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sending EM waves to Mars

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sending EM waves to Mars
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emptymalei / 值得思考的问题
Last active December 18, 2015 21:29
有趣的问题
洗澡喜欢用手搓灰，发现搓灰的最容易的时候是洗澡完了出来，身上的水快晾干还没干的时候，搓灰最能搓出来。这是为什么？
http://www.guokr.com/question/477206/
为什么风扇的叶片使用一段时间后,会聚集一些粉尘(或者污垢)呢?
http://www.guokr.com/question/478575/
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emptymalei / QM Review
Created November 9, 2013 20:55
QM Review
$$
\newcommand{\ud}[1]{{#1^{\dagger}}}
\newcommand{\bra}[1]{\left\langle #1\right|}
\newcommand{\ket}[1]{\left| #1\right\rangle}
\newcommand\Tr{\mathrm{Tr}}
\newcommand{\braket}[2]{\langle #1 \mid #2 \rangle}
\newcommand\d{\mathrm{d}}
\newcommand\I{\mathbb{I}}
\newcommand{\avg}[1]{\left< #1 \right>}
$$
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emptymalei / frontendDevlopmentBookmarks.md
Created December 25, 2013 08:17 — forked from dypsilon/frontendDevlopmentBookmarks.md
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emptymalei / Pacifier.md
Last active January 3, 2016 10:09
Pacifier
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emptymalei / 0_reuse_code.js
Created February 8, 2014 04:09
Here are some things you can do with Gists in GistBox.
// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console
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emptymalei / frontendDevlopmentBookmarks.md
Created March 15, 2014 07:44 — forked from dypsilon/frontendDevlopmentBookmarks.md
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emptymalei / 引力波和背景辐射.md
Created March 17, 2014 09:46
引力波和背景辐射.md

首先，我们这里探测引力波的方法是用的微波背景辐射，新闻中说了，大家是在找 B mode，那么自然的就有那么几个问题：

  1. 什么是微波背景辐射？
  2. 什么是 B mode？
  3. 什么是引力波？
  4. 为什么可以通过 B mode 来探测引力波？

什么是背景辐射

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emptymalei / Writing Tools Writeup.markdown
Created April 7, 2014 18:07 — forked from mojavelinux/Writing Tools Writeup.markdown
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emptymalei / gist:f79b560a53d6e6ad4853
Created May 6, 2014 18:55
brew install r error
➜ ~ brew install R
==> Using Homebrew-provided fortran compiler.
This may be changed by setting the FC environment variable.
==> Downloading http://cran.rstudio.com/src/base/R-3/R-3.1.0.tar.gz
Already downloaded: /Library/Caches/Homebrew/r-3.1.0.tar.gz
Error: undefined method `[]' for Formula:Class
Please report this bug:
https://github.com/Homebrew/homebrew/wiki/troubleshooting
/usr/local/Library/Formula/r.rb:36:in `install'
/usr/local/Library/Homebrew/build.rb:165:in `install'
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emptymalei / inertialMassGravitationalMass.md
Created May 27, 2014 15:37
inertialMassGravitatialMass.md