t*******r 发帖数: 22634 | 1 那为啥那些题给人感觉是在 Algebra I 阶段 spiral 将来的 analytic geometry 的感
觉?
另外美帝高中里,analytic geometry 是不是在 Algebra II 里学的? |
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t*******r 发帖数: 22634 | 2 昨天 6 年级班发电子书,数学部分把 6、7、8 三个年级的书一起发下来了不算。娃娃
们之间疯狂谣传明年 7 年级上 9 年级代数1。
俺于是目测加展望了一下,毛估普通非天才的快班进度速度应该是:
6 年级:Pre-algebra 6、7、8 三个年级。
7 年级:Algebra I & II, Geometry,Trigonometry 整个 high school math
8 年级:Pre-calculus,Calculus 等整个非数学专业本科数学。
9 年级:群论、域论、场论、图论、combinatorics、differetial geometry、formal
logics 等牛角尖数学。
10 年级:(是不是只能放羊了?) |
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l*****8 发帖数: 16949 | 3 哈哈,有才。学完geometry,differntial geometry也就会了。学完calculus, multi-
variable calculus也就会了。以后我就那么糊弄人。 |
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x*****1 发帖数: 201 | 4 发表于 2015-8-19 05:46
儿子刚上6年级,公校,他们5年级结束前做了Placement Test,所以6年级分了2个
tracks,儿子在快的那一个。学校现在搞Common Core,学校的计划是快班6年级学
Math 6、Math 7年级两年的课,慢班只学Math 6。6年级结束时在做一次测试,然后就
有3个tracks,最慢的7年级学Math 7,原来慢班中好的和快班中差的合并成中等班学
Math7、Math8两年的课,最快的就学Math 8和Algebra 1。然后8年级时,最快的班学
Geometry,中等的学Algebra 1,最慢的半学Math 8。
我儿子5年级的时候通过数学小组活动和AoPS,学了Pre-algrebra和Algebra 1。由于是
课外学的,花的时间不是很多,我担心不是很牢靠,所以重学一下也好。开学一个多星
期,问儿子数学课上的怎么样,儿子说老师讲的东西很tedious,我说要不要找老师换
到高年级的可,儿子是怕事的人,不想显得另类,就说不好。我还是Email问数学老师
和Counselor(她病了,让我找校长),校长说,如果跳过这个班... 阅读全帖 |
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t******l 发帖数: 10908 | 5 从这个角度说,小娃认知 “苹果” 这个概念(不一定能说出来),是一个 level
的 concretize,也就是不管纽约红苹果,还是 TJ 熟苹果,都是苹果不是?
然后的事儿,小娃认知 “实物数数” 的概念,是往上一个 level 的 concretize。
也就是说,不管是 3 只纽约红苹果,还是 3 只 TJ 熟苹果。都是 3。
但这个 level 的同时,还会发生另一个 concretize,using rule/hint。
比如,jigsaw puzzle 咋能快速拚上,chess rule 咋使用,等等等等。
然后就是上了 arithmetic property,这个阶段 property 也是 using rule/hint。
然后就是上了 variable / constant / simple expression,using rule/hint
in algebra expression。(pre-algebra)。
然后我觉得 algebra 1 开始了一个转换点,在这点上,rule/hint 本身,开始成为
一个 concrete 的 object。也就是说,p... 阅读全帖 |
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t******l 发帖数: 10908 | 6 从这个角度说,小娃认知 “苹果” 这个概念(不一定能说出来),是一个 level
的 concretize,也就是不管纽约红苹果,还是 TJ 熟苹果,都是苹果不是?
