l*****a
发帖数: 38403 | 1 Thomas Jefferson, (1743-1826) 3rd American president, author, scientist,
architect, educator, and diplomat. Deist, avid separationist.
"Millions of innocent men, women, and children, since the introduction of
Christianity, have been burned, tortured, fined, and imprisoned, yet we have
not advanced one inch toward uniformity. What has been the effect of
coercion? To make one half of the world fools and the other half hypocrites.
" [Notes on Virginia]
"I do not find in orthodox Christianity one re... 阅读全帖 |
|
s**u
发帖数: 9035 | 2 A Gaithersburg father and son reaped the benefits of $2.27 million in stock
market profits during the past five years, buying a condominium and two cars
and paying travel bills, loans and taxes, according to the FBI.
The U.S. government submitted a request March 28 that would require Cheng Yi
Liang, 57, and his son Andrew Liang, 25, to forfeit the condo and their
family home and served a warrant March 29 for nine bank accounts tied to the
stock market accounts, Alisa Finelli, a spokeswoman for t... 阅读全帖 |
|
t******n
发帖数: 122 | 3 i always delete such email immediately if they're not blocked.
FYI - a useful tech article:
http://spaces.msn.com/members/zjr72/Blog/cns!1p-SQdO241G9F9Expq006pyg!380.entry
June 18
谈论URL伪装
在文章模糊的URL中，提供了各种URL地址的表示法，其实这就是常见的URL地址伪装的方法。一般而言，一个标准的URL地址格式[RFC1738,RFC1738中文]应该是这样的：
schemes://:@:/
前面的schemes可以包括如下协议：
ftp File Transfer protocol
http Hypertext Transfer Protocol
gopher The Gopher protocol
|
|
s**u
发帖数: 9035 | 4 A Gaithersburg father and son reaped the benefits of $2.27 million in stock
market profits during the past five years, buying a condominium and two cars
and paying travel bills, loans and taxes, according to the FBI.
The U.S. government submitted a request March 28 that would require Cheng Yi
Liang, 57, and his son Andrew Liang, 25, to forfeit the condo and their
family home and served a warrant March 29 for nine bank accounts tied to the
stock market accounts, Alisa Finelli, a spokeswoman for t... 阅读全帖 |
|
s*******y
发帖数: 46535 | 5 中文叫老鼠会
英文叫pyramid scheme或者ponzi scheme |
|
m*******l
发帖数: 12782 | 6 【 以下文字转载自 Programming 讨论区 】
发信人: Eloihim (真神), 信区: Programming
标 题: 這版的碼工每一個都弱爆了
发信站: BBS 未名空间站 (Wed Jan 16 09:54:54 2013, 美东)
看看強者怎麼做的。
http://www.theregister.co.uk/2013/01/16/developer_oursources_jo
Security audit finds dev OUTSOURCED his JOB to China to goof off at work
Cunning scheme netted him 'best in company' awards
By Iain Thomson in San Francisco • Get more from this author
Posted in Business, 16th January 2013 01:29 GMT
A security audit of a US critical infrastructure company... 阅读全帖 |
|
m*****r
发帖数: 4 | 7 hea, there, I am not majoring in database but encounter some problems related.
Hope to ask and receive some feedback. Thanks.
Suppose that a database can accormodate N records. Now, when the database is
full and a new record is coming. Then, how to add this new record into the
database.
I know one scheme. Firstly, delete the old record with the longest time
duration in the database. And then, add the new record into the database.
