bluuebunny/crossref_metadata_2025 huggingface dataset:
Nonstationary analytic model of hydrodynamic rolling lubrication
Authors: Ivanov V A , Erkayev N V
Published: December 2019

A model of normal oscillations of a roller moving along the surface at a constant speed in the presence of a liquid lubricant layer is considered. The pressure distribution along the lubricant layer is obtained by integrating the Reynolds equation, taking into account both the tangential and normal speed of the roller relative to the support surface. An analytical solution of this equation is constructed by the method of asymptotic expansion in a singular small parameter. The solution contains both regular terms of the expansion in powers of a small parameter and boundary-layer functions that rapidly decay over time.
Model of fuzzy ultra-acoustic diagnostics of nanocomposite functionally graded plate constructions in mechanical engineering
Authors: Storozhev S V , Storozhev V I , Bolnokin V E , Hai Duong Minh , Mutin D I
Published: December 2019

A description of a numerical-analytical technique for obtaining fuzzy estimates of the physical-mechanical parameters of plates that are exponentially inhomogeneous in thickness from functionally gradient transversely isotropic nanocomposite materials intended for use in mechanical engineering and aerospace technologies is given. The technique is based on the use of uncertain experimental data of measuring the lengths of normal shear elastic waves with different frequencies for different modes of the dispersion spectrum of the plate under consideration having interpretation in form of fuzzy sets. For obtaining fuzzy estimates of physical-mechanical parameters the transition to fuzzy-multiple arguments in the analytical relationships between the physical-mechanical parameters of functionally gradient transversely isotropic nanocomposite materials and the characteristics of ultrasonic measurements are used.
The influence of convective drying on the change of Kirpichev mass-exchange criterion
Authors: Sorochinsky Vladimir F
Published: December 2019

The results of experimental studies of changes in the Kirpichev mass-exchange criterion during drying of grain related to leguminous crops, which are susceptible to cracking and deterioration in quality during drying, are presented. Based on the results of experimental studies of the moisture content of the center and the surface of the caryopsis, regression equations have been obtained to determine the maximum allowable values of the Kirpichev criterion for different grain drying modes, which have been verified by determining the germination energy of the grain.
Numerical modelling of the liquid filtering process in a porous environment including the mobile boundary of the “oil-water” section
Authors: Ravshanov N , Nazirova E Sh , Pitolin V M
Published: December 2019

The paper considers the process of oil-water filtration in a porous medium. To study, predict the main process indicators and make managerial decisions, a mathematical model has been developed, an effective numerical algorithm based on the ideas of differential-difference schemes and the differential sweep method, with the help of which computer experiments can be carried out. When modelling the object of study, the process of displacement of one liquid by another in a porous medium is considered.
Ab initio calculations of the formation polymerized fullerite from endohedral clusters Li@C24
Authors: Greshnyakov V A , Belenkov E A
Published: December 2019

First-principle calculations of a new endohedral cluster Li@C24 proved its stability at room temperature. In the case of bulk compression of fullerite Li@C24, polymerization leading to the formation of a diamond-like LiC24 structure occurs at a pressure of 0.18 GPa. This pressure is an order of magnitude lower than the pressure at which diamond-like CA4 phase can form from clusters C24.
Investigation of the effect of Al plasma treatment on the superconducting properties of YBa2Cu3O7−δ
Authors: Ushakov A V , Karpov I V , Shaikhadinov A A , Demin V G
Published: December 2019

The effect of the partial substitution of Cu for Al on the structural, compositional, and magnetic properties of polycrystalline compounds YBa2Cu3O7−δ was studied. All prepared samples turned out to be single-phase with a small fraction of Ba secondary phases. Substitution of more than 2% aluminum causes an increase in spurious phases. DC susceptibility measurements show that the superconducting transition temperature T C
decreases. Hysteresis loops show that magnetic irreversibility decreases with increasing Al content. The critical current density J C
obtained using the Bean formula does not follow the same change. Al compensates for a decrease in J C
and an increase in its content near the solubility limit gives a higher J C
than in an undissolved sample.
Optimal parameters selection of particle swarm optimization based global maximum power point tracking of partially shaded PV
Authors: Obukhov Sergey , Ibrahim Ahmed , Aboelsaud Raef
Published: December 2019

