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全部话题 - 话题: lattices
1 2 3 4 5 6 7 8 下页 末页 (共8页)
f******r
发帖数: 2975
1
来自主题: Mathematics版 - A lattice question
Lattice is a discrete subgroup of Euclidean Space
Suppose I have one lattice L now,
choose some deep holes of the lattice P0,P1,..Pn
Construct L'= L+a_0P0+a_1P1+...+a_nPn
where a_0,a_1,...a_n are either 0 or 1.
Now I am thinking whether L' is a lattice
I guess it is but I don't know how to prove it
Here is my step for addition
Let L1,L2 be two points of the lattice L
L1'=L1+a_0P0+a_1P1+...+a_nPn
L2'=L2+b_0P0+b_1P1+...+b_nPn
L1'+L2' = L1+a_0P0+a_1P1+...+a_nPn+L2+b_0P0+b_1P1+...+b_nPn
then I don't

发帖数: 1
2
U.S. Congress members request block of Lattice Semiconductor sale
Dec. 6, 2016 9:51 AM • SA Editor Eric McCaffrey
Previously (November 28): Lattice Semiconductor buyer linked to China's
State Council
Twenty-two members of Congress have submitted concern arguing potential for
disruption of the U.S. military supply chain and induction of reliance on
internationally-sourced technology for vital U.S. Department of Defense
programs after direct connection to China's government was made known.
W... 阅读全帖
m*******a
发帖数: 371
3
这个是CS的,我们的lattice就是一系列数学坐标,square lattice直接就可以用
matrix表示就行了,不知道其他形状的hexagonal lattice怎么在Matlab里面用数学表
l*****n
发帖数: 1679
4
how many equivalent {111}planes in an orthorhombic lattice?
how many equivalent {122}planes in an orthorhombic lattice?
how many equivalent {123}planes in an orthorhombic lattice
谢谢
l*****l
发帖数: 222
5
【 以下文字转载自 Physics 讨论区 】
发信人: leontel (路,见不平), 信区: Physics
标 题: 问一下surface energy及lattice energy和温度的关系
关键字: 表面能 晶格能 温度 关系
发信站: BBS 未名空间站 (Thu Jun 16 14:24:05 2011, 美东)
请问从热力学角度看surface energy和lattice energy vs temperature的关系应该是
什么呢?定性的看晶格能随温度变化的幅度应该大于表面能,不知道有没有具体一些的
分析能。比如可以到定量的级别的。
l**********r
发帖数: 4612
6
【 以下文字转载自 gardening 讨论区 】
发信人: linuxbeginer (linux), 信区: gardening
标 题: fence的lattices算不算fence的高度?
发信站: BBS 未名空间站 (Mon Jun 17 01:22:10 2013, 美东)
好像city code 上没写。一般lattice算不算高度?
l*****l
发帖数: 222
7
【 以下文字转载自 Physics 讨论区 】
发信人: leontel (路,见不平), 信区: Physics
标 题: 问一下surface energy及lattice energy和温度的关系
关键字: 表面能 晶格能 温度 关系
发信站: BBS 未名空间站 (Thu Jun 16 14:24:05 2011, 美东)
请问从热力学角度看surface energy和lattice energy vs temperature的关系应该是
什么呢?定性的看晶格能随温度变化的幅度应该大于表面能,不知道有没有具体一些的
分析能。比如可以到定量的级别的。
t**i
发帖数: 688
8
You may not like the preset format/template in lattice for publication
purpose, however, for quick plotting of large sized, multi-leveled multi-
factored data, lattice offers a handy way to explore the data. Plus, its
powerful, could-be complicated and customizable panel functionalities offers
great flexibilities in exploring the same set of data on one page through
different angles/ways of plotting.
j*******g
发帖数: 2140
9
没有margin,可以放很多图。 不过margin的问题用par设置就行了。而且似乎所有坐标
range都得一样。我同事上回把200个图放在一页,没用lattice,还是看得清清爽爽的。
透露个小秘密,lattice的作者,就是我同学,一个小印。。

