bluuebunny/crossref_metadata_2025_split huggingface dataset:
The use of the system dynamics model to determine the probability of company default
Authors: Kurennoy D S , Golembiovsky D Yu 
Published: February 2021

Abstract
This research demonstrates the approach of using the system dynamics model to assess the probability of company default that is a relevant problem in credit risk analysis. System dynamics offers models in which the reality is simulated structurally. According to the principles of system dynamics, the company is represented in the form of continuously interacting elements and external factors. Enterprise dynamics and the enterprise’s resistance to various macroeconomic environments are determined by functional dependencies and differential equations that describe the links between the elements of the model. The behavior of random macroeconomic variables is described with a multivariate ARIMA-GARCH model, which is used in econometrics to predict non-stationary time series. The probability of company default is determined as a result of experiments with the obtained system dynamics model using the Monte Carlo simulation. The estimation of a default probability is the overall share of macroeconomic scenarios leading to the ruin of the enterprise. A comparative analysis of the obtained results and data from Moody’s and Fitch demonstrates the closeness of the probability of company defaults obtained by simulation and corresponding estimates of rating agencies, which makes it possible to conclude that the considered approach is acceptable for estimating the probability of default of a borrower.
Electrical component base testing in process of spacecraft configuration
Authors: Mikhnev D L , Erygin Y V , Rozhnov I P 
Published: February 2021

Abstract
In current conditions and according to the quality level of Electronic Component Base of domestic production and due to the purchase of significant amount of electronic component base of foreign production - additional screening testing, diagnostic non-destructive testing with selective destructive analysis in professional testing centers are necessary. Costs of their performance are insignificant compared to possible losses of material (and not just material) while using spacecraft with bad quality of electrical component base. The authors show the need for additional testing of electronic component base applied in on-board equipment of spacecraft.
Building the strategy for innovative development of industrial enterprises based on network planning methods
Authors: Stupina A A , Antamoshkina O I , Ruiga I R , Korpacheva L N , Kovzunova E S 
Published: February 2021

Abstract
The article substantiates the need to adjust corporate development strategies, business models and production methods, caused by the influence of the fourth industrial revolution (Industry 4.0). Cluster and network structures are capable of ensuring timely digital business transformation. For effective integration into network interaction, it is necessary to form corporate strategies for innovative development based on an effective combination of strategic and operational planning using network methods. The article provides a comparative analysis of the critical path method, the method of evaluation and analysis of programs and projects, the method of graphical assessment and analysis, and the cyclical alternative network model. As a result of the study of network planning methods, it was revealed that the GERT-network modelling allows taking into account the risk factors and uncertainties, and the cyclical alternative network model allows to manage the level of risk and uncertainty. The two-level model of planning and management of industrial production proposed in the article, as well as the developed algorithm for solving the problem of interdepartmental production planning, can be used as the basis for the formation of a strategy for the innovative development of industrial enterprises.
Cyber-control of groups of technological aggregates
Authors: Shukalov A V , Zharinov I O , Zharinov O O 
Published: February 2021

Abstract
Groups of technological aggregates creates a production cyber-segment being controlled autonomously. Electrical automatics aggregate elements are described as some control theory terms with kinematics and dynamics tasks laws being completed. Cyber-control system of groups of machines in production is built as a multi closed-loop scheme with typical two or three loops tracking channels. There is a multi-loop production cyber-control scheme given. The cyber-control specifics include the additional virtual and traditional physical tracking system. The aggregate virtual tracking system control signals are registered in parametric settings of physical tracking system regulators. The aggregate situation cyber-control is done with a digital production avatar.
Troubleshooting technological aggregates based on machine learning
Authors: Kosarevskaia S A , Shukalov A V , Zharinov I O , Zharinov O O 
Published: February 2021

Abstract
The technological aggregates preventive maintenance problem being researched is resistive against a type of failures. The preventive maintenance is a cyber-production control system function and is done by activation of re-arrangement manipulation system, which is used to eliminate technological aggregates failures. The technological aggregates restoration operation technology is viewed as a man substitution in the Industry 4.0 paradigm. The equipment failure is viewed as an incident of cyber-production functional safety system, which is capable to cause a potential complex damage. The equipment robotized maintenance model is oriented to increase the cyber-production functional reliability and to use the machine learning methods to make intellectual the industrial automatics. They analyze the repair and restoration works mechanisms in the process factory level (the physical workshop) and in the analytical factory level (the virtual cloud) for a cyber-production, which interact with operation system. There is the equipment robotized maintenance algorithm proposed, which gives the data to the control system for its actual state. There is the automatic control system scheme proposed to make a technological aggregates preventive maintenance. An option how to change a failed unit is selected after the technological aggregates conditions pre-history analyzing obtained in the stage of machine learning of collected statistics.
Modification of carbon fiber by magnetite particles
Authors: Kornilitsina E V , Lebedeva E A , Astaf’eva S A , Trukhinov D K 
Published: February 2021

