b*s
发帖数: 82482 | 1 莱特兄弟的方式叫做Wing Warping:
http://en.wikipedia.org/wiki/Wing_warping
现在普遍流行的飞行控制面，参见
http://en.wikipedia.org/wiki/Flight_control_surfaces
The main control surfaces of a fixed-wing aircraft are attached to the
airframe on hinges or tracks so they may move and thus deflect the air
stream passing over them. This redirection of the air stream generates an
unbalanced force to rotate the plane about the associated axis.
纠正你一下：“一种”是“一直”，我读了好几遍，哈哈。欧洲搞出hinged control
surface的？是怎么控制的？wright brothers的机翼是什么材料啊... 阅读全帖 |
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l****f
发帖数: 332 | 2 http://www.nytimes.com/2011/12/19/us/politics/retirement-deal-k
Buyout Profits Keep Flowing to Romney
Almost 13 years ago, Mitt Romney left Bain Capital, the successful private
equity firm he had helped start, and moved to Utah to rescue the Salt Lake
City Olympic Games and begin a second career in public life.
Yet when it came to his considerable personal wealth, Mr. Romney never
really left Bain.
In what would be the final deal of his private equity career, he negotiated
a retirement agreemen... 阅读全帖 |
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l******2
发帖数: 2994 | 3 Don't Become a Scientist!
Jonathan I. Katz
Professor of Physics
Washington University, St. Louis, Mo.
[my last name]@wuphys.wustl.edu
Are you thinking of becoming a scientist? Do you want to uncover the
mysteries of nature, perform experiments or carry out calculations to learn
how the world works? Forget it!
Science is fun and exciting. The thrill of discovery is unique. If you are
smart, ambitious and hard working you should major in science as an
undergraduate. But that is as far as you shoul... 阅读全帖 |
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h***e
发帖数: 20195 | 4 【 以下文字转载自 Military 讨论区 】
发信人: gc01 (gc01), 信区: Military
标 题: 李克强的弟弟也被曝了-烟草局局长ZTbloomberg
发信站: BBS 未名空间站 (Fri Oct 26 00:47:38 2012, 美东)
http://www.bloomberg.com/news/2012-10-25/china-leader-s-job-at-
China Leader’s Job at Odds With Tobacco Ties, Brookings Says
By Bloomberg News - Oct 25, 2012 3:24 PM ET
The brother of Chinese Vice Premier Li Keqiang, who oversees public health,
should be removed from his post as a top official in China’s state-owned
tobacco monopoly to avoid conflicts of interes... 阅读全帖 |
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S*********g
发帖数: 24893 | 5 【 以下文字转载自 USANews 讨论区 】
发信人: StephenKing (金博士), 信区: USANews
标 题: 真正的美国新闻：让美国蒙羞的新闻
发信站: BBS 未名空间站 (Thu Feb 7 23:51:09 2013, 美东)
From: Christopher Jordan Dorner /7648
To: America
Subj: Last resort
Regarding CF# 07-004281
I know most of you who personally know me are in disbelief to hear from
media reports that I am suspected of committing such horrendous murders and
have taken drastic and shocking actions in the last couple of days. You are
saying to yourself that this is completely out of chara... 阅读全帖 |
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R*2
发帖数: 225 | 6 Charity fraud is a deliberate act of deception committed by an individual or
a group of individuals who solicit donations in the name of a worthy cause.
Perpetrators of charity fraud typically use high-pressure methods to
convince donors to give. They sometimes take advantage of a tragic event or
a sad predicament to appeal to the compassion and empathy of donors. Victims
of charity fraud are usually well-intentioned individuals who either fail
to, or do not know how to, verify the legitimacy of... 阅读全帖 |
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G****e
发帖数: 11198 | 7 【 以下文字转载自 Arizona 讨论区 】
发信人: stxyz (xy), 信区: Arizona
标 题: ABC15 report
发信站: BBS 未名空间站 (Sat Nov 9 23:26:22 2013, 美东)
http://www.abc15.com/dpp/entertainment/movies/protesters-appear
PHOENIX - Protesters appeared outside the studios of ABC affiliates across
the country Saturday responding to a segment on the late-night show, "Jimmy
Kimmel Live."
The protests are in reaction to a segment called "Kids Table" that aired on
Jimmy Kimmel's show on Oct. 16.
During the segment, Kimmel asks a group of bo... 阅读全帖 |
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b*s
发帖数: 82482 | 8 想了一下，旗子对于箭矢的防护还在于obscure target和deflect the projectile两方
面吧。
感觉是阻碍狙击手视线的。那个旗子的防护力感觉不强。
另外，大将在冲锋陷阵时不方便拿旗子，叫手下拿着冲散了更麻烦，古时战场上旗子一
到，军队崩溃的事可不少。干脆自己绑在背后，是告诉手下我的旗在那，你就和我冲向
那，小兵背小旗，要么是传令兵，要么是传警报的驿卒 |
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b*s
发帖数: 82482 | 9 Riding my bike in the rain. The visor of the helmet deflected the raindrops
intended for my corneas, left my vision undistorted for the big garbage
truck blocking the lane, although the reeking malodor tipped me off two
blocks away.
