bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effect of fast crystallization ligature modification on the microstructure of aluminum alloys
Authors: Cherepanov A I , Kukartsev V A , Tynchenko V S , Kukartsev V V , Semenova E I , Aponasenko S V , Bashmur K A 
Published: May 2020

Abstract
One of the ways to improve the mechanical and technological characteristics of aluminum alloys is to introduce modifiers into them, which are divided into two fundamentally different groups. Modifiers of the first kind, which have proven themselves to be positive, include elements such as Ti, Zr, B, Sb. Their addition to the alloy is up to 1% (wt.). Recently, studies have been conducted on the use of powder modifiers: boron carbide, silicon carbide, nitride or titanium carbide and other modifiers. Modifiers of the second kind include sodium, potassium and their salts. The disadvantage of these low-melting modifiers is that after processing the melt with them, the modification effect disappears after 30-40 minutes due to evaporation and oxidation of sodium.
Control of the process of wear of the tribosystems based on the optical density of the lubricating oil using neural network models
Authors: Shram V G , Agafonov E D , Orlovskaya N F , Vashchenko G V , Egorov A V 
Published: May 2020

Abstract
The article considers the task of studying how the two processes relate - the destruction of lubricating oil and the wear of the elements of the tribosystem. The paper analyzes one of these indicators - the optical density of the oil, which characterizes the process of its destruction. The study includes the stage of constructing multifactor intelligent critical wear models depending on the optical density of the oil and the effort in the friction pair. The initial data for the construction of models are the results of measurements of the optical density of oils and the diameter of the wear spot. The obtained forecast models are indispensable for explaining the fundamental processes of wear that occur during the operation of lubricating oil. In addition to this, it should be noted that the results obtained make it possible to take the next step towards the creation of a new technique for the rapid assessment of the state of lubricating oil and the corresponding nature of the process of wear of the tribosystem.
Mathematical models of beam input and output in the process of electron beam welding of thin-walled structures
Authors: Kurashkin S O , Tynchenko V S , Seregin Yu N , Petrenko V E , Milov A V , Murygin A V 
Published: May 2020

Abstract
The article considers the problem of mathematical modeling of the electron beam welding process at the stages of input and output of an electron beam. A conceptual model is proposed, developed using the mathematical apparatus of the thermal process theory. The models allow the calculation of the individual stages of the process that affect the formation of a welded joint in the vicinity of the “zero point”. The proposed models will be used in the future and will be subjected to verification processes by comparison with the results of field experiments.
Design development and evaluation of the efficiency of the regular separation pack
Authors: Afanasenko V G , Kulakov P A 
Published: May 2020

Abstract
Practically all enterprises of gas and petrochemical industry use separation packs, which can be used as separators and as be an element of heat of mass exchange equipment. The article presents the design of a regular separation pack composed of corrugated metal sheets, as well as the method of measuring its main technological parameters using the finite element method. Dependence of energy consumption and separation quality on design features of the pack is established.
Concept of a new method for continuous non-destructive control of asphalt road pavements compaction
Authors: Prokopev A P , Nabizhanov Zh I , Emelyanov R T , Ivanchura V I 
Published: May 2020

Abstract
The article deals with the research results of a concept for a new method of continuous non-destructive control of asphalt road pavements compaction based on the analysis of the vibration and force state of working bodies of road construction machines as well as the corresponding algorithm for data conversion and intelligent prediction of compaction quality. The definition of the concept “cyber-physical road construction system” is proposed. A scientific problem as well as the corresponding purpose and objectives of the study are formulated. The theoretical background of the continuous compaction control method for pavers is considered. The structure of the considered cyber-physical road construction system is determined.
Automated measurements in process monitoring system in bearing production
Authors: Ignatiev A A , Dobryakov B A , Ignatiev C A , Kazinsky A , Nasad T G , Nasad I P 
Published: May 2020

Abstract
The methodological foundations of the use of automated measuring systems in the monitoring system of the technological process of manufacturing parts of bearings are considered. In addition to the means used to control the accuracy of manufacturing of bearing rings, the use of vibration measuring instruments to assess the dynamic quality of each grinding machine, automated eddy-current quality control devices for the surface layer of parts, and an active dimensional control system, the functions of which are expanded by controlling the speed of the removed stock, are considered. All information is processed in a monitoring system and used to improve the quality of bearing parts.
Joint influence of the wheel group on vehicle motion parameters
Authors: Baranov A S , Pavlyuk A S 
Published: May 2020