latti
t***t
发帖数: 6066
10
来自主题: SanFrancisco版 - 问个公司:Lattice Engines (转载)
【 以下文字转载自 JobHunting 讨论区 】
发信人: tryst (云淡风轻), 信区: JobHunting
标 题: 问个公司:Lattice Engines
发信站: BBS 未名空间站 (Thu Sep 25 10:17:56 2014, 美东)
融资三轮
2008年A轮1.7m
2012年C轮20m
2014 seed 5m
这是啥意思?C轮过了又来一轮seed?
s*******r
发帖数: 592
11
来自主题: Exchange版 - 转全新UGG lattice cardy,size7
默认版规。
转一双全新的7号酒红色UGG lattice cardy 3066,无盒,$99+邮费。
里层是全羊毛的白色绒绒,外面的编织物是羊毛混纺的。很暖和很柔软。官网卖$160.
可以有3种穿法,挺实用的一双鞋。
l**********r
发帖数: 4612
12
来自主题: gardening版 - fence的lattices算不算fence的高度?
好像city code 上没写。一般lattice算不算高度?
a*******r
发帖数: 344
13
Section Properties for Latticed Members of San Francisco–Oakland Bay Bridge
Journal of Bridge Engineering
Vol. 5: 156-164 (Volume publication date: May 2000)
DOI: 10.1061/(ASCE)1084-0702(2000)5:2(156)
http://ascelibrary.org/doi/abs/10.1061/(ASCE)1084-0702(2000)5%3
哪位帮忙发到 a*******[email protected]
十分感谢!
J*******3
发帖数: 1651
14
how to easily write down the lattice vectors, for instance, graphene, or
nanotube, in the input file?
l*****l
发帖数: 222
15
请问从热力学角度看surface energy和lattice energy vs temperature的关系应该是
什么呢?定性的看晶格能随温度变化的幅度应该大于表面能,不知道有没有具体一些的
分析能。比如可以到定量的级别的。
D*********Y
发帖数: 3382
16
来自主题: Quant版 - 如何在c++里存储lattice
我想做个binomial model。要建立一个lattice class。
我现在想的是放在matrix里面,row和column来表示node的位置。这样的话就有很多
element是空的。我觉得好似不efficient。
请教一下该如何在c++里面处理这个数据结构呢?
谢谢!
t**i
发帖数: 688
17
For simple case as twp level factors, plot coding is not that clumsy. But
if you have a factor of 16 levels and you want to obtain individual plot for
each level and you want them shown on the same page, lattice is the way to
go.
q**j
发帖数: 10612
18
你的意思是说lattice比普通的plot好在有很多的preset的format/template,所以写
code会快些?那么它容易customize吗?
o****o
发帖数: 8077
19
I have the same feeling: lattice比普通的plot好在有很多的preset的format/
template
but I don't like them and customize my own using grid or basic graphics
q**j
发帖数: 10612
20
多谢了。lattice/trellis的大名早就听说了。我总是犹豫应该应该投资些时间精力多
了解一些。
o****o
发帖数: 8077
21
yes I used lattice a lot for DEA, but not very good at customizing it for
presentation
don't have that much time to dig further

offers
q**j
发帖数: 10612
22
BSO认识牛人!我觉得lattice肯定还有别的好处吧,否则怎么会评价这么高?
s*****r
发帖数: 223
23
来自主题: Statistics版 - R-lattice broken y-axis?
我想用lattice package 画一个图,如果broken y-axis会好的多, 但我怎么都找不到
方法的到 这个broken y-axis. 我用log scale, 但不是太理想。
是不是这个package没有, broken y axis 这个功能?
谢谢
w*******y
发帖数: 60932
24
I came across Ugg Australia boots at Link:
http://www.thetannery.com/Search.aspx?g=3&bid=107&dept=79&cat=8
priced lower than anywhere else so far.
They are listed on the Ugg Australia website as an authorized online
retailer : Link:
http://www.uggaustralia.com/on/demandware.store/Sites-UGG-US-Si
.
UGGAustralia
COZY II
$33.42 USD
UGGAustralia
LATTICE CARDY
$51.98 USD
UGGAustralia
CLASSIC SHORT
$55.70 USD
UGGAustralia
CLASSIC TALL
$66.84 USD
UGGAustralia
BAILEY BUTTON
$59.41 USD
UGGAustralia
CLAS... 阅读全帖
q********g
发帖数: 10694
25
来自主题: _Molecular_Simulation版 - 热导率计算的in文件
相关搜索: 热导率, 文件, 计算
作者: zhxlhdd2008 于 2010-10-28 16:23
看到有不少人在找热导率计算方面的in文件,我就贡献三个in文件吧,仅供参考。
同时,附件里贴出了我的计算结果。EMD的输出结果(compute heat/flux command
+compute tc command的计算结果)中, “ac.dat”(见附件中的"ac.wmf")是热流自
相关函数(我已经修改了compute_tc.cpp,目前输出的是normalized HCACF,但结果中
给出的还是没有归一化的热流自相关函数,但形状和归一化的是一样的,请注意!)随
m的变化,"tc.dat"(见附件中的"tc.wmf")是热导率随m的变化(m的涵义请参看热导率
计算的Green Kubo离散化公式,见附件"Comparison of atomic-level simulation
methods for computing thermal conductivity”中的(9)式),"tc_time.dat"(见附
件中的"tc_time.wmf")是热导率随时间的变... 阅读全帖
j***y
发帖数: 882
26
来自主题: JobMarket版 - Hire Deployment Support Engineer in Beijing
Position: (Senior) Deployment Support Engineer

