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Ecology, industrial and environmental safetyDetermination of model functional dependencies of eco-safety optimization and management for tailings dumps slope structures

Determination of model functional dependencies of eco-safety optimization and management for tailings dumps slope structures

Determination of model functional dependencies of eco-safety optimization and management for tailings dumps slope structures Andrii Riabko ORCID: https://orcid.org/0000-0001-6305-3853 M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine The problems of eco-safety of alluvial massifs of tailings dumps of various industries intersects with the tasks of rational nature management, based on geomechanical studies, aimed at improving the structural parameters of hydraulic impoundments and dams. A necessary conditions for the development of environmentally safe technological solutions …

Innovative Technologies in Mechanical EngineeringA cascading method of installing several radial thrust bearings

A cascading method of installing several radial thrust bearings

A cascading method of installing several radial thrust bearings Volodymyr Dudnikov ORCID: https://orcid.org/0000-0002-7115-7086 Oles Honchar Dnipro National University The structure of modern technical systems in mechanical engineering includes many bearing units with rolling bearings. The practice of designing and operating the supports of various mechanisms and machines shows that under the conditions of significant axial loads, double or serially arranged radial thrust ball bearings with the contact pressure lines of the rolling elements directed into them in one direction are …

Information Technology and CybersecurityDevelopment of software for applied statistical analysis of random variables

Development of software for applied statistical analysis of random variables

Development of software for applied statistical analysis of random variables Oleksii Klymenko ORCID: https://orcid.org/0009-0009-5164-1688 Oles Honchar Dnipro National University Classical applied mathematical statistics is a branch of mathematical science that deals with the development and application of mathematical methods and models for the collection, analysis, interpretation and presentation of empirical data. It includes a wide range of methods used to study patterns in data, estimate distribution parameters, test hypotheses, and make predictions. Classical applied mathematical statistics is used in various …

Control Systems, Telecommunications and NavigationNumerical modeling of controlled motion of a quadcopter drone

Numerical modeling of controlled motion of a quadcopter drone

Numerical modeling of controlled motion of a quadcopter drone Liudmyla Hart ORCID: https://orcid.org/0000-0003-2617-7851 Oles Honchar Dnipro National University Volodymyr Ruzhevych ORCID: https://orcid.org/0009-0006-2127-4387 Oles Honchar Dnipro National University The paper focuses on the use of control theory tools to develop a mathematical model of the controlled movement of a quadcopter drone. The purpose of the work is to perform a numerical analysis of the proposed mathematical model of a quadcopter based on an integrated systems approach, which consists in the sequential …

Information Technology and CybersecurityPerformance testing of an exact algorithm for the Subset Sum Problem on different personal computers

Performance testing of an exact algorithm for the Subset Sum Problem on different personal computers

Performance testing of an exact algorithm for the Subset Sum Problem on different personal computers Mykhailo Lenskyi ORCID: https://orcid.org/0009-0001-1445-2142 Oles Honchar Dnipro National University Hanna Mykhalchuk ORCID: https://orcid.org/0000-0002-5476-6349 Oles Honchar Dnipro National University This paper investigates the performance of an exact algorithm for the NP-complete Subset Sum Problem on different personal computers. The Subset Sum Problem asks whether there exists a subset of a given set of integers that sums up to a specified target value. Finding exact solutions for …

Innovative Technologies in Mechanical EngineeringImprovement of the mechanical properties of gas turbine engine parts made of two-phase titanium alloys

Improvement of the mechanical properties of gas turbine engine parts made of two-phase titanium alloys

Improvement of the mechanical properties of gas turbine engine parts made of two-phase titanium alloys Oleksii Fedosov ORCID: https://orcid.org/0000-0002-6269-5288 Oles Honchar Dnipro National University The subject of this study is the features of weld seam formation in complex alloyed titanium alloys during electron beam welding in a vacuum and argon arc welding. The aim of this research is to ensure the required level of mechanical properties of welded joints for aviation and aerospace components made from complex alloyed two-phase titanium …