bluuebunny/crossref_metadata_2025 huggingface dataset:
Hard X-ray Imager (HXI) onboard the ASO-S mission
Authors: Zhang Zhe , Chen Deng-Yi , Wu Jian , Chang Jin , Hu Yi-Ming , Su Yang , Zhang Yan , Wang Jian-Ping , Liang Yao-Ming , Ma Tao , Guo Jian-Hua , Cai Ming-Sheng , Zhang Yong-Qiang , Huang Yong-Yi , Peng Xiao-Yan , Tang Zong-Bin , Zhao Xuan , Zhou Hong-He , Wang Lian-Guo , Song Jing-Xing , Ma Miao , Xu Guang-Zhou , Yang Jian-Feng , Lu Di , He Ying-Hong , Tao Jin-You , Ma Xiao-Long , Lv Bao-Gang , Bai Yan-Ping , Cao Cai-Xia , Huang Yu , Gan Wei-Qun
Published: November 2019

Hard X-ray Imager (HXI) is one of the three scientific instruments onboard the Advanced Spacebased Solar Observatory (ASO-S) mission, which is proposed for the 25th solar maximum by the Chinese solar community. HXI is designed to investigate the non-thermal high-energy electrons accelerated in solar flares by providing images of solar flaring regions in the energy range from 30 keV to 200 keV. The imaging principle of HXI is based on spatially modulated Fourier synthesis and utilizes about 91 sets of bi-grid sub-collimators and corresponding LaBr3 detectors to obtain Fourier components with a spatial resolution of about 3 arcsec and a time resolution better than 0.5 s. An engineering prototype has been developed and tested to verify the feasibility of design. In this paper, we present background, instrument design and the development and test status of the prototype.
Lyα science from the LST aboard the ASO-S mission
Authors: Vourlidas Angelos
Published: November 2019

We review the status of solar Lyα science in anticipation of the upcoming Advanced Space-based Solar Observatory (ASO-S) mission, planned for a late 2021 (or 2022) launch. The mission carries a pair of the Lyα Solar Telescopes (LST) capable of high resolution disk and off-limb imaging, which will provide the first synoptic Lyα imaging observations of the solar atmosphere. We discuss the history of Lyα imaging and latest results, and outline the open questions that ASO-S could address. ASO-S will launch at an optimal time for Lyα science. Several other Lyα telescopes will be in operation. We identify the synergies between ASO-S and other missions as well as serendipitous non-solar science opportunities. We conclude that ASO-S has the potential for breakthrough observations and discoveries in the chromosphere-corona interface where the Lyα emission is the major player.
Advances in flexible and wearable pH sensors for wound healing monitoring
Authors: Qin Mei , Guo Hao , Dai Zhang , Yan Xu , Ning Xin
Published: November 2019

Wound healing has been recognized as a complex and dynamic regeneration process and attracted increasing interests on its management. For effective wound healing management, a continuous monitoring on the wound healing based on sensors is essential. Since pH has been found to play an important role on wound healing process, a variety of pH sensors systems for wound healing monitoring have been greatly developed in recent years. Among these pH sensors, flexible and wearable pH sensors which can be incorporated with wound dressing have gained much attention. In this review, the recent advances in the development of flexible and wearable pH sensors for wound healing monitoring have been comprehensive summarized from the range of optical and electrochemical bases.
Implementation of an efficient parametric algorithm for optimal scheduling on parallel machines with release dates
Authors: Mezentsev Y A , Estraykh I V , Chubko N Y
Published: November 2019

An original statement and solution algorithms are presented for one of the key problems in the scheduling theory. The problem of optimal scheduling for a parallel system consists in the generation or control of schedules to minimize the schedule length or the losses from schedule disruptions in the completion of jobs on machines. This problem is NP-hard and cannot be solved exactly for any real-life number of dimensions. A series of modifications of the efficient parametric algorithm is proposed to find an approximate solution, which are an extension of a similar algorithm for optimal scheduling on unrelated parallel machines with release dates using the performance criterion (Stakh). Software implementations of the algorithm modifications have been tested on the data of a generating problem by the Stakh criterion; the corresponding statistics is provided.
Prospects for the creation of an optical-mechanical unit for a high-resolution nanolithograph
Authors: Kiryanov A V , Kiryanov V P , Homutov V N , Shimanskii R V
Published: November 2019

