s*********a 发帖数: 801 | 1 灵魂的进化
也和话
序
现代基督教认为人是二元化的,人是由肉体和灵魂组成的。肉体死后,灵魂不灭,要受
耶和华审判,然后,信的人,不管是杀人、放火、强奸,照上天堂;不信的,不管做了
多少好事,一律下地狱受永火烧烤。
这个概念是从人们有灵魂这个概念起,经过几千年的演变,才发展到现在的样子。要了
解灵魂的历史,我们得回到六千年前的中东。
两个古代文明
由西面的幼发拉底河(Euphrates)和东面的底格里斯河(Tigris)冲出的平原地带,
共同界定美索不达米亚(Mesopotamia,希腊文,mesos 之间, potamos 河流,即“两
河之间”)。在现代的地图,美索不达米亚相当于伊拉克大部分和伊朗的西面。苏美尔
(Sumer,公元前4000年-前2000年)和巴比伦(公元前3000年-前700年)是其中两个
著名的美索不达米亚文化。
美索不达米亚是人类有记载的最早文明发源地,他们是最早掌握耕种技术的人群之一,
他们也是最早懂得通商的人,巴比伦国王汉谟拉比(Hammurabi,公元前1792年-前
1750年在位)更是人类文明第一个使用法典的人,根据传说,汉谟拉比是从太阳神那里
得到律... 阅读全帖 |
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s*********a 发帖数: 801 | 2 灵魂的进化
也和话
序
现代基督教认为人是二元化的,人是由肉体和灵魂组成的。肉体死后,灵魂不灭,要受
耶和华审判,然后,信的人,不管是杀人、放火、强奸,照上天堂;不信的,不管做了
多少好事,一律下地狱受永火烧烤。
这个概念是从人们有灵魂这个概念起,经过几千年的演变,才发展到现在的样子。要了
解灵魂的历史,我们得回到六千年前的中东。
两个古代文明
由西面的幼发拉底河(Euphrates)和东面的底格里斯河(Tigris)冲出的平原地带,
共同界定美索不达米亚(Mesopotamia,希腊文,mesos 之间, potamos 河流,即“两
河之间”)。在现代的地图,美索不达米亚相当于伊拉克大部分和伊朗的西面。苏美尔
(Sumer,公元前4000年-前2000年)和巴比伦(公元前3000年-前700年)是其中两个
著名的美索不达米亚文化。
美索不达米亚是人类有记载的最早文明发源地,他们是最早掌握耕种技术的人群之一,
他们也是最早懂得通商的人,巴比伦国王汉谟拉比(Hammurabi,公元前1792年-前
1750年在位)更是人类文明第一个使用法典的人,根据传说,汉谟拉比是从太阳神那里
得到律... 阅读全帖 |
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s*********a 发帖数: 801 | 3 可惜这个新约时代启示的神是宙斯,不是耶和华。连基督教的祖师爷们都说白了:
用奥古斯丁自己的话:“当我读柏拉图派的书,我被他们教育我去寻求真理。”(“
But when I read those books of the Platonists I was taught by them to seek
incorporeal truth” Confessions 7. 20)
德尔图良(Tertullian)写道:“我可以用柏拉图的观点来声称‘每个灵魂是不朽的。
’”“For some things are known even by nature: the immortality of the soul,
the instance, is held by many ... I may use, therefore, the opinion of
Plato, when he declares: ‘Every soul is immortal’”The Ante-Nicene Fathers
, vol. III
革利免(Clement)在他的Stromata第6卷第8章写道:“哲学是[神... 阅读全帖 |
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s*********a 发帖数: 801 | 4 可惜这个新约时代启示的神是宙斯,不是耶和华。连基督教的祖师爷们都说白了:
用奥古斯丁自己的话:“当我读柏拉图派的书,我被他们教育我去寻求真理。”(“
But when I read those books of the Platonists I was taught by them to seek
incorporeal truth” Confessions 7. 20)
德尔图良(Tertullian)写道:“我可以用柏拉图的观点来声称‘每个灵魂是不朽的。
’”“For some things are known even by nature: the immortality of the soul,
the instance, is held by many ... I may use, therefore, the opinion of
Plato, when he declares: ‘Every soul is immortal’”The Ante-Nicene Fathers
, vol. III
革利免(Clement)在他的Stromata第6卷第8章写道:“哲学是[神... 阅读全帖 |
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h*****k 发帖数: 85 | 6 I have a fiend working there. what do you want to know? |
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w*a 发帖数: 2138 | 7 以下是版面贴过的qq群,欢迎各地老乡添加或修改:
洛杉矶江浙沪同乡QQ群:182115287
hevinye 于 Fri Jan 10 11:58:15 2014 公布
湾区浙江人QQ群:342610952
Osiris 于 Fri Jan 10 18:12:40 2014 公布
北美诸暨人qq群号:7928191
exponent 于 Mon Apr 15 14:22:06 2013 公布
嘉兴一中90级93届qq群号:36499748
fossilc 于 Sat Mar 23 16:43:00 2013 公布 |
|
w*a 发帖数: 2138 | 8 宁波人在美国 (HH20081203发布) QQ群号: 302323393
以下是版面贴过的qq群,欢迎各地老乡添加或修改:
洛杉矶江浙沪同乡QQ群:182115287
hevinye 于 Fri Jan 10 11:58:15 2014 公布
湾区浙江人QQ群:342610952
Osiris 于 Fri Jan 10 18:12:40 2014 公布
北美诸暨人qq群号:7928191
exponent 于 Mon Apr 15 14:22:06 2013 公布
嘉兴一中90级93届qq群号:36499748
fossilc 于 Sat Mar 23 16:43:00 2013 公布 |
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z*****n 发帖数: 7639 | 9 Not exactly.
