| Nashriyot | Тошкент ахборот технологиялари университети қошидаги, Ахборот-коммуникация технологиялари илмий-инновацион, маркази |
|---|---|
| Shahar | Toshkent |
| ISSN | 2181-8460 |
| e-ISSN | 2181-046X |
| Tashkil etilgan | 2015 |
| Maqolalar soni | 184 |
| OAK holati | Ro‘yxatda |
Along with classical integration and differentiation, the concepts of fractional integral and fractional differential are widely used in modern mathematics. In this work, we construct an optimal quadrature formula for…
The problem of constructing optimal quadrature and interpolation formulas for the approximate calculation of certain integrals and approximation of functions is one of the important problems of computational…
The purpose of the paper is to establish a common fixed point theorem for compatible mappings of type (K) in a complete intuitionistic fuzzy Metric space with example which generalizes and improves various well-known…
The article considers the problem of simultaneously representing three natural numbers as the sum of six prime numbers. It proves a power estimate for the number of triplets, which cannot be simultaneously expressed as…
Now splines are being constructed in different spaces and with different methods, and their application is widely studied. In this work, We construct a parametric spline that belongs ????3,???? space. For this , we will…
The finite difference method is used to numerically solve many problems in physics and engineering described by mathematical physics equations. The basic concepts of difference methods are approximation, stability, and…
In this work we will consider asynchronous iteration algorithms. As is well known in multiprocessor computers the parallel application of iterative methods often shows poor scaling and less than optimal parallel…
The optimization of computational methods in function spaces is one of the main problems in computational mathematics. In this work, using the variational method optimization of difference formulas for an approximate…
There are algebraic and variational approaches of construction in the spline theory. In algebraic approach splines are considered as some smooth piecewise polynomial functions. In the variational approach splines are…
This paper discusses the construction of an optimal quadrature formula based on a functional approach for the numerical calculation of Fourier coefficients. In this case, first we solve the boundary value problem for…
The construction of an optimal interpolation formula within the Hilbert space is the focus of this paper. The difference between a given function and an interpolation formula is estimated by the norm of the error…
In this work, we consider system of linear and nonlinear Volterra integral equations (VIEs) of the first kind. At first, we have converted system of VIEs of the first kind to an equation of the second kind by…
In the modeling of a number of practical problems, it is brought to the mixed problems imposed on the system of quasi-linear hyperbolic equations. Since there is no exact solution to such problems, they are solved using…
Regimes of stochasticity and chaos are allowed in nonlinear reaction-diffusion systems that describe chemical-reactive, astrophysical, thermal, thermonuclear, plasma, epidemiological and demographic processes. The work…
The article discusses modeling the quality management system of educational information systems (EIS) using fuzzy cognitive maps, as one of the most effective approaches to solving weakly formalized problems. To…
Now in the world there are a lot of diseases threatening humanity and for these medical treatments and diagnostic methods have also improved both in practical and statistical. This paper discusses one of the most…
The article analyzes the work done so far to create a high-quality computer translation. It also describes the approaches, challenges, and solutions in achieving semantically accurate translation in computer…
The article considers a solution to a two-class recognition problem using metric al gorithms based on k-nearest neighbors. The proposed solution options are: the classical KNN algorithm based on a nonparametric estimate…
The paper proposes a method that belongs to the group of intensional methods of pattern recognition, the essence of which is the transition from a system of initial features to a reduced system of models of…
A numerical study was conducted based on the proposed mathematical apparatus of non-stationary technology for filtering a low-concentration solution through a porous medium, taking into account the process of…
In this article, within the framework of a mathematical model of three-phase filtration of incompressible and immiscible liquids and gas without taking into account the difference between phase pressures and…
Based on the developed mathematical software, this paper presents the results of numerical calculations on the task of monitoring and forecasting the concentration of industrial emissions of pollutants (CO2, dust…
Today it is much more difficult to imagine life without computers. There is not a single area that a computer cannot penetrate. Everyday life is rapidly digitizing and unfortunately, more and more people among us are…
This article presents a numerical model and calculation algorithm for solving the problem of two-dimensional oil filtration in a porous medium, in which the change in permeability value when changing reservoir pressure…
