OAK jurnallaridan yig‘ilgan 140147 ta ilmiy maqola: sarlavha, mualliflar, annotatsiya, kalit so‘zlar, DOI va tayyor iqtibos formatlari.
- Second order hardy inequality under periodic and anti-periodic conditions
K. Kuliev, R. Tilavov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
In this paper, we study the second-order Hardy inequality with the periodic and anti-periodic boundary conditions. We establish the corresponding necessary and sufficient conditions for the inequality to hold.
- Synthesis and structural characterization of the QUERCETIN–Mo³⁺ complex
S.E. Qosimov, Р.Р. Назмутдинов, N.Q. Mukhamadiev, A. N. Mukhamadiev, F.X. Khakimov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This article presents the synthesis, physicochemical characterization and structural analysis of a new complex compound based on quercetin (3,3',4',5,7-pentahydroxyflavone) and Mo³⁺ ions. The complex was synthesized in…
- Gravitational lensing effect in the bbmb spacetime
Sh. Karshiboev, B. Turimov, Z. Turakhonov, I. Norbutayeva, S. Samiyeva · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This manuscript draft summarizes the gravitational lensing effect in the Bocharova-Bronnikov-Melnikov-Bekenstein (BBMB) spacetime. The analysis includes the photon equations of motion, strong-field deflection…
- Structural and optical properties of SrTiO₃ perovskite nanoparticles as a function of synthesis conditions
Hayitova M. М., N.K.Muhammadiyev · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
In this study, SrTiO₃ perovskite nanoparticles were synthesized using the sol–gel method. Strontium nitrate (Sr(NO₃)₂) and titanium isopropoxide were employed as precursors in a 1:1 molar ratio, while dimethyl sulfoxide…
- Comprehensive assessment of the impact of the irrigation process on the reclamation state of geosystems
Sh. Mustafayeva · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This article provides a comprehensive assessment of the impact of irrigation on the state of reclamation of geological systems. The study analyzed processes such as soil salinization, rising groundwater levels…
- Synthesis and structural–morphological characterization of a superparamagnetic FE₃O₄/ALGNP nanocomposite as a basis for magnetically controlled sorbents for water purification
G. Abilkosimova, D. Aronbaev, Аронбаев С. · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This work presents the results of the synthesis and comprehensive investigation of superparamagnetic magnetite–alginate nanocomposites (Fe₃O₄/Alg) obtained by the method of co-precipitation followed by calcium-induced…
- Synthesis of nanostructured photocatalytic materials based on La-MODIFIED ZnO using sol-gel and sgai methods
Sh.N. Magdiev, A. M. Nasimov, Kh. Sh. Tashpulatov, D T Toshpulatov, Sh.E. Mirzayev, J.M. Khursandov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This study is devoted to the synthesis and comprehensive study of nanostructured photocatalytic materials based on lanthanum-modified zinc oxide prepared by sol-gel and sol-gel auto ignition (SGAI) methods. It was found…
- Study of the effect of Fe concentration on the optoelectronic properties and photocatalytic activity of ZnO nanostructures
Kh. Arzimurodova, N. Mukhamadiyev, H. Usmonova, J. Uzokov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
In this paper, the effect of iron (Fe) doping concentration on the morphology, optical and electronic properties, and photocatalytic activity of ZnO nanostructures is comprehensively studied. The results show a…
- Ecogeographic determinants of phytochemical variability in «Ziziphora clinopodioides»: a predictive framework for populations in Uzbekistan
N.Q. Mukhamdiyev, Mukhamadiyev A.N., Sh. M. Sayitkulov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
«Ziziphora clinopodioides» Lam. is a medicinally valuable aromatic plant distributed across Central Asia, including Uzbekistan's mountain regions (Samarkand, Kashkadarya, Zomin). Despite its traditional use, the…
- Numerical solution of suspension filtration through a radial filter under constant pressure
U. Saydullaev, N. Juraev · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This study presents a theoretical and numerical investigation of one-dimensional radial suspension filtration through a cylindrical filter medium under constant-pressure conditions. A mathematical model of the…
