bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of the application for the magnetohydrodynamic effect in the hydrocarbon production
Authors: Logunov A V , Kopyrin V A , Portnyagin A L , Deneko M V 
Published: January 2020

Abstract
Nowadays the main share of oil fields is at a late stage of operation. It is characterized by high water cut of the extracted products. Salts in the formation fluid, under certain thermobaric conditions, settle on the process equipment and they cause its failure. Failure of technological equipment entails the well’s downtime and high material costs. Water-soluble salts in the formation fluid are subject to electrolysis. There, the molecules of the substance are decomposed into ions. The Lorentz force acts when a magnetic field is applied to the ions. The magnetohydrodynamic effect is manifested in the formation fluid. The purpose of the article is to analyze the applicability of the magnetohydrodynamic effect for hydrocarbon production. The chemical composition of formation waters for some deposits is given. On its basis the chemical model for electrolysis of the main salts in sodium chloride and potassium chloride contained in the formation liquid is constructed. The design and operation principle of the simplest magnetohydrodynamic pump is considered. The description of the developed laboratory sample of the magnetohydrodynamic pump is given. The main conclusions are reflected in this article.
The operating conditions of the internal combustion engine with high temperature cooling
Authors: Razuvaev A V , Slobodina E N 
Published: January 2020

Abstract
This paper presents the analysis of the experimental data on the cylinder bushing and 21/21 engine piston temperature level, as well as the possibility of converting the engine operation mode to the high-temperature cooling mode. The power plant bench tests results confirming the efficiency of the engine with high-temperature cooling mode are represented.
Furnace chamber heat exchange peculiarities in using different types of coal
Authors: Slobodina E N , Stepashkin I A , Mikhailov A G , Semenov B A , Kikhtenko V A , Shalay V V , Vdovin O V 
Published: January 2020

Abstract
The paper considers the types of heat transfer in the furnace chamber and ash residue values influence on the heat released and received in the furnace. The influence of different grades of coal (Kamyshanskij, Taldinskij and Ekibastuzkij deposits) with ash residue value from 16.4 to 43 % on the furnace combustion heat was analyzed. The ash residue value influence on the value of the heat received in the combustion chamber, which is the boiler efficiency defining characteristic, is considered. The graphical dependence of the heat amount received in the combustion chamber on the ash residue for the different types of solid fuel is shown.
Simulation of the electric starter system of the internal combustion engine start-up to study the impact on its operation of the pre-start battery discharge
Authors: Zhuravsky B V , Zanin A V , Kvasov I N 
Published: January 2020

Abstract
The article is devoted to the actual problem of starting an automobile engine in conditions of low negative temperatures. To increase the likelihood of starting the engine when using autonomous means of pre-heating, it is necessary to optimally distribute the battery energy to the pre-start and start-up discharges. As a part of the creation of a system, an automated pre-start thermal preparation of an automobile engine the need arises to conduct research on the influence of the battery starting-up discharges on the parameters characterizing the functioning of the electric starter system.
Research methods. A mathematical model of the electric starter system for starting the internal combustion engine is presented. The model is implemented using the software Mathcad 15.
Results. As a result of the simulation of the start-up system, the dependencies of the crankshaft rotation speed on time have been obtained for various values of battery discharge and temperature. According to the frequency of rotation of the crankshaft and the coefficient of dynamism of the battery discharge and the temperature of the electrolyte are also derived.
Findings. As a result of analyzing the data obtained in mathematical modelling it was determined that with decreasing electrolyte temperature the effect of the pre-discharge of the battery on the rotational speed of the crankshaft increases significantly. The ratio of the maximum rotational speed to the rotational speed of the crankshaft at the end of the start-up is almost independent of the degree of the battery discharge.
Software development and hardware means of hidden usb-keylogger devices identification
Authors: Barankova I I , Mikhailova U V , Lukyanov G I 
Published: January 2020

Abstract
Identifying keylogger is a simple task implemented by analyzing program code and identifying suspicious activity. The keylogger identification made as a technical device is a difficult operation in connection with hiding the electromagnetic fields of such devices. Therefore, the implementation of a firmware module for detecting hidden USB-keylogger devices is very relevant at present. The article presents the technical modules and block diagram of the developed device. An algorithm for detecting hidden devices is demonstrated and the analysis of the device operation is done. Conclusions and recommendations for identifying hidden keylogger devices were formulated.
Vector key pre-distribution scheme
Authors: Belim S V , Belim S Yu 
Published: January 2020

