Dynamics of skewness and kurtosis of dangerous environmental parameters in the event of fire

Pospelov, Boris та Andronov, Vladimir та Bezuhla, Yuliia та Lukysha, RTatianaoman та Lutsenko, Tatiana та Kozar, Yurii та Kravtsov, Mikhail та Gula, Larisa та Nepsha, Oleksandr та Zavialova, Tetiana (2023) Dynamics of skewness and kurtosis of dangerous environmental parameters in the event of fire. Eastern-European Journal of Enterprise Technologies (5/10). с. 53-62. ISSN 1729-3774

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Резюме

The object of this study is the dynamics of skewness and kurtosis of the selective distribution of dangerous parameters of the gas environment in the current time when materials are ignited. The theoretical substantiation of the methodology for determining the dynamics of skewness and kurtosis based on a sample of an arbitrary size of dangerous parameters of the gas medium moving in the current time of observation has been performed. Thresholds for current skewness and kurtosis are determined depending on sample size and null hypothesis significance levels. The procedure makes it possible to investigate the peculiarities of the dynamics of skewness and kurtosis and to identify moments of time for which alternative hypotheses (stability of parameter dynamics) are valid. Laboratory experiments were conducted to study the dynamics of skewness and kurtosis in terms of carbon monoxide concentration, smoke density, and the temperature of the gas environment during the ignition of alcohol and textiles. The results indicate that the investigated dangerous parameters are generally not Gaussian in the observation interval. It was found that the nature of the dynamics of measures of the current sample distributions of dangerous parameters depends on the type of ignition material and the dangerous parameter. It was established that in the absence of ignition, the dynamics of skewness and kurtosis of dangerous parameters is characterized by different directional skewness and kurtosis. In the event of ignition, the dynamics of skewness and kurtosis are fluctuating (from –4 to 18), which indicates the instability of the development of the dangerous parameter over time. The specified procedure creates an opportunity to detect the instability of the development of a dangerous parameter, which in practice makes it possible to detect the occurrence of fires (with a given reliability) in order to eliminate them and prevent the occurrence of a fire

Тип елементу :	Стаття
Теми:	Q Наука > Екологія
Підрозділи:	Природничо-географічний факультет > Кафедра фізичної географії і геології > Фахові видання
Користувач, що депонує:	Кафедра географії та туризму
Дата внесення:	29 Груд 2023 12:00
Останні зміни:	29 Груд 2023 12:00
URI:	http://eprints.mdpu.org.ua/id/eprint/13333

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