bluuebunny/crossref_metadata_2025_split huggingface dataset:
Metrological support management quality assessment
Authors: Smirnova E E , Strizhova T A 
Published: November 2019

Abstract
The article presents data on assessing metrological support management quality based on the probabilistic approach. Assessing event probability can be additional important information in planning and analyzing complex processes such as metrological management. The analysis was carried out by comparing the requirements for metrological support with information about real situations. Requirements for metrological support are developed on the basis of regulatory legal acts, company management instructions, optimization of resource consumption, as well as taking into account company development prospects. To a large extent, the achievement of metrological support goals depends on management quality. The final step in assessing the quality of metrological support management is development of the results of assessment and formulation of conclusions (recommendations).
Improvement of the system of industrial environmental monitoring of atmospheric air in the area of anthropogenic arrays impact
Authors: Strizhenok A V , Korelskiy D S 
Published: November 2019

Abstract
Nowadays the waste management is one of the most pressing problems in the industry of mineral resources extraction and processing. The main method of waste disposal is storage on the surface of the Earth in the form of anthropogenic arrays. Anthropogenic arrays have an integrated and long-term impact on the atmospheric air. In this regard, the need for continuous monitoring of the state of atmospheric air in order to identify the main sources of dust emission and their quick elimination acquires particular relevance. This task can be performed by automating the existing system of industrial environmental monitoring. The article touches upon the issues of the implementation of the task of continuous monitoring of the dust content of atmospheric air in the areas of the anthropogenic arrays impact. The structure of the automated system of industrial environmental monitoring for the rapid detection of sources of intense dust emission, their ranking by the degree of potential danger and the measures for their timely elimination are proposed.
Ecological and economic justification of the utilization of associated petroleum gas at small oil fields of Russia
Authors: Strizhenok A V , Korelskiy D S 
Published: November 2019

Abstract
One of the main environmental problems in oil production in the world today is the utilization of associated petroleum gas (APG) by combustion it in flares. At the same time, this process has enormous economic damage, since APG is a potential raw material that can be used to produce marketable products, power or heat energy. More than 30 billion cubic meters of APG are combusted in flares annually only in Russia, which is about 20% of the total amount of combusted APG in the world. It should be noted that combustion of 1 billion cubic meters of APG is equivalent to the loss of marketable products worth more than 300 million dollars. In the present article, the authors carried out a selection of the optimal method for utilization of APG at small fields in Russia and its environmental and economic justification. The method of power generation directly at the field using gas turbine power station was adopted as the most cost-effective method. The implementation of such a project at the field reduces emissions of pollutants hundreds of times, and payback period does not exceed 2.5 years.
Accounting for the effects of third elements in the emission spectral analysis and construction of global analytical techniques
Authors: Sukhomlinov V S , Mustafaev A S , Popova A N , Koubaji H 
Published: November 2019

Abstract
The paper discusses the method of processing the metals and alloys spectra, which were obtained using emission spectrometers with spark excitation spectra. The proposed technique makes it possible to build a global method for analyzing any alloys, taking into account the so-called “third elements effects”.
Instrumental virtual tools for measuring random signal characteristics
Authors: Sytko I I , Smirnova E E 
Published: November 2019

Abstract
Based on modern computer technologies developed by National Instruments, a virtual device for adjusting, controlling and studying various noise characteristics has been developed. Signs helping identify the laws of random signal probability distribution are smoothness or sharpen-ing, asymmetry and uncertainty. Examples of identification of noise characteristics of elec-tronic devices are provided; instrument technologies are used to monitor the technical condi-tion of such devices.
Development of a local quasigeoid model for Vietnam land area using the global EGM2008 model
Authors: Son Tran Thanh , Kuzin A A , Mustafin M G 
Published: November 2019

