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全部话题 - 话题: wald
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a****y
发帖数: 69
1
来自主题: USANews版 - another great female--Lillian Wald
Lillian Wald (1867-1940)
she began the idea of public nurse and really worked hard on it.
link: http://jwa.org/exhibits/wov/wald/lwbio.html
Lillian D. Wald was a practical idealist who worked to create a more just
society. Her goal was to ensure that women and children, immigrants and the
poor, and members of all ethnic and religious groups would realize America’
s promise of “life, liberty and the pursuit of happiness.”
As a young nurse, Wald hoped to provide decent health care to residents of
q**********7
发帖数: 857
2
我在PhysicsForum 上贴了个问题,就直接贴下面了:
Hi all,
I am working on the problems of Wald's General Relativity. I came across
this difficult problem: the 4th problem in Chapter 6.
Part (a) is easy, but I cannot figure out how to prove part (b). Prof. Wald
suggested to use the so-called conservation of energy, but u^a isn't a
geodesic tangent vector. So I feel confused.
I need your help! Thank you!
z********n
发帖数: 710
3
来自主题: Statistics版 - wald confidence limits 很wide??
用proc surveylogistic 出来的结果里面
wald confidence limits 的区间很大:
for instance:
point estimate
3.31
95% wald confidence limits:
0.514 - 21.300
这种情况是不是sample size太小的缘故呢?非常感谢!
m********g
发帖数: 46
4
来自主题: Statistics版 - a question about wald test
如果我有5个数,要用wald test来看这5个数是否一样,怎么算wald test的p-value?
查了下wikii, \hat{theta}应该是平均值,分母的variance也好算,那theta_0是什么
呢?谢谢!
d********t
发帖数: 837
5
Do you know how to do a multivariate wald test? It should be quite obvious
how many parameters you have in the wald test.
s**********e
发帖数: 63
6
来自主题: Statistics版 - a question about wald test
if it is a single parameter, Wald = = (t-stat)^2;
else \hat{\theta_0} is your null hypothesis value.
m********g
发帖数: 46
7
来自主题: Statistics版 - a question about wald test
In my case, there is no null hypothesis value. I just want to test if 5
values are the same and I don't care which number they are equal to. What's
the wald value in my case?
What's t and stat in your expression? Thanks a lot!
h******3
发帖数: 190
8
来自主题: Statistics版 - F test和wald test的联系是什么?
觉得它们挺像的。
但是不确定它们的statistics是不是有联系。平时还是用wald test比较多吧。
多谢。
A****t
发帖数: 141
9
来自主题: Statistics版 - F test和wald test的联系是什么?
If the test statistic (theta.hat-theta0)/SE follows t distribution, t^2 is
an F distribution and they are equivalent.
If it is approximated by a standard normal distribution, then the Wald
statistic follows a chi-square which could be very close to F distribution.
c*********d
发帖数: 9770
10
来自主题: Military版 - 谌旭彬 短史记 微信号
原创:谌旭彬 短史记 微信号 tengxun_lishi
功能介绍
腾讯新闻原创栏目《短史记》,疑今察古,鉴往知来。
图:2018年语文全国II卷作文题。图片引自《重庆晚报》微信号
文 | 谌旭彬
2018年高考语文科目的考试已经结束。
很多人吐槽全国II卷的作文难度太高。
该作文题的具体内容如下:
“二战期间,为了加强对战机的防护,英美军方调查了作战后幸存飞机上弹痕的分布,
决定哪里弹痕多就加强哪里,然而统计学家沃德力排众议,指出更应该注意弹痕少的部
位,因为这些部位受到重创的战机,很难有机会返航,而这部分数据被忽略了。事实证
明,沃德是正确的。
“要求:综合材料内容及含意,选好角度,确定立意,明确文体,自拟标题;不要套作
,不得抄袭;不少于800字。”①
这其实是一道难得的、非常棒的作文题。
因为,在此之前,“逻辑常识”已从中学语文教学中消失了整整三十年,也从未在高考
语文试题中出现过。
久违的“逻辑常识”
与以往的高考作文热衷于提供各种雷人的心灵鸡汤作为素材大不相同,这道题的素材取
自一段真实的历史。
素材中提到的统计学家沃德,即著名的数学家Abraham Wald(1902~1... 阅读全帖
s*********e
发帖数: 1051
11
below was posted on my blog before and hope it helpful.
