U**R
发帖数: 400 | 1 If you read his manuscripts, you would be amazed how great he was. He
even studied turbulence of water flow. Genius is born, not made. |
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c*****5
发帖数: 463 | 2 follow your heart when you have the time :) If you budget well, backpacking
doesn't cost that much. I'm female and have been to over 20 countries in 4
continents by myself. The world is not as turbulent as we see on TV.
People are people, more or less the same every where - living, working and
trying to make a living. Lonely Planet is a must to have. If you've never
backpacked before, maybe can try 2wk-4wk in Asia somewhere and see how you
like it. |
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t******n
发帖数: 2939 | 3 ☆─────────────────────────────────────☆
twistberry (twistberry) 于 (Wed Sep 21 19:36:36 2011, 美东) 提到:
金融行业，女，事业普通，无家庭拖累，没有身份担忧，小有积蓄。
想辞职，环游世界。
以前利用学习，工作假期也去了20来个国家，
但都是时间有限，蜻蜓点水，飞机来去，主要目的地都是大城市。
这次想没有时间限制的出发，一个人去远离城市的历史古迹，去荒凉的沙漠，
去原始丛林，去海上的孤岛，游尽兴了再回来重新找工作。
不过我也有顾虑：比如路途中可能会遇到危险，比如这么一趟可能就会花掉
大部分或者光所有的积蓄，比如回来也不一定能找在短期内找到现在这样的工作。
可是现在不出行，如果将来成了家顾虑就更多了，再过些年人老了身体就会差。
挣扎中，大家有何见解？
☆─────────────────────────────────────☆
wobest (飞啊飞) 于 (Wed Sep 21 19:41:47 2011, 美东) 提到:
follow your heart.
☆─────... 阅读全帖 |
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x****u
发帖数: 12955 | 4
Probably something like "ladies and gentlemen, we have just experienced
severe turbulence. Please fasten your seatbelt and remain calm" |
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d********0
发帖数: 5142 | 5 ☆─────────────────────────────────────☆
tcfbbs (TCF) 于 (Tue Jul 12 14:16:10 2011, 美东) 提到:
看了The Da Vinci Code，特意查了一些关于达芬奇的生平，一看吓一跳，他身兼画家
、文学家、雕塑家、
发明家、哲学家、音乐家、医学家、生物学家、地理学家、建筑工程师和军事工程
师......N职， 而且每一样都是大师的级别。
更不明白的是其所受的教育，14到24岁跟一画家做学徒， 放现在是艺术院校吧，
也就是说， 一个艺术生， 在理工WSN对艺术生最有优越感的领域，而且是众多学科，
取得了WSN们终生无法望其项背的成就
问题是，这有可能吗， 一个人可以有多大的智慧， 在科学专业训练有限的情况下
做到这一切？
是不是有炒作的成分， 他在艺术以外的成就被夸大了， 随便画个草图就成了几百
年后XXX的蓝图了， 再比如 诸葛亮， 同时代和他不相上下的至少有一打吧， 而
只有他成了智慧的化身.
☆─────────────────────────────────────☆
UESR (有意思... 阅读全帖 |
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t******n
发帖数: 2939 | 7 ☆─────────────────────────────────────☆
ColdBody (生当作人杰，死亦为鬼雄) 于 (Sat Apr 7 02:03:31 2012, 美东) 提到:
方励之逝世
方励之（1936 年 2 月 12 日－ 2012 年 4 月 6 日），1936年2月12日生于北京，籍
贯浙江杭州，中国天体物理学家，原中国科学院学部委员，中国科学技术大学原副校长
，美国亚利桑那大学天体物理学教授。
@liunian2012: V-INO: 周五早晨发生的事。他（方励之）正准备去学校上课，临走前
咳嗽一声倒在书房的椅子上就仙去了。周四晚上他还在skype上和我讨论关于宇宙学尺
度上湍流的问题。
☆─────────────────────────────────────☆
Queens (Queens) 于 (Sat Apr 7 02:09:00 2012, 美东) 提到:
享年76岁.
