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全部话题 - 话题: crystalline
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s****e
发帖数: 2934
1
来自主题: Macromolecules版 - 多谢大家了,继续讨论吧!
By colloidal crystal, I meant indeed crystalline structure formed by colloid
particles. A lot of people are studying so-called colloidal gel when the
colloidal particles are introduced attractive interactions, they can form a
network just like a polymer gel. I am not sure whether these colloidal
particles can form an ordered structure under some special technique.
I knew of some work by David Weitz and probably Whitesides who tried to attain
crystalline order in the micellar solution, but can no
s*****g
发帖数: 221
2
来自主题: Macromolecules版 - 高分子的结晶尺寸大概多少啊
这个公式不可以乱用。现在被许多人借用来计算高分子结晶的尺寸,科学性值得怀疑,
只能做一个辅助的数值或者估算结果。
好了,知道了这个问题出在哪里啦。
还剩那个crystalline size是怎么算的问题。
我不是大师,不知道结论的错与对,但是喜欢分析具体是怎么出错的。
我现在只剩一个怀疑你是怎么算的crystalline size的过程。
w*****1
发帖数: 220
3
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
f**********g
发帖数: 2252
4
来自主题: _pennystock版 - 5 Stocks Under $10:TIVO JASO EXEL LYV AONE
5 Stocks Under $10 for Sept.
By Rick Aristotle Munarriz | More Articles
September 20, 2010 | Comments (0)
Netflix Hits $100!David Gardner called Netflix in 2004 at $15.42. He’s up
684% as of July 13th. See what David’s recommending that you buy NEXT.
If you've got 10 bucks, I have some stock ideas for you.
Sure, you will technically need more than a Hamilton. You have stock
commissions to deal with. Investors will also want to buy in bigger lots.
However, there is certainly plenty of volatility ... 阅读全帖
l****u
发帖数: 3130
5
来自主题: Military版 - 武汉大学80后美女袁荃教授走红
姓 名: 袁 荃 Yuan _ Quan
出生年月:1982年2月
学历: 博士, 教授
专业方向:分析化学
电 话:
Email:y*********[email protected]
教育与研究经历
2000年9月– 2004年7月:武汉大学化学学士学位
2004年9月– 2009年7月:北京大学无机化学博士学位导师:严纯华院士
2009年9月-2011年12月:佛罗里达大学化学系博士后谭蔚泓教授课题组
2011年12月-现在:武汉大学化学学院教授
代表性成果
1.Quan Yuan, Yun-Fei Zhang, Ruo-Wen Wang, Chao-Lin Du, Emir Yasun, Yan Chen,
and Wei-Hong Tan* “Using Silver Nanowire Antennas to Enhance the
Conversion Efficiency of Photoresponsive DNA Nanomotors” Proc. Natl. Acad.
Sci. U. S. A. 2011, 108, 9331.
2.Quan Yuan, Hao-Hong ... 阅读全帖
x****u
发帖数: 12955
6