1. I wonder whether there are other schemes to deal with such cond |
|
l***h
发帖数: 392 | 8 装是装上了 ，不过好像只能在basic scheme里面用啊，一改scheme就不能用了。
要加补丁么？ |
|
a***e
发帖数: 27968 | 9 5小时不算短了，丫i5测试明白说用150nit和saver scheme可以到5~6小时
i7那个测试估计就是丫搞成performance scheme了，
就像那个Z930的低分
所以目前看，这俩电池其实差不多，看看load的时间其实是差不多
你说的，就是接口合理，剩下不少成见
thinkpad？ |
|
v****0
发帖数: 1887 | 10 疯狂的人啥时候都有
投资郁金香 投资south sea company 大萧条前GM 总裁大肆投资股市
当然也有疯狂的成功
不过比特币就是一 text book of Ponzi scheme
当然 Ponzi scheme 过程中不排除某些人还是能赚钱的 |
|
L***n
发帖数: 6727 | 11 bash 很ugly阿，scheme很expressive，很elegent, 写长一点的script还是scheme好，
只写几行的bash 不错 |
|
m**********w
发帖数: 4161 | 12 看上去是vncserver用的桌面scheme和Ubuntu自带的remote desktop用的scheme不一样
。这个应该就是设置问题，很好改吧。
跟分辨率没什么关系了。 |
|
r*********r
发帖数: 3195 | 13 小孩子学东西不用那么功利性的话，学个 functional PL 比较益智。
麻省那帮人热衷教小孩 scheme 还是有道理的。不过 scheme 的 syntax
太难懂，换成 ml, haskell 什么的就更好。 |
|
E*****m
发帖数: 25615 | 14 看看強者怎麼做的。
http://www.theregister.co.uk/2013/01/16/developer_oursources_jo
Security audit finds dev OUTSOURCED his JOB to China to goof off at work
Cunning scheme netted him 'best in company' awards
By Iain Thomson in San Francisco • Get more from this author
Posted in Business, 16th January 2013 01:29 GMT
A security audit of a US critical infrastructure company last year revealed
that its star developer had outsourced his own job to a Chinese
subcontractor and was spending all his work ... 阅读全帖 |
|
L***n
发帖数: 6727 | 15 来自主题: Programming版 - 王垠忏悔录 我试着解释一下，我也不是CS的，如有不对请内行指正
1. CPS: a style of programming in functional programming, which is way cool
for the sake of bla, bla, bla...
2. Friedman gave an extra credit homework problem one day to Yin Wang(as
well as other guys in his class), "请写出一个叫 CPSer 的程序，它的作用是
自动的把 Scheme 程序转换成 CPS 形式"
3. Yin Wang did the problem in a week, "最后我用它生成了所有其它的答案，
产生的 CPS 代码跟手工转换出来的看不出任何区别"
4. Yin told Friedman one day he did the job. According to Yin's account,
Friedman was surprised and handed him later... 阅读全帖 |
|
t****a
发帖数: 1212 | 16 刚查了一下这位牛人，他在Friedman，也就是王银曾师从的大牛，scheme的作者手下做
postdoc。和Friedman合著The reasoned scheme。
今天Clojure/West下午的主题多和core.logic有关。我没用过，不过看起来和cascalog
语法有些相似。看起来很像类SQL的查询语言，但是要更加灵活。今天下午的talk中有
个做fraud detection的公司似乎在用这个做data mining。
教主的Datomic好像是值得看的东西。似乎已经把多种数据源比如sql数据库，amazon
dynamo db等接口抽象好了。
这里有懂Datomic的同学能给个介绍吗？ |
|
n****1
发帖数: 1136 | 17 记得scheme里面的encapsulation是用closure实现的， 就是我上面贴的代码。
clojure不熟
scala虽然有mutable, 但我记得它是强烈鼓励使用immutable的， 让coder意识到
referential transparent的重要性，从而减低mutable的影响面积。 从这个角度上来
说， scala是个好的开始。
scheme也有mutable, 但SICP里面可没少强调setq的危害。
但java/python/ruby/js这些基本没有这个概念， mutable state像空气一样充斥着每
一个角落， 所以到了需要高并发时就傻逼了， 就得看scala/clojure了。 |
