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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Herald of Technological University</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Herald of Technological University</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>ВЕСТНИК ТЕХНОЛОГИЧЕСКОГО УНИВЕРСИТЕТА</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">3034-4689</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">61781</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>СТРУКТУРА ВЕЩЕСТВА И ТЕОРИЯ ХИМИЧЕСКИХ ПРОЦЕССОВ</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject></subject>
    </subj-group>
    <subj-group>
     <subject>СТРУКТУРА ВЕЩЕСТВА И ТЕОРИЯ ХИМИЧЕСКИХ ПРОЦЕССОВ</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">ПРОЕКЦИОННЫЕ МЕТОДЫ РЕШЕНИЯ ЗАДАЧИ О СОБСТВЕННЫХ ВОЛНАХ ДИЭЛЕКТРИЧЕСКОГО ВОЛНОВОДА С КУСОЧНО-ПОСТОЯННЫМ ПОКАЗАТЕЛЕМ ПРЕЛОМЛЕНИЯ</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>ПРОЕКЦИОННЫЕ МЕТОДЫ РЕШЕНИЯ ЗАДАЧИ О СОБСТВЕННЫХ ВОЛНАХ ДИЭЛЕКТРИЧЕСКОГО ВОЛНОВОДА С КУСОЧНО-ПОСТОЯННЫМ ПОКАЗАТЕЛЕМ ПРЕЛОМЛЕНИЯ</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Карчевский</surname>
       <given-names>Е М</given-names>
      </name>
      <name xml:lang="en">
       <surname>Карчевский</surname>
       <given-names>Е М</given-names>
      </name>
     </name-alternatives>
     <email>ekarchev@yandex.ru</email>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Плещинская</surname>
       <given-names>И Е</given-names>
      </name>
      <name xml:lang="en">
       <surname>Плещинская</surname>
       <given-names>И Е</given-names>
      </name>
     </name-alternatives>
     <email>plant_flower@mail.ru</email>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Спиридонов</surname>
       <given-names>А О</given-names>
      </name>
      <name xml:lang="en">
       <surname>Спиридонов</surname>
       <given-names>А О</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">К(П)ФУ</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">К(П)ФУ</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">КНИТУ</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">КНИТУ</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">К(П)ФУ</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">К(П)ФУ</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2025-08-01T13:45:36+03:00">
    <day>01</day>
    <month>08</month>
    <year>2025</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2025-08-01T13:45:36+03:00">
    <day>01</day>
    <month>08</month>
    <year>2025</year>
   </pub-date>
   <volume>16</volume>
   <issue>20</issue>
   <fpage>7</fpage>
   <lpage>11</lpage>
   <history>
    <date date-type="received" iso-8601-date="2023-04-19T20:53:42+03:00">
     <day>19</day>
     <month>04</month>
     <year>2023</year>
    </date>
   </history>
   <self-uri xlink:href="https://vestniktu.ru/en/nauka/article/61781/view">https://vestniktu.ru/en/nauka/article/61781/view</self-uri>
   <abstract xml:lang="ru">
    <p>Задача о поверхностных и вытекающих собственных волнах слабонаправляющего диэлектрического волновода с кусочно-постоянным показателем преломления сведена к нелинейной спектральной задаче для системы слабо сингулярных граничных интегральных уравнений. Интегральный оператор аппроксимируется методом Галеркина и методом коллокации. Сходимость и свойства этих методов исследуются численно. Метод коллокации демонстрирует лучшую скорость сходимости.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>The original problem on surface and leaky eigen modes of a weakly guiding step-index optical waveguide is considered. The original problem is reduced to a nonlinear spectral problem for the set of weakly singular boundary integral equations. We approximate the integral operator by collocation method and by Galerkin method. The convergence and quality of these numerical methods are proved by numerical experiments. The collocation method demonstrates better speed of convergence. </p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>проекционные методы</kwd>
    <kwd>спектральные задачи</kwd>
    <kwd>диэлектрические волноводы</kwd>
    <kwd>projection methods</kwd>
    <kwd>spectral problems</kwd>
    <kwd>dielectric waveguides</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>проекционные методы</kwd>
    <kwd>спектральные задачи</kwd>
    <kwd>диэлектрические волноводы</kwd>
    <kwd>projection methods</kwd>
    <kwd>spectral problems</kwd>
    <kwd>dielectric waveguides</kwd>
   </kwd-group>
  </article-meta>
 </front>
 <body>
  <p></p>
 </body>
 <back>
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