for a floating point there are 3 parts: a sign (S), a exponent (E), and a
mantissa (M).
the mantissa is always fixed point, denoted as 1.xxxxxxxx.
the value of a floating point is given by
V = S M * 2^E
This means the decimal point is always controled by E to shift (float) right
or left.
But mantissa is fixed.
什么 |
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k**********g 发帖数: 989 | 10
The relationship is neatly summarized by these mnemonics:
(Var: variance. E: expectation. Not to be confused with natural exponent.)
Var[XX] = E[X^2] - E[X]^2
Var[XY] = E[X*Y] - E[X]E[Y]
Explanations.
(1) the coordinate is not flipped. (on the other hand, in convolution one
input has each coordinate flipped relative to the other input, due to
differences in their mathematical definitions in first principles)
(2) mean subtraction.
xprime = x - sum (x) / numel (x)
yprime = y - sum (y) / numel... 阅读全帖 |
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c**i 发帖数: 6973 | 11 (1) First off, I am a biologist by training. I did take physics 101 in
college, but never took quantum physics, to my eternal regret.
(2) When I prepared the original posting, I read this though I did not cite
it (but this report is the basis of my statement regrading Intel
announcement--"yesterday").
Brooke Crothers, A peek into the future of Intel processors. CNET, Oct. 19,
2010.
http://news.cnet.com/8301-13924_3-20020078-64.html
(15 nm in the lab)
(3) About your question, first let's hear wha... 阅读全帖 |
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c*****t 发帖数: 1879 | 12
110 (base 2) >> 2 = 1
6 >> 2 is the same as 6 / 4 and round down
1111 ... 1010 >> 2 = 1111 ... 1110 = -2
-6 >> 2 is the same as -6 / 4 and round down as well :)
this is signed magnitude
no such sign system.
(c) 1111 1111 1111 1111
this is 2's compliment, the standard negative number representation.
It is 1's compliment + 1.
(d) 1111 1111 1111 1110
1's complement
(e) excess #
this one is used in exponents. |
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i***h 发帖数: 12655 | 13 被鄙视鸟.
这种东西, 平时用着不出错就用了, 没深入学习过.
理解中就是把这个当memcpy使的, 看来是不对的
整数是0x24240102, 就是
(24) 0010 0100 (24) 0010 0100 (01) 0000 0001 (01) 0000 0010
浮点表示是 1 bit sign, 8 bit exponent, 23 bit significant
上面就变成:
(0) (010 0100 0) (010 0100 0000 0001 0000 0010)
呣... 还是看不出为什么最后的 0010 会变成 0000
求解释 |
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a*****g 发帖数: 19398 | 14 #!/usr/bin/env pike
// legal.pike - Count the number of legal go boards.
// Copyright 2005 by Gunnar Farneb?ck
// [email protected]
/* */
//
// You are free to do whatever you want with this code.