|
h*i
发帖数: 3446 | 18 不是大牛，我学Clojure以前没有接触过任何LISP。所以不懂scheme, 据我听说，
Clojure不是很纯粹的LISP, 除了list之外，还引入了其他核心数据结构，map, vector
, set，就是{}, [], #{}, 不像其他LISP只用()，所以把数据弄来弄去的倒腾很容易，
很直观；没有reader macro, 社区也不鼓励用macro, macro主要是高手们用来作轮子用
的，一般应用程序猿基本不用宏，所以有些LISP程序员不喜欢Clojure。不过Clojure的
用户也不是他们，而是我们这种本来用Java的人。
其他的，主要就是Clojure的数据缺省是强制性immutable的，没有变量的存在，scheme
应该不是这样的。这样的话，一般程序员学Clojure一开始，可能会觉得自己都不会编
程了，因为不能用for loop啥的。Clojure的for是list comprehension， 和for loop
完全不同， Clojure的loop recur倒是有点像for loop, 不过也是被皱眉头的。
当然Clojure用熟了，核心的那些map,... 阅读全帖 |
|
a********5
发帖数: 1631 | 19 我知道有些人至今仍然嘲笑和鄙视我，因为我曾经说过，我在Dan Friedman的两门课程
B521（程序语言理论)和B621（高级程序语言理论）都得了A+。只要提到我，他们就会
拿出这个把柄来，好像我是一个只在乎分数的肤浅的人。实际上我觉得这些人只是为了
鄙视而鄙视，所以他们发现貌似一个把柄，也不搞清楚Dan Friedman是谁，也不搞清楚
这个A+的分量，拿着半截就开跑，抓住不放了。所以即使我没提过这分数的事情，他们
一样会找到其它话题来损我。我一直都懒得回应这些人的言论，不过今天我有兴致显示
一下自己的价值，所以想花点时间告诉你，这个A+到底意味着什么。
从我的人生历史里面，你应该很明显的看出来，课程，考试，分数，名校，权威，事业
，成就，贡献，以至于图灵奖，诺贝尔奖，对于我来说真的什么都不是。你觉得一个在
乎这些东西的人，会以优秀的成绩从清华，Cornell，Indiana三所大学退学吗？在漫长
的学术生涯中，我上过许多的课程，很多最后结果都是A或者A+，也有几门课的分数低
到C。因为我从来不觉得任何人有资格出题来考我，所以自上大学以来，我给自己定的
标准就是“及格万岁”。我是... 阅读全帖 |
|
h*i
发帖数: 3446 | 20 王yin就没做过什么大的应用项目，不知道作应用项目的痛点在什么地方。Rich Hickey
虽然没有CS学位，但人家作了几十年应用程序员，人又爱学习爱琢磨，在Clojure设计
上做的选择都是深思熟虑过的，做的talk也让很多在战壕里滚打的程序员觉得说到点子
上了，我觉得被一些人追捧很正常。我和Rich Hickey在Clojure/west会议上一个桌子
吃过饭，我觉得他为人是很低调的，完全不是王yin喷的自以为是的那种。王yin一个搞
语言出身的，看不惯野路子出身的，有些酸葡萄，其实很正常。不过他的印第安纳的导
师完全不同，人家对Clojure就很尊重。可见是半瓶水，响叮当。
Scheme和Clojure差距挺大的，Clojure的immutable vectors []和maps {}让整个编程
风格与其它的LISP完全不同了，所以很多lisper都拒不承认Clojure是一种Lisp，这也
不奇怪。
不过我觉得王yin就没用过Clojure，可能连一行Clojure都没写过，更别说做过项目了
，所以喷不出啥技术含量的东西。他说的啥lazy, STM这些，根本不是Clojure最... 阅读全帖 |
|
h*i
发帖数: 3446 | 21 作为第一门语言，还是scheme这种比较好，可以学到正确的路子，不走弯路。老一辈的
美国CS学生都是这么教出来的，他们创造了大部分现在的技术。
现在还有学校这么教的。比如伯克利。
我今年夏天招了三个实习生，都是伯克利大三本科女生，来之前都没听说过Clojure。
来了，从我给她们看她们所见到的第一行Clojure代码，到她们每个人都做完全部的
clojurescript koan题，只花了4个小时。第二天我就给她们看我们的生产代码，第三
天就正式干活了。现在三个月结束，她们完成了一个完整的产品，从美工设计，变成
HTML模版，再变成Clojurescript代码，到服务器端的Clojure代码，datomic数据库
schema设计到编码，都是她们自己干的，我只是告诉她们她们下一步做什么和问题答疑
。现在产品上线了。
这些小朋友，就上过几门CS的课，连软件工程，数据库的课都还没上过呢。要不是她们
的第一门语言是scheme,做到这些是不可能的。
玩. |
|
h*i
发帖数: 3446 | 22 我不懂scheme。我只懂Clojure。当时面试这些小朋友的时候（我面试了60个人），她
们都是写python的。来了我开讲Clojure，她们才告诉我她们第一门语言是scheme，然
后她们就飞快的做完了clojurescript koans，我就惊呆了，然后就决定让她们写生产
代码了。哈哈。 |
|
a****a
发帖数: 5763 | 23 我个人认为， 一门好的语言， 第一要语法简单， 第二要接近自然语言
python R 这种的语言 syntax 设计，我认为设计师脑子里是有水的
个人目前觉得最合适的还是 Scheme, 问题是标准化没有， 缺库， 不过已经比其他的
语言强一大截了
macro这种东西，在语言里是有害无益的，宏完全可以用function代替，common lisp的
问题就在于macro 泛滥
很多语言脑残就脑残在程序员懒得多打几个字符， 比如python的 def, c里的i++
python的强制锁进是我认为最脑残的行为之一， 程序必须能用任何编辑工具修改
scheme 和 java 目前来看就是语言设计中最好的，剩下的各有各的脑残 |
|
发帖数: 1 | 24 ....
