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<html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><!--Converted with jLaTeX2HTML 2002 (1.62) JA patch-1.4patched version by: Kenshi Muto, Debian Project.LaTeX2HTML 2002 (1.62),original version by: Nikos Drakos, CBLU, University of Leeds* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan* with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --><HTML><HEAD><TITLE>22.1.1.1 Example</TITLE><META NAME="description" CONTENT="22.1.1.1 Example"><META NAME="keywords" CONTENT="everything"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Generator" CONTENT="jLaTeX2HTML v2002 JA patch-1.4"><META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"><LINK REL="STYLESHEET" HREF="everything.css" tppabs="http://www.isi.edu/nsnam/ns/doc/everything.css"><LINK REL="next" HREF="node251.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node251.html"><LINK REL="previous" HREF="node249.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node249.html"><LINK REL="up" HREF="node249.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node249.html"><LINK REL="next" HREF="node251.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node251.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html5156" HREF="node251.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node251.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html5150" HREF="node249.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node249.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html5144" HREF="node249.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node249.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html5152" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html"><IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="file:/usr/share/latex2html/icons/contents.png"></A> <A NAME="tex2html5154" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="file:/usr/share/latex2html/icons/index.png"></A> <BR><B> Next:</B> <A NAME="tex2html5157" HREF="node251.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node251.html">22.1.1.2 Output</A><B> Up:</B> <A NAME="tex2html5151" HREF="node249.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node249.html">22.1.1 Seeding The RNG</A><B> Previous:</B> <A NAME="tex2html5145" HREF="node249.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node249.html">22.1.1 Seeding The RNG</A>   <B> <A NAME="tex2html5153" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html5155" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H3><A NAME="SECTION04211100000000000000">22.1.1.1 Example</A></H3><PRE> # Usage: ns rng-test.tcl [replication number] if {$argc > 1} { puts "Usage: ns rng-test.tcl \[replication number\]" exit } set run 1 if {$argc == 1} { set run [lindex $argv 0] } if {$run < 1} { set run 1 } # seed the default RNG global defaultRNG $defaultRNG seed 9999 # create the RNGs and set them to the correct substream set arrivalRNG [new RNG] set sizeRNG [new RNG] for {set j 1} {$j < $run} {incr j} { $arrivalRNG next-substream $sizeRNG next-substream } # arrival_ is a exponential random variable describing the time # between consecutive packet arrivals set arrival_ [new RandomVariable/Exponential] $arrival_ set avg_ 5 $arrival_ use-rng $arrivalRNG # size_ is a uniform random variable describing packet sizes set size_ [new RandomVariable/Uniform] $size_ set min_ 100 $size_ set max_ 5000 $size_ use-rng $sizeRNG # print the first 5 arrival times and sizes for {set j 0} {$j < 5} {incr j} { puts [format "%-8.3f %-4d" [$arrival_ value] \ [expr round([$size_ value])]] }</PRE><P><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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