In this paper the proposals for solution of problems related to the creation of an optical-mechanical unit of promising models of a high-resolution laser nanolithograph are considered. The approaches to the implementation of the rotation module and of the linear displacement carriage of the recording head are considered aimed at reducing the temperature distortion of the synthesized element topology including due to the observance of the principle of symmetry of the nanolithograph main elements location and the points of application of the forces of its actuators relative to the main plane of the installation. The feasibility of creating a two-channel version of a nanolithograph that makes it possible to compensate in real time (while the substrate rotates) the resulting temperature distortions of the topology generated by external and internal heat sources is discussed. It is shown that the usage in the two-channel version of a nanolithograph of the differential-type laser interferometers allows reducing the distortions of the formed element topology up to tenths of a nanometer.
Methods of protecting radio-electronic control systems from powerful electromagnetic interference
Authors: Kharlanov A I , Kramar V A
Published: November 2019

An analysis of methods of protecting control system equipment from powerful electromagnetic interference was done. The nature of possible damages of radio-electronic components under negative influence of electromagnetic fields was considered. All methods of protection against powerful electromagnetic interferences can were divided into three groups: structural, sheet-oriented and structurally functional. The most effective protection measures aimed at preventing possible damages were determined. The purpose of the paper was to consider thoroughly each of the existing methods aimed at increasing the resistance of radio electronic system to negative impact of powerful electromagnetic interferences.
Time series prediction using the adaptive resonance theory algorithm ART-2
Authors: Gavrilov A V , Alsova O K
Published: November 2019

The algorithm of the adaptive resonant theory ART-2 is based on the ideas of dynamic clustering and the unsupervised learning model. The classic application of the ART-2 algorithm is related to the solution of pattern recognition problems in the framework of the neural network approach. The article proposes a modification of the adaptive resonance theory ART-2 as applied to the solution of the time series (TS) prediction problem. A description of the TS forecasting algorithm based on ART-2, its properties and application features, as well as the results of a study of TS free electricity prices of the “day-ahead market” (DAM) in Russia is here. The obtained results allow us to conclude about the prospects of using ART-2 to study the structure and prediction of TS with a periodic (seasonal) component.
Numerical simulation of oil formation with regulated disturbances. Oil recovery quality simulation
Authors: Batalov S A , Andreev V E , Lobankov V M , Mukhametshin V Sh
Published: November 2019

The article discusses the method of numerical modeling of a functioning reservoir based on the oil recovery hydromechanics model in the hyperbolic Cauchy problem. Optimization results for reservoir formation channels (RFC) modeling reveal integer values of new models with linear parameters of hydro-resistance, piezo capacitances and piezo inductances in the dimensionless values. The solution result is an effective tool for current prediction of filtration capacity properties (FCP) of the reservoir in the elastic water-pressure mode. The deduced numerical simulation methods based on long-term reactive RFC resistances make it possible to specify the limits of quality of oil displacement with controlled excitations at its coordinate-discontinuous controls.
Simulation of formation fluid withdrawal hydrodynamics using a downhole jet pump when studying the productive formation while well drilling
Authors: Ermolenko F I , Minnivaleev T N
Published: November 2019

The article discusses hydrodynamics of the reservoir fluid withdrawal from the promising drilled formation interval with the use of a jet pump installed in the internal cavity of the drill pipe string in the wellbore bottom-hole part. The hydrodynamic problem of fluid production is solved. The solution connects the dynamics of injected, recoverable and upward flows of the circulating system.
The optimal estimation of parameters of models of controlled stochastic systems based on the experiment design
Authors: Denisov V I , Chubich V M , Filippova E V
Published: November 2019

The procedure of active identification, which is resistant to the appearance of anomalous observations, includes robust estimation of unknown parameters and optimal design of input signals for models of non-stationary linear discrete systems is proposed. The general case of the entry of unknown parameters into the equations of state and observation, the initial condition and the covariance noise matrix of the system is considered. Using the developed software, the efficiency of this procedure is demonstrated by the example of a direct current motor control system.
Processing of the ECG orthogonal band-pass filter with the subsequent transfer in the phase plane
Authors: Grishanovich Y V , Potekhin D S
Published: November 2019

One of the methods of diagnosis and recognition of cardiovascular diseases is electrocardiography. The current state of diagnosis of cardiovascular diseases requires the development of new approaches to the analysis of electrocardiograms, there is a need to create new algorithms for processing information received from patients as a result of ECG removal. In this paper, it is proposed to use a band-pass orthogonal digital filter based on the Morlet wavelet function for processing electrocardiograms, which is not sensitive to the constant displacement of the input signal, does not have the Gibbs effect, which provides a better level of suppression in the barrier band obtained using the Fourier transform, followed by its transfer to the phase plane. The phase plane has found application in medicine for increase of reliability of the analysis and interpretation of an electrocardiogram for the purpose of increase of informativeness of cardiograms.
On discrete groups and solvable equations of nonlinear oscillations
Authors: Khakimova Z N
Published: November 2019

