C******8
发帖数: 501 | 1 always check your loop invariant |
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s**9
发帖数: 207 | 2 invariable:
p1: start of substring,
p2: end of substring,
hashset: set of chars in substring.
pmax: start of answer so far
lmax: size of answer so far
forword p2, update hashset, pmax, lmax. depending on size of hashset,
forward p1 or p2. |
|
m****s
发帖数: 18160 | 3 【 以下文字转载自 Biology 讨论区 】
发信人: Suave911 (911), 信区: Biology
标 题: Post-doc Position in Vascular Biology/Signal Transduction
发信站: BBS 未名空间站 (Fri Jun 21 10:22:51 2013, 美东)
Post-doc Position in Vascular Biology/Signal Transduction
Molecular Cell Biology, Leiden University Medical Center, The Netherlands
A Post-Doctoral position is available in a dynamic, international and
interdisciplinary research team to study the molecular basis of subverted
TGF- signal transduction in cardiovascular biolog... 阅读全帖 |
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k******o
发帖数: 3328 | 4 Each and every refinancing will incur a few thousand dollars (i.e. title
insurance, escrow fee, lender related charges, credit report fee, etc). If
our promise as mortgage broker to you is No Point No Fee refinancing,
it should be 100% covered, thus mortgage rate is invariably higher than the
case if you pay the closing cost yourself.
Generally No Point No Fee refinancing is preferred option because you
could always refinance in 4 month if the mortgage rate drops again, whereas you
start to enjo... 阅读全帖 |
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t**e
发帖数: 1805 | 5 Too 急了! Give people a break. You are too pushy!
It takes time to engage the listing agent. Nowadays listing agents
invariably are very arrogant. They act as if they were the king or queen of
the world when they get a listing. Be patient. |
|
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w*********s
发帖数: 2136 | 7 Why Almost Everything You Hear About Medicine Is Wrong
http://www.newsweek.com/2011/01/23/why-almost-everything-you-he
If you follow the news about health research, you risk whiplash. First
garlic lowers bad cholesterol, then—after more study—it doesn’t. Hormone
replacement reduces the risk of heart disease in postmenopausal women, until
a huge study finds that it doesn’t (and that it raises the risk of breast
cancer to boot). Eating a big breakfast cuts your total daily calories, or
not—as a st... 阅读全帖 |
|
r**m
发帖数: 1825 | 8 I am always looking for better and safe (if not guaranteed) investment
strategies. Below are personally tested strategies that work for me. If you
know of a similar or better strategy, feel free to let me know!
Short-Term Investment Strategies (less than 6 months)
The definition of short-term is immediate fund availability. This invariably
means money in high interest rate checking or savings accounts. You should
have just enough money to cover daily expenses up to a month out in advance
plus a |
|
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p**t
发帖数: 75 | 9 英国医学杂志社论
http://www.bmj.com/content/328/7442/719.full
The phrase “shaken baby syndrome” evokes a powerful image of abuse, in
which a carer shakes a child sufficiently hard to produce whiplash forces
that result in subdural and retinal bleeding. The theory of shaken baby
syndrome rests on core assumptions: shaking is always intentional and
violent; the injury an infant receives from shaking is invariably severe;
and subdural and retinal bleeding is the result of criminal abuse, unless
proved othe... 阅读全帖 |
|
c*******u
发帖数: 12899 | 10 ☆─────────────────────────────────────☆
debonair (江南小生) 于 (Sat Aug 18 16:58:17 2012, 美东) 提到:
众所周知，中国虽然是乙肝大国，关于乙肝病毒的研究最发达的国家却是美国。
所以，中国医生嘴里的吃饭不传播乙肝病毒当然是转述自西方流行病研究的成果。但真
要探究吃饭是否传播乙肝病毒，还得考虑以下因素。
1. 目前现代医学的看法是，乙肝病毒携带者唾液里面的浓度远低于血液，所以唾液传
播并不是乙肝传播的主要途径。但注意不是主要途径不代表不是途径。
2. 中国人共餐，几乎每天和家人交换唾液。
3. 最要命的是中国人（包括第一代移民）口腔疾病多，牙齿牙龈有伤口出血是常事，
受感染的几率大增。
所以最有效的途径还是通过打乙肝疫苗，实行分餐。
☆─────────────────────────────────────☆
miaomi8 (miaomi8) 于 (Sat Aug 18 17:03:40 2012, 美东) 提到:
挺有道理
当然疫苗是王道
吃饭做不到分餐的话，用公筷公勺
★ 发自i... 阅读全帖 |
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w*********s
发帖数: 2136 | 11 Why Almost Everything You Hear About Medicine Is Wrong
http://www.newsweek.com/2011/01/23/why-almost-everything-you-he
If you follow the news about health research, you risk whiplash. First
garlic lowers bad cholesterol, then—after more study—it doesn’t. Hormone
replacement reduces the risk of heart disease in postmenopausal women, until
a huge study finds that it doesn’t (and that it raises the risk of breast
cancer to boot). Eating a big breakfast cuts your total daily calories, or
not—as a st... 阅读全帖 |
|
B******1
发帖数: 9094 | 12 When a parent intentionaly blocks the access to knowledge or skills training
for a child who is ready for the challenge, the parent might be putting a
child on a not so natural path of development.