然后的事儿,小娃认知 “实物数数” 的概念,是往上一个 level 的 concretize。
也就是说,不管是 3 只纽约红苹果,还是 3 只 TJ 熟苹果。都是 3。
但这个 level 的同时,还会发生另一个 concretize,using rule/hint。
比如,jigsaw puzzle 咋能快速拚上,chess rule 咋使用,等等等等。
然后就是上了 arithmetic property,这个阶段 property 也是 using rule/hint。
然后就是上了 variable / constant / simple expression,using rule/hint
in algebra expression。(pre-algebra)。
然后我觉得 algebra 1 开始了一个转换点,在这点上,rule/hint 本身,开始成为
一个 concrete 的 object。也就是说,p... 阅读全帖 |
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t******l 发帖数: 10908 | 7 其实 “猴版 intuitional constrained optimization” +
“猴版 intuitional transformation geometry” 的直觉,
也能算很严格了。比如这么解释:
(1)这题两个 constraint 是 “大正方形” 加 “四个小正方形”。
constraint 90 度旋转对称。constraint 的要求是 no-intersection。
(2)所以满足 constraint 的最大的正方形的中心,必然在旋转对称点。
(3)而正方形中心固定之后,在给定的倾角 alpha,在该倾角下找到
最大的正方形,那就是个 trivial problem。
(4)所以问题就是找到最大正方形所对应的倾角 alpha,于是绕场一周
就完事了。(其实因为 90 度旋转对称,绕场 1/4 圈就够了)。
但是问题就是中学老师不认猴版 intuitional,中学娃也说不清猴版
intuitional。
这个最终还是 “显然” 的定义,中学老师觉得 ”基于石器时代的严格
石器逻辑的欧氏几何” 是非常 “显然”,但马工觉得 “猴版 intuitiona... 阅读全帖 |
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t******l 发帖数: 10908 | 8 我做完这个以后,看了一下网上 solution 2,,终于明白了 solution 2 的天外飞仙辅
助线。。。但我以前一看 solution 2 时候看不见思路的原因,是 solution 2 先给我
来个 AC = MO,这个是计算长度得到的数字巧合,而不是通常人直觉看到的 geometry
clue。。。所以这些解法的一个共同点,是先注意数字和字母表达式,甚至数字巧合都
能在标准 geometry clue 前先被发现,所以我觉得很可能有 hypernumeracy 的倾向。
。。通常人不会往这个方向想。
:回到这道题,这道题还有一个更快的标准型不动脑子的解析几何心算解法,也不用解
二次方程组。解法是: |
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t******l 发帖数: 10908 | 9 这就是为啥我觉得 1983 AIME Problem 4 的网上答案 failed on "Sally-Anne test"
的原因。
Because why my math teacher Anne (who love to play hide-and-seek game), on
the problem AIME # 4 (which not supposed to be extremely difficult), want us
solve the holy crap simultaneous quadratic equation, in the case the
problem seems have general solutions (solution algorithm not specific to the
actual length/angle) in the linear "scope".
So possibility 1: My math teacher Anne, she wanna us to solve it by chasing
triangles (euc... 阅读全帖 |
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c****8 发帖数: 33 | 10 怎么能当上海科大的副校长?
EDUCATION:
1990 Ph.D. Inorganic Chemistry, Purdue University
1982 Undergraduate Education, East China Normal University, Shanghai,
China.
EXPERIENCE:
1998- Professor of Chemistry, Southeast Missouri State University
1994- Associate Professor of Chemistry, Southeast Missouri State University
1990-1994 Assistant Professor of Chemistry, Southeast Missouri State
University
1993 summer NASA JOVE Research fellow, Lewis Research Center, Cleveland, OH.
1991 summer Visiting Professor,... 阅读全帖 |
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S*********g 发帖数: 24893 | 11 【 以下文字转载自 StephenKing 俱乐部 】
发信人: StephenKing (金博士), 信区: StephenKing
标 题: 不系安全带,John Nash今天车祸死了
发信站: BBS 未名空间站 (Sun May 24 11:17:59 2015, 美东)
John Forbes Nash, Jr.
Born June 13, 1928
Bluefield, West Virginia, U.S.
Died May 23, 2015 (aged 86) [1]
Residence United States
Nationality American
Fields
Mathematics
Economics
Institutions
Massachusetts Institute of Technology
Princeton University
Alma mater
Princeton University
Carnegie Institute of Te... 阅读全帖 |
|
l*****y 发帖数: 6 | 12 1. Position: Full-time Scientist
Department of Computer Vision and Image Understanding
Institute for Infocomm Research (www.i2r.a-star.edu.sg), Singapore
2. Job description:
You will work independently as well as with other team members to develop
algorithms and systems in vision-based 3D sensing techniques for 3D surface
profilometry using multi-cameras and structured lighting and analyze color
images to detect and evaluate defects in industry parts for quality control.
