bluuebunny/crossref_metadata_2025_split huggingface dataset:
Protection of water supply sources from the emergency oil spill on the water surface
Authors: Akhtyamov R , Titova T S , Glazkov D V , Gavrilin I I 
Published: December 2021

Abstract
The article provides an algorithm for organizing oil spill response on the water surface, as well as the results of the analysis of existing methods of oil and oil product spill response. In order to improve the complex of measures to eliminate oil spills on the water surface, the main requirements for oil-absorbing materials are given. It is shown that the localization and elimination of oil and oil products spills on the water surface due to the destruction of the underwater passage of the main oil pipeline requires a set of works that require the use of various methods and the use of the necessary technical means. The developed set of measures for organizing work in response to oil spills on the water surface and the results of the analysis of existing methods for responding to oil and oil products spills will reduce the time for containment and response to the spill, taking into account the optimal choice of technology for cleaning the coastal strip from oil pollution.
Evaluation of the geoecological and fire situation in case of the oil spillage on the water surface
Authors: Titova T S , Akhtyamov R , Bondarenko V V , Pavlova V L 
Published: December 2021

Abstract
The work provides an assessment of the geoecological situation during an oil spill on the water surface. The modeling of the process of oil burning on the water surface is carried out, and also a model for estimating the oil burning time during depressurization of the underwater passage of the main oil pipeline is proposed. The assessment of individual and social risk in case of ignition of an oil spill as a result of depressurization of the underwater crossing of the main oil pipeline is given. The fire risk assessment was carried out under the condition of a guillotine rupture of the underwater pipeline, since, despite the lowest frequency of this type of depressurization, the levels of exposure to damaging factors, due to the largest volume of oil spills, will be maximum and will make the main contribution to the magnitude of the fire risk. When forecasting an emergency, a model of the spread of an oil slick along the water surface of a watercourse was developed, which takes into account the wind speed and the speed of the river flow.
Changes in the kinematic viscosity of engine oil during the operation of marine diesel engines
Authors: Zhukov V , Melnik O , Khmelevskaya E 
Published: December 2021

Abstract
A prerequisite for the long-term and safe operation of marine diesel engines is the high quality of operational materials, which include engine oils and coolants. The required quality of operational materials is ensured by the introduction of additives into their composition, which are now increasingly used as nanoparticles. During operation, as a result of the destruction of additives, the operational properties of coolants and engine oils deteriorate. The conducted studies allowed us to evaluate the change in the lubricating ability of engine oils of two brands that are used in marine diesels during operation. As a characteristic of the lubricating ability of the oil, its kinematic viscosity was used. The experimental determination of the kinematic viscosity of engine oil samples having different periods of operation, and the subsequent mathematical processing of the experimental results made it possible to determine the dependencies characterizing the change in the kinematic viscosity of engine oil during its operation. The research results confirm the possibility of scientific justification for extending the use of marine diesel engine oils, which reduces operating costs and increases the environmental safety of marine diesel engines.
Assessment of the intensity of engine oil contamination during operation
Authors: Zhukov V , Melnik O , Khmelevskaya E 
Published: December 2021

Abstract
The acceleration of internal combustion engines leads to an increase in thermal and mechanical loads on the most critical parts. To ensure the required resource indicators in conditions of increased loads, it is necessary to use high-quality lubricants, the requirements for the operational properties of which are also steadily increasing. In order to ensure the necessary physical and chemical characteristics of engine oils, additives are introduced into their composition, but during operation the quality of engine oil decreases, the reasons for this are both the destruction of additives, and the accumulation of dirt particles in the oil and the ingress of fuel and coolant into the oil. The conducted studies are devoted to determining the intensity of engine oil contamination under operating conditions in the Wärtsilä 6L20 engine lubrication system and the effectiveness of the dispersing additives contained in the oil. Samples of Petro Canada and TARO oils brands were used as prototypes at the beginning of the operational period, at the time of average operating time and at the time of oil change. The dispersing ability of the oil was determined by the method of assessing the oil stain. According to the results of the research, it is concluded that when the properties of the oil change as a result of contamination, their dispersing ability remains satisfactory. This result can serve as a justification for extending the service life of engine oil, provided that its properties are monitored during operation.
Simulation model as a tool for handling equipment operation diagnostics
Authors: Ezhov Yu , Zub I , Zhuravlev A 
Published: December 2021