Natural does not equal no intervention, or following OLD path. Natural means
leading a child when he or she is ready.
Every success is preceded by failures. Without failed attempts, one would
never taste the sweet of success. By the same token, in order to know if a
child is ready for the challenge, ... 阅读全帖 |
|
u*****a
发帖数: 6276 | 13 In 2005, a 20-year-old Zimmerman was arrested and charged after an
altercation with a police officer. The same year, his ex-fianceé filed a
restraining order against him and accused him of domestic violence.
On Zimmerman's Myspace page, he spoke about what he didn’t miss about his
former home in Manassas,Virginia,
“I dont miss driving around scared to hit mexicans walkin on the side of
the street, soft ass wanna be thugs messin with peoples cars when they aint
around (what are you provin, that y... 阅读全帖 |
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t*******r
发帖数: 22634 | 14 【 以下文字转载自 Mathematics 讨论区 】
发信人: inflation (zigzag), 信区: Mathematics
标 题: 陶哲轩又中大奖了
发信站: BBS 未名空间站 (Tue Jun 24 01:16:49 2014, 美东)
首届数学突破奖，5人，每人300万美元
https://breakthroughprize.org/?controller=Page&action=news&news_id=18
Simon Donaldson, Stony Brook University and Imperial College London, for the
new revolutionary invariants of 4-dimensional manifolds and for the study
of the relation between stability in algebraic geometry and in global
differential geometry, both for bundles and for Fano variet... 阅读全帖 |
|
u*****a
发帖数: 6276 | 15 昂茨这篇文章，其数据分析的方法欠妥。比如，从姓名来确定某人是亚裔还是犹太裔而
不是直接去问/查一下该人的族裔；从某些“智力”或“学科”大赛的获奖人名单及其
姓名来代表其族裔在“优秀”的高中生中的数量等。
楼主如果真去看看其它社会学或统计学的学者，对昂茨文章的分析方法的剖析，就不会
如此崇拜昂茨的真知烁见了。
至于为什么一个犹太裔的学者或律师，居然扇自己族裔的耳光，原因是多方面的。说到
底，一个美国人如果真是想对一个重要问题刨根问底的话，就不该因该问题的起因或解
决方案可能对自己的族裔有不良影响而止步。他们的初衷并不“只”局限于为自己的族
裔谋福利。他们首先是美国学者。族裔只是其出生时就无法改变的一个标签而已（
invariable marker)。 |
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s*****e
发帖数: 6053 | 16 ☆─────────────────────────────────────☆
evolution (Happy Bear) 于 (Sat Apr 11 13:52:48 2015, 美东) 提到:
其他的都是表象。人家搞的就是“Merit Based”。只不过人家的merit不仅仅是当前的
，还要考虑到将来这个人“成功”的几率有多大，这个人的“成功”给母校带来好处几
率有多大，带来好处有多少，等等。换句话说，人家关注某个孩子现在成绩有多好，有
多么“成功”，人家录取的标准是将来这个人有多大几率能成功，学校能从这个人的成
功中获益多少。
比如据说小布什成绩非常差，但是yale要录取他，为什么？人家出身好，人家能成功的
几率比一个sat满分的普通家庭出身的孩子不知道高多少。
人家为什么要多招非裔，因为在现在的政治气候下，一个智力普通，情商正常的非裔将
来成功的几率比分数高几百分的亚裔高多了。本科生的情况不了解，但是如果非裔拿到
博士的话，只要有几篇正常的文章去做faculty简直探探囊取物，华裔呢，就算有CNS一
样很难。
对学校贡献。其他的不说，有几个华裔alumni给母校捐... 阅读全帖 |
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t***h
发帖数: 2924 | 17 【 以下文字转载自 USANews 讨论区 】
发信人: willhung (黄威廉), 信区: USANews
标 题: 黑人学校和黑人世界的真相 - Chris Jackson (转载)
发信站: BBS 未名空间站 (Tue Dec 22 04:08:43 2015, 美东)
发信人: kayaker (霜晨の月), 信区: Military
标 题: 黑人学校和黑人世界的真相 - Chris Jackson
发信站: BBS 未名空间站 (Mon Dec 21 22:28:09 2015, 美东)
What is it Like to Teach Black Students?
