OAK jurnallaridan yig‘ilgan 129907 ta ilmiy maqola: sarlavha, mualliflar, annotatsiya, kalit so‘zlar, DOI va tayyor iqtibos formatlari.
- Solving system of Volterra integral equations of the first kind by modified Adomian decomposition method
Eshkuvatov, Z.K., Salimova, N.M., Khudoyberganov, M.O., Эшкуватов, З.К., Салимова, Н.М., Худойберганов, М.О. · Ҳисоблаш ва амалий математика муаммолари · 2024-12-11
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…
- Investigation of the stability of the modified difference courant, Isaakson and Rees schemes for quasi-linear hyperbolic systems
Khudoyberganov, M.U., Tulyaganova, N.B., Karimov, D.K., Худойберганов, М.У., Туляганова, Н.Б., Каримов, Д.К. · Ҳисоблаш ва амалий математика муаммолари · 2024-12-11
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…
- Research of ecological and medical models using bifurcation parameters methods in finite difference discrete systems
Soleyev, A.S., Rozet, I.G., Mukhtarov, Ya., Солеев, А.С., Розет, И.Г., Мухтаров, Я. · Ҳисоблаш ва амалий математика муаммолари · 2024-12-11
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…
- Quality assessment models based on fuzzy cognitive maps for educational information system
Yorkulov, B.A., Sulyukova, L.F., Ёркулов, Б.А., Сулюкова, Л.Ф. · Ҳисоблаш ва амалий математика муаммолари · 2024-10-11
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…
- Employing various machine learning algorithms to predict mortality after acute myocardial infarction using GUSTO-1 medical data
Sharipov, D.K., Saidov, A.D., Шарипов, Д.К., Саидов, А.Д. · Ҳисоблаш ва амалий математика муаммолари · 2024-10-11
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…
- Morphological analysis of nouns in English to Uzbek machine translation
Khakimov , M.Kh., Bekova, V.G., Хакимов , М.Х., Бекова, В.Г. · Ҳисоблаш ва амалий математика муаммолари · 2024-10-11
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…
- On the efficiency of metric recognition algorithms based on k nearest neighbor
Ignatev , N.A., Tursunmurotov, D.Kh., Игнатьев , Н.А., Турсунмуротов, Д.Х. · Ҳисоблаш ва амалий математика муаммолари · 2024-10-11
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…
- Intensional method for recognizing objects described in a high-dimensional feature space
Фазылов, Sh.Kh., Mirzaev , N.M., Radjabov, S.S., Rabbimov , I.M., Fazilov, Ш.Х., Мирзаев , Н.М., Раджабов, С.С., Раббимов , И.М. · Ҳисоблаш ва амалий математика муаммолари · 2024-10-11
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…
- Numerical study of the filtration process of low-concentrated solutions through a porous medium
Ravshanov, N., Turakulov, J., Равшанов, Н., Туракулов, Ж. · Ҳисоблаш ва амалий математика муаммолари · 2024-10-11
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…
- Application of an object-oriented approach in the problem of three-phase filtration
Uzakov, Z.U., Begulov , O.U., Узаков, З.У., Бегулов , О.У. · Ҳисоблаш ва амалий математика муаммолари · 2024-10-11
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…
- Computational experiments aimed at assessing and predicting the distribution of industrial emissions in the atmospheric basin of the Tashkent region
Ravshanov, N., Nabieva, I., Равшанов, Н., Набиева, И. · Ҳисоблаш ва амалий математика муаммолари · 2024-10-11
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…
- Discrete SMWB model of computer virus transmission research
Eshmamatova, D.B., Yusupov, F.A., Эшмаматова, Д.Б., Юсупов, Ф.А. · Ҳисоблаш ва амалий математика муаммолари · 2024-10-11
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…
- Parallel algorithm for solving the oil filtration problem considering changes in reservoir permeability
Ravshanov, N., Nematov, A., Ismailov, Sh., Равшанов, Н., Неъматов, А., Исмаилов, Ш. · Ҳисоблаш ва амалий математика муаммолари · 2024-10-11
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…
- Numerical simulation of a singularly perturbed fourth order equation by preliminary integration method
Abdurakhimov, B.F., Juraeva, N.T., Абдурахимов, Б.Ф., Джураева, Н.Т. · Ҳисоблаш ва амалий математика муаммолари · 2024-10-11
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…
- Modeling the dynamics of the spread of computer viruses using compositions of Lotka–Volterra mappings
Yusupov, F.A., Юсупов, Ф.А. · Ҳисоблаш ва амалий математика муаммолари · 2024-07-19
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…