Riding a bike in the rain reminds me of my younger years in China, sans the
fancy helmet and the gear-shifting device on the bike, although I rarely use
the lower gears, my muscle can pump enough power to sustain prolonged
uphill inclination.
The kinesthetic experien... 阅读全帖 |
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l******m
发帖数: 31446 | 10 这是第二篇。时隔10个月。
http://www.mitbbs.com/article_t/WebRadio/31258549.html
发信人: bos (Bart), 信区: WebRadio
标 题: Morning Rain
发信站: BBS 未名空间站 (Thu Jun 5 09:36:20 2014, 美东)
Riding my bike in the rain. The visor of the helmet deflected the raindrops
intended for my corneas, left my vision undistorted for the big garbage
truck blocking the lane, although the reeking malodor tipped me off two
blocks away.
Riding a bike in the rain reminds me of my younger years in China, sans the
fancy helmet and the gear-s... 阅读全帖 |
|
a******o
发帖数: 16625 | 11 【 以下文字转载自 Military 讨论区 】
发信人: LindaLiao (梅影清吟), 信区: Military
标 题: 世界历史上最有成就的五十名物理学家。
发信站: BBS 未名空间站 (Sun Apr 8 17:18:35 2012, 美东)
1. Isaac Newton - English. Quantified and Qualified laws of motion and
gravity. Invented the reflecting telescope. Explained the concept of light
dispersion and co-invented the Calculus.
2. Albert Einstein - German/Swiss/American - Developed Theories of Special
and General Relativity. Described Brownian Motion. Nobel Prize winner for
his work on the photoelectric ef... 阅读全帖 |
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H********g
发帖数: 43926 | 12 【 以下文字转载自 Military 讨论区 】
发信人: YangCN (老杨), 信区: Military
标 题: Don't Become a Scientist!
发信站: BBS 未名空间站 (Thu Sep 18 14:24:53 2014, 美东)
写的相当诚恳，应该广泛贴到国内的留学论坛上去。
http://physics.wustl.edu/katz/scientist.html
Jonathan I. Katz
Professor of Physics
Washington University, St. Louis, Mo.
[my last name]@wuphys.wustl.edu
Are you thinking of becoming a scientist? Do you want to uncover the
mysteries of nature, perform experiments or carry out calculations to learn
how the world works? Forget it!
Science is f... 阅读全帖 |
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a**r
发帖数: 5444 | 13 nice :)
and i like this one too:
“There are, it seems, two muses: the Muse of Inspiration, who gives us
inarticulated visions and desires, and the Muse of Realization, who
returns again and again to say “It is yet more difficult than you
thought.” This is the muse of form. It may be then that form serves us
best when it works as an obstruction, to baffle us and deflect our
intended course. It may be that when we no longer know what to do, we
have come to our real work and when we no longer k |
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f*****o
发帖数: 113 | 14 i thought there were only 4 death eaters except Snape and Draco bah...
3 flee, 1 killed by their own deflected AK |
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T*******e
发帖数: 195 | 15 单挑James之流根本不是Snape对手，James他们从来都是四个一起上的。
看下面这段:
"Incarc-"Harry roared, but Snape deflected the spell with an almost lazy
flick of his arm.
"Fight back!" Harry screamed at him. "Fight back, you cowardly-----"
"Coward, did you call me, Potter?" shouted Snape. "Your father would never
attack me unless it was four on one, what would you call him, I wonder?" |
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D*****r
发帖数: 6791 | 16 ok, how about this one?
One day God, Jesus and Moses are playing a round of golf. Jesus and Moses
have both hit respectable 250+ yard drives on a par 4 with abundant water
hazards.
God takes his hit; lots of power in the stroke but he hooks badly, and the
ball soars toward a deep pond. As it hits the surface, a trout rises beneath
it to take a fly; the ball bounces off its head and deflects into the rough
. A rabbit which was grazing peacefully there sees the ball land beside him,
picks it up in... 阅读全帖 |
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l*****a
发帖数: 38403 | 17 Many denominational Christians and even church leaders are under the
mistaken belief that Jesus was a Jew. But nothing could be further from the
truth.