Location: Zhongguancun, Beijing, China

Contact: k**[email protected]

Lattice Engines (晶格科技) is an U.S based fast growing big data company
and the leader in B2B sales and marketing intelligence software. We are
expanding our business to China and launched our Beijing office recently.

Lattice Engines is privately held and backed by Sequoia Capital. The job
title and compensation will depend on candidate’s experience. Please ... 阅读全帖
j***y
发帖数: 882
27
【 以下文字转载自 JobMarket 讨论区 】
发信人: jelty (TT is refreshing), 信区: JobMarket
标 题: Hire Deployment Support Engineer in Beijing
发信站: BBS 未名空间站 (Thu Apr 19 04:55:04 2012, 美东)
Position: (Senior) Deployment Support Engineer

Location: Zhongguancun, Beijing, China

Contact: k**[email protected]

Lattice Engines (晶格科技) is an U.S based fast growing big data company
and the leader in B2B sales and marketing intelligence software. We are
expanding our business to China and launched our Beijing... 阅读全帖
f***y
发帖数: 4447
28
http://bbs.netbig.com/thread-2702025-1-2.html
一期9篇研究性文章,1/3是科大的,郭光灿组两篇,潘建伟组一篇
另外在news and views还有一篇点评潘建伟的工作
etters
Experimental investigation of the no-signalling principle in parity–time
symmetric theory using an open quantum system - pp642 - 646
Jian-Shun Tang, Yi-Tao Wang, Shang Yu, De-Yong He, Jin-Shi Xu, Bi-Heng Liu,
Geng Chen, Yong-Nan Sun, Kai Sun, Yong-Jian Han, Chuan-Feng Li & Guang-Can
Guo
doi:10.1038/nphoton.2016.144
The violation of the no-signalling principle — information can be
tr... 阅读全帖
o*****p
发帖数: 2977
29
来自主题: Military版 - 美国宣布了对中兴的出口禁令
https://zhuanlan.zhihu.com/p/35894127?group_id=970494281726828544
4月17日,美国宣布了对中兴的出口禁令,我们应该如何看待这起事件?
至少可以先赚点钱。
时间回到了一个多月前,
3月23日是个星期五,这一天中国时间的凌晨,美国总统特朗普签署了301调查备忘录,
计划对中国价值500亿美元的进口商品征收关税,结果消息传来,中国股市恐惧性大跌。
当天晚上,我连夜写了篇文章
“基本上按照比较坏的情况打算,影响也就是0.1%左右,不会影响中国经济增长大局。
再强调一次,中国经济是否增长,不是取决于美国人买不买我们的东西,而是取决于作
为中国老百姓的我们买不买东西。所以今天我一看上证指数大跌3.39%,跌到了3152.76
点,很多股票甚至跌停了,于是又入手买了些,不知道这么恐慌干什么。”
事实证明,我当时的想法是对的,因为股市很快就恢复了。所以每次美国人要对中国干
什么事情,我就感觉是个赚钱的机会。
北京时间4月17日凌晨,也就是美东时间4月16日,美国商务部在宣布,将禁止美国公司
向中兴通讯销售零部件、商品、软件和技术7年,直... 阅读全帖
j***y
发帖数: 882
30
【 以下文字转载自 Database 讨论区 】
发信人: jelty (TT is refreshing), 信区: Database
标 题: Immediate opening in New York: Analytics Engineer
发信站: BBS 未名空间站 (Thu Jun 2 23:21:40 2011, 美东)
Please email to k**[email protected] with title 'Immediate opening in
New York: Analytics Engineer' if you are interested. thanks.
Role: Analytics Engineer
Location: New York
Responsibilities:
The analytics engineer will develop and execute complex business and
database analytics. These activities are a critical part of ou... 阅读全帖
j***y
发帖数: 882
31
Please email to k**[email protected] with title 'Immediate opening in
New York: Analytics Engineer' if you are interested. thanks.
Role: Analytics Engineer
Location: New York
Responsibilities:
The analytics engineer will develop and execute complex business and
database analytics. These activities are a critical part of our customer