Abstract
In order to expand the application range of carbon reinforced composite materials in shielding field, this paper aimed to modify the chopped carbon fiber (CF) by magnetite particles with ultrasonic treatment. The modification was carried out in three stages and the increasing amount of the cover was proved by TGA analyze. SEM analyze is showed the most part of CF surface was coated by magnetite particles Fe3O4. Also it was noticed some agglomeration on each stages what is possibly connected with high surface energy of these particles. The chemical compound of the coating corresponds to ferrous oxide (II and III) what is confirmed by Raman spectroscopy.
Elastic compounds based on epoxy terminal oligomers synthesized on the basis of an oligoester
Authors: Slobodinyuk A I , Senichev V Yu , Pogorel’tsev E V 
Published: February 2021

Abstract
The physico-mechanical and structural characteristics of a series of elastomers based on epoxy terminal oligomers synthesized using a crystallizing oligoester were investigated. It was found that the use of isophorone diisocyanate allowed obtaining polymeric materials with a noticeable advantage both for the physical and mechanical characteristics, and for the temperature diapason of application as well. It was shown that the mentioned advantage of isophorone diisocyanate could be explained by the higher degree of microphase separation between soft and hard blocks in the polymeric matrix constructed using this component. New materials can be used as a base for compounds for various purposes.
Development of gradient polymer composite and technology for its production for revolved parts with increased surface wear resistance
Authors: Sharshin V N , Sukhorukov D V , Sukhorukova E V 
Published: February 2021

Abstract
The work is aimed at creating polymer composite materials with desired properties. One of the ways to create such materials is to create gradient layers characterized by a smooth spatial change (gradient) of properties in the direction of one or two coordinate axes. The results of studies on the rotation of the polymer composition at the time of polymerization are shown. A device for producing polymer composite materials with a gradient layer has been created. The values of the distribution of additives and hardness along the height of the samples are given. Mathematical processing of the experimental results was carried out.
An ordered ranking multi-attributive model for decision-making systems with attributes of control systems software
Authors: Efremova S V , Kartsan I N , Zhukov A O 
Published: February 2021

Abstract
The authors present a compensation model for the general ranking of alternatives in their order of preference, considering the dependence of the attributes of software for spacecraft control systems. Among the discussed features is one that consists in the use of a set of target functions, which cannot be optimized simultaneously, due to their inherent incommensurability and target conflict.
The role of information technologies in ensuring banking security
Authors: Kondratyeva M N , Svirina D D , Tsvetkov A I 
Published: February 2021

Abstract
In this paper, using practical examples, the author dwells on the possibilities of innovative technologies in banking. The necessity of implementing modern security systems to create a safe business space for banks is substantiated. The main trends and leading technologies in the area of information security are considered. The importance of tracking threats and risks associated with user information and resources in a fast and timely manner is emphasized. The article highlights modern information technologies and methods aimed at strengthening business processes, the implementation of which increases security of financial organizations and their ability to resist external threats. In the article, the technologies and methods described include Paperless Office technology, deactualization risks, social engineering, biometric identification, psychology of information security (from here on, IS-psychology), regulatory and supervisory technologies. The advantages and disadvantages of modern information approaches to solving problems of external threats discussed in the article are described. The objective of this research is to justify and reveal the importance of innovative technologies in maintaining the necessary level of security, as well as improving the protection and resilience of domestic banking systems in terms of external threats. General scientific methods are used as research methods: analysis and synthesis, generalization, interpretation of graphic information, as well as statistical analysis. The results of the study allow to claim that the development of innovative financial technologies and the digitalization of business processes in banking lead to systemic contradictions in the balance between the potential benefits of and damage to the system of financial relations. On the one hand, the emergence of modern innovative technologies provide the opportunity for the banking sector to improve and modernize the processes of its activities, and on the other hand, the very same advanced technologies can be used by scammers, which produces a detrimental effect on both banks and consumers. It appears to be so due to the fact that advanced technologies are relatively new and just being implemented into banking, which is characterized by the presence of both merits and downsides.
PID controller in the steering unit with the Ackermann principle
Authors: Mishin S A , Vasilyev S A , Limonov S E 
Published: February 2021

