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全部话题 - 话题: constraints
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F*M
发帖数: 104
1
来自主题: SanFrancisco版 - CALL TO ACTION - College Admission (zz)
(*Source: "No Longer Separate, Not Yet Equal: Race and Class in Elite
College Admission and Campus Life" by Thomas Espenshade (Princeton
University Press, 2009)
A historical moment has arrived. On February 21, 2012, the Supreme Court
decided to review a pending lawsuit that challenges the prevalence use of
strong racial preferences in college admission.
Please take this survey to project your voice to the Supreme Court.
http://admin.80-20nj.info/cgi/80/e?l=8/11e/f&w=no
Your children’s f... 阅读全帖
G***o
发帖数: 5158
2
投票支持 (for) 80-20的立场。
【 以下文字转载自 SanFrancisco 讨论区 】
发信人: quantx (X矿工), 信区: SanFrancisco
标 题: 【紧急投票】改写亚裔孩子要比非裔SAT高450分才能入名校的现实 (转载)
发信站: BBS 未名空间站 (Tue Feb 28 02:28:25 2012, 美东)
发信人: alderbrook (Alderbrook), 信区: Military
标 题: 【紧急投票】改写亚裔孩子要比非裔SAT高450分才能入名校的现实
发信站: BBS 未名空间站 (Tue Feb 28 01:45:41 2012, 美东)
【紧急投票动员】改写亚裔孩子要比非裔SAT高450分才能入名校的现实
决战最高法院, 请投庄严一票,来捍卫你孩子公平竞争入学名校的机会
请置顶,请在以下网页签名,请转发!
http://admin.80-20nj.info/cgi/80/e?l=8/11e/f&w=no
-----------------
历史性的时刻已经到来了:2/21/2012,美国最高法院决定审理用“族裔”的理由来提... 阅读全帖
b****u
发帖数: 37
3
如果感兴趣的话请发简历到n****[email protected],标题请注明Contract to Fulltime
Drupal Developer--Seattle WA,谢谢!
Job Description
We’re seeking a Drupal Developer who will partner with our development &
design teams as well as our clients to create cutting edge web and mobiles
sites and applications. As a Developer you will be responsible for providing
great code, smart ideas and continually helping with the overall
improvement and growth of the development team.
Our ideal candidate is a true technologist, smart, eager t... 阅读全帖
c****e
发帖数: 3522
4
Please cast your vote (FOR).
----------------------------------------------------------------------------
------------------------------------------------
紧急动员:决战最高法院, 请投庄严一票
捍卫你孩子公平竞争入学名校的机会
历史性的时刻已经到来了:2/21/2012,美国最高法院决定审理用“族裔”的理由来提
高亚裔和白人高校入学门槛的做法是否违宪。您--关爱孩子未来的父母--现在就可以花
一分钟时间来帮助孩子增大孩子上他们理想大学的机会。请您立即投票赞成(FOR) 80
-20全美亚裔教育基金会的民调书,清楚明白地表明亚裔在这件案子上的立场。
http://admin.80-20nj.info/cgi/80/e?l=8/11e/f&w=no
资料显示,亚裔在美国要比其他族裔成绩优秀许多才能上同样的学校。要上同样的名校
,亚裔SAT要考1550分,白人1410分,而非裔只需要1100分*(英文和数学满分是1600)
。亚裔入学这么... 阅读全帖
G****6
发帖数: 4291
5
转载而已,本人没有核实是否有此一说。 如有不妥,请板斧直接删帖。
--------------- 下面是转载的信息 -------------------
----- Forwarded Message -----
Sent: Tuesday, February 28, 2012 11:23 AM
To: Subject: FW: Fro Haibo: 紧急动员:决战最高法院, 请投庄严一票 捍卫你孩子
公平竞争入学名校的机会
Hi Friends,
Please vote “For’ for our children’s future after access the following
linkage in yellow: 紧急动员:决战最高法院, 请投庄严一票捍卫你孩子公平竞争入
学名校的机会
历史性的时刻已经到来了:2/21/2012,美国最高法院决定审理用“族裔”的理由来提
高亚裔和白人高校入学门槛的做法是否违宪。您--关爱孩子未来的父母--现在就可以花
一分钟时间来帮助孩子增大孩子上他们理想大学的机会。请您立即投票赞成(FOR) 80
-20全美亚裔教育基金会的民调书,清楚... 阅读全帖
F*V
发帖数: 3978
6
来自主题: CanadaNews版 - 大棋局与9/11
大棋局与9/11
来源: ognc 于 2013-02-22 16:08:44[档案] [博客] [旧帖] [转至博客] [给我悄悄
话] 本文已被阅读:63次
字体:调大/调小/重置 | 加入书签| 打印| 所有跟帖 | 加跟贴| 查看当前最热讨论主题
The Moral Decoding of 9-11
By Prof. John McMurtry
(Journal of 9/11 Studies) - I was sceptical of the 9-11 event from the first
time I saw it on television. It was on every major network within minutes.