Abstract
The article presents the results of research on the development of methods for obtaining normal heights in Vietnam using the global geoid model EGM2008 and software for processing GNSS measurements. The errors between the normal heights computed by the global model of the EGM2008 geoid and the heights found by GNSS measurements and geometric levelling on the territory of Vietnam are determined. The localisation method for the global geoid model EGM2008 for Vietnam’s territory is suggested, such a geoid model is practically formed as the EGM2008_ TN file. Tests of the developed technique and the localised model of the EGM2008__TN geoid were carried out, showing the possibility of its application to obtain normal heights from GNSS measurements in Vietnam with the 4th levelling accuracy class.
Validation of the method of height transmission by laser tape measure in construction
Authors: Son Tran Thanh , Kuzin A A , Mustafin M G 
Published: November 2019

Abstract
The article deals with the features of the use of laser tape measure for the transfer of heights from the Earth surface to the upper levels in civil engineering and to a mine in surveying. The most suitable engineering solution for the transfer of height to the mine is justified. Certain experimental results are presented. The algorithm that increases the accuracy of the transmission marks to the mine in the construction of deep tunnels is developed.
Automation of laboratory studies in the determination of the mass of mechanical impurities in petroleum
Authors: Serzhantova M P , Tynchenko V S , Bukhtoyarov V V , Bashmur K A , Tynchenko V V , Kukartsev V V 
Published: November 2019

Abstract
The article solves the problem of automated control of laboratory research process in determining the mass of mechanical impurities in petroleum. The research analyzed the features of the test and identified the need for an automated control system of this test. The developed automated system controls the filtering process of the sample and pump power, allows simultaneous parallel studies on independent suction lines, while optimizing the pump motor power, depending on the number of used lines. The article provides a block diagram describing the basic system algorithm and scheme of the laboratory tests automated installation in determining the mass of mechanical impurities in petroleum. The result is a reduction in the complexity of the study, optimization of laboratory research.
Similarity criteria for modeling the process of pipes pulse pressing into the tube sheet
Authors: Tynchenko V S , Petrovsky E A , Bukhtoyarov V V , Bashmur K A , Tynchenko V V , Kukartsev V V 
Published: November 2019

Abstract
In the presented article, the phenomena that characterize the essence of the process of fastening pipes to the tube sheet by the method of electropulse pressing are described. The article presents the results relating to methods and means of measurement, testing and operation of products in engineering, including theoretical studies of methods for fastening heat-exchange tubes into a tube sheet. The disadvantages of traditional methods of fastening pipes to the tube sheet are revealed. The analysis of the prospects of pipes electropulse pressing into the tube sheet is conducted. Using the dimensional analysis method, similarity criteria were obtained for the process of electropulse press-fitting of pipes into a tube sheet, which allow extending the results obtained on a reduced-scale model to products of natural dimensions.
Simple universal Kelvin equation valid in critical point vicinity, external-internal state correction, and their application in understanding of normal pentane capillary evaporation and condensation in mesoporous silica MCM-41
Authors: Valeev A A , Morozova E V 
Published: November 2019

Abstract
A new simple universal form of the Kelvin equation, which can be used near the gas-liquid phase transition critical point, and the correction of the pressure and density for gas phase fluid outside the porous medium are used for the normal pentane meniscus effective curvature radius calculation at the phase equilibrium in mesoporous silica MCM-41, on the basis of the capillary evaporation and condensation experimental data. Normal pentane is suggested as a promising fluid for characterizing the porosity that can be used even at room temperature.
Implementation of fuzzy logic in the smelting process of control algorithms of copper-nickel sulfide materials
Authors: Vasilyeva N V , Ivanov P V 
Published: November 2019

Abstract
The analysis of control quality of technological process of melting of copper-Nickel sulfide materials is carried out. The structure of the automatic melting control system is proposed, information and control channels are described. The algorithm of process control using fuzzy logic, which allows stabilizing the copper content in the matte within the specified limits.
Non-contact methods and means of measuring the oil film thickness on the water surface
Authors: Ushakov I E , Vinogradova A A 
Published: November 2019