建议想了解functional programming 去读一下 sicp
复杂数据结构根本不是啥事 用 scheme不需要多少行就可以让scheme支持oo
我发觉这个版很多人对 fp的了解不如好大学的大二学生
list, |
|
w*******o
发帖数: 32 | 25
3DES is not vulnerable to these academia attacks.
These RSA people don't know Shannon's pure cipher system,
where EDE equals to E (E: encryption, D:decryption).
So-called double encryption and double key problem are not
justifiable in theory, as Shannon's pure cipher theory implied,
but these RSA people (including Ron Rivest) don't read Shannon's
result, and invent a set of vulnerable schemes, then attack
the vulnerable schemes to attract attention.
This is really amazing. |
|
y****e
发帖数: 1012 | 26 请问大家用这个模板和这个tex source code，为啥Abstract的前两句话换行有问题呢？
我包含了\usepackage{hyphenat}
为啥and/or没有被断开，
还有hypennated word比如utilization-based没有正确断开呢？
tex 代码
\documentclass{acm_proc_article-sp}
\usepackage{hyphenat}
\begin{document}
\title{Sample }
\author{}
\maketitle
\begin{abstract}
Classic caching algorithms leverage recency, frequency, and/or other
properties of the cached objects at per-object granularity.
For example, a separate
recency tracking and a space utilization-based container eviction scheme
a... 阅读全帖 |
|
s**u
发帖数: 9035 | 27 A Gaithersburg father and son reaped the benefits of $2.27 million in stock
market profits during the past five years, buying a condominium and two cars
and paying travel bills, loans and taxes, according to the FBI.
The U.S. government submitted a request March 28 that would require Cheng Yi
Liang, 57, and his son Andrew Liang, 25, to forfeit the condo and their
family home and served a warrant March 29 for nine bank accounts tied to the
stock market accounts, Alisa Finelli, a spokeswoman for t... 阅读全帖 |
|
n*****g
发帖数: 4117 | 28 ☆─────────────────────────────────────☆
dena (dean) 于 (Mon May 4 20:28:54 2009) 提到:
我现在用ChemDraw6.0画了一个Synthesis Scheme。请问怎么让它在Word 2007里面转90
度。我之前是将文件在Chem Draw里面存为图片格式。图片在Word文件里就很好转动。
但是发现打印出来的Scheme比较暗.请问大家是怎么处理的，谢谢。
☆─────────────────────────────────────☆
skycaptain08 (太尉) 于 (Tue May 5 01:52:25 2009) 提到:
这个只能俺手把手教你
90
☆─────────────────────────────────────☆
yugon (扫地大婶) 于 (Tue May 5 09:45:29 2009) 提到:
选中目标，ctrlR，90度（注意方向）
90
☆─────────────────────────────────────☆
dena |
|
s**u
发帖数: 9035 | 29 A Gaithersburg father and son reaped the benefits of $2.27 million in stock
market profits during the past five years, buying a condominium and two cars
and paying travel bills, loans and taxes, according to the FBI.