Abstract
In order to reduce the complexity of researching the dynamics of vehicles with various structural schemes of the “wheel-road” system, the authors recommend a conditional replacement of several wheels on the same axle or on different axles with one equivalent wheel having the dynamic properties of the wheels being replaced. The article considers the case of an arbitrary wheel arrangement and the possibility of making the design scheme more compact. The calculation is carried out relative to the moving coordinate system, rigidly connected with the link frame and having the ability to move parallel to the supporting surface. Based on the analysis of the obtained dependencies, methods are proposed and recommendations are developed for bringing various structural patterns of wheel arrangement to one equivalent wheel.
Using natural and technical systems of the Leningrad region for waste disposal
Authors: Epifancev K 
Published: May 2020

AbstractNatural-technical system – a complete, ordered spatially-temporal relationship between natural and industrial objects. These are landscape parks created by high-level designers, landfills created by engineers of giant enterprises and unique swamp, self-cleaning unique resources. The first, second, and third in this case is the result of the interaction of the elements “nature” and “technology” as a whole. Interaction is manifested in a variety of technical, geological, hydrological, atmospheric and biological processes.
Study of heat transfer in the disk of a regenerative crystallizer
Authors: Kovshova Yu S , Yu Krasnichkov D , Bayazitov M I 
Published: May 2020

Abstract
The study is devoted to the research of the heat transfer process at different numbers and locations of labyrinth passages of the regenerative mold disk design by numerical modelling. The designs of the cooling disk with 6, 12 and 18 labyrinth passages are considered. It was found that the number increasing of labyrinth passages to twelve passages allows increasing the average heat transfer coefficient by 1.3 times and providing 2-fold increase in the uniformity of heat transfer. Analysis of the dependence of heat transfer in a disk with twelve labyrinth passages on the refrigerant flow showed that the greatest uniformity of temperature distribution over the disk surface is achieved when the refrigerant flow rate is 100 m3/h. An equation for the dependence of the average heat transfer coefficient from the refrigerant to the disk wall on the flow rate is obtained. It can be used to find the required flow rate of the refrigerant in order to achieve a certain average temperature when regulating the crystallization process. Thus, an improved version of the cooling disk design is proposed for the regenerative disk type mold, which provides a more efficient heat transfer compared to existing analogues, which is confirmed by the results that were obtained.
Overview of turbogenerator monitoring and diagnostic systems
Authors: Polyakov R N , Krupenin N V , Kudryavcev I E , Belyaev A V , Belyaev I V , Romanov V V , Stebakov I N 
Published: May 2020

Abstract
The article considers general approaches and modern monitoring systems for rotary machines of electric generating equipment. The main characteristics of monitoring and diagnostics systems of Russian and foreign manufacturers are presented. Modern trends in the construction of intelligent systems for analyzing the performance of turbo generators and predicting possible failures in order to minimize the cost of repairs and forced shutdown of equipment are outlined. The concept of adaptive-predictive use of rotary machines, the difference from existing systems is the presence of adaptive module that allows to react to unwanted changes in real time and increase the predicted residual resource or eliminate the predicted probability of initially refusal.
Model to improve the quality of additive production by forming competencies in training for high-tech industries
Authors: Chabanenko A V , Kurlov A V , Tour A C 
Published: May 2020

Abstract
Modern trends and technologies of high-tech production are aimed at the active application and use of additive technologies in the production of complex industrial products of non-standard shape. The problem of complicating the design of products is acutely felt. Working with additive technologies requires special competencies of personnel capable of working in high-tech industries in modern digital production.
Theoretical study of forest fire extinguishing machine use
Authors: Gnusov M A , Drapalyuk M V , Yu Druchinin D 
Published: May 2020

Abstract
Nowadays, forest fires have become a serious problem for many countries. The world forestry suffers losses. This fact encourages scientists from different countries to actively engage in the development of new forest firefighting equipment, but the creation process is becoming more and more expensive. The simulation method has become increasingly used to increase the efficiency of the equipment creation. For a theoretical issue the simulation model of firefighting machine for extinguishing forest fires has been developed, which allows carrying out computational experiments on the forest fire unit functioning. The model implementation in the form of different computer experiments allows us to establish the influence of the structural and technological parameters of the forest fire machine on the efficiency of soil throwing during the forest fire extinguishing.
Modern technological trends in the development of the ecosystem of cargo UAVs
Authors: Kovalev I V , Voroshilova A A 
Published: May 2020

Abstract
Trends in the development of the ecosystem of cargo UAVs are considered. This ecosystem has appeared in the aviation industry, including civil unmanned aerial systems manufacturers and their components, software developers, integrators, UAV-based service providers, insurance companies and trading platforms. The architectural concept of unmanned aircraft system traffic management is discussed.
Analysis of permafrost conditioning in the oil field
Authors: Feodorov A B , Egorov A V , Pavlova P L , Sviridov L I , Zagorulko V N 
Published: May 2020

