Actual problems of Mathematics, Physics and Mecanics
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COMPARATIVE ASSESSMENT OF TECHNOLOGIES FOR THICKENING GOLD-BEARING FLOTATION CONCENTRATES AND RECOVERING CLARIFIED PROCESS WATER: A LITERATURE REVIEW
This article presents a comparative literature review of technologies for thickening gold-bearing flotation concentrates and recovering clarified process water. The approaches examined include conventional and high-rate thickening, optimisation of flocculation conditions and feedwell hydrodynamics,...
3 August 2026, 22:03
CURRENT STATUS AND FUTURE PROSPECTS OF TECHNICAL-GRADE SELENIUM PURIFICATION TECHNOLOGIES: A CRITICAL REVIEW
This review examines the current status and future prospects of technical-grade selenium purification technologies based on published scientific literature. The physicochemical principles and technological capabilities of vacuum distillation, fractional crystallization, zone refining, and combined...
3 August 2026, 22:02
ENHANCING ATTENTION IN TRANSFORMER ENCODERS FOR AGGLUTINATIVE LANGUAGES THROUGH MORPHOLOGICAL QKV: THE MORPH-QKV MODEL FOR UZBEK
Agglutinative languages encode a substantial part of grammatical relations through ordered affix sequences attached to lexical stems. Encoders in the BERT family can learn some of these regularities implicitly from large corpora, but conventional self-attention does not treat lemma, stem/root, part...
3 August 2026, 22:01
HYDROMETALLURGICAL EXTRACTION OF MARGANESE FROM LOW AND MIDDLE-SIZE MARGANESE ORES
In Uzbekistan, a significant portion of manganese ores is of low and medium composition and is distributed across the Dautash, Kyzylbayrak, Takhtakarachin, Alisai, and Karatau regions. Existing geological data indicate that Dautash and Kyzylbayrak are volcanogenic-sedimentary, while Alisai belongs...
3 July 2026, 22:06
WORLD PRACTICE AND MODERN TECHNOLOGICAL APPROACHES TO EXTRACTING MARGANES FROM MARGANES-CONTAINING RAW MATERIALS
This review article analyzes global practices for extracting manganese from manganese-containing ores, ferroalloy dust, electrolytic manganese residues, and battery raw materials. Pyrometallurgy, sulfate hydrometallurgy, reduction smelting with oxalate and other organic reducing agents, reduction...
3 July 2026, 22:05
TECHNICAL AND ECONOMIC EFFECTIVENESS OF AN INTELLIGENT DE-ICING SYSTEM ON THE ZARAFSHAN-MURUNTAU 220 kV OVERHEAD LINE
This article assesses the technical and economic effectiveness of an intelligent monitoring and high-frequency de-icing system implemented for the Zarafshan-Muruntau 220 kV overhead transmission corridor. The assessment combines operational interruption data, energy not supplied, incident-recovery...
3 July 2026, 22:04
EXPERIMENTAL VALIDATION OF A 3-5 kHZ ELECTROTHERMAL DEICING MODEL FOR AC-240/39 OVERHEAD-LINE CONDUCTORS
This article evaluates a 3-5 kHz electrothermal method for removing ice from AC-240/39 overhead-line conductors and validates the corresponding transient model against experimental data. The approach applies a frequency- dependent current through a coupling and filtering subsystem so that heat is...
3 July 2026, 22:03
THE EFFECT OF GRID BAR GRATE PARAMETERS ON COTTON FLOW DYNAMICS AND THE EFFICIENCY OF LARGE IMPURITY SEPARATION
This paper presents a theoretical investigation of the dynamics of a cotton tuft moving between a saw-toothed drum and a grid bar grate, as well as the process of large impurity separation. Analytical equations describing the velocity and travel distance of the cotton tuft along the surface of the...
3 June 2026, 22:06
STATUS AND PROSPECTS OF MINERAL FERTILIZER PRODUCTION IN UZBEKISTAN
This article outlines the current condition of mineral fertilizers production in Uzbekistan, the demand for mineral fertilizers, and especially the role of local raw materials in the production of phosphorus fertilizers from the Central Kyzylkum Phosphorite.Especially, mineral fertilizers have the...
3 June 2026, 22:05
PARAMETRIC STUDY OF CUTTING SPEED, FEED RATE, AND DEPTH OF CUT ON MATERIAL REMOVAL RATE IN MILD STEEL TURNING OPERATIONS
Metal cutting constitutes a cornerstone of modern manufacturing, and the systematic optimisation of cutting parameters is essential to ensure continuous advancement in the quality of engineered and fabricated products. The present work seeks to quantify the effects of key machining parameters —...
3 June 2026, 22:04