发帖数: 1 | 1 橡树岭国家实验室散裂中子源诚招有物理和计算背景的博后。
课题为运用高性能计算增强非弹性散射中子谱仪的分辨率。年薪约$65k。
https://recruiting.ornl.gov/sap/bc/webdynpro/sap/zornl_hrrcf_c_post_doc?sap-
language=EN&sap-client=010#
Job Posting Title
Postdoctoral Research Associate in Super-Resolution Inelastic Neutron
Scattering
Purpose
The Neutron Sciences Directorate (NScD) at Oak Ridge National Laboratory (
ORNL) operates the High Flux Isotope Reactor (HFIR), the United States'
highest flux reactor based neutron source, and the Spallation Neutron Source
(... 阅读全帖 |
|
发帖数: 1 | 2 橡树岭国家实验室散裂中子源诚招有物理和计算背景的博后。
课题为运用高性能计算增强非弹性散射中子谱仪的分辨率。年薪约$65k。
https://recruiting.ornl.gov/sap/bc/webdynpro/sap/zornl_hrrcf_c_post_doc?sap-
language=EN&sap-client=010#
Job Posting Title
Postdoctoral Research Associate in Super-Resolution Inelastic Neutron
Scattering
Purpose
The Neutron Sciences Directorate (NScD) at Oak Ridge National Laboratory (
ORNL) operates the High Flux Isotope Reactor (HFIR), the United States'
highest flux reactor based neutron source, and the Spallation Neutron Source
(... 阅读全帖 |
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T**********r
发帖数: 1223 | 3 http://web.stratfor.com/images/writers/CHINA_RARE_EARTH_ELEMENTS.pdf?fn=9617327557
China and the Future of Rare Earth Elements
October 14, 2010
clip_image002
STRATFOR
PDF Version
* Click here to download a PDF of this report
A recent diplomatic spat between China and Japan has heightened territorial
tensions and called attention to China’s growing forcefulness with foreign
powers. One of the more intriguing aspects of this development was China’s
suspension of the export of “rare ea... 阅读全帖 |
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T**********r
发帖数: 1223 | 4 【 以下文字转载自 Military 讨论区 】
发信人: TradeSmarter (Smarter), 信区: Military
标 题: 国人之愚蠢，看看这个稀土报告就知道了
发信站: BBS 未名空间站 (Thu Oct 14 22:22:08 2010, 美东)
http://web.stratfor.com/images/writers/CHINA_RARE_EARTH_ELEMENTS.pdf?fn=9617327557
China and the Future of Rare Earth Elements
October 14, 2010
clip_image002
STRATFOR
PDF Version
* Click here to download a PDF of this report
A recent diplomatic spat between China and Japan has heightened territorial
tensions and called attention to China’s growing... 阅读全帖 |
|
T**********r
发帖数: 1223 | 5 【 以下文字转载自 Military 讨论区 】
发信人: TradeSmarter (Smarter), 信区: Military
标 题: 国人之愚蠢，看看这个稀土报告就知道了
发信站: BBS 未名空间站 (Thu Oct 14 22:22:08 2010, 美东)
http://web.stratfor.com/images/writers/CHINA_RARE_EARTH_ELEMENTS.pdf?fn=9617327557
China and the Future of Rare Earth Elements
October 14, 2010
clip_image002
STRATFOR
PDF Version
* Click here to download a PDF of this report
A recent diplomatic spat between China and Japan has heightened territorial
tensions and called attention to China’s growing... 阅读全帖 |
|
t*****e
发帖数: 224 | 6 Makes sense.
One minor thing, "monopoly" is not a right word. I think what you really mean
by monopoly is market power. And it is the inelasticity of demand for the gas
that gives the retailers the market power. And one thing you are wrong about
is, price is always determined by supply and demand. It is the peculiarity
(inelasticity within certain range) of demand that causes all the problem, or,
the interesting puzzle.