Abstract
In article the keys preliminary distribution scheme using calculations in the any vector space is suggested. The secret information is generated on the server as linear operator. The linear operator has to be the symmetric. The open vector is compared to each user. Key materials are calculated by the server based on the secret linear operator and open vectors. Key materials are transferred to users via a secure channel. Pair keys are calculated based on open vectors and key materials. Two vector spaces are considered. The first case is space over Zp. The linear operator is a square symmetrical matrix. Restrictions for the matrix size are received. It is shown that the Blom’s keys preliminary distribution scheme is a special case of this scheme. The second case this vector space of smooth functions. Secret is defined by the linear differential operator. If to be limited to final basis, then the second case comes down to the first.
Noise proof coding based on orthogonal functions
Authors: Belim S V , Larionov I B 
Published: January 2020

Abstract
In article the encoding scheme for messages with use a family of orthogonal functions is suggested. For coding the message, the waiting sum of orthogonal functions is used. Weight coefficients are formed from bits of the transferred message. The received function is transferred on a communication channel as analog signal. For decoding the message, the orthogonality property is used. Integration is carried out numerically. Existence errors of decoding depends on accuracy of a numerical integration. This scheme allows to transfer messages on strongly noisy channels. At increase in noise level it is necessary to increase accuracy of an integration. The computer experiment is made. The dependence a step of a numerical integration on noise level is received.
Optimization electric field sensor sensitive electrodes of cylindrical form
Authors: Biryukov S V , Kolmogorova S S , Kolmogorov A S , Baranov D S 
Published: January 2020

Abstract
The article researches into single-axis and two-axis electro-induction cylindrical sensors of electric field strength of various designs. The aim of the research in the article is to conduct a comparative analysis of these sensors from the point of view of the error in an inhomogeneous electric field with a high degree of heterogeneity and to identify their design parameters, the optimization of which could lead to a decrease in this error and the expansion of the spatial range of measurements. As a result of the study, the objective functions of the sensor error were obtained for the first time, which made it possible to optimize their design parameters and establish: 1) the optimal size of the sensitive electrode of the single-coordinate sensor is θ
0 = 53.5°, and the sensor error does not exceed ± 2% in the entire spatial measurement range 0 ≤ ≤a <1; 2) two-coordinate sensors with the same error have only technically acceptable angular dimensions of the sensitive electrodes, respectively, for version 1 - θ
0 = 45°, for version 2 - θ
0 = 90°. The sensors in version 1 have a positive, and in version 2 a negative error in the spatial measurement range 0 ≤ a <0.25, while the sensors in version 1 have a higher sensitivity. With approximately equal metrological characteristics, sensors with higher sensitivity should be selected. The practical goal of research is the possibility of sound design solutions to improve the metrological parameters of universal sensors used in electrometer devices for various purposes.
Multu-electrode sensors of the components of the electric field intensity vector in the form of the disk made of conductive material
Authors: Biryukov S V , Kolmogorova S S , Kolmogorov A S , Baranov D S 
Published: January 2020

Abstract
The article investigates a multi-element disk sensor of the components of the low-frequency electric field intensity vector, manufactured using new technologies. The sensor is suitable for measuring the intensity of electric fields adversely affecting a person. In this regard, the problem solved in the article is relevant. The results of the study made it possible to create such a sensor, evaluate its metrological characteristics and establish their dependence on the degree of homogeneity of the electric field. The established relationship between the sensor error and the degree of heterogeneity of the electric field makes it possible to determine the spatial range of measurement from a given error or to establish the sensor error from a given spatial range of measurement. For example, a sensor error of 3% corresponds to the spatial measurement range a, determined by the distance to the field source from 0 R to 5·R (a ≤ 0.2), where R is the radius of the disk of the base of the sensor.
Classification of the factors causing the change of the optical fiber strain by using the Brillouin reflectograms
Authors: Bogachkov I V 
Published: January 2020

Abstract
A classification of the factors causing the change of the optical fiber strain by using the Brillouin reflectograms is considered.
The differences of Brillouin reflectograms with strain along the optical waveguide are discussed under various impacts: temperature and mechanical longitudinal stretching.
Reference Brillouin reflectograms for different kinds of optical fibers from the database are capable of improving a process of classification of potentially hazardous sections (sections of optical fibers with high mechanical strain or changed temperature) in the optical fiber.
The results presented in this paper allow us on the basis of the analysis of Brillouin multi-reflectograms to identify a factor that has a predominant impact on the fiber strain in the investigated sections of the optical fibers in fiber optical communication lines.
A Markov model for optimization of information security remedies
Authors: Kasenov A A , Kustov E F , Magazev A A , Tsyrulnik V F 
Published: January 2020

