Author Archives: Yifan Peng

About Yifan Peng

PhD student in UD CIS. Area of interest: sentence simplification, relation extraction, text mining, natural language processing, computational linguistic.

《Deep Learning》(深度学习)中文版开放下载

Deep Learning》(深度学习)是一本皆在帮助学生和从业人员进入机器学习领域的教科书,以开源的形式免费在网络上提供,这本书是由 Ian Goodfellow、Yoshua Bengio 和 Aaron Courville 合力打造。


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D-link DIR-628 connection dropouts


I am using a D-link DIR-628 and experiencing regular Wireless signal dropout. It is occurring on multiple wireless devices in my home, including a Macbook, an iPad, and an iPhone. It is hard for them to connect to the router when I come back home, and it frequently loses connection thereafter.

I am sure there is no problem of the incoming internet because my desktop that connects the internet via ethernet never dropouts. BTW, I am using a 5GHz wireless network, so there shouldn’t be many conflicts.

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How to use xRDP for remote access to Ubuntu

Since the current desktop manager of Ubuntu does not work with xRDP, an alternative desktop manager needs to be installed. In this post, we will use XFCE.

Install xRDP and XFCE

sudo apt-get install xrdp xfce4 xfce4-terminal gnome-icon-theme-full tango-icon-theme

Configure xRDP

First, create an .xsession file in the home directory.

echo xfce4-session >~/.xsession

Then edit the startup file for xRDP /etc/xrdp/

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How to install pip and create virtualenv on Windows without administrative permission

Since Python 2.7.9, pip is released together with the Python. But I still cannot find it when our administrator installed the latest python on my PC. How to install pip, then create virtualenv on Windows without the administrative permission?

  1. Download
  2. Run python --user. It will install pip locally.
  3. Install virtualenv by running python -m pip install --user virtualenv. This will install the package of virtualenv
  4. Run python -m virtualenv ENV to create a new virtual environment. ENV is a directory to place the new virtual environment.
  5. Activate the script by running ENV/Scripts/activate.bat.

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Using Bibtex in MS Word 2015 (Mac OS)

BibTeX is reference management software for formatting lists of references. It makes it easy to cite sources in a consistent manner. However, BibTex is typically used together with the LaTeX document preparation system.

On the other hand, Microsoft Word is still the most commonly used text editor and used in the group to share documents. Thus, I use BibTex to manage the bibliography and use MS Word to write documents.
One of the most famous reference manager software integrated in Word is EndNot, but unfortunately it is a very expensive and not open-source software. In Windows OS, there is a awesome plug-in called “Bib4Word”, but it is not usable in Max OS.

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Where to place you own .sty or .cls files, to make them available to all my .tex files?

Suppose you have defined a package or a class, but how do you make it available at all times? One way is to just place it in the same folder as the .tex file, but that’s not what I’m after here. This post will tell you a way to “install” the package centrally on your computer.

1. Find out the directory. First, use this command at the command prompt to find out where your TeX home directory is.

kpsewhich -var-value=TEXMFHOME
OS Location
Windows C:/Users/stefan/texmf
Unix-type ~/texmf/
Mac ~/Library/texmf

2. Place files in the “right place”. Following the TeX directory structure, you should place your file in the “right place” like ~/texmf/tex/latex/packagename/packagename.sty. For a TDS-conformant system (TeX Directory Structure), the “right place” for a LaTeX .sty file is a suitably-named subdirectory of texmf/tex/latex/. For a full list of “right place”s, please see LaTeX/Installing Extra Packages. Moreover, for the beamer style, put the theme under beamer/themes/ with “color”, “font”, “inner”, “outer”, and “theme” in seperated subdirectories.

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Dropbox icon is not working Xubuntu 16.04 LTS

After upgrading to Xubuntu 16.04, I found that the dropbox icon stopped working. The icon is black with a red slashed zero. I cannot click on it to bring up the dropbox menu.

The reason is that Dropbox starts to use “indicator area” for their tray icon instead of “notification area”. The problem can be fixed by running

$ dropbox stop && DBUS_SESSION_BUS_ADDRESS="" dropbox start


$ dropbox stop && dbus-launch dropbox start