Besides, you will also n... 阅读全帖 |
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g******4 发帖数: 6339 | 13 Us news排名用的是college readiness,就是12grade选AP课的比率.
让我们先解释一下AP。把数学作为一个例子.
高中,学生需要 take 四门数学课程: Algebra I, Geometry, Algebra II,
Precalculus.
如果你高中四年, 每年take 一门, 没有机会take AP Math: Calculus AB or Calculus
BC or AP
Statistics.
好学生,在7,8年级,or summer, take 一门 或两门 (Algebra I, Geometry), 然后有
机会take AP 数学课程.
因此,college readiness高,是指这高中有更多的好学生. |
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d**********r 发帖数: 24123 | 14 【 以下文字转载自 Joke 讨论区 】
发信人: laocat (猫老), 信区: Joke
标 题: [转载]学友眼中的大神——恽之玮究竟有多强 (转载)
发信站: BBS 未名空间站 (Tue Nov 4 19:24:22 2014, 美东)
发信人: lookacar (买买提外f研究专家), 信区: Military
标 题: [转载]学友眼中的大神——恽之玮究竟有多强 (转载)
发信站: BBS 未名空间站 (Tue Nov 4 16:23:15 2014, 美东)
发信人: monic (monic), 信区: Mathematics
标 题: [转载]学友眼中的大神——恽之玮究竟有多强
发信站: BBS 未名空间站 (Sun Sep 28 22:11:06 2014, 美东)
畅想未来的话:推荐这篇日志的原因很简单,给所有期望在学科研究上能有所建树的学
子们一面镜子,镜子里不仅有这位昔日的IMO金牌、北大数院毕业后前往MIT攻读博士后
、29岁拿到拉马努金奖、现在Stanford做Assistant Professor的大神恽之玮,还有比
利时数学家Pierr... 阅读全帖 |
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y*e 发帖数: 9799 | 15 First, it's Geometry class, not geometric class; secondly, there is no
practical reason for any Geometry class to require pi to so many decimal
places. My class only required 3.14. |
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y*****n 发帖数: 5016 | 16 你自己看吧。元首来得比你想象的快。
http://www.philly.com/philly/news/local/20121005_Philadelphia_s
Philadelphia student mocked over Romney T-shirt says she fears for her
safety
By Jonathan Lai
Inquirer Staff Writer
Samantha Pawlucy said she was afraid to return to Charles Carroll High
School after complaining that a teacher mocked her for wearing a Romney/Ryan
T-shirt on dress-down day.
The sophomore said classmates, former friends, and even students from other
schools had issued threats over what they saw as li... 阅读全帖 |
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h******2 发帖数: 1498 | 17 yeah you were right...
but even a year ago i was not ready for the stretched-out geometry. i only
got comfortable in the past few months with the "sitting-in" position. now
my ideal geometry would be a 54 + 11cm. |
|
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m******r 发帖数: 9604 | 19 我上上个月也出血在PB做了bike fit. 上个月和一个tri club一起骑,他们说我的bike
fit得还是road geometry的干活,建议我去他们车店fit个tri geometry一点的。wk! |
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m******r 发帖数: 9604 | 20 是。有一次和本地tri club一起骑,他们说fit得更像road geometry,而不是tri
geometry. |
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R*****s 发帖数: 41236 | 21 【 以下文字转载自 Tri 讨论区 】
发信人: Rodimus (变叔- 忍者神龟), 信区: Tri
标 题: The New Cervelo P5... coming soon to nytro!
发信站: BBS 未名空间站 (Wed Jan 18 00:05:36 2012, 美东)
http://www.nytro.com/index.cfm/nytro-blog/the-new-cervelo-p5-co
nytro/
At Cervelo, aerodynamics benchmarks are meant to be reset. And they are
doing it once again with the one tri bike you've been waiting for - The new
Cervelo P5
The much anticipated lauch in 2011 has been pushed back to perfect and make
some final tweeks. Worth the wait? Definitely... 阅读全帖 |
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d******y 发帖数: 49 | 22 How do you guys think about this bike? good one? Thank Wuyan for correct the
website. I need a bike to go to work every day, 5miles/one way. Thank you
foe suggestion.