The revised version of your "assumption": Inelasticity of demand, which cau |
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t*****r
发帖数: 2 | 7 Secondary electrons means those electrons undergoing inelastic scattering with
the solid and lost the character energy. For Auger electrons or electrons
produced in photoemission process, the emitting energy is well defined if no
inelastic scattering happens. However, if they have some inelastic scattering
when travelling through the sample, the kinetic energy then is not well
defined and they become secondary electrons. |
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l****z
发帖数: 29846 | 8 “We Can’t Just Drill Our Way To Lower Gas Prices”…Turns out we can
Anyone over twenty five years old probably remembers the left’s rebuttal
during President George W. Bush’s initiative to drill in ANWAR, “We Can’t
Just Drill Our Way To Lower Gas Prices”. In fact as recently as 2012
President Obama was still parroting, after ten years, what had become Gospel
on the left. “We Can’t Just Drill Our Way to Lower Gas Prices” or a
variation “We Can’t Drill Our Way to Prosperity”. It was also said, b... 阅读全帖 |
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t*******s
发帖数: 492 | 9 Trickle up vs trickle down. A legitimate and gentle increase of cost across
board is a way to "shock" the dying economy, introduce mild inflation and
encourage investment activity (which may or may not eventually lead to great
innovation and lead to real growth). Also, keep in mind: this increase of
cost is really flat as a whole. The nominal increase of cost is really
offset by the nominal gain for income. But the goal here is NOT to create
wealth directly. The goal is to shock and trickle up.
... 阅读全帖 |
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t*******h
发帖数: 2882 | 10 大意：
世界粮农组织警告，中国干旱将迫使世界最大小麦生产者（中国）大量进口谷物，使得
市场价格创纪录的攀升。
埃及起义的根本原因，是中国：亚洲的繁荣造成了对谷物的空前需求。
40%的埃及人每天生活费低于2刀--甚至比加沙地带的人害穷。
食品的上涨加重了埃及人对现政权的不满。
埃及不能像中国在1949年一样搞土改，一切已经太晚了。
http://www.atimes.com/atimes/Middle_East/MB10Ak02.html
Chinese weather on Tahrir Square
By Spengler
The late novelist James Clavell had a tiresome habit of driving the plots of
his potboilers into cul-de-sacs, whence he would extricate them with a
natural disaster.
Egypt had its Clavell moment on February 8 when the Food and Agricul... 阅读全帖 |
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w*******r
发帖数: 7276 | 11 【 以下文字转载自 SanFrancisco 讨论区 】
发信人: wildtiger (wildtiger), 信区: SanFrancisco
标 题: MIT male:female=53%:47%, 录取率女生是男生三倍
发信站: BBS 未名空间站 (Tue Aug 20 11:04:45 2013, 美东)
Almost 12 hours on CC/etc today and still going strong!!
A few of you, in different threads, have asked for some statistics about
this year's admissions process. I don't have many of the specifics y'all
want (i.e. what percentage of USAMO varsity athlete valedictorians with
Intel awards from Iberia), but here are some general numbers so... 阅读全帖 |
|
m*********a
发帖数: 3299 | 12 Jews .2% of world population, 20% of all Nobel prices, 40% of USA nobel
price, won more than 160 nobels.
All Asian are junk compare to Jewish people in your standard.
Literature[edit source | edit]
Year Laureate Country Rationale
1927 Bergson-Nobel-photo.jpg Henri Bergson[9][10] France "in
recognition of his rich and vitalizing ideas and the brilliant skill with
which they have been presented"[11]
1958 Boris Pasternak cropped.jpg Boris Pasternak[9][10] Sov... 阅读全帖 |
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l********7
发帖数: 1077 | 13 首先你小车的能量损失算错了
让我来描述这个物理问题
Assume:
1. m1=2m, m2=m, V1=V, V2=-V
2. it is a perfectly inelastic collision:
m1V1+m2V2=(m1+m2)v'
=>v'=V/3
3. the kinetic energy loss of the system is exclusively due to the
deformation of small car and the big car is perfect after the collision
find:energy loss of the system:
E_loss=0.5*2m*v^2+0.5*m*v^2-0.5*3m*(1/3v)^2=1.333mv^2
如果小车以2v的速度撞墙
energy loss of the system:
E_loss= 0.5*m*(2v)^2=2mv^2
显然撞大车比撞墙更划算 |
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T******o
发帖数: 136 | 14 basic concept of price elasticity: job keepers are inelastic, job switchers
are elastic. gotta give elastic ppl a better deal to attract them |
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w*******r
发帖数: 7276 | 15 【 以下文字转载自 SanFrancisco 讨论区 】
发信人: wildtiger (wildtiger), 信区: SanFrancisco
标 题: MIT male:female=53%:47%, 录取率女生是男生三倍
发信站: BBS 未名空间站 (Tue Aug 20 11:04:45 2013, 美东)
Almost 12 hours on CC/etc today and still going strong!!