/************************************************
* ARMA - GARCH ESTIMATION USING PROC MODEL *
************************************************/
data garch;
lu = 0;
lh = 0;
ly = 0;
do i = 1 to 1000;
h = 0.3 + 0.4 * lu ** 2 + 0.5 * lh;
u = sqrt(h) * rannor(1);
y = 1 + 0.6 * (ly - 1) + u - 0.7 * lu;
lu = u;
lh = h;
ly = y;
output;
end;
run;
proc model data = garch;
parms ar1 ma1 mu;
y = mu + ar1 ... 阅读全帖
a****9
发帖数: 642
12
来自主题: WaterWorld版 - 美国的疱疹真是泛滥成灾
啥也不说了 无知
http://www.thehelpernewsletter.org/index.php?option=com_content
Research suggests HSV outside the body begins to degrade fairly quickly. The
real issue is whether or not the herpes virus on objects poses a risk for
transmission. Let us assure you, there is no documentation that HSV has ever
been contracted through inanimate objects. For a clear and concise
explanation, we’ll turn to Managing Herpes: Living & Loving with HSV, by
Charles Ebel and Anna Wald, MD. As Ebel and Wald explain, t... 阅读全帖
k*******a
发帖数: 772
13
来自主题: Statistics版 - 一个低级R 问题
用names(fit)看结果里面返回了什么变量,里面应该会有wald p对应的变量名,比如
wald,那么你用 fit$wald就得到wald p了
l****z
发帖数: 29846
14
http://dailycaller.com/2016/04/22/7-enviro-predictions-from-ear
Environmentalists truly believed and predicted during the first Earth Day in
1970 that the planet was doomed unless drastic actions were taken.
Humanity never quite got around to that drastic action, but
environmentalists still recall the first Earth Day fondly and hold many of
the predictions in high regard.
So this Earth Day, The Daily Caller News Foundation takes a look at
predictions made by environmentalists around the original... 阅读全帖
w********9
发帖数: 64
15
Foreign reporters mailbox (2016)
h****[email protected]中国人权
信息发布:[email protected]/* */
[email protected]/* */国驻华使领馆
[email protected]/* */国驻广州总领馆[email protected]/* */
gov.uk(广州领事处)
[email protected]/* */国驻重庆领事馆[email protected]/* */
gov.uk(重庆领事处)
[email protected]/* */国驻上海总领事处
[email protected]/* */奥巴马
[email protected]/* */白宫[email protected]/* */——subscriptions@
subscriptions.usa.gov
n*****[email protected]新唐人
大纪元投稿Email(海外):[email p... 阅读全帖
m**i
发帖数: 8296
16
【 以下文字转载自 Zhejiang 讨论区 】
发信人: muai (暮霭:俯仰之间 desensitization 地狱之猪), 信区: Zhejiang
标 题: 看到个文章转过来。。。=[
发信站: BBS 未名空间站 (Thu Jul 14 11:13:12 2011, 美东)
挺郁闷的,标题看着那么左的居然挑不出刺儿来。。。=[
《人民日报》究竟怎么了?
http://www.maoflag.net/?action-viewthread-tid-1563935
前两天,《人民日报》发表北京大学生命科学学院院长(据说此人名叫饶毅)的文章,
公开为转基因主粮鼓吹呐喊;今天,《人民日报》再次爆发惊人之语:中越南海主权争
议可留给后人解决!
这样两篇冒天下之大不韪的文章居然接连刊登在《人民日报》上。我简直不敢想象这预
示着什么?
《人民日报》是当今中国的正牌党报,是中国共产党的喉舌。而现在刊登出这样的破烂
文章,这究竟是代表了党中央的决议,还是主编大人和文章作者们的个人意见?还是,
你们的美国主子的授意?