Each layer of deposit is very thin, so there's no problem for laser to melt
it through.
Density isn't a problem if you can control the speed of deposition and
temperature so that the metal naturally forms crystalline structure. By
controlling the crystal growth, you get exactly the density you want, even
better than forging.
c****e
发帖数: 1628
7
注意这段话"Current evidence from archaeology indicates that cast iron was
first produced in Europe at two sites in Sweden, Lapphyttan and Vinarhyttan,
sometime between 1150 and 1350"并且有可能是蒙古人从中国带过去的。
中国汉代就知道把生铁和“熟铁”合炼,调节铁碳含量而成钢。也就是所谓的“灌钢
”。
在欧洲,直到17世纪才认识到这一点。
Medieval Iron and Steel -- Simplified
Bert Hall
Institute for the History and Philosophy of Science and Technology
University of Toronto
----------------------------------------------------------------------------
----
Iron is one of the most us... 阅读全帖
c****e
发帖数: 1628
8
注意这段话"Current evidence from archaeology indicates that cast iron was
first produced in Europe at two sites in Sweden, Lapphyttan and Vinarhyttan,
sometime between 1150 and 1350"并且有可能是蒙古人从中国带过去的。
中国汉代就知道把生铁和“熟铁”合炼,调节铁碳含量而成钢。也就是所谓的“灌钢”。
在欧洲,直到17世纪才认识到这一点。
Medieval Iron and Steel -- Simplified
Bert Hall
Institute for the History and Philosophy of Science and Technology
University of Toronto
----------------------------------------------------------------------------
----
Iron is one of the most use... 阅读全帖
b******2
发帖数: 8
9
found this in reddit
Gallium nitride (GaN), which is the material used to create blue LEDs, is
hard to grow. In order to make an LED you need to make a P-N junction,
meaning a layer of p-type material (positively doped) on top of n-type
material (negatively-doped). "Doping" a material is the process of changing
the carrier concentration (number of electrons or holes) and this can be
done by adding other elements with a different charge state, such as silicon
(adds an electron) or magnesium (take... 阅读全帖
b******3
发帖数: 4385
10
来自主题: Military版 - 来一段总书记的英语
Research on science and technology has a long record in human history. New
breakthroughs have been made continuously, with the development and progress
of society, on the way toward the heights of science. Over the past 100
years from thelate 19th century to the present, science and technology have
successively
evolvedthrough the ages of electrification, atomic energy, aviation, and
space, and now enter the information age. They are the most important
impetus to the
development of human civiliza... 阅读全帖
D*******r
发帖数: 281
11
Silevo was founded the summer of 2007 in the heart of Silicon Valley by a
pair of executive innovators from Applied Materials, Inc. With more than 35
years of experience in semiconductor innovations and more than 130 patents
between them, Dr. Zheng Xu and Dr. Jianming Fu envisioned a new hybrid solar
cell technology that would combine the best attributes of crystalline
silicon, thin film and semiconductor CMOS device architectures and materials
to achieve the highest performance efficiencies and... 阅读全帖
W*****B
发帖数: 4796
12
来自主题: Military版 - 精液可以用来做护肤品吗?
看到有人说精液可能有治疗痘痘的功效。有人试过吗?是不是经常被颜射皮肤就会很好
?黄片里头演员皮肤都还不错,是不是经常被颜射的原因?
In sperm, a crystalline polyamine compound called Spermine can be found.
This particular compound is also known as an antioxidant. It is believed to
diminish wrinkles, smooth skin and help with taming or preventing acne.
Bioforskning, a Norwegian company, has synthesized the compounds into a
facial cream.
r*s
发帖数: 2555
13
来自主题: Military版 - 诺委会太不像话了 (转载)
【 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
14
名字叫舍恩。
德国科学家。不少Nature,Science。后来均被撤稿。
以下摘自维基百科。将军们怎么看这位白人科学家?据一位王姓的华人知名professor
透露,他去演讲,有个欧洲白人老头老是说华人professor的文章是造假造出来的数据
,华人教授气都气死了。
【舍恩事件】
舍恩事件是一起于2002年揭发的大规模学术论文造假丑闻。事件主角扬·舍恩 (Jan
Hendrik Schön) 1970年生于德国费尔登,1997年获康斯坦茨大学物理学博士学位
并留校任教,1998年加入贝尔实验室,于贝尔特拉姆·巴特洛格教授指导下做材料学研
究,2001年成为正式员工。之后的4年里,他与20多人合作在许多大型国际期刊上发表
了超过80篇论文,在《自然》和《科学》上发表的第一作者署名的论文就有17篇。这些
论文在当时被认为于分子电路、分子半导体、有机激光、高温超导和纳米科技领域取得
突破进展,震动了整个科学界。2001年,他获得了德国最重要的科学奖项之一——奥托
·克隆-韦伯银行奖。
舍恩最出名的“成就”是于2001年11月发表的单分子场效应管。他称在两层金电极之间
用含硫的有... 阅读全帖

