<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:wfw="http://wellformedweb.org/CommentAPI/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
	xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
	>

<channel>
	<title>Nine Rivers</title>
	<atom:link href="http://9rivers.linkka.com/feed/" rel="self" type="application/rss+xml" />
	<link>http://9rivers.linkka.com</link>
	<description>Molecular modeling in Materials Sciences Web development Programming IT</description>
	<lastBuildDate>Fri, 02 Dec 2011 06:20:53 +0000</lastBuildDate>
	<language>en</language>
	<sy:updatePeriod>hourly</sy:updatePeriod>
	<sy:updateFrequency>1</sy:updateFrequency>
	<generator>http://wordpress.org/?v=3.2.1</generator>
		<item>
		<title>Remember the path of last login</title>
		<link>http://9rivers.linkka.com/2011/12/02/remember-the-path-last-login/</link>
		<comments>http://9rivers.linkka.com/2011/12/02/remember-the-path-last-login/#comments</comments>
		<pubDate>Fri, 02 Dec 2011 06:16:59 +0000</pubDate>
		<dc:creator>9rivers</dc:creator>
				<category><![CDATA[Articles in English]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[bash]]></category>

		<guid isPermaLink="false">http://9rivers.linkka.com/?p=670</guid>
		<description><![CDATA[create ~/.bash_logout with the following contents: 12t=`readlink -f \`pwd\`` ln -sfn $t ~/lastdir Each time when you log off, the current dir is remembered and a symlink is created in ~/ . It&#8217;s convenient for the next time:) NOTE: 1. &#8220;readlink -f&#8221; to ensure you ALWAYS get the really full path (or you will have [...]]]></description>
		<wfw:commentRss>http://9rivers.linkka.com/2011/12/02/remember-the-path-last-login/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>FENE势函数的函数图像和不同版本</title>
		<link>http://9rivers.linkka.com/2011/11/18/fene%e5%8a%bf%e5%87%bd%e6%95%b0%e7%9a%84%e5%87%bd%e6%95%b0%e5%9b%be%e5%83%8f%e5%92%8c%e4%b8%8d%e5%90%8c%e7%89%88%e6%9c%ac/</link>
		<comments>http://9rivers.linkka.com/2011/11/18/fene%e5%8a%bf%e5%87%bd%e6%95%b0%e7%9a%84%e5%87%bd%e6%95%b0%e5%9b%be%e5%83%8f%e5%92%8c%e4%b8%8d%e5%90%8c%e7%89%88%e6%9c%ac/#comments</comments>
		<pubDate>Fri, 18 Nov 2011 13:22:48 +0000</pubDate>
		<dc:creator>9rivers</dc:creator>
				<category><![CDATA[中文文章]]></category>
		<category><![CDATA[分子模拟]]></category>
		<category><![CDATA[forcefield]]></category>
		<category><![CDATA[modeling]]></category>

		<guid isPermaLink="false">http://9rivers.linkka.com/?p=650</guid>
		<description><![CDATA[FENE（finitely extensible nonlinear elastic）势函数可以用来描述分子成键相互作用。它的主要特点是最大键长只能有限值，这是和harmonic成键函数的主要不同之处。文献中有两个常用的版本： 1. Kremer版： 特点是用一个WCA势函数作为“硬核”。不方便的地方是，势能的极小值与硬核势的参数有关，不是十分直观。同时这个势函数关于势能极小值是非对称的。 2. Binder版：无需而外硬核势防止原子重叠，势函数本身关于极小值对称，且可以直接指定势能极小值的位置。 FENE势函数的另一个特征是存在上下两个发散的边界位置，在边界处势能值为正无穷大。（Kremer版下边界在r=0位置，由WCA势函数参数控制。Binder版的下边界与rmax关于rmin对称，因此有可能在r&#60;0的位置） 具体的函数图象见下或参见我在SimuWorld上的帖子。 注：Kremer和Binder版FENE势函数在LAMMPS中分别由bond_style fene和bond_style fene/expand实现。]]></description>
		<wfw:commentRss>http://9rivers.linkka.com/2011/11/18/fene%e5%8a%bf%e5%87%bd%e6%95%b0%e7%9a%84%e5%87%bd%e6%95%b0%e5%9b%be%e5%83%8f%e5%92%8c%e4%b8%8d%e5%90%8c%e7%89%88%e6%9c%ac/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Ubuntu wubi.exe installation</title>
		<link>http://9rivers.linkka.com/2011/11/16/ubuntu-wubi-exe-installation/</link>
		<comments>http://9rivers.linkka.com/2011/11/16/ubuntu-wubi-exe-installation/#comments</comments>
		<pubDate>Wed, 16 Nov 2011 18:26:17 +0000</pubDate>
		<dc:creator>9rivers</dc:creator>
				<category><![CDATA[Articles in English]]></category>
		<category><![CDATA[Software]]></category>
		<category><![CDATA[linux]]></category>

