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<article article-type="research-article" dtd-version="1.2" xml:lang="ru" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><front><journal-meta><journal-id journal-id-type="issn">2518-1092</journal-id><journal-title-group><journal-title>Research result. Information technologies</journal-title></journal-title-group><issn pub-type="epub">2518-1092</issn></journal-meta><article-meta><article-id pub-id-type="doi">10.18413/2518-1092-2022-7-1-0-7</article-id><article-id pub-id-type="publisher-id">2701</article-id><article-categories><subj-group subj-group-type="heading"><subject>ARTIFICIAL INTELLIGENCE AND DECISION MAKING</subject></subj-group></article-categories><title-group><article-title>&lt;strong&gt;STRUCTURAL ELEMENTS OF CALCULUS OF SYSTEMS&amp;nbsp;AS FUNCTIONAL OBJECTS&lt;/strong&gt;</article-title><trans-title-group xml:lang="en"><trans-title>&lt;strong&gt;STRUCTURAL ELEMENTS OF CALCULUS OF SYSTEMS&amp;nbsp;AS FUNCTIONAL OBJECTS&lt;/strong&gt;</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Zhikharev</surname><given-names>Alexander Gennadievich</given-names></name><name xml:lang="en"><surname>Zhikharev</surname><given-names>Alexander Gennadievich</given-names></name></name-alternatives><email>zhikharev@bsu.edu.ru</email></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Mamatov</surname><given-names>Roman Aleksandrovich</given-names></name><name xml:lang="en"><surname>Mamatov</surname><given-names>Roman Aleksandrovich</given-names></name></name-alternatives></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Gubkin</surname><given-names>Alexey Vladimirovich</given-names></name><name xml:lang="en"><surname>Gubkin</surname><given-names>Alexey Vladimirovich</given-names></name></name-alternatives></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Ignatenko</surname><given-names>Pavel Vladimirovich</given-names></name><name xml:lang="en"><surname>Ignatenko</surname><given-names>Pavel Vladimirovich</given-names></name></name-alternatives></contrib></contrib-group><pub-date pub-type="epub"><year>2022</year></pub-date><volume>7</volume><issue>1</issue><fpage>0</fpage><lpage>0</lpage><self-uri content-type="pdf" xlink:href="/media/information/2022/1/Информационные_технологии_7_1-7_MCEzXLU.pdf" /><abstract xml:lang="ru"><p>The article discusses the basics of the original formal apparatus &amp;ndash; the calculus of systems as functional objects. Calculus is considered in the context of its use to formalize the procedures of system-object analysis of weakly formalized systems. The basic concepts of calculus are considered, such as: a system-object model, a node object, a streaming object, connections of a system-object model, structural components of streaming and node objects. An example of an abstract system and its formal representation by means of calculus is considered. In addition, an example is given of using the method of system-object simulation modeling to build a model of a combined channel signal generation system in order to study its level of resistance to interference.</p></abstract><trans-abstract xml:lang="en"><p>The article discusses the basics of the original formal apparatus &amp;ndash; the calculus of systems as functional objects. Calculus is considered in the context of its use to formalize the procedures of system-object analysis of weakly formalized systems. The basic concepts of calculus are considered, such as: a system-object model, a node object, a streaming object, connections of a system-object model, structural components of streaming and node objects. An example of an abstract system and its formal representation by means of calculus is considered. In addition, an example is given of using the method of system-object simulation modeling to build a model of a combined channel signal generation system in order to study its level of resistance to interference.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>system-object approach</kwd><kwd>system modeling</kwd><kwd>system-object model</kwd><kwd>node object</kwd><kwd>stream object</kwd></kwd-group><kwd-group xml:lang="en"><kwd>system-object approach</kwd><kwd>system modeling</kwd><kwd>system-object model</kwd><kwd>node object</kwd><kwd>stream object</kwd></kwd-group></article-meta></front><back><ref-list><title>Список литературы</title><ref id="B1"><mixed-citation>1.&amp;nbsp;&amp;nbsp; Matorin S.I., Zhikharev A.G., Zimovets O.A., etc. Systems theory and system analysis: textbook. Edited by S.I. Matorin. - Moscow; Berlin: Directmedia Publishing. 2020. 509 p.</mixed-citation></ref><ref id="B2"><mixed-citation>2.&amp;nbsp;&amp;nbsp; Matorin S.I., Zhikharev A.G., Zaitseva N.O. 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