All the guilty parties were declared before any evidence was shown. The
first questions of any criminal investigation were erased. Who had the most
compelling motives for... 阅读全帖
p***r
发帖数: 20570
7
来自主题: Bridge版 - 叫牌问题(11)
par contest is very different from real bridge situations. Gib is not bad in
par contest simply because in par contest a lot of constraints can be
supplied. In real life, that's totally a different issue. You have to figure
out defender's possible holding all by yourself. Also, in par contest, you
just solve the problem. In real life bridge, your opps intentionally seek
your holes and weakness to take the maximum profit out of them.
Unfortunately, there are just way too many holes in gib's playi... 阅读全帖
p***r
发帖数: 20570
8
来自主题: Bridge版 - 叫牌问题(11)
Let me set it straight. Most constraints set by gib are based on total
points. A certain bid usually means a certain amount of total points and
some shape and suit quality information. Then the rules are just based on
total points. Here comes the key problem, both no trumps and trumps are
based on the same total points system. The total points are based on HCP and
distributions. It is simply absurd to count a void as a 3 total point asset
in no trumps. However, gib does that in every hand. So as... 阅读全帖
a*****g
发帖数: 19398
9
(转载)Why It's Hard to Create A Strong Go Software
For a long time it was a widely held opinion that computer Go posed a
problem fundamentally different to computer chess insofar as it was believed
that methods relying on fast global search compared to human experts
combined to relatively little domain knowledge would not be effective for Go
. Therefore, a large part of the computer Go development effort was during
these times focused on ways of representing human-like expert knowledge and
combini... 阅读全帖
d********e
发帖数: 925
10
【 以下文字转载自 Living 讨论区 】
发信人: daxigua111 (方教主), 信区: Living
标 题: 【请置顶 紧急投票】改写亚裔孩子要比非裔SAT高450分才能入名校 (转载)
发信站: BBS 未名空间站 (Wed Feb 29 15:35:00 2012, 美东)
发信人: tools (aaaaa), 信区: WaterWorld
标 题: 【请置顶 紧急投票】改写亚裔孩子要比非裔SAT高450分才能入名校(转载)
发信站: BBS 未名空间站 (Wed Feb 29 12:12:34 2012, 美东)
发信人: alderbrook (Alderbrook), 信区: Parenting
标 题: 【请置顶 紧急投票】改写亚裔孩子要比非裔SAT高450分才能入名校的现实
发信站: BBS 未名空间站 (Tue Feb 28 01:38:53 2012, 美东)
【紧急投票动员】改写亚裔孩子要比非裔SAT高450分才能入名校的现实
决战最高法院, 请投庄严一票,来捍卫你孩子公平竞争入学名校的机会
请置顶,请在以下网页签名,请转发!
http://a... 阅读全帖
z*i
发帖数: 58873
11
我就有两个感觉:
1. there is a difference between censorship (from outside) and constraint (
from inside)
2. there is no difference between censorship (you can't say THESE!) and
constraint (you have to say THESE!)