A few of you, in different threads, have asked for some statistics about
this year's admissions process. I don't have many of the specifics y'all
want (i.e. what percentage of USAMO varsity athlete valedictorians with
Intel awards from Iberia), but here are some general numbers so... 阅读全帖 |
|
o********e
发帖数: 34 | 16 【 以下文字转载自 Physics 讨论区 】
发信人: olivertree (Life is good), 信区: Physics
标 题: research scientist position at NIST (open for all nationalities)
发信站: BBS 未名空间站 (Mon Mar 17 16:54:23 2014, 美东)
The Macromolecular and Microstructure Sciences (MMS) team at the NIST Center
for Neutron Research (NCNR) is seeking a research scientist with a strong
record of creativity and achievement in any area of nano and microscale
science or instrumentation science. The candidate should complement and
expand current scien... 阅读全帖 |
|
P*C
发帖数: 6109 | 17
先搞清楚什么是刚需再进来扯什么理论 刚需是不管价格怎么变，需求量都基本不变。
知道什么是 刚 不？ rigid, inelastic.
钱印多了当然要投资，炒这个炒那个，这个我一直都同意 ，只是不要往什么住房刚需
上扯，而且这个也不叫什么刚需，经济学基础学明白了再出来学经济学家扯淡。 |
|
P*C
发帖数: 6109 | 18 “刚需的意思是价格越高，需求越高。”
“国内的刚需确实特别强劲。 不仅是住房需要的刚需， 而且是投资需要的刚需。
有钱人每年赚那么多钱， 放哪儿？ 肯定还是选房子啊。 在被证明是错的之前，
就一直是对的。 所以， 目前还是正确的。 ”
刚 的意思，rigid, inelastic. 不随价格明显变化的需求才叫刚需！ |
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n******h
发帖数: 2482 | 19 No idea. Anything is possible.
QE3 by October. No idea about the equity/bond market. Could collapse but
never underestimate the stupidity and craziness of the central banks.
期。
+1
+1 if we don't get hyper-inflation
You are being too conservative.
+1. Agriculture demand is very inelastic.
It's a given. Inflation in China will accelerate. It's no longer an economic
problem for China, but a political one. |
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n******h
发帖数: 2482 | 20 The problem with agriculture business is people have to eat. Therefore the
political regimes have tremendous pressure and incentives to keep the prices
down, well, as long as they can. On the top of that agriculture products
are hard to store and preserve, so you can't really hoard them. Producers
have to sell the agriculture products before it perishes and worth nothing.
It's a very interesting business as both demand and supply curves are very
inelastic.
Not the case with gold/silver. Average ... 阅读全帖 |
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s********i
发帖数: 17328 | 21 econ 101... Gasoline is a relatively inelastic product, meaning changes in
prices have little influence on demand. |
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b********d
发帖数: 7 | 22 Netflix 的产品已经是inelastic 价格上涨 盈利一定会上涨 所以股价上升 |
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w*******s
发帖数: 91 | 23 【 以下文字转载自 Chemistry 讨论区 】
发信人: wqzmitbbs (wqzmitbbs), 信区: Chemistry
标 题: 求推荐为RSC杂志审稿
发信站: BBS 未名空间站 (Thu May 30 12:14:38 2013, 美东)
本人已有rsc审稿人帐号, 可是一直没有收到过审稿邀请.
