bluuebunny/crossref_metadata_2025_split huggingface dataset:
Theoretical Study of the Elements Vibrations of the Diesel Shunting Locomotive Cabins
Authors: Yaitskov I A 
Published: June 2019

Abstract
The article is devoted to the creation of the high-capacity transport vehicles, in which the use of vibro-active organs is increasingly used, inevitably leads to the increase in the levels of vibration and noise that are harmful to locomotive crews, and in the operation of the transport vehicles in the dwellings and to the acoustic environment pollution. This problem is relevant for the rail vehicles. First of all, according to the EU, it is necessary to implement measures for extinguishing noise in the places where it occurs, i.e. from the movement of the rolling stock. In this direction, the domestic and foreign experts carried out certain research. However, the formation process of the vibro-acoustic characteristics has not been studied enough. It should also be noted that the theoretical research of the vibro-acoustic dynamics of the rolling stock and methods for calculating vibration and noise spectra are limited that makes it difficult to substantiate engineering solutions for reducing the intensity of the sound emission from dominant noise sources. It is considered in the negative effect of the high level noise on workers of the locomotive crews, machinists and the environment, it is necessary to create rail vehicles with appropriate vibro-acoustic characteristics that meet the requirements of the international standards. For the locomotive’s cab, the significant influence of the structural noise component is characteristic. Therefore, this article presents the results of the theoretical studies of vibro-acoustic characteristics of the locomotives’ cabins based on traditionally used method of the energy balance for plate structures. In addition, the system of equations observes the elements of the glazing of the cabins as a “weak link” of the supporting structure. The obtained results determine the expected sound pressure levels in the design of the cabins and compare them with the maximum permissible values. The values of the excesses in the according frequency ranges are the main information for choosing engineering solutions for reducing noise levels at the design stage of such machines.
Calculation of Load-bearing Capacity of Tubula Anchor of Friction Type
Authors: Zubkov A A , Kutlubaev I M , Muhamedjarova M S 
Published: June 2019

Abstract
The load-bearing capacity of a rod of a tubular anchor of a friction type (friction-type anchor) is determined by the nature of its interaction with the walls of the hole. The preliminary (estimated) calculation of this indicator is difficult because of the lack of information about the deformed state of the rod. The proposed interaction scheme assumes coupling only over a part of the cross-sectional profile. Force factors are represented by concentrated and distributed loads. On the basis of accepted assumptions, a mathematical model which indicates rod-hole force interaction is formed. The determination of the parameters characterizing the adopted interaction scheme is based on the solution of the obtained nonlinear equations. The physical simulation of the process of installing the anchor in the borehole model was performed. The accepted scheme of interaction of a rod – borehole is experimentally confirmed. The results of numerical simulation have large convergence with experimental data.
Geosorbent Based on the Combination of Kuznetsk-Basin Coal Fly Ssh With Various Kinds of Lignin
Authors: Fux S L , Devyaterikova S V , Musikhina T A 
Published: June 2019

Abstract
Annually coal-fired heat-and-power plants produce up to 40 million tons of ash and slag in Russia, while the already accumulated in the ash-dumps waste exceeds 1.5 billion tons. In Russia alone heat power plants’ ash-dumps occupy over 20 thousand km2 of land area. Ash and slag waste reclamation volume in Russia doesn’t exceed 6 % of of their annual accumulation (annually only 1.5-2.1 million tons are recycled), while other countries recycle 50-100 % of ash and slag waste. Russia’s main coal-mining region is the Kuznetsk coal basin. The importance of the suggested fly ash geosorbent technology is in the fact that its use will make it possible to recycle and reclaim the already accumulated ash and slag waste, but the newly produced waste as well. Thus, the objective of the project in question is the study of the use of heat power plant fly ash as a gas-adsorbing agent in the chemical industry, and as a means to extract industrial oils and lubricants out of waste water.
Environmental Problems Mining Industry in the Arctic
Authors: Pesterev A P , Yakovlev V A , Kirillina A A , Solovev D B 
Published: June 2019

Abstract
In this article characteristics and indicators of climatic conditions of a North taiga subzone where works on extraction of alluvial diamonds from alluvial deposits of the northern rivers are intensively carried out are considered. Mining works are conducted in the open career way with full transfer of the natural bed of the rivers. It is followed by pollution of the rivers and adjacent territories. For assessment of state of environment monitoring researches with studying of contents and migrations of minerals in a soil cover were conducted. Results of a condition of the chemical composition of soils before technogenic influence are given in work.
Modelling of Dynamic Compensation for Isolated Neutral Power Network
Authors: Pinchukov P S 
Published: June 2019