		<guid isPermaLink="false">http://9rivers.linkka.com/?p=646</guid>
		<description><![CDATA[The Ubuntu CD contents look like these: There is an executable named &#8220;wubi.exe&#8221;, which allows you installing Ubuntu alongside with an existing Windows system (dual-boot). However, many people experienced &#8220;no response&#8221;  problem after double clicking the wubi.exe. Some say this is because some of your drives contains non-English labels. However, this is not always the [...]]]></description>
		<wfw:commentRss>http://9rivers.linkka.com/2011/11/16/ubuntu-wubi-exe-installation/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Chinese character display with VPtyhon</title>
		<link>http://9rivers.linkka.com/2011/11/15/chinese-character-display-with-vptyhon/</link>
		<comments>http://9rivers.linkka.com/2011/11/15/chinese-character-display-with-vptyhon/#comments</comments>
		<pubDate>Tue, 15 Nov 2011 08:38:12 +0000</pubDate>
		<dc:creator>9rivers</dc:creator>
				<category><![CDATA[编程]]></category>
		<category><![CDATA[软件应用]]></category>
		<category><![CDATA[3D]]></category>
		<category><![CDATA[Python]]></category>

		<guid isPermaLink="false">http://9rivers.linkka.com/?p=640</guid>
		<description><![CDATA[VPython到底能不能显示中文字符？能显示哪些中文字体？下面的code给出答案。 123456789101112131415from visual import * label&#40;pos=&#40;0,0,0&#41;, text=u'测试'&#41; #print shapes.findSystemFonts() #pl = shapes.text(text=u'测试') #凡是ttf字体文件用windows字体查看器查看typeface name不乱码的（显示中文）字体都可以使用 text&#40;text=u'中文', align='center', depth=-0.3, color=color.green, font=u'C:\\WINDOWS\\Fonts\\simkai.ttf'&#41; text&#40;text=u'字体', align='center', depth=-0.3, color=color.yellow, font=u'C:\\WINDOWS\\Fonts\\msyh.ttf',pos=&#40;0,-1,0&#41;,height=0.5&#41; text&#40;text=u'字体', align='left', depth=-0.3, color=color.red, font=u'C:\\WINDOWS\\Fonts\\jianhuangcao.ttf',pos=&#40;0,-1,0&#41;&#41; 可见VPython不仅支持中文3D字体生成，而且也支持不同字体。但是我发现并不是所有中文字体都能使用，至少在我的英文版WinXP上是这样。一个技巧是，在windows中双击字体ttf文件用字体查看器查看字体，如果显示的typeface name是正确的中文字符，那么这个字体可以使用，如果是乱码则不能。 最近VPython又加入了extrusion的功能，因此生成的中文字形也可以经过挤出形成其它复杂造型，会有很多不同用途。]]></description>
		<wfw:commentRss>http://9rivers.linkka.com/2011/11/15/chinese-character-display-with-vptyhon/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Install Python modules as non-root user on HPC cluster</title>
		<link>http://9rivers.linkka.com/2011/11/10/install-python-modules-as-non-root-user-on-hpc-cluster/</link>
		<comments>http://9rivers.linkka.com/2011/11/10/install-python-modules-as-non-root-user-on-hpc-cluster/#comments</comments>
		<pubDate>Thu, 10 Nov 2011 01:41:33 +0000</pubDate>
		<dc:creator>9rivers</dc:creator>
				<category><![CDATA[Modeling & Simulation]]></category>
		<category><![CDATA[Notes]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[Software]]></category>
		<category><![CDATA[mdanalysis]]></category>
		<category><![CDATA[Python]]></category>

