bluuebunny/crossref_metadata_2025_split huggingface dataset:
The method for predicting self-collisions of multi-link manipulators
Authors: Kramar VA 
Published: November 2020

Abstract
The article proposes a method for solving the problem of predicting the self-collision of multi-link manipulators with their agreed work. The method is based on the analysis of projections of manipulator links on coordinate planes. The proposed approach will make it possible to solve the problem simple and suitable for the online prediction mode of critical positions of manipulators, possible self-collision, with their coordinated work. The developed algorithm was tested when constructing the control of an anthropomorphic robot SAR-400.
Analysis of mechanisms of using the concept of probabilities to model plausible reasoning in technical diagnostics
Authors: Litvinov E S , Daneev A V , Stepanenko D A , Stepanenko A S 
Published: November 2020

Abstract
Automated systems of support and decision making (ASDS), using knowledge bases, containing expert opinions of leading specialists in a certain type of expertise, can render great assistance in decision-making. Such intellectualized systems can be effective, in particular, in the work of a criminal investigator and conduct forensic examinations. A criminal expert is obliged not only to report his conclusion, he must justify it and at the same time, so that the investigator or the court could understand and assess whether this conclusion is correct. In order to address issues related to the improvement of forensic analysis, it is necessary to have, above all, appropriate information support. The following paper offered a number of specialized applied problems in the field of technical diagnostics, the received results can be used for intellectual support of a substantiation and decision-making also concerning questions of investigation of separate kinds of crimes or carrying out of other kinds of forensic analyses.
Mathematical model of the technological vibratory unit with electromagnetic excitation
Authors: Neyman L A , Neyman V Yu , Markov A V 
Published: November 2020

Abstract
The mathematical model of the technological vibratory unit with electromagnetic excitation is considered to its features that are important for the dynamic design problems. The model is based on the differential equations of electrical balance and mechanical balance, taking into account the mobility degree of inertial masses with spring linkages. The vibratory unit vibration properties are analyzed concerning the power voltage and frequency coupling, interacting inertia masses mobility degree, spring linkages properties, magnetic core steel magnetizing characteristic non-linearity, leakage fluxes, electric, magnetic and mechanical energy losses. The research performed for dynamical design problem solution is distinguished by a novel approach to the estimation of the capability of changing vibration properties of the movable operating element of the technological vibratory unit with an additional mass attached to it. The model design technology based on the structural modelling method supported by Matlab Simulink is proposed. The research results can be useful for specialists in vibration engineering, machines and devices durability dynamics and vibroprotection.
Computer modeling of rock massif stress condition for mining planning on overworked seam
Authors: Sidorenko A A , Ivanov V V , Sidorenko S A 
Published: November 2020

Abstract
The paper presents the results of computer modeling using the finite-element method of rock massif stress condition during the development of overworked coal seams 69 and 70 in the conditions of Taldinskaya-Zapadnaya-2 mine (Kuznetsk Coal Basin, Russia). The performed studies made it possible to obtain the distributions of stress fields around the walls in the rock massif and stress profiles, as well as stress concentrations in overworking and overworked seams. The study shows the need to consider the increased stresses from the pillars in the conditions of Taldinskaya-Zapadnaya-2 mine. It gives recommendations for the arrangement of coal roadways in seam 69 beyond the limits of increased stress zones – in discharge zones.
Estimating the distribution density function using a DOG wavelet
Authors: Timofeev V S , Isaeva E V 
Published: November 2020

Abstract
It is often necessary to obtain information on the distribution form of a random variable within the framework of statistical data analysis. There are several ways of estimating probability density distributions. Wavelet density estimators distribution of a random variable, built with DOG wavelet, would be considered. Three methods are proposed for determining the normalizing parameter, which provides a correction for the non-orthogonality of the DOG wavelet. In addition, studies have been carried out on the impact on quality wavelet estimates of parameters such as sample size, a number of coefficients of expansion, a function by series in the expression for wavelet density estimates. In the course of this process, it was noted that the quality of estimates on the smoothing parameter is substantial. Moreover, there is its best meaning. The conclusion is made that the estimate is based on DOG wavelet, provides quality recovery density functions.
Agent-based approach to modeling the process of viral marketing
Authors: Utakaeva I H 
Published: November 2020

Abstract
The space of social networks and the Internet challenge classic marketing tools and offers new, modern, effective technologies that improve consumer value. The high rate of technology change poses the problem of effective marketing. In the context of digitalization, new technologies are rapidly forming new market platforms and ways to satisfy their requirements. In this regard, marketers are forced to constantly upgrade their tools and approaches. One effective approach to improving consumer demand is viral marketing. In a highly competitive environment, many more companies are resorting to the viral marketing apparatus. Viral marketing can be based on sound marketing principles, but at the same time become a dangerous tool. Classical epidemic spread models do not take into account the features of modern viral marketing technologies and social networks. The article discusses the concept of viral marketing as a modern tool to increase the consumer value of goods and services. The advantages and disadvantages of this advertising tool are revealed. The main stages of building a viral campaign are described. The conditions under which viral marketing is developing successfully are identified. An agent-graph model of the spread of viral information based on the epidemiological approach that takes into account the basic principles of interaction in a social network is built.
Mathematical modelling of the cryogenic-dynamic start-up process in a pneumatic installation
Authors: Yerezhep D , Aldiyarov A , Sokolov D , Nurmukan A , Krutskikh B , Amangeldieva Zh 
Published: November 2020