This paper presents optimal parameters selection of particle swarm optimization (PSO) algorithm for determining the global maximum power point tracking of photovoltaic array under partially shaded conditions. Under partial shading, the power-voltage characteristics have a more complex shape with several local peaks and one global peak. The two proposed controllers include dynamic Particle Swarm Optimization, and constant particle swarm optimization. The developed algorithms are implemented in MATLAB/Simulink platform, and their performances are evaluated. The results indicate that the dynamic particle swarm optimization algorithm can very fast track the GMPP within 128 ms for different shading conditions. In addition, the average tracking efficiency of the proposed algorithm is higher than 99.89%, which provides good prospects to apply this algorithm in the control search unit for the global maximum power point in stations.
Raman gas analyzer for detecting carbon isotopologues
Authors: Vitkin V V , Chubchenko I K , Polischuk A V , Kovalev A V , Popov E E
Published: December 2019

A Raman gas analyzer for detecting carbon isotopologues with an excitation laser with a power of 5 W, generating at a wavelength of 532 nm, focusable in a waist of 7 μm using a lens with compensation for spherical aberration is presented. The signal is detected by a high-resolution spectrometer with a matrix cooled to -40° C. The program optimization of the system parameters is presented: focusing lens, cuvette windows.
Creation of cyber-physical systems based on basic structures in conditions of uncertainty
Authors: Korshunov G I , Polyakov S L
Published: December 2019

The article describes the processes of transformation of the basic structures of technical systems into cyber-physical systems based on the introduction of innovations. A distinctive feature of cyber-physical systems is the direct penetration of methods and means of cybernetics into controlled physical processes in order to intellectualize the system and minimize the influence of the “human factor”. The introduction of innovations occurs in conditions of insufficient information and is always associated with different types of uncertainty. Uncertainty disclosures are based on probabilistic models, fuzzy sets or using knowledge bases. The phased introduction of innovations allows for the reasonable allocation of resources. Basic structures are fundamental technological innovations, represented by functionally necessary and functionally sufficient structures of systems that control physical processes. The article describes the processes of transformation of the basic structures of systems into cyber-physical systems used in various physical environments - solid, liquid and gaseous. As examples, the automatic assembly line of printed circuit boards, the locating system for monitoring thermal networks by the method of monitoring insulation dampening, the system of catalytic neutralization of vehicle exhaust gases are considered. In these examples, the objects of activity are primary physical processes. An in-depth study of primary physical processes made it possible to obtain new informational possibilities for analyzing, interpreting and regulating the key parameters of the above systems based on computing resources.
Rationalization of the process of improving the quality of spatial control systems for unmanned aerial vehicle groupings
Authors: Semenova E G , Ivakin Ya A , Balashov V M , Smirnova M S
Published: December 2019

The article substantiates that the methodological basis for improving the quality of spatial management systems for unmanned aerial vehicle groupings, as part of the concept of monitoring and improving the quality of software and hardware systems for managing heterogeneous robotic aircraft groups and the methodological basis for qualimetric requirements for software and hardware systems for managing unmanned aerial vehicle groupings, allow to achieve rationalization of the development process and improving complexes spatial quality control heterogeneous robotic aviation groupings. Possibilities of reducing time and labor costs for the process of forming and improving the quality of software and hardware systems for managing groups of unmanned aerial vehicles are shown. It is mathematically justified that the use of one integrated model of data structures for software and hardware complexes for managing unmanned aerial vehicle groupings while streamlining the process of improving the quality of spatial control systems for unmanned aerial vehicle groupings based on the proposed methodological foundations leads to an objective saving of resources for the development of these complexes.
The influence of design features on the properties of the metal network
Authors: Testoyedov Nikolay , Dautov Osman Sh , Vygonskiy Yuri , Romanov Anatoly G , Shemyakov A O
Published: December 2019

In this paper, based on the electrodynamic model, the effect of cell pitch, yarn radius of the filament and the conductivity of the material on the network at the reflection, transmission, and absorption coefficients are studied. On the basis of numerical calculations, the fulfillment of the boundary conditions and the power balance of the incident, absorbed, and transmitted fields are shown. An abnormally high power absorption of a set of weaves was revealed at certain radii of the cross section of the thread.
On the analysis of semiconductor materials suitable for the development of a radiation-stimulated power supply based on the nickel-63 radio isotope
Authors: Kovalev I V , Zelenkov P V , Brezitskaya V V , Lelekov A T , Karaseva M V
Published: December 2019

At present, the urgent problem is the development of long-term service life of batteries. If one considers power supplies with a period of more than 10 years, and even up to 50 years of service life, then it is necessary to pay attention to the Nickel-63 radioisotope. The given isotope is safe from the point of view of radiation, but it can generate energy up to 50 years. The article shows that it is necessary to analyze semiconductor materials suitable for its development in the manufacture of a power source based on Nickel-63. Such an analysis is also important for the estimation economic requirements taking into account the increasing miniaturization of electronic equipment. A current level analysis was performed for each semiconductor material.
Optical multilayer anti-reflecting coating in the infrared range
Authors: Novikova Yu A
Published: December 2019