Abstract
Efficiency of handling equipment reduces the service time of vehicles arriving at the container terminal. A simulation model of the operation of handling equipment allows reducing the time for diagnosis handling technique with its failure. The model constructed by means of apparatus of Petri Nets the formalism of Petri Nets provides the precision of definitions and reflects the structural and logical connection of the simulated events. The visualization and simplicity of Petri Nets allows the technician has no special training to use these models. This paper examines the reach stacker model, these types of machines that used in container terminals. A Petri Net simulating the operation of the reach stacker – hierarchical, has a built-in network positions. Hierarchy of networks identified position to ensure secure operation techniques, conflict situation, and analyzed solutions. Position having the chips are nodes, which can cause failures.
Study of cooling properties new quenching media
Authors: Bogdanova N , Kuzmin A , Tretyakov D 
Published: December 2021

Abstract
The paper presents the results of testing the cooling capacity of a number of quenching oils using the device “IVF SMART QUENCH” of the company [[CHECK_DOUBLEQUOT_ENT]] IVF [[CHECK_DOUBLEQUOT_ENT]] (Sweden). The tests were carried out in order to expand the range of suppliers, to find alternative quenching media that match the cooling characteristics of traditionally used quenching oils. Both new and traditionally used quenching oils for volumetric quenching were tested. The cooling capacity characteristics of the Voltes 16 and Voltes 26 quenching oils were tested in comparison with the Thermo Oil 16 and Thermo Oil 26 oils used. The characteristics of Thermo Oil 16 and Thermo Oil 26 quenching oils in the “before operation” state (selected from storage tanks) were evaluated, and in the “during operation” state (selected directly from the quenching tanks). Based on the results obtained, the quenching media Thermo Oil 16 and Thermo Oil 26 produced by “TNK Lubricants” LLC in Ryazan are recommended for further practical use. The paper uses methods of statistical data processing to determine the characteristics of the stability of technological processes - the reliability and suitability indices.
Study results of the choice of barium salts reagents for wastewater treatment from sulfates
Authors: Girikov O , Matyushenko E , Voitov E 
Published: December 2021

Abstract
The research on the removal of sulfates from mine wastewater is presented in the article. A new purification method has been proposed that allows removing a significant part of sulfates by precipitation in the form of barium sulfate. The present studies were devoted to the removal of sulfates from mine wastewater with a sulfate content of 1050 mg/l by introducing various doses of barium-containing reagents, namely barium chloride, hydroxide and barium carbonate. Among the listed reagents, the best results were obtained, using barium chloride and hydroxide. The use of barium chloride with a dose of 2700 mg/l and barium hydroxide with a dose of 3200 mg/l made it possible to reduce the concentration of sulfates below the maximum permissible (100 mg/l) when discharged into a reservoir for fishery purposes. A reliable in operation technological scheme for removing sulfates from highly concentrated mine wastewater has been developed, which makes it possible to reduce sulfates in the treated waste liquid discharged into the reservoir to 100 mg/l and below. In this case, the purification is carried out with separation of streams - in a smaller part (about 26% of the incoming); barium chloride is introduced, in the second - barium hydroxide. After that, the streams are mixed again, settled, sent to the calciner and to the post-treatment facilities and discharged into the reservoir. The resulting sludge is stored in special landfills or is processed to extract valuable components.
Mathematical model for forecasting of violations in the field of veterinary medicine using the Markov chain
Authors: Sokolov A , Batova V , Moiseev A 
Published: December 2021

Abstract
Activities within the field of veterinary medicine require an efficient governmental administration, including planning, programming, accounting and result analysis, in addition to control and supervision. As a result, it is crucial to have a theoretical understanding of the new forms of interaction between executive authorities at different levels and the economic entities carrying out these activities. Therefore, the improvement of the regulations governing this field is highly required. The solution is also linked to the improvement of the current legislation governing socio-economic processes, using a new reliable model. In this context, the main goal of this study is to develop proposals to improve the current legal regulation of administrative infractions in the field of veterinary medicine. The authors of this paper applied a multi-agent approach to identify groups of law subjects. They also developed a mathematical model using Markov chains to predict infractions in the field of veterinary medicine. The model is formed of “transition matrices” and takes into account the various reaction strategies of regulatory authorities. Such a strategy shows the likelihood of committing infractions and can form a basis for reforming the current legislation ruling the conduct of control and surveillance procedures using a risk-based approach.
Description by the method of combustion mass transfer of a gasoline-hydrogen-air mixture and reduction of harm to the environment
Authors: Ismatov J , Matmurodov F , Kholikov A , Abdullaev A , Djalilov J , Muhammadiyev U 
Published: December 2021

