lazareva_4.pdf303.55 KB
At INP SB RAS, various mechanisms for the erosion of tungsten samples
during the pulsed heating were studied. Data were obtained that made it
possible to analyze the experimental results of the surface temperature dynamics
taking into account the cooling due to the vaporation in vacuum. A numerical
model was...
medvedev_2.pdf746.3 KB
A two-dimensional case of the process of laminar flow passing through
a pipe constriction is investigated. The two-dimensional statement corresponds
to the case with a three-dimensional flow between two parallel planes. A cellular
automaton model of a flow is used, which has an integer alphabet of cell states and
a...
migov_1.pdf608.11 KB
The problem of the network reliability calculation is studied. As the
network reliability we mean the classical reliability measure, i.e. the network probabilistic connectivity. It is assumed that the network has unreliable communication
links and perfectly reliable nodes. The problem of computing this characteristic is
known to be NP-hard. For...
snytnikov_2.pdf1.08 MB
Computational plasma physics problems are a wide field with its own
hardware, software and scheduling strategies. There is a set of physical phenonena,
mathematical equations, numerical approaches, programming strategies and architecture concepts directly followed by each other. This means that an efficient code
for the plasma physics must involve all...
tarkov_5.pdf192.63 KB
The influence of the weight quantization levels number on a capsule
neural network functioning quality is studied. The network is tested on the MNIST
dataset recognition. It is shown that to achieve the performance of the network
with continuous weights it is enough to have 16 levels of uniform quantization...
imomnazarov_5.pdf466.11 KB
A linear two-dimensional problem in the form of dynamic equations of porous media for the components of velocities, stresses and pressure is considered. Dynamic equations are based on conservation laws and are consistent with the thermodynamics conditions. The medium is considered to be ideal (there is no energy loss in...
Khazivaliev_Mikheeva_001.pdf2.04 MB
In this paper, a cosmogenic "orbital" model of formating astroblemes on the Earth's surface is used for the search for new large structures of the impact origin. Because of the only known exact parameter of this model is the distance of 23.25° between the round-the-world turns of a cosmic body...
korobov.pdf630.56 KB
This paper deals with the implementation of the statement of the second initial condition for a system of dynamic equations of a two-phase onedimensional medium. The need to solve such a problem arises, for example, in the case when the time conditions are specified at the initial and final moments...
marchuk_13.pdf421.28 KB
The new method for the tsunami travel times calculation to the nodes of rectangular grid was developed and tested. The algorithm is based on constructing the wave front segment inside the grid cell using tsunami arrival times to the cell angles. Testing the method proposed shows the better quality of...
Michailov.pdf342.56 KB
In this paper, we consider the results of the numerical simulation of the propagation of seismic and acousto-gravitational waves for the spatially inhomogeneous "Atmosphere-Earth" model. The seismic wave propagation in an elastic half-space is described by a system of first order dynamic equations of the elastic theory through interconnection of...
Mikheeva_001.pdf645.22 KB
To study the swarm sequences of earthquakes in the areas of plate convergence and divergence, the parameters: surface wave magnitude MS and depth H are used, as well as one of the characteristics of the seismic regime — creepex CrNcat, included in the complex of the...
salaev.pdf197.59 KB
The Cauchy problem for a one-dimensional system of equations of the Hopf type is considered. A theorem on the solvability of the considered Cauchy problem in the class of analytic functions has been proved.
boronina.pdf324.28 KB
Conditional stability of explicit schemes in finite differences complicates the choice of a time step. The increase in the number of the grid nodes for more precise computations and the corresponding space step decrease leads to the increase in computer costs due to the decreasing of the time step. We...
dudnikova.pdf381.51 KB
The self-consistent evolution of the ion-acoustic collisionless shock with shock-reflected ions is numerically studied with kinetic simulations. We want to compare different approaches to the shock simulation based on the PIC-method. The results of one-dimensional fully kinetic simulation for both plasma components with the real ion-to-electron mass ratio are compared...