by Christopher Jackson
Until recently I taught at a predominantly black high school in a
southeastern state. The mainstream press gives a hint of what conditions are
like in black schools, ... 阅读全帖 |
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d****g
发帖数: 7460 | 18 【 以下文字转载自 History 讨论区 】
发信人: smilhaNew (ha), 信区: History
标 题: 独立节读《独立宣言》zt
发信站: BBS 未名空间站 (Wed Jul 6 11:12:23 2016, 美东)
独立节读《独立宣言》 (2016-07-05 14:18:58)
美利坚合众国第二百四十个独立节之日，重温了一下当时美国立国时杰弗逊起草的《独
立宣言》。
每读一次就不得不再次感慨当时立国之父们的英明及远见。他们在北美这块土地上，抛
弃了大不列颠的君王统治，建立起美利坚这样一个伟大的国家。
一切似乎都是上帝赐予的：这块土地上不仅有雄伟壮观的东部阿普拉契山脉及西部的落
基山脉，而且有着从广袤无际的大草原到美丽宽阔的大海洋，这富绕的土地难道不是一
种恩赐吗？是的，不过上帝恩赐给地球的土地也不仅限于美利坚，算算美利坚的土地面
积，即使现在也只位于全球第三或第四，为何美利坚却成了人们向往的地方呢？
作为移民，也许比这儿生长的美国人有更多的比较。一个感悟是当年《独立宣言》的基
石，即人人生而平等（all men are created equal)，天赋给... 阅读全帖 |
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t******l
发帖数: 10908 | 19 （接上文）。。。我觉得 propertiracy 首先第一步看到的其实是（这里不是说
propertiracy 其他的不看，而是大脑首先要对输入信息剪枝。这个剪枝过程实际上也
决定了 wishful thinking 的先后次序）：
c*p + 1 = n^3
其中 c 是已知整数，p 是未知素数，n 是未知整数。（也就是结构和属性，这里的属
性是 已知 vs 未知，整数 vs 素数）。
（BTW: 这里并不是说 propertiracy 的大脑会把已知整数换成字母去思考，这是给自
己找麻烦。。。我这么写的意思是，我觉得 propertiracy 可能在大脑里 attach 一个
property，比如说 “已知” 这个 property，在那个比如 16 或 18 的数字图景上，
从而影响下一步 wishful thinking 对图景/结构进行剪枝的次序。。。当然人不可能
对自己大脑进行 scan，我这么写下来的是 reasonable guess 大脑的 information
process）。
propertiracy 第二步是意识到这是一个 factorization pr... 阅读全帖 |
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e********t
发帖数: 144 | 20 说说我知道的8岁儿童学习编程的方法
1. 有个利用minecraft 编程的网站，就是你写逻辑，然后就可以挪动block走路的。
我家女娃娃自己可以玩这个，老爹都没有教过。
具体是Minecraft Programming For Kids
2. 高级的可视化编程Scratch Studio. 比如说把for loop 都可视化了，就是外面大块
套里面若干个小块，可以跑在Raspberry Pi。父母有能力的话可以教教关于loop
invariant 的概念。
3. 更高级的有labview给Lego Mindstorm开发的拖拽式编辑逻辑块。有些父母可能在
Phd期间利用Lab view做过实验的，就更容易理解它的玩法了。
我以前工作过的单位还开发过类似niagara controller的产品，工业上叫SCADA的可视
化编程.这个属于终极的大招。
BTW，其实我女儿的专长是写作，我推这个呢，哈哈哈 |
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O****s
发帖数: 463 | 21 做过不少的拓扑学分析，譬如Lie algebra cohomology, BRST cohomology，计算超对
称规范场论和超引力中的topological integral invariants等等
目前考虑相关的凝聚态方向有两个：
1). topological insulator and superconductor
2). AdS/CMT 研究强关联体系
因为这两个方向老板没有connection，所以自己在找，但在physics today上很少见有
这方面的position...