//
//
// This program computes the number of legal go board configurations
// for a rectangular board of a given size. It is efficient enough to
// handle boards up to 8x8 within minutes and up to 11x11 in less than
// 24 hours (on a fast computer). For rectangular boa... 阅读全帖 |
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W***o 发帖数: 6519 | 15 可以试试react native + exponent.js吧
我最近打算把以前做一半的iOS native app推倒重心用react native写一遍,可以同时
出android和ios了 |
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D**********N 发帖数: 743 | 16 明年5月PHD毕业,Aerospace Engineering系的,主攻复合材料实验方面
已经投了两个多月了,一点消息都没有,GE. Boeing,dupont,Exponent都网投了,一
点音讯都木有,伤心啊。
不知道在复合材料方面的都去哪里工作呢? |
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D**********N 发帖数: 743 | 17 明年5月PHD毕业,Aerospace Engineering系的,主攻复合材料实验方面
已经投了两个多月了,一点消息都没有,GE. Boeing,dupont,Exponent都网投了,一
点音讯都木有,伤心啊。
不知道在复合材料方面的都去哪里工作呢? |
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l***y 发帖数: 1166 | 18 We owe the discovery of this mysterious biogenetic process to our scientist
AOYOO 221.
It had been discovered a long time before that in the human brain were
krypton atoms (a rare gas that you know), and this discovery was a
significant, transcendent one. It was quite simply the key to the OEMBUAW,
MAN'S THIRD FACTOR, which you do not know and which acts as a link between
the HEART and the BODY (BUAWAA and OEMII).
69 XEE before [approximately 18 months NdT ], in laboratory fertilization
experime... 阅读全帖 |
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l***y 发帖数: 1166 | 19 We owe the discovery of this mysterious biogenetic process to our scientist
AOYOO 221.
It had been discovered a long time before that in the human brain were
krypton atoms (a rare gas that you know), and this discovery was a
significant, transcendent one. It was quite simply the key to the OEMBUAW,
MAN'S THIRD FACTOR, which you do not know and which acts as a link between
the HEART and the BODY (BUAWAA and OEMII).
69 XEE before [approximately 18 months NdT ], in laboratory fertilization
experime... 阅读全帖 |
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O*R 发帖数: 609 | 21 exponent的engineer不算有啥背景吧。。。 |
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l*****r 发帖数: 990 | 22 确实,人各有志,但此版上广泛流传博士无用论,让老夫愤慨。老夫想说的是,如果你
读下博士来,你也会有广阔天地,不会埋没你。你若名校读下博士,也算那10%乃至5%
的人才,为何不能去那10%乃至5%的公司呢?“弱水三千,我只取一瓢饮”,有一家好
公司就足够了。我不否认中国人选择读硕士,其实潜力不比博士差。但是,你少了4-5
年的正规研究经历和若干博士课程,你没经过名师指点,在专业能力上,如何比我等傻
博强啊?工作10年之后,你早3,5年的工作经历,如何有更大优势啊?
如果有一天,我想换工作,各种工作真如探囊取物。我可能会去政府部门,如加州交通
局(caltrans),美国地质勘探局(USGS),待遇好,工资高的铁饭碗;也可以去URS,
Fulgo, Geosynthetic, Earth Mechanics等众多的咨询公司,绝不可能会在一颗树上吊
死。选择仍然多多,工作不再是混口饭吃而已,还要发展自己的专业和兴趣。目前老夫
已答应香港的一家大学,去做教职去也。工业界学术界自由切换,真痛快也。
我另一个环境工程博士同学刚刚签了exponent, 看看人家的阵容,你就知为何了:
Officer |
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l*****r 发帖数: 990 | 23 Exponent起薪给了8万2,还没有讲价。准备往9万上要。 |
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g******6 发帖数: 782 | 24 另外,myvisajob上显示Exponent在北加,土木的雇员工资并不高。中部的也
就5,6万的样子,不信可以自己查。 |
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J****7 发帖数: 375 | 25 laphier一会师妹要选择去了一家保险公司,起薪接近9万。一会环境工程博士同学刚刚
拿了 exponent 的offer,准备要价9万。VT 也不算怎么TOP,怎么phd 出路都怎么好?
真后悔没去VT啊! |
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l*****r 发帖数: 990 | 26 感觉说了一大堆工具,其他什莫都没说。还是环境为主吧。
就学这个吧,将来去exponent,也拿8,9万的起薪。 |
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C*S 发帖数: 1658 | 27 1. Typically PhD degree is required only for faculty SE position.
2. Very few, if any, structural firms that explictly look for SE PhDs.
3. SE PhDs do find jobs in structural firms, usually at a level that require
only MS degree at most.
4. There does exist some firms that, at least in their advertisement, prefer
(or do not discourage) PhD applicants. Personally I do not know if this is
really the case or only a faked advertisement for someone's green card application.
