bluuebunny/crossref_metadata_2025 huggingface dataset:
Ultrashort pulse decomposition in reflection symmetric meander lines of three cascaded half-turns
Authors: Chernikova E B , Belousov A O , Gazizov T R
Published: November 2019

For the first time the quasi-static simulation of the time response of three cascaded half-turns of a reflection symmetric meander line to the excitation of an ultrashort pulse (USP) is performed. It is shown that the output voltage amplitude is determined by the amplitude of the first group of pulses. The possibility of additional pulses in the output signal is revealed. The simulation revealed the possibility of additional pulses at the output signal whose delays are equal to the arithmetic mean values of the pulse delays. The results of the work are useful for improving USP protection devices, inasmuch as the presence of additional pulses opens up further possibilities for more efficient use of such devices as this provides increased attenuation.
V-shaped sliding bearings using micropolar lubricants caused by a melt accounting for the dependence of lubricant viscosity and porous lauer permeability on pressure
Authors: Mukutadze M A , Mukutadze A M , Opatskikh A N
Published: November 2019

The paper presents a method for formation of an exact self-similar solution of the hydrodynamic calculation of a wedge-shaped slip bearing (slide, guide) using a micropolar liquid lubricant caused by a melt of the guide taking into account the dependence of lubricant viscosity and porous lauer permeability on pressure. Based on the system of motion of a viscous incompressible fluid of a micropolar lubricant for the “thin layer” taking into account the dependence of viscosity characteristics of the micropolar lubricant and permeability of the porous layer on pressure, continuity equations and equations for the dissipation rate of mechanical energy, an analytical dependence for the molten surface profile was obtained. In addition, performance characteristics of the friction pair were determined. The influence of parameters caused by the melt of the guide, structural-viscous parameters of the micropolar liquid lubricant and permeability of the porous layer on the bearing capacity and friction force was estimated.
Calculation of sealing joints with elastic edge in PTC MathCAD
Authors: Gozbenko V E , Belogolov Yu I , Kargapoltsev S K
Published: November 2019

The article touches upon the issues of the development of engineering methods of calculating a thin-walled shell-plate seat for valve and flange sealing joints, followed by the formulation of tasks using modern automated calculation software. To achieve the purpose, the authors used Parametric Technology Corporation MathCAD (PTC MathCAD) with subroutines for the search for extremum of functions and the computational block ‘Given - minimize’. The calculation is presented in the form of algorithms consisting of three logically interrelated parts: 1) stiffness calculation; 2) strength calculation; 3) the calculation of rational dimensions. The obtained results of the calculation of geometric dimensions are tested, which eliminates a probable error in the calculated block ‘Given’ of PTC MathCAD. Among the developed engineering methodologies, the article describes the following ones: a method for calculating the rational geometrical dimensions of a shell-plate valve seat, operating under shock loading at an uncertain maximum dynamic load. It ensures that the allowable stresses in a thin-walled shell-plate seat are not exceeded. Another is a method for testing the stress-strain state of a shell-plate valve seat under static loading with a force of sealing and pressure of the working medium. The last one is the method of calculating rational geometrical dimensions of the shell-plate seat of a flange connection, which minimizes the unit stiffness (minimizing sealing force), provided that the shell-plate seat strength is ensured.
Sealing joints with elastic edge
Authors: Belogolov Yu I , Kargapoltsev S K , Gozbenko V E
Published: November 2019

It was cylindrical shell elements that were mainly considered, as technologically simpler ones. The angle of the cone α is usually accepted to be 10-15°, in order to avoid self-braking (jamming) of the loaded sealing joint. The long service life of the sealing joint implies the absence of plastic deformations of the shell element (excluding, of course, the deformation area of the sealed joint, i.e. the sealing line), therefore, usually hardened steel, bronze, forming a wear-resistant friction pair with the spool valve, are used as the material of the shell element.
Kinematic analysis of a planetary mixer mechanism
Authors: Bogdanov V S , Chemerichko G I , Anciferov S I , Bogdanov D V , Kulakov L S , Popovich A V , Karachevceva A V
Published: November 2019

The production of dry building mixtures is currently one of the most promising areas of the building materials industry due to the widespread use of its products. The mixers with a planetary movement of working bodies are best suited among the wide variety of designs of mixers for the production of these products. One of the drawbacks of planetary mixers is the contamination of the planetary gear and the ingress of lubricants into finished products. To eliminate this disadvantage, a protective diaphragm was installed to separate the tank and the drive part. The motion simulation of the rotator was created using the CAD / CAM / CAE system NX.
Accuracy improvement of inertial navigation by special methods of measurements using microelectromechanical systems
Authors: Voyskovskiy A P , Kruzhkov D M , Yakimenko V A , Kartushina N V
Published: November 2019

