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Mathematics: Недавние поступления

  • WEAK GROTHENDIECK COMPACTNESS PRINCIPLE FOR SYMMETRIC SPACES 
    MATIN, DAUREN; NESSIPBAYEV, YERLAN; SUKOCHEV, FEDOR; ZANIN, DMITRIY (PACIFIC JOURNAL OF MATHEMATICS, 2024)
    We strengthen and simplify the weak Grothendieck compactness principle for symmetric sequence spaces, and extend it to both symmetric function spaces and noncommutative symmetric spaces of measurable operators.
  • ULYANOV INEQUALITIES FOR THE MIXED MODULI OF SMOOTHNESS IN MIXED METRICS 
    Simonov, B.V.; Jumabayeva, A.A. (Georgian Mathematical Journal, 2024)
    In this paper, mixed moduli of smoothness of functions of two variables are studied. We prove Ulyanov-type inequalities between mixed moduli of smoothness of positive orders in different metrics. Estimates for the mixed ...
  • Towards robust security in WSN: a comprehensive analytical review and future research directions 
    Zhukabayeva, Tamara; Zholshiyeva, Lazzat; Ven-Tsen, Khu; Mardenov, Yerik; Adamova, Aigul; Karabayev, Nurdaulet; Abdildayeva, Assel; Baumuratova, Dilaram (Indonesian Journal of Electrical Engineering and Computer Science, 2024)
    One of the most important aspects of the effective functioning of wireless sensor network (WSN) is their security. Despite significant progress in WSN security, there are still several unresolved issues. Many review ...
  • The Approximation of Functions of Several Variables with Bounded p-Fluctuation by Polynomials in the Walsh System 
    Akhazhanov, Talgat; Matin, Dauren; Baituyakova, Zhuldyz (Mathematics, 2024)
    This paper presents direct and inverse theorems concerning the approximation of functions of several variables with bounded p-fluctuation using Walsh polynomials. These theorems provide estimates for the best approximation ...
  • Targeted Attacks Detection and Security Intruders Identification in the Cyber Space 
    Avkurova, Zhadyra; Gnatyuk, Sergiy; Abduraimova, Bayan; Makulov, Kaiyrbek (Computer Network and Information Security, 2024)
    The number of new cybersecurity threats and opportunities is increasing over time, as well as the amount of information that is generated, processed, stored and transmitted using ICTs. Particularly sensitive are the ...
  • System of Interconnected Reactor Models of the Sulfur Recovery Unit with Hydrogen Extraction for Hydrogen Energy in a Fuzzy Environment 
    Orazbayev, Batyr; Orazbayeva, Kulman; Dyussekeyev, Kanagat; Turymbetov, Tursinbay; Yessirkessinov, Ramazan; Zhumadillayeva, Ainur (Energies, 2025)
    The Sulfur Production Unit with Hydrogen Extraction (SPUHE) plays a critical role in oil refineries by converting hydrogen sulfide into high-quality sulfur and hydrogen. However, optimizing SPUHE operations is challenging ...
  • Study of the Effect of Nanostructured Grains on the Radiation Resistance of Zirconium Dioxide Ceramics During Gas Swelling in the Case of High-Dose Irradiation with He2+ Ions 
    Kozlovskiy, Artem L.; Konuhova, Marina; Shlimas, Dmitriy I.; Borgekov, Daryn B.; Zdorovets, Maxim V.; Shakirziyanov, Rafael I.; Garanin, Yuriy A.; Volodina, Natalia O.; Popov, Anatoli I. (ES Materials and Manufacturing, 2024)
    The paper is devoted to the study of the influence of variation of ZrO2 ceramics grain sizes on the resistance to radiationinduced swelling under irradiation with low-energy Не2+ ions. The choice of ZrO2 ceramics as objects ...
  • SPEAKER RECOGNITION BY ULTRASHORT UTTERANCES 
    Medetov, B.; Nurlankyzy, A.; Namazbayev, T.; Akhmediyarova, A.; Zhetpisbayev, K.; Zhetpisbayeva, A.; Kargulova, A. (Eastern-European Journal of Enterprise Technologies, 2025)
    The object of this study is the accuracy of announcer identification based on short utterances. To solve the task of speaker identification based on ultrashort speech utterances, a phoneme-by-phoneme approach to ...
  • Some free boundary problem arising in rock mechanics 
    MEIRMANOV, ANVARBEK; YERZHANOV, KOBLANDY (Turkish Journal of Mathematics, 2024)
    An initial boundary value problem for the in situ leaching is considered. We describe physical processes at the microscopic level with a pore size ε ≪ 1 by model A ε , where dynamics of the incompressible solid skeleton ...
  • Results of Experimental Research on Microflame Burners for Hot Water Boilers and Gas Turbines 
    Beloev, Hristo I.; Dostiyarov, Abay M.; Sarakeshova, Nurbubi N.; Makzumova, Ainura K.; Iliev, Iliya K. (Energies, 2024)
    The study aims to address the need for cleaner and more efficient combustion technologies in the context of global energy demand and sustainability goals. It focuses on microflame techniques to enhance the performance ...
  • RECONSTRUCTION THE DOMAIN OF DEFINITION OF SOME DIFFERENTIAL OPERATOR ON A DIRECTED GRAPH 
    Kairatkyzy, A.; Zhapsarbayeva, L.; Tleulessova, A.; Kabdrakhova, S.; Burgumbayeva, S. (JMMCS, 2024)
    In this work it is proposed to study differential operators on a graph as an operator composed of differential operators on one-dimensional arcs and matrix operators on interior vertices of the graph. The work explores ...