deployments, and analysts are expected to identify and resolve issues
relating to data gathering and analytic model building. The analyst will
work closely with... 阅读全帖
t*******r
发帖数: 22634
32
来自主题: Parenting版 - 一道小学数学题
好吧,马工这个大杀器有个大名词叫 (prime) factor lattices
http://www.mathrecreation.com/2008/09/factor-lattices.html
其实也不一定用那个 lattice 结构,可能也有其他的 lattice 结构
更方便。。。总而言之把这个问题,转化为高维拓扑空间的拓扑问题,
然后切个边界,数一数,就可以走人了。。。
当然,骨灰级数学家们可能有更刁钻的办法。。。但马工们一天那么多
事儿也来不及刁钻。。。反正更刁钻的办法一般也快不了多少了,
而且碰到实际问题再加几个限制条件的话,骨灰级数学家的刁钻
办法搞不好也会爆掉。。。其实最关键的,主要还是英特尔的芯片
也没几个钱,达特茅斯地下室写 JavaScript 的炮灰们也没几个钱
。。。所以剩下的具体马 code 的事儿,让月光啥的随便写个
JavaScript 出货就完事了。。。
o*******r
发帖数: 14
33
来自主题: Oregon版 - 两华人涉嫌骗取高科技晶片
美国联邦检察当局星期二(12月18日)公布的文件显示,两名中国公民因为试图在美国
非法购买敏感高技术产品而在去年9月遭到指控。
这两位名叫 Wan Li Yuan 和 Jiang Song 的中国人早已回国,目前生活在中国,没有
被逮捕,但是在2011年9月28日遭到控告。
根据指控,这两个人伪造身份,冒充代表一家在纽约的公司,试图从俄勒冈州的
Lattice 半导体公司(Lattice Semiconductor)购买高技术计算机芯片。
他们所希望购买的称为“程序逻辑装置”的两种型号芯片都属于美国国家安全控制产品
,需要得到美国商务部的批准才能出口。
军用级别
这些装置可以用于包括采矿等民用工程。但是当局表示,这两个人特别希望购买以陶瓷
而不是塑料封装的芯片。陶瓷封装的芯片属于高级的军用级别,可以耐受极高和极低温
等恶劣环境的冲击。
当局说,分别自称为尼古拉斯·布什和贾森·Jiang的Wan Li Yuan 和 Jiang Song 告
诉Lattice公司,他们需要把这些程序逻辑装置用于在美国的煤矿和石油开采工程。
在他们的行动受到怀疑之后,Lattice 公司向美国联邦调查局报告... 阅读全帖
t**********m
发帖数: 205
34
http://blog.vixra.org/about/
1
CV: Philip Gibbs
Nationality: British
Education Summary
Secondary school: Currie High School, Midlothian, August 1972 - July 1978
Scottish higher grades:
English B, Mathematics A, Physics A, Chemistry A, Engineering Science A
Scottish sixth year studies:
Physics A, Maths algebra A, Maths analysis A, Maths Statistics A
higher education:higher education:higher education:higher education:higher
education: higher education: higher education:higher education: higher
edu... 阅读全帖
c***d
发帖数: 756
35
来自主题: Military版 - 普鲁士蓝解毒机理
狗了你读得懂么?Fe4III[FeII(CN)6]3是不溶于水的普鲁士蓝,
KFe3III[FeII(CN)6]3, K2Fe2III[FeII(CN)6]3是可溶于水的普鲁士蓝。
All of these names refer to the blue colored complex of ferric-
hexacyanoferrate(II) (Fig. 1.) with the empirical formula of Fe4III[FeII(CN)
6]3 (Monona, 1994). There are a number of related hexacyanoferrate compounds
, inaccurately called PB, such as potassium hexacyanoferrate KFe3III[FeII(CN
)6]3, K2Fe2III[FeII(CN)6]3 and ammonium hexacyanoferrate NH4Fe3III[FeII(CN)6
]3 (Beck, 1987). The potassium form o... 阅读全帖
j***y
发帖数: 882
36
Feel free to send me your resume with position name to jeltykang@gmail for
referral
or apply on company website directly. Some new openings may not be there yet
and some are inactive though.
http://www.lattice-engines.com/about-us/jobs
Technical Openings:
Director of Software Engineer
Manager of Platform Operations
Sr Product Manager
Sr Software Engineer
Sr QA Engineer
SQL Server/NoSQL DBA
About Lattice
Lattice is an early innovator in one of the hottest areas of the marketing
technology market:... 阅读全帖
z*****1
发帖数: 10
37
来自主题: Living版 - 后院建Shed 带来的烦恼