Abstract
The paper deal with causes and consequences of the negative influence of harmonic components of currents and voltages in medium voltage distribution networks. The dynamic compensation benefits for filtering harmonic components of currents and voltages and eliminating current and voltage distortion from the power system are considered. In the paper the model of isolated neutral power network with the dynamic compensation device is created by simulation in the Matlab Simulink software. In the model a three-phase network was simulated by blocks from the SimPowerSystem database and the non-sinusoidal load was simulated by a three-phase bridge diode rectifier. The dynamic compensation filtering device is simulated by an inverter on IGBT-transistors and consisted of shunt reverse diodes, smoothing filters and capacitive storage. The simulation results show the reduction of the voltage distortion limits to the normalized values, thus we can eliminate the non-sinusoidal form of the voltage curve and make it sinusoidal by dynamic compensation in the distribution network. The dynamic compensation device operates correctly in the created model and is suitable for high-nonlinear, inductive, fast-changing and harmonic-generating loads, as it effectively fights against the violation of the quality of electrical energy.
Simulation of a Return Current System for AC Power Traction Network
Authors: Makasheva S I 
Published: June 2019

Abstract
The paper deals the problem of the reverse traction current’s asymmetry in the rail circuit under heavy haul traffic conditions for AC railways. The consequences and the possible causes of the negative influence of asymmetry of the return current system for AC power traction network are considered. For analyse the degree of influence of various factors on the reverse traction current’s asymmetry the return current system model is created in Multisim 12.0 software. The simulation model consists of the reverse traction current block-section. The model allows researching the influence of various factors including environmental conditions such as temperature and humidity, power and type of throttle-transformers, rail track ballast resistance on the conditions of the return current system breakdown. Particular attention is paid to the study of the breakdown voltage critical values on the spark gap in the return current circuit on the example of a railway section located in the Far East of Russia. Simulation results show that in addition to improving electrical characteristics, a positive effect of reducing asymmetry of the return current system for AC power traction network can be achieved by cleaning of the track ballast layer.
Features of Determining the Temperature Regime of the Drilling Wells in Permafrost
Authors: Timofeev N , Nikolaeva M , Atlasov R 
Published: June 2019

Abstract
Rational regulation of the thermal regime during wells drilling operations grows into an important practical task. Its successful solution largely determines the efficiency of the well construction and the fulfillment of its objective function.
Under the influence of both high positive and negative temperatures surrounding the rock well, various kinds of complications and accidents often occur during drilling and fastening of wells. Productivity of drilling operations is sharply reduced and drilling costs are increased.
When drilling various wells in areas of the Northeast and the Arctic zone of Russia with extreme natural and climatic conditions and a thick layer of permafrost the selection of optimal drilling tools and drilling technologies requires special requirements. Deposits of the permafrost zone have significant differences from analogs located in regions with a temperate climate and a positive temperature of rocks. Their specificity is due to the complex interaction and influence of mining-geological, permafrost and climatic factors. It has been established that the temperature factor determining the efficiency of the process of destruction and transportation of frozen rocks lies at the basis of the complicated conditions for rotary drilling of wells in permafrost.
Application of Petrochemical Heterocyclic Compounds as Corrosion Inhibitors
Authors: Gabitov A I 
Published: June 2019

Abstract
Theoretical concepts of inhibition mechanism in metal corrosion and forecasting of protective properties of substances are connected with experimental research of surface-active materials adsorption on metal surface. Application of petrochemicals, including intermediate products and petrochemical wastes for making new highly efficient and quite cheap corrosion inhibitors is promising. Research results of adsorption of some 1,3-diheterocycloalcanes-based compounds by method for measuring double-electric layer capacity appearing in “metal-electrolyte” interface in blank corrosion medium are reviewed herein. Therewith both blocking and energy effects of inhibitors are found to be the most efficient at first approach. Blocking effect is reducing area of metal surface affected by corrosion. Energy or ψ
1-effect occurs due to changing of double-electric layer structure in “metal-corrosion medium” interface. Adsorption results may be used to study corrosion inhibition mechanism by the analyzed compounds.
Research of Influence Preliminary Water Compression to the Processes of Methane-Containing Gas Mixtures Hydrate Formation
Authors: Em Iu M , Nikitina A V , Tiurin A N , Gulkova S G , Gulkov A N 
Published: June 2019