w**m
发帖数: 4061
12
哈,我就想说这个
两个东西,censorship更具象,正如你说的是outside加给你的
constraint这个东西更抽象。任何一个作家都不可能脱离他所在的客观环境独立存在,
再空泛一点说,一个人在青少年学说话学写字的过程,就是不断地给自己加上各种限制
、束缚(constraint)的过程,你在获得语言的过程中就注定要接受你所在的背景环境
里的语言烙印。
究竟是思维影响语言,还是语言限制思维,估计是个蛋生鸡鸡生蛋的问题。
当你成年后开始运用语言进行创造性写作的时候,那些有时代特色,政治特色,民族特
色,宗教特色的语言以及思维已经潜移默化的成了你的一部分,这些束缚已经是从
inside来限制你了。就象孙悟空头上的紧箍咒,实质上的圈子已经勒进你脑子里面去,
变成了一种思维上的禁锢。
问题是这个东东,是个人就有,和语言文字打交道的作家尤甚,莫言有,狄更斯有,蒲
松龄有,莎士比亚也有。
肉身沉重,也许这个重不仅仅是指体重,但是沉重的肉身,有烙印的语言一定能创造出
脱离所在时代而独立存在甚至流传下去的作品,所以我在2012年读不同语言不同年代的
作品还是会引发我情绪上的波动,有喜怒哀乐,有嬉... 阅读全帖
a*********a
发帖数: 3656
13
it is of course easy to be smart after the fact, we shoot under various
constraints, and sometimes we can not get closer, can not get lower in angle
(which I think will help the football game shots) we can not get infinite
resolution with our cameras.
If you found youself longing for more reach with the 70-200 2.8 II (gee, do
I wish I have that lens or what :). I d recommend invest in a 1.4x extender.
works great on version I and the f4. I d hope only better on the II. It
does not hurt the imag... 阅读全帖
t****g
发帖数: 35582
14
来自主题: PhotoGear版 - I want resume template from linkedin...
你用的那个版?
我觉得solidworks2009没有inventor2010好用。2D sketch可用的constraint太少。
比如我记得把一个矩形的中心放到原点,还得花两条对角线辅助线,然后把交点
constraint到原点上。
A*******y
发帖数: 1610
15
【 以下文字转载自 NextGeneration 讨论区 】
发信人: summercat (夏天的懒猫), 信区: NextGeneration
标 题: update 【紧急投票】改写亚裔孩子要比非裔SAT高450分才能入名
发信站: BBS 未名空间站 (Tue Feb 28 14:01:24 2012, 美东)
这个提案起源于一白学生被一高校因种族的原因拒绝了,这白学生正在告学校,然后有亚裔趁机组织发起这个调查,希望能引起重视,改变这个不合理的条例。请大家要同心协力,争取亚裔的权利!
请您立即投票赞成(FOR) 80-20全美亚裔教育基金会的民调书
请置顶,请在以下网页签名,请转发!
http://admin.80-20nj.info/cgi/80/e?l=8/11e/f&w=no
如果这个链接暂时打不开,请稍后再试,有可能是网络traffic的问题。
发信人: alderbrook (Alderbrook), 信区: Parenting
标 题: 【紧急投票】改写亚裔孩子要比非裔SAT高450分才能入名校的现实
发信站: BBS 未名空间站 (Tue Feb 28 01:... 阅读全帖
b*****e
发帖数: 14299
16
【 以下文字转载自 PDA 讨论区 】
发信人: zher (民工.铜豌豆), 信区: PDA
标 题: 【请置顶 紧急投票】改写亚裔孩子要比非裔SAT高450分才能入名校br />
发信站: BBS 未名空间站 (Thu Mar 1 14:21:07 2012, 美东)
发信人: alderbrook (Alderbrook), 信区: Parenting
标 题: 【请置顶 紧急投票】改写亚裔孩子要比非裔SAT高450分才能入名校的现实
发信站: BBS 未名空间站 (Tue Feb 28 01:38:53 2012, 美东)
【紧急投票动员】改写亚裔孩子要比非裔SAT高450分才能入名校的现实
决战最高法院, 请投庄严一票,来捍卫你孩子公平竞争入学名校的机会
请置顶,请在以下网页签名,请转发!
http://admin.80-20nj.info/cgi/80/e?l=8/11e/f&w=no
-----------------
历史性的时刻已经到来了:2/21/2012,美国最高法院决定审理用“族裔”的理由来提
高亚裔和白人高校入学门槛的做法是否违宪。您--关爱孩子未来的父... 阅读全帖
m********l
发帖数: 4394
17
这个问题有啥好讨论的?
基因给人一些Constraints, 比如一个头, 两只眼, 两个手, 两个到三个腿.
然后你决定怎么在这些constraint requirements里运行.