The article is devoted to the description of algorithmic mechanism devised for increasing accuracy of inertial navigation based on the use of low-priced (up to 1000 usd) microelectromechanical measuring systems installed on small and mini-aircraft. The proposed algorithms include a series of error model parameters updating operations, which are used to negate inaccuracy occurred upon conducting measurements and their further utilization. It is shown that not only the algorithms proposed by the authors are capable to massively increase accuracy of navigation in comparison with the unprocessed initial navigational information obtained from the measuring devices, but also allow using of low-priced microelectromechanical systems for brief autonomous navigation by integrating aircraft reference motion equations.
Modelling of the end effector movement of the SCARA-module taking into account the characteristics of the drives
Authors: Chalenkov N I , Balakin A I , Filipovich O V
Published: November 2019

The functioning of the multifunctional module based on the SCARA type manipulator (Selective Compliance Articulated Robot Arm) is considered, its characteristics and possible areas of use are described. The model, determining the trajectories of movement of the module end effector with known dimensions of its links and specified control moment is developed in MapleSim. Carrying out such an analysis allows planning the movements of the module. The results of modelling for given parameters of module links and prospects for further research are presented.
Assessment and improvement of rationality methods of modern aircraft engines design and technological solution
Authors: Kraev V M , Siluyanova M V , Tikhonov A I
Published: November 2019

The results of the research of modern aircraft life cycle structure are presented. The basic principle of a life cycle system creations is cost minimization requirement of whole aircraft and the components from designing to disposal. The proposed model is based on the analysis of life cycle aircraft by elementary components.
Optical control method of fuel atomization in combustion chambers using high-speed video recording
Authors: Malikov V N , Ishkov A V , Dmitriev S F
Published: November 2019

The article gives the description of the optical method and the high-speed video registration test bed for determining the parameters of fuel atomization in atmospheric conditions. The diagram and operating principle of the test bed are described. The experimental results of the jet parameters when atomizing rapeseed oil and diesel fuel are presented.
Preparation of disinfectant solution for use in agricultural production and processing industry
Authors: Oskin S V , Tsokur D S
Published: November 2019

To improve the ecological purity of agricultural products it is necessary to look for new ways of pest control. Earlier studies show the prospects of using electroactivated solutions – anolytes for bactericidal treatment of bee colonies. The article analyzes the problem of describing main physical and chemical processes occurring during the electrochemical water activation. It is proposed to carry out modeling of electrolysis processes in Comsol software package. As a result of the necessary settings, this package is able to describe the basic physical and chemical processes and obtain solutions with a high level of coincidence with experimental data.
Model of unreliable devices system
Authors: Korolkova L I , Mashrabov N , Panfilov A V , Siuskina Ju L
Published: November 2019

The purpose of the research is to develop a model of a production system consisting ofnparallel devices and having a standby device of lower reliability. Under complex failure conditions, a spare device in a cold standby allows quickly replacing the failed primary unit. The system operation is investigated from the beginning of work up to a certain point in timetW.A good approximation to reality is the acceptance that failure time follows general time distribution. The authored approach consists in drawing up an open scheme for the functioning system. Due to the complex failure of one of the devices, the process passes to the next state, which is characterized by residual failure time or residual time of the process. The calculation of residual durations is a feature of the investigated model, which, along with detailed schematization, makes it possible to calculate the set of state indicators and, on their basis, obtain the more general indicators of the functioning of investigated system. A numerical example is given for a system consisting of five devices.
Measures to the improvement of efficiency of a repair enterprise
Authors: Konyuhov V Yu , Gladkih A M , Semenov V V
Published: November 2019

The article considers work of an enterprise created on the basis of the repair unit of a large industrial complex. It indicates the problems in the organization of the activity of new repair enterprise and the ways of their solution, aimed at the increase of the production efficiency, including those associated with staff motivation.
Verification of the numerical method of phase enlargement of non-regenerating systems on the example of modelling the process of functioning the controlled technical system
Authors: Zamoryonov M V , Kopp V Y , Zamoryonova D V
Published: November 2019

The article verifies the numerical method of phase integration of non-regenerating systems with a common phase space of states by comparing the results of phase integration, made by the proposed method and the classical, known from the literature. The transition probabilities of the enlarged system and the distribution function of the system’s residence times in the enlarged states are compared. The results of modeling the obtained expressions are given.
Algorithmic support of automatic yield control system of a gas well cluster
Authors: Prakhova M U , Krasnov A N , Khoroshavina E A
Published: November 2019

