scale computation which is extremely
dif |
|