genrikh.pdf297.61 KB
Today the method for the development of portable numerical simulation programs is very important because of the two main reasons. The first reason is the diversity of supercomputer architectures in Top500 and the second one is a demand for using the most powerful computers to simulate, for example, plasma. The...
lazareva.pdf512.76 KB
The paper reviews the problem of forecasting the possible maximum pressure at the well-head, at the well-bore and at near-wellbore zone of reservoir during the process of new stimulation technology like reactive chemistry application. The technology provides stimulation by thermobaric effects. This impact occurs as a result of thermal decomposition...
perepechko.pdf751.2 KB
This paper investigates a magma flow in permeable zones of the lithosphere. The model equations describing the dynamics of saturated porous media both without tangential stresses and with them are presented. The phenomenological method used for deriving the equations provides the thermodynamic correctness. Based on the model of the heterophase...
prigarin.pdf374.42 KB
This paper deals with an ill-posed problem to determine the size distribution for water drops in a cloud from a given scattering phase function. Numerical experiments have shown that a method based on non-negative least squares with additional requirements of smoothness can be used to solve the ill-posed problems.
sapetina.pdf325.44 KB
In order to create systems of vibroseismic monitoring for earthquakeprone areas it is needed to carry out the simulation of seismic wave propagation in the media typical of volcanic structures. To this end it is required to develop supercomputer technologies for decreasing the computation time and simulation of "big" 3D...
stoyanovskaya.pdf629.72 KB
New parallel algorithm is developed for simulating the dynamics of a thin circumstellar disk. It is based on the combination of a gridless method of smoothed particle hydrodynamics (SPH) and the grid-based convolution method for calculating a gravitational potential. To develop the algorithm, we made software profiling of numerical experiments...
borovko_3.pdf331.53 KB
Potential vorticity (PV) streamers and cutoffs are indicators to the Rossby wave breaking (RWB) near the extratropical tropopause. In the Rossby waves breaking, the formation of elongated high-PV stratospheric air tongues extending to the equator and tropospheric low PV air tongues extending to the pole are obtained. There are two...
iakshina_0.pdf985.64 KB
A numerical simulation of the water and sea ice dynamics of the Arctic Ocean was carried out to identify the physical mechanisms that determine the variability of the state of the ice cover. For the research, we used the coupled ocean-ice regional numerical model of the North Atlantic and the...
kraineva_0.pdf683.79 KB
The Laptev Sea, one of the most severe Arctic shelf seas is the focus of the international research on account of a pronounced climate change (warming of the atmosphere temperature, lengthening of the summer open-water season, reduction of the ice extent, rapid coastal erosion). In recent years, as compared to...
kravtchenko.pdf1.67 MB
In this paper, the adaptation of the SibCIOM three-dimensional thermodynamic model is considered that allows modeling a three-dimensional velocity and temperature distribution, as well as a two-dimensional field of the ice cover for the Novosibirsk reservoir with seasonal changes in the water level. An analysis of the numerical results shows...
krylova_2.pdf671.92 KB
A hydrologically correct digital model of the bottom topography of the Lena River basin with a resolution of (1/3)° x (1/3)° is constructed. Based on the linear model of forming a water balance in the river-bed network and a model network of river channels schematized in the form of a...
penenko_5.pdf1.63 MB
In the data assimilation algorithms for the air quality applications, the source identification problem can be considered as an auxiliary one for the solution of the model state function continuation problem. The algorithm based on the ensembles of the adjoint problem solutions is applied to solve the inverse problems. The...
raputa_8.pdf1.25 MB
The satellite observations of smoke plumes from the pipes of power stations make possible to obtain prompt information about the processes of impurities distribution in the atmosphere and about the source parameters. This paper proposes a method of numerical reconstruction of characteristics of the active stage of the smoke stream...