a*****y
发帖数: 33185 | 1 第二章 存在与不存在
宇宙可有开端？
开天辟地观念是所有宗教与科学的根本。声明宇宙连同时间和空间起源于一百五十
亿年前的“大爆炸论”[1]，是说明宇宙形成的最佳科学解释。佛教对这问题的说法则
大不相同，主张原初开端的观念是错误的，认为我们这个世界乃是无量大千世界的一环
。究竟这“大爆炸”真是原初的爆炸，还是无始亦无终的无尽量宇宙中一个特定宇宙的
开端？时间和宇宙开端的观念是否有根本上的缺失？
郑：就目前所知，“大爆炸”是最能解释宇宙的源起的理论。我们认为，宇宙创生
于一百五十亿年前左右，当时有一难以想像的微小、致密和集热的能量急速膨胀，过程
中同时也形成时间和空间。
自此以后，宇宙即不断膨胀。美国天文学家哈伯在一九二九年观察到，绝大部分的
星系都以极高速度离开我们的银河系，于是理论成型。更奇特的是，距离越远的星系，
移动速度越快；十倍距离外的星系，移动速度也快上十倍。科学家从哈伯观察中推测，
所有星系都是同时从起始点移动到目前的位置。现在，我们不妨想像有一部影片拍到星
系在宇宙中各自散开，一倒带便可发现，所有星系都循着原路，在同一时间会合在太空
中的同一点上。这种见解衍生出大爆炸形成膨... 阅读全帖 |
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b****u
发帖数: 1 | 2 Ladies and Gentlement,
How would the visa interviewer know I dropped out of the Ph.D program
in China? How can I make this history unknown to him/her?
Thinks in advance for you help!
Bondy |
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b*s
发帖数: 82482 | 3 4. I've heard conflicting information about how many fans the iMac has -
some say none, some say one, some say two. What's the real story?
The iMac has one main fan, which sucks air in from beneath the system and
blows it upwards over the internal components and out the top. Because
Steve Jobs is known to dislike fan noise* and because the Bondi-blue top of
the iMac's enclosure has holes that look like they were intended for
ventilation, some people thought the system would not have a fan. They |
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i*******n
发帖数: 166 | 5 发信人: bfel (Jin), 信区: Physics
标 题: Thomas Gold: 1920--2004
发信站: Unknown Space - 未名空间 (Wed Jun 23 17:14:54 2004) WWW-POST
Thomas Gold, the controversial US-based astronomer and geoscientist, died
yesterday in Ithaca, New York, at the age of 84. Gold is best known for
developing, along with Hermann Bondi and the late Fred Hoyle, the steady-state
theory of the universe. It assumes that we live in a world that has no
beginning or end, in which matter is constantly being created. Although the
theory |
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l**********1
发帖数: 5204 | 6 No ,all might relative to Galois his Group Theory
//en.wikipedia.org/wiki/évariste_Galois
within Math/Systems/Synthetic Biology/ deeper data mining mining....
please refer Google Book:
//www.scribd.com/doc/18944496/Graph-Theory-Bondy
or paper:
//assets.cambridge.org/97805218/02307/frontmatter/9780521802307_frontmatter.pdf
more references:
a)
//www.ncbi.nlm.nih.gov/pubmed/21991994
Fozard JA, Kirkham GR, Buttery LD, King JR, Jensen OE, Byrne HM.
Techniques for analysing pattern formation in popula... 阅读全帖 |
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a****t
发帖数: 1532 | 7 D.West的，或者Diestel的，或者bondy的 |
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a****t
发帖数: 1532 | 8 D.West的那本稍微容易读一些。
如果只需要一些最基本的概念，定理之类的，老版本bondy的书（78版好像）挺好。 |
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y****d
发帖数: 432 | 9 【7】【Springer】GTM美国研究生数学书籍全集
LIST：
1 Introduction to Axiomatic Set Theory, Gaisi Takeuti, W. M. Zaring
2 Measure and Category, John C. Oxtoby
3 Topological Vector Spaces, H.H. Schaefer, M.P. Wolff
4 A Course in Homological Algebra, Peter Hilton, Urs Stammbach
5 Categories for the Working Mathematician, Saunders Mac Lane
6 Projective Planes, Hughes, Piper
7 A Course in Arithmetic, Jean-Pierre Serre
8 Axiomatic Set Theory, Gaisi Takeuti, Zaring
9 Introduction to Lie Algebras and Representation The... 阅读全帖 |
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i*****s
发帖数: 15215 | 11 这组照片是Boston Globe的照片专题The Big Pictures里的一个主题，照片都很精彩，
本帖后面有链接。
Animals and their people
We keep them as pets, although which species maintains the upper paw in that
relationship is sometimes in doubt. We drive them to the brink of
extinction, and then make desperate attempts to bring them back. We tend
them as livestock, display them in zoos, and research them in labs and in
the wild. Our lives are intertwined with those of animals, and better for
it. Gathered here are images of that furry in... 阅读全帖 |
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w*******y
发帖数: 60932 | 12 "For the first time ever, own a DVDbased, searchable digital archive
containing Playboy magazine's entire groundbreaki ng first decade--every
issue--every page--cover to cover. This exclusive box set also comes with a
224page companion coffee table book chronicling the behind-the-scenes
history of Playboy. Plus as a special bonus--a newly printed reissue is
included of the extremely rare first issue, featuring Marilyn Monroe!"
Use the link provided from philli97 (!)
Link:
http://btob.barnesandn... 阅读全帖 |
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i*******n
发帖数: 166 | 13 发信人: bfel (Jin), 信区: Physics
标 题: Thomas Gold: 1920--2004
发信站: Unknown Space - 未名空间 (Wed Jun 23 17:14:54 2004) WWW-POST
Thomas Gold, the controversial US-based astronomer and geoscientist, died
yesterday in Ithaca, New York, at the age of 84. Gold is best known for
developing, along with Hermann Bondi and the late Fred Hoyle, the steady-state
theory of the universe. It assumes that we live in a world that has no
beginning or end, in which matter is constantly being created. Although the
theory |
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