基因不决定你怎么远行
t***s
发帖数: 300
18
【 以下文字转载自 Parenting 讨论区 】
发信人: alderbrook (Alderbrook), 信区: Parenting
标 题: 【请置顶 紧急投票】改写亚裔孩子要比非裔SAT高450分才能入名校的现实
发信站: BBS 未名空间站 (Tue Feb 28 01:38:53 2012, 美东)
【紧急投票动员】改写亚裔孩子要比非裔SAT高450分才能入名校的现实
决战最高法院, 请投庄严一票,来捍卫你孩子公平竞争入学名校的机会
请置顶,请在以下网页签名,请转发!
http://admin.80-20nj.info/cgi/80/e?l=8/11e/f&w=no
-----------------
历史性的时刻已经到来了:2/21/2012,美国最高法院决定审理用“族裔”的理由来提
高亚裔和白人高校入学门槛的做法是否违宪。您--关爱孩子未来的父母--现在就可以花
一分钟时间来帮助孩子增大孩子上他们理想大学的机会。请您立即投票赞成(FOR) 80
-20全美亚裔教育基金会的民调书,清楚明白地表明亚裔在这件案子上的立场。
资料显示,亚裔在美国要比其他族裔成绩优秀许多才能... 阅读全帖
a***8
发帖数: 2433
19
【 以下文字转载自 Military 讨论区 】
发信人: acc28 (天下武功,唯快不破!), 信区: Military
标 题: zz. 紧急动员:决战最高法院, 请投庄严一票
发信站: BBS 未名空间站 (Fri Mar 2 15:43:32 2012, 美东)
http://admin.80-20nj.info/cgi/80/e?l=8/11e/f&w=no
紧急动员:决战最高法院, 请投庄严一票
捍卫你孩子公平竞争入学名校的机会
历史性的时刻已经到来了:2/21/2012, 美国最高法院决定审理用"族裔" 的理由来提
高亚裔和白人高校入学门槛的做法是否违宪。您--关爱
孩子未来的父母--现在就可以花一分钟时间来帮助孩子增大孩子上 他们理想大学的机
会。请您立即投票赞成(FOR) 80-20全
美亚裔教育基金会的民调书, 清楚明白地表明亚裔在这件案子上的立场。
http://admin.80-20nj.info/cgi/ 80/e?l=8/11e/f&w=no
资料显示, 亚裔在美国要比其他族裔成绩优秀许多才能上同样的学校。 要上同样的名
校,亚裔SAT要考1550分,... 阅读全帖
f*********r
发帖数: 85
20
来自主题: WaterWorld版 - 一道年薪40万的面试题,大家看看
就是个CSP问题,两人各知道一半constraint
然后每个人说的话相当于是additional constraint
l**********t
发帖数: 5754
21

真心问:
is your decision influenced by anything, and if so, what are these things.
Do you feel completely free to make any decisions/do whatever you like
without constraints?
Of course you can "freely choose" to comply with certain norms or
constraints.
a*****y
发帖数: 33185
22
【 以下文字转载自 WisdomII 俱乐部 】
发信人: arthury (非正常人类研究中心主任), 信区: WisdomII
标 题: 对荀子“礼制”思想的经济分析
发信站: BBS 未名空间站 (Sun Feb 13 02:23:47 2011, 美东)
叶行昆
内容提要:春秋、战国之际为中国古代社会的一个极为重要的制度转型期,诸子百
家均为未来社会新的制度安排纷纷提出了各自的理论体系;其中荀子创设的“礼制”思
想可谓不同凡响,“从经济思想上看,荀况不仅集了儒家的大成,而且也集了先秦各家
的大成。他是我国第一个从总体上对封建经济制度进行了理论分析的思想家。”荀子所
设计的“礼制”思想,为后来的大一统的封建帝国的经济制度与经济政策的制定,提供
了理论依据,其影响十分深远。笔者以为,荀子的“礼制”思想既是“荀学”的核心,
又是其经济思想的基石,更是具有中国传统特色的制度思想。
关键词:荀子、 “礼制”思想、 制度安排
春秋、战国之际是中国古代社会的一个重要转型期,即是封建领主制瓦解和封建地
主制确立的时期,是由诸侯割据称雄过渡到中央集权统一的时期。西周社会... 阅读全帖
s*******1
发帖数: 191
23
来自主题: Wisdom版 - 您有愿心吗?