- Numerical solution of the cross-diffusion problem with nonlinear boundary conditions and source
Rakhmonov, Z.R., Urunbaev, J.E., Рахмонов, З.Р., Урунбаев, Ж.Э. · Ҳисоблаш ва амалий математика муаммолари · 2024-07-19
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…
- Mathematical modeling of nonlinear vibrations of vibration proof products laying on a viscoelastic layer
Yusupov, M., Юсупов, М. · Ҳисоблаш ва амалий математика муаммолари · 2024-07-19
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…
- Conjugate problem for optimal placement of industrial production facilities
Ravshanov, N., Nabieva, I., Japarov, B.T., Равшанов, Н., Набиева, И., Жапаров, Б.Т. · Ҳисоблаш ва амалий математика муаммолари · 2024-07-19
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…
- Vibrations of systems consisting of underground pipelines and wells under the impact of seismic waves
Khusainova, B.B., Khusainov, S.B., Khusainov, R.B., Хусаинова, Б.Б., Хусаинов, С.Б., Хусаинов, Р.Б. · Ҳисоблаш ва амалий математика муаммолари · 2024-07-19
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…
- Computational algorithm for calculating three-layer rods under spatial loads
Anarova, Sh.A., Shokirov, D.A., Анарова, Ш.А., Шокиров, Д.А. · Ҳисоблаш ва амалий математика муаммолари · 2024-07-19
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…
- Numerical modeling of groundwater filtration in irrigated areas
Ravshanov, N., Murodullaev, B.T., Boborakhimov, B.I., Равшанов, Н., Муродуллаев, Б.Т., Боборахимов, Б.И. · Ҳисоблаш ва амалий математика муаммолари · 2024-07-19
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…
- Numerical solution of the boundary inverse problem for the relaxation filtration equation
Kholiyarov, E.Ch., Turaev, D.Sh., Buriev, J.N., Холияров, Э.Ч., Тураев, Д.Ш., Буриев, Ж.Н. · Ҳисоблаш ва амалий математика муаммолари · 2024-07-19
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…
- Numerical calculation of turbulent flow in a channel with an obstacle based on COMSOL Multiphysics
Malikov, Z.M., Nazarov, F.Kh., Abdukhamdov, S.K., Маликов, З.М., Назаров, Ф.Х., Абдухамидов, С.К. · Ҳисоблаш ва амалий математика муаммолари · 2024-07-19
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…
- Lagrangian model for dispersed phase motion in the turbulent atmosphere
Ravshanov, N., Akhmedov, D., Ubaydullaev, M., Nasrullaev, P., Равшанов, Н., Ахмедов, Д., Убайдуллаев, М., Насруллаев, П. · Ҳисоблаш ва амалий математика муаммолари · 2024-07-19
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…
- METHODOLOGY FOR ASSESSING THE EXISTING LEVEL OF INFORMATION SECURITY OF THE EDUCATIONAL INFORMATION SYSTEM
Sulyukova, L.F., Yorkulov, B.A., Сулюкова, Л.Ф., Ёркулов, Б.А. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-22
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…
- MATHEMATICAL MODEL OF AUTOMATIC STOP WORDS DETECTION OF TEXTS IN THE UZBEK LANGUAGE
Madatov, Kh.A., Мадатов, Х.А. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-22
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…
- GENERATIVE AI FOR DE NOVO DRUG DESIGN: NEW CHALLENGES IN MOLECULE
Adilova, F.T., Davronov, R.R., Адылова, Ф.Т., Давронов, Р.Р. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-22
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…
- MATHEMATICAL MODELING OF THE PROCESS OF UNDERGROUND LEACHING TAKEN INTO ACCOUNT OF CHANGES IN THE HYDRODYNAMIC PARAMETERS OF THE POROUS MEDIUM
Ravshanov, N., Kholmatova, I.I., Kurbonov, N.M., Islamov, Yu.N., Равшанов, Н., Холматова, И.И., Курбонов, Н.М., Исламов, Ю.Н. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-22
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…
- MATHEMATICAL MODELING OF THE GAS FILTRATION PROCESS OF POROSITY CHANGES DEPENDING ON PRESSURE
Nazirova, E., Nematov, A., Ismailov, Sh., Artikbaeva, G., Назирова, Э.Ш., Неъматов, А., Исмаилов, Ш., Артикбаева, Г. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-22
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…
- MODELING OF AEROSOL PARTICLES DISPERSION IN THE ATMOSPHERIC BOUNDARY LAYER, CONSIDERING THE FACTORS OF ABSORPTION AND CAPTURING BY VEGETATIVE COVER
Ravshanov, N., Tashtemirova, N., Karshiev, D.A., Равшанов, Н., Таштемирова, Н., Каршиев, Д.А. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-22
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…
- MATHEMATICAL MODELING OF THE DEFORMED STATE PROCESSES OF MESH PLATES WITH A COMPLEX SHAPE
