bluuebunny/crossref_metadata_2025_split huggingface dataset:
Formation of the separation characteristic of ore material thickening based on the model predictive control method
Authors: Morkun V , Morkun N , Tron V , Serdiuk O , Haponenko I , Haponenko A 
Published: July 2022

Abstract
The aim of the investigation is to form an optimal separation characteristic of beneficiation processes on the basis on operational information on time-varying of their parameters exemplified by the process of thickening ore raw materials. Methods of research. In the research work, the following methods are used: analysis of scientific research and practical experience; statistics methods and the probability theory for estimation of experiment results; methods of analytical synthesis and numerical simulation; methods of model predictive control for developing control algorithms of the thickening process; numerical simulation methods for synthesizing and analyzing a mathematical model. The scientific novelty of the investigation is in finding optimal values of the control horizon and the prediction horizon in terms of quality control for a single-channel system of model predictive control of ore raw material thickening. Practical significance involves development of methods and software for determining the control horizon and the prediction horizon values of the single-channel system of model predictive control of the process of ore raw material thickening that are optimal from the point of view of quality control, this enabling optimization of separation characteristics of ore raw material thickening. Results To form a separation characteristic of the process of ore raw material thickening based on model predictive control for the single-channel control system of the thickening process, satisfactory control results are achieved by setting the control horizon equal to one interval. For this value, the quadratic control error does not exceed 0.1452-0.1474. A further increase in the prediction horizon is not feasible since it does not allow significant reduction of the quadratic control error. At the same time, the value of 3-5 intervals is sufficient for prediction horizons. These values are determined by an increase in computational complexity of prediction by 10-20 intervals, which causes a slight decrease in the quadratic control error.
The mining and geometrical methodology for estimating of mineral deposits
Authors: Pysmennyi S , Peremetchyk A , Chukharev S , Fedorenko S , Anastasov D , Tomiczek K 
Published: July 2022

AbstractEnsuring the correct development of the deposit is a priority production task, which is based on a scientifically grounded assessment of the geometrical characteristics of the mineral deposit and a clear understanding of the nature and quantity of the deposit’s re-serves. Aim of the study is a geological and industrial assessment of a mineral deposit, which provides for the correct determination of the quantity and quality of explored reserves, requires the collection and processing of such material, which would be sufficient to draw up a technically correct and economically feasible project for the development of the deposit. The research methodology consists in mining and geometrical modeling and monitoring of subsoil based on progressive and classical methods and techniques for geometrization of the array of minerals and host rocks. This includes a set of measures aimed at collecting and evaluating the initial information, assessing its accuracy, mathematical processing and determining the optimal and most effective methods for solving the problem of geometrization of the field. The results allow us to practically solve the problems of mining operations related to the assessment of reserves of mineral deposits, their genesis, the nature of occurrence, quality, the possibility of sorting, forecasting and industrial development. An effective set of methods has been developed based on the statistical assessment of mineral deposits, as well as the use of the latest geoinformation systems, which provide the possibility of high-quality and accurate calculation and assessment of mineral deposits.
Problematics of the issues concerning development of energy-saving and environmentally efficient technologies of well construction
Authors: Pavlychenko A V , Ihnatov A O , Koroviaka Ye A , Ratov B T , Zakenov S T 
Published: July 2022

Abstract
Specialists of Dnipro University of Technology are among the leading researchers involved in studying the specifics of implementation and functioning of rational and energy-efficient schemes of organization of circulation processes while well drilling and operating. In particular, we have carried out thorough and comprehensive studies of physicochemical phenomena used while creating, preparing, and using the washing fluids. The purpose of the paper is to study and generalize the approaches to designing the parameters of hydraulic well washing programme under complicated geological and technical conditions, analysis of the factors of its correction basing on substantiation of analytical and research regularities of well circulation processes, and optimization of a component and quantitative composition of drill cleaning agents, which are aimed at the most efficient intensification of the bottomhole breaking processes. The development and implementation of a progressive complex hydraulic washing programme for wells under construction are analyzed involving modern methods of analytical analysis and experimental studies. The drilling circulation processes in a well were modelled in terms of experimental wells involving a drill rig UKB-4P and corresponding auxiliary tools and equipment.
Magnetite and hematite quartzites - common features and technological differences
Authors: Ivanchenko V V , Ivanchenko A V , Stetsenko V V 
Published: July 2022

