Actual problems of Mathematics, Physics and Mecanics
Actual problems in modern technical sciences
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Actual problems in modern technical sciences
FINAL DEOXIDATION OF COPPER AND BRONZE ALLOYS
This article discusses the processes of final deoxidation of copper and bronze alloys and their reaction mechanisms. The role of deoxidizers such as phosphorus, aluminum, and manganese, their effectiveness in reducing oxides in the metal, and the development of technological processes are...
3 August 2025, 21:50
CAUSES AND EFFECTS OF WEAR IN MILL AND PUMP COMPONENTS AND METHODS TO IMPROVE THEIR WEAR RESISTANCE
This article examines the causes and consequences of wear occurring in the internal parts of mills and pumps, which are widely used in industrial processes, as well as modern methods for increasing durability. The influence of mechanical, chemical, and thermal factors is highlighted, and the...
3 August 2025, 21:50
DEVELOPMENT OF MODERN TECHNOLOGY FOR OBTAINING VOLFRAM VI OXIDE POWDER JSC “UZBEKISTAN TECHNOLOGICAL METALS COMBINATE”
This article highlights the scientific and practical research conducted at the “Uzbekistan Metallurgical Technology Plant” JSC on the modern technology for producing tungsten VI oxide powder. The research investigated the possibilities of hydrometallurgical processing of tungsten cakes separated...
3 August 2025, 21:50
CORRELATING PHASE, MORPHOLOGY, AND STOICHIOMETRY OF OXYGEN ANNEALING FOR CRYSTALLINE VO₂ THIN FILMS
This study investigates the effects of annealing atmosphere (air vs. oxygen) and temperature on the properties of RF-sputtered VO2 thin films. XRD analysis revealed that annealing in an oxygen atmosphere preferentially enhances the formation of the monoclinic VO2 phase over V2O5 and reduces the...
3 August 2025, 21:50
ANNEALING-INDUCED PHASE EVOLUTION AND MORPHOLOGICAL CONTROL IN RF-SPUTTERED VO2 THIN FILMS
This study investigates the influence of annealing temperature (200–500 °C) and atmosphere (air vs. oxygen) on the properties of VO2 thin films deposited by RF magnetron sputtering. XRD analysis revealed a mixed-phase composition (VO2/V2O5), with oxygen annealing promoting preferential VO2growth at...
3 July 2025, 21:50
STATISTICAL WORD IMPORTANCE MODELING FOR UZBEK TEXT SUMMARIZATION: A TF-IDF-BASED APPROACH WITH IMPROVED SENTENCE SELECTION
Summarization is a central activity in the field of Natural Language Processing that makes it possible to extract essential information from a massive amount of text with minimal preservation of key meaning. But in the case of the Uzbek language, summarization is a weak field because it is an...
3 July 2025, 21:50
DESIGN AND IMPLEMENTATION OF A MODEL AND ALGORITHM FOR PART-OF-SPEECH TAGGING IN UZBEK TEXTS USING THE CONDITIONAL RANDOM FIELDS (CRFs) APPROACH
This paper presents a part-of-speech tagging system for the Uzbek language based on the Conditional Random Fields (CRF) approach. Using a manually annotated corpus and a set of language-specific morphological and contextual features, the model was trained and evaluated through 5-fold...
3 July 2025, 21:50
SYNTHESIS AND SURFACE MORPHOLOGY STUDY OF VANADIUM OXIDE THIN FILMS
Vanadium oxide (VOx) thin films were synthesized using DC magnetron sputtering with a vanadium target prepared by spark plasma sintering (SPS) at 900 °C under Ar+H2 atmosphere. Amorphous VOx films were deposited on glass substrates and annealed in air and oxygen atmospheres at 200–500 °C to study...
3 July 2025, 21:50
INCREASING THE EFFICIENCY OF SOLAR PANELS USING A MICROCONTROLLER
This article discusses how to increase the efficiency of solar panels using microcontrollers. During the research, an innovative method of using sensors, microcontrollers and automatic control systems was proposed to increase the efficiency of solar panels....
3 June 2025, 21:50
SUMMARIZATION AND KEYWORD EXTRACTION OF UZBEK TEXTS USING STATISTICAL AND NEURAL METHODS
This paper investigates statistical and neural approaches for automatic text summarization and keyword extraction in the Uzbek language. Traditional techniques like TF-IDF and Non-negative Matrix Factorization (NMF) are applied for identifying key terms and latent topics. Additionally, deep...
3 June 2025, 21:50