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<HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1252"><META NAME="Generator" CONTENT="Microsoft FrontPage 4.0"><TITLE>SVM-Multiclass: Multi-Class Support Vector Machine</TITLE><META NAME="Version" CONTENT="8.0.3514"><META NAME="Date" CONTENT="11/26/96"><META NAME="Template" CONTENT="C:\Programme\Microsoft Office\Office\HTML.DOT"></HEAD><BODY vLink=#800080 link=#0000ff bgColor=#ffffff><TABLE cellSpacing=0 cellPadding=5 border=0> <TBODY> <TR> <TD vAlign=top width="14%"> <H2><IMG height=80 src="culogo_125.gif" tppabs="http://www.cs.cornell.edu/People/tj/images/culogo_125.gif" width=80></H2></TD> <TD vAlign=top width="75%"> <H1 align=center>SVM<I><SUP>cfg</SUP> </H1></I> <H1 align=center>Support Vector Machine for Weighted Context Free Grammars</H1><FONT color=#000000> <P align=center>Author: </FONT><A href="javascript:if(confirm('http://www.joachims.org/ \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.joachims.org/'" tppabs="http://www.joachims.org/" target=_top>Thorsten Joachims</A><FONT color=#000000> <</FONT><A href="mailto:thorsten@joachims.org">thorsten@joachims.org</A><FONT color=#000000>> <BR></FONT><A href="javascript:if(confirm('http://www.cornell.edu/ \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.cornell.edu/'" tppabs="http://www.cornell.edu/" target=_top>Cornell University</A><FONT color=#000000> <BR></FONT><A href="javascript:if(confirm('http://www.cs.cornell.edu/ \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.cs.cornell.edu/'" tppabs="http://www.cs.cornell.edu/" target=_top>Department of Computer Science</A><FONT color=#000000> </P> <P align=center>Version: 2.01 <BR>Date: 03.09.2004</FONT></P></TD> <TD vAlign=top width="11%"> <H2><IMG height=80 src="culogo_125.gif" tppabs="http://www.cs.cornell.edu/People/tj/images/culogo_125.gif" width=80></H2></TD> </TR></TBODY></TABLE><H2>Overview</H2><P><I>SVM<SUP>cfg</SUP></I> is an implementation of the Support Vector Machine (SVM) algorithm for learning a weighted context free grammar as described in [1]. The goal is to learn an accurate model from supervised training data, so that this model predicts the correct tree <tt>y</tt> for a given input <tt>x</tt> (as, e.g., in natural language parsing). It includes a modified version of the <a href="javascript:if(confirm('http://www.cog.brown.edu/~mj/Software.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.cog.brown.edu/~mj/Software.htm'" tppabs="http://www.cog.brown.edu/~mj/Software.htm">CKY parser written by Mark Johnson</a>, which is described in [2]. </p><p>Compared to a conventional probablistic context free grammar (PCFG), the SVM algorithm can handle overlapping and dependent attributes attached to grammar rules. In particular, the weight of an instantiated rule can depend on the complete terminal sequence, the span of the rule, and the spans of the children trees. This implementation is not meant to be a specialized and properly tuned parser for natural language, but a flexible and extensible tool for learning models in a wide range of domains. In particular, it is easy to add attributes that reflect the properties for the particular domain at hand.</p><P>This implementation is an instance of <I>SVM<SUP>struct</SUP></I>. More information on <I>SVM<SUP>struct</SUP></I> is available <a href="svm_struct.html" tppabs="http://www.cs.cornell.edu/People/tj/svm%5Flight/svm_struct.html">here</a>.<H2>Source Code</H2>The program is free for scientific use. Please contact me, if you are planning to use the software for commercial purposes. The software must not be further distributed without prior permission of the author. The implementation was developed on Solaris 2.7 with gcc, but compiles also on Linux, IRIX, Cygwin, and Powermac (after small modifications, see </FONT><A href="svm_light_faq.html" tppabs="http://www.cs.cornell.edu/People/tj/svm%5Flight/svm_light_faq.html">FAQ</A>). The source code is available at the following location: </P><P><PRE> <a href="javascript:if(confirm('http://download.joachims.org/svm_cfg/current/svm_cfg.tar.gz \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://download.joachims.org/svm_cfg/current/svm_cfg.tar.gz'" tppabs="http://download.joachims.org/svm_cfg/current/svm_cfg.tar.gz">http://download.joachims.org/svm_cfg/current/svm_cfg.tar.gz</a></PRE></P><P><A href="mailto:svm-light@ls8.cs.uni-dortmund.de">Please send me email</A><FONT COLOR="#000000"> and let me know that you got it. The archive contains the source code of the most recent version of <I>SVM<SUP>cfg</SUP></I>, which includes the source code of <a href="svm_struct.html" tppabs="http://www.cs.cornell.edu/People/tj/svm%5Flight/svm_struct.html"><I>SVM<SUP>struct</SUP></I></a>, the <a href="javascript:if(confirm('http://www.cog.brown.edu/~mj/Software.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.cog.brown.edu/~mj/Software.htm'" tppabs="http://www.cog.brown.edu/~mj/Software.htm">CKY parser<a> of <a href="javascript:if(confirm('http://www.cog.brown.edu/~mj \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.cog.brown.edu/~mj'" tppabs="http://www.cog.brown.edu/~mj">Mark Johnson</a>, and the <a href="index.html" tppabs="http://www.cs.cornell.edu/People/tj/svm%5Flight/index.html"><I>SVM<SUP>light</SUP></I> quadratic optimizer</a>. Unpack the archive using the shell command:<P><PRE> gunzip 朿 svm_cfg.tar.gz | tar xvf ?? 快捷鍵說明
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