与这两篇文章相对应的,是美国美军参谋长联席会议主席迈克-马伦上将访问中国。... 阅读全帖
m**i
发帖数: 8296
17
来自主题: Zhejiang版 - 看到个文章转过来。。。=[
挺郁闷的,标题看着那么左的居然挑不出刺儿来。。。=[
《人民日报》究竟怎么了?
http://www.maoflag.net/?action-viewthread-tid-1563935
前两天,《人民日报》发表北京大学生命科学学院院长(据说此人名叫饶毅)的文章,
公开为转基因主粮鼓吹呐喊;今天,《人民日报》再次爆发惊人之语:中越南海主权争
议可留给后人解决!
这样两篇冒天下之大不韪的文章居然接连刊登在《人民日报》上。我简直不敢想象这预
示着什么?
《人民日报》是当今中国的正牌党报,是中国共产党的喉舌。而现在刊登出这样的破烂
文章,这究竟是代表了党中央的决议,还是主编大人和文章作者们的个人意见?还是,
你们的美国主子的授意?
与这两篇文章相对应的,是美国美军参谋长联席会议主席迈克-马伦上将访问中国。难
道说,马伦上将除了光明正大的“公事”以外,还担负着宣抚众多狗奴才的“私事”么
?难道说,马伦上将已经把狗奴才们梦寐以求的美国绿卡发放下去了?不然的话,这群
狗奴才们怎么会兴奋得上蹿下跳,以至于在堂堂的党报上发表卖国言论?
转基因的事情我就不多说了,许多网友已经把那篇狗屁文章批驳得体无完肤... 阅读全帖
j*******y
发帖数: 58
18
what does that mean 'logistic regression has 3 methods, wald, LR and scoring
method'?
wald, lr and score test are testing methods which requiring
estimates of unknown parameters in the logistic regression. the estimating
is done by MLE and the computation is done by NR or iterative methods.
actually wald, lr and score test are asymptotially the same. All these are
broadly based on MLE idea. When you try to mazimize a function, you can take
derivative of the function and it becomes first order de... 阅读全帖
h***b
发帖数: 43
19
来自主题: Statistics版 - proc genmod 结果的问题
我没系统学习过GLM,就是在网上自学了一下,有个问题想请教一下,问什么下面的结
果里面每个categorical variable最后一组的Wald Chi-Square 和 Pr > ChiSq 都是 .
? 谢谢!
Analysis Of Maximum Likelihood Parameter Estimates
Parameter DF Estimate Standard Error Wald 95%
Confidence Limits Wald Chi-Square Pr > ChiSq
Intercept 1 -1.3168 0.0903 -1.4937 -1.1398 212
.73 <.0001
car large 1 -1.7643 0.2724 -2.2981 -1.2304 41.96
<.0001
car medium 1 -0.6928 ... 阅读全帖
D**u
发帖数: 288
20
来自主题: DataSciences版 - 问一道面试题
笼统的说用Posterior Beta 和 Normal都可以,但是一般的网页CTR都非常小,不要忘
记Normal approximate Binomial对 p是有要求的,不能太小。所以最好还是用
Posterior Beta 。
道理都是一样的,先确定一个error bound,10%, 5%, 或者1%, 然后,根据
Posterior Beta或者Normal的standard deviation的表达式计算n。
幸运的是,两个distribution的standard deviation的表达式都很简单,可是计算过程
中,都还需要额外的参数, 那就是p0对于Normal,(a,b)对于Posterior Beta 。
所以你的link中的针对Normal的Wald方法,直接取p0=0.5了,这样就有一个很简单的式
子可以用了。这是个maximum variance 假设,但是,这个对于CTR来说偏差太大了,不
建议使用,当然还有一些更复杂方法的来correct Normal的这个issue, 不过表达式都
很复杂。当然,你若问是否可以估计一个相对较小的p0,比如0.01,答... 阅读全帖
p****s
发帖数: 3184
21
你是诺贝尔奖吗?不是也请你滚蛋,别装大尾巴狼吧。
“It is all too big and is happening too fast. So this, the central problem,
remains almost unconsidered. It presents probably the largest ethical
problem that science has ever had to face. Our morality up to now has been
to go ahead without restriction to learn all that we can about nature.