Abstract
The article discusses options for solving the problem of ocean pollution by oil products. Currently, it is important to measure the thickness of an oil film to obtain information on the volume of spills and operations to eliminate them. The features of non-contact methods and the main characteristics and conditions of the use of means for measuring the thickness of an oil film are discussed. The accuracy of measurements in real conditions (in the presence of surface waves) was identified.
Noise immunity of signal demodulation procedure in binary coded communication channels with a frequency-position multiplexing
Authors: Vyboldin Yu K , Borisov S V 
Published: November 2019

Abstract
The article presents the algorithms for demodulating binary channels of data transmission lines with frequency multiplexing used in remote control and warning systems. The noise immunity of the algorithms were investigated. It is shown that significant simplification and significant noise immunity increasing can be obtained by applying the majority decision rule.
Nuclear magnetic resonance methods – the key to determining the structure of organic substances
Authors: Kuzhaeva A , Zgonnik P V , Anisimova N A 
Published: November 2019

Abstract
This article is intended to help an organic chemists and industrial engineers to choose a suitable method for the analysis of substances with complex structure and its control in industry. In the paper the current level of the NMR development and analytical abilities of the different NMR techniques is considered. It is noticed, that as a rule the results of the one-dimensional NMR are quite difficult to interpret in the case of a complex molecular structure. The main principles and different varieties of two-dimensional NMR techniques are described.
Presentation of distortion power in an alternating current network and analysis of factors of its occurrence
Authors: Myatezh S V , Novolodskiy M V , Kitova E T , Konyukhov V Y , Daudov I M 
Published: November 2019

Abstract
The article examines the conditions for the appearance of such components of inactive power in electric alternating current networks, which are known as reactive power and distortion power. Through simulation modeling, the validity of the expressions that were obtained analytically and determine the components of inactive power was verified. The validation of expressions based on theoretical concepts. The results are useful in optimizing modes in AC networks and creating effective technical means of compensating latent capacities.
Generalization of solubility of aromatic substances in supercritical fluid media with the use of entropy method of similarity theory
Authors: Bilalov T R , Gumerov F M , Neindre B Le 
Published: November 2019

Abstract
The results of generalization of the solubility of aromatic hydrocarbons in supercritical carbon dioxide using the entropy method of similarity theory are presented. The subject of generalization was the experimental data of various authors on the solubility of 11 substances studied in the temperature range from 300 to 350 K (total 823 experimental points and 57 isotherms).
Comparative study of scaling models related to thermodynamic properties of H2O in the critical region
Authors: Ustyuzhanin E E , Ochkov V F , Rykov S V , Rykov V A , Znamensky B E , Ya Tun Aung Thu 
Published: November 2019

Abstract
An analysis of some literary sources is made in the report. They contain data on thermodynamic properties (the liquid density (ρl
), the gas density (ρg
), the mean diameter, (fd
), the pressure (P) on the saturation line) of H2O. We have considered also scaling models, ρg
(τ, D, C), ρl
(τ, D, C) (Anisimov et al, 1990), here τ is the relative temperature, D = (α, β, Tc
…) are critical characteristics, (α, β) are critical indices, C are adjustable coefficients. A scaling model, P(τ, D, C), (Abdulagatov, 2007) is taken in account. These models meet the scaling theory of critical phenomena (ST) and work in the interval, τ = (0.002 – 0.012). We have paid attention to a model, fd
(τ, D, C), (Anisimov et al, 1990). It describes fd
, includes the leading component with (1 – α) index and is adapted to H2O. Another type of fd
(τ, D, C) is developed in this work. Our model is different from fd
(τ, D, C) (Anisimov et al, 1990). Its structure is combined and contains the leading component with 2β index. Similar combined scaling models have been developed too for properties (the order parameter, fs
, ρl
, ρg
, P). There are got numerical estimates of parameters those are related to functions (fd
(τ, D, C), ρg
,(τ, D, C), P(τ, D, C)) et al.) and based on (ρl
, ρg
, P, T) data, which are placed in the interval 3 × 10−3 < τ < 0.33 and related to the formulation IAPWS–IF 97 of H2O. The set of equations let us determine (ρl
, ρg
, P, T) values in the interval 10−5 < τ < 10−2 including the extrapolation region. A comparative study is performed: we have compared our numerical values with (ρl
, ρl
, P, T) data those are determined on the basis of the equation of state (the formulation IAPWS–IF 95). The difference between two data sets is analyzed.
An experimental study of the density of the helium – neon – nitrogen gas system at low temperatures
Authors: Milyutin V A 
Published: November 2019

