l*****l
发帖数: 222 | 1 各位大侠，请问有什么方式可以identify一个amorphous的composition？就是在
precusor
decomposition之后，crystallization之前，如何判断一个没有中间过渡的
composition。
BTW, DTA 除了反应peak之外没有别的峰是否就可以说这个反应的产物就是还没有
crystallization的最终产物呢？
自己想了一下，既然XRD无法identify，那么XPS也不可以了。IR或者Ramam有办法把
amorphous的
compound的鉴别出来吗？
多谢了。 |
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m***c
发帖数: 1403 | 2 TEM的diffraction什么样？ 这决定你的是真正amorphous还是只是晶粒小。 |
|
l*****l
发帖数: 222 | 3 因为假设这个amorphous是nano crystal，XRD的beam size和XRD是一样的。两个
diffration都会detect不到。 |
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w*****1
发帖数: 220 | 4 Dear Readers,
We are happy to present the first five papers that are published in our
new, open access journal, Physical Review X. These papers, together with
others that are to be published in the coming weeks into September, will
constitute the first issue of the journal. Under PRX's open access
publishing model, they are free for you to read and use.
We are very encouraged by the breadth of their topical spread. It ranges
from the well-established field of atomic, molecular and optica... 阅读全帖 |
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m**d
发帖数: 21441 | 5 碘化铯(CsI）是目前探测器的主要的闪烁材料。闪烁体或荧光体层经X射线曝光后，将X
射线光子转换为可见光，而后由具有光电二极管作用的非晶硅层变为图像电信号，最后
获得数字图像。除了碘化铯外，还有数十种荧光闪烁材料可以用于线阵列X射线探测器
的开发。其中，常用的有碘化铯、钨酸镉、硫氧化轧等。
从1995年推出第一台平板探测器（Flat Panel Detector）设备以来，随着近年平板探
测技术取得飞跃性的发展，在平板探测器的研发和生产过程中，平板探测技术可分为直
接和间接两类。
（一）间接能量转换
间接平板探测器（FPD）的结构主要是由闪烁体或荧光体层加具有光电二极管作用的非
晶硅层(amorphous Silicon，a-Si)再加TFT阵列构成。其原理为闪烁体或荧光体层经X
射线曝光后，将X射线光子转换为可见光，而后由具有光电二极管作用的非晶硅层变为
图像电信号，最后获得数字图像。在间接FPD的图像采集中，由于有转换为可见光的过
程，因此会有光的散射问题，从而导致图像的空间分辨率及对比度解析能力的降低。闪
烁体目前主要有碘化铯(CsI，也用于影像增强器)，荧光体则有硫氧化钆(Gd... 阅读全帖 |
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c***z
发帖数: 6348 | 6 【 以下文字转载自 DataSciences 讨论区 】
发信人: chaoz (面朝大海，吃碗凉皮), 信区: DataSciences
标 题: OCR job from recruiter - it is interesting but I can't do it, yet
发信站: BBS 未名空间站 (Fri Jun 20 12:25:07 2014, 美东)
If you would be interested please let me know at h******[email protected] as
early as possible.
Job Title: position for Data Scientist for Machine Learning and Natural
Language Processing Experience
Company: BITS
Task 1: Extend NIST Scientific Text Extraction System
Description of Tasks
I. Implement distributed... 阅读全帖 |
|
c***z
发帖数: 6348 | 7 【 以下文字转载自 DataSciences 讨论区 】
发信人: chaoz (面朝大海，吃碗凉皮), 信区: DataSciences
标 题: OCR job from recruiter - it is interesting but I can't do it, yet
发信站: BBS 未名空间站 (Fri Jun 20 12:25:07 2014, 美东)
If you would be interested please let me know at h******[email protected] as
early as possible.
Job Title: position for Data Scientist for Machine Learning and Natural
Language Processing Experience
Company: BITS
Task 1: Extend NIST Scientific Text Extraction System
Description of Tasks
I. Implement distributed... 阅读全帖 |
|
c***z
发帖数: 6348 | 8 If you would be interested please let me know at h******[email protected] as
early as possible.
