<?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>1390-0129</journal-id>
<journal-title><![CDATA[Revista Politécnica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Politéc. (Quito)]]></abbrev-journal-title>
<issn>1390-0129</issn>
<publisher>
<publisher-name><![CDATA[Escuela Politécnica Nacional]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1390-01292025000400057</article-id>
<article-id pub-id-type="doi">10.33333/rp.vol56n2.06</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tecnología Funcional de Nariz Electrónica para el Monitoreo de Gases en el Aire]]></article-title>
<article-title xml:lang="en"><![CDATA[Functional Electronic Nose Technology for Monitoring Air Gases]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ricardo]]></surname>
<given-names><![CDATA[Macías-Quijas,]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garzón-Castro]]></surname>
<given-names><![CDATA[Claudia L]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Filomena-Ambrosio]]></surname>
<given-names><![CDATA[Annamaría]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Del-Valle-Soto]]></surname>
<given-names><![CDATA[Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de Fazio]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Visconti]]></surname>
<given-names><![CDATA[Paolo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez]]></surname>
<given-names><![CDATA[Ramiro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Panamericana Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de La Sabana Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Chía ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de La Sabana Escuela Internacional de Ciencias Económicas y Administrativas ]]></institution>
<addr-line><![CDATA[Chía ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Panamericana Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,University of Salento Department of Innovation Engineering ]]></institution>
<addr-line><![CDATA[Lecce ]]></addr-line>
<country>Italy</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>01</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>01</month>
<year>2025</year>
</pub-date>
<volume>56</volume>
<numero>2</numero>
<fpage>57</fpage>
<lpage>66</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_arttext&amp;pid=S1390-01292025000400057&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_abstract&amp;pid=S1390-01292025000400057&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_pdf&amp;pid=S1390-01292025000400057&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En los últimos años, las narices electrónicas se han consolidado como herramientas innovadoras para el monitoreo ambiental, particularmente en la detección de contaminantes en el aire. En este trabajo, se presenta el diseño e implementación de una tecnología funcional, portátil y de bajo costo de nariz electrónica, capaz de identificar gases como el monóxido de carbono, el metano y varios compuestos volátiles. Esta tecnología integra un arreglo de sensores y un módulo de adquisición de datos junto con algoritmos avanzados de procesamiento de señales. Se propone la aplicación del Método de Filtrado y Diagonalización (FDM) para la extracción de características espectrales, combinado con Bosques Aleatorios (RF) para la clasificación de gases. Los resultados experimentales demuestran una precisión del 96.4 % en la identificación de compuestos gaseosos, validando la efectividad de la combinación FDM-RF. Este estudio contribuye al avance de tecnologías accesibles para el monitoreo de la calidad del aire y así como de nuevos métodos de detección y clasificación de gases ambientales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In recent years, electronic noses (e-noses) have emerged as innovative tools for environmental monitoring, particularly in detecting air pollutants. This study presents the design and development of a functional, portable, and low-cost e-nose technology capable of identifying gases such as carbon monoxide, methane, and several volatile compounds. Such technology integrates a multi-sensor array and a data acquisition module, along with advanced signal processing algorithms. The Filter Diagonalization Method (FDM) is proposed for spectral feature extraction, combined with Random Forest (RF) for gas classification. Experimental results demonstrate a 96.4 % accuracy in gas identification, validating the effectiveness of the FDM-RF combination. This study contributes to the advancement of accessible air quality monitoring technologies and new gas detection and classification approaches.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Nariz electrónica]]></kwd>
<kwd lng="es"><![CDATA[detección y clasificación]]></kwd>
<kwd lng="es"><![CDATA[método de filtrado y diagonalización]]></kwd>
<kwd lng="es"><![CDATA[bosques aleatorios]]></kwd>
<kwd lng="en"><![CDATA[Electronic nose]]></kwd>
<kwd lng="en"><![CDATA[detection and classification]]></kwd>
<kwd lng="en"><![CDATA[filter diagonalization method]]></kwd>
<kwd lng="en"><![CDATA[random forest]]></kwd>
</kwd-group>
</article-meta>
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