Abstract
The problem of selecting an optimal collection of security remedies against a specified set of cyber threats is relevant as far as there is a wide range of different cyber security solutions in modern IT industry. The aim of this work is to formulate an optimization problem for selecting information security remedies using a Markov cyber threat model and to analyze the possibility of solving the problem by the method of sequential analysis of variants. The set of solutions for standard approaches is limited by admissible indicators of the economic damage, and the corresponding restriction by means of a functional and temporal characteristic of the model called its average lifetime is defined. The explicit analytical formula for the average lifetime of an information system expressed in terms of the original parameters of the model is obtained, these parameters being the probabilities of threat occurrence and probabilities of their eliminations by security remedies. The possibility of solving our optimization problem by the method of sequential analysis of variants is analyzed. The program in C++ is developed to experimentally compare the effectiveness of this method compared with the "brute-force" method.
Modeling the influence of the optical fiber strain on the readiness performance of fiber-optic communication lines
Authors: Lutchenko S S , Bogachkov I V 
Published: January 2020

Abstract
A mathematical model for determining the readiness performance of the fiber-optic communication lines depending on the degree of optical fiber strain with different methods of influence. The model is based on the theory of Markov chains. The adequacy of the model is achieved by the false positive and false negative errors. The application of the developed model enables us to determine the allowable maintenance interval for the fiber-optic communication lines.
Discrete-event Simulation of Operation and Maintenance of Telecommunication Equipment Using AnyLogic-based Multi-state Models
Authors: Lyubchenko A A , Kopytov E Y , Bogdanov A A , Maystrenko V A 
Published: January 2020

Abstract
Telecommunication equipment is a functional subsystem of railway transport which safety and efficiency are totally dependent on the reliable operation of utilized communication devices. Preventive maintenance is one of the most popular methods of ensuring the required reliability level of technological equipment on railways. The efficiency assessment of maintenance procedures implementation is done using the approved quality indicator of preventive maintenance. Whereas the availability coefficient is used for the quality estimation of the whole exploitation process. Generally, the calculation of the mentioned measures is performed on the basis of the statistical data about occurred failures. This method is characterized by significant advantages as well as obvious disadvantages in case of the lack or constrained obtaining of empirical data. Modern computer technologies allow automating and simplifying the estimation of the target quality indicators. However, it requires the development of proper mathematical support for such analysis. In the paper, we propose a simulation model of the operational process of railway telecommunication equipment with the opportunity of the estimation of the availability coefficient and the quality indicator of preventive maintenance in automated mode. The model takes into account sudden, fictitious and latent failures, the impact of spare parts availability and erroneous actions of service staff during maintenance, as well as periodicity and length of maintenance and repair for quality measures estimation. The model is built using the discrete-event approach with AnyLogic.
Research of efficiency of technologies for data processing in tasks of big data analysis
Authors: Teryoshkin S E , Yakovina I N 
Published: January 2020

Abstract
The paper compares the performance of technologies for big data processing applied for anomaly detection in a database of a billing system. Experiments have been conducted to evaluate the performance for processing big data of two technologies such as Hadoop MapReduce and Apache Spark. The datasets and configuration of the applications used in the experiments are described. The experiment results are presented as a description of the relation between calculation time, data size and imbalance in datasets. Based on the obtained results, a decision making system for choosing a technology for processing data depending on the characteristics of the datasets is proposed.
Quality assessment of regulatory legal acts using the Mamdani algorithm
Authors: Zyryanova E V , Belov V M , Kosov D L 
Published: January 2020

Abstract
This article describes the relevance of the problem of assessing the quality of legislation. The algorithm for quality assessing of regulatory legal acts is proposed as a tool for resolving this problem. This algorithm uses methods of fuzzy math and processes the results of the expert group questionnaire with these methods. The result of the algorithm is a characteristic of the quality of a regulatory legal act in the form of a fuzzy term of a linguistic variable. "Automated system for quality assessing of regulatory legal acts" is variant of automation of the algorithm for quality assessing of regulatory legal acts, which is described in this article.
Nonlinear net models of multi-parametrical systems and processes
Authors: Chizhik M A , Yurkov V Yu , Litunov S N , Skuba P Yu 
Published: January 2020

Abstract
This paper is devoted to the mathematical and computer simulation of multi-parameter systems. We show that the method and algorithm can easily be used in nonlinear net simulation of the systems. Simulation is based on experimental data and achieved by the variation of one-dimensional spline approximations. A set of variable one-dimensional splines is the result of simulation. Each of the splines is the image of a section of input parameters area. Software realization is based on the single algorithm that is used repeatedly. The method have been used in investigation some technological conditions of laminating fabrics systems. Specifically, we investigated the stability of gluing joints, hardness and bending of various parts of clothes. Also, we got the simulator of constituent elements of the mixture which may be used in label products as a temperature indicator. The examples eventually demonstrate the efficiency of the presented method.
Trajectory modelling when bypassing obstacles
Authors: Dubanov A A , Ausheev T V 
Published: January 2020