Abstract
Based on model concepts, the technique of maintaining the stability of the permafrost layer is analyzed. An injection well is considered as a reference channel for injecting a mixture of liquid and gas. The purpose of this technology is to control the flow of heat. The development of hydrocarbon deposits in the extreme north requires the preservation of perennial frozen soils in a stable solid state. Stable condition of frozen soils is a guarantee of well operability. An injection well is used to inject refrigerant into the frozen soil zone. When using packers to separate said portion, the injection process to maintain reservoir pressure may continue in the usual manner. Permanent frozen soils are conditioned using a mixture of liquid and gas. This mixture allows you to control the parameters of temperature, pressure and heat capacity over a wide range. The directions of the mixture are formed using a packer system. Packers are installed in the tubing and in the annulus. The formation of a coolant agent is organized directly in the well above the working formation. The technique of ejector pumps is used. The ejector is a device for controlling the parameters of the mixture. The components of the mixture are fed through columns (pipes). The organization of the movement of components is considered as an additional degree of freedom. The proposed technology allows you to use an additional option for the operation of the existing layout of wells in the oil and gas field. The usual practice of the operation of the fishery may remain unchanged.
Statistical study of the impact of climate warming on productivity
Authors: Zinchenko A P , Tarasova O B , Pyzhikova N I 
Published: May 2020

Abstract
The global warming had a significant impact on agriculture in Russia over the past decades, what causes an urgent need for scientific analysis of warming impact on agriculture production and its efficiency. On the example of published data concerning weather conditions of grain crops cultivation in Tambov Region, methodical questions of statistical estimation of their influence on the level and variation of productivity are considered. Within the framework of metrological support, techniques are offered for constructing the qualitatively homogeneous time series of productivity and climate factors, alignment of rows and assessment of the degree of influence of air temperature and precipitation during the vegetation period on the productivity based on the correlation analysis of deviations of characteristics from the aligned series. It is recommended to use the offered approaches as the metrological support for the analysis of dynamics of productivity in all subjects of the Russian Federation, and differences in the level of productivity between them.
Performance-increasing technique in micromechanical accelerometer development
Authors: Yu Ershov D , Lukyanenko I N , Aman E E 
Published: May 2020

Abstract
Requirements for higher-performance on-board control systems and instruments applied in a variety of small-scale moving objects results in the necessity to develop micromechanical sensors – small, lightweight, energy-efficient and, at the same time, offering high-reliability performance and easy-to-use. Development of such MEMS will require – in its turn – controlling parameters which determine the quality of the sensor. These strictly-controlled parameters will most immediately influence the desired outcomes and underlie more efficient use of resources to achieve the desired aims. The problem discussed has already been studied by many scientists. MEMS have been and are being developed by both Russia-based and foreign companies like Honeywell International Inc., Analog Devices Inc., JSC Radar MMS, Temp-Avia plc., to name a few.
Design of encoding and decoding devices in infocommunication systems with orthogonal coding
Authors: Rabin A V 
Published: May 2020

AbstractThe orthogonal coding, which is developed by the author, allows providing the needed communication quality with a smaller power cost. The signal-to-noise ratio’s energy gain is ensured by an effective use of transmitted signals’ power with the unchanged code rate, without an increase of complexity and cost of transmitting and receiving devices. The orthogonal coding is the analogue of convolutional coding over the rational numbers’ field. Properties of orthogonality of proposed codes allow to strengthen the significance of useful signal with simultaneous weakening of the influence of AWGN. Method of the encoding and decoding devices’ design and the example are considered in details. The practical realization of the orthogonal coding has a low level of complexity: each step of the decoding process is technically reduced to a several dot products’ calculation and, consequently, to a contrasting to the zero. For this reason, the offered way of coding and design of encoding and decoding devices can be implemented in various infocommunication systems.
Signal protection methods in channels with Nakagami fading
Authors: Rabin A V , Lipatnikov V A , Kuzin P I 
Published: May 2020

AbstractExisting methods for modeling the quality of digital communications based on adaptive radio links usually assume the stationarity of the parameters of the investigated system and the method of frequencies’ group use. The possibilities of these methods are largely limited due to the complexity of calculating the posterior distributions of a hypothetical environment that occurs when a signal is received. As a result of this, at present, in engineering practice, there are few models that make it possible to evaluate the quality of quasicoherent reception of adaptive radio lines even in simple situations of orthogonal signals’ transmitting. The goal of this research is to develop a way to increase the noise immunity of communication in channels with fading under the Nakagami distribution law. Analytical dependences of the error probability and the radio link utilization coefficient on the permissible signal-to-noise ratio were obtained using intermittent communication in channels with fading according to the Nakagami distribution law. The method was developed to increase the noise immunity of communication in comparison with known reception methods. For example, with the fading depth 1.4, for the error probability 10–4, the energy gain will be more than 14 dB. The proposed method can be used to provide electronic protection in various communication systems.
Theoretical basis for measuring and compensating for deviations of ship pipelines at the design and installation stages
Authors: Ngo G V 
Published: May 2020