2012-11-02晚上Osifu開示
Osifu經常說一句話“該說的都已經說了,但心裏還是想給大家說些什麼。”
Osifu有太多太多的心聲要宣流給大家,Osifu明白自己的心,無非是反復地講同樣的內
容。
Osifu有時也笑自己,Osifu為人惜字如金,可是一旦給大家開示,即使給一個人開示都
會滔滔不絕,有說不完的話。
心呀!殷切咐囑。
心呀!苦口婆心。
心呀!不知疲憊。
心呀!懇切迫切。
有時,Osifu也會和自己的心靈對話。
Osifu理解自己的心,Osifu的心只有一件事要做--造福蒼生,普濟億靈。
Osifu的心釋放出強大的驅動力、推動力、加持力使Osifu把所有的時間、精力都放在造
福蒼生普濟億靈上。
Osifu無法做到不想這件事情、不做這件事情。心的力量太強大了!
宇宙間最強大的力量就是心的力量!這是Osifu親修實證來的智慧之一。
Osifu甚至可以進一步講,心的力量主宰一切。
Osifu的心主宰Osifu的命運,Osifu的心主宰Osifu的一切。
Osifu相信自己的心,Osifu是一個活在心靈中的人。
Osifu的心是Osifu的師父。
OsiOsifu的心是Os... 阅读全帖
m******y
发帖数: 25
24
来自主题: CS版 - 如何在latex下写pseudocode?
Use alltt and \ensuremath when you want to include math symbols, e.g.,
\begin{alltt}
\textbf{boolean} func(\textbf{Constraint} C1, \textbf{Constraint} C2) \{
\textbf{return} checkValidity(\ensuremath{\tau});
\}
\end{alltt}
D*******a
发帖数: 3688
25
constraint or non-constraint?
convex or non-convex?
w*********a
发帖数: 9279
26
我具体说一下。
一个变量 X=[q1; q2; q3; dot(q1); dot(q2); dot(q3)] dot(*)是*的导数. 这个
变量表示一个系统的位置和速度
有n个constraints, 每个constraint表示为:
G_i(X,dot(X))=0; i=1...n;
此外还有一些不等式约束:
K_j(X,dot(X))>=0; j=1...m;
各种约束的都是非线性的,是 位置,速度和加速度 共同参与的约束。
对于一个目标函数 u=F(X0,X1,U,t) X0,X1是边界条件, U是个未知函数, t是时间。
对于这样一个优化问题, 能不能求 min(u)?

convex
zh
发帖数: 76
27
You must drop the FK constraint first by
ALTER TABLE table_name
DROP CONSTRAINT constraint_name
B*****n
发帖数: 135
28
In this case, you dont even need a trigger. It is
automatically
handled by database referential constraints. Basically you
need
to specify the DELETE CASCADE constraint when creating table
A
that has a forien key referencing table B.
here is an example:
suppose you have the table B which has deptno as a primary
key:
SQL> select * from B;
DEPTNO DNAME LOC
ET
发帖数: 10701
29
来自主题: Database版 - what's wrong with this table sql syntax?
CREATE TABLE model_by_res (
res_id SMALLINT UNSIGNED NOT NULL,
model_id TINYINT UNSIGNED NOT NULL,
PRIMARY KEY (res_id, model_id),
CONSTRAINT fk_model_by_res_res FOREIGN KEY (res_id) REFERENCES resistor (
res_id) ON DELETE RESTRICT ON UPDATE CASCADE,
CONSTRAINT fk_model_by_res_model FOREIGN KEY (model_id) REFERENCES res_
model (model_id) ON DELETE RESTRICT ON UPDATE CASCADE
)ENGINE=InnoDB DEFAULT CHARSET=utf8;
dont' know why yah?
z***y
发帖数: 7151
30
When you alter clustered index, all non-clustered indexes will repointed to
new clustered index. Also since we only alter clustered index database
engine will not spend time inventory the existing constraints--they will be
left untouched.
However, when you drop the clustered index, all indexes(clustered and non
clustered) are gone. All constraints will be modified/removed.
Actually my first statement is not 100% correct I just realized... it is
true that non clustered indexes will not be dropped
m******t
发帖数: 2416
31
来自主题: Java版 - [转载] Re: java thread problem

no, you missed my point - in the real world, a solution makes the most
sense to the given requirements *is* the perfect solution.
remember the time/cost constraints are also part of the requirements.
(even in software development you cannot avoid these constraints)
r***r
发帖数: 181
32
来自主题: Java版 - Entity Bean question
using CMP , there are two Entity beans , E1 and E2 .
