<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vmireaviz</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник медицинского института «РЕАВИЗ». Реабилитация, Врач и Здоровье</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of the Medical Institute "REAVIZ" (REHABILITATION, DOCTOR AND HEALTH)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-762X</issn><issn pub-type="epub">2782-1579</issn><publisher><publisher-name>РЕАВИЗ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20340/vmi-rvz.2025.1.ICTM.1</article-id><article-id custom-type="elpub" pub-id-type="custom">vmireaviz-1122</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ИНФОРМАЦИОННО-ВЫЧИСЛИТЕЛЬНЫЕ ТЕХНОЛОГИИ В МЕДИЦИНЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INFORMATION TECHNOLOGY IN MEDICINE</subject></subj-group></article-categories><title-group><article-title>Оценка давности наступления смерти методом нелинейного программирования в условиях изменяющейся внешней температуры</article-title><trans-title-group xml:lang="en"><trans-title>Estimation of the postmortem interval by non-linear programming in conditions of changing ambient temperature</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7380-3766</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Недугов</surname><given-names>Г. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nedugov</surname><given-names>G. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Недугов Герман Владимирович - д-р мед. наук, доцент, заведующий кафедрой судебной медицины.</p><p>ул. Чапаевская, д. 89, Самара, 443099</p></bio><bio xml:lang="en"><p>German V. Nedugov - Dr. Sci. (Med), Docent, Head of the Department of Forensic Medicine Samara State Medical University.</p><p>89, Chapaevskaya st., Samara, 443099</p></bio><email xlink:type="simple">nedugovh@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Самарский государственный медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Samara State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>20</day><month>03</month><year>2025</year></pub-date><volume>15</volume><issue>1</issue><fpage>144</fpage><lpage>149</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Недугов Г.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Недугов Г.В.</copyright-holder><copyright-holder xml:lang="en">Nedugov G.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestnik.reaviz.ru/jour/article/view/1122">https://vestnik.reaviz.ru/jour/article/view/1122</self-uri><abstract><p>Цель исследования – оценка возможностей определения давности наступления смерти методом нелинейного программирования в условиях изменяющейся внешней температуры. Выполнено компьютерное моделирование охлаждения ядра трупа в условиях линейно изменяющейся внешней температуры и проанализированы возможности определения посмертного интервала при изменениях внешнего температурного режима методом нелинейного программирования. Установлено, что нелинейное программирование может с успехом применяться для определения давности наступления смерти в условиях изменяющейся внешней температуры. Для этого в вычислительном алгоритме метода в качестве постоянной следует учитывать внешнюю температуру, зарегистрированную при первичной термометрии трупа на месте его обнаружения. Полученные аппроксимационные оценки в зависимости от возрастающего или убывающего характера внешней температуры представляют собой соответственно максимальное или минимальное предельное значение давности наступления смерти. Величина смещения аппроксимационной оценки и собственно давность наступления смерти могут быть вычислены с помощью разработанных регрессионных уравнений, для использования которых требуется предварительное установление значения средней внешней температуры за оцененный методом нелинейного программирования посмертный период. Предложенная адаптация метода нелинейного программирования рекомендуется для экспертного установления давности наступления смерти в условиях изменяющейся внешней температуры.</p></abstract><trans-abstract xml:lang="en"><p>The aim of the study is to evaluate the possibilities of determining the postmortem interval by non-linear programming in conditions of changing ambient temperature. A computer simulation of the cooling of the core of a corpse under conditions of linearly varying ambient temperature was performed and the possibilities of determining the postmortem interval with changes in the ambient temperature regime by non-linear programming were analyzed. It has been established that non-linear programming can be successfully used to determine the postmortem interval in conditions of changing ambient temperature. To do this, the computational algorithm of the method should take into account the ambient temperature recorded during the primary thermometry of the corpse at the place of its discovery as a constant. The obtained approximation estimates, depending on the increasing or decreasing nature of the ambient temperature, represent, respectively, the maximum or minimum limit value of the postmortem interval. The magnitude of the bias of the approximation estimate and the actual time of death can be calculated using the developed regression equations, the implementation of which requires a preliminary determination of the value of the average ambient temperature for the postmortem period estimated by non-linear programming. The proposed adaptation of the non-linear programming method is recommended for expert determination of the postmortem interval in conditions of changing ambient temperature.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Давность наступления смерти [D020964]</kwd><kwd>Нелинейное программирование [D020807]</kwd><kwd>Судебная медицина [D006103]</kwd><kwd>Математическое моделирование [D008958]</kwd><kwd>Посмертные изменения [D020707]</kwd><kwd>Танатология [D013742]</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Postmortem interval [D020964]</kwd><kwd>Nonlinear programming [D020807]</kwd><kwd>Forensic medicine [D006103]</kwd><kwd>Mathematical modeling [D008958]</kwd><kwd>Postmortem changes [D020707]</kwd><kwd>Thanatology [D013742]</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Marshall TK, Hoare FE. Estimating the time of death. The rectal cooling after death and its mathematical expression. Journal of Forensic Sciences. 