About need of calculations for the steel framework building in temperature influences conditions

Otrosh, Yurii; Semkiv, Oleg; Rybka, Evgenіy; Kovalov, Andrіі

doi:10.1088/1757-899x/708/1/012065

Cited by 45 publications

(38 citation statements)

References 12 publications

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“…Issues related to the STF of fires in actual premises are neither considered nor resolved. These methods make it possible to describe a deterministic change in the parameters of the environment, taking into consideration the characteristics of premises over time [11]. That means that such IF methods are intended only for modeling fires in specific premises at the stage of planning fire prevention measures and cannot be used for the purpose of operational IF STF under actual conditions.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Short-term forecast of fire in the premises based on modification of the Brown’s zero-order model

Поспелов¹,

Rybka

Krainiukov

et al. 2021

EEJET

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This paper reports the rationale for the modification of Brown’s zero-order model, which ensures increased accuracy of the short-term fire forecast based on the use of the current measure of recurrence in the increments of the state of the air environment in the premises. A special feature of the proposed model modification is that the a priori model of the dynamics of the level of the time series of the measure of the current recurrence of increments in the air environment states determined by the dangerous factors of the fire has been modified. In this case, it is proposed that the new a priori model should take into consideration additionally the value of the current increments of the level of the studied time series. That makes it possible to negligibly reduce errors of the short-term forecast of fire in the premises without significantly complicating Brown’s zero-order model while retaining all its implementing advantages. The provided accuracy of the forecast for one step in advance on the basis of a time series of measures of the current recurrence of increments of the state of the air environment, determined from the experimental data during the ignition of alcohol and timber in a laboratory chamber, has been investigated. The considered quantitative indicators of forecast accuracy are the absolute and average errors exponentially smoothed with a parameter of 0.4. It has been established that for the proposed modification the value of the average absolute error does not exceed 0.02 %. That means that an error of the short-term forecast of a fire in the premises based on the proposed modification is an order of magnitude less than that in the case of using known Brown’s model at the smoothing parameter from an unclustered set. The results from the ignition of alcohol and timber in the laboratory chamber, in general, indicate significant advantages of using the proposed modification of Brown’s zero-order model for a short-term forecast of a fire in the premises.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Short-term forecast of fire in the premises based on modification of the Brown’s zero-order model

Поспелов¹,

Rybka

Krainiukov

et al. 2021

EEJET

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“…The efficiency of the developed method (3) was tested on the example of actual AAP concentrations. Typical gaseous AAPs from vehicles [47], fires [48], and accidents at high-risk facilities [49] were considered as the main pollutants. The concentrations of gaseous pollutants were measured at a specific point in the city.…”

Section: Testing the Efficiency Of The Proposed Methods Using The Exammentioning

confidence: 99%

Construction of a method for detecting arbitrary hazard pollutants in the atmospheric air based on the structural function of the current pollutant concentrations

Sadkovyi

Поспелов²,

Andronov

et al. 2020

EEJET

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“…To test the proposed method, we measured the concentration of three pollutants at the predefined point of control within actual urban infrastructure whose air pollution level was about 37 units based on the AQI scale (USA). When choosing the type of experimental pollutants, we took into consideration the sources of pollution characteristic of urban infrastructure, caused by motor vehicles [26], fires [27,28], and industrial enterprises [29]. In addition, the relation between pollutants and acid rain and the poisoning of aquifers was taken into consideration [30].…”

Section: Verifying the Proposed Methods Using The Actual Measurements mentioning

confidence: 99%

Development of a method for detecting dangerous states of polluted atmospheric air based on the current recurrence of the combined risk

Поспелов¹,

Kovrehin²,

Rybka³

et al. 2020

EEJET

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Information and controlling system 49 tools and methods that allow the real-time detection of dangerous conditions of the contaminated atmosphere, as well as preventing their occurrence, in order to prevent disruption of regular human life activities, are of particular relevance. This is due to the need to employ these tools and methods in the information and control systems to monitor and manage security in urban areas experiencing AP, as well as in the elimination of accidents and emergencies related to AP.

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About need of calculations for the steel framework building in temperature influences conditions

Cited by 45 publications

References 12 publications

Short-term forecast of fire in the premises based on modification of the Brown’s zero-order model

Short-term forecast of fire in the premises based on modification of the Brown’s zero-order model

Construction of a method for detecting arbitrary hazard pollutants in the atmospheric air based on the structural function of the current pollutant concentrations

Development of a method for detecting dangerous states of polluted atmospheric air based on the current recurrence of the combined risk

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