发帖数: 1
15
来自主题: Military版 - Lieber 60万/年,性价比很高
Lieber's contributions to the rational growth, characterization, and
applications of a range of functional nanoscale materials and
heterostructures have provided concepts central to the bottom-up paradigm of
nanoscience. These include rational synthesis of functional nanowire
building blocks, characterization of these materials, and demonstration of
their application in areas ranging from electronics, computing, photonics,
and energy science to biology and medicine.[13]
Nanomaterials synthesis. ... 阅读全帖
l****z
发帖数: 29846
16
Study: Obama's 2013 Regulations Could Cost More Than $130 Billion
July 9, 2013 - 3:43 PM
By Joe Schoffstall
Current and proposed regulations put forward by the Obama Administration in
2013 could cost over $130 billion, according to newly released study.
The study, put together by the American Action Forum, takes a look at the
administration's spring agenda of current and proposed federal regulations-
known as the Unified Agenda. The Unified Agenda is released twice a year and
details the regulat... 阅读全帖
c*****g
发帖数: 21627
17
America the Shrunken
MAY 3, 2014
Frank Bruni
NOT long ago I asked a good friend of mine — one of the smartest men I know
, and one of the most devoted dads — if he thought that his children would
live in a more prosperous America or at least enjoy the same bounty of
opportunities that we had.
His response was instant and unequivocal. No.
“How do you make peace with that?” I said.
He shrugged, laughed bitterly and answered, “I’m hoping to leave them a
lot of money.”
The American dream, 2014 editi... 阅读全帖
x******s
发帖数: 47
18
来自主题: USANews版 - 床铺要救煤炭业

电哥是能源业人士啊?对下面的研究怎么看?coal-fired plants are between 65 USD
and $150 per MWh, Onshore wind turbines are 32-77 USD per MWh
https://en.wikipedia.org/wiki/Cost_of_electricity_by_source#Laz
29
In November 2015, the investment bank Lazard headquartered in New York,
published a study on the current electricity production costs of
photovoltaics in the US compared to conventional power generators. The best
large-scale photovoltaic power plants can produce electricity at 50 USD per
MWh. The upper limit at ... 阅读全帖
g*******1
发帖数: 2799
19
来自主题: Automobile版 - Window Tint 大家有什么推荐的?

Suntek好么?
在别的地方专门贴的朋友
推荐一是3M Crystalline
第二个是llumar CTX 40
k****a
发帖数: 7077
20
来自主题: Automobile版 - Window Tint 大家有什么推荐的?
我用的3M Crystalline,$495。不过是compact car.
Y****a
发帖数: 17170
21
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
我打算visor 4”, front 70% (主要是为了去UV, 和防热(能防一点是一点)
后面有厂家的private glass,不知道是否也要贴一把因为既然要搞防热就搞彻底点。
但是不知道效果如何? 有不有说的那么神奇,是不是会凉爽一些?
不然就不大动干戈了。
另外两个问题,
1)如果厂家本身有private glass (不是tint的,玻璃本身是暗的)是否需要接着
tint,或者就不理了。
2)Visor 一般4“够不够?
或者求其他的推荐。
本州可以上35%的,visor可以到6"
http://tintlaws.com
S****i
发帖数: 1785
22
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
co ask
x*b
发帖数: 5723
23
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
要纠正一个误区,Private Glass只是带色的玻璃而已,不会有任何隔热效果,UV也不
行。也即是说Private Glass不会从本质上带来更好的隔热效果或隔UV效果,只是单纯
颜色深一点比较保护隐私而已。
想要彻底隔热和UV Protection一定要上Tint,首推Ceramic。一般比较保险的贴法是50
% all around,这种绝大多数情况下不会被警察Pull Over。不过这个也是case by
case,我的车40% all around, 30% for back window 2年多了也没被找麻烦过。不过
Ceramic Tint本身会比同级别的普通Tint略微浅一点点,而且看起来的效果会更接近
OEM的感觉。
另外你相信我,如果你贴的膜是好膜的话,你的车会凉爽一大截,完全不可同日而语。
没什么意外的话,长途行驶即使是盛夏你的空调都不用开超过1档(最多一开始开大一些
迅速冷却下来),至少我在湾区最热的那几天也是这样的。
w****2
发帖数: 936
24
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
All bullshit. Where did you get these 'information'? I bet they all come
from saleperson in China.
Regular car glasses block 99% UV. If you wear color changing glasses and
drive, you will know. The glasses do not get dark when you are driving,
because the windshield glass blocks all UV.
i****x
发帖数: 17565
25
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
There are two types of uv. Glass blocks 99% of one but let through the other
.
s********9
发帖数: 82
26
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
Only the windshield blocks most UV. Side windows normally do not unless they
are upgraded to laminated glass (which is always used for windshield). I
have ceramic tint installed on my side and back windows and it does make a
big difference.
x*b
发帖数: 5723
27
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
You seriously should do some research before make any comments, regular side
and rear windows do NOT block UVA, even the private windows. Only the
windshields block both UVA and UVB at the same time because its made of
laminated glass(by law).
Check the below links then you will know, I do not post comments without
check at least 2 resources.
http://www.skincancer.org/prevention/are-you-at-risk/sun-hazard
http://autos.aol.com/article/not-all-car-windows-protect-agains
g***i
发帖数: 4272
28
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
装逼装爆了。。。
玻璃能阻隔的是UVB,而UVA是无法阻隔的。
x*b
发帖数: 5723
29
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
Agree, ceramic is the best, it well worth the extras.

