Mathematical modeling of heat-moisture transfer in soil and the problem of interpretation of data of remote sensing of the Earth's surface

1993 ◽  
Vol 67 (2) ◽  
pp. 2818-2829
Author(s):  
Ya. S. Pidstrigach ◽  
O. B. Karas'ov ◽  
B. V. Gera ◽  
P. A. Zhuk ◽  
E. Ya. Chaplya
Keyword(s):  
Mathematical Modeling ◽  
Remote Sensing ◽  
Moisture Transfer

On the displacements of the contours of the optic-electronic space images. Mathematical modeling of displacement

2017 ◽  
Vol 992 (4) ◽  
pp. 32-38 ◽  
Author(s):  
E.G. Voronin
Keyword(s):  
Mathematical Modeling ◽  
Remote Sensing ◽  
Mathematical Model ◽  
Point Of View ◽  
Design Features ◽  
Space Images ◽  
Electronic Imaging ◽  
Measuring Accuracy ◽  
Physical Laws

The article opens a cycle of three consecutive publications dedicated to the phenomenon of the displacement of the same points in overlapping scans obtained adjacent CCD matrices with opto-electronic imagery. This phenomenon was noticed by other authors, but the proposed explanation for the origin of displacements and the resulting estimates are insufficient, and developed their solutions seem controversial from the point of view of recovery of the measuring accuracy of opticalelectronic space images, determined by the physical laws of their formation. In the first article the mathematical modeling of the expected displacements based on the design features of a scanning opto-electronic imaging equipment. It is shown that actual bias cannot be forecast, because they include additional terms, which may be gross, systematic and random values. The proposed algorithm for computing the most probable values of the additional displacement and ways to address some of the systematic components of these displacements in a mathematical model of optical-electronic remote sensing.

scholarly journals Dynamic Monitoring of Plant Cover and Soil Erosion Using Remote Sensing, Mathematical Modeling, Computer Simulation and GIS Techniques

2013 ◽  
Vol 04 (07) ◽  
pp. 1466-1493 ◽  
Author(s):  
Z. Y. Zeng ◽  
J. Z. Cao ◽  
Z. J. Gu ◽  
Z. L. Zhang ◽  
W. Zheng ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Remote Sensing ◽  
Computer Simulation ◽  
Soil Erosion ◽  
Plant Cover ◽  
Dynamic Monitoring ◽  
Gis Techniques

scholarly journals Mathematical modeling of convection drying process of wood taking into account the boundary of phase transitions

2021 ◽  
Vol 8 (4) ◽  
pp. 830-841
Author(s):  
Ya. I. Sokolovskyy ◽  
◽  
I. B. Boretska ◽  
B. I. Gayvas ◽  
I. M. Kroshnyy ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Phase Transition ◽  
Phase Transitions ◽  
Transition Temperature ◽  
Moisture Transfer ◽  
Drying Process ◽  
Evaporation Zone ◽  
Boundary Change ◽  
Phase Transition Boundary

The article deals with constructing and implementing mathematical models of non-isothermal moisture transfer during drying of anisotropic capillary-porous materials, in particular wood, taking into account the movement of the evaporation zone for non-steady drying schedules, as well as to the development of effective analytical and numerical methods for their implementation. An analytical-numerical method for the determination of non-isothermal moisture transfer under non-steady schedules of the drying process has been developed, taking into account the dynamics of the phase transition boundary change. Calculation relationships are established for determining the phase transition temperature taking into account transport gradients and time for which the relative saturation reaches the boundaries of the phase transition.

scholarly journals Perspectives of the development of complex interdisciplinary hydrological and geocryological research in the North-East of Russia

2021 ◽  
Vol 66 (1) ◽  
Author(s):  
Olga M. Makarieva ◽  
◽  
Nataliia V. Nesterova ◽  
Andrey A. Ostashov ◽  
Anastasia A. Zemlyanskova ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Remote Sensing ◽  
Water Balance ◽  
River Runoff ◽  
Remote Sensing Data ◽  
Field Research ◽  
River Basins ◽  
Soviet Period ◽  
North East ◽  
The North

Climate warming and anthropogenic impact causes transformation of geocryological conditions in the river basins of the North-East of Russia. Changes in the thickness of the active layer, configuration of taliks, types of landscapes and other factors lead to transformation of water exchange processes between surface and groundwater runoff. This is manifested in the seasonal redistribution of the components of the water balance, accelerated melting of aufeis, change in the ratio of waters of different genesis in the structure of river runoff. As a result, natural and anthropogenic risks that affect the safe and efficient development of infrastructure and socio-economic processes are increasing. At the same time the system of observations developed in the Soviet period has been practically destroyed in the region. This paper offers a vision of organizing complex multidisciplinary research to assess and project the changes in the conditions of underground and surface water interaction in natural and disturbed river basins of the cryolithozone of the North-East of Russia, including for solving applied problems, based on permafrost, hydrology, hydrogeology, landscape science and geophysics with applications of remote sensing and field research integrated through mathematical modeling methods. To achieve the goal, the identification of natural and disturbed landscapes using remote sensing data, and key areas for detailed research will be selected. Geophysical and drilling works will be carried out within the sites to establish permafrost-hydrogeological conditions, monitoring stations will be equipped to determine hydrogeological, hydrometeorological and geocryological characteristics, including sampling for isotopic and hydrogeochemical studies. As the main key sites, it is proposed to use the area of ​​the Kolyma water-balance station and the site on Anmangynda aufeis, for which there are long-term observation series in the 20th century. Field data will become the basis for improving the mathematical model of runoff formation, considering the relationship between groundwater and river runoff in the conditions of permafrost. Mathematical modeling will make it possible to quantitatively analyze the water balance of rivers considering various factors and project water availability both for specific industrial facilities and for the region as a whole.

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