恳请版上前辈推荐审稿机会.
手头有CV, 随时发给您参考.
叩谢!感激不尽!
电邮: wqzmitbbs_AT_gmail.com
合适方向:
生物物理(biophysics),
物理化学(physical chemistry),
蛋白质动力学(protein dynamics, enzyme kinetics),
血红素蛋白/卟吩的结构功能 (heme protein structure and function, porphyrins)
光化学/物理(photochemistry, photophysics)
激光光谱学, 拉曼/红外光谱(laser spectroscopy, Raman / FTIR)
非弹性x-射线散射(inelastic x-ray scat... 阅读全帖 |
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k***g
发帖数: 4904 | 24 关键词
resonant tunneling diode (RTD);phonon-assisted inelastic electron tunneling
spectroscopy (IETS)
知名全学科综合性杂志，If 5.x。请注意题目与关键词，确定您有足够背景审稿，如果
方向不match我不能邀请，感谢理解。
如果接受审稿邀请在按时完成的基础上保证审稿质量，请至少对以下--所有--方面有评
价：文章讨论的核心问题是什么，introduction是否让读者很快可以明白文章要讨论的
主题以及其来由，实验设计与结果讨论是否合理，以及是否遗漏重要文献。请注意审稿
时候不要太过苛刻，很多新审稿人常常很认真，但是提出问题的延伸性超出业内一般共
识，简单来说就是即使CNS的文章一样可以进一步提出尚未解释清楚的地方，继续做进
一步研究对吧，所以这个度请掌握好，尽量着眼在大处、全局，讨论核心问题是否严密
、自洽，当然细节的问题也请知无不言。报告以500-800字左右为宜。注意该杂志不让
审稿人基于文章讨论的主题是否具有影响力来判断是否被接收，而把这个留给读者判断
，请注意这个特点，谢谢。
... 阅读全帖 |
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a***a
发帖数: 40617 | 25 70年代opec搞那次是政治，海湾战争是战争，其他还真跟政治没啥关系
你感兴趣不妨研究一下peak oil是什么
说白了是科技（勘探，采集，运输）
石油是很典型的demand和supply都是inelastic的东西
不仅不违背经济规律，而是完美验证经济规律（demand 和supply curve相交点
决定价格）
要不是现在中东国家不sb，限制石油开采和出口，价格跌得更厉害 |
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w*******r
发帖数: 7276 | 26 Almost 12 hours on CC/etc today and still going strong!!
A few of you, in different threads, have asked for some statistics about
this year's admissions process. I don't have many of the specifics y'all
want (i.e. what percentage of USAMO varsity athlete valedictorians with
Intel awards from Iberia), but here are some general numbers so you can get
an idea of how selective this year's process was.
Applications:
- Total applications were up 6.2%, from 15,633 to 16,632. In a historical
context, th... 阅读全帖 |
|
m******3
发帖数: 983 | 27 看着有多少人可以告MIT
Applications:
- Total applications were up 6.2%, from 15,633 to 16,632. In a historical
context, the increase is incredible: in 2006, we had a mere 11,374
applicants.
- Our admit rate was 9.7%. That's down from 10.7% percent last year due to
increased applications with an inelastic class size, and predictions of
increased yield (more people who get in coming to MIT). In 2006, our admit
rate was 13.3%.
Demographics:
- Our incoming class is 53% male and 47% female. The male/female app... 阅读全帖 |
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p**********1
发帖数: 1458 | 28 here is what I think about this hand. I am a cash game fish though, mostly
playing SNG type preflop game. so any critics welcome.
preflop, AK did not say what position villain is at, let's assume two ep
limper, villain call from hj. hero open 6x from btn/co, blinds fold, ep fold
, villain (hj)call. stacks are deep, so villain's range could have small/mid
pair or decent SCs.
flop Q87r goes check-check. villain's check means nothing, hero's check
however often means he has a good hand with showdow... 阅读全帖 |
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P******d
发帖数: 4272 | 29 .....