Judea and Galilee were two separate states and political entities, as
illustrated on the map of Palestine in the time of our Saviour in your Bible
. Jesus Himself was not a Jew (Judean) or resident of Judea, He was a
Galilean or resident of Galilee (Matthew 26:69; John 7:41), and a Judahite
or descendent of the Tribe of Judah. The Judeans of prom... 阅读全帖 |
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g*****g
发帖数: 45 | 18 Suppose you do eventually obtain a permanent job, perhaps a tenured professorship. The
struggle for a job is now replaced by a struggle for grant support, and again there is a glut of
scientists. Now you spend your time writing proposals rather than doing research. Worse,
because your proposals are judged by your competitors you cannot follow your curiosity, but
must spend your effort and talents on anticipating and deflecting criticism, rather than on
solving the important scientific problems. |
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s*****o
发帖数: 22187 | 19 赢了！
1:0
居然不是deflection? 那就太牛了！ |
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a*****i
发帖数: 4391 | 20
butterfly is an interactive compiled Lisp function in `misc.el'.
(butterfly)
Use butterflies to flip the desired bit on the drive platter.
Open hands and let the delicate wings flap once. The disturbance
ripples outward, changing the flow of the eddy currents in the
upper atmosphere. These cause momentary pockets of higher-pressure
air to form, which act as lenses that deflect incoming cosmic rays,
focusing them to strike the drive platter and flip the desired bit.
You can type `M-x butterfly |
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y*******e
发帖数: 12 | 21 请问各位高手：
什么图像分析的软件可以测量梁(beam)的弯曲度变化,或是deflection的变化，是stk/
tiff文件,梁在形变的时候也有面内转动，形变其实挺小挺不好量的，实在不想打印出
来妙在坐标纸上手动来做，一个stk文件就够得我受的啦
找到的一些软件都不可以在原图像上取多个点，来模拟这个梁，再对其做处理获取数据
谢谢 |
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l**d
发帖数: 472 | 22 又不是现在才这样，只不过Nature出了专刊而已。单独的文章在Science，Nature上一
直都有。99年就有教授写了不要做科研的文章。那片文章很多人都读过吧？再贴一次to
freshen memory
http://wuphys.wustl.edu/~katz/scientist.html
Don't Become a Scientist!
Jonathan I. Katz
Professor of Physics
Washington University, St. Louis, Mo.
[my last name]@wuphys.wustl.edu
Are you thinking of becoming a scientist? Do you want to uncover the
mysteries of nature, perform experiments or carry out calculations to learn
how the world works? Forget it!
Science is fun and exciting. The thrill ... 阅读全帖 |
|
T****i
发帖数: 15191 | 23 我以前就说过，差距很小的statistical significance 很可能不是biological
significance。下面这个例子说的很明白：
Critics also bemoan the way that P values can encourage muddled thinking. A
prime example is their tendency to deflect attention from the actual size of
an effect. Last year, for example, a study of more than 19,000 people
showed8 that those who meet their spouses online are less likely to divorce
(p < 0.002) and more likely to have high marital satisfaction (p < 0.001)
than those who meet offline (see Nature http://d... 阅读全帖 |
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r*******p
发帖数: 130 | 24 popper & sons. inc 公司出的，我用的是：deflected point non coring septum
penetration needles |
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y*******o
发帖数: 746 | 25 一个HR发给我的，我觉得自己不够格，版上有人感兴趣就投简历吧。
If you are interested in the position, feel free to place your “bid” on
line: www.careers.jnj.com and search for the requisition by using the
number – 7217110506
PRINCIPAL ENGINEER (POLYMERS) ADVANCED PROCESS (7217110506) at Biosense
Webster Inc.
Job Description
Biosense Webster, a member of Johnson & Johnson's Family of Companies, is
recruiting for a Principal Engineer, Advanced Process, located in Irwindale,
CA.
Biosense Webster, Inc. is recognized worldwide as... 阅读全帖 |
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y*******e
发帖数: 12 | 26 请问各位高手：
什么图像分析的软件可以测量梁(beam)的弯曲度变化,或是deflection的变化，是stk/
tiff文件,梁在形变的时候也有面内转动，形变其实挺小挺不好量的，实在不想打印出
来妙在坐标纸上手动来做，一个stk文件就够得我受的啦
找到的一些软件都不可以在原图像上取多个点，来模拟这个梁，再对其做处理获取数据
谢谢 |
|
d********y
发帖数: 1141 | 27 1)
Given soil site class : D
Seismic design catergory: D
Sds=0.49
W = known
T=0.04
What is V?
2) given occupancy classification
Ss=1.5
S1=1
Site classification: B
W is known
T=1
Min CBC seismic design load force=?
3) CBC requires special inspection of the 2 story includes the additional
inspection of the concrete placement of?
4) interior steel
Fv
deflection 8"
An exterior wall system
What is the drift?
5) initial structure damage is ?
7) most common failure pre1970 is what?
★ 发自iPhone App: Ch... 阅读全帖 |
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d********y
发帖数: 1141 | 28 1)
Given soil site class : D
Seismic design catergory: D
Sds=0.49
W = known
T=0.04
What is V?