E1 has a foreign key reference to E2.
when calling E1.remove() , got an ejb exception , saying " can not updat
e Table 1 to NULL, because Table 1 set "NOT NULL" constraints.
How to fix that ? I do not want to remove any constraints from the schem
a.
THx
a*****e
发帖数: 176
33
来自主题: Programming版 - How can matlab loop over functions
I am using the function fmincon. I need to supply a constraint function.
I have a bunch of constraint function to test. How can I make a loop over
these function?
I know how to loop over numbers, but do not know how to loop over function.
Thanks very much.
t**********s
发帖数: 930
34
来自主题: Programming版 - 一个有向图问题
问题是这样的:
Describe a mathematical model for the following scheduling problem.
Given tasks T1, T2,…, Tn, which require times t1, t2,…,tn to complete, and
a set of constraints, each of form “Ti must be completed prior to the
start of Tj,” find the minimum time necessary to complete all tasks.
我觉得这是个有向图问题。任务是图的顶点,花费时间是边的权,constraints 就是边
的方向。再往下,就找不到线索了。谁能提示我一下?
谢谢
s******n
发帖数: 876
35
来自主题: Programming版 - 一个C#似疑模板问题
C++ template整个一宏替换, 跟C# generics比较不公平.
语言能够表达某种constraint, 是feature, 不一定是flaw.
程序员希望能写出这个constraint, 希望compiler/runtime能够替他检查,
希望能够帮助IDE更好地理解他的意图, 希望其他程序员能读懂他要干什么.
不能因为一个弱的type system看起来简单, 就认为用起来简单.
t****t
发帖数: 6806
36
来自主题: Programming版 - 一个C#似疑模板问题
C++9X的template是有点象宏替换, 虽然其实真正的C++模板库不是这样用的(会手动写
出constraint). C++0X的template constraint (concept)就看上去好得多.
H***a
发帖数: 735
37
题目本身是一个标准quadratic programming with linear constraints问题。
需要 maximize: f(x) = r'*x - a*x'*V*x
subject to constraints:
(1) sum(x_i) = e'x = 1, e代表向量(1,1,1..)
(2) 0 <= x_i <=1
现在使用Matlab的quadprog函数如下。
**********************************************************************
clear all;
r = [0.0667; 0.0900; 0.0717; 0.0733];
V = [0.00019 0.00065 0.00004 0.00038;
0.00065 0.00883 0.00218 0.00327;
0.00004 0.00218 0.00125 0.00063;
0.00038 0.00327 0.00063 0.00162];
e = ones(len
l*********s
发帖数: 5409
38
来自主题: Programming版 - 水母那个大坑太搞笑了
"Well, simple common sense is going to limit Python's applicability
when operating at Google's scale: it's not as fast as Java or C++,
threading sucks, memory usage is higher, etc. One of the design
constraints we face when designing any new system is, "what happens
when the load goes up by 10x or 100x? What happens if the whole planet
thinks your new service is awesome?" Any technology that makes
satisfying that constraint harder -- and I think Python falls into
this category -- *should* be dis... 阅读全帖
p**********e
发帖数: 316
39
想抛砖引玉,讨论一个话题
本人当码工也很久了,还在最底层,自己先鄙视一下先
本人完成任务时稍有点洁癖,方方面面基本都考虑到,所以bugs一般很少很少,然而在
一般的公司里,是没有所谓的按performance来review的,时间长了,因为你做的东西
不声不响,在很多人眼里你就是一个有亦无了, 想请教本版的前辈和晚辈,如何作合
理的控制能够产生一下bugs,又不过分。我想到的一些方面:
1) 不要指出BA的缺陷,要求什么做什么, 程序里面适当考虑到这些,留有余地, 这
样子来来往往就多了些
2) 很多能够出小错的地方不处理,比如一个data field, 如果不允许有null, 那么
加一个not null的constraint 就可以避免这类问题(或者问题发生了,马上就能知道
, 也不算什么问题了), 那么就有意的不设置这个constraint,出了问题,看看是
data的问题,就告诉user是data的问题,这样子来讲,问题解决了,又赚到了credits.
..