☆─────────────────────────────────────☆
benchmarker (maine) 于 (Sat Apr... 阅读全帖 |
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h*****h
发帖数: 1392 | 8 我觉得谁要是能把CAT（clear air turbulence）给解决了那才是功德一件。坐飞机颠
来颠去的太讨厌，太TMD讨厌了。我听说有些特制的能在上边做外科手术的飞机是抗湍
流的，大家有没坐过？ |
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n****o
发帖数: 2276 | 10 是啊，英雄英雌已经不是前浪后浪而是形成turbulence了。 |
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d*a
发帖数: 1863 | 12 靠
云彩带电根本就是瞎扯
大气科学基本都是猜测
我老板说，以前用飞机在云彩里面采样，分析化学成分，说那些颗粒里面有镍什么的。。
还都发表到nature上了
后来才知道，原来是在高速下，高空中的冰粒与采样仪器碰撞出来的颗粒进入了分析仪
现在还说，云彩里面是highly turbulent, NND要是这么不稳定 我们看到的云彩怎么形
状变的这么慢？ 这么不稳定还能形成这么一大坨。。。。 |
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I****9
发帖数: 5245 | 13 turbulent flow reduces drag! |
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x****o
发帖数: 21566 | 14 http://www.boredpanda.com/giant-war-god-statue-general-guan-yu-sculpture-china/
The statue has just been unveiled in Guan Yu Park in Jingzhou, China. It’s
58 metres (190ft) tall and weighs over 1,320 tonnes, and it contains over 4,
000 strips of bronze. It was designed by Han Meilin, who is probably best
known for his designs of the 2008 Beijing Olympics mascots, and the monument
is so big that there’s even an 8,000sqm museum inside it! Guan Yu lived
during China’s turbulent Three Kingdoms perio... 阅读全帖 |
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H********g
发帖数: 43926 | 15 physicsfunSpinFlo: kinetic art with rheoscopic fluid in a rotating base. The
capsule glides on bearings for long spin times. Visualizing the invisible-
my first physics toy from KickStarter- the creation of artist/inventor
Sergey Anisimov. ➡ Follow the link in my profile for information on
where to get many of the physics toys seen on my stream. #physics #
physicstoy #rheoscopic #rheoscopicfliud #fluiddynamics #turbulence #spinflo
#vortex #angularmomentum #viscosity #kineticart #kineticen... 阅读全帖 |
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f*******y
发帖数: 8358 | 16 科普darcy law
https://bae.okstate.edu/faculty-sites/Darcy/DarcyWeisbach/Darcy-
WeisbachHistory.htm
Henry Darcy and His Law
The History of the Darcy-Weisbach Equation
Glenn Brown
Oklahoma State University
6/7/00
revised 2/21/02
Back to Henry Darcy Main Page
What we call the Darcy-Weisbach equation has had a long history of
development. It is named after two of the great hydraulic engineers of the
middle 19th century, but others have also played a major role. Julies
Weisbach (1806-1871) a native of ... 阅读全帖 |
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f*******y
发帖数: 8358 | 17 不懂还瞎bb，真服了你了。你查了一下wiki就以为全懂了?文盲就是文盲。任何
newtonian fluid通过狭缝，在laminar flow 的情况下流速和pressure gradient 成正
比。这是由受力平衡决定的。所谓的大西定律只是方便记忆的一个说法。不成立的情况
有两种，一是non-newtonian fluid比如高分子，而是出现turbulent flow，这时受力
和shear rate 是非线性的。
: 那句话就是说明那漏水桶的情形不满足 Darcy's law 成立的条件呀。你既然都
知道假
: 设不成立的时候 Darcy's law 自然不成立，还要说不用 Darcy's law 讨论就是
民科，
: 这想法实在够奇葩的。
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t******l
发帖数: 10908 | 18 我觉得这个观点对于这道题不是没有意义的。。。也就是说，小孔足够小的话，水的粘