Abstract
In this article, the author considered the problem of increasing technological efficiency of the pipelines of ship systems at the design stage and presented the way of manufacturing and assembling of ship pipelines without measuring at the ship. For that, the author created the theoretical basis for measuring and compensating for deviations of ship pipelines at the design and installation stages. There has been done the analysis of standardized deviations controlled in the process of pipe manufacturing according to the drawings. The article reveals the reasons making inappropriate the technology of manufacturing pipes according to the project documentation by the method of bending. The reasons of deviation development and amount of deflection from structural dimensions that arise during the pipe manufacturing have been determined.
Statistical metrics for providing the population with drinking water of standard quality
Authors: Parshukov D V , Shaporova Z E , Yu Koloskova I 
Published: May 2020

Abstract
The problem of providing the population with drinking water is global in nature and is one of the main tasks for civilization in the long term. It is necessary not only to provide the population with water, but also to meet the regulatory requirements for hygienic, microbiological and sanitary-chemical standards. This article presents the results in statistical studies of drinking water quality for rural population. Object of research is water supply systems in rural areas of the Krasnoyarsk territory. Main research methods are descriptive statistics, Bootstrap method, and correlation and regression analysis. Based on the application of these methods statistical metrics of drinking water quality from various sources of water supply are identified, and a statistical relationship between the drinking water quality and the health of the rural population for the first time registered diseases of the digestive and endocrine systems is described. The most acute problem is the unsatisfactory condition of water supply facilities, the quality of water from underground and surface sources of centralized water supply, as well as from distribution networks.
Laws of environmental protection in Vietnam - Situation and solutions
Authors: Chu X D 
Published: May 2020

Abstract
Research the current situation of Vietnam’s environment. Researching the real situation of the law on environmental protection: the achievements of the law on environmental protection; Current issues raised in the regulation of environmental protection legislation. Proposing and proposing major solutions to perfect the environmental protection legislation in the coming time: perfecting the environmental protection legislation; complete the national standards and technical regulations on environment; complete the regulations on environmental impact assessment; complete the regulations on waste management, especially those in urban and industrial areas; complete the regulations on environmental protection of soil, water and air; issue documents specifying the process of publication and democratization of environmental protection activities.
Modeling of the operation modes of the electric power system to improve its sustainability of functioning
Authors: Shishlakov V F , Ya Solenaya O , Solyonyj S V , Rysin A V , Kvas E S , Kuzmenko V P 
Published: May 2020

Abstract
the factors affecting the increase in the static and dynamic stability of electric power systems are investigated. The modeling of the operating modes of the complex-closed power supply circuit was carried out using the DIgSilent PowerFactory software and computing system. The scheme of the electric power system with the optimal configuration and technical parameters, corresponding to the standards for ensuring the quality of electricity, was developed.
At scale, renewable natural gas systems could be climate intensive: the influence of methane feedstock and leakage rates
Authors: Grubert Emily 
Published: May 2020

Abstract
Renewable natural gas (RNG) is a fuel comprised of essentially pure methane, usually derived from climate-neutral (e.g. biogenic or captured) carbon dioxide (CO2). RNG is proposed as a climate friendly direct substitute for fossil natural gas (FNG), with the goal of enabling diverse natural gas users to continue operating without substantial infrastructure overhauls. The assumption that such substitution is climate friendly relies on a major condition that is unlikely to be met: namely, that RNG is manufactured from waste methane that would otherwise have been emitted to the atmosphere. In practice, capturable waste methane is extremely limited and is more likely to be diverted from a flare than from direct atmospheric release in a climate-conscious policy context, which means that RNG systems need to be more destructively efficient than a flare to provide climate benefits versus the likely alternative management strategy. Assuming demand levels consistent with the goal of using existing FNG infrastructure, RNG is likely to be derived from methane that is either intentionally produced or diverted from a flare, so essentially any methane leakage is climate additional. Further, in a decarbonizing system, RNG will likely compete with lower-emissions resources than FNG and thus provides fewer net emissions benefits over time. Anticipated leakage is climatically significant: literature estimates for methane leakage from biogas production and upgrading facilities suggest that leakage is in the 2%–4% range (mass basis), up to as much as 15%. Policy makers should consider that under reasonable leakage and demand assumptions, RNG could be climate intensive.