- Adaptive filtering and gradient optimization mechanisms for accurate identification of micro-object images
I. Jumanov, R. Safarov, O. Djumanov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
A methodology has been developed for optimizing the identification, recognition, and classification of micro-objects using redundant image information structures - histological, morphological, fractal, correlation, and…
- Finding the local parametric representation of a four-dimensional nonlinear algebraic system in the neighborhood of small singularities
A S Soleev, Sh. Kurdashov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This paper is devoted to the problem of finding a local parametric representation of solutions to a nonlinear algebraic system in the neighborhood of singular points. At points where the Jacobian matrix becomes…
- Improving the adsorption capacity of activated carbon derived from impregnated walnut shells toward organic and inorganic pollutants
D. Ergasheva, A. Mukhamadiyev, N. Mukhamadiyev, J. Uzokov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
Activated carbons were synthesized from walnut shells by pyrolysis and chemical activation, and their structural and adsorption properties were studied. BET analysis showed that the surface area increased from 285.4…
- Study of structural, morphological, electronic and magnetic properties of Fe3O4 and CoFe2O4 nanostructures obtained with the help of a natural stabilizer
G. (Gulchiroy) Fayziyeva, J. Uzokov, A. Mukhamadiyev, Kh. Usmonova, R. Begmatov, N. Mukhamadiyev · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
In this study, Fe₃O₄ and CoFe₂O₄ magnetic nanostructures were successfully synthesized by a modified coprecipitation method with the participation of a natural stabilizer, and their structural, electronic, and magnetic…
- Mixed problem for negative order mkdv–l equation with integral source
А. Abdivokhidov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
We consider the problem of finding a solution of the mixed problem for the negative order modified Korteweg-de Vries–Liouville equation with a self-consistent integral source using the inverse spectral problem for a…
- A cnn–transformer hybrid model for detecting and classifying brain tumors based on MRI images
D. T. Muhamediyeva, N.S. Mamatov, A.F. Isoqov, I.J. Juraev, Sh.E. Jovliboyev · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This paper examines the problem of automatically detecting and classifying brain tumors based on magnetic resonance imaging (MRI) of the brain. The study analyzes the existing shortcomings of traditional machine…
- Application of the inverse spectral problem to the hirota equation with an additional term and finite density
G. Mannonov, G. Farkhodova, Z. (Zulfiya) Mamedova · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This paper applies the inverse spectral problem method to integrate the Hirota equation with an additional term and a finite density within the class of periodic infinite-gap functions. The evolution of the spectral…
- Synthesis, structural characterization and optical properties of BaTiO₃-BASED perovskite materials
M. Baxranova, N. Mukhamadiyev, K.F. Khalilov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
BaTiO₃-based perovskite materials were synthesized and comprehensively characterized by energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), and UV–Vis absorption techniques. EDS…
- Andijan and osh agglomerations as a transboundary urbanisation system of the Fergana valley
A. Nizamiev, A. Isayev, N. Nurmatov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
The accelerating urbanization of the Fergana Valley has produced one of the densest settlement systems in Central Asia, yet the agglomerations that anchor this system are habitually examined within national borders, as…
- Radionuclides in soils and food products of certain regions of Uzbekistan
G O‘ Axmedova, U U Tuxtayev, M. Ernapasova, M. Fayzulloyeva · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This study investigates the specific activities of natural (226Ra, 232Th, 40K) and technogenic (137Cs) radionuclides in soils and food products from selected regions of Uzbekistan using scintillation gamma spectrometry…
- A comparative analysis of sugeno and mamdani fuzzy inference systems in veterinary
L. (Lola) Safarova, Z. Qudratova · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