Job Title: position for Data Scientist for Machine Learning and Natural
Language Processing Experience
Company: BITS
Task 1: Extend NIST Scientific Text Extraction System
Description of Tasks
I. Implement distributed PDF to image conversion subsystem that converts
pages of scientific articles to individual images.
II. Implement distributed optical character recognition-based text
extraction system ... 阅读全帖 |
|
i*******r
发帖数: 3 | 9 劝大家还是别海归了。你们是斗不过中国的土博的。
说说长江学者吧。该奖项是中国特聘教授的最高级别，要求“学术造诣高深，在科学研
究方面取得国内外同行公认的重要成就；具有创新性、战略性思维，具有带领本学科赶
超或保持国际先进水平的能力”。然而看了中南大学2011长江学者刘文胜的个人简历后
，本人寒心了：
刘文胜,中国籍,男,1967年生,博士,教授,博士生导师,中共党员。刘文胜先生长期从事
航空制动系统、钛铝合金、无铅焊料和难熔合金材料的研究工作。作为项目执行负责人
之一,承担了国防科工委国债技改项目“军用钨基高比重合金生产线”、“轻质高强结
构材料国防科技重点实验室”的立项和建设工作;作为项目负责人承担了国家“863”高
技术研究计划重点项目,国家自然科学基金项目,国防军工配套项目,国防基础科研项目,
国际合作项目及省部级项目等近10项,并取得了较好的研究成果,得到了同行专家的一致
好评。在国内外知名刊物上公开发表学术论文30余篇,其中被EI收录18篇,被SCI收录11
篇,申请国家发明专利5项,出版专著1部,获省部级科技进步一等奖2项。现任中南大学粉
末冶金研究院党委书记兼副院长,粉末... 阅读全帖 |
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a***e
发帖数: 27968 | 10 you totally get it wrong about the LCD power.
switching is a small part of it. the back light is what matters.
if you want same brightness, power scales almost linear with area.
this is true until you push the amorphous silicon limit.
ipad3 is a totally different story. the use amorphous silicon brute-forcely
to drive retina. the direct result is the pixel filling ratio drop to half
in ipad 2, dark area (where the TFT is) is about 20% of area. this means at
full brightness, near 80% back light g... 阅读全帖 |
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S*******r
发帖数: 275 | 11 【 以下文字转载自 NanoST 讨论区 】
发信人: Sunbuster (紫外线), 信区: NanoST
标 题: 玻璃上的半透明金属薄膜厚度如何测量？？
发信站: BBS 未名空间站 (Tue Feb 5 15:59:50 2013, 美东)
transparent thin film (maybe amorphous / crystalline) grown on amorphous
glass substrate, how do I get the thickness besides TEM, SEM? |
|
S*******r
发帖数: 275 | 12 【 以下文字转载自 NanoST 讨论区 】
发信人: Sunbuster (紫外线), 信区: NanoST
标 题: 玻璃上的半透明金属薄膜厚度如何测量？？
发信站: BBS 未名空间站 (Tue Feb 5 15:59:50 2013, 美东)
transparent thin film (maybe amorphous / crystalline) grown on amorphous
glass substrate, how do I get the thickness besides TEM, SEM? |
|
b****n
发帖数: 379 | 13 为什么amorphous就没有melting point? 样品本来就是powder ("amorphous"?), 不是
晶体的。 |
|
|
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b***e
发帖数: 115 | 16 第二个说法不是很正确,我觉得
amorphous phase are easier to be degraded, but
pure amorphous phase can not be degraded
i-PHB and a-PHB is a example of this.
so , many factor must be considered. |
|
o********e
发帖数: 34 | 17 If it is amorphous polymer matrix, things will be very difficult.
Typically, unless you have a nice model, it is very difficult to obtain
a quantitative result.
I am not sure why you want to use SAXS to characterize your system.
I hope you still have some characteristic feature in your results which can be
linked
to the problem you want solve.