请不要问我怎么做到少产生bugs,我感觉是害人害己。 有多少程序是rocket science,
如果计算出一点错误,r... 阅读全帖
L******e
发帖数: 15
40
来自主题: Accounting版 - Employ American Workers Act on H-1B
A question regarding bank jobs. It seems that some banks are under the
Employ American Workers Act constraint for sponsorship if they received
funds from Troubled Asset Relief Program (“TARP”). However, the constraint
will be lifted after 2/17/2011.
Could anyone give any hint on this regulation? Does it mean that the
employer can provide sponsorship after 2/17/2011
t**f
发帖数: 536
41
我太笨了,请大家帮忙啦
最近在写一个proposal,study DNA structure。是我们的qualify exam。
老板让我研究一个DNA sequence 的structure
我们用NMR得到distance constraints and dihedral angle constraints。
然后用XPLOR-NIH去calculate the structure
可是我从来没用过XPLOR,我试着读manul啥的,看不懂啊
有没有牛人给解释一下大概的原理,我知道的就是用molecular dynamics 去
minimize energy
但是怎么工作的啊,如果有大牛能指点一下,不胜感激啊。。。
a*******o
发帖数: 129
42
来自主题: Computation版 - [转载] lineariation problem....help, please
Thank you very much.
I also have other constraints which x and y are linearized in them.
If I do log(x) and log(y), it would violate linearization of other
constraints.
I am sorry. I forgot to put on all the conditions.
Are there a way to use two or three inequalities to substitute this equality?
For example,
x*y=3.
Can I use like the following form to substitute it?
x+y>=C1
x-y<=C2...
x and y are continuous variable.
Thanks....I am not familiar with this kind of stuffs.
H***a
发帖数: 735
43
【 以下文字转载自 Programming 讨论区 】
发信人: Hyena (阿盆), 信区: Programming
标 题: 一个quadratic programming的问题,请指教!
发信站: BBS 未名空间站 (Fri Aug 21 18:53:05 2009, 美东)
题目本身是一个标准quadratic programming with linear constraints问题。
需要 maximize: f(x) = r'*x - a*x'*V*x
subject to constraints:
(1) sum(x_i) = e'x = 1, e代表向量(1,1,1..)
(2) 0 <= x_i <=1
现在使用Matlab的quadprog函数如下。
**********************************************************************
clear all;
r = [0.0667; 0.0900; 0.0717; 0.0733];
V = [0.00019 0.00065
a****f
发帖数: 944
44
来自主题: Computation版 - optimization using matlab function fmincon
When you do energy minimization problems, do you use built-in matlab
function or write your own gradient descent method ( or other methods)?
I use matlab function fmincon for a constrained optimization problem, but
the parameters don't change at all after optimization, except those that did
not satisfy the constraints are changed to meet the constraints.
Does anyone know the reason?
f***e
发帖数: 43
45
来自主题: Computation版 - c++ optimization lib 求推荐
一个目标函数,有10来个参数。求最值的那种。。。
函数应该比较规则,没有奇点,不过gradient如果需要得numerical,
关键在于10来个,numerical graident也蛮麻烦。
参数有些范围的constraint,
可能还有些别的nonlinear constraint
m*****y
发帖数: 67
46
When the transaction fee is too high, then purely using market to adjust the
balance between the demand and the supply in such a complicated network does
not seem to be a good choice. The price can give different bids different
dispatch priorities, but from the security and reliability perspective, high
cost units will be called in by the constraints. The redispatch acoording to
these constraints is a very involved process rather than just finding an
intersection between the demand curve and t
s***e
发帖数: 830
47
来自主题: Economics版 - asking for a paper, 3x
Could anybody send me a copy of the following paper at m*****[email protected],
thanks a lot!
"Pontryagin's principle for problems with isoperimetric constraints and for
problems with inequality terminal constraints," Journal of Optimization
Theory and Applications. Volume 18, Number 4 / April, 1976.
kx
发帖数: 16384
48
☆─────────────────────────────────────☆
Gaojun (Gaojun) 于 (Mon Nov 14 12:04:02 2011, 美东) 提到:
Between trust and control: Developing confidence in partner cooperation in
alliancescuny.edu 中的 [PDF]…, BS Teng - Academy of management Review, 1998
- JSTOR
Strategic alliances have been recognized as arenas with potential for
opportunistic behavior
by partners. Hence, a firm needs to have an adequate level of confidence in
its partner's
cooperative behavior. In this article we examine the notion of... 阅读全帖
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