Abstract
In the process of developing deposits of magnetite quartzites, hematite quartzites are simultaneously involved in mining. But the processing of hematite quartzites is associated with significant difficulties, so they accumulate in warehouses, landfills and spread uncontrollably in the environment. A detailed study of the features of the composition, structure and technological properties of hematite ores made it possible to develop a new method for complex processing in a vortex air-mineral flow. Under laboratory conditions, a number of commercial products were produced from them: iron ore concentrate, sinter ore, clinker ore, mineral paint and quartz sand, without waste accumulation. The formation of magnetic floccules is reduced in the air stream. Therefore, this technology also improves the processing of magnetite ores.
Hydrological simulation and assessment of the optimal parameters of the water replenishment of the floodplain lake and old riverbed on the Uzh river
Authors: Velychko S V , Dupliak O V 
Published: July 2022

Abstract
One of the tasks in modern approach of the water resources management is improving environment health by the way of the river restoration. On the urban area it is impossible to provide full river restoration, but at the same time it is possible to create the environment close to natural. In our work on the example of the river Uzh located inside the city provides the assessment of the restoring possibility of the part of the floodplain by water replenishment of the old riverbed during the vegetation season. Flood control dyke construction interrupted the connection between old riverbed and river and as a result floodplain lake became muddy, silted up and lost its attractive form. To assess the possibility of the floodplain lake replenishment, the simulation of some scenarios were carried out: natural condition, water replenishment during flood, pumping water, raising water level in the river Uzh near the lake. The connection of the lake and the old riverbed with the river will improve slightly the storage capacity of the lake and allows to provide the depth of up to 1.0 m in the lake during flood, but the water will be absent in the old riverbed during the dry season. Hydraulic calculation showed that replenishment during spring floods and pumping water were not possible due to high hydraulic conductivity of the gravel and pebble soils. The old riverbed replenishment is possible by raising water level in the river Uzh, which will ensure the free water flow into the lake and into the old riverbed during the dry season.
Model substantiation of strategies of economic behavior in the context of increasing negative impact of environmental factors in the context of sustainable development
Authors: Ivanov R V , Grynko T V , Porokhnya V M , Pavlov R A , Golovkova L S 
Published: July 2022

Abstract
The concept of sustainable development considers environmental, social and economic issues in general. And the goals of resource conservation and socio-economic development do not contradict each other, but contribute to mutual reinforcement. The purpose of this study is to build and test an economic and mathematical model for the formation of strategies for the behavior of an economic entity with an increase in the impact of negative environmental factors. The proposed strategies and their models are based on the income-expenditure balance equation, which takes into account both quantitative and qualitative characteristics. The constructed models are considered in the state space. The research methodology is based on building models in the form of linear combinations of functions of a homogeneous external impact and various spatial combinations of economic sources (sinks). The study makes it possible to assess the dependence of the amount of resources used for life support on the chosen adaptive strategy. Within the framework of the proposed model, it was found that the criterion for the effectiveness of the applied strategy can be an indicator of satisfaction with the state, the preservation of which, simultaneously with the preservation of the size of resources used, corresponds to the direction of optimization. This approach is consistent with the concept of sustainable development.
Justification of the method of soil densification of the interstation tunnel by jet injection based on computer modeling
Authors: Vapnichna V V , Korobiichuk V V , Zuievska N V , Iskov S S , Kovalevych L A 
Published: July 2022

Abstract
The article is devoted to a topical issue - the development of a method of densification of the base of the underground interstation tunnel to prevent further intensive subsidence of tunnel structures. Based on computer-mathematical modeling, the work establishes experimental dependence between the angle of inclination of jet grouting piles and the amount of subsidence of the distribution plate on which the tunnel structures rest upon. Inspection of the technical condition and analysis of defects in a comprehensive comparison with subsidence graphs allowed us to identify the main typical deformations during subsidence of a shallow tunnel built from blocks of a solid-section frame, namely their characteristic features, geometric parameters and placement points.
Increasing of strength-rigidity parameters of bases of metallic silos
Authors: Butenko A A , Mozgovyi A O , Butnik S V , Spirande K V 
Published: July 2022