As far as I konw, unless you have already known the detail structure of
an amorphous system, it is almost impossible to quatitatively calculate
the scatte |
|
w******t
发帖数: 107 | 18 请教版上搞电化学的兄弟：
在cycle多孔碳材料（amorphous）的时候，用什么样的电解液合适呢？
用1M LiClO4/EC/DMC(1:1 v/v)与用LiPF6/EC/DMC(1:1 v/v)有显著性区别吗？看书上说
LiPF6形成的SEI layer更致密。我曾经用过1M LiClO4/PC，但是发现cycleability不太
理想，而且Coulombic efficiency也没有在最初几个循环中超过90%。在第一个charge
过程中，在0.9V (vs. Li+/Li)处有一个很大的平台，我想是PC（和LiClO4）分解导致
的吧？可是看书上和文献中都说，PC可以用作amorphous carbon anode的电解液。咋回
事呢？谢谢了先！ |
|
S*******r
发帖数: 275 | 19 transparent thin film (maybe amorphous / crystalline) grown on amorphous
glass substrate, how do I get the thickness besides TEM, SEM? |
|
S*******r
发帖数: 275 | 20 transparent thin film (maybe amorphous / crystalline) grown on amorphous
glass substrate, how do I get the thickness besides TEM, SEM? |
|
C*********r
发帖数: 2671 | 21 Mask the surface, or scratch the surface to unveil the substrate. AFM, in
most case can only detect film thickness below 6um(bruker dimesion series
for example, not sure about icon and fastscan) and a high risk of bump the
tip, but interferometer works fine most time. AFM is limited by the big
features existing on the surface, you might have to deal with artifacts &
drastic force interaction change.
transparent thin film (maybe amorphous / crystalline) grown on amorphous
glass substrate........ |
|
e*******n
发帖数: 174 | 22 俺们图书馆比较土，很多期刊都没有。请大家帮忙。谢谢！
1)作者：O. L. Krivanek, P. H. Gaskell* & A. Howie
文题：Seeing order in 'amorphous' materials
杂志缩写或全名：Nature
年份，卷（期），起止页码：262, 454 - 457 (05 August 1976); doi:10.1038/
262454a0
Hyperlink：
http://www.nature.com/nature/journal/v262/n5568/abs/262454a0.html
2)作者：J. Murray Gibson
文题：Breakdown of the weak-phase object approximation in amorphous objects
and measurement of high-resolution electron optical parameters
杂志缩写或全名：Ultramicroscopy
年份，卷（期），起止页码：Volume 56, Issues 1-3, Novembe |
|
o***s
发帖数: 42149 | 23 斯坦福大学研究人员成功制造出一种非结晶的钻石。图为带领研究小组的毛立文教授（左）和小组主要研究员研究生林昱（右）。（美国《世界日报》 取材自斯坦福大学网站）
据美国《世界日报》综合报道，斯坦福大学一个研究小组制造出一种另类钻石，一种可称为“非结晶的钻石”(an amorphous diamond)；钻石是结晶的碳物质，而小组制造出来的新的碳物质，硬度与钻石相同，只是不结晶。
那么，非结晶的钻石有什么好处？小组成员、史大研究生林昱(Yu Lin)解释说：“有时不结晶的物质会比结晶的物质优胜。”
钻石因为受过切割，切割破坏了碳物质的硬度，因此除了用来作珠宝，当钻石用来作其它用途时，作用会减少。
带领研究小组的斯坦福大学地质及环境科学助理教授毛立文(Wendy Mao)说，从物质本身的质地来说，钻石是有限制和有破损的，如果钻石也变为非结晶物质，同样可以保持没有破损的“面面俱硬”状况。
在保持全面硬度的情况下，本身重量又很轻的“非结晶钻石”可以有不少用途，例如作为其它物质的切割物，以及作为其它物体的保护物等。
至今为止，其它研究人员也尝试制造出像钻石那样的非结晶碳物质，但没有成功，身为华裔的毛... 阅读全帖 |
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R*I
发帖数: 1840 | 24 作者是Edward Goldberg，听起来名字是犹太人，奥巴马外交精选团队外交政策的主将
之一，Thomas Friedman经常引用他的文章，
这篇是佛里德曼最近提到的一篇，认为美国失去了埃及，而中国（准确的讲，中国的理
念）得到的埃及。看来共和党批判奥巴马团队充满了赤化分子真的不是没道理（不是还
有一个幕僚的说她最推崇的两个人之一是老毛么？）。这哥们放的炮连真五毛都不敢这么讲
http://www.theglobalist.com/storyid.aspx?StoryId=8989
Who Lost Egypt?
