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    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-15522</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/15522</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Статьи</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Articles</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">On the issue of determining compressor efficiency</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>К вопросу об определении полезного действия компрессора</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Lebedev</surname>
            <given-names>A. A.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Лебедев</surname>
              <given-names>А. А.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Lebedev</surname>
              <given-names>A. A.</given-names>
            </name>
          </name-alternatives>
          <email>pmi@spmi.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru"> (Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en"> (Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="1912-12-01">
        <day>01</day>
        <month>12</month>
        <year>1912</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>1912</year>
      </pub-date>
      <volume>3</volume>
      <fpage>373</fpage>
      <lpage>377</lpage>
      <history>
        <date date-type="received" iso-8601-date="1912-06-06">
          <day>06</day>
          <month>06</month>
          <year>1912</year>
        </date>
        <date date-type="accepted" iso-8601-date="1912-08-26">
          <day>26</day>
          <month>08</month>
          <year>1912</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="1912-12-01">
          <day>01</day>
          <month>12</month>
          <year>1912</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 1912 А. А. Лебедев</copyright-statement>
        <copyright-statement xml:lang="en">© 1912 A. A. Lebedev</copyright-statement>
        <copyright-year>1912</copyright-year>
        <copyright-holder xml:lang="ru">А. А. Лебедев</copyright-holder>
        <copyright-holder xml:lang="en">A. A. Lebedev</copyright-holder>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="ru">
          <license-p>Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0)</license-p>
        </license>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="en">
          <license-p>This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/15522">https://pmi.spmi.ru/pmi/article/view/15522</self-uri>
      <abstract xml:lang="ru">
        <p>До сих пор совершенно не установлено общепринятого способа определения полезного действия компрессоров и потому сравнение этих машин различных величин и систем между собой по данным их испытаний является весьма затруднительным, т. к. каждый экспериментатор придерживается своего метода применения. В дальнейшем автор пытается установить рациональные основания определения полезного действия компрессоров, при которых сpaвнение полученных в отдельных случаях результатов не вызывало бы затруднений.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>Until now, no universally accepted method for determining compressor efficiency has been established; therefore, comparing compressors of different sizes and systems based on test data is extremely difficult, since each experimenter adheres to their own approach. In what follows, the author attempts to establish rational principles for determining compressor efficiency, such that the comparison of results obtained in individual cases would not present difficulties.</p>
      </abstract>
    </article-meta>
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