In this article, the numerical simulation of a boundary value problem for a fourth order inhomogeneous differential equation with a small parameter at the highest deriva tive is carried out using the preliminary…
Computer virology and its formalization began seventy years ago with the work of Alan Turing. The work and results of von Neumann, Fred Cohen, Leonard Adleman, and others who followed them were groundbreaking. They…
This paper investigates the qualitative properties of self-similar solutions of a nonlinear cross-diffusion system with nonlinear boundary conditions and a source. A self-similar solution of the cross-diffusion problem…
Problems of nonlinear vibrations of products lying on a viscoelastic layer are considered. A mathematical model was constructed in the form of systems of nonlinear integro-differential equations. The main quadratic…
A related conjugate problem is to ensure that industrial facilities are optimally located throughout a region, taking into account global and local sanitary standards. The main parameters for the spread of harmful…
The problem of the impact of a longitudinal wave on a system consisting of successively located wells and pipelines of finite length, interacting with soil by elastic-viscous law is considered in the article. The ends…
A mathematical model for calculating the vibrations of three-layer rods under spatial loading is developed in the article. Variations of kinetic and potential energies and the work of external forces, substituted into…
The article covers the theoretical and practical aspects of the mathematical model for predicting the movement and level of underground water based on the studied literature. An improved mathematical model based on…
This article presents a numerical solution to the boundary inverse problem for the equation of relaxation filtration in porous media under elastic conditions. To solve the problem, the marching method of De Sousa was…
The paper presents the problem of numerical calculation of turbulent flow in a channel with an obstacle based on the COMSOL MULTIPHYSICS software package. Turbulent flow in a channel with an obstacle is a complex…
The analysis and prediction of pollutant dispersion in the atmosphere continue to be crucial areas of environmental research. Mathematical models are the most effective tools for identifying and understanding the…
This article is devoted to the problem of assessing the level of information security of educational information systems in the context of digital transformation of society. It proposes a methodology based on expert…
Filtering stop words is an important task when processing text queries for information retrieval in large data sets. Existing mathematical models of this problem are not suitable for all families of natural languages…
Artificial intelligence-based methods can significantly improve the traditional expen sive drug development process, given the fact that various generative models are already widely used in chemistry. Generative models…
The paper examines the hydrodynamic process of in-situ leaching, used for the ex traction of expensive metals from ore deposits by acid treatment of the collector. For a comprehensive study, monitoring and forecasting…
The article analyzed the accumulated experience in the development of oil fields, algorithms for solving various filtration problems, the development of computer programs for the design, forecasting and analysis of oil…
A mathematical model has been developed for studying and predicting the process of transport and diffusion of harmful substances in the surface layer of the atmosphere. The model is based on the fundamental laws of…
This article discusses the mathematical modeling of the processes of the deformed state of mesh plates with a complex configuration of the area in the plan. In particular, a mathematical model of the deformed state…
In the work, new model equations in deformations for orthotropic bodies are proposed, from which, in a particular case, the well-known differential equations for the compat ibility of deformations for isotropic bodies…
The article examines McSherry’s mathematical model, taking into account heredity, to describe artificial ECGs. The mathematical model consists of three ordinary nonlinear differential equations with derivatives of…
The paper considers the application of the optimal quadrature formula in the space to numerical solution of linear Fredholm integral equations of the second kind. The results of specific examples are analyzed. The exact…
In this paper, we study the problem of stabilizing the equilibrium state for a hyper bolic system with negative nonlocal characteristic velocities and measurement error. The formulation of a mixed boundary control…
The problem of dynamic vibration dampers of hereditarily deformable systems with f inite numbers of degrees of freedom is considered. The rheological properties of the spring (suspension) are taken into account using an…
This article presents the results of studies on the theory of filtration in an accurate forecast of changes in the level of groundwater during irrigation in the republic, as well as in assessing the impact of artificial…
The paper explores a mathematical model for suspension filtration in a porous medium, incorporating a mass balance equation for suspended particles and kinetic equa tions for both irreversible and reversible particle…
The work considers the process of filtration of water and oil phases, taking into ac count the deformation of the porous medium, opened by a system of production wells. The wells are grouped in rows. We assume that oil…