By Edward Goldberg | Friday, February 11, 2011
However the impending power shift in Egypt plays out, one can already hear
the simplistic charges that Obama lost Egypt — as if it were America’s to
lose. Eddie Goldberg argues the... 阅读全帖 |
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f****l
发帖数: 8042 | 25 Mr. Fu 1919-2011.
In 1997, the Columbia School of Engineering and Applied Science received a
gift of $26 million from a Chinese businessman known only as Z.Y. Fu. The
School was allowed to use the money in any way it saw fit; Fu’s only
stipulation was that the 133 year-old institution had to rename itself “The
Fu Foundation School of Engineering and Applied Science,”
Fu said he made the gift because: “I am a regular visitor to New York,
where Columbia is the most prestigious institution of highe... 阅读全帖 |
|
s*****r
发帖数: 43070 | 26 英文水平不太出彩啊，读博士害死美女
I'm an overseas student from China and I've been in England for 4 years.
This is the third year of my PhD under the supervision of Fiona Meldrum. My
project is about carrying out crystallisation in small volumes, using a
Crossed-Cylinder apparatus and with addition of various additives. I have
begun to explore the use of this system to study CaSO4 precipitation in bulk
solution and confinement. And it appears that amorphous calcium sulfate (
ACS) and metastable phase, hemihydra... 阅读全帖 |
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Q********a
发帖数: 851 | 27 What do you mean by that amorphous "such a thing"? If you mean that "thing"
is Boeing 777, then you are probably right but that is meaningless. What's
the chance of you robbing the same house twice?
can |
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w*******e
发帖数: 15912 | 28 【 以下文字转载自 Physics 讨论区 】
发信人: wsnonline (卫所南次郎-镇王府井镇动物园镇地安门), 信区: Physics
标 题: [转载] 看看中国的落后的物理科研现状，多么可怕！
发信站: BBS 未名空间站 (Wed Sep 24 01:25:05 2014, 美东)
印度比天朝物理强不少啊。
[转载] 看看中国的落后的物理科研现状，多么可怕！
作者: xylang (站内联系TA) 发布: 2005-12-06
review of modern physics 可谓是物理学界之至高无上无克配敌的刊物，从１９２９
年到现在共只有２７５３篇次的文章被发表，可见其分量多重啊，比起physical
review seriers 和 PRL 都高级很多啊，我一个南京大学的同学说就他们学校的一个
做群论的叫做陈金全的教授发过一次，并且他后来有可能再被邀请发一次，不幸他过早
的去世了，然后中国（至少内地）就没有一个发过这个东西。陈金全的那本名作我是有
的，是在北京遇到南京大学的一个博士，很好的一个人——一个很帅的大哥送给我的，
可惜我没有看，他从南京寄给我，当... 阅读全帖 |
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x******g
发帖数: 33885 | 29 将军们来看看这篇分析：
Trump and ‘Revolt on the Right’
The Trump electoral campaign has many of the features of a Latin American
nationalist-populist movement. Like the Argentine Peronist movement, it
combines protectionist, nationalist economic measures that appeal to small
and medium size manufacturers and displaced industrial workers with populist
right-wing ‘great nation chauvinism’.
This is reflected in Trumps’ attacks on ‘globalization’ - a proxy for
Peronist ‘anti-imperialism’.
Trump’s attack on the... 阅读全帖 |
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b********n
发帖数: 38600 | 30 Accuses Washington of causing refugee crisis...not Obama's or former
Secretary of State Clinton's foreign policy. No, some amorphous thing called
...Washington.