在后院建了一个Shed(大小都符合City code),但旁边邻居(老白)硬说有碍观瞻,要求
在fence上加lattice. 同意加建之后,邻居只愿意share25%的cost.
若有同样经历,请分享您的看法:
1. 有必要加lattice吗?如果没有violate city code 和任何非法。
2.如何劝说邻居平分cost? 实际上也只是多付200刀, 但将来修fence/lattice, 花销
怎么算?
多谢!
a*****g
发帖数: 19398
38
来自主题: Parenting版 - 5年纪数学题,请教
不是 lattice
lattice 是毁掉孩子空间想象力的一种办法
它把 place value 全部扔掉,斜着乱算。
其实讲英语的孩子 place value就是烂,不扔掉也和没有差不多。
这也就是 lattice 还能存在的原因。
a*****5
发帖数: 94
39
来自主题: Immigration版 - 转审稿:Fluid Phase Equilibria
Title: Investigating the solubilization of oil in Gemini surfactant micelles
by using lattice Monte Carlo simulation
Abstract: In this study we investigated the mixing behavior of the Gemini
surfactants (T11H1SnH1T11 ,n=2,4,6,8) and oils (Tn ,n=2,3,4 ) in aqueous
solutions by using lattice Monte Carlo simulation method. The results show
that adding oil to the surfactant solution results in decreasing the CMC.
Investigating the changes of the CMC vs. the spacer length shows that
increasing the sp... 阅读全帖
c*******9
发帖数: 9032
40
运行一个简单的图像识别深度神经网络(不包括学习)需要什么性能的 FPGA。iphone
7 的好像不够吧。
http://www.forbes.com/sites/aarontilley/2016/10/17/iphone-7-fpga-chip-artificial-intelligence/#3ff97d11337d
It’s been more than a month since teardown shops like iFixit and Chipworks
took apart and dissected Apple’s iPhone 7. The biggest surprise remains
Apple’s decision to dual source its LTE modems from both Qualcomm and Intel.
But there was one little chip that has gone mostly unnoticed. Inside the
iPhone 7 is a field-programmable gate arr... 阅读全帖
f******r
发帖数: 2975
41
来自主题: Mathematics版 - how to prove this obvious thing
I have one n dimensional lattice L
the minimal norm of the lattice is (2d)^2
Let d be the radius of an n dimensional sphere
to me it is obvious that
the volume of this sphere
<= the volume of the lattice voronoi cell
but someone says that I have to prove it
I wonder how
thanks a lot
c***y
发帖数: 233
42
来自主题: NanoST版 - 也求问两个晶体的问题
1.一般来说,半导体,例如CdS,的cubic和hexagnol的电子眼射(SAED)有区别么?我的意思
直接看出来的区别,点排列的顺序?怎样通过单晶的ED算lattice spacing 呢?
2. 对hexagnol,比如CdS,知道lattice constants (a &c), 怎么算lattice spacing 呢
?
p*****0
发帖数: 1100
43
前段时间投了篇关于“在不同氧气压下生长ZnO”的文章,审稿人提出问题:
The samples fabricated in high oxygen pressure result excessive oxygen in
the samples. The O atoms enter the lattice as interstitial O atoms or occupy
O atom positions in the lattice, or enter the lattice with any other
situations?
氧气环境下生长ZnO,氧气是替换ZnO中的O原子,还是成为间隙原子,或者是其他的状
态?
从没有想过这个问题,也没有学过材料的相关课程,不知道这个问题该怎么回答。看了
很多文章,都没有提及这个问题。不知道版上有没有对这个问题熟悉的,请给点参考意
见。谢谢!
p*****0
发帖数: 1100
44
前段时间投了篇关于“在不同氧气压下生长ZnO”的文章,审稿人提出问题:
The samples fabricated in high oxygen pressure result excessive oxygen in
the samples. The O atoms enter the lattice as interstitial O atoms or occupy
O atom positions in the lattice, or enter the lattice with any other
situations?
氧气环境下生长ZnO,氧气是替换ZnO中的O原子,还是成为间隙原子,或者是其他的状
态?
从没有想过这个问题,也没有学过材料的相关课程,不知道这个问题该怎么回答。看了
很多文章,都没有提及这个问题。不知道版上有没有对这个问题熟悉的,请给点参考意
见。谢谢!