Restructuring nature was not part of the bargain. For going ahead in this
direction may be not only unwise, but dangerous. Potentially, it could breed
new animal and plant diseases, n... 阅读全帖
c***r
发帖数: 4631
22
Gellert Grindelwald
Gellert是匈牙利语, 对应的英语是Gerard,是Ger+hard的意思。Ger是长矛的意思,
hard在人名里面表示tough的意思。相关的词有bastard,drunkard。
Grindelwald这个名字土人俺首先想起来的就是Beowulf里面的大反派Grendel。
Beowulf的故事是这么开始的:
Hwæt! We Gardena in geardagum...
翻译成现在的英语就是
Hey! We the ger(spear) Danes in the old days...
不知道大家注意到里面的Gar没有,就是前面的Gerard里面的Ger。
这些Danes在国王Scyld的领导下过着天天喝Mead(蜂蜜酒)的幸福生活。后来这些
Danes被一个叫Grendel的住在水里的怪物骚扰,Grendel会把人抓走吃肉。没人能战胜
Grendel。后来来自北方的Geats人大英雄Beowulf来帮这些Danes,杀了Grendel。(
Scyld帮过Beowulf他爹,所以Beowulf是来报恩的... 阅读全帖
c***r
发帖数: 4631
23
Gellert Grindelwald
Gellert是匈牙利语, 对应的英语是Gerard,是Ger+hard的意思。Ger是长矛的意思,
hard在人名里面表示tough的意思。相关的词有bastard,drunkard。
Grindelwald这个名字土人俺首先想起来的就是Beowulf里面的大反派Grendel。
Beowulf的故事是这么开始的:
Hwæt! We Gardena in geardagum...
翻译成现在的英语就是
Hey! We the ger(spear) Danes in the old days...
不知道大家注意到里面的Gar没有,就是前面的Gerard里面的Ger。
这些Danes在国王Scyld的领导下过着天天喝Mead(蜂蜜酒)的幸福生活。后来这些
Danes被一个叫Grendel的住在水里的怪物骚扰,Grendel会把人抓走吃肉。没人能战胜
Grendel。后来来自北方的Geats人大英雄Beowulf来帮这些Danes,杀了Grendel。(
Scyld帮过Beowulf他爹,所以Beowulf是来报恩的... 阅读全帖
b**********n
发帖数: 2812
24
With Quest to Cool Fuel Rods Stumbling, U.S. Sees ‘Weeks’ of Struggle
By NORIMITSU ONISHI, DAVID E. SANGER and MATTHEW L. WALD
TOKYO — Amid widening alarm in the United States and elsewhere about Japan
’s nuclear crisis, military fire trucks began spraying cooling water on
spent fuel rods at the country’s stricken nuclear power station late
Thursday after earlier efforts to cool the rods failed, Japanese officials
said.
The United States’ top nuclear official followed up his bleak appraisal of
t... 阅读全帖
G******d
发帖数: 364
25
来自主题: Military版 - 德国才是真正的韬光养晦
it is true.
Hans-Peter Richter 2007, August
(German Peace Council)
Foreign Military Bases in Germany
Today there are 72 locations in Germany used by the US military Forces and
about 68,000 soldiers. The British Forces use 5 locations and have 25,000
soldiers in Germany. In the summer of this year about 8,500 soldiers will be
withdrawn from Germany and three basses will be given up. All this soldiers
have their home base in Germany. At no time all this soldiers are in
Germany, because always some... 阅读全帖

发帖数: 1
26
来自主题: Military版 - 单兵干掉100多人?
一梭子干翻40个?
http://en.wikipedia.org/wiki/Richard_Cowan_(soldier)
Rank and organization: Private First Class, U.S. Army, Company M, 23d
Infantry, 2d Infantry Division. Place and date: Near Krinkelter Wald,
Belgium, 17 December 1944. Entered service at: Wichita, Kans. Birth: Lincoln
, Nebr. G.O. No.: 48, 23 June 1945.