Nashbar NB-WR2A
Compare At: $1,349.99
Nashbar: $799.99
nashbar WR-2 Women's Road Bike
Tired of "shrink it and pink it" road bikes? You don't need a small,
repainted men's bike. You need a bike built from the ground up for a woman.
Built with a woman's physique in mind. You need the Nashbar WR-2 road bike.
It features a lightweight ... 阅读全帖 |
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m******i 发帖数: 9479 | 23 今天下午出去逛了一大圈,大概把目标定了。
因为是骑车去上学,学校丢车据说丢得挺厉害的,所以budget不高,不超过500。去LBS
看过几家,500以内买不到road bike,所以基本上就只能买hybrid了。
在dick's sporting goods 看到了这款
http://www.dickssportinggoods.com/product/index.jsp?productId=1
FEATURES:
Clarity 6061-T6 butted aluminum Devine geometry performance hybrid with
formed hooded top tube, integrated head tube and Diamondback Snake Seat
Stays
Clarity integrated Aero Alloy straight blade with an alloy steerer
Shimano Alivio Rapid Fire 8-speed shifters
Avid SD-3 linear pull brakes
2... 阅读全帖 |
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f**********e 发帖数: 1994 | 24 Giant -- compact road geometry, integrated seatpost
Cannondale -- Caad aluminum, hybrid materials, bb30
Specialized -- aero design
Cervelo -- squoval tube, true aero tube, tri specific geometry
疑?怎麼全是台灣和北美的公司呢? |
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l*******e 发帖数: 309 | 25
我的是cannondale synapse(endurance
geometry).有次骑车上班路上,一个哥们从我身边经过。我很高兴的说我们车一样。
他瞟了我车一眼,略带鄙视的说,我的是super six(race geometry) |
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n******h 发帖数: 97 | 26 那咋办呢?一来就上好车?
关键现在也不懂行,怕被小二忽悠买个好车结果以后发现其实应该买另一种,或者是该
买另一个大小(比如现在觉得身体能够稍微直起来一点,手和腰的压力都小一点,那可
能觉得endurance geometry挺好,结果后来真正race起来了又觉得endurance geometry
不够快)到时候把碳车换掉还是很心疼的呀。 |
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c*******r 发帖数: 13580 | 27 roadie geometry with aero bars wouldn't be very comfy for an aero dynamic
position. tri geometry really makes a big difference. I'm not that much into
it though.
车在 |
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h*****8 发帖数: 2667 | 28 "Foundations and Fundamental Concepts of Mathematics" by Howard Eves
1: Klein's definition: A geometry is the study of those properties of a set
that remain invariant when the elements of the set are subjected to the
transformations of some transformation group.
2: historical contingency. If someone's analysing an axiomatic system that's
descended from Euclid (in the sense of asking a chain of mathematicians
extending backwards in time, 'so what made you think of this') then it's a
geometry. If ... 阅读全帖 |
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b*s 发帖数: 82482 | 29 我也来一个书单:
Homer – Iliad; Odyssey
The Old Testament
Aeschylus – Tragedies
Sophocles – Tragedies
Herodotus – Histories
Euripides – Tragedies
Thucydides – History of the Peloponnesian War
Hippocrates – Medical Writings
Aristophanes – Comedies