Gas wells operation is associated with the problem of regulating their yield. Debit value must provide for meeting various criteria with some of them being mutually exclusive. Initial debit value is set under a deposit development project and then is adjusted periodically at best based on the results of quarterly hydrodynamic well exploration. However, in order to enhance operation yield of a gas well cluster debit regulation must be carried out in real time. This problem hasn’t been solved yet. The article offers a yield control algorithm for a gas well cluster consisting of three separate units: yield enhancement, yield decreasing and yield distribution among wells. Transfer from one unit to another is carried out based on the results of measuring current gas consumption rate in wells and the pressure on isolation valve building’s plumes. The gap between the allowed values of well consumption (maximum and minimum) is identified on the basis of the research of a well’s operation. Algorithm approbation was carried out in a program package for simulation, design and analysis of the operation of above-ground infrastructure and PipeSim pipeline system. The results confirmed the feasibility of the proposed algorithm and the possibility of managing operation regime of every well independently.
Mathematical model of the vibratory mill body movement with biharmonic oscillations
Authors: Bogdanov V S , Dontsova Yu A , Bogdanov N E , Voronov V P , Malysheva E I
Published: November 2019

Vibratory mills are widely used in various industries such as construction, mining, chemical, energy ones in order to obtain powders with the size of a particle less than 5 microns. Vibratory mills with harmonic oscillations of a cylindrical body are most widely used in world practice. The disadvantage of such mills is the presence of stagnant zones in the central part of the load which reach 40% of the total mass of milling bodies. This significantly reduces the efficiency of the grinding process. In recent years, vibratory mills with two drives have been used. The body of these mills makes biharmonic vibrations; as a result, the volume of stagnant zones decreases to 15–20%. We have proposed a new design of a vibratory mill equipped with two imbalanced vibration drives, the axes of which are shifted in different directions from the horizontal axis of the mill, passing through the center of mass of the oscillating system. This article discusses the method that allows one to calculate the trajectory of the mill body in polar coordinates. This method is contemplated for the first time. The resulting equation of the motion trajectory of the vibromill body takes into account: the geometrical parameters of the cylindrical body; body weight and load; weight of imbalances; eccentricities of imbalances; imbalance angular velocity; the forces created by imbalances; imbalance offset angles; spring stiffness and damping coefficient.
Optimization of material grinding in vibration mills
Authors: Bogdanov V S , Alexandrova E B , Bogdanov D V , Bogdanov N E , Gavrunov A Y
Published: November 2019

In many industries millions of tons of various materials are subjected to fine grinding. It is relevant to improve the quality of final products at minimum power consumption. Vibration mills are widely used to obtain powders with the particle size of the final product of less than 10 microns. Depending on the design of a drive from and the nature of vibrations of a grinding chamber they are divided into mills with harmonic, biharmonic and polyharmonic vibrations. The general disadvantage of such mills is stagnant zones in loading reaching 30% of the grinding body weight. Thus, the efficiency of grinding is reduced. The paper considers a new design of a rotary vibration mill without stagnant zones, which significantly increases productivity and grinding fineness of the final product. It describes the equations that were obtained to calculate the power consumption of a drive and the kinetics of grinding.
Thermal stability of the properties of germanium crystals for IR optics
Authors: Shimanskii A F , Gorodishcheva A N , Kopytkova S A , Kulakovskaya T V
Published: November 2019

Both Sb-doped Germanium and Ge-Si solid solution single crystals with resistivity from 1.5 to 7 Ω·cm were grown using the Czochralski method. The optical transmission of single crystals and the stability of their optical properties were studied by infrared Fourier spectroscopy at a wavelength of 10.6 μm and temperature range from 25 to 60 °C. It was found that decreasing the background impurities concentration leads to the reduction of the infrared absorption at room temperature while not affecting the thermal stability of the optical properties. Thermal stability of the optical properties of Sb-doped germanium single crystals increases by adding from 0.2 to 0.8 at % of silicon.
Methods of graphitized steels obtaining
Authors: Guseva E A , Konstantinova M V , Kargapoltsev S K , Gozbenko V E , Sivtsov A V , Karlina A I , Shtayger M G
Published: November 2019

The article presents the analysis of various methods for the production of steel with inclusions of graphite. The article demonstrates the effect on the process of graphitization of alloying elements, various types of heat treatment, crystallization by a pulse-continuous method.
Lamé problem for a multilayer cylinder made of nonlinear elastic materials under finite strains
Authors: Zingerman K M , Ryabova O A , Muhin D D , Kaplunov I A
Published: November 2019

The paper presents an approach to the numerical-analytical solution of the Lamé problem for a multilayer cylinder made of nonlinear elastic materials under finite strains. The dependence of the stress state of a cylinder on its inner radius after deformation is investigated and nonlinear effects are analyzed.
Group growth of polycrystalline diamond coating by MPCVD technique on a hard alloy tool with a thin blade
Authors: Ashkinazi E E , Popovich A F , Yurov V Yu , Sedov V S , Sovyk D N , Sergeichev K F , Rogalin V E , Konov V I
Published: November 2019