they
B*Z
发帖数: 7062
30
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
mr tint 用什么膜?大概多少钱呢?

50
x*b
发帖数: 5723
31
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
都有,普通膜$300 for most 4-door cars, ceramic $500。coupe车型的话应该各减$
75-100左右,具体要去问。他们家一年会有一次groupon,但是今年的好像已经过了。
他们家不是最便宜的,但是手艺是我见过最好的,边边角角基本都是0 gap,所以我一
直用他们家,凡是朋友我也都推荐去他们家贴tint所以和老板关系很好。记得去找
Terry,你说你是我介绍来的,能不能给discount,通常都会给你10% off if you pay
cash。
湾区还有另一家高大上的店在Fremont,我之前介绍过,叫Premier。他们家用的据说是
最牛的Nano-Technology膜,如果不追求性价比只要最好,那他们家是湾区最牛的,没
有第二。去贴的基本都是High-end exotics.你看下面第二个link里有一个Spectra
PhotoSync vs. Ceramic Tint on Lamborghini Aventador,里面的Ceramic膜颜色还更
深但是完全没法和前者比。我准备买了Macan后就去试试这个膜和他们家的Clear Br... 阅读全帖
B*Z
发帖数: 7062
32
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
不好意思,我不是问更好的,我的意思是ceramic tint也有很多种。yoyoha说的是一种
,是否mr tint也用这种3m的tint薄膜?

pay
x*b
发帖数: 5723
33
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
他们家有3-4种膜,包括ceramic。具体品牌你得去问,我记得有3M的。

★ 发自iPhone App: ChineseWeb 8.6
Y****a
发帖数: 17170
34
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?

50
其实我这个并不是ceramic的好像,但是是high end 级别的。
可以滤掉50%的热量,连红外线都可以几乎全干掉,强的一塌糊涂,就是贵!
http://solutions.3m.com/wps/portal/3M/en_US/ScotchgardAutoProte
你的那个是什么牌子和型号的?
我看是不是性价比高一些。
我quote了一下3M的dealer,all around是$600。
我现在新的问题是
1) 狗会把film给弄坏吗?
2) windshield要不要上?
x*b
发帖数: 5723
35
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
$600太贵了,现在好一点的膜都可以过滤掉50%或以上的热量,尤其是Ceramic,所以这
个不是衡量因素了。另外Windshield不要装,至于狗这个问题我真的不知道,但是应该
不会吧。
具体哪个牌子的我也不清楚,得打电话去问问,但是他们家用的膜一直都不错,湾区知
名度很好。
http://www.yelp.com/biz/mr-tint-san-jose
Y****a
发帖数: 17170
36
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?