Plato – Dialogues
Aristotle – Works
Epicurus – "Letter to Herodotus"; "Letter to Menoecus"
Euclid – Elements
Archimedes – Works
Apollonius – Conics
Cicero – Works (esp. Orations; On Friendship; On Old Age; Republic; Laws;
Tusculan Disputations; Offices)
Lucreti... 阅读全帖 |
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v*******e 发帖数: 3714 | 30 不知道你那个“搞分析的喜欢提琴”的论调,是不是来自周xing wei,
我是做组合的,倒也算得上喜欢钢琴,不过只有吉他是伸手可及的。
我们系一个教授一个学生玩钢琴,教授是Algebraic geometry,
学生是Differential geometry,看来钢琴背后那些看不见的琴弦,
跟几何空间里多数看不见的瓶瓶罐罐们还能找到点亲戚关系。 |
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E***X 发帖数: 885 | 31 I like the layered and balanced geometry to create a sense of space and
depth.The structure and tone are very pleasing to my eyes.You may argue the
same thing in 10 and 11.However, I have saw enough similar setup of 10. 11
has a nice geometry composition and give me a feeling of old times. I don't
quite like the shallow depth of field. |
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d******a 发帖数: 32122 | 32
你就不用造谣了。当然了,造谣者会改口说不突出是指爱因斯坦没拿奥赛金牌。
爱因斯坦图画法语之类一般,物理数学都是优秀
Certificate of qualification for
university matriculation
Albert Einstein
Aarau, den 5. Sept. 1896
Deutsch 5
Französisch 3
Englisch -
Italienisch 5
Geschichte 6
Geographie 4
Algebra 6
Geometrie 6
Darstellende Geometrie 6
Physik 6
Chemie 5
Naturgeschichte 5
Kunstzeichnen 4
Technisches Zeichnen 4
Marks: 6 = excellent, 5 = good, 4 = sufficient, 3 = poor, 2 = very poor, 1
= unusab... 阅读全帖 |
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x********u 发帖数: 12 | 33 关于近期Fano流形上构造Kähler-Einstein度量的工作
最近公布的Fano流形上构造Kähler-Einstein度量的工作,是Kähler几
何近年来引人注目的进展,专家们正在验证。若验查无误,将证明丘成桐关于Fano流形
的构想与猜测是正确的。Donaldson的稳定性条件是其中的关键步骤,还需在代数几何
上把此概念搞清楚,这样丘猜测就为深刻理解Fano流形奠定了基础。由于近期发生了一
些混淆不清的事件,我们将相关工作的公开记录做了客观、学术的分析,望有助于澄清
事实。本文主要涉及文献的比较,阅读本文无需是专家,数学专业本科高年级学生或研
究生可读懂绝大部分。欢迎关于数学上的批评与指正。
本文分三个部分:
1) 陈-Donaldson-孙的报告与文章
2) 田的报告与文章
3) 结论
I. 陈-Donaldson-孙的报告与文章
在最近的一系列文章中,陈秀雄-Donaldson-孙崧(CDS)宣布解决了Kähler
几何中悬置多年的问题。
丘成桐猜测:设M为一紧致K... 阅读全帖 |
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S*********g 发帖数: 24893 | 34 【 以下文字转载自 StephenKing 俱乐部 】
发信人: StephenKing (金博士), 信区: StephenKing
标 题: 不系安全带,John Nash今天车祸死了
发信站: BBS 未名空间站 (Sun May 24 11:17:59 2015, 美东)
John Forbes Nash, Jr.
Born June 13, 1928
Bluefield, West Virginia, U.S.
Died May 23, 2015 (aged 86) [1]
Residence United States
Nationality American
Fields
Mathematics
Economics
Institutions
Massachusetts Institute of Technology
Princeton University
Alma mater
Princeton University
Carnegie Institute of Te... 阅读全帖 |
|
d**********o 发帖数: 1321 | 35 我与Emacs的不解情缘(9)
差不多去年暑假后回学期也学会了自己写macro,贴个前段时间做题时写过的写lc的模
板吧:M-x lc ENT :
(fset 'lc
[?# ?i ?n ?c ?l ?u ?d ?e ? ?< ?i ?o ?s ?t ?r ?e ?a ?m ?> return ?# ?i ?n
?c ?l ?u ?d ?e ? ?< ?v ?e ?c ?t ?o ?r ?> return ?# ?i ?n ?c ?l ?u ?d ?e ?