The U.S. government submitted a request March 28 that would require Cheng Yi
Liang, 57, and his son Andrew Liang, 25, to forfeit the condo and their
family home and served a warrant March 29 for nine bank accounts tied to the
stock market accounts, Alisa Finelli, a spokeswoman for t... 阅读全帖 |
|
F****I
发帖数: 270 | 30 首先，定义就是定义，只要是自洽的，只有接受不接受，是不是行业普遍接受的。
#9 算符的local与否，这里的local按Parr&Yang (2.1.24)的定义，和L(S)DA/GGA无关
。LDA的定义是
E_{xc}^{LDA}[\rho]=\int \rho(r) \varepsilon(\rho) dr (Parr&Yang的7.4.1)
包括后续的GGA,(8.7.1)等，在数学上很容易验证他们对应的算符都是local的，因为
LDA/GGA的泛函形式不存在HF里交换算符的情况。
然后，是Kohn-Sham方案的定义:
按Parr&Yang p146, v_eff(r) is a local operator in the sense of (2.1.24).
这个问题来自于，如果一个人从头到尾完整推导Kohn-Sham scheme（暂时不考虑non-
interacting v-representability), 对应的potential operator只能是local的。
我没有引进对KS scheme推广和修正的定义。我做的判断是,B3LYP等hydrid fu... 阅读全帖 |
|
C*S
发帖数: 1658 | 31 【 以下文字转载自 Faculty 讨论区 】
发信人: SFJ0913 (SFJ0913), 信区: Faculty
标 题: 回游的海归：NSF官员的腐败例 (转载)
发信站: BBS 未名空间站 (Thu Aug 23 08:47:09 2012, 美东)
发信人: markbench (markbench), 信区: Returnee
标 题: 回游的海归：NSF官员的腐败例
发信站: BBS 未名空间站 (Wed Aug 22 13:41:05 2012, 美东)
我们这里要说的是一个美国NSF项目官员，是真人真事，是一个在中国和美国我们专业
行业比较有名气和影响的人，一个和我个人有着不少联系的人，也是早年对我回国有着
帮助的人。我之所以今天能够公开这些，主要是因为他的案件在美国司法部的网站上都
有，他本人也承认了其造假和腐败行为，并有可能在这个月(8月)底的审判中，被罚高
达25万美元的罚金和最长可达5年的监禁。具体地说，他的问题就是在2006年至2011年
间，多次伪造账单，或者是隐瞒从别人那里收到的礼物，拿着票子到受到NSF资助的大
学报账，或者是在NSF和大学重复... 阅读全帖 |
|
r****t
发帖数: 3 | 32 如果需要一种Gaussian quadrature scheme：低阶时的积分点包含于高阶的积分点中，
同时积分点的个数虽阶数的升高而增加得不快，比如以2^n的速度增加是可以接受的，
请问有没有这样的scheme? Thank you! |
|
i******m
发帖数: 10 | 33 There are countless papers about how to solve KdV equation numerically. The
FD schemes are straightforward and easy to program. I think writing your own
code can save you much more time than reading others’.
1. Finite Difference Schemes:
N. J. Zabusky and M. D. Kruskal, Phys. Rev. Lett. 15 (1965), 240
A. C. Vliegenthart, J. Eng. Math. 5 (1971), 137
I. S. Greig and J. L. Morris, J. Comput. Phys 20 (1976), 64
J. M. Sanz-Serna, J. Comput. Phys 47 (1982), 199
K. Djidjeli et al., J. Comput. Appl. Mat |
|
k*********g
发帖数: 791 | 34 "i used predictor-corrector method to decouple
velocity and pressure"
this is unprofessional statement. coz predictor corrector is a time marching
scheme, while the decoupling of velocity and pressure is a different issue
(the issue of how to fight stiffness/illness of a system), though often
involved with time scheme.
i will give answer to you question... |
|
a*****g
发帖数: 19398 | 35 By Diane Ravitch
Leonie Haimson tells the story about her discovery that the New York City
Department of Education was about to award a multi-million dollar contract
to a tech company that had been previously been involved in scandal. When
you read this account, you will understand the importance of citizen
vigilance. Who else but Leonie Haimson would lounge around on a lazy Sunday
afternoon reading the list of DOE contracts due to be voted on that week?