滞阻力不一定可以忽略。。。虽然水的粘滞系数并不大，但这题是漏斗，也就是说压强
压力也不大。。。所以粘滞就算绝对数值不大，但相对于压力可能也不一定可以忽略。
。。当然具体要看小孔开多大，具体估算才能确定。
：不懂还瞎bb，真服了你了。你查了一下wiki就以为全懂了?文盲就是文盲。任何
：newtonian fluid通过狭缝，在laminar flow 的情况下流速和pressure gradient 成
正比。这是由受力平衡决定的。所谓的大西定律只是方便记忆的一个说法。不成立的情
况有两种，一是non-newtonian fluid比如高分子，而是出现turbulent flow，这时受力 |
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t******l
发帖数: 10908 | 20 想了想，赞成你的这个观点。。。漏斗里的漩涡的 1st order 推动因子应该是动量/转
动惯量的加减速/守恒（看不到转动是因为地球在转动）。。。粘滞力和表面张力是次
要因子。
：turbulent flow是由惯性导致的。 |
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f*******y
发帖数: 8358 | 21 用能量守恒就必须忽略粘滞力。没有粘滞力，在流速不是相同方向，相同大小的情况下
，比然是turbulent flow。这本质是矛盾的。这就是物理规律。怎么算都是错。
: 在这题里，小孔上方如果出现速度和加速度方向大幅度不一致的情况，那就是大
尺度对
: 流的出现。。。因为这个是估算题，杯子里也没有一只龙虾在搅浑水啥的，Z
turn 这
: 种鸡毛蒜皮的贡献忽略不计。。。大尺度 U turn 的出现才是大杀器，而大尺度
U
: turn 就是全局对流。
: ：博努力方程是不能用的。博努力方程是基于laminar flow推导出来的。在小孔是
: ：laminar flow。但是在小孔上方不是laminar flow 。加速度方向和速度方向
如果不
: 一致。博努力公式就不成立了。
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t******l
发帖数: 10908 | 22 你是说在没有粘滞力的情况下，我就没法用一只鸭脚把洗脚桶里的水转成一个漩涡？
：用能量守恒就必须忽略粘滞力。没有粘滞力，在流速不是相同方向，相同大小的情况
下，比然是turbulent flow。这本质是矛盾的。这就是物理规律。怎么算都是错。
： |
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f*******y
发帖数: 8358 | 23 当然不能。没有粘滞力就是一推沙子。
: 你是说在没有粘滞力的情况下，我就没法用一只鸭脚把洗脚桶里的水转成一个漩
涡？
: ：用能量守恒就必须忽略粘滞力。没有粘滞力，在流速不是相同方向，相同大小
的情况
: 下，比然是turbulent flow。这本质是矛盾的。这就是物理规律。怎么算都是错。
: ：
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f*******y
发帖数: 8358 | 24 没看懂你在说什么。你搅水是试图建立laminar flow 吧?难道我理解你的意思错了?你
不会认为搅成一个漩涡就是turbulent flow 了吧?我靠。我觉得你整个把概念都拧巴了。
: 我把电风扇往墙上吹，那风遇到墙的时候还不是要转弯，速度跟加速度的方向不
一致。
: 。。空气的粘滞系数不高吧。。。当然如果是 interstellar 周围啥约束都不存
在，另
: 说。。。
: ：当然不能。没有粘滞力就是一推沙子。
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t******l
发帖数: 10908 | 25 我试图建立加速度矢量方向跟速度矢量方向不一样的 flow。。。这不是你前面说的么
？。。。你说的那些 flow 名词我一个高中生不懂。
：没看懂你在说什么。你搅水是试图建立laminar flow 吧?难道我理解你的意思错了?你
：不会认为搅成一个漩涡就是turbulent flow 了吧?我靠。我觉得你整个把概念都拧巴
了。 |
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f*******y
发帖数: 8358 | 26 我觉得这个话题没必要再讨论下去了。
: 我试图建立加速度矢量方向跟速度矢量方向不一样的 flow。。。这不是你前面
说的么
: ？。。。你说的那些 flow 名词我一个高中生不懂。
: ：没看懂你在说什么。你搅水是试图建立laminar flow 吧?难道我理解你的意思
错了?你
: ：不会认为搅成一个漩涡就是turbulent flow 了吧?我靠。我觉得你整个把概念
都拧巴
: 了。
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p*********l
发帖数: 26270 | 27 1 – 魔镜魔镜我问你
前几个礼拜，我在Love版灌水的时候，有个gg跟我抬杠玩儿，我没看出来，是另一个gg跳出来说：啊哈，男生想让女生注意的法宝之一，就是把她自以为很得意的想法贬得一文不值。
真的么？男生真的经常这么做么？这样做有效果么？引起的注意是positive的么？
从我一个平凡女生的角度来看，这是很铤而走险的一招。
童话里面，白雪公主的后妈每天问魔镜谁是最美丽的女人。你以为她喜欢听到任何跟“是你！是你！”不一样的答案么？
现实里面，大家看看Gilda找到的驸马爷是不是跟她一样的hip hop 小愤青？记得前一阵子班上讨论过一个会古典音乐的优秀男生，咱大公主对他的评价是啥？“优秀强迫症”！不光是不attractive，简直都到了有病的地步啦！后来这位驸马爷难道不优秀么？（我看你敢说不么？咔咔！小心公主抡你~）难道不爱显摆么？（不显摆上youtube干嘛？不显摆各个版面贴个啥？自己偷着乐好了）怎么就一个天上一个地下呢？说到底，那都是因为 –
Birds of a feather flock together。物以类聚！
相同点，让人与人的交流更顺畅拥有更多的话题，让人心里觉得这个... 阅读全帖 |
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j*******1
发帖数: 1533 | 28 那叫borderline personal disorder.
Borderline personality disorder is a condition in which people have long-
term patterns of unstable or turbulent emotions, such as feelings about
themselves and others.