The following are some fir... 阅读全帖 |
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t**********g 发帖数: 920 | 28 比如exponent里面有不少各种PhD,还全是名校毕业的,不过也不知道他们每天做什么
样的活 |
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b****d 发帖数: 847 | 29 语言交流没问题可以去试试WJE associates, exponent inc, weidlinger这些喜欢给人
打官司的 |
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m****n 发帖数: 51 | 30 1999,2000
PRL reported two methods to calculate Lyapunov exponents. To my experience, th
eperformance of both methods is very poor. |
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j*******r 发帖数: 1 | 31 Hi,
Does anyone have any idea to prove the following inequality :
Assuming a, b, c and q are real numbers satisfying :
1) a>=1, b>=1 , c>=1 , q>=1
2) abs(a-b)
where abs() denotes absolute values.
3) q>=2
Prove:
abs(a^q-b^q)
where ^ stands for power and q is the exponent.
Any suggestions and comments are very welcome.
Thanks.
Min |
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m*******s 发帖数: 22 | 32 我按照Boffetta及Aurell的经典计算方法写了个matlab的程序,
但结果就是不对。有大虾做过这个吗?大家讨论一下吧,谢谢! |
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k*****c 发帖数: 5 | 33 There seems to be quite some confusion about this problem. Let me rephrase
this problem first, just to see if we have the same understanding: For an AWGN
channel with fixed SNR, the problem being asked is given the block length,
what is the maximum rate to achieve a certain block error rate, say $10^{-6}$
here. Rockey, is it your question?
For me, the first thought is Gallager's random coding error exponent $P_e \leq
\exp{-nE_r(R)}$. Refering the curve $E_r(R)$ V.S. $R$, you can obtain an upper |
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V******i 发帖数: 306 | 34
解。
...
建议你找篇爱因斯坦的论文读一读。因为研究的关系,我读过一篇,实在只能说读不懂
数学家的文章。Verdu文章里的数学和他比好像是小儿科了。至少我还能懂。工业界我
不了解,就不多说吧。但是说到Viterbi,他1967年的成名作有几个人认真读过吗?我
可也是认真读过的。那里面的数学好歹是用来分析error exponent的,也不能说浅吧。
不过Viterbi后来的文章可不怎么样。当然他赚了很多钱。可能按照这个标准,没人有
资格说他什么。但是钱并不是一切(关于Viterbi的这个评论据说是Forney说的,我只
是套用一下。免得你质疑我评论Viterbi的资格)。 |
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g****t 发帖数: 31659 | 35 Einstein有两个approach.
年轻时候他把数学当自己思考结果的表示语言.广义相对论之后,
他才把数学当思考和研究工具.这两个approach对学界影响都很大.
你前头说的是年轻Einstein,他那时候的狭义相对论文章,光电效应文章.
一多半都是加减乘除,微积分符号都不多.光电效应文章名字就叫作
"On a heuristic viewpoint concerning .....".
我最后说一句:你不清楚的东西,不要想当然.
另外Viterbi后来的贡献不仅仅是赚了钱.人家贡献了高质量的产品.
你难道不懂:Viterbi如果愿意透漏公司机密,显然能发无数高质量文章.
解。
...
建议你找篇爱因斯坦的论文读一读。因为研究的关系,我读过一篇,实在只能说读不懂
数学家的文章。Verdu文章里的数学和他比好像是小儿科了。至少我还能懂。工业界我
不了解,就不多说吧。但是说到Viterbi,他1967年的成名作有几个人认真读过吗?我
可也是认真读过的。那里面的数学好歹是用来分析error exponent的,也不能说浅吧。
不过Viterbi后来的文章可不怎么样。当然他赚了很多钱 |
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F***e 发帖数: 23 | 36 多谢各位高人的回答!我很受启发。这可能就是理论和实际的不同之处吧,做理论研究
,模型不能太复杂,大多是建立一个尽可能简单又抓住本质的模型,否则没法做。
〉但是说到Viterbi,他1967年的成名作有几个人认真读过吗?我 可也是认真读>过的
>。那里面的数学好歹是用来分析error exponent的,也不能说浅吧。不过>Viterbi后来
>的文章可不怎么样。当然他赚了很多钱。可能按照这个标准,没人>有资格说他什么。
>但是钱并不是一切(关于Viterbi的这个评论据说是Forney说>的,我只是套用一下。免
>得你质疑我评论Viterbi的资格)。
呵呵,我也看过,好像是performance bounds吧(一个实际中基本没用的东西)。对于
Viterbi的理论造诣,我也是非常佩服的,他的书Principle of Digital
Communication and Coding,其深度是和Gallager同一水准的。至于后来,可能没有那
么多精力吧。不过,同时在理论和实际达到巅峰,Viterbi可能是前无古人,后无来者
了! |
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g****t 发帖数: 31659 | 37 刚才翻了翻书。发现这个问题确实不简单。
hold circuit一般处理的都是比较短时间的hold,
leakage造成的drop的处理已经很复杂。
他原问题要求的hold时间,肯定比一般的
zero order hold之类东西里面的hold时间长不少。
所以我想,最佳方案可能还就是A/D然后把数字存起来。
the leakage is primarily due to sampling switches, not the silicon oxide
between the capacitor top plate and bottom plate.Most CMOS processes are
junction isolated. If you draw a structure of such MOSFET, you will see
reverse biased PN junction associated with the MOSFET. The reverse biased PN
junction has leakage current, which is exponent |
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s****e 发帖数: 140 | 38 我原来把consulting也放在工业界的范畴,另外consulting感觉也有两种,一种像是服
务外包,另外一种可能更偏向scientific consulting,前者好像比较喜欢招本科,后
者好像对工作经验要求很高。比如exponent的,感觉要求超高啊。 求点评。
至于政府吧,我其实一直也没整明白,但是好像确实有人可以去州政府的,至少cal
epa是有人去的,不知道其它州咋样。联邦体系可能比较难?而且记得在版面上看过说
,有朋友,有去postdoc的,有工业界的,最后都去政府养老了,难道是入籍后才去政
府的?