Addressing the challenges of ambiguity in veterinary medicine, this study proposes a novel approach to cattle disease diagnosis using neutrosophic sets and the Sugeno fuzzy model. The research develops specialized…
- Voltammetric determination of sulfur-containing compounds in motor fuels using copper-modified screen-printed electrodes
M. I. Ravshanov, С.Д. Аронбаев, Д.М. Аронбаев · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
A direct electrochemical method for the determination of sulfur-containing compounds in motor fuels using copper-modified screen-printed electrodes (Cu-SPCE) and square-wave voltammetry has been developed. The electrode…
- Adsorption of hydrocarbon fragments ch, CH₂ and CH₃ on the surface of the fullerene C60 molecule
Kh.I. Jabborov, A.Kh. Rasulov, D.V. Alyabev · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
Modeling of the adsorption of CH, CH₂, and CH₃ fragments on fullerene C₆₀ was performed. Interatomic interactions were described using a hybrid potential scheme implemented in LAMMPS. The hydrocarbon fragment was…
- Modeling a secure communication system integrating quantum computing, cryptography, and blockchain technologies
D. T. Muhamediyeva, F.A. Tagayev · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This paper examines the problem of ensuring the security of information exchange based on the principles of quantum computing. Within the scope of the study, the stages of user authentication, secret-key generation via…
- Detection and correction of distorted images of medical objects based on convolutional neural networks
R. Safarov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
Scientific and methodological foundations for optimal identification, recognition, and classification of single-cell medical objects have been developed using hybrid convolutional neural networks with recurrent…
- Vibrations spectra and quantum-chemical calculations and various topological analyses to study interactions in ethyl acetoacetate-chloroform clusters
A. Jumabayev, A Absanov, L. Bulavin, Z. Ernazarov, U. (U) Jurayev, A. Safarov, A. Boliyev, M. Usmanov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
Raman spectra of pure ethyl acetoacetate were obtained at room temperature and atmospheric pressure. The experimental and computational Raman spectra were compared, and PED (Potential Energy Distribution) analyses were…
- Calculation and analysis of spectroscopic and isotopic parameters of the (CH₃)₂O···HF complex
U. Khujamov, R. Asfin, А.Болиев, M. Usmonov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
With a high spectral resolution of 0.1 cm⁻¹, the (CH3)2O···HF complex's gas phase infrared absorption spectra were recorded at temperatures between 188 in the 3200–3800 cm⁻¹ range, which corresponds to the HF stretching…
- Synthesis, x-ray structural, and quantum chemical study of a new [C8H3NO6]2−·(C2H10N2)2+ complex compound
N. Karimova, G. Muqumova, J. Suyunov, S. Rahmonberdiyeva · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
In this work, a new complex compound based on 4-nitroftalic acid and ethylenediamine of composition [C8H3NO6]2−·(C2H10N2)2+ was synthesized for the first time. The complex compound was grown from solution by slow…
- Montmorillonite and laponite: prospects of their intercalation and the development of adsorbents based on them
Z.R. Masharipova, A. Abdikamalova, A. Kenjaev, K. (Kudrat) Masharipov, M. Alieva, I. Mamodoliyev · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
The article considers montmorillonite and laponite as promising layered silicates for the development of adsorbents and functional materials. The interest in these materials is attributed to their unique structure…
- Integration of the equation composed of a combination of nonlinear KDV(+1) and KDV(-1) equations with an integral source
F. Ermamatova, G. Khasanov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
In this work, the inverse spectral problem method is applied to integrate an equation composed of a combination of nonlinear KdV(+1) and KdV(-1) equations with an integral source. An infinite system of Dubrovin…
- Preparation of mesophose silica supercapacitors based on natural surfactants and evaluation of their physicochemical properties