大家都是怎么找的呢？从长远看 我这样转是否合适？是否还有其他好的选择方向？
[从物理版转了下] |
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T**********r
发帖数: 1223 | 22 【 以下文字转载自 Military 讨论区 】
发信人: TradeSmarter (Smarter), 信区: Military
标 题: 国人之愚蠢，看看这个稀土报告就知道了
发信站: BBS 未名空间站 (Thu Oct 14 22:22:08 2010, 美东)
http://web.stratfor.com/images/writers/CHINA_RARE_EARTH_ELEMENTS.pdf?fn=9617327557
China and the Future of Rare Earth Elements
October 14, 2010
clip_image002
STRATFOR
PDF Version
* Click here to download a PDF of this report
A recent diplomatic spat between China and Japan has heightened territorial
tensions and called attention to China’s growing... 阅读全帖 |
|
q*d
发帖数: 22178 | 23 ☆─────────────────────────────────────☆
swjtuer (swjtuer) 于 (Tue Mar 30 23:56:30 2010, 美东) 提到:
星期一
早餐 牛奶，煮鸡蛋，玉米馒头，榨菜
早点 芦柑
午餐 中大：绿豆饭，木须肉，海米冬瓜，棒骨菠菜汤
小婴：绿豆饭，三叶瓜炒肉，海米冬瓜，棒骨菠菜汤
午点 冰糖山楂水，蔬菜饼
晚餐 棒骨冬苋菜瘦肉粥，卤肉秋叶夹馍
星期二
早餐 牛奶，蒸鸡蛋，枣泥糕
早点 香蕉
午餐 中大：胡萝卜饭，芹菜炒牛肉，珊瑚豆腐，棒骨凤尾汤
小婴：胡萝卜饭，芹菜炒肉，珊瑚豆腐，棒骨凤尾汤
午点 果汁，卤猪肝
晚餐 豌豆肉末焖饭，番茄虾皮紫菜汤
星期三
早餐 南瓜粥，卤蛋，如意肉卷
早点 脐橙
午餐 中大：金银饭，咸烧白，海米儿菜，棒骨冬苋菜汤
小婴：金银饭，樱桃肉，海米儿菜，棒骨冬苋菜汤
午点 牛奶，蛋卷
晚餐 米饭，蒜苔炒肉，芙蓉蒸蛋，棒骨海带萝卜汤
星期四
早餐 牛奶，蒸鸡蛋，奶香馒头
早点 苹果
午餐 中大：南瓜饭，什锦鱼丸，韭菜炒豆干，番茄菌类鱼汤
... 阅读全帖 |
|
T**********y
发帖数: 157 | 24 【 以下文字转载自 Faculty 讨论区 】
发信人: TenMilesADay (郭十迈), 信区: Faculty
标 题: 快来看牛逼的27岁教授
发信站: BBS 未名空间站 (Sun Mar 11 13:14:59 2012, 美东)
http://www.ccse.uestc.edu.cn/teacher/teacher.aspx?id=414
所有已经发表论文清单
（发表时间序）
【1】 周涛，傅忠谦，周佩玲，张建荣，张德学，”基于遗传算法的大规模流量
工程问题求解”，计算机应用，2003年第6期，43－45
【2】 杨春霞，周涛，周佩玲，刘隽，基于Multi_Agent的股市经济系统建模与
分析，自动化理论、技术与应用卷十，中国科学技术大学出版社，2003年，596-601（
中国自动化学会第18届青年学术年会会议论文集）
【3】 周佩玲，许民，赵亮，周涛，”混沌信号奇异性检测与外界冲击度量”，
数据采集与处理，Vol.19，195-198，2004
【4】 周涛，徐俊明，刘隽，”图直径和平均距离极值问题研究”，... 阅读全帖 |
|
b*******r
发帖数: 432 | 25 【 以下文字转载自 Gowest 讨论区,原文如下 】
发信人: lapd (Invariable~一颗不变心), 信区: Gowest
标 题: Re: 代友急问：材料被扣，但护照上盖了拒签的章，怎么
发信站: The unknown SPACE (Tue Nov 30 22:07:28 1999) WWW-POST
it only meant ur application recieved.not rejection. |
|
q******n
发帖数: 661 | 26 http://www.forbes.com/2010/04/06/money-motivation-pay-leadershi
New Posts
+2 posts this hour
Popular
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Jon R. Katzenbach and Zia Khan
4/06/2010 @ 12:13PM
Money Is Not The Best Motivator
183
27
4