Abstract
An experimental installation has been created at the Department of TOT to measure the density of ternary gas mixtures from 100 to 300 K and pressures up to 16 MPa. The experimental density for the He–Ne–N2 system is determined by the constant volume piezometer method. The amount of substance in the piezometer is measured by the volumetric method. He–Ne–N2 mixtures are prepared in a special mixer at 20°C for the p-v-T series of experiments, the concentrations are calculated using the equations of state of pure components. In the experiment, 3 mixtures were prepared, which had mole concentrations: (xHe = 0.24; xN2
= 0.17), (xHe = 0.33; xN2
= 0.34), (xHe = 0.16; xN2
= 0.60). 70 experimental points on 7 isotherms were obtained.
The method for constructing the fundamental equation of state for SF6
Authors: Kudryavtseva I V , Rykov V A , Rykov S V 
Published: November 2019

Abstract
The paper investigates issues related to construction of the equation of state which takes into account the peculiarities of substance behavior in the critical region and which is associated with the scalihg theory of critical phenomena. Construction method of a unified fundamental equation of state (UFEoS) for SFß that satisfies the power laws of scaling theory (ST) and the requirements imposed on the fundamental equations of state of the virial form (FEoS) is considered. UFEoS is based on a new representation of the scaling hypothesis in variables density – temperature and Benedek hypothesis. The authors have developed FEoS for SF6 in the range of state parameters: in density up to 2000 kg/m3, in temperature from 223.555 to 650 K. The authors have performed comparison with the certain fundamental equations of state for SF6: Scalabrin et al (2007 J. Phys. Chem. Ref. Data 36 617), Guder et al (2009 J. Phys. Chem. Ref. Data 38 33); Bezverkhii (2017 High Temp. 55 702). It is shown that in accordance with the requirements of ST, in contrast to the certain FEoS, the proposed equation of state transmits SF6 behavior into the vicinity of the critical point and in this region of state parameters significantly exceeds them in accuracy.
Thermophysical properties of high energy synthetic hydrocarbons
Authors: Yanovskiy L S , Varlamova N I , Kazakov A I , Molokanov A A , Plishkin N A 
Published: November 2019

Abstract
The vapor pressure, enthalpy and entropy of evaporation, boiling point and critical parameters of four synthetic frame and spiranic hydrocarbons of interest for use as aircraft synthetic fuels or their components have been investigated
Equations for calculation of liquid-vapor equilibrium in binary mixtures containing methane
Authors: Vasserman A A , Galkin V N 
Published: November 2019

Abstract
Equations describing the experimental data on liquid-vapor equilibrium in binary mixtures of methane with argon, carbon dioxide and helium have been compiled. The equations describe the dependence of pressure of liquid or vapor on temperature and composition. When compiling them, the program selected most significant coefficients of the equations. The standard deviations of experimental values of pressure from the calculated values range from 1.8 to 5.0%. The equations make it possible to determine the composition or temperature of the phases at known values of other parameters of phase equilibrium.
Fundamental equation of state for R1234yf
Authors: Rykov V A , Rykov S V , Sverdlov A V 
Published: November 2019

Abstract
Unified fundamental equation of state for R1234yf has been developed that satisfies the scaling critical point theory. It has been demonstrated that the proposed equation of state truly represents the peculiarities of the thermodynamic surface from the qualitative and quantitative point of view: first, in the regular part of the thermodynamic surface, secondly, in the region of strongly developed density fluctuations. The operating range of the equation of state has been determined on the basis of the benchmarking analysis with experimental and estimated data: for temperature 230 ≤ T ≤ 420 K; for pressure 0.001 < p < 20 MPa.
On round dates, acute issues and solving problems of low-parametric equations of state by logical abduction
Authors: Petrik G G 
Published: November 2019