The autonomous ordinary differential equation of Lienard is considered. This equation and its generalizations arise in the theory of nonlinear oscillations, dynamical systems, etc. Currently for equations of the Lienard type, the problem of finding exact solutions is relevant. In view of this, the problem is to find connections in Lienard type equations with investigated nonlinear equations. These problems are solved in this article for the Lienard equation with three-parametrical coefficients of polynomial type. We found a transformation that reduces the equation under consideration of the well-studied generalized Emden-Fowler equation. We indicated the method of finding exact solutions of Lienard equations with various parameters. The transformations discrete group of dihedron for the class of generalized Emden-Fauler equations induces a discrete group of transformations for the corresponding class of Lienard equations. Likewise, known solutions of some particular generalized Emden-Fauler equations induce solutions of the Lienard equations. As examples, we found exact solutions in elementary (including polynomials) and special functions of several Lienard equations with certain parameters.
Ontological approach of designing a multi-agent behaviour model in the internet environment
Authors: Kravchenko Yu A , Kursitys I O , Kravchenko D Yu
Published: November 2019

The paper deals with design of the model of the subsystem of environment assessment (SEA). The authors develop the ontological approach of building of the model of the subsystem, which is considered as one of the main subsystems of community organization of intelligent agents working in the integrated information environments. The approach is based on distribution of invariant aspects of building of the SEA as a multi-level architecture of semantic relations between actors, passive entities (objects) and knowledge which depends on the subject area and describes the intelligent agents’ operational environment and target use.
The study of the logical mode of function choice of digital protection on the railway control
Authors: Kuznetsov S M , Dmitriyeva E A , Avetisyan B R , Markova S V , Avetisyan K R
Published: November 2019

The article analyzes the existing protection systems for the traction substation-traction network –electric stock system, including digital terminals having several levels of digital protection used in the Russian Federation. Their vulnerabilities were described. Based on the analysis, a protection system responding to a number of signs of the transition process and having a built-in logic function used to select a mode was developed.
Development of specialized algorithm and hardware implementation for calculation of value of truncated convolution of polynomials over Galois field
Authors: Rahman P A
Published: November 2019

This scientific paper deals with an algorithm for calculation of the truncated convolution of polynomials over the Galois field GF(pm
). Calculation of the truncated convolution of polynomials is a key part of the information frame decoding algorithm on application of the Reed-Solomon codes in the noise protected data transmission and storage systems. Within the scientific paper, the definitions of polynomial and truncated convolution of the polynomials over the Galois field GF(pm
) are also overviewed. Finally, the author offers a specialized algorithm for calculation of the value of the truncated convolution of polynomials over the Galois Field GF(pm
) with a given argument. Its hardware implementation for the binary Galois field GF(2
m
) is also presented.
The influence of algorithms for tuning the parameters of neuromorphic systems on their fault tolerance
Authors: Danilin S N , Shchanikov S A , Bordanov I A , Zuev A D
Published: November 2019

This article describes the influence of algorithms for tuning the parameters of neuromorphic systems on their fault tolerance. This is relevant to the hardware implementation of neuromorphic systems using memristors (NSM). The study is conducted using the authors developed a variant of the system approach and methods of simulation of artificial neural networks (ANN). By the example of a multilayer perceptron, it is shown that different ANN learning algorithms in the nominal mode of operation make it possible to achieve similar values of the operation accuracy. But due to the influence of production and operational factors in real conditions of operation, the ANN may fail. The range of allowable values of the destabilizing factors on ANN operation depends on the learning algorithm and may differ several times.
Compensator models based on block-oriented neural networks
Authors: Solovyeva E B
Published: November 2019

Block-oriented neural networks represented as a cascade structure of linear dynamic circuits and inertialess nonlinearities are used for the non-linear compensator synthesis. The behavioral models of these neural networks describe the mapping of the set of input signals into the set of output signals. A block-oriented architecture is convenient for building the compensator structure inverse to the structure of the distorting system. Under the stated approach, the compensator model is simpler than universal models, for instance, the Volterra series. This fact is demonstrated when modelling a non-linear compensator based on the neural Hammerstein network. This compensator is applied for the suppression of non-linear distortion in the digital communication channel described by the Wiener model.
A Monte Carlo investigation of one approach to prioritization for a large number of software requirements
Authors: Timofeeva A Yu , Murtazina M Sh
Published: November 2019

The paper presents an approach to prioritization for a large number of software requirements. It selects certain requirements as benchmarks. The selection is based on the analysis of a pairwise comparison matrix. Several selection rules are proposed. A Monte Carlo simulation was conducted to study the effects of the benchmark selection rules on rank correlation between true and estimated priorities. The results of the simulation suggest that the best way to select one benchmark is the rule based on the most consistent judgements independent of experimental conditions. Several benchmarks must be chosen in another way. This problem will be the subject of future research.
Algorithm diversity metric for N-version software
Authors: Gruzenkin D V , Yakimov I A , Kuznetsov A S , Tsarev R Yu , Grishina G V , Pupkov A N , Bystrova N V
Published: November 2019