Abstract
The prospects for the use of hydrogen in automobile engines have been studied, it is possible to summarize, first of all, in relation to environmental friendliness, renewable and unlimited raw materials and the unique characteristics of the engine, which allows the use of hydrogen without making fundamental changes in modern engines. The norms for the emission of harmful substances into the environment are given and ways to reduce the emission of these harmful substances are shown. The schematic diagrams of the hydrogen electrolyzer are developed and the transfer of hydrogen to the combustion chambers is indicated. The paper describes the combustion process of a gasoline-hydrogen-air mixture using the mass transfer method.
Mathematical modeling of flow hydraulics as a result of the development of the NSM channel open pit (on the example of the Tom river)
Authors: Pilipenko T , Mikhailova T , Panov D 
Published: December 2021

Abstract
Active development of channel pits has begun with the aim of extracting nonmetallic building materials for the construction of cities and towns. When developing open pits, violations and non-fulfillment of compensatory measures in the river bed are possible. As a result of nonfulfillment of these measures, changes in the level regime of the river occur. All these actions lead to disastrous consequences. Therefore, the article considers the section of the Tom River. In its channel it is planned to develop a quarry of nonmetallic building materials. For the section of the quarry, the landing of the water level was determined, through a change in the slope of the free surface and the total drop in the water level. the change in flow rates in the everyday state was analyzed, development of the open pit was taken into account. To visually display the depth of the open pit, a matrix of heights was formed at the site of the Popadeykin deposit of sand and gravel materials. Based on the elevation matrix, a 3-D model of the pit was built, both before and after dredging. According to the data obtained, a possible change in speeds after the development of a quarry was predicted in comparison with domestic ones. The intervals of the velocity of the eroding and non-eroding flow were calculated.
Assessment of the possibility of operating low-pressure hydroelectric facilities in order to improve the conditions of navigation in their lower reaches
Authors: Ageev S , Voronina Ju , Sitnov A , Bik Yu 
Published: December 2021

Abstract
The paper provides an assessment of the projected low-pressure hydroelectric facility operation on the Volga River from the point of view of navigation conditions in its lower reach. The operating mode of the low-pressure hydroelectric facility completely depends on the hourly discharges of the Nizhny Novgorod HPP, located upstream. Significant unevenness in time of the supplied discharges from the Nizhny Novgorod HPP, which, repeating itself when discharging flows into the lower reach of the Nizhniy Novgorod low-pressure hydroelectric facility, can lead to negative consequences for shipping in terms of failure to provide transport passes and necessary depths. It is proposed to reduce the unevenness of discharges by introducing diurnal flow regulation into the low-pressure hydroelectric facility operation, aimed at changing the hydrological regime of the river section to improve the conditions and organize uninterrupted and safe navigation in the lower reach. Achievement of the regulation goal associated with minimization of interval deviations of the supplied flow rates from Nizhny Novgorod HPP from the daily average values and the fulfillment of the restrictions on the hydrological regime of the low-pressure hydroelectric facility ponds, is achieved by two control options (three-stage and two-stage). The study used the methods of mathematical statistics and probability theory, optimization of management decisions. The methodology of the mathematical model limitations’ nonfulfillment elimination for solving the problem and optimization of the low-pressure hydroelectric facility daily hydrograph is presented. Using a specific example, the problem of diurnal regulation of discharges is solved and the obtained effect is described.
Experimental study of the resistance to the movement of trimaran vessels
Authors: Korepanov A , Ronnov E 
Published: December 2021

Abstract
The aim of the work is to develop a method for finding the resistance of a trimaran ship at the initial stages of design, depending on the geometric characteristics of the central hull, outriggers and their mutual position. The program of model tests in the experimental tank is characterized. Based on the analysis of the experimentally obtained data, the graphs of the resistance dependence on the Froude number for the trimaran ship model with the fore, central and stern arrangement of outriggers are presented. A graph of the outriggers’ location influence along the vessel length on its hydrodynamic resistance is also shown. A method for calculating the hydrodynamic resistance for a trimaran vessel at the stages of research design is proposed, which is an adjustment of a single-hull vessel model tests’ recalculation classical principle. One of the developed graphs of the residual drag coefficient dependence on the relative speed according to the Froude number for various central hull geometric characteristics of the vessel, outriggers and their relative position is presented. The analysis of serial model tests made it possible to establish the dependence of the trimaran ship resistance on the geometric characteristics of the central hull and outriggers, and their relative position relative to each other in this study. The method proposed in this work will make it possible to substantiate the best layout of outriggers when solving the problem of optimizing the design elements and characteristics of a trimaran at the research design stage.
Improvement of the method of combined plans for the analysis of channel re-formations of a water body on the example of the oka river section
Authors: Matugin M , Miltsin D , Reshetnikov M , Mazgaleva A 
Published: December 2021