These inner experiences often cause them to take impulsive actions and have
chaotic relationships. |
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b*****y
发帖数: 163 | 29 Troubled Life of Vincent Van Gogh
by Bonnie Butterfield
The 19th century European society of Van Gogh's day was not ready to
accept his truthful and emotionally morbid way of depicting his art
subjects. His internal turbulence is clearly seen in most of his
paintings, which set the stage for the direction of a new style of
painting called Expressionism. It is characterized by the use of
symbols and a style that expresses the artist's inner feelings
about his subject.
Therefore, an understanding |
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c**i
发帖数: 6973 | 30 (1) Matthew Brown, Custer's "Last Flag" sold for $1.9 million. Associated
Press, Dec. 10, 2010.
http://finance.yahoo.com/news/Custers-Last-Flag-sold-for-19-apf-3200805730.html?x=0&.v=2
Note: guidon (n; Middle French, from guide): "a small flag; especially : one
borne by a military unit as a unit marker"
All definitions are from www.m-w.com.
(2) Ellen Gamerman, Stalking a Masterpiece; Collectors are circling one of
the world's most expensive books. A tale of trophy hunters, billionaire
bidders an... 阅读全帖 |
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T*****n
发帖数: 2456 | 31 THE BROTHERS KARAMAZOV
By Fyodor Mikailovich Dostoevsky
Translated by Constance Garnett
Chapter 5
The Grand Inquisitor
https://www.mtholyoke.edu/acad/intrel/pol116/grand.htm
"EVEN this must have a preface- that is, a literary preface," laughed Ivan,
"and I am a poor hand at making one. You see, my action takes place in the
sixteenth century, and at that time, as you probably learnt at school, it
was customary in poetry to bring down heavenly powers on earth. Not to speak
of Dante, in France, cle... 阅读全帖 |
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t***i
发帖数: 216 | 32 嗯。反正多多益善。
你在看格林斯潘的 The Age of Turbulence？
咱们一起看吧。 |
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i***R
发帖数: 663 | 33 虽然不是文学类的，也算是没有荒废这个晚上。一个一个敲上去，打了很多字，还做了不少笔记。
我随便贴贴的，大家千万别浪费功夫。
从图书馆最近借来了格林斯潘的动乱年代。 看了几页觉得很喜欢，甚至有冲动要把它
翻译成中文，不过国内好像没有翻译这本书，呵呵想想而已吧。
就随便摘抄些句子和感想。
p268
While central planning may no longer be a credible form of economic
organization, it is clear that the intellectural battle for its rivvel---
free-market capitalism and globalization is far from won. For twelve
generations, capitalism has achieved one advance after another, as standards
and quality of living have risen at an unprecedented rate over l |
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c**i
发帖数: 6973 | 35 Ian Brunskill, The Story Of a Lifetime; An ordinary German—and compulsive
diarist—lives through Weimar, the Nazi era and the Cold War. Wall Street
Journal, Mar 19, 2011.
http://online.wsj.com/article/SB1000142
4052748704893604576200583943459752.html
(book review on Peter Fritzsche, The Turbulent World of Franz Göll; An
Ordinary Berliner Writes the Twentieth Century. Harvard University Press,
2011)
Note:
(a) German surname Fritzsche/Fritsche/Fritsch is a reduced form of Friedrich
. Franz is ... 阅读全帖 |
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e**o
发帖数: 3389 | 36 age of turbulence by Alan Greenspan |
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s******l
发帖数: 278 | 37 At the age of fifteen, he had already learned silence.
-from "A Child's History of Muad'Dib" by the Princess Irulan
As Paul fought the 'thopter's controls, he grew aware
that he was sorting out the interwoven storm forces, his
more than Mentat awareness computing on the basis of
fractional minutiae. He felt dust fronts, billowings,
mixings of turbulence, an occasional vortex.
The cabin interior was an angry box lighted by the green
radiance of instrument dials. The tan flow of dust outsi |
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f********2
发帖数: 368 | 38 在2005年5月，美国宇航局宣布航海家一號已經在2004年12月，在距離太陽94天文單位
的地方越過終端震波進入日鞘中
2010年12月，旅行者1号已经感受不到太阳风了。
33年的太阳风和行星引力加速，旅行者1号目前是还在工作的速度最快的人造飞行器。
December 13, 2010
PASADENA, Calif. – The 33-year odyssey of NASA's Voyager 1 spacecraft has
reached a distant point at the edge of our solar system where there is no
outward motion of solar wind.