A coating technology for application of hardening of diamond coatings on carbide tools for treatment of mineral fiberglass based on quartz texture with chromate-phosphate cohesive (FQTCC) is proposed. The purpose of this development is to increase the edge strength of the tool. The use of the technology described above allowed, in comparison with the cutter without diamond coating, to increase the productivity of processing by 11.5 times, by cutting speed by 2.3 times, and by the minute supply by 5.0 times. The approach is based on changing the configuration of the microwave field when applying a diamond coating on hard alloy substrates in the microwave plasma of the ARDIS-100 reactor by using specially designed plateholders. This method allows for the group coating on several substrates in a single process. A simplified mathematical model for calculating the temperature of the top of the cutter during the growth of a CVD diamond film, taking into account heat transfer through thermal conductivity and radiation, has been constructed. Temperature distribution on the surface of a tungsten carbide cutter in the temperature range optimal for diamond growth was constructed. The difference between the average (experimental) and maximum (calculated) temperature in such a cutter was from 80 to 138°C.
Directional coupler on compact structures
Authors: Hung L Q
Published: November 2019

This article describes a miniature directional coupler design with two connected loops and a central operating frequency of 2 GHz. The dimensions of such a coupler have been reduced with the help of compact structures, which, in turn, reduces the cost of material. Thus, the splitter with a central frequency of 2 GHz takes only 341 mm2, which is 45% less than the traditional design at the same frequency.
Simulation of the stress-strain state of the combined rolls plates in the form of a Reuleaux Triangle Profile roller grinder
Authors: Krivov D A , Gordeev Y I , Krivova D D , Chzhan E A
Published: November 2019

This paper aims to provide specialists with the main principles of work and stress-strain state of the combined rolls plates in the form of Reuleaux Triangle Profile (RT-profile). The paper is devoted to the problem of the flow pattern of force in the material cutting zone, the kinematic-geometric characteristics, the working principles of the combined rolls and the stress-strain state of the rolls while material grinding. The additional effect of rolling is implemented in the grinder with combined rolles in a form of Reuleaux Triangle Profile while moving crushed material in at least two coordinates of the gap, also the effect of crushing and cutting is realized in the field of a cross gap between combined rolls plates, due to crushing efficiency increases (will increase). Reuleaux Triangle profile of combined rolls plates provides even load distribution.
Application of the information measuring system to improve the feeding mechanism of a roller machine
Authors: Fedotov V A , Medvedev P V , Solovykh S Yu
Published: November 2019

The article describes principles of using the information measuring system that controls a roller machine. The main indicators of efficiency of a roller machine is performance and product quality. A mechanism for feeding the roller mill is crucial when grinding grain. Automatic regulation of technical parameters of the feeding mechanism of roller machines is advisable: at low peripheral speed rates (up to 2.4-2.8 m/s) - by changing the number of revolutions of feeding rollers or the gap value; at high peripheral speed rates (2.4-2.8 m/s) - by changing the values.
Application of the Blaine Apparatus for direct assessment of different suspended mixture filterability
Authors: Beloglazov I I
Published: November 2019

The article is devoted to research work, in which an attempt is made to apply the Blaine apparatus for direct assessment of filterability of different materials. In the theoretical part of the article the main laws linking the Blaine index of the powder material and the average specific cake resistance are described. A number of experiments with materials taken from actual operating plants are carried out. To determine the Blaine-index the laboratory Blaine apparatus is used and standard tests of filterability on the batch pressure filter is used to determine the average specific cake resistance. As a result of processing experimental data and the necessary calculations direct relations between the Blaine-index and average specific cake resistance are obtained.
I-V- Characteristics analysis of betavoltaic microbatteries using TCAD model
Authors: Petrosyants K O , Pugachev A A , Kharitinov I A , Lvov B G
Published: November 2019

The complete analysis of I-V characteristics and set of basic parameters for betavoltaic silicon batteries under Nickel-63 irradiation in the temperature range from 213 to 330 K is carried out using a universal physical TCAD model. The standard TCAD optical generation model was adopted for simulation of electron-hole generation for beta particles irradiation. The pn-junction diode energy converters with real Gaussian doping profiles are considered. The simulated current-voltage characteristics of the 63Ni-Si betavoltaic elements are in good agreement with the measured characteristics.
Operation features of electrostatic vibrational energy harvester based on contact potential difference
Authors: Ostertak D I , Sinitskiy R E , Dragunov V P
Published: November 2019