Citation:
He was a heavy machinegunner in a section attached to Company I in the
vicinity of Krinkelter Wald, Belgium, 17 December 1944, when that company
was attacked by a numerically... 阅读全帖
m*********a
发帖数: 3299
27
来自主题: USANews版 - 杀光亚裔,对美国屁影响没有
Jews .2% of world population, 20% of all Nobel prices, 40% of USA nobel
price, won more than 160 nobels.
All Asian are junk compare to Jewish people in your standard.
Literature[edit source | edit]
Year Laureate Country Rationale
1927 Bergson-Nobel-photo.jpg Henri Bergson[9][10] France "in
recognition of his rich and vitalizing ideas and the brilliant skill with
which they have been presented"[11]
1958 Boris Pasternak cropped.jpg Boris Pasternak[9][10] Sov... 阅读全帖
l******n
发帖数: 256
28
1。载重买菜车:01.jpg
Frame: a steel frame donated by a Roadmaster
Handlebar: steel, donated by the Roadmaster
Grips: Scwinn Ergo Comfort Grips
Brake levers: Origin 8
Rear Shifter: Shimano Altus M310
Stem: alloy, donated by the Vilano single speed
Stem adapter: Tranz X
Headset: Sunlite Chrome Steel
Fork: Pyramid Chrome
Brakes: Origin 8 ATB V-Brake set
Saddle: Ventura ASA MTB
Seatpost: Action 22" 25.4, Chomoly
Tail Light: Planet Bike Superflash
Water Bottle Cage: Sunlite Alloy
Chain: KMC Z50
Bottom Brac... 阅读全帖
c***r
发帖数: 4631
29
来自主题: LeisureTime版 - 哈利波特的魔法世界后面的故事
Gellert Grindelwald
Gellert是匈牙利语, 对应的英语是Gerard,是Ger+hard的意思。Ger是长矛的意思,
hard在人名里面表示tough的意思。相关的词有bastard,drunkard。
Grindelwald这个名字土人俺首先想起来的就是Beowulf里面的大反派Grendel。
Beowulf的故事是这么开始的:
Hwæt! We Gardena in geardagum...
翻译成现在的英语就是
Hey! We the ger(spear) Danes in the old days...
不知道大家注意到里面的Gar没有,就是前面的Gerard里面的Ger。
这些Danes在国王Scyld的领导下过着天天喝Mead(蜂蜜酒)的幸福生活。后来这些
Danes被一个叫Grendel的住在水里的怪物骚扰,Grendel会把人抓走吃肉。没人能战胜
Grendel。后来来自北方的Geats人大英雄Beowulf来帮这些Danes,杀了Grendel。(
Scyld帮过Beowulf他爹,所以Beowulf是来报恩的... 阅读全帖
c***r
发帖数: 4631
30
来自主题: LeisureTime版 - 哈利波特的魔法世界后面的故事
Gellert Grindelwald
Gellert是匈牙利语, 对应的英语是Gerard,是Ger+hard的意思。Ger是长矛的意思,
hard在人名里面表示tough的意思。相关的词有bastard,drunkard。
Grindelwald这个名字土人俺首先想起来的就是Beowulf里面的大反派Grendel。
Beowulf的故事是这么开始的:
Hwæt! We Gardena in geardagum...
翻译成现在的英语就是
Hey! We the ger(spear) Danes in the old days...
不知道大家注意到里面的Gar没有,就是前面的Gerard里面的Ger。
这些Danes在国王Scyld的领导下过着天天喝Mead(蜂蜜酒)的幸福生活。后来这些
Danes被一个叫Grendel的住在水里的怪物骚扰,Grendel会把人抓走吃肉。没人能战胜
Grendel。后来来自北方的Geats人大英雄Beowulf来帮这些Danes,杀了Grendel。(
Scyld帮过Beowulf他爹,所以Beowulf是来报恩的... 阅读全帖
v*******o
发帖数: 10
31
来自主题: Quant版 - probability questions
if so, what is E[x] in wald's equality? 2p-1 is the expected change for one
flip, E[Sn] should be expected change too? can you explain more details of
wald's equation?