2) given occupancy classification
Ss=1.5
S1=1
Site classification: B
W is known
T=1
Min CBC seismic design load force=?
3) CBC requires special inspection of the 2 story includes the additional
inspection of the concrete placement of?
4) interior steel
Fv
deflection 8"
An exterior wall system
What is the drift?
5) initial structure damage is ?
7) most common failure pre1970 is what?
8) snow load
Wind l... 阅读全帖 |
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a****r
发帖数: 89 | 29 纯粹技术讨论：如果deflection too large to meet code limit, what can you do
without increase section?
★ 发自iPhone App: ChineseWeb 8.1 |
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b*******g
发帖数: 1095 | 30 Deflection of what? Concrete beam? How about doublely reinfoced section? or
prestressed/posttensioned? |
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a****r
发帖数: 89 | 31 已经是post-tension flat plate, because span to thickness ratio exceeds code
recommend, deflection exceeds L/240
★ 发自iPhone App: ChineseWeb 8.1 |
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z******i
发帖数: 5114 | 32 我不会让厚度小于规范 recommend, 因为一旦出事了你很难justify 你这个决定，尤其
deflection 也不满足规范要求
这个情况建议至少做到规范推荐的最低板厚
code
★ 发自iPhone App: ChineseWeb 7.8 |
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z******i
发帖数: 5114 | 33 Should not 可能不能作为mendatory 的要求，但是同时deflection也不能达到规范要
求就很能说明板厚不够的问题了。
★ 发自iPhone App: ChineseWeb 7.8 |
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a****r
发帖数: 89 | 34 Designer tried to push everything to limit.
Long term deflection is a grey area. |
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a****r
发帖数: 89 | 35 比如你如何确定long term deflection factor use for computer model?
Regular structure is 3, but for those structure in extreme span- thickness
ratio, should I allow designer use 3? ACI 290 recommend 2-5.15
★ 发自iPhone App: ChineseWeb 8.1 |
|
a****r
发帖数: 89 | 36 ACI 435R-95 apply to PT. It mentions deflection factor too.
★ 发自iPhone App: ChineseWeb 8.1 |
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r*****j
发帖数: 7481 | 37 比较不同意。
土木涉及到了defense system就没有你想的这么简单了。
比如你给一个实验室设计一个电子干扰的地基，而且仪器是16k rev/s，客户要求地基
的deflection控制在0.1%。 |
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r***y
发帖数: 248 | 38 我没有真正干过土工就转专业的，算半个行内人，
你可以歧视我没有PE，SE，
但不可以歧视我的智商，
你可以歧视我的智商，
但不可以歧视我的胸器，
这个部件讲究size & elasticity
论deflection,stiffness,elastic modulus
两娃大妈和未婚女差别大了去了，
你有什么资格拿我的胸器说事？
我彻底闪...... |
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bd
发帖数: 21 | 39 According to nonlinear:
There are three kinds of nonlinear problems.
The first one is nonlinear elasticity.Thats to say, the material is
nonlinear.The most famous solution is the deformation of a rubber under
lateral pressure. I once found this solution in a chinese book.
The second one is geometric nonlinear. The most famous solution in
elasticity is the deflection of a thin plate.( Qian weichang did much work in
this field)
The third one is contact nonlinear. The most famous solution |
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j***j
发帖数: 324 | 40 opamp 可以去cirrus logic 看看，他们有一些高压的器件是给motion，deflection或
者做保护用的。
那个三端稳压器，感觉即使有这样的器件也不应该这么用。
效率太低，散热也不好做，估计散热片成本就很高。
不如用dcdc降压以后在用linear regulator，
或者如果noise rejection 要求很高，可以用电阻分压以后再加linear regulator。 |
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f*********e
发帖数: 71 | 41 I know papers about large delfections of plate, rather than membrane?
It is an old topic. |
|
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t******d
发帖数: 376 | 43 No idea. is it your research topic? Large deformation problems are hard to
see.
Please |
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g*******g
发帖数: 1164 | 44 【 以下文字转载自 Military 讨论区 】
发信人: YangCN (老杨), 信区: Military
标 题: Don't Become a Scientist!
发信站: BBS 未名空间站 (Thu Sep 18 14:24:53 2014, 美东)
写的相当诚恳，应该广泛贴到国内的留学论坛上去。
http://physics.wustl.edu/katz/scientist.html
Jonathan I. Katz
Professor of Physics
Washington University, St. Louis, Mo.
[my last name]@wuphys.wustl.edu
Are you thinking of becoming a scientist? Do you want to uncover the
mysteries of nature, perform experiments or carry out calculations to learn
how the world works? Forget it!
Science is f... 阅读全帖 |
|