  • Quaternion Fractional Fourier Transform: Bridging Signal Processing and Probability Theory 
    Samad, Muhammad Adnan; Xia, Yuanqing; Siddiqui, Saima; Bhat, Muhammad Younus; Urynbassarova, Didar; Urynbassarova, Altyn (Mathematics, 2025)
    The one-dimensional quaternion fractional Fourier transform (1DQFRFT) introduces a fractional-order parameter that extends traditional Fourier transform techniques, providing new insights into the analysis of quaternion-valued ...
  • Proton beam energy calibration of the 3 MV Tandetron™ at IFIN-HH 
    Testov, D.A.; Straticiuc, M.; Söderström, P.-A.; Aogaki, S.; Andrei, R.-F.; Azhibekov, A.K.; Balabanski, D.L.; Ban, S-R.; Brezeanu, M.; Burducea, I.; Constantin, P.; Dhal, A.; Djourelov, N.; Florea, N.; Gavrilescu, A.; Guardo, L.; Iancu, D.; Ioannidis, S.; Kahl, D.; Kuncser, I.; Kurmanaliyev, Zh.; Kusoglu, A.; Lorusso, G.; Mauyey, B.; Morzabayev, A.; Nedelcu, C.V.; Nichita, D.; Niculae, S.; Parlea, P.; Paun, C.; Petruse, T.; Rotaru, A.; Roy, R.; Spataru, A.; State, A.N.; Toma, V.; Tozar, T.; Vasilca, V. (Published by IOP Publishing for Sissa Medialab, 2025)
    The ELIGANT-TN long neutron counter, the ELISSA silicon strip array and the Mini-eTPC active gas target detector all represent nuclear physics research tools constructed at Extreme Light Infrastructure - Nuclear Physics ...
  • Pre-Compact Sets in the Generalized Morrey Spaces in Terms of the Averaging Function 
    Akhazhanov, Talgat; Turgumbayev, Mendybay; Matin, Dauren; Kenzhebekova, Gulmira; Imanbetova, Akpeiil; Bozhayeva, Altynay (Contemporary Mathematics, 2025)
    In this paper, sufficient conditions for compactness of sets in generalized Morrey spaces are given in terms of an averaging function. This result is analogous to the well-known Fréchet-Kolmogorov theorem for the ...
  • Pre-Compactness of Sets and Compactness of Commutators for Riesz Potential in Global Morrey-Type Spaces 
    Bokayev, Nurzhan; Burenkov, Victor; Matin, Dauren; Adilkhanov, Aidos (Mathematics, 2024)
    In this paper, we establish sufficient conditions for the pre-compactness of sets in the global Morrey-type spaces 𝐺⁡𝑀𝑤⁡(·) 𝑝⁢𝜃. Our main result is the compactness of the commutators of the Riesz potential [𝑏,𝐼𝛼] ...
  • Optimizing Waste Motor Oil Recycling into Diesel Using Novel Deep Eutectic Solvents: An Atomistic Study 
    Nurmanova, Sagynysh; Kolisnichenko, Sergey; Kokayev, Umirzhan; Kalmanova, Dinara; Karazhanov, Abdikarim; Alipbayev, Zhassulan; Abuova, Fatima; Abdirashev, Omirzak; Satanova, Balzhan (ES Materials and Manufacturing, 2025)
    The optimization of recycling processes for waste motor oil (WMO) into diesel fuel is crucial for sustainable waste management and resource recovery. This study explores the application of novel deep eutectic solvents ...
  • OPTIMAL CONTROL FOR FUNCTIONAL-DIFFERENTIAL EQUATION OF NEUTRAL TYPE IN BANACH SPACES 
    Perehuda, O. V.; Stanzhytskiy, O. M.; Klimchuk, T. V.; Ospanov, M. N. (JOURNAL OF OPTIMIZATION, DIFFERENTIAL EQUATIONS AND THEIR APPLICATIONS (JODEA), 2025)
    This paper examines an optimal control problem for a class of neutral-type functional-differential equations in Banach spaces, where the control objective relates to the boundary of the domain. Sufficient conditions on ...
  • ON UNIQUENESS AND CONTINUOUS DEPENDENCE OF THE WEAK SOLUTIONS OF NEUTRAL STOCHASTIC FUNCTIONAL DIFFERENTIAL EQUATIONS IN INFINITE DIMENSIONAL SPACES 
    Khaletska, Z. P.; Ospanov, M. N; Perestyuk, Y. M.; Pravdyvyi, O. A. (JOURNAL OF OPTIMIZATION, DIFFERENTIAL EQUATIONS AND THEIR APPLICATIONS (JODEA), 2024)
    In this paper we establish uniqueness of the weak solutions of nonlinear stochastic functional differential equations of neutral type in Hilbert spaces. We also study the continuous dependence of such solutions on the ...
  • ONTOLOGY MODELING FOR AUTOMATION OF QUESTIONNAIRE DATA PROCESSING 
    Iklassova, K.; Aitymova, A.; Kopnova, O.; Shaporeva, A.; Abildinova, G.; Nurbekova, Z.; Almagambetova, L.; Gorokhov, A.; Aitymov, Z. (Eastern-European Journal of Enterprise Technologies, 2024)
    The object of this study is the analysis of questionnaire data using ontological modeling. The task relates to the fact that conventional methods for processing questionnaire data are often insufficiently effective ...
  • ON THE CORRECTNESS OF ONE CLASS OF FOURTH-ORDER SINGULAR DIFFERENTIAL EQUATIONS 
    Moldagali, Ye.O.; Ospanov, K.N. (JMMCS, 2024)
    The differential equation of fourth-order with variable smooth coefficients, given on the real axis, is investigated. The coefficients of the equation can be unbounded, and the sign of the potential (the lowest coefficient) ...

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