The article considers a new approach to solving the problem of increasing the reliability of diagnostics of biological tissues based on a combination of azimuthally invariant polarization and fluorescence methods for diagnosing the structure of optically anisotropic tissue samples. The improved diagnostic method involves measuring the intensity distributions of autofluorescence...
The paper presents a methodology for performing mine surveying calculations of quarterly surveying of extracted block raw materials and overburden using aerial photogrammetry technology. The research is based on the use of the DJI Mini 3 Pro unmanned aerial vehicle for surveying deposit areas and subsequent data processing in specialized software Agisoft Metashape and Civil 3D...
In recent years, remote measurement methods have been developed and popularized. The expansion of human activities caused this development. As the mining industry constantly evolves and projects become increasingly complex, the application of remote measurement will continue to grow rapidly in the coming years. The use of UAVs for surveying is increasingly finding applications in...
The relevance of the presented research is driven by the significant role of the mining industry in the economy of Zhytomyr region, which is a leading region in Ukraine in terms of natural decorative stone extraction volumes. The aim of this study is defined as a comprehensive analysis of development trends in extraction and export of natural stone, assessment of the industry’s...
The article presents the results of experimental studies of the influence of the geometric parameters of the operation of a waterjet machine on the quality and decorativeness of the surfaces of plate blanks made of natural facing stone, which is expressed by the criterion of surface roughness of samples of high-strength granites of the Ukrainian crystalline shield. The analysis...
The article is devoted to the study of modern technologies of geometrization and digital modeling at open-pit mining enterprises. The relevance of the work is due to the requirements for optimizing mining processes, ensuring labor safety and increasing economic efficiency in the exploitation of deposits. The research methodology was a system analysis, statistical data processing...
The article deals with the issue of geometrization of structural elements of a gabbro deposit in order to improve the processes of its geological and economic assessment and determine the optimal directions of development. The main goal of the study is to create spatial models of the deposit that reflect the distribution patterns of the main structural elements, such as tectonic...
The article presents an improvement in the technology of iron ore enrichment by increasing the efficiency of gravity-hydraulic enrichment in radial thickeners of the MD9 type, which consists in the development of a new method for forming the output power of the device. Studies of the flow of magnetite suspension from the feeding device of a magnetic deslimer are presented, which...
This paper examines the impact of the granulometric composition of blasted rock on the performance of excavators in mining operations. Special attention is given to the effect of fragment size distribution, specifically logarithmic dispersion, on the loading cycle duration and excavator productivity. Chronometric observations were conducted at the Davydivskyi Granite Quarry...
Compacted graphite irons increasingly being used in mechanical engineering due to the successful combination of mechanical properties of gray and high-strength cast irons, including high strength, ductility, thermal conductivity and the ability to dampen vibrations. Thanks to these properties, this material is used to make body parts, cylinder blocks, brake discs and other loaded...
The article presents the results of studies to determine the influence of cutting forces on the quality parameters of machined surfaces as a result of finishing face milling of products made of compacted graphite cast iron (CGI) using round cutting inserts made of cubic boron nitride (CBN) and nitride ceramics (NC). Based on the results obtained, second-order regression models...
The article investigates the influence of mechanical post-treatment on the geometric and physical and mechanical characteristics of products manufactured by additive layer modelling (in particular, FDM). The mechanisms of formation of the defective layer arising from the hollow, anisotropic structure of the material, as well as temperature and force loads are considered. For the...
One of the most urgent tasks of modern mining production is to ensure the stability and adaptability of the mining operation schedule in stochastic management conditions. The paper substantiates an approach to building a calendar plan based on optimizing the position of the averaging line of the mining operation schedule in the three-dimensional coordinate space of the mining...
An approach to quantitatively determining the stability of the cutting process under dynamic loading conditions is demonstrated. With this method, it is proposed to evaluate the time series of cutting force values and determine the stability index as a function of the prediction accuracy, which is determined by the root mean square error of deviation (RSME) of the predicted and...
Technological cost is a key indicator of product competitiveness; therefore, the ability to manufacture high-quality and precise components at a low production cost contributes to the overall advancement of a mechanical engineering enterprise. The main approaches to regulating technological cost include reducing the following: machining time for a component, downtime of selected...
The paper presents the results of an experimental study on the influence of cutting force components on machining quality during finish face milling of the grey cast iron GCI21 (similar to EN-GJL-200) using a specially developed face stepped milling cutter. Special attention is given to the analysis of cutting forces, surface roughness, and flatness deviations of the machined...
Modern industry and transport industry are impossible without the use of technological methods and means of restoring the operational characteristics of equipment. Railway transport enterprises have recently paid considerable attention to the development and implementation of resource-saving and environmentally friendly technologies for the repair and restoration of rolling stock...
Wettability is an important functional property of a surface that is of fundamental importance in many fields of science and technology, from mining to biomedicine. NiTi alloys are becoming increasingly used in various industries, which requires the investigation of their wetting properties after various technological processing methods. Different machining methods create a...
The article analyzes the influence of the morphology of graphite inclusions and the physical and mechanical properties of cast irons on the temperature and force conditions in the cutting zone during blade processing. The features of machining gray cast iron (GI), cast iron with vermicular graphite (CVG), and high-strength cast iron with spheroidal graphite (HSG), which are...
The article presents an overview analysis of approaches to ensuring the reliability and efficiency of technical operation of motor vehicles through the implementation of engineering solutions considered as an element of a controlled dynamic system. Reliability management is based on system analysis of vulnerable components, application of methods for assessing reliability...
The article investigates the effect of changing the maximum size of the finite element of the dynamic grid on the accuracy of calculating the aerodynamic drag force of a linehaul train. The calculations were performed in the Ansys Fluent environment, which allows modeling air flows and their interaction with objects, in particular with a linehaul train. Several variants of finite...
The article presents an assessment of the accuracy characteristics of the methods of numerical differentiation and integration used in a computerized device for measuring the parameters of the motion of objects. These are technological equipment and industrial products at quarrying and stone-working enterprises, for which, during the control of the technological process, it is...
Modern industry places strict requirements on continuous monitoring and automation of processes involving liquid media. Precise control of liquid level and density directly affects the safety, efficiency and environmental performance of production. Therefore, the introduction of reliable measuring devices capable of operating in real time and withstanding difficult operating...
Determining the angular position of a signal source is an important task in radar, radio navigation, and communication systems. In this paper, to determine the angular position of the source, it is proposed to use the method of the phase difference of signals arriving at the spaced reception elements. The harmonic oscillation is considered as a model of useful signal, and the non...
In today’s digital landscape, web applications have become an integral part of everyday life, enabling seamless access to information, services, and user interaction. Most modern applications are centered around the dynamic relationship between data and the user interface, which creates significant demands for efficiency in data processing and real-time interface updates. One of...