同学,我不在弯曲。
那你上的是啥膜? 我要看参数。嘿嘿
d*********n
发帖数: 1315
37
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
贴这个膜的价格是多少?
z**s
发帖数: 314
38
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
这让我们在Goupon找到49块贴3M的情何以堪。。。
x*b
发帖数: 5723
39
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
我X3上的是他们家的Ceramic,但是牌子我真不记得了。不过有一个参数我记得很清楚
就是我的30-40%的深浅度可以阻挡59%的heat。
我的Outback上的还是他们家最普通的那个膜,也就是$300 all around的那种。号称也
是50%深浅度的可以阻挡51%的heat,但是我个人觉得还是没法和我X3上的Ceramic比。
我X3在湾区最热的那几天(over 100F)空调都只用开第一档。下次换车我去Premier试试
Spectra Photosync,据说这个才是Tint中的高富帅。
Y****a
发帖数: 17170
40
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?

你这个也不便宜啊。
Y****a
发帖数: 17170
41
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?


Spectra Photosync,确实很强。 隔热太厉害了。
我去问问。
Y****a
发帖数: 17170
42
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?


我今天下午research的结果是Spectra Photosync 在加州还可以,
其他的州太麻烦了,找个dealer都费劲的要死,万一要来个warranty就烦了。
我现在准备50% all round,
至于windshield 我考虑一下是否要上90%的,
现在主要是觉得贴sticker的时候会不会影响到膜。
然后就是狗狗的爪子的问题了。 这也是我比较关心warrenty的原因。
3M的crystaline 比Spectra Photosync 只差一点点,而且红外的过滤更强。也便宜些。
可能我还是去走3M的路线了,
x*b
发帖数: 5723
43
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
恩,Spectra Photosync走的是高端路线,主要客户都是luxury/exotic cars。普通车
贴的话从成本上算肯定性价比大打折扣,因为一般中等大小的4门车贴一下都得小一千
甚至过千。
综合起来还是Ceramic的Tint最合适。

些。
Y****a
发帖数: 17170
44
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?

我总觉得这个公司的经营有问题,比较山寨的感觉。
首先,网站太糟糕了,都不知道去哪里买
其次,居然在加州这个贴膜最严格的州做生意,还怂恿客户说从没有客户因为贴膜被抓
,我叉居然有这样做生意的。
如果真的想好好做生意,还不如搬去Vegas等热的地方,
高端路线的市场又小,其实他的产品只有这一个是很强的,其他的也就那样。
我觉得它的命运是被3M收购。没准这就是它的目的。
x*b
发帖数: 5723
45
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
那是因为他们家的膜很浅的颜色(比如70%)就可以达到比ceramic 30%更好的效果,自然
就不用贴深色,也就不怕抓了。要知道美国绝大部分的市售车型出厂玻璃的颜色就是80
%左右,而并不是全透明,所以70%几乎没差别。

★ 发自iPhone App: ChineseWeb 8.6
Y****a
发帖数: 17170
46
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?

80
没有, 他家是怂恿说加州的客户上55和65的都没有被抓到过。嘿嘿
anyway,我明天再给他们打个电话问问具体情况,今天居然还没有人接。
x*b
发帖数: 5723
47
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
我肯定上55%。我现在30%都没被抓过,55% is pretty safe.

★ 发自iPhone App: ChineseWeb 8.6
A****7
发帖数: 1246
48
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
问个很傻的问题,怎么知道我的车窗有没有Tint过呢?
x*b
发帖数: 5723
49
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
Tint是一层film贴在玻璃的内侧,所以能直接摸出来。
A****7
发帖数: 1246
50
来自主题: Automobile版 - 有谁上了3M的Crystalline Tint?
谢谢
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