1962;7(1):56–81.</mixed-citation><mixed-citation xml:lang="en">Marshall TK, Hoare FE. Estimating the time of death. The rectal cooling after death and its mathematical expression. Journal of Forensic Sciences. 1962;7(1):56–81.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Недугов В.Г., Недугов Г.В. Термометрическое определение давности наступления смерти методом нелинейной оптимизации. Судебно-медицинская экспертиза. 2024;67(5):19–23. https://doi.org/10.17116/sudmed20246705119</mixed-citation><mixed-citation xml:lang="en">Nedugov VG, Nedugov GV. Thermometrical determination of the postmortem interval by non-linear optimization method. Forensic Medical Expertise. 2024;67(5):19–23. (In Russ.) https://doi.org/10.17116/sudmed20246705119</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Powell MJD. A Hybrid Method for Nonlinear Equations. In P. Rabinowitz (ed.), Numerical Methods for Nonlinear Algebraic Equations. London, New York: Gordon and Breach Science Publishers. 1970:87-114.</mixed-citation><mixed-citation xml:lang="en">Powell MJD. A Hybrid Method for Nonlinear Equations. In P. Rabinowitz (ed.), Numerical Methods for Nonlinear Algebraic Equations. London, New York: Gordon and Breach Science Publishers. 1970:87-114.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Moré JJ, Sorensen DC, Hillstrom KE, Garbow BS. The MINPACK Project. In W.J. Cowell (ed.), Sources and Development of Mathematical Software. Prentice-Hall,1984:88-111.</mixed-citation><mixed-citation xml:lang="en">Moré JJ, Sorensen DC, Hillstrom KE, Garbow BS. The MINPACK Project. In W.J. Cowell (ed.), Sources and Development of Mathematical Software. Prentice-Hall,1984:88-111.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Nocedal J, Wright SJ. Numerical Optimization. New York: Springer-Verlag, 2006. https://doi.org/10.1007/978-0-387-40065-5</mixed-citation><mixed-citation xml:lang="en">Nocedal J, Wright SJ. Numerical Optimization. New York: Springer-Verlag, 2006. https://doi.org/10.1007/978-0-387-40065-5</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Недугов Г.В. Двойная экспоненциальная модель охлаждения трупа в условиях линейно изменяющейся внешней температуры. Судебная медицина. 2021;7(4):19–28. https://doi.org/10.17816/fm429</mixed-citation><mixed-citation xml:lang="en">Nedugov GV. Double exponential model of corpse cooling under conditions of linearly varying ambient temperature. Russian Journal of Forensic Medicine. 2021;7(4):19–28. (In Russ.). https://doi.org/10.17816/fm429</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Henssge C. Death time estimation in case work. I. The rectal temperature time of death nomogram. Forensic science international. 1988; 38(3-4):209-236. https://doi.org/10.1016/0379-0738(88)90168-5</mixed-citation><mixed-citation xml:lang="en">Henssge C. Death time estimation in case work. I. The rectal temperature time of death nomogram. Forensic science international. 1988; 38(3-4):209-236. https://doi.org/10.1016/0379-0738(88)90168-5</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Henssge C. Rectal temperature time of death nomogram: dependence of corrective factors on the body weight under stronger thermic insulation conditions. Forensic science international. 1992;54(1):51-66. https://doi.org/10.1016/0379-0738(92)90080-G</mixed-citation><mixed-citation xml:lang="en">Henssge C. Rectal temperature time of death nomogram: dependence of corrective factors on the body weight under stronger thermic insulation conditions. Forensic science international. 1992;54(1):51-66. https://doi.org/10.1016/0379-0738(92)90080-G</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Zerdazi D, Chibat A, Rahmani FL. Estimation of postmortem period by means of artificial neural networks. Electronic Journal of Applied Statistical Analysis. 2016;9(2), 326-339.</mixed-citation><mixed-citation xml:lang="en">Zerdazi D, Chibat A, Rahmani FL. Estimation of postmortem period by means of artificial neural networks. Electronic Journal of Applied Statistical Analysis. 2016;9(2), 326-339.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Dani LM, Tóth D, Frigyik AB, Kozma Z. Beyond Henssge's Formula: Using Regression Trees and a Support Vector Machine for Time of Death Estimation in Forensic Medicine. Diagnostics (Basel). 2023;13(7):1260. https://doi.org/10.3390/diagnostics13071260</mixed-citation><mixed-citation xml:lang="en">Dani LM, Tóth D, Frigyik AB, Kozma Z. Beyond Henssge's Formula: Using Regression Trees and a Support Vector Machine for Time of Death Estimation in Forensic Medicine. Diagnostics (Basel). 2023;13(7):1260. https://doi.org/10.3390/diagnostics13071260</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Mall G, Eckl M, Sinicina I, Peschel O, Hubig M. Temperature-based death time estimation with only partially known environmental conditions. International Journal of Legal Medicine. 2005;119(4):185-194. https://doi.org/10.1007/s00414-004-0461-4</mixed-citation><mixed-citation xml:lang="en">Mall G, Eckl M, Sinicina I, Peschel O, Hubig M. Temperature-based death time estimation with only partially known environmental conditions. International Journal of Legal Medicine. 2005;119(4):185-194. https://doi.org/10.1007/s00414-004-0461-4</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Rodrigo MR. A Nonlinear Least Squares Approach to Time of Death Estimation Via Body Cooling. Journal of Forensic Sciences. 2016;61(1):230-3. https://doi.org/10.1111/1556-4029.12875</mixed-citation><mixed-citation xml:lang="en">Rodrigo MR. A Nonlinear Least Squares Approach to Time of Death Estimation Via Body Cooling. Journal of Forensic Sciences. 2016;61(1):230-3. https://doi.org/10.1111/1556-4029.12875</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