???
comes |
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w********h 发帖数: 12367 | 39 来自主题: Macromolecules版 - 问个问题 oh, I know what you mean. that does not help much considering even star
polymers can give good G' G" lines in terminal regime against frequency by
exponents of 2 and 1.
finish
of |
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c*****e 发帖数: 238 | 40 composition fluctuation应该差不多吧.
不过在critical point附近,体系的行为由critical point决定,这样当你做
展开的时候,自然会有power law的结果,至于non-analytical exponent,这就需要比较
多的东西了. |
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B********e 发帖数: 10014 | 41 it seems that no explicit expression exists.
you can substitue y for the exponent ,solve x for y then end up with the dec
oupled integrations. one of the integration is like:
\int{exp(k\sqrt{1-x^2})dx}. but as simple as this one it's difficult to get
explicit anti-deri. |
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w********i 发帖数: 244 | 42 All Experts,
I want to calculate the x**(0.425) without using a calculator? I would like
to write the program for it. I do not know if there is existing
approximation approaches (way or formula) for this. X is a variable .
Thank you very much!!! |
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h**********c 发帖数: 4120 | 43 又翻了翻wiki觉得泰勒多项式是可行的,
本人提供c++,java服务,
各种方式的报偿均可(含伪币),站内信。 |
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s*********4 发帖数: 199 | 45 从x^(1/2+a)对a展开
或者 exp^(4.25*lnx),指数对数都用级数表示 |
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g*****h 发帖数: 15 | 48 College Algebra by Larson & Hostetler
DVDRip | MKV / AVC 692 Kbps | 720х544 | 29.97 fps | MP3 128 kbps | 8.75 GB
Language: English
Lecture Titles:
Prerequisites
P-1 Review of Real Numbers and Their Properties
P-2 Exponents and Radicals
P-3 Polynomials and Special Products
P-4 Factoring
P-5 Rational Expressions
P-6 Errors and the Algebra of Calculus
P-7 Graphical Representations of Data
Chapter 1 – Equations and Inequalities
1-1 Graphs of Equations
1-2 Linear Equations in in One Variable
1-3 Mode... 阅读全帖 |
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m****t 发帖数: 570 | 49 随便找来2篇Gallager这几年参与的工作,都没署名
TIT 58(1)
The authors would also like to thank R. G. Gallager
for various discussions on the encoding scheme presented in
Section III and the two-message error-exponent tradeoff.
TIT 55(2)
The authors are indebted to Robert Gallager for his insights
and encouragement for this work in general. In particular, Theorem
3 was mainly inspired from his remarks. |
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L*m 发帖数: 235 | 50 近十年JAMS上的华人作者,JAMS上的文章相对更多,搜的没那么仔细,有可能不完全。
大家也看看有没有漏的
2015
Kähler-Einstein metrics on Fano manifolds. I: Approximation of metrics
with cone singularities
Xiuxiong Chen, Simon Donaldson and Song Sun.
Kähler-Einstein metrics on Fano manifolds. II: Limits with cone angle
less than 2π
Xiuxiong Chen, Simon Donaldson and Song Sun.
Kähler-Einstein metrics on Fano manifolds. III: Limits as cone angle
approaches 2π and completion of the main proof
Xiuxiong Chen, Simon Donaldson... 阅读全帖 |
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