14
27
The old Horatio Alger stories capture the American dream pretty well. Those
who work hard, apply themselves and play fair, they tell us, will be amply
... 阅读全帖 |
|
T**********r
发帖数: 1223 | 27 【 以下文字转载自 Military 讨论区 】
发信人: TradeSmarter (Smarter), 信区: Military
标 题: 国人之愚蠢，看看这个稀土报告就知道了
发信站: BBS 未名空间站 (Thu Oct 14 22:22:08 2010, 美东)
http://web.stratfor.com/images/writers/CHINA_RARE_EARTH_ELEMENTS.pdf?fn=9617327557
China and the Future of Rare Earth Elements
October 14, 2010
clip_image002
STRATFOR
PDF Version
* Click here to download a PDF of this report
A recent diplomatic spat between China and Japan has heightened territorial
tensions and called attention to China’s growing... 阅读全帖 |
|
M*****8
发帖数: 17722 | 28
a
......................
I don't see your point in complaining either.
Anything wrong with what I said?
I've done research which I doubt you have.
Every time when the media begin touting a
stock, invariably, prices gained downside
potential (even if modest) and that is very
interesting, and that was what I was trying
to illustrate.
It may not be interesting or useful to you
but then I did not specifically post it for
your benefit either. I think you're doing
a disservice by trying to suppress... 阅读全帖 |
|
a*u
发帖数: 2334 | 29 据说中期选举前后是捞底的天堂
American presidents have danced the Quadrennial Quadrille over the past two
centuries. After the midterm congressional election and the invariable seat
loss by his party, the president during the next two years jiggles fiscal
policies to get federal spending, disposable income, and social security
benefits up, and interest rates and inflation down. By Election Day, he will
have danced his way into the wallets and hearts of the electorate and,
hopefully, will have choreographed fou... 阅读全帖 |
|
N********n
发帖数: 8363 | 30 Jim Rickards
There's been a lot of buzz about today's price action in gold and silver.
Beginning with the Monday push upwards based on the Zoellick op-ed in the
Financial Times, the market surged upward through most of the day today and
then hit a serious air pocket with gold falling 2% and silver falling almost
5% in a short period of time late in the trading day.