L**********u
发帖数: 194
32
来自主题: Quant版 - 【Probability】老题 Fair coin
This problem can be solved by Wald's Equality.
Let X_i= either 2 or -1 with probability 1/2 respectively. N be the stopping
rule.
The gain can be written as
S=50+X_1+X_2+.....X_N.
By Wald's equality
E[S]=50+E[X_i]E[N]=1/2E[N].
and
E[N]=50/2^{50}+53/2^{53}+56/2^{56}+...+100*(1-1/2^{50}-1/2^{53}-1/2^{56}-...)
If you just want an approximation, then you can say E[S]=100 since the
probability
1-1/2^{50}-1/2^{53}-1/2^{56}-... is almost 1. i.e. E[N] is almost 100
s*******f
发帖数: 148
33
要做几十个simple logistic regression,然后将每个模型中Wald Test得到的Wald
Chi-square, p-value, OR, CI提出来,列成表格。不太高兴对着每个output找对应的
值再填到表格里去,想偷懒让SAS自己汇报,不知道是否可行?
知道在PROC FREQ下面可以通过 OUTPUT OUT = NewSet chisq; 保存分析结果,这样后
面就可以提取p-value等等。不过PROC LOGISTIC里面找了半天,好像没有对应chisq的
option可以把p值什么都保存下来。是不是我的思路不对头?虚心求教:)
r***r
发帖数: 123
34
Here is the example in the SAS manual.
http://support.sas.com/documentation/cdl/en/statug/63033/HTML/default/viewer.htm#/documentation/cdl/en/statug/63033/HTML/default/statug_genmod_sect055.htm
Analysis Of Maximum Likelihood Parameter Estimates
Parameter DF Estimate Standard Error Wald 95% Confidence Limits Wald Chi-
Square Pr > ChiSq
Intercept 1 6.1302 0.1043 5.9257 6.3347 3451.61 <.0001
mfg A 1 0.0199 0.1559 -0.2857 0.3255 0.02 0.8985
mfg B 0 0.0000 0.0000 0.0000 0.0000 . .
Scale 1 0.827
s********p
发帖数: 637
35
来自主题: Statistics版 - How to transform predictor variable?
受教了,很有启发
我就回复一点,既然你提到了我上面说的“写macro把各种常用的transformation都做
一遍,然后用自动选个walds最大的。这样做的问题是所有的transformation可能都很
烂”,我就解释一下。你说的,我同意,如果所有的transformation都很烂的话
,就基本能决定这个变量没有什么太多用或可以由其他变量替换,不必过多纠结。我一
般是在50个变量左右的时候进行变换筛选,实际上,对于比较重要的变量,10次有5次(大约吧)能找到比较好的变换,对modeling 很有帮助。
我不觉得我的方法有多好,不fancy,又没什么理论,虽然简单,但实际工作中却是有效。想想,如果常用的3,40个简单变换都不能比较好的拟合,那种假设存在的transformation还有什么意义?我虽然反驳过yuxuxin,但我的看法和他还是基本一致的,变量本身如果很不significant,基本上就不要过多纠结了,除非某些原因非要用这个不可。我这几年做的上百的model基本都是这个样子的。
我以前看过一本书,好像叫database marketing什么的,作者用遗传算法控制参数... 阅读全帖
d**s
发帖数: 1255
36
来自主题: Statistics版 - 一个低级R 问题
问题:
有很多这样的 x ,要找出每个x 的 Wald p value。
用什么code能取出 wald P
one sample code:
s*********e
发帖数: 944
37

谢谢!长见识了。我原来还以为只有logistic regression有wald test呢~~~~
你的这个提议很make sense!
不过有一个问题就是,wald test是用var(beta-hat),但是对于linear regression来说,我们不知道true standard deviation,所以用t-test,这个问题怎么解决呢?
谢谢!