Software reliability and fault tolerance are in the list of the primary importance tasks to be solved in industrial applications. N-version programming is one of the approaches contributing to the solution. This approach implies the realization of a set of software modules versions. The effectiveness of the approach is obtained by the modules versions diversification: the higher the diversification than higher the reliability. The subject matter of the article is the difference between the software modules versions at the level of algorithms, i.e. the version diversification. The hypothesis about the quantitative metric that defines the differences between programs is verified by the experiment results. The experiment was dedicated to the analysis of several realizations of program algorithms for inner sorting of numerical arrays. There was an execution trace for each algorithm and it reflected the way of algorithm operation in multidimensional space. The analysis that was held on the basis of the suggested concept about the obtained execution traces of implemented algorithms discovers both the differences between algorithms and the similarities between the modifications of the same algorithm.
Fuzzy voting algorithms for N-version software
Authors: Tsarev R Y , Durmuş M S , Üstoglu I , Morozov V A , Pupkov A N
Published: November 2019

The choice of the voting algorithm in N-version programming directly affects the evaluation of the results of N software versions and determines the correct result. The result of the voting algorithm is also the outcome of the N-version software. Therefore, the choice of the voting algorithm is vital. However, many voting algorithms were already developed and they may be selected for implementation, based on the specifics of the analysis of input data of these algorithms. This article presents a brief overview of major fuzzy voting algorithms.
Simulation modeling in the process of loading the machine and tractor fleet
Authors: Tsybina Y S , Aletdinova A A
Published: November 2019

The article describes the use of simulation modeling as a method to increase the efficiency of the formation of the machine and tractor fleet (MTF). The advantages of the use of simulation modeling in combination with traditional approaches to the formation of the MTF are presented. A model of verification of the production plan of an agricultural enterprise has been formed taking into account the use of simulation modeling. The place and role, conceptual requirements, an interaction overview diagram have been determined and basic parameters of the simulation model have been identified which satisfy the process under study. The simulation model can be used both as an independent program module and as part of software systems related to the management of the production resources of agricultural organizations.
Application of the non-stationary waterflooding technology and periodical operation of production wells for heterogeneously permeable reservoirs
Authors: Almukhametova E M
Published: November 2019

Application of the non-stationary waterflooding technology at the Kumkol field (the Republic of Kazakhstan) had a number of unsolved problems. The main problem is correct selection of parameters for the non-vascular flooding technology - an amplitude and a cycling impact frequency. The amplitude of impact is determined by the capabilities of the reservoir pressure maintenance system (RPM) and the ability of the reservoir to absorb large volumes of water. The impact frequency is a more unstable parameter depending on the structure of the reservoir and saturation of heterogeneous fluids. For the Kumkol field conditions, the void reservoir space has a complex multi-level structure. There are pore reservoirs with different permeability rates, highly permeable layers located over the deposits, filtration channels with very high permeability (cracks, a super collector). In addition, there are three phases of reservoir fluids (oil, water, free gas). All this creates uncertainty in setting frequency parameters of the non-stationary waterflooding method. The article deals with the issue of determining frequencies of impact.
Algorithm to distribute feed pulp between paralleled thickeners during red-sludge thickening and washing in alumina production
Authors: Fedorova E R , Vasileva N V , Pupysheva E A
Published: November 2019

Distributing the red-sludge flow between paralleled thickeners is a relevant problem for controlling the process of thickening and washing the alumina sludge. Sludge sticks to thickener walls and rakes in operation, which reduces the effective volume of the machine and puts a greater strain on the rakes; raising the rakes is necessary to avoid breaking the stirrer, but this reduces the compacting rate of the thickened product. Redistributing the feed pulp between thickeners over the course of their gradual uneven contamination might solve the problem of the thickened product being under-compacted in the thickening-washing line. There are patents that address this issue; however, they only describe semiautomatic approaches. The problem has been covered to a great extent by Russian scientists and engineers such as M V Levin, T B Potapova, V V Aleksandrov, T G Milberger, P F Minin, I M Fain, R M Khamidov, as well as by the following institutions: All-Union Research and Development Institute of Aluminum, Magnesium, and Electrode Industries, Pikalevo Alumina Plant, Pavlodar Aluminum Plant. The paper describes the algorithm of an artificial immune system for redistributing the red-sludge flow in alumina production between paralleled thickeners.
Controlling the temperatures during the calcination of aluminum hydroxide in rotary kilns
Authors: Nikolaev A N
Published: November 2019