I literally reading your Chinese writing and have to translate the economic
terms to English in my brain in order to understand what you are saying....
but i agree with you, if the demand doesn't change, then the price won't
change. and I think the demand for xbox games are pretty inelastic hence
there are not many competitors out there for people to switch to if they are
looking for substitutions. |
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n******h
发帖数: 2482 | 30 Use relatively-inelastic commodity, such as oil, as benchmark. Government-
published inflation index does not reflect real purchasing power change,
nor does it account for the productivity gain brought by technology
advancement.
You shouldn't lose your purchasing power from your prior hard work just
because we have better technology now.
One last note, inflation != price increase. |
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p*******y
发帖数: 18288 | 31 明白了，传说中的elasticity，哦，inelasticity
拼对了么 |
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w*******s
发帖数: 91 | 35 本人已有rsc审稿人帐号, 可是一直没有收到过审稿邀请.
恳请版上前辈推荐审稿机会.
手头有CV, 随时发给您参考.
叩谢!感激不尽!
电邮: wqzmitbbs_AT_gmail.com
合适方向:
生物物理(biophysics),
物理化学(physical chemistry),
蛋白质动力学(protein dynamics, enzyme kinetics),
血红素蛋白/卟吩的结构功能 (heme protein structure and function, porphyrins)
光化学/物理(photochemistry, photophysics)
激光光谱学, 拉曼/红外光谱(laser spectroscopy, Raman / FTIR)
非弹性x-射线散射(inelastic x-ray scattering)
低温光谱学(cryogenic spectroscopy) |
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d********y
发帖数: 176 | 36 多谢！
http://iopscience.iop.org/article/10.1088/0022-3719/18/6/008/pdf
Journal of Physics C: Solid State Physics
Low- and very-low-frequency dynamics in ZnCl2 aqueous solutions: a
comparative investigation by Raman, Rayleigh wing and inelastic neutron
scattering
G Maisano, P Migliardo, M P Fontana, M -C Bellissent-Funel and A J Dianoux
Journal of Physics C: Solid State Physics, Volume 18, Number 6 |
|
d********y
发帖数: 176 | 37 多谢！
http://iopscience.iop.org/article/10.1088/0022-3719/18/6/008/pdf
Journal of Physics C: Solid State Physics
Low- and very-low-frequency dynamics in ZnCl2 aqueous solutions: a
comparative investigation by Raman, Rayleigh wing and inelastic neutron
scattering
G Maisano, P Migliardo, M P Fontana, M -C Bellissent-Funel and A J Dianoux
Journal of Physics C: Solid State Physics, Volume 18, Number 6 |
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l********g
发帖数: 59 | 38
系，
~~~~~~~~~~~~~~
so you can define nonlinear material
properties
是已
GUI method: material prop->structural->nonlinear->inelastic->rate dependent
good luck |
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w******u
发帖数: 156 | 39 I only heard of classical, 凯恩思(not sure about the
spelling) ,
and modern. One differece between classical and Kenian is:
classical believes in a downward economy(demand
is weak), price of resources and labor will drop and the
whole
economy will achieve
a new equilibrium rather fast. 凯恩思 says in a downward
economy
price of labor is rather inelastic and fails to drop
quickly, which
cause the price level of product won't drop to the level to
achieve
naturl production rate. He used this idea to expl |
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p**e
发帖数: 676 | 40 1. Signaling of high quality (firm's perspective)
2. Chinese consumers' mentality that foreign moon is rounder and thus high
willingness to pay (consumer characteristics)
3. Inelastic demand - yeah, everyone wants to live (product category
characteristics)
为什么国内的进口药超贵？
最近一个朋友要我打听一种抗癌新药，其国内价格折换成美元是美国这边的5倍。 |
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o********e
发帖数: 34 | 41 【 以下文字转载自 Physics 讨论区 】
发信人: olivertree (Life is good), 信区: Physics
标 题: research scientist position at NIST (open for all nationalities)
发信站: BBS 未名空间站 (Mon Mar 17 16:54:23 2014, 美东)
The Macromolecular and Microstructure Sciences (MMS) team at the NIST Center
for Neutron Research (NCNR) is seeking a research scientist with a strong
record of creativity and achievement in any area of nano and microscale
science or instrumentation science. The candidate should complement and
expand current scien... 阅读全帖 |
|
s***h
发帖数: 592 | 42 跟simo合写computational inelasticity那位？
ft没注意 |
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c******x
发帖数: 21 | 43 take a look at this book
Introduction to Computational Plasticity (Hardcover)
by Fionn Dunne (Author), Nik Petrinic (Author)
This book is decent...the saving grace for the text is that it comes with
working ABAQUS UMAT's (available for free on the book website). The authors'
explanation of the theory of plasticity leaves a bit to be desired. It's
all there, but the explanations get muddy sometimes. I would suggest the
computational inelasticity text by Simo and Hughes as an alternative to this
b |
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c****n
发帖数: 215 | 44 30万太多了，10几万不知道有没有人回去?
