This article presents how to customize the header, navigation symbols and footer in Beamer.1. Header, Navigation symbols and FooterFig. 1: Header, navigation symbols and footer in Beamer2. Get rid of header, navigation symbols and footer% get rid of header navigation bar %\setbeamertemplate{headline}{} %get rid of bottom navigation symbols %\setbeamertemplate{navigation symbols}{} % get rid of footer %\setbeamertemplate{footline}{}3. FooterIt is quite common to add text (such as the presenter’s name, the presentation’s title, university, and more) to the bottom of one or more sli ...继续阅读 (25)

NetworkXonly provides basic functionality for visualizing graphs. It looks ugly to draw trees with its built-ingraph layout. This article presents how to draw beautiful trees withpygraphvizand convert the format between NetworkX and Graphviz (dot).1. Install PyGraphvizTo installpygraphvizon macOS,$ brew install graphviz $ sudo pip install pygraphviz2. Draw trees with PyGraphvizWe use node positioning algorithms provided by Graphviz for tree drawing.Graphvizis a package for drawing graphs specified in DOT language scripts. It also provides a set of tools that can generate and/or process DOT fil ...继续阅读 (25)

NetworkX is not powerful enough to draw large graphs since it only provides basic functionality for visualizing graphs. This article presents a better way to visualize graphs, i.e. using layouts in Gephi.Step 1. Export NetworkX graphs into a proper formatExport NetworkX graphs into a format that can be read by Gephi, such as.gramph.nx.write_graphmlwrites a graph in GraphML XML format. For instance,filename = 'paris_gtfs_graph.graphml' nx.write_graphml(G, filename)Step 2. Layout in GephiOpen the graph file in Gephi, run an appropriate layout (I usually useYifanHu. Drag nodes manually if necessa ...继续阅读 (32)

本文将LaTeX、Beamer、Markdown使用笔记做一个索引，方便日后查看。1. LaTeX基本应用LaTeX使用笔记：表格LaTeX使用笔记：图片LaTeX使用笔记：表格LaTeX使用笔记：参考文献进阶应用LaTeX使用笔记：数学公式Split long equations into multiple lines in LaTeXLaTeX Application Notes: Pseudocode (with examples)其他A shell script to indent LaTeX documents中文支持：Use XeLaTeX in Texmaker2. BeamerBeamer application notes: a title pageNote-taking: basic knowledge of beamer3. Markdown用markdown制作简单的个人主页在Markdown使用代码高亮SyntaxHighlighter邮件正文插入高亮代码、数学公式 ...继续阅读 (30)

This article presents two notable algorithm typesetting environments:algorithmicandalgorithmicxwith illustrated examples.1. OverviewLaTeX has several packages for typesetting algorithms in form of pseudocode. There are four notable packages:algorithmic,algorithmicx,algorithm2eandprogram[1]. In a nutshell[2]，algorithm – float wrapper for algorithms (provide a floating environment for algorithms).algorithmic – algorithm typesetting environment.algorithmicx – algorithm typesetting environment.algpseudocode – layout for algorithmicx.algorithm2e – algorithm typesetting ...继续阅读 (37)

This article presents two ways to split long equations into multiple lines with and without alignment.1. Split equationsUsemultlineorsplitprovided byamsmathpackage.Usemultlineto split equationswithoutalignment (first line left, last line right)Usesplitto split equationswithalignmentHere are examples:Fig. 1: Illustrated examples to split equations.For more info, refer toUser’s Guide for the amsmath Package.2. The source codeThe corresponding source code is as follows:(i).Use equation: \begin{equation} 1+2+3+4+8x+7=1+2+3+4+4x+35 \\ \Rightarrow x=7 \end{equation} (ii).Use \emph{multline} to spli ...继续阅读 (37)

学校为每个研究者提供一个空间，用于存放个人学术主页，但只能是静态页面。搜了一下，没找到自己满意的模板。后来就想，用markdown编辑好，再转换成html。事实上，这样做还有一个好处，主页可以在不同设备上显示得很好。动手弄了一个，效果还不错，欢迎围观：Qiankun SU at INP-ENSEEIHT.1. 使用Python使用pypandoc，示例代码如下：#!/usr/bin/env python # -*- coding: utf-8 -*- import pypandoc # With an input file: it will infer the input format from the filename output = pypandoc.convert_file('index.md', 'html', outputfile='index-2.html')这样做，只是简单地将markdown转换成html，我的markdown文档包含一些法语字符，不能正常显示，需要手动在html文件指定字符编码，即在html文件头部添加如下一行：encoding = '<meta charset="utf-8">'2. 使用命令行直接在命令行使用pandoc命令，使用-s选项为输出文档添加header和footer，举例如下：# An example pando ...继续阅读 (54)

