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<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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Discrete and Continuous Models and Applied Computational Science</journal-id><journal-title-group><journal-title xml:lang="en">Discrete and Continuous Models and Applied Computational Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Discrete and Continuous Models and Applied Computational Science</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-4670</issn><issn publication-format="electronic">2658-7149</issn><publisher><publisher-name xml:lang="en">Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">8592</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Heuristic Approach to the Problem ofMinimal Extension of a Communication Network and Its AssessmentBased on a Specialized Class of Weighted Digraphs</article-title><trans-title-group xml:lang="ru"><trans-title>Эвристический подход к проблеме минимального расширениякоммуникационной сети и его оценка, основанная на использовании специального класса графов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gordonov</surname><given-names>A</given-names></name><name xml:lang="ru"><surname>Гордонов</surname><given-names>А</given-names></name></name-alternatives><bio xml:lang="en">Кафедра вычислительной техники; Колледж Стейтен Айленда, Нью-Йоркский городской университет; College of Staten Island, City University of New York</bio><bio xml:lang="ru">Кафедра вычислительной техники; Колледж Стейтен Айленда, Нью-Йоркский городской университет</bio><email>-</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Petingi</surname><given-names>L</given-names></name><name xml:lang="ru"><surname>Петинжи</surname><given-names>Л</given-names></name></name-alternatives><bio xml:lang="en"> ; College of Staten Island, City University of New York</bio><email>-</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">College of Staten Island, City University of New York</institution></aff><aff><institution xml:lang="ru">Колледж Стейтен Айленда, Нью-Йоркский городской университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">College of Staten Island, City University of New York</institution></aff><aff><institution xml:lang="ru"></institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2008-04-15" publication-format="electronic"><day>15</day><month>04</month><year>2008</year></pub-date><issue>4</issue><issue-title xml:lang="en">NO4 (2008)</issue-title><issue-title xml:lang="ru">№4 (2008)</issue-title><fpage>61</fpage><lpage>67</lpage><history><date date-type="received" iso-8601-date="2016-09-08"><day>08</day><month>09</month><year>2016</year></date></history><permissions><copyright-statement xml:lang="ru">Copyright ©; 2008, Гордонов А., Петинжи Л.</copyright-statement><copyright-year>2008</copyright-year><copyright-holder xml:lang="ru">Гордонов А., Петинжи Л.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/miph/article/view/8592">https://journals.rudn.ru/miph/article/view/8592</self-uri><abstract xml:lang="en">In the paper we are presenting a heuristic approach to solve the problem of changing network topology by minimally extending a digraph G′ through adding edges from a given spanning supergraph G of G', such that the sum of the costs of the new edges is minimum, and in the new graph the end-to-end delay between two distinguished vertices s and t meets a predefined time constraint (ME problem). We develop a heuristic based upon the Genetictype algorithm technique. Moreover, the application of this heuristic is justified and is shown that the solution of ME problem belongs to the NP-hard computational class.
            </abstract><trans-abstract xml:lang="ru">В статье представлен эвристический подход к проблеме изменения топологии сети путём минимального расширения ориентированного графа G' с помощью добавления рёбер из суперграфа G графа G' таким образом, что сумма стоимостей новых рёбер минимальна и общая задержка между двумя выделенными узлами s и t удовлетворяет заранее определённым ограничениям. Для решения этой проблемы авторами разработан алгоритм генетического типа. Более того, проведена оценка эвристического подхода с использованием специального класса ориентированных графов, и показано, что решение проблемы минимального расширения коммуникационной сети с ограничениями на задержку принадлежит к классу NP-полных вычислительных задач.
            </trans-abstract><kwd-group xml:lang="en"><kwd>networks</kwd><kwd>Genetic Algorithm</kwd><kwd>NP-hard</kwd><kwd>delay and cost constraints</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Handler G. Y., Zang I. A Dual Algorithm for the Constrained Shortest Path Problem // Networks. - Vol. 10. - 1980. - Pp. 293-310.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Gellermann T., Sellmann M., Wright R. Shortest Path Constraints for the Resource Constrained Shortest Path Problem // Lecture Notes in Computer Science. - 2005. - Vol. 3524/2005. - Pp. 201-216.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Sigurd M., Zachariasen M. Constrained Shortest Path // Proceeding of Algorithms-ESA 2004, 12-th Annual European Symposium. - Bergen, Norway: 2004. - P. 802.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Eppstein D. Finding the -Shortest Paths // SIAM J. Computing. - Vol. 28(2). - 1998. - Pp. 652-673.</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>J. Hershberger M. M., Suri S. Finding the Shortest Simple Paths: A New Algorithm and its Implementation // Proceeding of the Fifth Workshop on Algorithm Engineering and Experiments. ALENEX 2003. - Baltimore, MD, USA: 2003. - Pp. 26-36.</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Lawler E. L. A Procedure for Computing the Best Solutions to Discrete Optimization Problems and its Application to the Shortest Path Problem // Management Science. - Vol. 18. - 1972. - Pp. 401-405.</mixed-citation></ref></ref-list></back></article>