The paper presents a theoretical study of the electrostatic vibrational energy harvester (e-VEH) operation features based on the work function difference between the variable capacitor electrodes. The analysis was carried out for two types of the conditioning circuits: half-wave rectifier and Bennet doubler circuits both with ideal switches and diodes. Both circuits are able to accumulate electrical energy even for low contact potential differences V
bi. Bennet doubler demonstrates higher efficiency than the half-wave rectifier. However, when the variable capacitance modulation depth η ⩾ 2 it is necessary to introduce special means to limit the voltages growth process and avoid an electrical breakdown for the Bennet doubler circuit. For both circuits with diodes the capacitor voltages become lower than those for the circuits with switches and depend now not purely on the built-in voltage V
bi and η, but also on the used diode parameters. When the values of V
bi increase the capacitor voltages for circuits with diodes tend to the corresponding voltages for the circuits with switches. There is also a strong dependence of the capacitor saturation voltage V

C1,max on inverse current of the diodes IS
. The optimal inverse current of the diodes when the highest saturation voltages are reached is found to be in the range from 50 pA to 100 pA.
Development of a power transformer residual life diagnostic system based on fuzzy logic methods
Authors: Ivanova T S , Malarev V I , Kopteva A V , Koptev V Yu
Published: November 2019

The existing methods of diagnostics and control of a power transformer residual life have been studied. The results of developing a new diagnostic system, which is introduced into a tree structure of the automated system for monitoring and control of transformers and implemented via the data mining of errors based on fuzzy logic, are presented. Operating with fuzzy sets and introducing linguistic variables, an algorithm was created using a tree structure, which is translated into a program code. The system operation principle is shown using the selected diagnostic parameters of a power oil transformer.
Comparison of methods for start points initializing of a non-parametric optimization algorithm
Authors: Pavlenko A A , Kukartsev V V , Tynchenko V S , Shigina A A , Chzhan E A , Kukartsev V A
Published: November 2019

The problem of global optimization arises in various fields of science and technology, and several different ways of solving it have been proposed. The results of the study of the effectiveness of the non-parametric global optimization algorithm are presented. A comparative analysis of this algorithm is presented. performance analysis of the algorithm based on the Ackley, Rastrigin, Shekel, Griewank and Rosenbrock function. In addition, studies were carried out for the three initial points of the distribution algorithms: the sequence LPτ, the sequence UDC, the uniform random distribution. thus, the best way to initialize the initial points of the non-parametric optimization algorithm on these test functions was identified. According to the research results, the effective parameters of the genetic algorithm were established.
Optimal parameters selection of the genetic algorithm for global optimization
Authors: Pavlenko A A , Kukartsev V V , Tynchenko V S , Mikhalev A S , Chzhan E A , Lozitskaya E V
Published: November 2019

The purpose of this work is to summarize the results of research concerning the application of genetic algorithms, since in solving problems of complex systems optimization situations often make it difficult or impossible to use classical methods. To solve this problem, research is carried out on the functions of Akli, Rastrigin, Shekel, complaints handling functions and Rosenbrock functions. The studies are conducted on three starting point scattering algorithms: LPτ sequence, UDC sequences and universal random variation. As a result of the analysis, the option of initialization, selection, recombination, mutation and coding of this algorithm according to given test functions for the data of the scatter of initial points is chosen. The effective parameters of the genetic algorithm according to the results of research are established.
Use of semantic description of reference scene for visual navigation solutions
Authors: Bodunkov N E , Pindiurina M O
Published: November 2019

This article is devoted to the description generation of reference scene applying to visual navigation problem. The authors investigate the semantic descriptions that are more resistant to changing conditions of observation, thus being an alternative to existing approaches that use raster, feature, or object descriptions. There are no publications, considering similar approach of utilization for visual navigation problem solution. In the article the original description structure is proposed. The experiments involving descriptions of various scenes under various conditions have been conducted to assess the workability of the proposed approach. It is suggested that semantic descriptions are more resistant to partial occlusion of scene objects or changes in their visual features than other description types and can be used to solve visual navigation problems.
Identification of plants condition using digital images
Authors: Braginskii M Ya , Tarakanov D V
Published: November 2019

The paper deals with the problem of evaluation of the current state of plants by digital images using color and morphological descriptors. The above mentioned problem is widely used in automated greenhouse control systems. The paper presents a procedure for identification of the state of plants. The questions of segmentation and morphological image processing are considered. Self-organizing Kohonen networks and feed-forward networks are used as classifiers of RGB images and geometric descriptors. The use of the approach described in the paper allows remote assessing the condition of plants in greenhouses, increasing productivity and reducing the percentage of crop losses.
Formation of initial point of initialization methods for optimization algorithms
Authors: Tynchenko V V , Pavlenko A A , Bukhtoyarov V V , Tikhonenko D V , Tynchenko S V , Tsvettsykh A V
Published: November 2019