Abstract
Currently, the supply of a thermodynamic hydrate inhibitor (THI) increasing is the most common measure to prevent the formation of hydrates of gas transmission systems. It is proposed to improve the test procedure for calculating the consumption of inhibitors. By the method of Kinetic (K) and Hydrate Stability Zone (HSZ) the study of the formation and decomposition of gas hydrate phase was led in the mercury-free installation of GHA (Vinci Technologies, France). The moment of formation and decomposition of the gas hydrate phase is determined by the method of recording the pressure deviation from the reference one and duplicated visually.
The substance of the methane-containing gas mixture is determined by the results of the analysis using a chromatograph SHIMADZU GC 2014. The gas mixture as natural gas of the Yuzhno-Kirinskoye Gas Condensate Field is used in the studies as follows: Methane [CH4] 91.28%, Ethane [C2H6] 3.74%, Propane [C3H8] 1.61%, Carbon dioxide [CO2] 1.87%, Butanes [C4H10] 0.37%, [i- C4H10] 0.28%, Pentanes [C5H12] 0.04%, [i-C5H12] 0.09%, [neo-C5H12] 0.001%.
The measurements are carried out in the temperature range from -2°C to 20°C and pressures from 6 MPa to 11 MPa (930-1560 PSI). Cycles of the formation and decomposition of the gas hydrate phase are carried out in samples with water previously subjected to a pressure of 50 MPa and 10 MPa. The difference in experiments is described by the methods of Kinetics (K) and Hydrate Stability Zone (HSZ).
It has been established that during the calculation of THI concentration, it is necessary to carry out additional tests of samples of the gas mixture and water, which was subjected to the preliminary exposure to high pressure, to prevent hydrate formation. The formation of hydrates in such samples occurs earlier than in standard tests.
The increase in the incubation period of hydrate formation in repeated experiments with pre-prepared water indicates the flow of the equilibrium process of redistribution of the proportions of the cubic structures sI and sII. The process takes place in the system for a long time during several cycles of formation and destruction of the hydrate phase.
Security and Human Health Risk Assessment: Actual Problems
Authors: Nikiforova V A , Vidishcheva E A , Vidishcheva D D 
Published: June 2019

Abstract
This paper presents data on specific chemical risks observed in the urbanized areas of Irkutsk Oblast. The most important air pollutants in Bratsk are nitrogen dioxide, fluoride compounds, sulfur-containing substances, benzo(a)pyrene, and formaldehyde. The paper addresses the issues of assessing risks to human health when exposed to chemicals contained in the air of residential areas. We use the risk assessment methodology to quantify the non-carcinogenic and carcinogenic risks for specific population cohorts. It is found that when exposed to chemicals through inhalation, the risk of experiencing toxic effects is high. We hereby evaluate how specific contaminants affect the human health risks. The existing pollution level in the city’s administrative districts causes a high risk of respiratory diseases (HQ = 4.28), musculoskeletal diseases (HQ = 1.74), immunity disorders (HQ = 1.74), respiratory system disorders (HQ = 14.1), ophthalmological diseases (HQ = 9.7), physical and mental maldevelopment (HQ = 9.4); the total population-wide carcinogenic risk is found unacceptable (PCR = 1.8×10−3). It is demonstrated that the risk concept can be used as a methodological tool to substantiate the administrative decision-making with respect to environmental protection and technogenic security.
Designing for Manufacturing of the Closed Control System for Cars Waste Gases Neutralization
Authors: Solnitsev R I , Korshunov G I , Petrushevskaya A A 
Published: June 2019

Abstract
The process of end-to-end digital design of the closed control system for exhaust gas neutralization of cars proposed by the authors is considered. Known catalysts with heating, but without heating control are not effective enough to neutralize harmful exhaust gases. The system includes measurement means of gas concentration, control unit and standard units of the vehicle catalysis exhaust system, communication devices, GPS/GLONASS as elements of this control system. The stages of end-to-end digital system design from digital modeling of functions, schematic, design solutions oriented on selected production technologies are considered. Full or partial digital design of technological and production processes is provided. The principal novelty is the use of catalyst controlled heating, as well as the creation of assign vehicle units of the system for serial production. A computer program has been developed that simulates the stages of digital electronics production for environmental monitoring systems. The computer program contains elements of the cyber physical systems concept. The computer program is designed to ensure the quality of design and production efficiency. The knowledge base was built as ontological approach for supporting and updating information about the system with the ability to extract knowledge at the request of users is proposed. The input information for filling the knowledge base is formed on the basis of conceptual and constructive knowledge, as well as databases containing information about the system elements. The description of the knowledge base, the results of the development, possible ways of development are given.
Underwater Robotics Complex for Inspection and Laser Cleaning of Ships from Biofouling
Authors: Kostenko V V , Bykanova A Yu , Tolstonogov A Yu 
Published: June 2019

Abstract
The survey of an underwater part of ships is the mandatory procedure by rules of the Russian Maritime Register of Shipping. Periodic cleaning of the ship’s hull from biofouling increases efficiency of its motion. Inspection of the underwater part of the ship during afloat is currently carried out by divers with the underwater video system, devices for non-destructive testing of hull structures, and tools for cleaning surfaces from products of biological fouling and corrosion. The purpose of this study was to develop a new technical tool for remote surveying and cleaning of ship’s hull using a remotely operated vehicle (ROV) equipped with underwater laser cleaning equipment. The design of the vehicle for inspection and laser cleaning of ships has been developed during the research. The algorithms for trajectory controlling of the vehicle over the hull surface based on wheel and propulsion system has been proposed. The navigation data for the trajectory planning was received from combination of wheel and visual odometry. The proposed technical solutions allow the hull of the ship to be inspected and cleaned effectively and safely without being placed in the dry dock as well as to quickly assess the condition of the surface with the binding of the results to the ship’s drawing.
Thermogravimetric and Kinetic Study of Pyrolysis of Chlorine-Containing Medical Waste
Authors: Dudkina L M , Gerasimov G Y , Khaskhachikh V V 
Published: June 2019