Abstract
Within the framework of a simple molecular thermodynamic model, the problems of comparing equations of state (EOS) and the choice of analogs in three sets are analyzed: equations based on the model of interacting point centers, van der Waals type equations, and Martin equations derived from volume translation. A method for the selection of EOS was proposed and approved by calculating the critical isotherms Ar and C4F8. According to the results of the PV calculations, the selected EOSs turned out to be better than known those of Peng-Robinson, Martin, Redlich-Kwong. On the basis of a new characteristic of the equation, a parameter comparing the configuration contributions, a method has been proposed for choosing EOS-analogs in different families. An explanation is given for the impossibility of describing equally well with one equation two states with a reduced density of 2 and 3/2. The results obtained for the EOS of the new model confirm its adequacy in full accordance with the method of abduction.
Calculation of thermophysical properties of binary helium-based gas mixtures
Authors: Kochurov D S , Eletskiy I A , Kotova E S 
Published: November 2019

Abstract
A modified methodology for calculating thermophysical properties of binary helium He based mixtures with a heavier gas component is presented. To obtain the properties of the pure components and mixtures in the limit of zero density, the most recent ab initio calculation results and modified mixing rules are implemented. To calculate the properties at high pressures, the extended laws of corresponding states are used. A verification procedure was carried out, and the results are presented for deviations of calculated thermal conductivity λ and dynamic viscosity μ values from available experimental data for mixtures He-Ar and He-N2 at temperatures from 183 K up to 603 K, and pressures up to 10 MPa. It is shown that in the considered range of thermodynamic parameters the deviations of the calculation results from the experimental values are less than 3 % for λ and less than 2 % for μ.
Maxwell factors for gaseous 2.3.3.3-tetrafluoropropene and cis-1.3.3.3-tetrafluoropropene at zero density
Authors: Tsvetkov O B , Laptev Yu A , Prostorova A O , Vinzarevich A V 
Published: November 2019

Abstract
In this study we focused on the Maxwell factor of fluorinated propene isomers 2.3.3.3-tetrafluoropropene and cis-1.3.3.3-tetrafluoropropene last years receiving considerable attention as the next generation of refrigerants. Fluorinated propene isomers contain carboncarbon double bound. The advantage of both refrigerants is a low global warming potential value of 4 and 6 respectively. This paper deals with the temperature dependence of thermal conductivity in the limit of zero density for dilute gases. A theoretically based correlation formalism has been examined according to the kinetic theory of Mason–Monchik–Parker using a set of trial functions and related to the translational and integral effective collisions that incorporate the information concerning intermolecular pair potential and binary collisions. The results have correlated using the Maxwell factor. The analysis of quantities for practical purposes which are related to the thermal conductivity and viscosity has been made.
Thermodynamic assessment, screening and trade-offs in alternative working fluids selection for refrigeration, heat pumping and organic Rankine cycles
Authors: Mitropov V V , Tsvetkov O B , Laptev Yu A , Babich A Yu 
Published: November 2019

Abstract
Global warming and ozone depletion are leading effects attaching the consideration of environmental organizations. Conversion to alternative hydrofluorocarbons (HFC) refrigerants without chlorine atoms progressed over the last two decades. However recently because of the significant global warming impact of HFCs the hydrofluoroolefins (HFOs) were proposed as new generation alternative refrigerants. This article discussed fluorinated propene based isomers, summarizes refrigerant numbering scheme, flammability, fundamental parameters and thermodynamic properties of isomers containing five-, four- and three-fluorine atoms respectively. In the present study evaluated the refrigerant performance in an idealized vapor compression refrigeration cycle. Presented HFC and HFO blends as non-flammable refrigerants with relatively low global warming potential values.