On a technical basis, there's nothing surprising about that; we've seen
similar moves before and I expect to see them again. The o... 阅读全帖 |
|
c*********o
发帖数: 8367 | 31 美国人哀叹：为何中国比我们还更会搞资本主义？
Local Access打往中国电话卡1.3￠/分种
文章来源: 浪宽 于 2011-01-20 12:49:40 给 浪宽 发送悄悄话
敬请注意:新闻取自各大新闻媒体，新闻内容并不代表本网立场！
美国人哀叹：为何中国比我们还更会搞资本主义？
时代不同了。13年前，江总访美的时候，小克也像今天小奥这样热情接待过老江，可那
时候，美国人是居高临下，把中国当小学生看待，时不时会指点指点、训导训导。而眼
下胡总访美，却让很多美国人心里酸酸的，也说不出是高兴还是难受，反正不太自在吧
。按理说，胡总来一趟，就签了四五百亿的商业合同，美国人应当高兴才对。可当他们
把美国和中国的现况一比，比出差距了，比得不那么自信了，甚至不只是不自信，而是
有点不知所措，有些失落感了。这不，我下面要向大家介绍的这篇文章，作者干脆认输
了。连搞资本主义也干不过中国，那美国人还有什么值得骄傲的呢？
（声明，为了方便，这里采用意译加趣译）
Why China Does Capitalism Better than the U.S.
By... 阅读全帖 |
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s*********8
发帖数: 901 | 32 At Jim Grant's recent conference in London, David Stockman, director of the
White House Office of Management and Budget under Ronald Reagan, explained
why credit exploded:
American lawmakers have been freed of the classical monetary constraints.
There is no monetary squeeze, and there is no reserve asset drain. The Fed
always supplies enough reserves to the banking system to fund any and all
private credit demand at rates which are invariably low.
By 1990, the total debt-to-GDP ratio in the U.S.... 阅读全帖 |
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g*****u
发帖数: 14294 | 33 俺粗浅认知，
1. 控制参数个数。不能有太多参数。
2. 参照统计里面的做法，可能的话，搞搞in-sample learning, out-of-sample
validation.
紫晶是统计专家，她可能比较理解得深。
3. 批评的眼光看待所达到的好结果。机理是很难搞清楚，但可以想像有没有plausible
解释，为什么好。
4. 最终还得实践检验。
本质上，坐shit桶，还是假设市场存在且你能够发掘某种stationary structure, time
-invariant exploitable phenomina. 现实没有那么友善，IT化以后，竞争更加激烈。
待实践检验吧。 |
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b******r
发帖数: 16603 | 34 And right here let me say one thing: After spending many years in Wall
Street and after making and losing millions of dollars I want to tell you
this: It never was my thinking that made the big money for me. It always
was my sitting. Got that? My sitting tight! It is no trick at all to be
right on the market. You always find lots of early bulls in bull markets
and early bears in bear markets. I’ve known many men who were right at
exactly the right time, and began buying and selling stock... 阅读全帖 |
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g*****y
发帖数: 7271 | 35 本质上，time-invariant 假设当然是不对的，不过只要能帮助挣钱，就可以了。
所以一切模型，还是要用挣不挣钱，挣得稳定不稳定来检验啊。bobcat用熵来量
化这个问题，我觉得还不错啊。 |
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u********e
发帖数: 4950 | 36 ☆─────────────────────────────────────☆
bobcat2010 (bobcat2010) 于 (Tue Jul 12 10:27:18 2011, 美东) 提到:
熵增加是宇宙中的一个普遍原理，很多人觉得很玄。下面的表格可看成熵增加原理在股
市中的
见证。表格中的数据是我用信息论的方法得到的，恕我不能披露所用模型的构造。
Entropy
S&P500 SIRI
1/2/98 97.54 95.44
1/7/99 97.85 96.49
1/2/01 98.37 97.65
1/2/08 98.87 98.43
1/4/10 99.04 98.29
1/7/11 99.12 98.42
表格中包含了S&P500 与 SIRI 在不同日期的熵值。最大值规整为100。
定性地说，熵值越高，TA的效果越差，熵值若真达到100，所有TA方法都将失效。
SIRI的熵值显然低于指数的熵值。而在我的套利交易中SIRI算是盈利较多的。一般来说
个股的熵值低于股指的熵值，这是做个股的优势。SIRI的熵值曾一度下降，... 阅读全帖 |
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u****n
发帖数: 7521 | 37 Handbook for Life: 52 Tips for Happiness and Productivity
by Anna W
Around this time of year, people begin making New Year’s resolutions. They
are invariably doomed to failure for the same reason most diets don’t work:
One-offs fail to change the underlying habits and beliefs that drive our
daily behaviors.
That is why I found this list of Zen Habits by Leo Babauta so enchanting.