A. Vokhidov, J. Uzokov, A. Mukhamadiyev, N. Mukhamadiyev · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This study investigates the synthesis of mesoporous silica (SBA-15) using a natural surfactant, Geranyl acetate saponin, and its application as an organo–inorganic hybrid supercapacitor material after modification with…
- Study of the temperature dependence of scattering intensity in aqueous γ-PICOLINE solutions by the dynamic light scattering method
Л.М. Сабиров, Y.T. Juraev, G.N. Umarova, X.Sh. Omonov, X.Sh. Djumaniyazov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
The correlation function of coherent scattering was studied by the dynamic light scattering (DLS) method for aqueous γ-picoline solutions of low concentrations (mole fractions of 0.003 and 0.005) in the temperature…
- Spatial heterogeneity of raman scattering and surface morphology in Mn implanted silicon
E. Arzikulov, F. Salaxitdinov, Yujin Wang, 呂紹瑋, Teng Liu, Zhisheng Nong · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This study investigates the spatial heterogeneity of Raman scattering and surface morphology in n-type Si (100) single crystals subjected to manganese ion implantation. Implantation was performed at 40 keV with doses…
- Temperature dependence of the hall coefficient and electrical resistance of binary solid solutions in the Mo-Nb system
O K Quvandiqov, A. Granovskii, N. Hamraev, R. Razhabov, N. Hamraeva · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
The work is devoted to an experimental study of the temperature and concentration dependences of the Hall coefficient and electrical resistivity of double continuous solid solutions of the molybdenum-niobium system at…
- Influence of the crystallographic orientation of the monocrystalline substrate on the current–voltage characteristics of NI/SIO₂/N-SI structures
E. Arzikulov, T. Sharofova, 呂紹瑋, Teng Liu, Zhisheng Nong, S. Sattarov · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
In this article, the electrophysical properties of Ni/SiO₂/n-Si metal-oxide-semiconductor (MOS) structures formed on n-type monocrystalline silicon substrates in the [111], [110], and [100] crystallographic orientations…
- Critical thresholds and asymptotic behavior of weak solutions to nonlinear weighted coupled parabolic equations
A. U. Mamatov, I.O. Murodullayev · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This paper investigates the qualitative properties of weak solutions to a coupled system of nonlinear weighted parabolic equations featuring p-Laplacian diffusion and exponential reaction terms. By employing a…
- Enhancing the architecture of an insider threat detection system through file activity monitoring
F. Muxamadiyev · Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi · 2026-07-01
This paper proposes an improvement of a client-server architecture designed to detect insider threats by monitoring file operations of users working with documents in real time. The study considers actions such as file…
- DNKdagi kichik o‘zgarish – katta xavf: CHEK2 1100delC mutatsiyasining onkologik ahamiyati
Xudoyberdiyeva Nilufar V, Boboyev Qodirjon T · Қўқон ДПИ. Илмий хабарлар · 2026-07-01
Ko‘pgina tadqiqotlar onkosupressor Chek2 genining 1100delC(rs555607708) polimorfizmi va ko‘krak bezi saratoni (KBS) rivojlanishi o‘rtasidagibog‘liqlik mavjudligini tasdiqladi. Tadqiqotda 1100delC variantining o‘zbek…
- Углеродли сорбентда водород сульфид адсорбциясининг гибсс энергияси ва иссиқлик мувозанат вақти
Жумаева Дилноза Жўраевна, Бахронов Ҳаёт Нурович, Коххаров Мирзохид Хусанбоевич, Жумабоева Зебо Зиёдуллаевна, Султонов Амирхон Усубжон ўғли, Эсонқулова Назирахон Махмудовна · Қўқон ДПИ. Илмий хабарлар · 2026-07-01
Мазкур мақолада Павлония-Томентоза гибрид навли дарахтидан фаоллаштириган углеродли адсорбентида водород сульфид молекулаларининг 303 К ҳароратдаги адсорбциясининг Гибсс озод энергияси ва иссиқлик мувозанат вақти…
- Xalq ertaklarida an’anaviy formulalarining o‘ziga xosligi
Esonov Rustam Raxmonali o‘g‘li · Қўқон ДПИ. Илмий хабарлар · 2026-07-01
Ushbu turdagi folklor asarining janr xususiyatlari faqat ertaklarga xos bo‘lgan ma’lum bir tarkibiy, kompozitsion va lingvistik shaklning mavjudligini nazarda tutadi, shuning uchun an’anaviy formulalarning paydo…
- Til, madaniyat va folklorning o‘zaro ta’sir jihatlari
R.R.Esonov · Қўқон ДПИ. Илмий хабарлар · 2026-07-01
Ushbu maqolada til, xalq og‘zaki ijodi va madaniyat o‘rtasidagi o‘zaro bog‘liqlik, fraqli jihatlari, umumiy xususiyatlari yoritilgan.