最近决定买块手表，向来喜欢简约而不简单的东西，看了很多帖子，挑了好几个小时，还是做个笔记吧，方便日后查阅他们的新款。1. 写在前面我的第一块手表是卡西欧，大三时候买的（初衷是买来考研的，不过后来保研了），在当时，对我来说可是第一款奢侈品，现在还记得那会纠结了好几天，还特意去实体店看了一转（网上买比实体店便宜一半），用了好几年，一直很喜欢。第二款手表是天梭机械表，某人送的，后来闹得很不愉快，把手表退回去了。没戴手表有一年多了，还是觉得用手表看时间方便，中途买了个手环，华而不实，几乎就没用过。最近身边有朋友戴DW，恰是我喜欢的极简风格，这激起我买块手表的欲望，看了很多帖子，包括但不局限于：有什么适合年轻人的简约时尚的手表？有哪些好看极简的手表？The 15 Best Minimalist Watches for MenThe 20 Best Minimalist Watches For Men40 Best Minimalist Watches for Men…向来喜欢简约而不简单的东西。手表带日期功能，据说签合同很有用，目前还没体会到，我的上一块手表，每两个月得调一次日期（手表将一个月固定为30还是31天），我觉得有些麻烦。所以，这次挑表，几乎不考虑有日期的款式。看了那么多帖子，翻了那么多官网，以下列出3个我最喜欢的牌子。2. 极简腕表2.1 DWDaniel Welli ...继续阅读 (28)

本人将于2016年11月13日-17日参加MSWiM 2016会议并做报告。1. 关于MSWiM 2016MSWiM 2016,时间：11月13日 – 11月17日地点：马其他，Excelsior Hotel, Great Siege Road, Floriana FRN1810, MaltaACM MSWiM 2016 is the 19th Annual International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems. MSWiM is an international forum dedicated to in-depth discussion of Wireless and Mobile systems, networks, algorithms and applications, with an emphasis on rigorous performance evaluation. MSWiM is a highly selective conference with a long track record of publishing innovative ideas and breakthroughs. MSWiM 2016 will ...继续阅读 (30)

最近看高校招聘要求，通常列出要求论文几区几篇，这里的区是根据中科院JCR期刊分区表来的，而中科院JCR期刊分区表又是根据期刊引证报告JCR制作的，谈起JCR，又不得不说影响因子IF。1. 期刊引证报告期刊引证报告（JCR, Journal Citation Reports），摘抄维基百科如下：Journal Citation Reports(JCR) is anannual publicationby the Intellectual Property and Science business ofThomson Reuters. It has been integrated with theWeb of Scienceand is accessed from the Web of Science-Core Collections. It provides information aboutacademic journalsin the sciences andsocial sciences, includingimpact factors. TheJCRwas originally published as a part ofScience Citation Index. Currently, theJCR, as a distinct service, is based onc ...继续阅读 (34)

写了一个Python脚本，从中科院JCR期刊分区表抽取计算机和电信学科，并按分区排序。1. 数据处理本来只是想从中科院JCR期刊分区表中找一份计算机和电信学科按期刊分区排序的表，可惜没找到。后来在小木虫找到了一份JCR2015影响因子（所有期刊从高到低排序）+中科院分区.xlsx，鉴于表格有些乱，于是写了个Python脚本过滤出自己想要的数据。源代码已分享到我的GitHub，在这里。随着分析深入，发现原表格数据并不准确，比如中科院JCR大类学科应该只有13个，但在表格中却有190个，所以我将其理解成是小类。但这样理解也不准确，因为按照JCR，某个期刊可以同时隶属于多个小类，比如IEEE TRANSACTIONS ON MOBILE COMPUTING同时隶属于Computer science, information systems和Telecommunications。但在该表中，IEEE TRANSACTIONS ON MOBILE COMPUTING只属于电信。再有一个问题就是，该表没有小类的分区，所以会出现某些小类期刊没有1区，比如计算机：硬件。以下所有结果都是从JCR2015影响因子（所有期刊从高到低排序）+中科院分区.xlsx提取，值得注意的是，正好上文提到的一样，结果并不准确，只能是参考。2. 计算机2.1 计算机：软件工程中科院JCR大类学科 中科院JCR大类分区 ...继续阅读 (43)