The initial point of initialization method is one of the main parameters for global optimization algorithms. Many scientists are engaged in its construction. The importance of this parameter for the entire algorithm is still not proven at all. Today, initialization methods based on stochastic algorithms are used. Six algorithms for constructing multidimensional points for global optimization algorithms – boolean strings – is designed. The available algorithm is analyzed. The authors use the starting points scattering algorithms, which are: LPτ sequence, UDC sequence, uniform random scatter. A large number of algorithms relaunches is used. The best way to initialize the starting points for the non-parametric, genetic algorithm, the MIVER scheme algorithm and the collective optimization method based on the Co-Operation of Biology Related Algorithms (COBRA) for these test functions has been determined.
Methods of marketing assessment of enterprise market position based on the analysis of indicators in assortment space
Authors: Pishchukhin A M
Published: November 2019

Multidimensional space is a convenient means of presenting large amounts of information. This fully applies to the assortment space of a particular enterprise. The novelty of the approach of this study is based on the fact that a large amount of information on the sales of products of each type from the range is reduced to three integral indicators: the total sales, remoteness from the beam of norms in the plane of equal contributions and the angle of rotation of beam on image point relative to main view products. In this case, the norm beam is constructed as a locus of points with the same ratio between coordinates based on regional statistics on the types of studied products. Remoteness and rotation angle are determined in the plane of equal contributions, that is, where enterprises are located, with the same total sales. The paper shows that such a presentation allows simplifying and cheapening the marketing algorithm, increasing the management system speed of an enterprise.
Mathematical modelling of economic planning issues of cyber security and organization of information security
Authors: Mandritsa I V , Fensel A , Mecella M , Bogatinoska D Capeska , Petrenko V I , Mandritsa O V , Solovieva I V
Published: November 2019

The article presents the theoretical concept of economic protection of cybercasting as part of cybersecurity and all its elements: information security, network and Internet security against modern threats for organization. Such categories as: cyberinformation, economics of cybersecurity, and classification of the concept of «Damages from loss or cybercasting» and its value of content in the form of loss of business information are firstly introduced. For example, famous in optimal programming in math of its proposed transport task solution to search for optimum protection in view of possible threats or cybercasting the emergence of economic damages.
Mathematical modeling of economic processes in complex systems (on the example of Krasnoyarsk municipality)
Authors: Nikulina T N , Zhirnova I S , Stupina A A , Zhirnov A A
Published: November 2019

The article is devoted to one of the topical tissues of scientific research, mathematical modeling of economic systems. In the activities of the municipality mathematical modeling is of great importance, as it helps to make decisions in complex economic systems. In this article the role of mathematical modeling on the example of Krasnoyarsk municipality in the framework of socio-economic development forecasting is considered, the algorithm of mathematical modeling is presented. The purpose is to study the features of the use of mathematical modeling of complex economic systems in the activities of the municipality of Krasnoyarsk. Research methods: analysis and synthesis, methods of mathematical modeling. As a result, it is noted that this model is actually a tool for determining how the change in any indicator affects other parameters of system development.
Methods for the determination of effective management decisions in insufficient information conditions
Authors: Moiseev V V , Karelina M Yu , Cherepnina T Yu , Karelina E A
Published: November 2019

The article analyzes the methods of removing uncertainty in conditions of insufficient information for making effective management decisions in complex organizational systems. In such tasks, the choice of an effective solution depends on the state of the external environment of the study and implies the use of a number of methods or mathematical models for solving multi-criteria problems. The main methods used in cases of occurrence of a situation of uncertainty due to insufficient information are the a priori ranking methods and multiple regression analysis. However, methods based on expert judgment have a significant degree of subjectivism, and methods formed on the experimental basis and mathematical planning of research are laborious and generate uncertainty with a large number of objects or elements involved in the situation. An alternative to the above is the method of zoning, which implies dividing the set of possible states of the research environment (nature) into subsets of the dominance of individual actions. The zoning operation is an inverse parametric linear programming problem. Consequently, for solving problems in conditions of insufficient information, one can use vector optimization methods.
Formalization of dynamic scheduling for an educational center
Authors: Kozlovskaya E B , Kazakovtsev L A , Patsuk O V
Published: November 2019

The model of scheduling with the opportunity of daily adjustment, which contains four groups of constrains, is made on the basis of the analysis of the provided services features and legal requirements. Necessary scalar and matrix variables are entered. For the decision of similar tasks the methods based on combinations of genetic programming with greedy algorithms and procedures of local search, traditional for similar tasks are well proved. In view of inaccuracy of the initial sending, inaccuracy of the regulatory base, existence of inevitable noises and many other unaccounted factors, in real tasks of design (where it is required to define expiration date of the project or its cost) special accuracy is not required. Besides, the found option of distribution of resources can always be used as first approximation for more exact calculation, and specification can be made by means of much less labor-consuming methods of the perturbation theory.