Very clever Frau Merkel ;-) |
|
r*s
发帖数: 2555 | 31 【 以下文字转载自 Joke 讨论区 】
发信人: rbs (jay), 信区: Joke
标 题: 诺委会太不像话了
发信站: BBS 未名空间站 (Wed Oct 4 10:23:52 2017, 美东)
尼玛87篇参考文献就不能加一篇施教授或能教授的CNS？
References
1. Ruska, E., Nobel Lectures, Physics 1981-1990, Tore Frängsmyr and
Gösta Ekspong, Eds. (1993) World Scientific Publishing, Singapore
2. Marton, L. (1934) Electron microscopy of biological objects. Nature
133, 911-911
3. Althoff, T., Mills, D. J., Popot, J. L., and Kühlbrandt, W. (2011)
Arrangement of electron transport chain compone... 阅读全帖 |
|
发帖数: 1 | 32 我可以看得到，copy paste将就看下吧
Image
CreditCreditPhoto illustration by Joan Wong. Photographs by Ronghui Chen for
The New York Times.
Skip to content
Skip to site index
Where Does Affirmative Action Leave Asian-Americans?
A high-profile lawsuit against Harvard is forcing students and their
families to choose sides.
CreditCreditPhoto illustration by Joan Wong. Photographs by Ronghui Chen for
The New York Times.
By Jay Caspian Kang
Photographs by Ronghui Chen
Published Aug. 28, 2019
Updated Sept. ... 阅读全帖 |
|
l****z
发帖数: 29846 | 33 September 12, 2011 1:23 A.M.
By Victor Davis Hanson
One unfortunate current in the commemorations of the tenth year after 9/11
has been a widely promoted narrative that we lashed out, overreacted, and —
through Afghanistan, Iraq, and the war on terror — not only lost our post-
9/11 unity and “civility,” but supposedly alienated most of the world
while playing into the hands of al-Qaeda.
In this regard, most unfortunate was the blog posting (replete with all the
tired formulaic slurs about “fake... 阅读全帖 |
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l****z
发帖数: 29846 | 34 I can’t wait to see what those courageous atheists come up with for Ramadan.
Christmas in America is a season of time-honored traditions — the sacred
performance of the annual ACLU lawsuit over the presence of an
insufficiently secular “holiday” tree; the ritual provocations of the
atheist displays licensed by pitifully appeasing municipalities to sit
between the menorah and the giant Frosty the Snowman; the familiar strains
of every hack columnist’s “war on Christmas” column rolling off the
key... 阅读全帖 |
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z****z
发帖数: 2054 | 35 对了解alt-right应该有帮助.
An Establishment Conservative’s Guide To The Alt-Right
by Allum Bokhari & Milo Yiannopoulos29 Mar 20164584
A specter is haunting the dinner parties, fundraisers and think-tanks of the
Establishment: the specter of the “alternative right.” Young, creative
and eager to commit secular heresies, they have become public enemy number
one to beltway conservatives — more hated, even, than Democrats or loopy
progressives.
The alternative right, more commonly known as the alt-right, is ... 阅读全帖 |
|
z****z
发帖数: 2054 | 36 个人认为里面关于移民的说法实际上还是很客观的.
the
amorphous |
|
b********n
发帖数: 38600 | 37 Accuses Washington of causing refugee crisis...not Obama's or former
Secretary of State Clinton's foreign policy. No, some amorphous thing called
...Washington.
Very clever Frau Merkel ;-) |
|
f**********n
发帖数: 29853 | 38 TheWashington PostPublishes the Worst Analysis Yet of Neil Gorsuch’
s Confirmation Fight
byEdward BlumApril 5, 2017 3:30 PM
The prize for the worst analysis to date about the confirmation of Judge
Neil Gorsuch to the U.S. Supreme Court should be awarded to Professor
Richard Hasen of the University of California–Irvine Law School. Professor
Hasen’s evolution from a serious legal scholar to a partisan mudslinger is
now sadly complete.