I learn of the partition table of academic journals issued by Chinese Academic Sciences (中科院JCR期刊分区表) whose subcategories are consistent with JCR categories. For the convenience of access, I excerpt JCR category profile of computer science and telecommunications fromWeb of Science.1. Statistics for categoriesEach journal indexed in JCR is assigned to at least one subject category, indicating a general area of science or the social sciences. Journals may be included in more than one subject category; therefore, when comparing journals across related categories, it is possible to see the same jo ...继续阅读 (21)

This article is to introduce setting up a connection to a virtual private network (VPN) with amazon web services (AWS).1. Set up VPN on the server-side, AWSPlease refer to my previous blog:Windows 8.1 + AWS + VPN.2. Set up VPN on the user-side, OS XStep 1: Create a new serviceSystem Preferences–>Network–> Click+on the bottom-left corner,Interface: select VPN VPN Type: PPTP Service name: type a string as you like, such as 'sparkandshine'ClickCreate.Step 2: Configure VPNFig. 1: Configure VPNFill out the serve address (i.e. AWS EC2 Elastic IPs) and account name,Serve address: XX.XX.XX ...继续阅读 (26)

There are several abbreviations used in the cinema listings in France, such as VO, VF, VOST. What do they stand for?VO: Version Originale, which means the film isn’t dubbed, i.e. original version.VF: Version Française, which means the film is dubbed from its original language into French.VOST: Version Originale Sous-Titrée, which means the film is in its original version (i.e. not dubbed) with French subtitles.VOSTFR: Version Originale Sous-Titrée en FRançais, which means the film is in its original version (i.e. not dubbed) with French subtitles.VOSTFrench: Version Originale Sous-Titrée ...继续阅读 (32)

本文分享欧洲遗产日·法国的开放时间以及如何查询开放场所。1. 简介欧洲遗产日（European Heritage Days）是法国文化部在1984年发起，现在已经是欧洲委员会和欧盟委员会的一项联合行动，涉及50个在欧洲文化条约下签字的成员国，箴言是欧洲：共同的遗产。在遗产日期间，可以免费参观一些平时并不对公众开放的建筑、国家古迹，比如爱丽舍宫（Palais de l’Elysée ，法国总统府以及法国总统官邸）、法国参议院（Le Sénat）。法国的欧洲遗产日是每年9月份的第三个周末（如2016年9月17-18日）。2. 查询开放信息打开法国欧洲遗产日官网（Journées européennes du patrimoine），点击CONSULTER LE PROGRAMME，输入城市名称或者邮编即可查询。3. 更多查询方式巴黎：手机应用Patrimap图卢兹：Accueil – Patrimoine – Toulouse.fr ...继续阅读 (37)

This article shows how to add a MOBI file toKindle for MAC.1. Install Kindle for MACClickhereto download Kindle for MAC and install it.2. Move MOBI filesStep 1: Open Kindle content directoryRight click finder icon in dock –> go to folderType in~/Library/Application Support/Kindle/My Kindle Content/–> goStep 2: Move MOBI files to this folderPS: You can get this directory fromKindle --> Preferences --> Content Folder, as shown below.Fig. 1: The Kindle content directory ...继续阅读 (27)

This article introduces simple regression analysis illustrated with a simple example and shows how to calculate it using Python.1. Simple regression analysis1.1 IntroductionIn layman’s terms, given a bunch of data points \({(x_i, y_i), i = 1, …, n}\),simpleregression analysis is to find a straight line that fits them the best. (two dimensions)$$y=\alpha +\beta \cdot x$$where \(\alpha\) and \(\beta\) are so-calledinterceptandsloprespectively. Such a equation can be used for predicting the unknown value.Before diving into details, let’s take an ...继续阅读 (29)