		<guid isPermaLink="false">http://9rivers.linkka.com/?p=632</guid>
		<description><![CDATA[The key steps 1. Create a folder named &#8220;~/python-packages&#8221;, then create a path &#8220;~/python-packages/lib/python2.6/site-packages/&#8221; with 1mkdir -p python-packages/lib/python2.6/site-packages/ The above path containing the version number of Python should be adjust accordingly base on the actual Python version you are using. This step sets up a directory structure that is needed by python modules. 2. Next, [...]]]></description>
		<wfw:commentRss>http://9rivers.linkka.com/2011/11/10/install-python-modules-as-non-root-user-on-hpc-cluster/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Multiple windows with gnuplot</title>
		<link>http://9rivers.linkka.com/2011/11/08/multiple-windows-with-gnuplot/</link>
		<comments>http://9rivers.linkka.com/2011/11/08/multiple-windows-with-gnuplot/#comments</comments>
		<pubDate>Tue, 08 Nov 2011 11:19:57 +0000</pubDate>
		<dc:creator>9rivers</dc:creator>
				<category><![CDATA[Articles in English]]></category>
		<category><![CDATA[Modeling & Simulation]]></category>
		<category><![CDATA[Software]]></category>
		<category><![CDATA[gnuplot]]></category>

		<guid isPermaLink="false">http://9rivers.linkka.com/?p=617</guid>
		<description><![CDATA[To create more than one window in a gnuplot script could be necessary if you have many data series to plot. The following code snippet shows how: 12345678set term wxt 0 set grid xtics ytics plot 'prop_stat.txt' u 1:2 ti &#34;rg&#34; w l, \ 'prop_stat.txt' u 1:3 ti &#34;rg^2&#34; w l, \ 'prop_stat.txt' u 1:4 [...]]]></description>
		<wfw:commentRss>http://9rivers.linkka.com/2011/11/08/multiple-windows-with-gnuplot/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>density profile的计算</title>
		<link>http://9rivers.linkka.com/2011/10/28/density-profile%e7%9a%84%e8%ae%a1%e7%ae%97/</link>
		<comments>http://9rivers.linkka.com/2011/10/28/density-profile%e7%9a%84%e8%ae%a1%e7%ae%97/#comments</comments>
		<pubDate>Fri, 28 Oct 2011 12:25:53 +0000</pubDate>
		<dc:creator>9rivers</dc:creator>
				<category><![CDATA[分子模拟]]></category>
		<category><![CDATA[工作相关]]></category>

