Modelling full-colour images of Earth: simulation of radiation brightness field of Earth’s atmosphere and underlying surface

Хохлов, В. А.; Lukin, Valeriy; Khokhlov, Sergei

doi:10.1080/19475683.2022.2064911

Cited by 3 publications

(3 citation statements)

References 30 publications

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“…During the operation of subway sections, including double-track and single-track running tunnels, the air flowing through the double-track tunnel to its junction with single-track tunnels is mixed with the circulation air flows that occur in areas adjacent to these junctions from stations with single-track tunnels. As a result of this mixing, the temperature of the air circulating between the junction of double-track and double-track tunnels and the station with single-track tunnels will be higher than with the traditional scheme, when the flows of external and circulating air are mixed [16,17,18]. This may lead to an increase in air temperatures at stations adjacent to junctions on the side of single-track tunnels above normative values.…”

Section: Problem Statementmentioning

confidence: 99%

Enhanced methodology for thermal management area assessment of metro lines

Zhikharev

2024

E3S Web of Conf.

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The article analyzes the operation of metro lines with doubletrack and single-track tunnels in the Russian Federation. Simultaneous activation of traffic on single-track and double-track tunnels affects the management of thermal and humidity parameters of the air environment on metro lines. Currently, there is limited experience in using shared lines. The study conducted an analysis of the features in the formation of thermal and ventilation regimes in double-track and single-track subway tunnels. It also examined the temperature regime of the station when mixing air flows from a double-track tunnel between stations and the flow from one of the stations. An algorithm has been defined for controlling the thermal and humidity parameters of the environment in underground structures. Measures are proposed to minimize the consequences of combining air flows and normalize microclimate parameters. The analysis of air mass movement revealed that the air temperature at the station located beyond the junction point of the double-track tunnel section and single-track tunnels is influenced by circulation flows in single-track tunnels, as well as the flow rate and temperature of the air coming from the double-track tunnel.

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Section: Problem Statementmentioning

confidence: 99%

Enhanced methodology for thermal management area assessment of metro lines

Zhikharev

2024

E3S Web of Conf.

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“…3,10,[12][13][14][15][16] Atmospheric transmittance can be obtained by simulation with atmospheric transport modeling software, but for a real-time changing atmospheric system, there is always a discrepancy between model calculations and actual conditions, so accurate real-time measurements are needed to obtain atmospheric transmittance. 14,[17][18][19] The commonly used direct measurement method is usually to find a star with constant radiation (such as the Sun) and observe this radiation source by optical means (spectrometer, filter, grating, etc.) to obtain the atmospheric transmittance.…”

Section: Introductionmentioning

confidence: 99%

LiDAR technology and experimental research for comprehensive measurement of atmospheric transmittance, turbulence, and wind

Yang,

Qiu,

Fang

et al. 2023

J. Appl. Rem. Sens.

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Atmospheric transmittance, turbulence, and wind play a crucial role in the field of laser atmospheric transmission. In response to the demand for comprehensive detection of atmospheric optical parameters, a LiDAR system for comprehensive measurement of atmospheric transmittance, turbulence, and wind (ACW-LiDAR) has been developed through integrated optical and mechanical design. The remote sensing measurement of atmospheric transmittance, turbulence, and wind simultaneously and along a common path has been realized by the ACW-LiDAR. By proposing a limb scanning algorithm, the problem of preference for atmospheric transmittance estimation has been overcome, and the problem of inconvenient turbulence measurement at near-surface has been effectively solved. It is also possible to obtain wind information on the laser transmission route. The experimental results based on the ACW-LiDAR system indicate that the detection distance of atmospheric transmittance is greater than 10 km @ 1064 nm. The detection distance of turbulence is greater than 10 km @ 532 nm. The detection distance of wind is greater than 4 km @ 1550 nm. The comparison between the ACW-LiDAR system and the ground meteorological automatic observation system shows that the variation trend in extinction coefficient, turbulence, and radial wind velocity is consistent, with a correlation better than 0.69, verifying the accuracy of the developed ACW-LiDAR system. The analysis of comprehensive scanning detection indicates that the three key atmospheric parameters mentioned above are interrelated and mutually influencing. So the measurement of the same time and common path of atmospheric transmittance, turbulence, and wind is of great significance. These can provide a theoretical and experimental basis for long-term observation and accumulation of atmospheric parameters, as well as the correction of atmospheric parameters.

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“…The tasks of managing service personnel and evaluating the quality of their work involve numerous controversial issues related to the assessment of individual characteristics and behavior of a person. In this regard, the realization of the same actions may differ even when a single person is operating [5]. Besides individual factors, the worker is affected by a variety of external factors.…”

Section: Introductionmentioning

confidence: 99%

Automatic Detection of Maintenance Scenarios for Equipment and Control Systems in Industry

Koteleva,

Valnev

2023

Applied Sciences

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The well-known methods of scene extraction on video are focused on analyzing the similarity between frames. However, they do not all analyze the composition of the image scene, which may remain the same during maintenance. Therefore, this paper proposes an algorithm for equipment maintenance scene detection based on human hand tracking. It is based on the assumption that, when servicing technological equipment, it is possible to determine the change in repair action by the position of the service engineer’s hands. Thus, certain information and the algorithm that processes these changes allow us to segment the video into actions performed during the service. We process the time series obtained by moving the hand position using spectral singular value decomposition for multivariate time series. To verify the algorithm, we performed maintenance on the control cabinet of a mining conveyor and recorded the work on a first-person video, which was processed using the developed method. As a result, we obtained some scenes corresponding to opening the control cabinet, de-energizing the unit, and checking the contacts with a multimeter buzzer test. A third-person video of motor service was similarly processed. The algorithm demonstrated the results in separate scenes of removing screws, working with a multimeter, and disconnecting and replacing motor parts.

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Modelling full-colour images of Earth: simulation of radiation brightness field of Earth’s atmosphere and underlying surface

Cited by 3 publications

References 30 publications

Enhanced methodology for thermal management area assessment of metro lines

Enhanced methodology for thermal management area assessment of metro lines

LiDAR technology and experimental research for comprehensive measurement of atmospheric transmittance, turbulence, and wind

Automatic Detection of Maintenance Scenarios for Equipment and Control Systems in Industry

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