Processing 4.1 to 4.2 tons of nepheline concentrate mixed with limestone produces 1 t of alumina, 0.8 t of sodium carbonate, 0.3 t of potash, and 10 tons of cement. The costs of producing these from nepheline are significantly lower than the costs of individual production from conventional raw materials by conventional technology. Unlike the traditional ammonia-based method, the nepheline technology of producing soda ash is environmentally friendly and does not require costly sludge fields. Using belite sludge as the raw material for making cement improves the performance of kilns and reduces the fuel consumption by over 40% compared to the conventional technology. Making alumina with a specific content of α-Al2O3 and γ-Al2O3 requires an automated process control system (APCS). In an industrial setting, only automatic controls enable maintaining a technologically healthy process. This paper presents a summary of the aluminum hydroxide calcination process that occurs in tubular rotary kilns. The research team has synthesized a dynamic control object model to plot curves of the target-parameter acceleration as induced by stepwise disturbances in air flow, charge flow, and fuel flow in order to compute the basic dynamic characteristics of the control object. A control parameter has been selected for the prospective single-loop control system. On the basis of the obtained characteristics, the research team has selected a controller for their single-loop kiln temperature stabilization system. The paper presents curves of the control-channel and disturbance-channel transients in the target parameter
Microoptoelectromechanical ring angular velocity transducer based on the optical tunnel effect for control system of mobile objects
Authors: Busurin V I , Win Yin Naing
Published: November 2019

In this article, the influence of the ring resonator parameters on the characteristics of the angular velocity transducer based on the optical tunneling effect (OTE) is investigated and model is introduced. The sensitivity of the module based on the optical tunneling effect is calculated to provide a quasi-linear range. The analysis of influence of linear acceleration on the ring angular velocity transducer based on the OTE is described. The compensation of the linear acceleration effect by using the differential processing method and switching, which provide the measurement of angular velocities with high accuracy for the entire measurement range, is described.
The control system for a mobile robot using Arduino mega 2560 with GPS and obstacle detection systems
Authors: Cherepanov P Y , Romanov P A , Zharikov S V , Mazhitov T R
Published: November 2019

This research shows the implemented software and hardware solutions of the remote control systems for a robotic vehicle. This paper partially solves the problem of rapid prototyping and debugging of motion algorithms of the robotic vehicle. The composition and brief characteristics of the main components used in this system are also given in this paper. The methods (the programming languages that were used to create the software of this vehicle) are also described in this research. The results and the basic goals for the further modernization of this vehicle are also given in this paper. Main conclusions also described in this paper.
Technique of visualization of dynamic characteristics of electromagnetic strike machines
Authors: Kargin V A , Volgin A V , Moiseev A P , Lagina L A , Churlyaeva K D
Published: November 2019

At present, the use of pulsed linear electromagnetic engines in the drive of strike machines for immersing rod elements in soil, percussive drilling of shallow wells and dynamic sounding of soils is recognized to be quite effective. The transient time in linear electromagnetic engines of such devices is not more than 0.25 s, which makes it difficult to obtain the most complete information about their characteristics. The solution to this problem with the help of traditional technical means is found difficult. Experimental studies of the working processes of pulsed linear electromagnetic engines of strike machines were carried out. The study of work patterns, the development of recommendations for the rational selection of individual design and operating parameters allow for maximum mechanical energy at the engine output with the greatest possible efficiency. The technique of visualization of the dynamic characteristics of strike machines with pulsed linear electromagnetic engines using a multifunctional analog-to-digital converter board is considered.
Linear stepping electromagnetic engine for driving conveyors
Authors: Kargin V A , Volgin A V , Moiseev A P , Maradudin A M , Leontiev A A , Peretyatko A V
Published: November 2019

The rise and sustainable development of mining enterprises are inextricably linked with the creation of competitive technology for advanced technologies in construction, mining, engineering and geological surveys. In the improvement of characteristic technologies, an important role is played by power discrete drives with linear electromagnetic engines, which make it possible to abandon motion converters and especially successfully compete with traditional electric engines in machines and installations where discrete translational motion of the working body is necessary. The kinematic separation of the armature and the output shaft and the use of an axial channel in a linear electromagnetic engine made it possible to create electromagnetic machines with new properties in which the mechanical power is derived using a toothed bar of any desired length. In the work, the force analysis of the interaction of the working body with the locking mechanism in a stepper linear electromagnetic drive engine of the conveyors is carried out. The degree of influence of the angle of inclination of the locking elements on the amount of effort required to drive the working body is revealed.
Integrated information and analytical systems for monitoring technical condition of electromechanical equipment
Authors: Malov D A
Published: November 2019

The presented article shows one of the approaches to the development of the module for monitoring a technical state, diagnostics and an estimation of the residual life of electromechanical equipment. The main tasks and directions of the development of a modern industrial enterprise are integrated information and analytical systems. The developed module is necessary for the formation of maintenance plans for process equipment based on its actual state. The analytical task of the proposed module is the prediction of equipment defects with different delta of a time delay. The block diagram of the equipment diagnostics module allows dynamically changing the depth of the forecast.
Studies of voltage stabilization and balancing systems in energy storage modules based on supercapacitors
Authors: Abdallah W J
Published: November 2019