That is the only conclusion to be drawn from his April 2Washing... 阅读全帖 |
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t**********3
发帖数: 12623 | 39 PCV是啥？你说PVC polyvinyl chloride？
日本车不用沥青阻尼amorphous poly alpha olefin塑料？
我倒是真心喜欢RL/Legend
PCV |
|
g********d
发帖数: 19244 | 40 ☆─────────────────────────────────────☆
felixcat (felixcat) 于 (Wed Mar 20 11:40:45 2013, 美东) 提到:
因为担心法律上的问题，去年8月份我早就很委婉地提过这个问题，看这里34楼：
http://ipv6.weiming.info/zhuti/Automobile/33415715/
----------------------------------------------------------
felixcat 2012-08-20 19:51:10
这是前座的特写。
尤其要说一下那个皮椅。因为300跟E class的关系实在太密切了，所以不得不互相比较
一下。
虽说300上皮椅的用料不能说得上是最好的皮料，但起码摸上去和坐上去感觉跟家具店
里那些高档皮沙发有那么些相似的影子。而MB E class我觉得很奇怪，高一档的S
class皮椅坐上去舒服，但一到了E Class，仿佛MB一下子就因为成本低了这么多不知道
该怎么办了——E class sedan标配竟然用出租车级别的假皮面料... 阅读全帖 |
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m****1
发帖数: 736 | 41 http://www.nae.edu/Projects/MediaRoom/20095/130169/130172.aspx
New Members
Atwater Jr., Harry A., Howard Hughes Professor of Applied Physics and
Materials Science, California Institute of Technology, Pasadena. For
contributions to plasmonics.
Balakrishnan, Hari, professor of computer science, Massachusetts Institute
of Technology, Cambridge. For contributions to wired and wireless networks
and distributed systems.
Bardasz, Ewa A., president, ZUAL Associates Consulting, Mentor, Ohio. For
novel au... 阅读全帖 |
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w******e
发帖数: 1 | 42 Ph.D. Study Opportunities
in
Materials Science at Tennessee Technological University
Several positions for Ph. D. candidates are open immediately at the Department
of Mechanical Engineering, Tennessee Technological University. The research
topics include, but are not limited to, the following areas:
(1) Nanocrystalline magnetostictive materials based on bulk amorphous alloys,
which includes alloy design, processing, transmission electron microscopy of
the nano-scale structures, magnetic and magn |
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b*******k
发帖数: 16989 | 44 【 以下文字转载自 Headline 讨论区 】
发信人: Onews (OverseasNews), 信区: Headline
标 题: 斯坦福大学华裔女研究员制出“另类钻石”(图)
发信站: BBS 未名空间站 (Wed Oct 19 01:33:47 2011, 美东)
斯坦福大学研究人员成功制造出一种非结晶的钻石。图为带领研究小组的毛立文教授（左）和小组主要研究员研究生林昱（右）。（美国《世界日报》 取材自斯坦福大学网站）
据美国《世界日报》综合报道，斯坦福大学一个研究小组制造出一种另类钻石，一种可称为“非结晶的钻石”(an amorphous diamond)；钻石是结晶的碳物质，而小组制造出来的新的碳物质，硬度与钻石相同，只是不结晶。
那么，非结晶的钻石有什么好处？小组成员、史大研究生林昱(Yu Lin)解释说：“有时不结晶的物质会比结晶的物质优胜。”
钻石因为受过切割，切割破坏了碳物质的硬度，因此除了用来作珠宝，当钻石用来作其它用途时，作用会减少。
带领研究小组的斯坦福大学地质及环境科学助理教授毛立文(Wendy Mao)说，从物质本身的质地来说，钻石是有限制和有破损的... 阅读全帖 |
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g********r
发帖数: 4248 | 45 软的也可以硬
（左）和小组主要研究员研究生林昱（右）。（美国《世界日报》 取材自斯坦福大学
网站）
可称为“非结晶的钻石”(an amorphous diamond)；钻石是结晶的碳物质，而小组制造
出来的新的碳物质，硬度与钻石相同，只是不结晶。
时不结晶的物质会比结晶的物质优胜。”
其它用途时，作用会减少。
本身的质地来说，钻石是有限制和有破损的，如果钻石也变为非结晶物质，同样可以保
持没有破损的“面面俱硬”状况。
作为其它物质的切割物，以及作为其它物体的保护物等。 |
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C*G
发帖数: 7495 | 46 磁盘上的amorphous nano carbon 表面技术/研究最好的，就是美帝和日本了。
世界上已知表面最平整的东东，据说平整度能控制在1A内。
hiahia |
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u*l
发帖数: 523 | 47 for thin solid films
器件物理 方向
Keywords: thin film detector; amorphous silicon; photonic device;
hyperspectral imaging; reflectance measurement
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