That is why you should contribute to her ... 阅读全帖 |
|
t*m
发帖数: 208 | 36 donot be that absolute lah, in high speed case, usually must have a good
channel, in this case, no channel code ( or less complicated code) is
acceptable for better spectrum efficiency, eg, in gsm, full rate speech
has CRC, convolution code to protect some info bits (type I_a), for
type II, no coding scheme, more obvious is in gprs CS4, no coding scheme
either. Similar thing in is2k. that is why in many situation, ppl can only get 1/2 or 1/3 data rate of what carrier
ads in wireless data comm si |
|
h***9
发帖数: 45 | 37 K. Marton (who invented the achievable scheme for broadcast channel: the
Marton's region, also the few women in this area)
Martin E. Hellman (the hellman in diffie-hellman key exchange protocol,
which is later modified to a public key encryption scheme by El-Gamal(not
related to A. El-Gamal)) |
|
h***9
发帖数: 45 | 38 K. Marton (who invented the achievable scheme for broadcast channel: the
Marton's region, also the few women in this area)
Martin E. Hellman (the hellman in diffie-hellman key exchange protocol,
which is later modified to a public key encryption scheme by El-Gamal(not
related to A. El-Gamal)) |
|
S****e
发帖数: 1063 | 39
I am probably too old and too poor to consider going back to school, hehe.
Peak current control isn't hard to understand, it's one of my favorite
control scheme due to it's simplicity, stability and excellent line
regulation. IMO it's one of the most important control scheme in power
converters, power electronic engineers should really understand how it works
. |
|
T******T
发帖数: 3066 | 40 As general note in synchronous digital design, unless clock rate is slow and
absolutely necessary, refrain from using double edged sequential logic. I
would only use it for fast <-> real slow time domain synchronization related
stuff.
DDR sounds cool, and it might seem efficient as hell to be able to
accomplish twice as much operation in only 1 single clock cycle, but when it
comes time to backend STA timing closure, you'll regret not having that
extra slack to deal with worst path circuit delay... 阅读全帖 |
|
s**g
发帖数: 66 | 41 其实他做这个已经很久啦，不知道有什么新进展。他做这个也是有渊源的，八十年代初
他在continuous time filter 方面发了不少文章，这方面的研究到上个世纪末也就差
不多了。那就要找一个相关的，于是这个ctdsp来了。可是好像跟进的人不多。
Power saving is a big advantage for similar ckt; but I feel SNR penalty is
high without anti aliasing.
I also thought it might be interesting to integrate a log amp front end into
the system to improve dynamic range and furthermore the DSP in log domain
might be really power saving - multiply becomes sum.
For SAR ADC I see more sampling/standby/sampling scheme are implem... 阅读全帖 |
|
M**********e
发帖数: 44 | 42 Hi,
I am wondering why USB 2.0 can achieve 480bps rate.
I had a look on USB 2.0 spec, there isn't any modulation scheme. There is
only scrambling (every contineous "1", insert a "0" ) and NRZI coding. Does
it mean the 480Mbps signal is transmitted directly (i.e. 1 bit occupies 2.08
ns, and this signal can be sampled by local 480MHz clock directly )?
I know there are several other methods to improve speed in USB. Such as
transmitting signal by differential, and the cable is shielded, short
distan... 阅读全帖 |
|
A*******r
发帖数: 768 | 43 最近热播大秦帝国的两个总结
强弱无定式
装b没用，得干
哈哈
生， 奥赛金牌， 因为念这本书一年多没多少进展， 过不了QUALIFY。 因此和ARTING
关系日渐恶化， 最后离开了MIT。
第一章处理VARIETY， 优点是简明扼要，缺点是材料太少，不足以给学生足够的几何直
觉， 支撑第2，3章的学习。GTM 52 的精华是第2，3章， 介绍SCHEME 和 它上面的
COHOMOLOGY THEORY。SCHEME的 |
|
w********9
发帖数: 8613 | 44
You are asking a wrong question that few can answer, and perhaps on a wrong
board. :-) I am not a 牛牛. But I am trying to help.
You don't need much to study cryptology or cryptography. It should be
covered in a chapter of a few courses in CE or CS (computer network security
, or algorithms). It is a quite narrowed field, and it is now more about
applications or practices of existing schemes. It is hard to come up with a
popularly accepted new scheme.
You can check Rivest's Algorithm book, and pl |
|