Abstract
The scientific article offers a model of a commutator motor control based on the study of actual data received from the shaft position sensor. As a result of theoretical research, the feedback control of the electric motor was realized. The tractor steering system was studied to adjust the steering shaft position correctly in real time. It should be noted that the error of angular velocity control was less than 2%.
Investigation of stripline parametric passive radio transponders
Authors: Babanov N Yu , Klyuev A V , Lartsov S V , Samarin V P 
Published: February 2021

Abstract
The results of the study of strip parametric passive radio transponders are presented. Stripline parametric passive radio transponders are made in the form of a system of three parametric generators connected to the pump signal strip antenna and the response signal strip antenna. The results of numerical and field experiments are presented for a pump signal frequency of 800 MHz and a response signal of 400 MHz, which are in good agreement.
Cooperative self-configuring nature-inspired algorithm for a scheduling problem
Authors: Semenkina O E , Popov E A , Semenkin E S 
Published: February 2021

Abstract
One of the crucial challenges related to operational manufacturing planning is an optimal plan search in the current situation using a workflow model. The problem solving is greatly hindered by the rapid growth of the search space with an increase in dimension or the so-called combinatorial explosion. This paper uses two different approaches to solving a hierarchical scheduling problem based on different solution representations. The first approach assumes a search of an optimal project order and then solving of resource-constrained project scheduling problem (RCPSP) for each of the projects using a model based on the greedy principle. In the second approach we are searching for priorities of all actions of all projects and then use them in the process of building a schedule if there are any conflicts when choosing the next action. To solve the problem with both approaches, the paper considers some nature-inspired algorithms such as the intelligent water drops algorithm (IWDs), a genetic algorithm (GA) and ant colony optimization (ACO) as well as a self-configuring version of the last two. The paper shows the efficiency of the application of the coevolution algorithm using IWDs, self-configuring GA and ACO.
Algebraic analysis of SM4 cipher using SageMath
Authors: Maro Ekaterina 
Published: February 2021

Abstract
The article consider possibility of applying the algebraic analysis method to the Chinese national standard (SM4 cipher). Research presents approaches to algebraic analysis of the reliability of symmetric block ciphers by solving Boolean satisfiability (SAT) problem. The principle of formation of the SAT problem for algebraic analysis of SM4 cipher is proposed, as well as the parameters of the obtained SAT problems.
Synthesis of an automatic temperature controller with sequential switching on of the correcting links
Authors: Antipin D Ya , Bondarenko D A , Vorobiev V I 
Published: February 2021

Abstract
The paper presents a method for the synthesis of an automatic control system regulator by means of integral assessment, which provides tuning to the technical optimum in the case when the object of control is a high-inertia process - control of the temperature of the traction motor. The proposed correction scheme assumes that a PI controller and a low-pass filter are connected in series together with the control object. The data obtained as a result of the modeling indicate satisfactory values of the quality criteria of the control process. It was found that overshoot and control time in a closed-loop automatic control system increases with an increase in the temperature setting, with an increase in the initial temperature, overshoot decreases, control time increases, with an increase in the load current of the traction motor, overshoot decreases and control time increases.
Use of the modern information technologies for continuous monitoring of transport infrastructure
Authors: Zolkin A L , Domracheva E A , Losev A N , Avdeev Yu M 
Published: February 2021

Abstract
The concepts of universality and general applicability of information networks as well as the issues of using networks in specific directions are considered in the article on the example of the convergence of transport infrastructure and information networks. An analysis of modern information networks has been carried out and the following three main directions have been identified: infrastructure as a service, platform as a service, software as a service. The article examines the issues of automation of the customer relationship management by introducing a CRM system in order to improve transport support and logistics services provided by companies at the competitive market of logistics services. The basic principles of convergence of information networks and transport infrastructure are presented on the example of a transport and logistics system. The issues of use of the modern information technologies for continuous monitoring of transport infrastructure are considered.
Applicability of information technologies in energy conservation
Authors: Gorohov M M , Vologdin S V , Ponomarev S B , Popova N M , Ponomarev D S 
Published: February 2021

Abstract
The article describes the computational complex designed for large-scale mathematical modeling and optimization of intra-quarter thermal regimes heating networks. Developed software allows to manage all users of thermal energy and carry out its accounting. On its basis, a strictly analytical system of targeted budget subsidies to individual consumers of thermal energy can be built, taking into account the social norms of housing, the estimated and actual power of heating devices, the location of the apartment in the house and the state of its enclosing structures. The article concludes about the effectiveness of the proposed mathematical modeling method in the organization and effective management of ensuring energy saving in the design of heating networks.
Neural network technologies in system synthesis
Authors: Filatova O E , Bashkatova Yu V , Shakirova L S , Filatov M A 
Published: February 2021

