[Mathematical programming in assessment of the postmortem interval under conditions of linearly varying external temperature].

Q4 Medicine

Sudebno-Meditsinskaya Ekspertisa Pub Date : 2025-01-01 DOI:10.17116/sudmed20256804134

V G Nedugov, G V Nedugov

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引用次数: 0

Abstract

Objective: To develop and implement a method for determining the postmortem interval and the marginal errors of its estimates under conditions of linearly varying external temperature in the format of an online application.

Material and methods: A computer-assissted numerical search for the absolute minimum point of the objective function obtained from a system of nonlinear equations reflecting the results of double rectal or cranioencephalic thermometry of a corpse under conditions of linearly varying external temperature was carried out. The search algorithm was generalized to possible marginal errors in measuring the initial indicators of temperature and time. The code of the online program was compiled in Python 3.

Results: A method based on an iterative nonlinear optimization algorithm for determining the postmortem interval in linearly varying external temperature has been developed. It allows using double rectal or cranioencephalic thermometry to consider the uniqueness of the corpse's cooling conditions using double rectal or cranioencephalic thermometry, as well as to find the degree of uncertainty of computational estimates of the method caused by the impact of measurement errors. The method is implemented in the format of the Warm Bodies Z 2 online application.

Conclusion: The developed method and the online application implementing it are recommended to establish the postmortem interval.

查看原文本刊更多论文

[在外部温度线性变化的条件下评估死后时间间隔的数学规划]。

目的：建立并实施一种在外部温度线性变化条件下确定死后间隔及其估计边际误差的在线应用方法。材料和方法：利用计算机辅助数值搜索，从反映在外部温度线性变化条件下尸体双直肠或颅脑测温结果的非线性方程组中得到目标函数的绝对极小点。将搜索算法推广到测量温度和时间初始指标时可能出现的边际误差。在线程序的代码是用Python 3编译的。结果：建立了一种基于迭代非线性优化算法的确定外部温度线性变化下死后时间间隔的方法。它允许使用双直肠或颅脑测温来考虑使用双直肠或颅脑测温的尸体冷却条件的独特性，以及发现由于测量误差的影响而导致的方法计算估计的不确定程度。该方法以Warm Bodies z2在线应用程序的格式实现。结论：推荐采用开发的方法和在线应用程序建立尸检间隔。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sudebno-Meditsinskaya Ekspertisa Medicine-Pathology and Forensic Medicine

CiteScore

0.60

自引率

0.00%

发文量

期刊介绍： The journal is concerned with the theory and practice of forensic medicine - the problems of thanatology, traumatology, toxicology, serology, forensic obstetrics, forensic dentistry, forensic psychiatry, forensic chemistry, physicotechnical methods of investigation, history of forensic medicine and some problems of criminology and legal laws related to forensic medicine. It publishes original studies by Russian authors, casuistry surveys, abstracts and reviews of Russian and foreign literature, scientific information, reports on scientific conferences.