- Aholi ish bilan bandligi tarkibidagi o‘zgarishlar va ularning daromad solig‘i tushumlariga ta’siri tahlili
Sabirov Mirza Qilichbayevich · Актуар молия ва бухгалтерия ҳисоби · 2026-07-01
Mazkur maqolada aholi ish bilan bandligi tarkibidagi o‘zgarishlarning daromad solig‘i tushumlariga ta’siri tahlil qilingan. Unda rasmiy va norasmiy bandlik, yollanma mehnat, o‘zini o‘zi band qilish, xizmat ko‘rsatish…
- Agrotadbirkorlik subyektlarini iqtisodiy zonalar bo‘yicha rivojlantirish yo‘nalishlari
A. B. Qurbonov · Муҳандислик ва Иқтисодиёт · 2026-07-01
Maqolada Janubiy iqtisodiy rayon — Qashqadaryo va Surxondaryo viloyatlarida qishloq xo‘jaligi mahsulotlariishlab chiqarishda fermer xo‘jaliklari, dehqon xo‘jaliklari va boshqa toifa xo‘jaliklarining ulushi yillar…
- Resurs tejamkor texnologiyalardan foydalanish asosida kichik biznes korxonalarining raqobatbardoshligini oshirish yo‘llari
Sattorov , Sardor · Муҳандислик ва Иқтисодиёт · 2026-07-01
Mazkur maqolada resurs tejamkor texnologiyalardan foydalanish asosida kichik biznes korxonalari raqobatbardoshliginioshirish masalalari tadqiq etilgan. Bugungi kunda xomashyo va energiya resurslaridan samarali…
- Ishlab chiqarish korxonalarida moliyaviy hisobot auditini riskka asoslangan yondashuv asosida tashkil etish va metodologiyasini takomillashtirish
Karamatova , Noiba · Муҳандислик ва Иқтисодиёт · 2026-07-01
Ushbu maqolada ishlab chiqarish korxonalarida moliyaviy hisobot auditini takomillashtirishning tashkiliy-uslubiy jihatlari tadqiq etilgan. Tadqiqotda ishlab chiqarish korxonalarining moliyaviy hisobotlarini tekshirishda…
- Aksiyadorlik jamiyatlarida investitsiya loyihalarini moliyalashtirishda “Kapital majburiyatlar — likvidlik — erkin pul oqimi” muvozanatini ta’minlash modeli
Jumaniyazova , Feruza · Муҳандислик ва Иқтисодиёт · 2026-07-01
Maqolada aksiyadorlik jamiyatlarida investitsiya loyihalarini moliyalashtirishda «kapital majburiyatlar —likvidlik — erkin pul oqimi» muvozanatini ta’minlash modeli taklif etilgan. Model operatsion faoliyatdan sof pul…
- Angren va yangi angren ieslarining kul-shlak ag‘darmalarining to‘planish hajmlarini tahlil qilish
Almatov, Ilxomjon, Xatamov , G‘ayrat, Xamidullayev, Baxrom, Jabborov , Ergash · Муҳандислик ва Иқтисодиёт · 2026-07-01
Ushbu maqolada Angren va Yangi Angren issiqlik elektr stansiyalarining (IES) ko‘p yillik faoliyati davomidahosil bo‘lgan kul-shlak ag‘darmalarining (KSHA) to‘planish hajmlari global tendensiyalar bilan uzviy…
- Raqamli iqtisodiyot sharoitida innovatsion bank xizmatlari
D. M. Kallibekov · Муҳандислик ва Иқтисодиёт · 2026-07-01
This article examines the theoretical and practical aspects of developing innovative banking services in thecontext of the digital economy. It analyzes the impact of digital technologies, artificial intelligence…
- Banklarda sun’iy intellektdan foydalanish: afzalliklari va kamchiliklari hamda xorij tajribalari tahlili
Erkinova, Feruza · Муҳандислик ва Иқтисодиёт · 2026-07-01
Ushbu maqolada bank tizimida sun’iy intellekt (SI) texnologiyalarini joriy etishning nazariy va amaliy jihatlarihamda ularning afzalliklari va kamchiliklari tahlil qilingan. Sun’iy intellektning kredit risklarini…
- Jismoniy shaxslar tomonidan olib kiriladigan tovarlarga bojsiz olib kirish normasini qo‘llash va bojxona to‘lovlarini undirishni takomillashtirish
Nomozov , Abduvohid · Муҳандислик ва Иқтисодиёт · 2026-07-01
Maqolada jismoniy shaxslar tomonidan notijorat maqsadlarda olib kiriladigan tovarlarga bojsiz olib kirishnormasini qo‘llash va normadan ortiq qism uchun bojxona to‘lovlarini undirish amaliyoti tadqiq qilingan…