The constant expansion of the applicable scope of optical technologies has led to the need to create optical coatings not only with certain frequency characteristics, but also high performance properties. This article contains the results of a research of a thin optical film from an advanced material SrYF4. On the basis of this film, a multilayer coating was synthesized, which has high transparency in the near and middle infrared range. The coating has successfully passed the climatic tests on resistance to cold and heat.
Mathematical modelling for analysis of self-locking mechanical systems operation in dynamic modes
Authors: Ershov Dmitry , Lukjanenko Irina
Published: December 2019

The paper analyses possible solutions for mathematical modeling in studies of dynamic processes in dynamically self-locking mechanical systems. The research performed is based on the dynamic system with two degrees of freedom conditioned on the system’s inertial and elastic properties. The orthogonal worm gear with equal helix angles is taken as an example. The paper studies two modes of operation: forward movement and reverse movement. The resulting mathematical model allows determining parameters conditioning self-locking properties of mechanical gears.
The use of multiconductor strip structures for splitting an ultrashort pulse in its generation systems
Authors: Belousov A O , Romanchenko I V , Gazizov T R
Published: December 2019

The article explores the ways to use multiconductor strip lines (SL) for solving the problems of generating a bipolar and unipolar pulse oscillations packet. Reflection-symmetric and five-conductor microstrip structures, as well as their various configurations, which are cascade-connections of these SLs are considered. The maximum conversion efficiency of a unipolar nanosecond pulse into high-frequency oscillations is estimated to be less than 1–2%. The results are important for further research and the possibility of using SLs for such tasks.
The determination of the dependence of the cavern length on the flow velocity on an experimental hydrodynamic workbench
Authors: Radzyuk A Yu , Kulagin V A , Istyagina E B , Pyanykh T A , Grishina I I
Published: December 2019

An experimental installation for studying developed cavity flows is described, including a separator for removing free air and gases from the stream, and a device for determining the flow rate. Experiments of flow around the restriction in the form of flattened cone were carried out. The dependences of cavern sizes and pressure on the working section from the free-steam flow velocity are obtained.
Physical basis of the remote monitoring method of pile foundations of building structures in permafrost areas
Authors: Shaidurov G Ya , Amelchugov S P , Igolkin V I , Tronin O A , Radaev V V
Published: December 2019

The article discusses urgent problems for the northern regions of monitoring the integrity of piles and parameters of the surrounding soil by seismoacoustic and electromagnetic methods and the tasks of remote monitoring for a long time. The possibility of controlling the piles by measuring the intrinsic resonant frequency of the borehole by the acoustic method and the parameters of the surrounding soil using temperature and humidity sensors with an estimate of the tangent of the angle of loss of electromagnetic fields at frequencies of 0.02–1 MHz is estimated.
Development of a condition monitoring system for compressor equipment with neural network data analysis
Authors: Zyryanov D K , Bukhtoyarov V V , Bukhtoyarova N A , Kukartsev V V , Tynchenko V S , Bashmur K A
Published: December 2019

Currently, one of the most widely used and effective types of technological equipment is screw compressor equipment. Along with the fact, that such equipment has a number of advantages that determine its high efficiency, it is characterized by increased wear of important structural elements. This can lead to reduced compressor efficiencies and malfunctions that can result in emergencies. In this regard, the paper presents the results of developing a scheme for continuous monitoring of the technical condition of screw compressor units. Variants of installing vibration sensors that provide data collection of vibration diagnostics are determined. In order to automate the analysis of the collected data, it is proposed to use the method of data mining based on neural networks to recognize the technical condition. The results of testing the neural network data method of a real compressor unit are presented.
Evaluation of the efficiency of prefilter models using numerical simulation
Authors: Soloveva O V , Solovev S A , Khusainov R R
Published: December 2019

In this work, we estimate the contribution of the prefilter to the operation of the filter-prefilter system and propose two models of prefilters with curved plates. Numerical calculations of the aerosol flow in various combinations of filters and prefilters are carried out. We calculate the particle deposition efficiency of different filter models. The prefilter in the case of five and ten plates increases the limit of deposition efficiency for open cell foam material. A prefilter with five curved plates with parameters l=0.33 mm and h=4 mm is more preferably in comparison with ten plates with parameters l=0.33 mm and h=2 mm.
Problem formulation of analytical characterization of part surface layer hardened by a moving elastic indenter
Authors: Abulkhanov Stanislav , Khaimovich Alexander , Leonid Khudobin , Bobrovskij Sergej , Lukyanov Aleksey , Levitskih Olesja , Polyanskov Yuriy
Published: December 2019