Supercapacitors come under different names and scientific nominations as Ultracapacitors (UCs) or double layer capacitors, or electrochemical capacitors, they are considered as promising technological devices used for storing energy in the field of energy storage systems. They are able to deliver high power and enable high load currents in addition their ability to bridge power gaps. As we will notice, they have fast yet complicated charging/discharging mechanism interpretations. This paper will provide an overview on different equivalent circuits of a supercapacitor, and will highlight the concept of unbalanced series of connected ultracapacitors and different options in rectifying such unbalance. The balancing of supercapacitors connected in series can come in different modes passive or active and maybe hybrid. A comparison between the different modes will be executed using MATLAB/Simulink and results will be shown based on the economical and performance perspectives.
Experimental studies in heating oil-saturated rock with high-frequency electromagnetic field
Authors: Kovaleva L A , Minnigalimov R Z , Nafikova R A , Zinnatullin R R , Sultanguzhin R F
Published: November 2019

The paper describes a test bench for studying the interaction between electromagnetic fields and oil-saturated porous mediums. Dielectric parameters of the targets have been determined. Results of experimental studies in heating oil-saturated rock with high-frequency electromagnetic field are given.
Applying barycentric coordinates on balanced supply voltages triangle to zero sequence voltage estimate without phase measurements
Authors: Lopatkin N N
Published: November 2019

The paper offers a new vector-coordinate description for a complex-plane position of a neutral bias voltage phasor relevant to a three-phase circuit with an unbalanced load. It is assumed that no negative sequence voltage component is present, i.e. the supply three-phase system voltages are symmetric and sinusoidal. The so called “new coordinates” and being defined with the help of them barycentric coordinates on a balanced supply line-to-line voltages triangle have been introduced. The proposed approach made it possible to obtain simple enough analytical expressions. A RMS value of the positive sequence component and further a static phasor of the zero sequence voltage unbalance factor are described. They are based on three line-to-neutral load voltages voltmeter RMS readings only. Accordingly, these calculations need no phase measurements. The presented neutral bias voltage coordinates calculations might be useful in a three-phase load circuit monitoring, diagnostics (fault detection), protection and voltages unbalance compensation.
Algorithm of electrokinetic dehydration and final drying of valuable tree
Authors: Porsev E G , Malozyomov B V , Zhigalov K Yu
Published: November 2019

The paper considers the issues of wood drying followed by huge energy consumption rates. It analyzes current traditional technologies of wood drying in order to identify the main disadvantages. The key idea of the study is the phenomenon of electric osmosis that makes it possible to extract liquid from the massif of wood. The technology shall significantly increase energy efficiency of wood drying due to energy saving thus reducing the costs of wood drying.
Studying optoelectronic method of determining one substance in the other in petroleum production
Authors: Rakhimov N R , Shakurova Al F , Zakirova Kh D
Published: November 2019

This paper introduces optoelectronic method of determining one substance in the other in petroleum production with a fiber-optic sensor (FOS). This method application is important for solving problems of contemporary oil, gas and petroleum production.
Quantitative determination of fault tolerance of memristor-based artificial neural networks
Authors: Danilin S N , Shchanikov S A , Bordanov I A , Zuev A D
Published: November 2019

The authors have reviewed interpretations of the terms “dependability” and “fault-tolerance” in Russian and interstate standards. A new quantitative criterion of fault-tolerance of the memristors-based artificial neural networks is proposed and substantiated. The authors have also proposed and provided rationalization for a revised definition of fault-tolerance as a property of the memristors-based artificial neural networks, which most fully conforms to the new version of its quantitative criterion. An example of the application practice for the fault-tolerance criterion during the design stage of an artificial neural network of a test degree of complexity is given.
Application of vibration diagnostics methods and programs to assess the remaining lifetime of oil equipment
Authors: Zainagalina L Z
Published: November 2019

The article deals with the method of evaluating oil equipment remaining lifetime by vibration diagnostics. The advantages of machine maintenance according to its technical condition, compared with planned-preventive repairs, are given. The technical conditions of the wellhead stuffing box of a beam pumping unit and a centrifugal pump machine were studied by Corsair vibration analyzer and Aurora software product, providing the evaluation of the current machine condition for planning a repair period. While analyzing the results of the equipment vibration diagnostics, the conclusions on faults were made and the dates of predictive maintenance were determined: the date for the next measurement (condition control) and the date for repair. The vibration diagnostics significance was confirmed in experiments as the most universal parameter which provides accurate information on equipment condition, making it possible to evaluate equipment technical condition in operation and predict its reliability.
Simulation of parts manufacturing in the enterprise mechanical-repair department
Authors: Ivanov V A , Feshchenko A A
Published: November 2019

