[Thermometrical determination of the postmortem interval by non-linear optimization method].

Q4 Medicine Sudebno-Meditsinskaya Ekspertisa Pub Date : 2024-01-01 DOI:10.17116/sudmed20246705119

V G Nedugov, G V Nedugov

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Abstract

Objective: To develop and implement an online application for the numerical method of determination of the postmortem interval and its limiting faults, caused by errors of measurement processes, based on the Marshall-Hoare law of cooling and dual thermometry of the corpse's core.

Material and methods: The numerical search for a minimum of two variables' target function, obtained from the system of non-linear Marshall-Hoare equations, reflecting the dual thermometry of the corpse's core was performed. The code of online program was written in Python 3 programming language.

Results: The method for determination of the postmortem interval, based on iterative algorithm of non-linear optimization, allowing by dual thermometry of the corpse to consider the uniqueness of its cooling conditions, as well as to calculate the degree of uncertainty of computational estimations, caused by the impact of measurement errors, has been developed. The method is implemented in the format of the Warm Bodies Z online application.

Conclusions: The developed numerical method and its online application are recommended for determining of the postmortem interval.

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[用非线性优化方法确定死后间隔的温度计]。

目的根据马歇尔-霍尔（Marshall-Hoare）冷却定律和尸体内核双重温度测量法，开发并实施一种在线应用程序，用于用数值方法确定死后间隔及其极限故障，这些故障是由测量过程中的误差引起的：对从非线性马歇尔-霍尔方程系统中得到的反映尸体内核双重测温的两个变量目标函数的最小值进行了数值搜索。在线程序代码由 Python 3 编程语言编写：基于非线性优化迭代算法的死后时间间隔确定方法已经开发出来，该方法允许通过尸体的双重温度测量来考虑其冷却条件的唯一性，以及计算因测量误差的影响而导致的计算估计的不确定性程度。该方法以 Warm Bodies Z 在线应用程序的格式实施：建议使用所开发的数值方法及其在线应用程序来确定死后间隔时间。

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.