?< ?a ?l ?g ?o ?r ?i ?t ?h ?m ?> return ?# ?i ?n ?c ?l ?u ?d ?e ? ?< ?c ?s
?t ?r ?i ?n ?g ?> return ?# ?i ?n ?c ?l ?u ?d ?e ? ?< ?c ?m ?a ?t ?h ?>
return ?# ?i ?n ?c ?l ?u ?d ?e ? ?< ?s ?t ?a ?c ?k ?> return ?# ?i ?n ?c ?l
?u ?d ?e ? ?< ?q ?u ?e ?u ?e ?> retur... 阅读全帖 |
|
d**********o 发帖数: 1321 | 36 第一个项目report
这时偶刚到CSAC工作不久,与小A同学还不熟,我用的还是latex。随着贴的作业越来越
多,应该是用有共同爱好的小伙伴更亲密些。这次贴latex,下次才再org-mode。
\documentclass[b5paper,11pt, abstraction, titlepage]{scrartcl}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{CJKutf8}
\usepackage{multirow}
\usepackage{multicol}
\usepackage{listings}
\usepackage{geometry}
\geometry{b5paper}
\usepackage{graphicx,floatrow}
\usepackage{graphicx,subfigure}
\newsavebox{\abstractbox}
\renewenvironment{abstract}
{\begin{lrbox}{0}\begin{minipage}{\t... 阅读全帖 |
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d**********o 发帖数: 1321 | 37 我与Emacs的不解情缘(9)
差不多去年暑假后回学期也学会了自己写macro,贴个前段时间做题时写过的写lc的模
板吧:M-x lc ENT :
(fset 'lc
[?# ?i ?n ?c ?l ?u ?d ?e ? ?< ?i ?o ?s ?t ?r ?e ?a ?m ?> return ?# ?i ?n
?c ?l ?u ?d ?e ? ?< ?v ?e ?c ?t ?o ?r ?> return ?# ?i ?n ?c ?l ?u ?d ?e ?
?< ?a ?l ?g ?o ?r ?i ?t ?h ?m ?> return ?# ?i ?n ?c ?l ?u ?d ?e ? ?< ?c ?s
?t ?r ?i ?n ?g ?> return ?# ?i ?n ?c ?l ?u ?d ?e ? ?< ?c ?m ?a ?t ?h ?>
return ?# ?i ?n ?c ?l ?u ?d ?e ? ?< ?s ?t ?a ?c ?k ?> return ?# ?i ?n ?c ?l
?u ?d ?e ? ?< ?q ?u ?e ?u ?e ?> retur... 阅读全帖 |
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d**********o 发帖数: 1321 | 38 第一个项目report
这时偶刚到CSAC工作不久,与小A同学还不熟,我用的还是latex。随着贴的作业越来越
多,应该是用有共同爱好的小伙伴更亲密些。这次贴latex,下次才再org-mode。
\documentclass[b5paper,11pt, abstraction, titlepage]{scrartcl}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{CJKutf8}
\usepackage{multirow}
\usepackage{multicol}
\usepackage{listings}
\usepackage{geometry}
\geometry{b5paper}
\usepackage{graphicx,floatrow}
\usepackage{graphicx,subfigure}
\newsavebox{\abstractbox}
\renewenvironment{abstract}
{\begin{lrbox}{0}\begin{minipage}{\t... 阅读全帖 |
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o******1 发帖数: 12177 | 39 You are just talking about geometry. ... have you heard of a theory called "
world sheet" ? it is not a god or something, but it says, as long as you kee
p track of the movement of strings according to the quantum mechanics, but w
ithout a pre-defined spacetime, you reach a spacetime that is Eninstein's, i
n which light speed is a constant.
moreover, if you heard of something called gauge symmetry, you would know th
at gauge symmetry requrie EM fields to exist, and photons to exist, and thei
r s... 阅读全帖 |
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l****t 发帖数: 36289 | 40 【 以下文字转载自 Military 讨论区 】
发信人: lookacar (买买提外f研究专家), 信区: Military
标 题: [转载]学友眼中的大神——恽之玮究竟有多强 (转载)
发信站: BBS 未名空间站 (Tue Nov 4 16:23:15 2014, 美东)
发信人: monic (monic), 信区: Mathematics
标 题: [转载]学友眼中的大神——恽之玮究竟有多强
发信站: BBS 未名空间站 (Sun Sep 28 22:11:06 2014, 美东)
畅想未来的话:推荐这篇日志的原因很简单,给所有期望在学科研究上能有所建树的学
子们一面镜子,镜子里不仅有这位昔日的IMO金牌、北大数院毕业后前往MIT攻读博士后
、29岁拿到拉马努金奖、现在Stanford做Assistant Professor的大神恽之玮,还有比
利时数学家Pierre Deligne(皮埃尔·德利涅)以及德国数学家Gerd Faltings (格尔
德·法尔廷斯)和Peter Scholze等大神的影子,更为重要的是,作者揭示了大神之所以
能称为“大神”,背后所付出... 阅读全帖 |
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s********c 发帖数: 248 | 41 感兴趣的,可以去听一下他的talk(如果能听得懂的话)
Dr. Yau Shing-Tung, a leader in differential geometry, will be giving a talk
on
campus, Friday, September 24. The talk, The Shape of Inner Space: String
Theory
and the Geometry of the Universe's Hidden Dimensions, will be held in the
Physic
s Lecture Hall (1412 Physics Building) from 1:00 - 1:50 and will be followed
by
a book signing and reception in room 1303. |
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w********r 发帖数: 94 | 42
FEM软件恐怕只有windows才有。我个人觉得用笔记本做这些事情的话,主要工作就是做
Geometry,然后将Geometry导入到工作站上运行。一定要在laptop上跑FEM,FDTD或者
MoM之类的东西没有意义啊。
MAC OS+Parallel Desktop+Win7 挺方便的,这是满足你这种需求最好的办法了。 |
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y***s 发帖数: 294 | 43 process algebra对cs people有用在什么地方?