Abstract
The article discusses the ways of improving the method of combined plans for a water body channel reformations analysis on the example of a section of the Oka River. The main disadvantages of the existing classical approach to the analysis of channel processes through the channel surveys separate isobaths’combination are highlighted. A new approach to combining digital models of the river bed relief obtained from the hydrographic surveys results is proposed. Two directions of surface comparison are shown for the subsequent analysis of channel processes. For a qualitative assessment of channel changes, it is proposed to construct a new surface of vertical deformations and visualize it in color gradation or using lines of equal vertical deformations. For a quantitative assessment of channel processes, the use of a cartogram of vertical channel deformations is considered, and the numerical parameters for assessing the stability of the river channel are introduced. For the considered section of the Oka river channel, the main indicators of channel processes were obtained and analyzed using the proposed updated method. Separately, the calculation of the most optimal grid size was performed when constructing a cartogram of vertical channel deformations.
The assessment of distribution of GSM signal on the route with the difficult relief and mainly deciduous wood
Authors: Vegera D V , Zhiba G V , Pisarenko V P 
Published: December 2021

Abstract
This article is devoted to assessment of distribution of radio waves for GSM technology in the range of 900 and 1800 MHz. A fading calculation is conducted for a route with difficult relief with the mainly leafy forest. An imitation design was carried out by means of MATLAB environment for comparison of theoretical and practical results.
Using the Loginom analytical platform to process long-term field experience data
Authors: Chernysheva K , Karpuzova N , Afanasyeva S , Korolkova A 
Published: December 2021

Abstract
The article discusses the capabilities of the Loginom analytical platform for processing long-term field experience data; such software components are used as data transformation (row filter, sorting, grouping, cross-table, cross-diagram, sliding window); preprocessing (editing emissions, smoothing), research (correlation analysis, factor analysis), Data Mining (self-organizing network, clustering) to identify the effect of crop rotations, soil liming, application of various combinations of mineral and organic fertilizers, weather conditions on yield of oats and barley.
Parametric modeling compressed ellipsoid of rotation as the analytic surface
Authors: Kravchenko Galina , Trufanova Elena , Shilyaeva Olga 
Published: December 2021

Abstract
The article deals with the shaping of the analytical surface in the form of a compressed ellipsoid of rotation. In the process of research, the principle of the golden section was applied, an ellipsoid of rotation with optimal parameters for the design of a large-span unique building of the exhibition complex was obtained. To solve the problem of choosing a rational analytical surface in the Lira-CAD software package, three variants of constructive solutions for the frame of the exhibition complex have been developed. The finite element method is used, the most popular numerical calculation method for studying the stress-strain state of large-span buildings and structures. The analysis of the calculation results made it possible to choose the optimal variant of the structural solutions of the building frame. The check of the dynamic characteristics of the proposed structural solution of the building frame is carried out. The obtained results of the dynamic calculation showed the correctness and efficiency of the adopted structural solutions of the building frame.
Approximate methods for calculating the impact of a massive body on a plate lying on the base
Authors: Rukhlenko S A 
Published: December 2021

Abstract
Normal impact of a massive body on a uniformly stretched plate lying on the base is investigated. A hinged round or rectangular plate on an elastic base, or an infinite plate on the surface of an ideal incompressible fluid is considered. The solution to the elastoplastic impact is in good agreement with numerical calculations and experimental data. With a small parameter of elastic collapse, that is, with the developed local plastic deformations, a solution to the problem of impact with rigid-plastic local collapse can be used. Approximate formulas for calculating the main characteristics of rigid-plastic impact are set up.
Internal friction influence on the calculation results and rod system optimization under impulse action
Authors: Grebenuk G , Veshkin M 
Published: December 2021

Abstract
An algorithm for calculating elastic rod systems under the action of impulse loads, using a complex model of internal friction in the material, has been developed and implemented in software. Very short (instantaneous) and extended in time impulses are considered as variants of impulse action. The importance of taking into account the vibration energy dissipation due to internal friction in the material of the structure is shown, considering impulse effects. The implemented software module is used to calculate the dynamic responses of the system in the search for the optimal solution of the control program for the selected variable parameters, target and restrictive functions. The problem of optimizing a flat frame system loaded with static and impulse loads has been posed and solved. An algorithm for finding an optimal solution is considered. Variants of dividing variable parameters into generalized groups are discussed. The minimum volume of material, spent on the structure, is taken as an optimality criterion. Analysis of the influence of the pulse duration of a given value on the calculation results without and with internal friction, as well as a comparative analysis of the optimal designs obtained without and with internal friction in the material and various tolerances for horizontal displacements. The results obtained indicate a significant effect of internal friction on the characteristics of the optimal design, especially with active movement restrictions.