Abstract
This article deals with the modeling of trajectories on the plane and on the surface represented by a point basis. The obstacle is modeled on the parameter plane and consists of two parts. The first part is the area where access is denied. The second part is the area of trajectory distortion, if there were no obstacle. The article deals with the cases of modeling trajectories to a moving target, with moving obstacles and from a moving object of pursuit. All proposed algorithms are implemented in the system of computer mathematics MathCAD.
Decomposition method for real-time optimization problems in multilevel chemical process systems based on identification of compromise sets
Authors: Faruntsev S D 
Published: January 2020

Abstract
Solving real-time optimization problem for multilevel chemical process systems (MCPS) is associated with the challenge of involving extensive computational resources required for prompt solution of high-dimension nonlinear optimization problems. The article introduces a method for decomposition of online optimization problem in multilevel chemical process systems with collector structure based on identification of compromise sets. The method allows bringing optimization search procedures to higher control levels leaving the tasks of process stabilization in calculated optimum points to the lower level subsystems. The article describes the scope of application for the method illustrated with a sample solution of the problem of online optimization of process unit parameters including the system of carbon black reactors operating in parallel for the common collector.
The theta-theta channel functioning algorithm synthesis of the data measuring system for the maneuvering aircraft with consideration to its dynamic and kinematic characteristics
Authors: Glistin V N , Pudovkin A P , Belyaev M P , Panasyuk Yu N , Varepo L G , Danilov S N , Belyaev P S 
Published: January 2020

Abstract
The state and observation models considered both kinematic and dynamic aircrafts parameters should be applied for the electronic navigation aids accuracy increasing issue of the air-traffic control system data measuring. In contrast to current air-traffic control system kinematic and dynamic parameters summarizing allows to describe the aircrafts movement model more adequate. In the study the theta-theta (t-t) navigation channel functioning algorithm of the air-traffic control system data measuring constructed by the kinematic and dynamic parameters correlation principle was developed and tested.
Coordinate planes for main types of product drawing
Authors: Glukhov V I , Varepo L G , Shalay V V , Grinevich V A 
Published: January 2020

Abstract
The international organization for Standardization has developed a series of standards for the implementation of electronic geometrical models of products, where coordinate systems have been introduced for the first time. However, it is not considered in the electron models that the different functional purposes of both the coordinate planes and axis are differed. In order to improve the quality of project documentation developed with the help of electronic models, the geometric specifications of coordinate systems were determined, coordinate planes and axes were established to perform six basic 2D projections of the product. A new geometrical specification "informativeness" is introduced as the number of product degrees of freedom restricted by the base, coordinate plane or axis. The coordinate system of the product is materializes by a set of its design datums with a total informativeness of 6. Coordinate planes of the rectangular coordinate systems have the informativeness of 3,2 and 1, the coordinate axes -4,2 and θ (zero).
The study of deformation properties of a sand soil - expanded polystyrene granules mixture under cyclic loading conditions
Authors: Gruzin A V , Grinevich E S , Klimanov D N 
Published: January 2020

Abstract
The development of advanced materials for oil and oil products storage tank foundations under low temperatures and efficient technologies for their construction is an urgent task for oil and gas industry. It is proposed to use heat-insulating additives, for example, expanded polystyrene granules to reduce heat losses in foundation soils. The purpose of the research is to study the effect of artificial thermal insulation additives in sandy soils on the deformation properties of the resulting mixture. To achieve this goal, it is necessary to solve the following tasks: to prepare samples of the mixture "Sandy soil – expanded polystyrene granules", to carry out compression tests of the prepared samples and to process the results. Compression tests were carried out on samples of sandy soil – expanded polystyrene granules mixture with a 5% content of heat-insulating additives. Each test included five consecutive loading-unloading cycles. The maximum value of loading was 180 kPa. In the course of laboratory studies, data of a calculated value for a deformation modulus of investigated samples for the sandy soil – expanded polystyrene granules mixture were obtained. The calculated value of the mixture deformation modulus after the 4th loading cycle was 16.4 MPa, which was higher than minimum allowable (15 MPa) by 9%, and after the fifth cycle this value was 15% higher. The obtained results allow us to develop a tank foundation structure with improved heat-insulating properties and technology for its construction.