Abstract
To date, effective codes of Ukraine limit settlement of foundations of metallic silos to 15 cm. To provide normative settlement of foundation with diameter up to 40 m and more is not always possible without additional essential measures for strengthening or changing base soils. Taking into account high levels of loads, soils of bases in natural condition can not carry stress under the base of foundation and require strengthening. Execution of works on change of soils of bases or installation of soil cushions is not always possible taking into account underflooding of territory, building development that exist near at hand, or other complicating factors. Soil cement after Deep Soil Mixing (DSM) technology, Jet Grouting, injection and micropiles were considered for different types of strengthening taking into account application in great volumes. From analysis of the obtained results, it was determined that soil cement after Deep Soil Mixing technology is the most economically justified method. Application of Jet Grouting is justified during strengthening of soil thicknesses locally separated by depth. Injection and micropiles are used appropriately only in conditions of reconstruction under absence of direct access to the base.
Investigation of the influence of technological factors and compositions of binders on the strength characteristics of blast–furnace cement with magnetized ferromagnetic additives
Authors: Sakhno S I , Yanova L O , Pischikova O V , Sergiienko T S 
Published: July 2022

Abstract
Cement production is a significant source of carbon dioxide emissions. One of the ways to reduce emissions is to reduce the proportion of clinker in cement by introducing active mineral additives into its composition, particularly granulated blast-furnace slag. One of the ways to increase the activity of such cement is the effect of magnetic fields on the spin multiplicity of the substances involved in the hardening reaction. In this case, the maximum effect is ensured by introducing a magnetized finely dispersed ferromagnetic substance into the cement composition. The activation effect depends on the additive’s adding method to the cement’s composition, the components ratio in the cement, and the cement hardening mode. This work aims to identify the influence of the adding method of the additive, the slag and additive proportion in cement, and the steam curing temperature on the activity effect of the binder. Three groups of studies were carried out to determine the strength characteristics of laboratory samples hardened both in natural conditions and during steaming. In the first group, cement samples have tested containing 40% slag obtained by joint grinding and joint mixing of the additive with cement for 0.5, 1, 2, 4 and 8 minutes. In the second group, samples have tested with the additive amount varied from 0 to 2.5%, and slag amount from 0 to 80%. Finally, cement samples were tested in the third group containing 50% slag and from 0 to 2.5% additive. The samples were steam cured at temperatures ranging from 50 to 90° C and tested one day, 28 and 90 days after steam curing. As a result of the research, it has revealed that to obtain the maximum effect, the additive must be introduced into the cement composition by joint grinding. The factors influencing the activity have been determined. At the same time, the time of joint grinding should ensure uniform mixing of the components and the formation of new surfaces of cement grains in the presence of magnetic fields. Too long joint grinding leads to the loss of the magnetic properties of the addition. It was found that the activation effect from the additive addition increases with an increase in the proportion of slag. In cement without slag, an increase in the additive content leads to a drop in strength. It was revealed that the introduction of magnetized ferromagnetic dust additives into the composition of the SPC makes it possible to reduce the steam curing temperature of products by 20-25° C. Studies have shown that using a finely dispersed ferromagnetic substance as an activating additive can save energy resources and reduce emissions.
Investigation of energy-power parameters of thin sheets rolling to improve energy efficiency
Authors: Chubenko V A , Khinotskaya A , Yarosh T , Saithareiev L , Baskanbayeva D 
Published: July 2022

Abstract
In order to study processes occurring during manufacturing of thin steel sheet by cold rolling and change of energy-power parameters, simulation was performed using engineering software DEFORM 3D, which allows to reflect rolling technology accurately. Model of treatment process was created, output data, modes and temperature of treatment, motion parameters of rolls and sheets were set, material of workpiece was selected and its properties were determined. During simulation of sheets cold rolling process, Lagrange analysis was used, number of simulation steps was 100. Process of plastic deformation of metal along curved grid was investigated, vector displacement field was determined, and it was found that maximum movement of metal occurs under effect of top roll. Distribution of stress-strain state was investigated and maximum stress in strain zone was determined. Distribution of rolling forces and torque was investigated, which allowed to determine their maximum values. Maximum rolling forces and torque were observed at 7 – 9
th
second of treatment, and in future they were reduced due to the fact that pushing force disappeared and steady process began.
Capabilities of the WEBBIRDS system in the process of assessing the impact of wind farms on seasonal bird complexes on the example of spring migrants at the Botiieve wind farm in 2013-2021
Authors: Siokhin V D , Annenkov A B , Osadchyi V V , Horlova A P 
Published: July 2022