发信人: TiAl (一把鞋刷两块布，擦亮人生路), 信区: NumComp
标 题: 【招聘醒目】招fortran码农，做FEA开发的
发信站: 水木社区 (Wed Dec 22 10:27:57 2010), 站内
技术背景要求：
1.精通Fortran编程，F77即可
2.固体力学背景，熟悉材料非线性，state variable建模，
3.熟悉计算弹塑性力学，能独立对给定材料本构进行隐式应力更新算法设计
4.最好是能有个Ph.D的头衔
5.深入钻研过Simo的Computational Inelasticity的有100分的加分
薪资待遇
美国公司，一年15天带薪年假，起薪 1*W/年，工作地点在上海
*的大小根据上面的技术背景而定，如果满足条件5，*应该会很好 |
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x*******n
发帖数: 185 | 45 不是。如果你想看非常high resolution的话，charging会严重影响。宜选用5kev(大概
），low current。你去看看inelastic mean free path的那条universal curve.选用
最低点的电压。原因是，这样electron不会deposit太深，这样就可以通过表面的
contamination layer进行decharging.
最简单的解决方法就是carbon coat your sample.
用gold,或者glod/platinum coat也可以，但因为gold不wet很多东西的表面，容易让你
对表面的情况产生不正确的判断。当然还是取决于你的feature size的大小。 |
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l**n
发帖数: 908 | 47 对于你说的情况，即可以包括单晶的X-ray diffraction，也可以包括相应的Raman
scattering。
个人理解，diffration更强波的概念，scattering则更多强调个体（比如单个电子或光
子）的behavior，尤其是inelastic effect存在的时候。比如说，XRD关心的是反射光
形成的pattern所反映的点阵结构，而Raman谱则反映能量由于非弹性效应引起的变化。
当然，wave和个体之间是有联系的。 |
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p***e
发帖数: 402 | 48 Find the differential cross-section for inelastic scattering of a fast
electron by a hydrogen atom in its ground
state,which as a result of the collision is excited to the 2s state.(
Exchange effects between the colliding and
bound electrons are neglected in this simple model.)
两个粒子相互作业的势能该怎么求呢...想不通... |
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C**R
发帖数: 1047 | 49 read this paper
Inelastic Collisions of Fast Charged Particles with Atoms:
Ionization of the Aluminum L Shell
Manson, PRA, 6,1013, 1972
use equation 1 and 2
I also attached a very naive derivation without the angular momentum part.
You can the accurate equations in
Practical aspects of running the WIEN2k code for electron spectroscopy
Micron 38,12 (2007)
or the other paper I attached |
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E*******1
发帖数: 3464 | 50 你说你怎么学的，这个出来的当然不是声子的wave number，是前后inelastic light
scattering的能量差，说白了是光子的wave number， 你把能量守恒和动量守恒混成一
个方程了
Raman里面声子的q理论上只能是0啊，因为声子的波数和光子的波数差了好几个量级，
否则为什么1st order raman只能记录gamma点上的信息
不能用光的速度吧？只知道波长，不知道频率，不是还是算不出来能量么
知道有效质量。这个phonon的质量一般怎么取呢？ |
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