Nuraliev, F.M., Sultanov, B.J., Dauytova, J.K., Нуралиев, Ф.М., Султанов, Б.Ж., Дауытова, Ж.К. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-22
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…
- NEW MODEL STRAINS EQUATIONS FOR ANISOTROPIC BODIES
Khaldjigitov, A.A., Adambaev, U.E., Djumayozov, U.Z., Khasanova, Z.Z., Халджигитов, А.А., Адамбаев, У.Э., Джумаёзов, У.З., Хасанова, З.З. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-22
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…
- SOME ASPECTS OF NUMERICAL ANALYSIS OF THE FRACTIONAL MATHEMATICAL MCSHERRY MODEL FOR DESCRIBING AN ARTIFICIAL ECG
Alimov, Kh.T., Parovik, R.I., Алимов, Х.Т., Паровик, Р.И. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-22
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…
- APPROXIMATE SOLUTION OF LINEAR FREDHOLM INTEGRAL EQUATIONS OF THE SECOND KIND BY THE METHOD OPTIMAL QUADRATURES
Shadimetov, Kh.M., Usmanov, Kh.I., Шадиметов, Х.М., Усманов, Х.И. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-21
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…
- STUDY OF EXPONENTIAL STABILITY OF A NUMERICAL SOLUTION OF A HYPERBOLIC SYSTEM WITH NEGATIVE NONLOCAL CHARACTERISTIC VELOCITIES AND MEASUREMENT ERROR
Aloev, R.D., Berdyshev, A., Alimova, V., Алоев, Р.Д., Бердышев, А., Алимова, В. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-21
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…
- NUMERICAL SIMULATION OF NONLINEAR PROBLEMS OF DYNAMICS OF VISCOELASTIC SYSTEMS WITH FINITE NUMBERS OF DEGREES OF FREEDOM
Yusupov, M., Karshiev, D.K., Sharipova, U.B., Юсупов, М., Каршиев, Д.К., Шарипова, У.Б. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-21
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…
- NUMERICAL MODEL AND COMPUTATIONAL ALGORITHM FOR SOLVING THE PROBLEM OF FILTRATION OF UNCONFINED GROUNDWATER
Nazirova, E., Shukurova, M., Назирова, Э., Шукурова, М. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-21
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…
- PARALLEL ALGORITHM FOR IDENTIFICATION OF PARAMETERS OF THE MODEL OF SUSPENSION FILTRATION IN A POROUS MEDIUM
Khuzhayorov, B.Kh., Fayziev, B.M., Kholiyarov, E.Ch., Хужаёров, Б.Х., Файзиев, Б.М., Холияров, Э.Ч. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-21
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…
- MATHEMATICAL MODEL OF TWO-PHASE FILTRATION IN A POROUS MEDIUM TAKEN INTO ACCOUNT OF ITS DEFORMATION
Burnashev, V.F., Kaytarov, Z.D., Бурнашев, В.Ф., Кайтаров, З.Д. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-21
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…
- NUMERICAL MODELING OF 3D WIND VELOCITY FIELD IN THE ATMOSPHERE
Muradov, F.A., Tashtemirova, N.N., Eshboeva, N.F., Goziev, Kh.I., Мурадов, Ф.А., Таштемирова, Н.Н., Эшбоева, Н.Ф., Гозиев, Х.И. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-21
As it is known the distribution of harmful substances in the atmosphere directly depends on the wind speed. This paper considers the problem of hydrodynamics in the form of nonlinear partial differential equations of…
- SIMPLE LAGRANGIAN MODEL OF RADIOACTIVE PARTICLES DISPERSION IN THE ATMOSPHERE
Akhmedov, D.D., Ubaydullaev, M.Sh., Nasrullaev, P.A., Ахмедов, Д.Д., Убайдуллаев, М.Ш., Насруллаев, П.А. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-21
The study of atmospheric pollutant transport and diffusion processes remains a vital scientific issue and a field of interest for many researchers. Mathematical modeling is often the most effective means for uncovering…
- NUMERICAL MODELING OF TURBULENT FLOWANDAIR POLLUTANT DISPERSION IN URBAN STREET CANYONS
Ravshanov, N., Boborakhimov, B.I., Juraboeva, O.S., Равшанов, Н., Боборахимов, Б.И., Журабоева, О.С. · Ҳисоблаш ва амалий математика муаммолари · 2024-05-21
Large cities often face challenges in providing an eco-friendly living space. This is crucial in residential areas where the majority resides, aiming for high social and envi ronmental comfort. Key pollution sources…
- KAPITAL BOZORI ORQALI MAMLAKAT IQTISODIYOTIGA INVESTITSIYA JALB QILISHNING AQSH TAJRIBASI
Holov , Sherali · Яшил иқтисодиёт ва тараққиёт · 2024-11-11
Tadqiqotda mahalliy va xorijiy olimlarning mavzuga doir ilmiy ishlari hamda moliya bozorining joriy holati tahlilqilingan. Moliya bozori instrumentlari orqali moliyalashtirish davlat va korporativ siyosatning kompleks…
- Innovatsion iqtisodiyotda moliya tizimini qo‘llab-quvvatlashning ustivor yo‘nalishlari.