In this article, the series of posts “Draw with Matplotlib” is organized as a table of contents(TOC) for the convenience of access.BasicDraw with Matplotlib: Basic Steps for Plotting a FigureDraw with Matplotlib: Colors, Markers and Line StylesTypes of graphsDraw with Matplotlib: (Stacked) Bar Charts with error barWork with other modulesNetworkXNetworkX Application Notes: Draw a graph with matplotlibPandas ...继续阅读 (38)

Bar charts (bar graphs) is commonly used to show comparisons among categories (clusters, groups) with rectangular bars. Each bar’s height (vertical bars) or length (horizontal bars) is proportional to the values that they represent. This article presents how to draw basic and stacked bar chart with the Python module Matplotlib.1. Bar charts with error barplt.barmakes a bar plot.plt.barhmakes a horizontal bar plot.plt.barbsmakes a 2-D field of barbs.The rectangle is bounded by(left, left + width, bottom, bottom + height), representing the edge of(left, right, bottom, top). I make a bar ch ...继续阅读 (43)

To communicate results, the importance of data visualization can’t be overemphasized. In this article, I plot several figures to show the colors, markers and line styles in Matplotlib.1. ColorsMatplotlib.colorssupports several formats to specify the colors, including:A single letter for basic built-in colors, likerrepresenting'red'Legal html names for colors, likered,burlywoodandchartreuseGray shades, a string encoding a float in the0-1range, such as'0.75'Html hex string, like'#eeefff'A tuple(R, G, B)where each of R , G , B are in the range[0,1], e.g.,(0.75, 0, 0.75)1.1 Basic built-in co ...继续阅读 (40)

I have switched fromGnuplottoMatplotlibfor a while. For future reference, I decide to organize nodes from my experience of using Matplotlib.matplotlib.pyplotis a collection of command style functions that make matplotlib work like MATLAB. This article presents basic steps for plotting a figure.1. Figure and axespyplothas the concept of the current figure and the current axes. All plotting commands apply to the current axes.plt.gcf()returns the current figure andplt.gca()gets (or create one) the current Axes instance on the current figure.#!/usr/bin/env python # -*- coding: utf-8 -*- import ma ...继续阅读 (37)

From my experience, it is quite slow to usescpto transfer data between my laptop and EC2. In this article, I’ll show you how to upload and download files to/from Amazon EC2 with Dropbox, which is much faster.1. Transfer data with scp1.1 Upload files to EC2scp -i wp_sparkandshine.pem sparkandshine.net.tar.gz ubuntu@xx.xx.xx.xx:/var/www/.1.2 Download files from EC2Usescp(secure copy) to download data from EC2.# Step 1: Compress data tar czf sparkandshine.net.tar.gz sparkandshine.net/ # OR tar czf $(date +%Y%m%d-%H%M%S).tar.gz sparkandshine.net/ # filename with the current date and time, ...继续阅读 (64)

I write a shell script to simplify the operation of indenting LaTeX documents with the Perl packagelatexindent. The source code is hosted at GitHub,here.1. How to useDownload the shell scriptlatexindent.shand the perl packagelatexindexfromhere. Then use the following command to indent your LaTeX document:./latexindent.sh path/filename.texWhat the shell script does is to:generate the indented tex documents which is still namedfilename.texbackup the original tex filefilename.texasfilename.tex.oldThe source code oflatexindent.shis below:#!/usr/bin/env bash if [ -z $1 ]; then echo "Usage: $0 ...继续阅读 (59)

It is believed that the minimum connected dominating set problem cannot be solved in polynomial time. To the best of my knowledge, there is no source code available for approximation algorithms. Therefore, I decide to implement one proposed by M. Rai in 2009.1. MCDS-NON-DISTRIBUTED1.1 DescriptionsThe algorithm I implemented is proposed by M. Rai in 2009.RAI, M., GARG, N., VERMA, S., et al. A new heuristic approach for minimum connected dominating set in adhoc wireless networks. In : Advance Computing Conference, 2009. IACC 2009. IEEE International. IEEE, 2009. p. 284-289.The main idea of MCDS- ...继续阅读 (51)