Now hurtling toward interstellar space some 17.4 billion kilometers (10.8
billion miles) from the sun, Voyager 1 has crossed into an area where the
velocity of the hot ionized ga... 阅读全帖 |
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t*n
发帖数: 14458 | 39 会不会把三体人招来
在2005年5月，美国宇航局宣布航海家一號已經在2004年12月，在距離太陽94天文單位
的地方越過終端震波進入日鞘中
2010年12月，旅行者1号已经感受不到太阳风了。
33年的太阳风和行星引力加速，旅行者1号目前是还在工作的速度最快的人造飞行器。
December 13, 2010
PASADENA, Calif. – The 33-year odyssey of NASA's Voyager 1 spacecraft has
reached a distant point at the edge of our solar system where there is no
outward motion of solar wind.
Now hurtling toward interstellar space some 17.4 billion kilometers (10.8
billion miles) from the sun, Voyager 1 has crossed into an area where the
velocity of the hot... 阅读全帖 |
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l***a
发帖数: 5114 | 40 最近翻出阿西莫夫作品全集来重看，真挺有意思的，不仅囊括了他最早期那些名不见经
传的短篇，还有自己写的“创作感想”。看到TRENDS那一篇，居然发现他在1938年（当
时他还在读大学）成功预测成两件事：1）1940年第二次世界大战，2）1970年，人类登
月。
两件事都只差1年而已！
我一直觉得那个SF黄金时期的创作高峰,后来者很难翻越……
下面附TRENDS 的原文。
TRENDS
John Harman was sitting at his desk, brooding, when I entered the office
that day.
It had become a common sight, by then, to see him staring out at the Hudson,
head in
hand, a scowl contorting his face—all too common. It seemed unfair for the
little bantam
to be eating his heart out like that day after day... 阅读全帖 |
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L******N
发帖数: 1858 | 41 I will not forget
By Heidi Isaza, flying home from Santiago, Chile.
For anyone who has never felt a moderate to strong earthquake, it just
dawned on me how much turbulence at 30,000 feet resembles the rocking and
shaking of the earth during an quake or aftershock—without the danger of
the walls falling in on you, of course.
Before I left for Chile, just over two weeks ago, I was one of those people
who didn’t know what a strong earthquake felt like. After two weeks of
frequent and often intens |
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c*********k
发帖数: 4747 | 42 非常weak的correlation,可能是turbulance,我看不出causality |
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G******e
发帖数: 9567 | 43 How many folks know that King James (who commissioned the King James Bible
and to whom it was dedicated) loved men and had sex with them?
A physical weakling, as an adolescent James had shown himself to be a coward
, who liked only to hunt, to read (which he did, prodigiously) and to talk.
To protect himself he wore thick quilted doublets, so padded that they
provided a kind of armor against any assassin who might attack him with a
knife. When he revealed a sexual preference for men, falling in ... 阅读全帖 |
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s*******w
发帖数: 2257 | 44 来自主题: TrustInJesus版 - 聊聊杨小凯 在网上找了一段评论：
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in that generation I truely respect.
I have a lot of sympathy to people
of that generation. Their lives were
destroyed by the Communist party.
But 杨小凯 was an exception. I do not
think that he would get the Nobel prize
if he is still alive. As far as I know,
his research is still not widely accepted
in the academic world. 杨小凯 himself
also talked about the frustration he had.
As an outsider, I also cannot tell whether
his research is indeed so great. But to
me, 杨小... 阅读全帖 |
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S**U
发帖数: 7025 | 45 杀阿罗汉是五无间业之一，后果是生无间地狱。
http://www.accesstoinsight.org/lib/authors/hecker/wheel263.html
These were the circumstances of Moggallana's death.
After the death of Nathaputta, the leader of the ascetic Order of the Jains
(Jinas),[10] there arose among his followers bitter contentions about his
teaching, and consequently there was a loss of devoted adherents and of
support. The Jains had also learned what Moggallana reported from his
celestial travels: that virtuous devotees of the Buddha were seen to h... 阅读全帖 |
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T*******y
发帖数: 6523 | 46 hehe, yours seems moving, but when we look at it, it does not move.
Both images show that the peace is in the center of cyclones. However
turbulent is there outside, the peace is inside. |
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w***e
发帖数: 1331 | 47 如果你是 CFD and turbulent (liquid) mixing expert, 熟练使用 Fluent, 今年夏天
6-8月有兴趣在东部大药厂实习, 请在下周二(Feb. 12)之前站内发信联系我。 |
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s***u
发帖数: 28 | 48 Ge-Cheng Zha, Ph.D. (BS 83; MS 86 - NPU)
Associate Professor
University of Miami
(Aerodynamics, Aeropropulsion, Turbomachinery Flight Mechanics, Turbulence,
Simulation, Computational Fluid Dynamics) |
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