		<guid isPermaLink="false">http://9rivers.linkka.com/?p=615</guid>
		<description><![CDATA[1. Gromacs有一个工具g_density可以分析各个方向上原子的数密度和电子密度。 2. VMD有一个第三方插件VMD Density Profile Tool,可以根据原子类型分析密度分布。 3. LAMMPS的Pizza工具包有一个脚本density.py也可完成类似工作。 可根据需要选取。]]></description>
		<wfw:commentRss>http://9rivers.linkka.com/2011/10/28/density-profile%e7%9a%84%e8%ae%a1%e7%ae%97/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Gmail用户名中的“.”是可以省略的</title>
		<link>http://9rivers.linkka.com/2011/10/28/gmail%e7%94%a8%e6%88%b7%e5%90%8d%e4%b8%ad%e7%9a%84%e2%80%9c-%e2%80%9d%e6%98%af%e5%8f%af%e4%bb%a5%e7%9c%81%e7%95%a5%e7%9a%84/</link>
		<comments>http://9rivers.linkka.com/2011/10/28/gmail%e7%94%a8%e6%88%b7%e5%90%8d%e4%b8%ad%e7%9a%84%e2%80%9c-%e2%80%9d%e6%98%af%e5%8f%af%e4%bb%a5%e7%9c%81%e7%95%a5%e7%9a%84/#comments</comments>
		<pubDate>Fri, 28 Oct 2011 09:54:27 +0000</pubDate>
		<dc:creator>9rivers</dc:creator>
				<category><![CDATA[互联网应用]]></category>

		<guid isPermaLink="false">http://9rivers.linkka.com/?p=613</guid>
		<description><![CDATA[后知后觉的我有了一个新发现，Gmail用户名中的小数点可以省略，也可以随意添加。参见：这里 如果您想在用户名中使用更少或更多的点 (.)，则不必进行任何更改。如果您的用户名为“my.address@gmail.com”，则发送到“myaddress@gmail.com”和 “m.y.a.d.d.r.e.s.s@gmail.com”的邮件都会发送到您的收件箱。了解关于点的更多信息。]]></description>
		<wfw:commentRss>http://9rivers.linkka.com/2011/10/28/gmail%e7%94%a8%e6%88%b7%e5%90%8d%e4%b8%ad%e7%9a%84%e2%80%9c-%e2%80%9d%e6%98%af%e5%8f%af%e4%bb%a5%e7%9c%81%e7%95%a5%e7%9a%84/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Excluding syntax for folder synchronization in Unreal Commander</title>
		<link>http://9rivers.linkka.com/2011/10/11/excluding-syntax-for-folder-synchronization-in-unreal-commander/</link>
		<comments>http://9rivers.linkka.com/2011/10/11/excluding-syntax-for-folder-synchronization-in-unreal-commander/#comments</comments>
		<pubDate>Tue, 11 Oct 2011 16:52:05 +0000</pubDate>
		<dc:creator>9rivers</dc:creator>
				<category><![CDATA[Software]]></category>
		<category><![CDATA[软件应用]]></category>
		<category><![CDATA[unreal commander]]></category>

		<guid isPermaLink="false">http://9rivers.linkka.com/?p=606</guid>
		<description><![CDATA[Unreal Commander is one of the best file manager software which is free of charge. When you want to synchronize two directories with considering only the specified file types, you will need to define filter string. &#8220;*.*&#8221; means to compare all files; &#8220;*.txt&#8221; means to compare also the text file. However, how can you compare [...]]]></description>
		<wfw:commentRss>http://9rivers.linkka.com/2011/10/11/excluding-syntax-for-folder-synchronization-in-unreal-commander/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Selection of GUI toolkits</title>
		<link>http://9rivers.linkka.com/2011/09/28/selection-of-gui-toolkits/</link>
		<comments>http://9rivers.linkka.com/2011/09/28/selection-of-gui-toolkits/#comments</comments>
		<pubDate>Wed, 28 Sep 2011 10:16:14 +0000</pubDate>
		<dc:creator>9rivers</dc:creator>
				<category><![CDATA[Articles in English]]></category>
		<category><![CDATA[Programming]]></category>

		<guid isPermaLink="false">http://9rivers.linkka.com/?p=603</guid>
		<description><![CDATA[To select a toolkit for GUI programming is something like to select a bottle of wine. Only you know your favorites.  Here are mine. 1. For a program need various feature, like networking, fancy looking, I choose QT. It is cross-platform and can do almost anything for you, except for going to the cinema with [...]]]></description>
		<wfw:commentRss>http://9rivers.linkka.com/2011/09/28/selection-of-gui-toolkits/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
	</channel>
</rss>