Abstract
This paper contains the analyzed results of field observations of the spring migration of birds on the territory of the Botiieve wind farm in 2013-2021. The work was carried out as part of the planned monitoring of the ornithological situation in the area of the Botiieve wind farm (Pryazovskyi district, Zaporizhzhia region) and also covered the Tubal Estuary formed by the confluence of the Velyka and Mala Domuzla and Akchokrak Rivers and in the mouth of the Korsak River. During each trip, up to 70% of the wind farm area was covered. There were given characteristics of the taxonomic composition of the ornithocomplex, flight phenology, height and direction of migration by seasons and months. In the spring period of 2013-2021, 156,910 individuals of 125 species were recorded in the project area. 52,575 individuals of 92 species of these birds (33.5%) were observed directly within the Botiieve wind farm and buffer zones and there were recorded 104,335 individuals of 99 species (66.5%) at the adjacent wetlands - the Botiieve Ponds and the Tubal Estuary. New methods for collecting, storing and processing information, including mapping, server storage and data processing using two web applications, have been proposed. In order to describe in detail the migration processes in the local area, methods of vector mathematics, as well as computer vision algorithms, were used. The result of the analysis was a gradient map of seasonal bird migration concentration, which allows a differentiated approach to assessing the threats to birds from operating wind turbines. The impact of the Botiieve wind farm on birds during the period of seasonal migrations is estimated to be low.
Active garden therapy for the elderly and people with disabilities
Authors: Turovtseva N , Bredikhina Y , Pererva V , Gnilusha N 
Published: July 2022

Abstract
Garden therapy has been used in the world medical practice for many decades. There are many examples where human interaction with plants has a positive impact or facilitates the lives of various segments and groups of society: children, youth, elderly people, with mental health problems, people with disabilities, crime victims, patients with cancer and Alzheimer’s disease, mental health problems, drug addicts and alcoholics, combatants, victims of military or terrorist acts, etc. Garden therapy is the process of using plants and the garden to improve well-being through the effects on the mind, body and soul. Garden therapy combines gardening and rehabilitation and is a synthesis of landscape design, medicine and psychology. It can help work with different target groups: in hospitals, nursing homes, rehabilitation and cancer centers, hospices, as well as other medical and residential complexes. Despite this, garden therapy is still not widespread in Ukraine and requires wider development. This is due to the general set of social and health problems, as well as regional problems of modern times, including the post-Chernobyl factor, the mass factor of post-traumatic stress disorders among the affected population of the temporarily occupied territories and the contingent of ATO participants. Undoubtedly, the urgent task today is to develop garden therapy programs for recovery from illness and combating the stressful effects of prolonged self-isolation during quarantine activities related to the COVID-19 pandemic. The article considers an example of creating a location for active garden therapy for visitors to the Center for medical and social rehabilitation services in Melitopol, Zaporozhia region.
Assessment of ecological and economic competitiveness of regions using factor analysis
Authors: Andrusiak N O , Andrusiak V M , Danylchuk H B 
Published: July 2022

Abstract
The article examines the assessment of ecological and economic competitiveness of regions using factor analysis. Ecological and economic competitiveness of the territory is formed from groups of components, some of which will determine its basic potential, others - the potential of possible development trajectories. The ratio of these components is different for each region and in each period of time when competitiveness is determined. Ecological and economic competitiveness of the region is determined by the ratio of several areas that interact and interdependent: social, economic, environmental. It is proposed to introduce the amount of atmospheric rent into the indicators of assessing the competitiveness of regions. Atmospheric rent is a fiscal lever of influence and a stimulus for the formation of ecological and economic competitiveness of the region. The factor analysis confirmed that the value of atmospheric rent is a significant indicator that belongs to the first, most important group of indicators, and therefore should be taken into account when conducting environmental and economic assessment. To study the ecological and economic competitiveness, there were built two models and compared by the results modeling. The most accurate model turned out to be additive, which is explained by a more balanced consideration of the load of indicators and the share of explained variation of data by each of the factors. The assessment of ecological and economic competitiveness was carried out on the example of regions of Ukraine and the ranks of these regions were determined.