S*x
发帖数: 705
38
来自主题: Statistics版 - logistic regression结果释疑,解读
52个肯定多,有没有做proc corr来看variable之间的相关性? 有些时候很多variable是
成对成对出现的
你按照wald score排序来做一个cumulative wald score,肯定会发现最后
那些var都是用不到的
另外你这个图只显示model本身,logistic regression的somer's D呢? c score呢?
如果以上的数据都不错,你还得需要看validation来证明model是可用的
l******r
发帖数: 18699
39
来自主题: Statistics版 - 请教一个随机过程的问题?
wald equality
先证S是个martingal,然后m是个stopping time
then by wald equality you can get it

and
z******n
发帖数: 397
40
对于另外一种类似的情况也可以同样分析
假定题目是说模型 y=b1*x1+ b2*x2 + e 中b1 b2各自的两个wald test都显著(而不是
像上面那样说两个简单模型中的c1 c2显著)
则用和上面同样的记号,两个wald stat(出去一个常数因子var(e))大致是
(T1-r * T2)^2/(1-r^2)
(r * T1 - T2)^2/(1-r^2)
对于两个参数的联合检验仍然有统计量
T= (T1^2 - 2*r*T1*T2 + T2^2)/(1-r^2)
具体的结论就不分析了,应该大致相同
u***************r
发帖数: 11227
41
来自主题: Headline版 - unidentified_title
发信人: inews(inews), 信区: Headline
标题: 18岁少年性侵邻居 事后竟要求这样抵罪
发信站: BBS未名空间站(Fri Oct 13 09:08:36 2017,GMT)
据《纽约时报》报道,当地时间6日,美国佛罗里达州一名18岁男子半夜戴着面具,闯入邻居家中性侵女主人。事后男子竟摘下面具,主动向被害女主人申请以“整理后花园”、“打理家务”,作为此次性侵的补偿。最后,该男子因触犯持武器性侵、窃盗、非法拘禁3项控罪,被警方逮捕归案。
这位18岁男子名叫沃丁(Timothy Adam Walding),在6日深夜,他戴着面具闯入女邻居家中。当时女邻居正在卧室睡觉,沃丁用刀抵在女邻居的脖子上,且威胁她不要出声。
报道称,沃丁将女邻居的双手绑在床上,对其进行性侵。事后沃丁并没有逃跑,他还主动摘下面具,让女邻居认出他就住在附近。
随后,沃丁解开了女邻居的双手,让其到室外抽烟冷静。他“劝导”女邻居说,“你真该把门锁好的,我不想施暴,但又不得不这样做”。
《每日邮报》报道称,沃丁表示,目前他正在军中服役,所以事发后2人“就算住隔壁也不会尴尬”。
沃丁还问女邻居,他能否通过... 阅读全帖
k**x
发帖数: 2611
42
A descriptive table of Modified Mercalli Intensity is available from ABAG (
Association of Bay Area Governments). A table of intensity descriptions with
the corresponding peak ground acceleration (PGA) and peak ground velocity (
PGV) values used in the ShakeMaps is given below. ShakeMap uses PGA to
estimate intensities lower than V, it linearly combines PGA & PGV for
intensities greater than V and less than VII, and it uses PGV for
intensities greater than VII (See Wald et al., 1999b, for more d
g*q
发帖数: 26623
43
As an effort to simplify and maximize the flow of information to the public
, we have developed a means of generating estimated Modified Mercalli
Intensity maps based on instrumental ground motion recordings (Wald et al.,
1999). These "Instrumental Intensities" are based on a combined regression
of peak acceleration and velocity amplitudes vs. observed intensity for
eight significant California earthquakes (1971 San Fernando, 1979 Imperial
Valley, 1986 North Palm Springs, 1987 Whittier, 1989 Lom
b**********n
发帖数: 2812
44
Last Defense at Troubled Reactors: 50 Japanese Workers
By KEITH BRADSHER and HIROKO TABUCHI
A small crew of technicians, braving radiation and fire, became the only
people remaining at the Fukushima Daiichi Nuclear Power Station on Tuesday
— and perhaps Japan’s last chance of preventing a broader nuclear
catastrophe.