The development of manufacturing engineering leads to the bill of goods expansion that work in extreme conditions and are made of new steels and alloys. Unfortunately, the traditional technological methods are not able to ensure the necessary performance characteristics of parts surfaces. Diamond smoothening is a well-behaved technological method that allows to finely controlling the quality parameters of the layer surface. However, we consider that the physical processes that occur in the interface between the indenter and the hardened surface are not well understood. A deeper understanding of the physical processes occurring in the contact zone will expand the scope of surface hardening by smoothening. In our work, we tasking the physical boundary conditions in the contact zone between the hardening tool and part surface.
Analysis of factors influencing tribological characteristics of lubricating oils and methods of their control
Authors: Lysyannikova N N , Shram V G , Lysyannikov A V , Kovaleva M A , Bolshakov A S , Kirpichenko A A
Published: December 2019

Methods and means of controlling the tribological characteristics of lubricants are presented. The advantages and disadvantages of four-ball and three-ball friction machines are considered. The analysis of factors influencing the intensity wear of the tribological conjugation of friction units is carried out. The research results of commercial and working motor oils are presented and their tribological properties are evaluated by the method of controlling the wear resistance of friction pairs.
Development of an application with a graphical user interface (GUI) to compute in parallel in the OpenFOAM environment
Authors: Chitalov Dmitri I
Published: December 2019

Means of man-computer interaction have passed a complicated path of development. Nowadays they look like visually easily understandable interfaces with graphical elements on a monitor screen. Interfaces allow forming initial data (ID) for a program and visualizing results. A major part of software has in-built graphical environments to interact with a user. Some open source environments, e.g., the OpenFOAM used for numerical simulation of continuum mechanics (CM) problems, have no in-built graphical means and are designed to operate with a command line. Even though some developers of software environment have provided their decisions of the problem, the problem remains acute as the available decisions are not lacking in drawbacks. The paper focuses on the description of features of the creation of an original graphical environment to operate with OpenFOAM for CM problems computing in parallel. With this aim in mind a list of required tasks is made out and the needed tools are designated: programming language Python 3.5, framework of graphical elements PyQt5 and development environment PyCharm. Diagrams describing structure and behavior of the developed application are worked out. The results of development and testing of the application are shown through the example of one of standard training tasks of the OpenFOAM distributive. Statements that have scientific novelty of the development are formulated, the practical use of the development is defined. A balance of work is stricken and prospects of further study in the direction are identified.
Development of an effective model of parallel processing of multimedia data on the CPU and GPU in the cloud system
Authors: Shardakov V , Parfenov D , Bolodurina I , Izvozchikova V , Zaporozhko V , Mezhenin A
Published: December 2019

The paper deals with the technology of paralleling processing multimedia data process on the CPU and GPU of the user’s personal computer. To do this, we have developed an algorithm for planning the sharing of video accelerators, which controls and distributes the load between the processor and the GPU. The main difference of the proposed algorithm is that the integral transformations include the stabilization of three-dimensional objects and textures. Defining a unique sequence number allows you to apply optimal texture filtering when scaling for each object. These actions create optimal video acceleration when processing objects.
Information technology of accounting the impact of data reduction methods on the results of classification of plant leaves
Authors: Kharakhinov V , Sosinskaya S , Dorofeev R , Dorofeev A , Bazhenov R
Published: December 2019

The paper proposes an information technology for classifying a sample of leaves of various plant species described by a set of numerical characters based on the use of various types of neural networks and a technique for reducing network learning time and improving the quality of classification. Neural networks of the multilayer perceptron type and softmax layer are considered. The application of factor analysis and auto-encoder is proposed in order to reduce the dimension of the initial feature space, which allowed reducing the time for training networks. When using factor analysis, two popular criteria were used to determine the number of factors: the Kaiser criterion and the criterion for the fraction of reproducible dispersion. The quality of classifications and the time spent on the learning process of networks are displayed in tabular form. As a result of the study, conclusions were drawn about the effect of reducing signs on reducing the training time of different types of neural networks and on the quality of classification.
GIS as a tool for creating a global geographic information platform for digital transformation of agriculture
Authors: Kotsur E V , Veselova M N , Dubrovskiy A V , Moskvin V N , Yusova Yu S
Published: December 2019