A continuous production process has a number of peculiar properties that affect the organization of technological equipment maintenance and repair aimed at the most efficient using of the service time, that is, the required number of equipment maintenance and repair with the required quality. It is necessary to have its own service department in large manufacturing enterprises, which includes an autonomous mechanical repair unit, allowing one to manufacture, restore parts, components and assemblies for the main technological chain, without the third parties help to ensure the continuous functioning of the repair service. This approach provides a significant reduction of service cost, production and part (unit) repair time, a more accurate account of the production conditions characteristics. However, as a rule, the organization of the repair and mechanical shops is at a low technological level due to the secondary role of such units within the manufacturing enterprise. It is possible to revise the approach to the organization of internal material, information flows with the using of modern modeling process methods. This is the purpose of this work. A chronometric measurement of the manufacturing process, the part restoration before and after the test process change were carried out, a new process simulation was produced by ARIS EPC, which allows one to analyze the action algorithm of the process participants to achieve this purpose.
Application solution for preparing business processes information for the 1C: Enterprise platform using ERwin process modeller
Authors: Kapulin D V , Russkikh P A , Moor I A
Published: November 2019

At present, it is obvious that an increase of the enterprise efficiency indicators is achievable in providing a process approach to manufacturing management. The process approach allows eliminating fragmentation in flow of works, organizational and informational gaps, duplication of functions, inefficient use of material and human resources, as well as significantly reducing transaction costs. However, it should be noted that its successful implementation is a multi-step problem, which takes significant time, labor and material costs. It is important to use CASE-tools for analysis of business processes in integration with corporate management systems (ERP-system) implementing these business processes. One of the well-known CASE-tools in structural analysis and design methodology is the ERwin Process Modeler. The article proposes a universal solution for transforming the process models of ERwin Process Modeler business into business process models in the ERP system environment «1C: Enterprise». The developed software-tool allows supporting and updating business processes without changing the configuration of the ERP system, and it is important for manufacturing enterprises with a complex technological process.
Efficiency enhancement method for distributed CAD systems in fog-computing environments
Authors: Kureychik V M , Safronenkova I B
Published: November 2019

This paper presents the new method, which is promising for circuit partitioning problem (CPP) solving in distributed computer-aided systems (DCADs) in terms of fog-computing environments. The circuit partitioning problem belongs to NP-hard one. Nowadays parallel computing is widely used for NP-hard problem solving. One of the most important criteria of DCADs performance is the speed of a workload distribution problem solving. The time needed for this procedure can be long enough to affect the computational process. Fog-computing environments have some peculiarities, which affect the workload distribution problem solving. A proposed method allows getting a solution of a satisfactory quality. The fundamental difference of this method is an ontological analysis, which is based on applied algorithms and available resources. It allows decreasing the search space of candidate nodes for workload distribution problem. The novelty of this paper is an ontological approach to workload distribution problem solving in DCADs in fog-computing environments.
The formation of the scope of architectural design in the context of using information technology
Authors: Saprykina N A
Published: November 2019

The article is devoted to an actual problem of determining the characteristics of formation and development trends of information space architecture. Using in architectural activities computer technologies has significantly changed the possibilities for architecture in general. This concept allows us to understand the importance and necessity of finding new trends in the scope of architectural design. The purpose of the article is to determine the overall direction of creating objects in the architecture and urbanism, which use the latest information technologies and resources. The leading approach to the study of this problem is based on the methods parametric modeling, information technology and virtual reality when forming the scope of architectural design. As a result of the research we defined innovative approaches to the scope of architectural design in the context of the use of information technology. Materials can be useful for the theory and practice of forming the environment which opens completely new possibilities in architecture and construction.
The numerical modeling of moving of dwarf galaxy through the intracluster medium
Authors: Kulikov Igor , Chernykh Igor , Karavaev Dmitry , Protasov Viktor , Prigarin Vladimir , Ulyanichev Ivan , Vorobyov Eduard , Tutukov Alexander
Published: November 2019

In this paper, we present the new results of mathematical modeling of dwarf galaxy movement through the intracluster medium (ICM). Our numerical model includes self-gravity hydrodynamics equation for the gas component of the galaxy and collisionless Boltzmann equation for the stellar component. We also included important sub-grid physics: star-formation, supernova feedback, stellar wind, cooling, and heating function, and non-equilibrium chemistry to ion helium hydride. As a result of our simulation, we provide density, pressure, and temperature for destruction processes in the high-density intracluster medium.
Numerical simulation of an anisotropic heat transfer in magnetized neutron stars with 3D basic operators method
Authors: Kondratyev I A , Moiseenko S G , Bisnovatyi-Kogan G S , Glushikhina M V
Published: November 2019

We have solved numerically a three dimensional boundary-value problem for a heat transfer equation in a magnetized neutron star crust with an updated tensorial heat conductivity coefficient. The temperature distribution in a neutron star crust in presence of a magnetic field was simulated. To calculate the surface temperature distribution, we have constructed a local one-dimensional plane-parallel model of a magnetized outer envelope of the neutron star and used it as an outer boundary condition for 3D problem to find a self-consistent solution.