A post-publication change was made to this article on 6 Jul 2020 to correct an author name.
Integrated platform solutions and quality management in the planning and organization of production processes
Authors: Goryunova V V , Goryunova T I , Lukinova O V
Published: November 2019

The article deals with the task of coordinating digital and industrial platforms in the context of interaction between the subjects of the digital economy. Digital transformation should occur against the background of the systematic introduction of modern corporate governance methods, including: investment management, project management, financial management, personnel management, knowledge management, etc. The authors clarify the possibility of using ontologically oriented intellectual methods to support planning and organization of production processes. The article shows that the use of intelligent methods in building platform solutions begins with identifying, classifying and describing the main processes of an enterprise, establishing their sequence and interconnection. The authors propose ontologically oriented methods for coordinating the management and planning of production processes. The models are presented of production data support scenarios in accordance with the requirements of business processes. In addition, in addition to the production process scenarios, the solution includes a set of typical user access scenarios and basic data transfer services by experts.
Modeling of economic processes and application of software in educational process for the development of economic competencies
Authors: Barasheva E V , Dmitrieva L Yu
Published: November 2019

The article shows the practical application of software in the educational process in the study of economic disciplines. The analysis of economic model of attraction of investments in social and economic cluster and the software developed on it at modeling of level of profitability of budgets of different levels – federal, regional and local, under the influence of various factors is given.
Machine learning in economic planning: ensembles of algorithms
Authors: An J , Mikhaylov A Y , Sokolinskaya N E
Published: November 2019

The algorithm for machine learning of a transport type model is presented for the optimal distribution of tasks in safety critical systems operating in an automatic mode without operator participation. Safety critical systems in various application areas can operate in a wide range of modes - from pure manipulation by the operator prior to their autonomous execution of tasks as part of heterogeneous group. As it is shown by simulation studies of the adaptation algorithm generalized payment matrix of the transport model to the real preferences of the decision maker, even in conditions of significant noise measurements, the proposed algorithm for machine learning model leads to a fairly rapid convergence of estimates. Normalized error from the 15th step does not exceed 10 percent. In this case, the rate of convergence of estimates is not an end in itself in the case of adaptive distribution of tasks in the group of algorithms; an important indicator is the convergence of solutions that exist above the convergence of estimates.
Dynamic model of real investment with lags
Authors: Lutoshkin I V , Yamaltdinova N R
Published: November 2019

The dynamic optimal control problem of corporation’s real investment in case of a limited budget is analyzed. Initial optimization problem is formulated as a system of linear integral equations of Volterra type. The offered model takes into account the accumulated effect of real investment and previous revenue on sales. It is supposed that the previous revenue indirectly affects the current one and reflects the influence of other factors. The accumulated impact of investment is distributed over a fix time interval. The total profit maximization problem under restrictions is stated. The existence theorem for the solutions of the total profit maximization problem is proved. The model is tested with the real data. In this case the Pontryagin’s maximum principle and numerical methods of solving the integral and differential equations are used. The results of experiment are in accordance with the understanding of optimal investment strategy. Considering it the authors state that the offered model makes a solution which is possible to increase the total profit over the planning period.
Software modelling of network traffic filtering process in information system regulating the access to Internet content via HTTP
Authors: Budnikov K I , Kurochkin A V
Published: November 2019

One of the most popular ways to restrict the access to information hosted on the network, which is necessary to comply with the requirements of security, copyright, labor regime, etc., is filtering of requests to an Internet resource by its URL. It allows using a selective approach to information resources located on one and the same IP-address and prohibiting access when necessary. It can be considered as the most balanced in terms of the advantages and disadvantages. The authors carried out simulation computer modeling of the filtering process for the information web-system, in which a filtering device is built in using specially developed software. Filter processes requested flows to a server by a group of users connected to it and countered information from a server. All network interfaces were simulated by software, and all network data flows proceeded in the memory of the simulating computer. This approach allows eliminating the influence of the network infrastructure on the operation of the model. Two filtering methods: the standard method of preliminary analysis of requests and the proposed post-analysis method were compared in the process of modeling. The decrease of the average waiting time for a response from the web-server when a user request to a web-resource passed through the simulated filtering device, which worked in the post-analysis mode, up to 14% compared to the device that worked in standard mode were shown during computer simulation. Filter throughput increased by up to 54%.
Method of analyzing computer traffic based on recurrent neural networks
Authors: Chastikova V A , Sotnikov V V
Published: November 2019