The article highlights the issues of digitabltalization of the economy of the Russian Federation, in particular, “Digital Agriculture” state program. The goals and objectives of digitalization of agriculture in Russia are discussed. The main point is made about the fact that it is impossible to create digital agriculture, which implies the introduction of “smart land use” bypassing the creation of “digital land management”. The analysis of “Digital Agriculture” project concept is given; its goals and directions are considered. “Digital land use and land management” direction has been studied in details. The authors of the article suggest introducing “Smart Agrolandscape” land information system (ZIS “Smart Agrolandscape”). The basis of this system includes a scheme of ecological and economic zoning, taking into account the suitability of agrolandscapes for arable land and fodder land use. The article presents the structure of the proposed system, its goals, objectives, purpose, and algorithm of work in the system. In conclusion, the authors of the article recommend the inclusion of ZIS “Smart Agrolandscape” into the Digital Land Use and Land Management project, due to the fact that the process of making recommendations on the efficient use of land in municipalities using this system is fully automated and does not require time, labour and financial costs; its use is maximally simplified and accessible to unlimited interested parties.
Of discrepancy prediction algorithm in the model of improve the quality of serial processes of engineering production
Authors: Ivanova L A , Charushina E B , Khodareva E V
Published: December 2019

The article discusses the decision-making model for managing inconsistencies in serial production processes based on the integrated use of statistical methods and expert assessment methods for processing information. The proposed model allows to reduce the number of non-conforming products through the forecast of inconsistencies in serial processes, both within the production process and delivered to the consumer.
Improving information support of the cadastral valuation of settlement lands with using GIS-technologies
Authors: Veselova M N , Kapitulina N A , Kotsur E V , Moskvin V N , Filippova T A
Published: December 2019

To solve problems in the field of information support of the cadastral valuation of settlement lands, the article proposes to develop a geo information system of information support of the subjects of cadastral valuation of settlement lands. The proposed geographic information system includes the results of assessments of the cadastral and market values of land plots and generated assessment cards based on the data obtained, thematic maps characterizing the efficiency of urban land use, ecological land use schemes flowing into the ecological tension schemes of the settlement lands.
Reinvestment process modelling problem solution for business activities in tourist destination
Authors: Lukyanova Yelena Yu , Kazak Anatoliy N , Shamayeva Nelli P , Darbinyan Armen
Published: December 2019

Economic units of resort and spa (recreational) sphere are budget-forming ones for southern region of Russian Federation. Development prospects for business activity investment at the mentioned area are determined by various factors that must be taken into account in modelling process either conditions of resort and spa sphere year-round functioning. Analytical estimation can be based on multivariate modelling of different investment and reinvestment decisions with differential equations applying.
The application of the theory of dynamic systems to software quality estimation
Authors: Kopyltsov A V
Published: December 2019

Hardware and software are considered from the point of view of the theory of dynamic systems. It has been shown that a program may be considered as dynamic system placed into the phase space of the program variables. The theory of dynamic systems as applied to programming allows to classify programs revealing the important quality indices of the program products which are related to the basic concepts of the ergodic theory as well as to that of information and informatics. As a program is run, possibilities (complexity) of the computer may be evaluated and important quality indices of the hardware may be appreciated from the point of view of the programming itself. This approach lets also separately evaluate the quality of both hardware and software.
Kalman filtering of coordinates determination for local positioning systems mobile objects
Authors: Krasnov Timur V , Bondarenko Valery N , Feoktistov Denis S , Garifullin Vadim F , Bogatyrev Evgenij V
Published: December 2019

The article is devoted to the study of Kalman filtering errors of the measured radio navigation parameters into the coordinates and elements of the objects movement in relation to the ground-based radio navigation system of local positioning. The stationary state of the mobile station, its uniform rectilinear and uniformly accelerated movement are considered. The use of optimal estimation of the Kalman filter allows reducing the standard deviation of coordinates by 1.5-3 times for the considered mobile station trajectory.
Information system of agricultural robotic KAMAZ cars
Authors: Orlov S P , Susarev S V , Kravets O Ja , Morev A S
Published: December 2019

The article is devoted to the development of an information system for the complex of agricultural vehicles. It is shown that with the development of intelligent technologies, wireless communications, and the Internet, the task arises of creating a single information space for agricultural vehicles. The structure of sensors and measuring instruments installed on an unmanned KAMAZ car is described. The block diagram of the control system for the set of robotic cars is presented. The general structure of the information system, which includes a navigation system, technical vision, control units, a remote diagnostics subsystem, and a data transmission system, is considered. The technical diagnostics of the units is carried out using embedded and onboard thermal imagers. Thermograms from thermal imagers are analyzed using a convolutional neural network. Deep neural network and machine learning provided high accuracy in the detection and classification of equipment failures. The decision support system generates control signals for the units and transfers information to the highest level of control of the robotic complex.
The development of the forecasting information system of HIV and tuberculosis coinfection’s outcome in inmates
Authors: Ponomarev S B , Dyuzheva E V , Vostroknutov M E , Polishchuk V E , Ponomarev D S
Published: December 2019