Baxriddinov , Nodirbek · Яшил иқтисодиёт ва тараққиёт · 2024-12-07
Maqolada innovatsion iqtisodiyot sharoitida moliya tizimini qo‘llab-quvvatlashning asosiy yo‘nalishlaribatafsil yoritib berilgan. Shuningdek, O‘zbekiston budjeti ko‘rsatkichlari diagrammalar orqali keltirilgan…
- Iqtisodiyotida innovatsion faoliyatni moliyaviy rag‘batlantirish vositalari
Baxriddinov , Nodirbek · Яшил иқтисодиёт ва тараққиёт · 2024-11-07
Maqolada sanoat korxonalarining innovatsion faoliyatini moliyaviy ragʻbatlantirish vositalari koʻrib chiqilganva tahlil qilingan. Mazkur masala boʻyicha turli xil vositalar oʻrganilgan hamda ularni sanoat korxonalarida…
- O‘ZBEKISTONDA “YASHIL” IQTISODIYOTGA O‘TISH STRATEGIYASINING INVESTITSION MEXANIZMLARI VA ULARNING SAMARADORLIGI
Otaboyev , Axmed, Raxmatullayev , Sardor · Яшил иқтисодиёт ва тараққиёт · 2024-10-17
Mazkur ilmiy tezisda O‘zbekistonda “yashil” iqtisodiyotga o‘tish strategiyasi doirasida qo‘llanilayotganinvestitsion mexanizmlar va ularning samaradorligi tahlil qilinadi. Tadqiqotda davlat investitsiyalari…
- Hududlar daromad salohiyatini oshirishda soliq siyosatining o‘rni
Qobulov , Xotamjon · Яшил иқтисодиёт ва тараққиёт · 2024-09-07
Ushbu maqolada hududlar daromad salohiyatini oshirishda soliq siyosatining o‘rni, uning iqtisodiy rivojlanishjarayonlariga ta’siri va samaradorlik mexanizmlari yoritilgan. Tadqiqotda hududlarning iqtisodiy holati, soliq…
- O‘zbekiston Respublikasi mintaqalarida sanoat korxonalari barqaror rivojlanishining xozirgi kundagi xolati tahlili
Sadriddinov, Baxtiyor · Яшил иқтисодиёт ва тараққиёт · 2024-11-07
Ushbu maqolada raqamli iqtisodiyot sharoitida sanoatni innovasion rivojlantirish asosida mamlakatdabarqaror iqtisodiy o‘sishni ta’minlashning asoslab berilgan. O‘zbekiston Respublikasida mintaqaviy sanoat…
- O‘ZBEKISTONDA DYUZDO SPORTI BO‘YICHA YUQORI MALAKALI SPORTCHILARNI SHAKLLANTIRISHDA TAKTIK TAYYORGARLIK TIZIMINI TAKOMILLASHTIRISH YO‘NALISHLARI
Tangriyev , Abdullo · Яшил иқтисодиёт ва тараққиёт · 2024-10-17
Ushbu maqolada O‘zbekistonda dyuzdo sporti bo‘yicha yuqori malakali sportchilarni shakllantirishdataktik tayyorgarlik tizimini takomillashtirishning ilmiy va amaliy asoslari tahlil qilingan. Tadqiqotda sportchilarning…
- QAYTA TIKLANUVCHI ENERGIYA RESURSLARINI MOLIYALASHTIRISHGA OID LOYIHALARINI AMALGA OSHIRISH VA ULARNING STATISTIKASI
Yoqubboyev , Ilhomjon · Яшил иқтисодиёт ва тараққиёт · 2024-10-17
Mazkur maqolada 2022-2026-yillarga mo‘ljallangan Yangi O‘zbekistonning taraqqiyot strategiyasidabelgilangan vazifalarni amalga oshirish, O‘zbekiston Respublikasining “yashil” iqtisodiyotga o‘tish strategiyasi…