<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1405-5546</journal-id>
<journal-title><![CDATA[Computación y Sistemas]]></journal-title>
<abbrev-journal-title><![CDATA[Comp. y Sist.]]></abbrev-journal-title>
<issn>1405-5546</issn>
<publisher>
<publisher-name><![CDATA[Instituto Politécnico Nacional, Centro de Investigación en Computación]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-55462010000100003</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Evolutionary Algorithm for the Vehicles Routing Problem with Time Windows Based on a Constraint Satisfaction Technique]]></article-title>
<article-title xml:lang="es"><![CDATA[Algoritmo Evolutivo para el Problema de Ruteo de Vehículos con Ventanas de Tiempo Basado en una Técnica de Satisfacción de Restricciones]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz Chávez]]></surname>
<given-names><![CDATA[Marco Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz Parra]]></surname>
<given-names><![CDATA[Ocotlán]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Autonomous University of Morelos Center for Research of Engineering and Applied Sciences ]]></institution>
<addr-line><![CDATA[Cuernavaca Morelos]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2010</year>
</pub-date>
<volume>13</volume>
<numero>3</numero>
<fpage>257</fpage>
<lpage>272</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-55462010000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-55462010000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-55462010000100003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[In this paper a Memetic Algorithm (MA) is proposed for solving the Vehicles Routing Problem with Time Windows (VRPTW) multi-objective, using a constraint satisfaction heuristic that allows pruning of the search space to direct a search towards good solutions that represent the individuals of the population. An evolutionary heuristic is applied in order to establish the crossover and mutation between sub-routes. The results of MA demonstrate that the use of Constraints Satisfaction Technique permits MA to work more efficiently in the VRPTW.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[En este documento se propone un Algoritmo Memetico (MA) para resolver el problema de ruteo vehicular con ventanas de tiempo (VRPTW) multi-objetivo, usando una heurística de satisfacción de restricciones que permite podar el espacio de búsqueda para dirigir la búsqueda hacia buenas soluciones las cuales son representadas por los individuos de la población. Se aplica una heurística evolutiva para establecer el cruzamiento y mutación entre sub-rutas. El resultado del MA demuestra que el uso de la Técnica de Satisfacción de Restricciones permite al MA trabajar más eficientemente en el VRPTW.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Memetic algorithm (GA-PCP)]]></kwd>
<kwd lng="en"><![CDATA[Constraints Satisfaction Problem]]></kwd>
<kwd lng="en"><![CDATA[Precedence Constraint Posting]]></kwd>
<kwd lng="en"><![CDATA[local search]]></kwd>
<kwd lng="en"><![CDATA[VRPTW]]></kwd>
<kwd lng="es"><![CDATA[Algoritmo Memetico (GA-PCP)]]></kwd>
<kwd lng="es"><![CDATA[Problema de Satisfacción de Restricciones]]></kwd>
<kwd lng="es"><![CDATA[Estableciendo Restricciones de Precedencia]]></kwd>
<kwd lng="es"><![CDATA[Búsqueda Local]]></kwd>
<kwd lng="es"><![CDATA[VRPTW]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Art&iacute;culos</font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Evolutionary Algorithm for the Vehicles Routing Problem with Time Windows Based on a Constraint Satisfaction Technique<sup><a href="#notas">1</a></sup></b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="3"><b><i>Algoritmo Evolutivo para el Problema de Ruteo de Veh&iacute;culos con Ventanas de Tiempo Basado en una T&eacute;cnica de Satisfacci&oacute;n de Restricciones</i></b><sup><a href="#notas">1</a></sup></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>Marco Antonio Cruz Ch&aacute;vez<sup>*</sup> and Ocotl&aacute;n D&iacute;az Parra<sup>**</sup></b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>CIICAp, Autonomous University of Morelos State Av. Universidad 1001. Col. Chamilpa, C.P. 6221O.Cuernavaca, Morelos, M&eacute;xico. </i><sup>*</sup><a href="mailto:mcruz@uaem.mx">mcruz@uaem.mx</a>, <sup>**</sup><a href="mailto:odiazp@uaem.mx">odiazp@uaem.mx</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Article received on April 22, 2008    <br>   Accepted on November 10, 2008</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">In this paper a Memetic Algorithm (MA) is proposed for solving the Vehicles Routing Problem with Time Windows (VRPTW) multi&#150;objective, using a constraint satisfaction heuristic that allows pruning of the search space to direct a search towards good solutions that represent the individuals of the population. An evolutionary heuristic is applied in order to establish the crossover and mutation between sub&#150;routes. The results of MA demonstrate that the use of Constraints Satisfaction Technique permits MA to work more efficiently in the VRPTW.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>Memetic algorithm (GA&#150;PCP), Constraints Satisfaction Problem, Precedence Constraint Posting, local search, VRPTW.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">En este documento se propone un Algoritmo Memetico (MA) para resolver el problema de ruteo vehicular con ventanas de tiempo (VRPTW) multi&#150;objetivo, usando una heur&iacute;stica de satisfacci&oacute;n de restricciones que permite podar el espacio de b&uacute;squeda para dirigir la b&uacute;squeda hacia buenas soluciones las cuales son representadas por los individuos de la poblaci&oacute;n. Se aplica una heur&iacute;stica evolutiva para establecer el cruzamiento y mutaci&oacute;n entre sub&#150;rutas. El resultado del MA demuestra que el uso de la T&eacute;cnica de Satisfacci&oacute;n de Restricciones permite al MA trabajar m&aacute;s eficientemente en el VRPTW.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Palabras clave: </b>Algoritmo Memetico (GA&#150;PCP), Problema de Satisfacci&oacute;n de Restricciones, Estableciendo Restricciones de Precedencia, B&uacute;squeda Local, VRPTW.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/cys/v13n3/v13n3a3.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>References</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1. <b>Adeli, H. &amp; Hung, S. 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<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b><a name="notas"></a>Notas</b></font></p>     <p align="justify"><font face="verdana" size="2"><sup>1 </sup>This work was supported by project 160 of the Fideicomiso SEP&#150;UNAM, 2006&#150;2007.</font></p>      ]]></body><back>
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