The full run with an explanation for each bullet point is found at his blog
Zen Habits and is posted under the title ... 阅读全帖 |
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k********8
发帖数: 7948 | 38 http://www.blackstone.com/the-firm/market-commentary/blog-detai
01/04/2012
The Surprises of 2012
All this began to change in October. Data for the U.S. economy began to
improve and the equity market moved back to where it had started the year.
European leaders, recognizing the urgent need for a solution to the
sovereign debt crisis, began to talk of a treaty change that would move the
continent towards a fiscal union. By year-end the 2011 Surprises looked
much better. A blogger, analyzing ea... 阅读全帖 |
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B****o
发帖数: 1393 | 39 China has the best investment record for the riches, among the worst - maybe
just
next to Argentina, for ordinary people. That is a fact. Refer to SSEC
history data for evidence.
I found a investment-corruption research paper, please see abstract below...
There is evidence in the literature that corruption lowers the level of
investment and the productivity of capital stock in an economy. This paper
extends the literature by presenting evidence that investment allocation
decisions are affected i... 阅读全帖 |
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b******r
发帖数: 16603 | 40 And right here let me say one thing: After spending many years in Wall
Street and after making and losing millions of dollars I want to tell you
this: It never was my thinking that made the big money for me. It always was
my sitting. Got that? My sitting tight! It is no trick at all to be right
on the market.
You always find lots of early bulls in bull markets and early bears in bear
markets. I’ve known many men who were right at exactly the right time, and
began buying or selling stocks when pr... 阅读全帖 |
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O**l
发帖数: 12923 | 41 算法自动化设计 核心理论是formal method
用的是 dijkstra weakest precondition， loop invariant...
和尼玛AI 关系不大 |
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f**********r
发帖数: 18251 | 42 【 以下文字转载自 Military 讨论区 】
发信人: fighter644 (武士), 信区: Military
标 题: 原来JK脱口秀是由职业writer团队写出脚本的, Co-head Writer为一白女
发信站: BBS 未名空间站 (Sun Oct 27 15:44:35 2013, 美东)
做了一下研究，发现原来所有的所谓脱口秀都是由职业的Writer们写出脚本script，再
由host来演出的。Jimmy Kimmel脱口秀同样有一个职业写手团队，其Co-head Writer为
一白女，看照片和介绍。
想起来多可笑，现在我们中国人还能够说这不过是一个孩子的童言无忌，一个笑话吗。
这是一个刻意的试探，是我们所有的中国人面临的一个严重的考验。
What It's Like to Write For a Late Night Talk Show
http://splitsider.com/2013/10/what-its-like-to-write-for-a-late
Comedy is an industry. For every performer on s... 阅读全帖 |
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a*******t
发帖数: 1886 | 43 发信人: asmartin (asmartin), 信区: XXXX
标 题: Re: 股市的简化模型 (转载)
发信站: BBS 未名空间站 (Tue Dec 23 01:31:51 2014, 美东)
这个模型大前提是 P(t) = P(t-1) + alpha * (Delta t) + epsilon
P 是股价，t 是时间，alpha 是常数，epsilon 是随机数
事实上alpha 不可能保持常数，那么一个近似成立的模型是，alpha 几乎是invariant
—— given 这一系列操作的时间尺度远小于alpha 变化的时间尺度，并且在这个时间
尺度上，epsilon 带来的variance 要足够小。
结论是我感觉这个策略大概只能在长期稳定的大牛市执行——这种情况下 alpha 变化
的时间尺度很长，可以从容的滤去噪声。在现在的行情下，这种策略应该是不行的。 |
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i********y
发帖数: 346 | 44 哦，我这个策略不是机械化的，是宏观行业和技术面要结合的。技术面为主决定什么时
候exit。具体而言技术面我主要考虑自买入后从高位下落的幅度（下落到一定幅度一定
要离场，这是考虑止损和止盈，并且不同的波动性股票采用不同的幅度，比如nasdaq高
科技股票离场点忍受度比Dow 30股票要高一些）；另一个技术指标是如果该股票最近一
个月，三个月和六个月都跑输S&P500，一定离场(这么做主要考虑剔除弱势股票)；比较
尴尬的是以上两条都不满足，但是某些指标不好（比如虽然六个月跑赢大盘，但是最近
一个月三个月都很弱），这个时候会结合宏观和行业进一步分析(当然，这个股票进场
的时候已经进过宏观和行业的一论过滤了，现在主要看宏观和行业是否有变化)。今年
的市场，我大概现在跑赢S&P500 8个百分点，去年大幅跑赢，前年差不多跑赢13个百分
点，再久之前就没有经历过市场磨练了。我自己确实比较纠结熊市或者猪市会怎么样。
我个人直觉是熊市能跑赢S&P 500，但是绝对收益应该是负的。猪市会比较困难，因为
猪市里可能只有极少数股票会持续上涨，而毕竟考虑到操作成本的缘故我只能选择若干
只（我同一时间点最多持仓... 阅读全帖 |
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q********u
发帖数: 15519 | 45 Zero Hedge Reads
The Perfect Storm For Oil Hits In Two Months: US Crude Production To Soar
Just As Storage Runs Out
Tyler Durden's picture
Submitted by Tyler Durden on 03/21/2015 17:58 -0400
Less than two weeks ago we warned that based on the current oil production
trend, the US may run out of storage for crude as soon as June.