They crawl through labyrinths of equipment in utter darkness pierced only by
their flashlights, listening for periodic explosions as hydrogen gas
escaping from crippled reactors ign... 阅读全帖
l**m
发帖数: 5113
45
对这种有牺牲精神的人我表示敬意

Last Defense at Troubled Reactors: 50 Japanese Workers
By KEITH BRADSHER and HIROKO TABUCHI
A small crew of technicians, braving radiation and fire, became the only
people remaining at the Fukushima Daiichi Nuclear Power Station on Tuesday
— and perhaps Japan’s last chance of preventing a broader nuclear
catastrophe.
They crawl through labyrinths of equipment in utter darkness pierced only by
their flashlights, listening for periodic explosions as hydrogen gas
escaping from crip... 阅读全帖
w********l
发帖数: 11447
46
来自主题: Military版 - 林丹好像也不灵光阿。
呵呵,你还知道带参的和不带参的两种检验阿。还行。
我说的不是忽悠人的词汇,这些都是基础。我既然问你原理,当然希望你给出点解释。
我并没有跟你说得更多,你那个z-test只是最简单的wald test. 要说到复杂还可以复
杂的多。
你就算认为likelihood麻烦点,至少也要通过random variable来解释你的z-test. 可
惜你没有,却选择最业余的1,2,3。 来解释。我还没有难为你,有没有考虑同一场地比
赛的相关性问题。其实,你那个测试做得非常不严谨。
如果,你学过统计,应该知道我跟你讨论的是最基础的东西,并没有忽悠人的词汇。当
然,你要这么认为,那就说明你很业余。有的英文词语是我不知道中文是啥。你既然学
过统计应该知道,英文术语经常更直观明了。当然,业余水平的,就很难说了
还有,别动不动摆出一个居高临下的姿态,让别人别啥啥啥的。你统计在我看来就是一
般般,也就是个半瓶子醋的水平。
e*******n
发帖数: 4912
47
来自主题: Military版 - 方是个物理天才
老方能不能看懂WALD?

QFT
y****t
发帖数: 9189
48
http://www.fyjs.cn/bbs/htm_data/25/1209/771936.html
Ashanti (Canada) 10 hrs ago
China's navy is still at least 26 years behind Indian Navy. INS Viraat was
induced in April 1986.
Agree (7)Disagree (18)Recommend (2)
中国海军至少落后印度海军26年。印度的维拉特号航母1986年4月就服役了。
Cameron (UK) replies to Ashanti 7 hrs ago
Only 26 years? I thought it's a few hundred years.
Agree (4)Disagree (0)Recommend (0)
只有26年?我还以为是几百年呢。
badegg (US) replies to Ashanti 8 hrs ago
I think it will take China at least 20 years to catch up with ... 阅读全帖
e*******n
发帖数: 4912
49
那我室友还得零蛋呢
那老师取的是分布
最后一名(估计是我室友)60分
第一名9x,我是第三不知道第五的
那卷子是照课后习题的难度出的
开卷
一个天天在啃wald的家伙最后分数也是6x,天知道他都干了些什么
R****a
发帖数: 6858
50
【 以下文字转载自 USANews 讨论区 】
发信人: Regina (猫宝宝), 信区: USANews
标 题: 美国诺贝尔奖物理化学医学得主列表 有老黑老墨没?
发信站: BBS 未名空间站 (Sun Jan 6 14:24:29 2013, 美东)
华人人口240万(有身份的),获奖人数7人,平均每百万2.916人。
犹太人630万人口,获奖人数47人,平均每百万7.46。
红脖子,获奖人数193,人口2亿,平均每百万0.965人。
老黑人口3870万,老墨人口5050万,他们的物理化学医学得主呢?怎么一个都没找到?
他们的人口可是华人和犹太人的好几倍啊。
另外,华人是1943年废除排华法案以后才来到美国的,比犹太人晚了半个多世纪,因为
肤色跟白人差距较大,奋斗业更难。
==============================================
CHEMISTRY (64 awards)
ECONOMIC SCIENCES (51 awards)
LITERATURE (11 awards)
1914, Chemistry, Theodore W. Ri... 阅读全帖
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