Abstract
Work of artificial neural networks does not ensure the identification of order parameters (which are the principal diagnostic characters xi
in biomedicine). We suggest to eliminate the 1st type uncertainties (when samplings xi
statistically match for different physiological states of a human body) by introducing random setting of initial weight values wio
of xi
and subsequent multiple repetition (n≥1000) of artificial neural network settings. The xi
ranking is made according to the weight samplings wi
collected after such settings are applied.
Structural synthesis of converters of natural temperature differences
Authors: Aleynikov A F 
Published: February 2021

Abstract
The work is aimed at using structural synthesis methods to find the principles of operation of a heat converter operating in mountainous regions and outer space. The idea of a converter of temporary temperature differences in motion is proposed. The technique is based on the structure synthesis of substance and energy transformations with selection of the most rational combinations of physical phenomena and using of material properties where said phenomena manifest themselves. It has been considered the operation principle and described the construction of heat converter engine which can operate under extreme conditions, for example, with elevated radiation and low temperatures in space.
Mathematical characterization of fluid compressibility impact on fluid drive’s output parameters
Authors: Lunev A S , Sokolov D A , Litvinchuk M V , Dunaeva S P , Andreychikov I V 
Published: February 2021

Abstract
All hydraulic drive fluids may contain undissolved gas to varying degrees. The urgency of an issue is induced by the fact that the high compressibility of liquid and gas mixture can affect the characteristics of fluid drives. The article concerns mathematical model of fluid drive which allows assessing the degree of influence of working fluid gas content on the character of parameter changes.
Research of problems of computer networks expert systems
Authors: Zolkin A L , Losev A N , Gridina D V , Aygumov T G 
Published: February 2021

Abstract
The article is dedicated to the issues of development of expert systems in data-processing networks during web programming. The dependence of the processing, storage and transmission of information and web applications on the uniqueness and problematics of expert systems creating is observed. The process of development of a software control block of content (engine) as the own control system is considered in details; vulnerabilities and a set of necessary functions inherent in the specified engine are explored. Each new developed software engine can be exposed to unauthorized access and content theft, in this regard, sometimes it is worth considering the percentage of uniqueness of the development methodology and code. In this case, the control block (engine) must be written using its own unique variables and file names, which will help secure the site from third-party interference and will not require the purchase of more expensive hosting for its placement. In addition, the article investigates the problems associated with the threat posed by malicious programs in computer networks, such as direct DDOS attacks, identifies the features of such programs, and also provides ways to combat them.
Algorithms for implementing optimization models for developing multi-version software for spacecraft control systems
Authors: Efremova S V 
Published: February 2021

Abstract
In this paper, the author discusses conventional algorithms for implementing optimization models for developing multi-version software for spacecraft control systems. The proposed algorithms are represented by implicit search procedures, including an implicit search algorithm with the search area being intersected by neighboring points, and a set of algorithms based on the general scheme of the branch and boundary method.
Mathematical model of the waveguide pipe heating in the process of induction brazing
Authors: Tynchenko V S , Milov A V , Kurashkin S O , Petrenko V E , Tynchenko Ya A , Rogova D V 
Published: February 2021

Abstract
The article presents a mathematical model of pipe heating in the process of induction brazing of waveguide paths. The object of research is the technological process of induction brazing, in particular, the regularities of energy distribution over time over the volume of the pipe Assembly of the waveguide path. The purpose of creating the model is to improve the quality of control of the production process of waveguide paths based on induction heating. The presented models will be actively used in the development of an algorithm for adaptive (intelligent) control of the technological process of induction heating of waveguide path assemblies in order to achieve uniform heating of the brazed elements to form a high-quality one-piece connection.
The Kulish-Sklyanin type hierarchy and spectral curves
Authors: Smirnov A O , Gerdjikov V S , Aman E E 
Published: February 2021

Abstract
A poorly studied version of the three-component vector nonlinear Schrodinger equation, called the Kulish-Sklyanin model, is considered. Using the Dubrovin method, we obtain recurrent relations that allow us to obtain all equations from the corresponding hierarchy. The first two equations of the Kulish-Sklyanin hierarchy are found. It follows from these equations that the Kulish-Sklyanin model is associated with a rather non-trivial nonlinear interaction of the solution components. In particular, it is shown that the behavior of the third component of the solution of equations from the Kulish-Sklyanin hierarchy is completely determined by the parameters of the other two components. The equation of the spectral curve of the solution in the form of a plane wave is obtained.