n*****b
发帖数: 2235
45
来自主题: Physics版 - Wilson去世了
http://cornellcas.tumblr.com/post/53215439683/physics-nobel-lau
Physics Nobel Laureate Kenneth Wilson Dies
Physics visionary Kenneth G. Wilson, winner of the 1982 Nobel Prize in
Physics, died at the age of 77 on June 15 in Maine of complications
following a lymphoma.
“Ken Wilson was one of a very small number of physicists who changed the
way we all think, not just about specific phenomena, but about a vast range
of different phenomena,” said Steven Weinberg, a fellow physics Nobel
Laureate.
The... 阅读全帖
w****o
发帖数: 20
46
From free-elecron model (empty lattice model) in 3D simple cubic lattice,
assume no lattice field and thermal perturbation:
n=2*Vk*Vr/(2*Pi)^2
=2*((4*Pi/3)*(Pi/a)^3)*a^3/(2*Pi)^2
=Pi/3
=1.047 (per atom, i.e., per unit cell)
o***s
发帖数: 42149
47
美国是世界公认的在内幕交易监管上最有效率的国家之一,尽管如此,仍然有人为了利益不惜以身试法。近日,美国证券交易委员会(以下简称SEC)官网就披露了一起涉及中国籍男子的内幕交易案。
记者查询到的相关起诉书复印件显示,涉案男子名Yin Shaohua(英文名Michael),此前间接通过五个中国籍人士名下的美股经纪账户,累计持有超过5600万股梦工厂(Dream Works)股票,这五个中国人中包括了Yin Shaohua年近80岁的父母。当康卡斯特公司收购梦工厂的消息公布后,后者股价在两个交易日内暴涨47.3%。
SEC称这五个账户合计从梦工厂交易中获利约2900万美元。起诉书同时指出,不仅梦工厂,上述账户对58同城、携程旅行网及巨人网络3家中概股的投资也疑点重重。
内幕交易细节首度曝光
根据起诉书,这名Yin姓男子在2016年4月4日~25日,通过名义上由住址位于中国北京的五个美股交易账户,持有大量的梦工厂股份,经查,前述5个账户全部由Yin本人控制,五个账户持有人中包括了Yin的父母。
在4月的上述三周里,这五个账户分别买入约215万股梦工厂股份,五个账户累计持有梦工厂交易总量的16... 阅读全帖
s********n
发帖数: 2939
48
来自主题: Military版 - 普鲁士蓝解毒机理
为什么一帮人就喜欢动嘴皮子不喜欢动手狗一下?明明说了是Fe4[Fe(CN)6]3,哪来的
钾?
https://en.wikipedia.org/wiki/Prussian_blue
Prussian blue
From Wikipedia, the free encyclopedia
This article is about the pigment. For the musical duo, see Prussian Blue.
See also: Midnight blue
Prussian blue
IUPAC name[hide]
Iron(II,III) hexacyanoferrate(II,III)
Other names[hide]
Berlin blue
Ferric ferrocyanide
Ferric hexacyanoferrate
Iron(III) ferrocyanide
Iron(III) hexacyanoferrate(II)
Parisian blue
Identifiers
CAS number 14038-43-8
PubChem ... 阅读全帖
h**********c
发帖数: 4120
49
来自主题: Military版 - 脱氧核醣核酸
Graphene is an atomic-scale hexagonal lattice made of carbon atoms.
it is an allotrope of carbon in the form of a two-dimensional, atomic-scale,
hexagonal lattice in which one atom forms each vertex. It is the basic
structural element of other allotropes, including graphite, charcoal, carbon
nanotubes and fullerenes. It can also be considered as an indefinitely
large aromatic molecule, the ultimate case of the family of flat polycyclic
aromatic hydrocarbons.
x****6
发帖数: 4339
50
"a random matrix (sometimes stochastic matrix) is a matrix-valued random
variable—that is, a matrix some or all of whose elements are random
variables. Many important properties of physical systems can be represented
mathematically as matrix problems. For example, the thermal conductivity of
a lattice can be computed from the dynamical matrix of the particle-particle
interactions within the lattice"

the
正。
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