This problem was solved with our extension of a basic (support) operators numerical method on a tetrahedral mesh. The idea of operator approach consists of inclusion the boundary conditions into difference form of the solving problem and its formulation as one operator equation. The finite difference operators are constructed in the way to fulfill corresponding relations between continuous operators (for example, div(curl)=0, div is conjugated to -grad so div(grad) is self-conjugated etc.). Such approach allows to obtain completely conservative implicit finite difference schemes. Efficient iterative methods can be used to find the solution because constructed matrixes have good properties, such as symmetry and positive definiteness.
Chemistry of ion injection in supernova remnant shocks: hybrid simulations in the light of He/C/O data from AMS-02
Authors: Hanusch Adrian , Liseykina Tatiana V. , Malkov Mikhail A.
Published: November 2019

The high precision spectrometry of galactic cosmic rays (CR), e.g. PAMELA experiment [1], accurately determined an approximately 0.1 difference between the rigidity spectral indices of protons and He ions. Similar deviations have been indicated earlier by other experiments [2] confirmed by the recent high-fidelity AMS-02 measurements [3]. These findings widen the window into a complicated selection process whereby collisionless shocks, such as supernova remnant (SNR) blast waves, extract different chemical elements from an interstellar matter mix. The similarity of He/p, C/p, and O/p rigidity spectra demonstrated by AMS-02 has provided new evidence that injection is a mass-to-charge (A/Z) dependent process. We investigate the particle injection into the diffusive shock acceleration using one- and two-dimensional self-consistent hybrid simulations. Our 1D simulations prove that an SNR shock can modify the chemical composition of accelerated CRs by preferentially extracting them from a homogeneous background plasma without additional, largely untestable assumptions. Our results confirm the earlier theoretical predictions of how the efficiency of injection depends on the shock Mach number MA
. They show that selection rate of different ion species increases with A/Z, saturates, and peaks as a function of MA
. The 2D simulations also evidence a deviation from the linear selection rate vs A/Z trend, pointing towards a saturation for higher A/Z. The integrated SNR rigidity spectrum for proton-to-helium flux ratio, obtained by the convolution of the time-dependent injection rates of protons and He ions with a decreasing shock strength over the active lives of SNRs, compares well with the AMS-02 and PAMELA data. The numerical results [4] correctly predict the decrease in p/He flux ratio with increasing rigidity at exactly the rate measured in the experiments for ℜ > 10 GV. Only at lower rigidities, ℜ < 10 GV, the difference between the data and our predictions becomes noticeable. Whether this deviation comes from the propagation through the interstellar medium or solar modulation, remains unclear. Except for this uncertainty, the suggested mechanism for A/Z-dependence of the injection fully explains the measured p/He ratio.
Parallel Realization of the Hybrid Model Code for Numerical Simulation of Plasma Dynamics
Authors: Boronina M A , Chernykh I G , Genrikh E A , Vshivkov V A
Published: November 2019

The work is devoted to a parallel realization of a hybrid model for study of plasma dynamics in axially symmetric open magnetic traps. The model is based on MHD approximation for electron component of the plasma and on the kinetic approach for ion component. In the model the particle-in-cells method (PIC) with explicit numerical schemes on staggered grids for the cylindrical coordinate system is applied. The permanent injection of the particles, the long characteristic times, the necessary grid resolution and the conditional stability of the method required development of parallel version of the algorithm. In the parallelization we use the mixed decomposition with static load balancing. We present the parallel algorithm as well as results of the computational experiments on plasma dynamics in regime of diamagnetic confinement in an open magnetic trap.
Parallel Algorithm for Supercomputing Simulation of Dust-Gaseous Gravitating Systems Using Particle-In-Cell and SPH Methods
Authors: Snytnikov N.V. , Stoyanovskaya O.P. , Glushko T.A.
Published: November 2019

We present a supercomputer numerical model for simulating 3D dynamics of dust-gas gravitating circumstellar disk. The model combines SPH method for solving gas dynamical equations, particle-in-cell (PIC) method for solving Vlasov equation, and convolution FFT-based grid method for solving Poisson equation. The approach is based on 3D domain decomposition, sorting of particles with regard to grid cell, and transferring necessary amount of particles between subdomains. The algorithm is aimed to be run on supercomputers with distributed memory and on hybrid supercomputers.