The research describes the development of the forecasting information system that can predict the outcome of a disease in inmates with HIV-associated tuberculosis. The aim of the research is to develop an additional high-precision diagnostic criterion giving the possibility of the timely correction of diagnostic, treatment and organizational measures for patients with HIV and tuberculosis co-infection that helps to improve the quality of medical care. The research material is based on the data from clinical cases of patients with HIV and tuberculosis co-infection who were hospitalized in a tuberculosis hospital providing specialized medical care to inmates from 2012 to 2018. (367 people). The study methodology was developed in several stages with the use of the methods of system analysis and mathematical modeling (logical-statistical method of optimally reliable partitions, the method of analysis of hierarchies, artificial neural network, methods of statistical grouping). The result of a complex multi-stage research makes possible the development of the prognostic index forecasting outcome of HIV-associated tuberculosis in prisoners. For the automated calculation of the developed index a software package was created. Interpretation of the received data allows timely correcting of diagnostic and treatment tactics in order to improve the quality of medical care and reduce the hospital mortality rate. The developed information system does not require complex and expensive diagnostic measures, it is easy to use and can be suggested to use as a screening method.
A reversible image watermarking scheme based on a new modulation mode of DCT coefficients
Authors: Bahrushin A P , Bahrushina G I , Bazhenov R I
Published: December 2019

Watermarking reversibility is one of the main requirements for medical and some other applications. In these fields even a slight change in the original image can lead to significant mistakes in the decision making process. In addition, the watermarking scheme should allow to embed a large amount of hidden data into the original image. This paper proposes a blind, fully reversible, high capacity scheme that utilizes an Even-Odd Modulation technique to modify the cosine coefficients while embedding the watermark bits. In multi-layer mode the scheme is capable to embed 3145728 watermark bits into the image of size 512x512 with the following indicators: the values of Peak Signal Noise Ratio of the watermarked images are about 70 dB, the Mean Structural Similarity Index Measure between the embedded and extracted watermarks in all cases is equal to one and the scheme allows to restore the original image with 100% accuracy. The validity and superiority of the proposed scheme is verified through extensive simulations.
Using relaxed concurrent data structures for contention minimization in multithreaded MPI programs
Authors: Tabakov Andrey V , Paznikov Alexey A
Published: December 2019

Parallel computing is one of the top priorities in computer science. The main means of parallel processing information is a distributed computing system (CS) - a composition of elementary machines that interact through a communication medium. Modern distributed VSs implement thread-level parallelism (TLP) within a single computing node (multi-core CS with shared memory), as well as process-level parallelism (PLP) process-level parallelism for the entire distributed CS. The main tool for developing parallel programs for such systems is the MPI standard. The need to create scalable parallel programs that effectively use compute nodes with shared memory has determined the development of the MPI standard, which today supports the creation of hybrid multi-threaded MPI programs. A hybrid multi-threaded MPI program is the combination of the computational capabilities of processes and threads. The standard defines four types of multithreading: Single - one thread of execution; Funneled - a multi-threaded program, but only main thread can perform MPI operations; Serialized - only one thread at the exact same time can make a call to MPI functions; Multiple - each program flow can perform MPI functions at any time. The main task of the multiple mode is the need to synchronize the communication flows within each process. This paper presents an overview of the work that addresses the problem of synchronizing processes running on remote machines and synchronizing internal program threads. Method for synchronization of threads based on queues with weakened semantics of operations is proposed.
The method of software reliability increasing for the microprocessors with multi-byte command system
Authors: Akinina Ju , Sergeeva T , Tyurin S , Khudyakov M , Achkasov A
Published: December 2019

The article considers an original way of software reliability improvement of microprocessor systems with multi-byte command system in case of errors due to accidental failure while execution of the program. Program running errors (control flow errors) mean a discrepancy in the sequence of command codes executed by the microprocessor after the failure occurrence, with the working sequence of commands. The method is based on the preliminary marking of the program memory codes with the help of an additional parity/odd bit and the formation of the signal of the command code reading by microprocessor when accessing the program memory. The article proposes the analytical relations to predict the probability of detection of control flow errors for CISC-processors with any multibyte system of commands based on statistics of commands of different byteness which is contained in the code of the executable program. Along with the detection of control flow errors, all odd errors are also detected while reading the content of any program memory cell.
Fuzzy-multiple estimates of the parameter uncertainty influence in the computing devices elements calculating theory
Authors: Storozhev S V , Storozhev V I , Vyskub V G , Hai Duong Minh , Bolnokin V E
Published: December 2019