This is what we said back in early March when the BTFDers were hoping WTI in
the low $40s would never again be seen:
Come June, when all available on-land ... 阅读全帖 |
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g****t
发帖数: 31659 | 46 大家看看，下面这2段，像不像老马的文风：
The Blind Pupil.—As long as one knows very well the strength and the
weakness of one's dogma, one's art, one's religion, its strength is still
low. The pupil and apostle who has no eye for the weaknesses of a dogma, a
religion and so on, dazzled by the aspect of the master and by his own
reverence for him, has, on that very[155] account, generally more power than
the master. Without blind pupils the influence of a man and his work has
never become great. To give victory to k... 阅读全帖 |
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s********t
发帖数: 930 | 47 white nationalists看病拒绝华人医生，要求必须是白人
http://www.cnn.com/2017/08/19/us/asian-american-doctor-white-nationalists-race-cnntv/index.html
Dr. Esther Choo is an Asian-American emergency room physician who has
practiced medicine for more than a decade. Yet, she says, a few times a year
, a patient will refuse to let her treat them. Solely because of her race.
Choo, who works in Oregon, first shared her experience of dealing with
racist patients who shun her care in a viral Twitter thread last Sunday.
... 阅读全帖 |
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发帖数: 1 | 48 2007 ................................................... 11.0 5.5 5.5
2008 ................................................... (9.6) (37.0) 27.4
2009 ................................................... 19.8 26.5 (6.7)
看最近三年的营收，最惨的经济危机一年已经过去了，甚至在过后的一年还有个巨大的
反弹，这种20%左右的收益，刚刚在2017年有过，不知道后面还会不会有。
Charlie and I avoid businesses whose futures we can’t evaluate, no matter
how exciting their
products may be. In the past, it required no brilliance for people to
foresee the fabulous growth
that awaited su... 阅读全帖 |
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g*********9
发帖数: 1285 | 49 THE VICE PRESIDENT: Thank you, Ken, for that kind introduction. To the
Members of the Board of Trustees, to Dr. Michael Pillsbury, to our
distinguished guests, and to all of you who, true to your mission in this
place, “think about the future in unconventional ways” –- it is an honor
to be back at the Hudson Institute.
For more than a half a century, this Institute has dedicated itself to “
advancing global security, prosperity, and freedom.” And while Hudson’s
hometowns have changed over the ye... 阅读全帖 |
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g******t
发帖数: 18158 | 50 https://newatlas.com/largest-continuous-oil-gas-us/57579/
Largest ever continuous oil and gas resource found in the United States
ENERGY
David Szondy
December 9th, 2018
Some 46.3 billion barrels of oil, 281 trillion cubic feet of natural gas,
and 20 billion barrels of natural gas liquids are estimated to be underTexas
and New Mexico(Credit: bluebay2014/Depositphotos)
As the United States becomes a net oil exporter for the first time in 75
years, the US Department of the Interior has announced th... 阅读全帖 |
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