The given paper proposes a method of analyzing network traffic based on recurrent neural networks. There overview of perspective approaches for analyzing network traffic in order to detect attacks is provided. The authors investigated the largest and currently the most relevant CICIDS2018 dataset. The methods of dealing with the class imbalance in a dataset by adapting the Focal Loss function to the problem of traffic analysis are considered. There proposed method provides the effective representation of information characteristics of network packets by means of encoder subnetworks. The resulting embeddings are fed at the input of the recurrent LSTM layer. The designed network meta-architecture is potentially effective for the presented dataset as well as for relevant analogues.
Toxicological evaluation of the waste of carbonitration process at the machine building enterprise
Authors: Kuksanov V F , Chekmareva O V , Moiseeva A A , Shabanova S V
Published: November 2019

Nowadays, the principle of balanced development of the machine building industry and, at the same time, the preservation of the natural environment is fundamental in the modern world. The processes used in the technological cycles of machine building enterprises should be safe both for humans and for the natural environment. One of the types of chemical and thermal treatment of metal is the process of liquid carbonitration, which allows improving the exploitation properties of treated pieces. As a result of this technology, two types of waste are generated. For a toxicological evaluation of the waste of carbonitration process, two test cultures were chosen as model organisms: Daphnia magna and Scenedesmus quadrcauda. In the course of the study, it was found that wastes from the process of carbonitration in certain concentrations have an acute toxic effect and belong to the 3rd and 4th hazard classes.
Optimization of production processes when building a value flow map
Authors: Akimov S S
Published: November 2019

The article aims to optimize value flows using the VSM map to increase the efficiency of an enterprise. The article shows that the VSM method is a key method of lean manufacturing. It has already gained popularity. Application of the method is relevant for industrial, transport, educational and many activities. Simulation of production processes reflected as flows for two different industrial activities. This approach allowed for the use of valuation methods to optimize production processes. The approach to assessing the effectiveness of the flow has been changed, and new assessment methods have been proposed.
Simulation of temporary mechanism for self-organization of production and consumer activities of operating entities
Authors: Zhelaeva S E , Aganaeva N Yu , Garmaeva E Ts , Radnabazarova O B , Khamaganova T K
Published: November 2019

The essence of the proposed scientific hypothesis lies in the multiplicity of time forms in the economy which reflects the specifics of the fundamental economic relationships between subjects, determines the direction and pace of economic development, reveals the ability to control and regulate the process of self-organization of production and consumer activities of subjects. The purpose of the study is to investigate the structure of time in the subject’s economic space based on the methodology of interdisciplinary interaction of the concept of multiplicity of time forms. As a result, based on the synthesis of Marxist, neoclassical and evolutionary methodologies of economic theory, we justify the control effect of time on the individual’s production and consumer activities according to his/her preferences in the distribution of the calendar budget of time for working and free time. On this basis, the authors propose a model of a temporary mechanism for self-organization of both production and consumer activities of economic entities and the market economy as a whole.
Simulation-dynamic model of long-term economic growth using Solow model
Authors: Boyko A A , Kukartsev V V , Tynchenko V S , Eremeev D V , Kukartsev A V , Tynchenko S V
Published: November 2019

This article presents a simulation-dynamic model for calculating long-term economic growth based on the neoclassical model of R. Solow. The model is developed on the basis of the system dynamics method, AnyLogic tools. In the constructed model, the calculations were carried out for two variants of the long-term Russian economy development, with and without taking into account scientific and technical progress. The model was used as a tool for researching which of the development options is more profitable. As a result of experiments with options, it was found that a variant that takes into account technical progress is preferred. The conducted study allows concluding that the developed simulation-dynamic model is universal and on its basis, it is possible to conduct various researches on various aspects of the long-term development of different levels economic systems.
Pricing modeling in the housing market with urban infrastructure effect
Authors: Koktashev V , Makeev V , Shchepin E , Peresunko P , Tynchenko V V
Published: November 2019

Nowadays in many large industrial enterprises, one of the motivational incentives for hiring employees, as well as for encouraging them, is the provision of temporary or permanent use of residential real estate. This raises the question of choosing the best option of the property from a variety of proposals on the market. This article addresses the issue of estimating the value of residential property in the city of Krasnoyarsk. The descriptive signs of the apartment were not only its internal parameters, such as the area or number of rooms, but also the external characteristics that describe the environment of the apartment house. The data on the apartments were taken from the website of the apartment sales announcements and from various open data sources. The number of organizations of each type considered within a radius of 1000 m serves as a quantitative measure of the house environment. The model built using a random forest showed good results and solved the problem. The relative error of the forecast was 8%. In addition, it was shown the positive impact of the apartment external characteristics on the quality of the constructed model. As a result, an easily scalable model was built that can be applied to other cities.