经常给小侄、外甥们买书，做个记录，防止买重，也方便日后重复购买。同时，也期待您推荐其他好书。1. 科普百科美国国家地理少儿版百科《美国国家地理少儿版百科》是美国国家地理学会的旗舰出版物，内容覆盖了美国国家地理学会在陆地生物、水下生物、世界文化、先进科学、神秘太空、历史考古等各个方面的探索和发现。《国家地理》是一部内容全面丰富、版面活泼有趣的图书。从中你能发掘出比普通百科更多、更令人惊叹的知识宝藏，还能学到实用、高效的学习方法。亲亲科学图书馆(第2辑)(套装共10册)《亲亲科学图书馆(第2辑)(套装共10册)》是一套来自法国的包含了生活当中方方面的百科全书，小蜜蜂、汽车、大草原上的动物、小宝宝等10个方面，是一套针对3-6岁孩子认知启蒙的优质科普图画书。《亲亲科学图书馆》相较于较国内其他同系列书来说门类更加齐全，并且场景贴近生活，文图比例得当，在有限的字数中将科学道理解释清楚，《亲亲科学图书馆》将图画欣赏与学习认知的功能融为一体，让孩子接受起来更加容易。海豚科学馆·法国趣味图解小百科(套装共16册)编辑推荐《法国趣味图解小百科(套装共16册)》丰富、科学、全面的知识体系：涵盖宇宙、自然、动物、人文、社会等五大孩子最感兴趣的科学领域。“有趣、好玩”是孩子亲近科学最有效的方式：有趣的知识、每册多达400多幅生动手绘、大开页的精美图片，为孩子打开科学启蒙之门。科学研习宜手脑并用：手工探索栏 ...继续阅读 (42)

For better structuring a Python project, I decide to learn of packages, modules and classes. This article also shows how to import all modules and classes in a directory.1. Packages, modules and classesApackageincludes a collection ofmodules(a module is simply a Python source file*.py) that can exposeclasses, functions and global variables.1.1 PackagesTo create a package, put__init__.py(can just be an empty file) into a subdirectory (saylib/) to make Python treatlibas a package. For instance, a collection of frequently used modules are grouped into a packagelib, as listed below in a hierarchi ...继续阅读 (24)

I am analyzing a trace in GTFS, a collection of CSV files. Each record of a csv file is consisting of one or more fields speparated by commas,. It is error-prone to read csv files by simply using[line.split(',') for line in f.readlines()]for fields might contain commas. Therefore, I decide to switch to the Python modulecsv.1. CSV formatCSV (Comma-separated values)files store tabular data (numbers and text) in plain text. Each line of the file is a data record. Each record consists of one or more fields, separated by commas[1]. CSV format is the most common import and export format forspreadshe ...继续阅读 (33)

I sometimes encounter problems likeTypeError: unhashable type: 'list'while programming. Therefore, I decide to set aside some time to undertand the important Python concepts,mutable,hashableanditerable.1. mutable and immutablePython represents all its data as objects. Objects are identified by anuniqueandconstantinteger during its lifetime. Using the build-in functionid(object)returns the identity for a given object.Python objects can be categorized into two types:mutableandimmutable. For mutable objects, its content can be altered without changing their identity. One trick to check if a type ...继续阅读 (40)

My main development platform is Ubuntu. The cross-compilation feature is removed fromPyInstallersince1.5. In this article, I’ll show you how to package a Windows executable from Python scripts usingPyInstallerunderwine.1. Build a Windows excutable on UbuntuStep 1: Install wine and Pythonsudo apt-get install wine winetricks winetricks python # Python installation directory $ cd ~/.wine/drive_c/Python26Note thatpython26is installed, not includingpip(is used to installpyinstaller). Fortunately, newer Python versions already includepip. Choose the proper version fromDownload Python(for me ...继续阅读 (251)

I would like to do statistical analysis on an Excel file. Rather than learn a new programming languageVBA (Visual Basic for Applications), I would rather work with Excel files in Python. This post shows how to read and write Excel files with Python.1. OpenPyXLThe Python libraryopenpyxlis designed for reading and writing Excelxlsx/xlsm/xltx/xltmfiles. Refer toopenpyxl documentationfor its usage.Use the following command to installopenpyxl:$ sudo pip install openpyxlBTW,xlrdandxlwtare for reading and writing spreadsheet files compatible with older Microsoft Excel files (i.e.,.xls) respectively.2 ...继续阅读 (147)