CG的好书除了下面这两本还有啥经典的?
Computational Geometry: Algorithms and Applications (2nd Edition) , by Marc Va
n Kreveld, Otfried Schwarzkopf, Mark Overmars, Mark De Berg.
Hardcover, 367 pages. Springer Verlag. 18th February, 2000.
Computational Geometry: An Introduction , by Franco P. Preparata, Michael Ian
Shamos.
Hardcover. Springer Verlag. 1st January 1991. |
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o**y 发帖数: 1466 | 44 I have written a procedure in a package but the performance is very slow
which takes forever to execute. After more than 1 hour now it is still
spinning. however if I run the exactly the same code within developer
without using package, the performance is totally different, and it just
takes only about 3 minutes. The pseudo code is:
insert into tab3 (.......)
with subtab1 as
(select about 27000 rows from tab1, tab2 where join_sth),
subtab2 as
(select *, function_in_the_package_deal_with_Ge... 阅读全帖 |
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g****d 发帖数: 3461 | 45 You can only duplication drives with the same geometry (cylinders, heads,
sectors) by:
dd if=/dev/hda of=/dev/hdb
dd writes device files directly. Unless the partitions are created with
the same geometry (on the same physical cylinders), it should not work.
的 |
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o**n 发帖数: 1249 | 46 很多x下的的程序(xterm,gvim等)都可以 xxx -geometry 80x100之类的改变初始窗口大
小,请问这个怎么变成perminant的呢?我试着在~/.Xresources里加geometry: 80x100
没有作用。应该在哪里改呢?谢谢! |
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T*********r 发帖数: 11175 | 48 【 以下文字转载自 Physics 讨论区 】
发信人: TechniColor (坚决服从rourou的领导), 信区: Physics
标 题: 有SONY READER的用户要SHARE一些HEP的文件吗
发信站: BBS 未名空间站 (Tue Aug 14 23:28:15 2007), 转信
我把TASI LECTURE之类的做了一些
http://www.hep.wisc.edu/~wangkai/tmp/minibook/
重新LATEX过
\documentclass[12pt]{article}
\usepackage{geometry}
\special{papersize=90.00mm,120.00mm}
\geometry{paperwidth=90.00mm,paperheight=120.00mm,margin=0.3cm}
\begin{document}
\large
\textbf
另外如果有FIGURE
都设了 width=1\textwidth |
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b*******h 发帖数: 56 | 49 章节标题离顶部太远,用了无数命令还是不管用,以下为我尝试过的:
1,\oddsidemargin=.4in \textwidth=5.9in \topmargin=-0.5in \textheight=10.0in
\footskip=0.5in
2,\usepackage[left=1.3in, right=1.2in, top=1.0in, bottom=1.0in, includefoot
, headheight=-0.5pt, footskip=0.5in]{geometry}
3,\usepackage{fancyhdr}
\pagestyle{fancy}
\headheight=0pt \headsep=0pt
都解决不了这个问题,用的winEdt。
我又尝试了这个命令,
\usepackage[left=1.3in, right=1.2in, top=0.9in, bottom=1.0in, footskip=0.5in
]{geometry}
这里面的left,right,top,bottom footskip都管用,但是当我尝试加headheigh |
|