A method for obtaining estimates for the scatter errors of endogenous characteristics in models for calculating the parameters of communication lines for elements of modern high-speed computing devices in the form of multilayer printed circuit boards is presented. The described methodology for taking into account the uncertainty of exogenous parameters of models in ratios for determining the cross-sectional area and spacing of conductors, delay parameters in short and long communication lines, allows to obtain a forecast of providing of signal integrity, providing of optimized matching of electric circuit elements, and observing of technological requirements for physical, mechanical and geometrical parameters of multilayer printed circuit boards. This technique is based on the theory of fuzzy sets and consists in using a modified form of the heuristic principle of generalization in the transition to fuzzy-sets arguments in the analytical calculation relationships for a number of the most important characteristics of communication lines. A number of examples of the application of the described technique is presented.
Inductively coupled burst oscillators in neural network information processing systems
Authors: Boriskov P P , Velichko A A
Published: December 2019

In the current study, we present a self-generating circuit based on an LC oscillatory circuit with a switching element having an S-type current-voltage characteristic. Using the example of a VO2 switch, we demonstrate that such circuits generate burst oscillations and have a specific mode of bursts synchronization using inductive coupling between generators. Such generators of burst oscillations (of a neural type) can find application in the tasks of cognitive technologies, including the implementation of pulsed neural networks.
Multi-input multiplexers and selectors as basic shifter blocks in arithmetic devices operating in floating point: comparative analysis
Authors: Ushenina I V
Published: December 2019

In case of the Field Programmable Gate Array implementation of arithmetic devices operating in floating point, the implementation of shifters is associated with some challenges. This work compares two approaches to the formation of basic shifter blocks: as selectors using carry chains and as multi-input multiplexers. Both approaches use exclusively a FPGA programmable logic. The work shows that basic blocks as multiplexers require more than twice fewer FPGA logic slices and are notable for 10-20% better performance when compared to those based on selectors.
Information technology in the educational program design
Authors: Bronov Sergej , Stepanova Elena , Pichkovskaya Svetlana , Sheluhin Artem , Panikarova Nadezhda
Published: December 2019

The system analysis of the educational process of the university considers the possibilities of automation of its certain components while design and functioning. The educational process in Russian universities is implemented on the competence-based approach. Competence is a complex of knowledge required to solve a certain type of tasks within the framework of professional activity. For each type of professional activity tasks one can specify the actions of the specialists required to solve these problems. These actions are the basis for the formation of the required competencies. The task of training within the framework of the competence approach is formulated as follows: the transition from the input competencies A to the output competencies B. To automate the design of the educational program, it is required to use the automated information systems for decision-making support.
Simulation of multi-agent interaction in the system “labor exchange - enterprise”
Authors: Zaitseva Irina , Malafeyev Oleg , Sychev Sergey , Smirnova Tatiana , Kurasova Diana
Published: December 2019

The work simulates a game with full information with two agents in the supply chain: one labor exchange - one enterprise. The strategy of the enterprise is the demand for labor resources. The labor exchange strategy is the party of labor resources. The company provides the labor exchange with information on the demand for workers, the labor exchange decides on the procurement and delivery of batches of workers. Labor resources as stocks are managed by the labor exchange. Thus, the model proposed in the work obeys the VMI (Vendor Managed Inventory) concept and is a model of cooperation between the labor exchange and the enterprise. A multi-product EOQ (Economic Order Quantity) model for a two-tier supply chain is proposed. The task is to minimize the value of the supply chain of labor resources, in which the optimization variable is the maximum level of labor shortages. The task takes into account the shortage of labor resources, monetary fines for the deficit, restrictions on the space of the labor exchange and the number of orders.
Support service information model for information systems enterprise management
Authors: Kondratieva Olga V , Gulevitskij Andrey Yu , Frolova Elena A
Published: December 2019

In the process of service support simulation of enterprise management information systems, it is necessary to break the process into several components: a significant stage of the enterprise management systems life cycle and service support as a main part of the overall process, types of work, why do we need service and results of his work. The article discusses connection between types of work with the stages of the service life cycle, as well as the connections between “reasons - work - result”, which gives a systematic view on the service and allows you to model the structure of indicators of service quality and create risk catalogs, taking into account the features of the support service.
The hardware and software implementation of the adaptive platform for an onboard spacecraft control system
Authors: Kartsan I N , Zhukov A O , Platonov A O , Efremova S V
Published: December 2019

In this paper the authors discuss hardware and software implementation solutions for an adaptable platform used in onboard spacecraft electronic equipment complexes. The proposed solutions ensure the reduction of time required for designing and manufacturing the spacecraft, increase of the export potential of communication and other services by enabling the adaptation of the onboard equipment to new protocols and technologies in the fields of communication, data processing, and control in the process of the spacecraft’s operation in orbit and expanding its hardware and software unification.
Using Blockchain-based approach for building the system events logging service
Authors: Silkina G , Barabanova M , Gazul S , Kiyaev V
Published: December 2019