Abstract
In this paper, the thermal decomposition (pyrolysis) of components of medical waste that consist of polyvinyl chloride (medical oilcloth and tubes of blood transfusion systems) is investigated. Thermogravimetric analyzes were performed in the TG-DTG mode on the synchronous thermal analysis device NETZSCH STA 449 F3 Jupiter. Based on the data obtained, the calculation of the kinetic parameters of the process of thermal decomposition of the investigated samples of medical waste was performed. For tubes of blood transfusion systems, experiments were conducted to absorb gases entering from the reaction volume in order to determine the temperature range of hydrogen chloride emission.
Research of Surface-Active Properties of Waste of Processing of Tin Ores
Authors: Rastanina N K , Chekmareva L I , Filimonov I Y 
Published: June 2019

Abstract
The object of research is the waste of enrichment of ories of the closed mining enterprise “Solnechny GOK” of the Khabarovsk territory of the Far Eastern Federal district. The article discusses the results of research of surface-active properties of waste of enrichment of tin ories due to their impact on the environment and public health. Sodium oxalate, trilon B, methylene blue, sodium humate were used as sorbates. Methods for the determination of interaction of waste with the sorbates – thermal effect and discoloration of colored complexing agents in the presence of the waste. Titrimetric methods were used to determine the number of reaction centers of waste. For to determine the nature of the active centers of wastes was use the extinguish of the foam generated by the anionic and nonionic surfactants. The influence of molar mass and structure of sorbates on the nature of their interaction with the waste surface is shown. High molecular polydentate complexing agent form a surface film. Low molecular weight sorbates contribute to the formation of soluble complexes of heavy metals and pollution of water systems. The revealed physico-chemical properties will allow to predict the increase in the probability of groundwater contamination by low molecular weight organic complexing agents and also probability of the best fixing of soils on waste in the presence of high-molecular organic substances of soil absorption complex.
Impact of Physical and Mechanical Characteristics of Snow on the Melting Process Intensity
Authors: Serebrennikov A A , Plokhov A A 
Published: June 2019

Abstract
The most economical decision to remove snow in big cities is using thermal snow melting facilities. Snow mass removal, taking place within them, is a complex stochastic process. Nevertheless, it’s necessary to have detailed description of melting metamorphism, allowing to get certain regularities, which could be basis of engineering calculations of geometrical and kinematic parameters of the facilities.
Methods and results of experimental studies, conducted with the purpose to find out dynamics of melting process depending on basic factors, effecting operational process: density of snow mass, grades of its pollution, temperature of heat carrier and character of its interaction with processed environment, have been narrated in the article. The received experiment results are foundation for physical modelling of operational process and getting criterion equations as dimensionless quantities for distribution of found relations for all the similar systems.
Regional Variability of Influence of Small-Scale Sound-Speed Fluctuation Levels on the Acoustic Fields Formation in the Ocean
Authors: Kiryanov A V , Salnikov B A , Salnikova E N , Slesarev N Y 
Published: June 2019

Abstract
The results presented herein are the research findings about the influence of small-scale inhomogeneity’s in water environment on the structure of acoustic fields for hydrological and acoustical conditions that are typical for the Atlantic and Pacific Oceans. Small-scale sound-speed fluctuations were modeled by adding a stochastic perturbation to the deterministic mean profile. Quantitative experiment was conducted to determine the dynamics of changes in the first three convergence zones at the depths of emission source in relation to the random componentry in the sound-speed field. Analytical dependences of increasing widths of upper convergence zones on the level of the random componentry in the sound-speed field were determined based on the results of quantitative experiment. With increasing stochasticity levels, the width of convergence zones increases in accordance with linear law, and the absolute increments grow with the increase of convergence zone number. When the values of a random componentry in the sound-speed field are fixed, the absolute increment of width of the upper convergence zones in the Atlantic Ocean is higher than in the Pacific Ocean. This said, the gradient of a smooth profile of the sound velocity by depth above the axis of hydroacoustic channel is higher in the Atlantic Ocean. Consequently, the absolute increments of width of the convergence zones depend not only on the levels of stochasticity parameters of water environment, yet, also, on the gradient size of smooth profile of the sound speed at depths above the axis of hydroacoustic channel.