The article deals with Blockchain technology, namely with its aspect of forming distributed registries. It serves as the platform for creating and storing corporate information resources which need higher protection. A lot of marketing uproar on cryptocurrency is feeding the interest in employing this technology for to enable cryptocurrency operation. But not only this factor explains the technology success. Blockchain technology also favorably compares to classic centralized registries and databases. The article describes the journaling service of data computing processes and events system, both based on the Blockchain technology. We display all the advantages of the existing Blockchain types for developing corporate journaling systems. And we also show the use of such a system for medium and large organizations, allowing for their computational capabilities and potential for scaling and developing such a system.
Methods and algorithms of technological preparation for organizing automatic surface mount of printed circuit boards
Authors: Korshunov G I , Zaicev P S , Petrushevskaya A A
Published: December 2019

The production of electronics is largely associated with the development, technological preparation and automatic surface mount of printed circuit boards. The concept of Industry 4.0 and the introduction of digital methods encompass already cover the basic processes of development and production. Technological preparation of production combines both automated operations and manual ones. The quality of manual operations depends on the qualifications and experience of the engineers. The article presents an analysis of technological preparation operations and a methodology for choosing software for design automation based on a multi-criteria model. Particular attention is paid to manual operations. The above algorithms for performing such operations are the basis for their subsequent automation.
Generation of agent simulation models by using process mining methods on the example of E-learning process
Authors: Dorrer Mikhail , Dorrer Alexandra
Published: December 2019

The main objective of this work is to develop a method for the formation of agent simulation models based on the actual business processes implementation data. To solve this problem, we used the educational process management system Moodle, ProM process mining system, and AnyLogic simulation system. The initial data of the educational process obtained from the Moodle system were processed using Process Mining methods, and a heuristic miner based on the Weijters algorithm was used. Business process models were described in the eEPC notation. The prognostic ability of simulation models constructed as a result of the application of the proposed method turned out to be quite high. The error in predicting the total execution time of the process and the total complexity of the process did not exceed 7%.
The impact of digital technology on the study of languages and the development of digital education
Authors: Mentsiev A U , Almurzaeva P H , Ashakhanova M Z , Anzorova A I , Dauletukaeva K D
Published: December 2019

This research is based on an analysis of the impact of information technology on education. It also examined the transformation of traditional education into a digital format. The paper presents the arguments of outstanding specialists in the field of education of various countries and clippings from their popular works. This paper explores the symbiosis of pedagogical and technical principles. It also shows the place of digital technology in teacher education. As special cases, here are considered the use of technology in the study of English language and modern theories of language learning.
Antagonistic interaction in an economy model with incomplete information
Authors: Zaitseva Irina , Kron Roman , Ugegov Nikita , Kolyada Leonid , Pupysheva Galina
Published: December 2019

This article discusses the simplest case of two economic entities competing in an antagonistic manner. The antagonism of the interaction of objects is expressed in the fact that the first object (leader) seeks to maximize the value of the residual of the parameters of the two systems, and the second to minimize it. Mathematical modeling of antagonistic interaction in an economy model with incomplete information is described by a separate set of differential equations reflecting the time change of quite a certain numerical parameter characterizing the state of an economic object at any given time, the value of which the governing body of this object seeks to increase by means available to it.
Methodological aspects of machine-building complex economic security from the position of innovative and investment sustainability: macroeconomic cross-section
Authors: Ruiga I R , Rogozinskiy E V , Yamschikov A S , Kovzunova E S , Teterin Yu A
Published: December 2019

The article is devoted to the formation of an assessment methodology for monitoring threats to the economic security of the Russian machine-building complex branches from the perspective of innovative and investment sustainability. The theoretical basis for the study was the results of an analysis of accumulated foreign experience and current Russian practice on the assessment of economic security at the federal and industry levels. Based on the studied approaches, taking into account the identified advantages and disadvantages, the authors have developed a methodology for regular monitoring of threats to economic security in the innovation and investment sectors, which allows not only to monitor the progress of government programs in accordance with target indicators, but also to determine threshold values as some indicators. The assessment mechanism is based on the calculation of the integral index, which is formed taking into account particular indicators that are previously subjected to complex standardization by the amount of discrepancy between their actual and threshold values, with subsequent interpretation of the assessment results from the position of risk level and identification of factors that have a negative impact. The results of the study can be used by regional and federal government bodies to monitor risks and threats in the innovation and investment sphere of the machine-building complex, as well as to adjust existing regulatory, strategic documents and improve mechanisms for ensuring the economic security of the branches of the machine-building complex.