AbstractFor studying the kinetic laws of the processes of transitional phase processes of cryo-liquids into the vapor phase, methods of mathematical modelling were used. A mathematical model was developed for the instant boiling up of cryo-liquids using the finite element method. The paper shows the results of a numerical experiment with different amounts of evaporating cryo-liquid in the same temperature range. The dependences of Von Mises pressure and pressure during cryo-liquid evaporation are shown. These studies are necessary for further detailed study of the kinetic laws of the processes of fast-flow phase transitions of cryo-liquids in a pneumatic installation for the cryogenic-dynamic startup of devices.
Problems of using neural networks
Authors: Mikheev M Yu , Gusynina Yu S , Shornikova T A 
Published: November 2020

Abstract
Currently, the urgent task is to develop new algorithms for identifying and diagnosing technical objects. Often artificial neural networks are used in solving such problems. In these tasks, most often, there is no setting the task in an explicit formal form to describe objects and phenomena, and neural networks do well in this case to solve them. The article considers various existing approaches of identification of objects based on neural networks, as well as diagnostics of technical objects based on artificial neural networks. A vision of the prospects for further development of such tasks is offered. Various methods for training the network in the case of problems of identification and diagnosis of faults are described. The task of identifying technical objects is reduced to the task of approximating data, and the task of diagnosing the state of the system to the task of recognizing images. The algorithms for selecting the optimal network structure are investigated. The advantage of using software and hardware technologies in the construction of neural network algorithms has been evaluated. The results of the article can be used in constructing a scheme of actions of identification and diagnostics of technical objects using artificial neural networks.
Second-order aperiodic link modelling with the use of Siemens programmable logical controller SCL hardware
Authors: Urasov D , Cherniy S , Bazhenov R , Alekseeva L , Korosteleva I 
Published: November 2020

Abstract
The paper focuses on the features of modelling the elements of control systems using non-standard tools, in particular, based on the resources provided by industrial logic controllers. The authors point out the features of implementing such models, the control program for an industrial logical controller, as well as the forwarding algorithm for control data to regular simulation modelling tools. A comparative study of the obtained properties with models built in the environment of engineering computing proved to be appropriate to use such hardware and software to solve problems of that kind.
Electric machine with combined excitation in transport
Authors: Kaluzhsky D L , Biryukov V V , Mekhtiyev A D , Alkina A D 
Published: November 2020

Abstract
One of the factors of the electric rolling stock competitiveness of any type of transport is the amount of energy consumed by its electric drive for transporting passengers. During movement, most of the energy is consumed as a heat energy loss in electric traction machines. It is especially important to reduce energy losses in the drive of vehicles with an autonomous power plant. In order to reduce losses in the mechanical part of drives and to increase reliability of their work, it is advisable to use an individual electric drive for each wheel of the rolling stock running gear, especially rail vehicles. In the electrical part of the drive, most of the energy loss is due to the traction motor. Electric motors with the rigid electromechanical characteristic are known to be most suitable for electric traction. These include electric machines with a combined excitation system, which can significantly increase their efficiency and reduce energy consumption by regulating the magnetic field of the machines. The article discusses one of the options of this kind of machines.
Investigation of possible paths to implement the planar 3RPR robot movement along a predetermined trajectory
Authors: Kuzmina V S , Malyshev D I , Gaponenko E V , Khalapyan S Y , Rybak L A 
Published: November 2020

Abstract
The paper considers various possibilities for implementing the movement of a robot of the parallel structure along a pre-calculated trajectory. A computational experiment using a model of a planar 3-RPR mechanism with direct current drive electric motors made it possible to study the accuracy characteristics of the robot depending on the selected mode of changing the tasks of controlling the length of its drive links. During the experiment, various possibilities of realizing the movement of a parallel robot along a pre-calculated path were investigated. The best mode, ensuring a minimum of dynamic deviation of the actual trajectory from the given one, is now recognized as a uniform change in the tasks of the control loops of the length of the drive links in time using linear Lagrange interpolation.
Towards the development of a toolkit for assessing the critical competencies of agricultural sector employees
Authors: Aletdinova A A , Kiprisheva A I 
Published: November 2020

Abstract
One of the tools for assessing the critical competencies of employees can be an expert system. The authors conducted a theoretical study of critical competencies and identified the following groups relevant in the agriculture: intellectual-educational, communicative, motivational-volitional, management, networking, environmental. Considering competences as variables of the expert system, it is necessary to determine the method for obtaining their values. Today there are no methods for assessing critical competencies. Therefore, the authors decided to use the results of the survey of respondents after the adaptation of existing methods for determining personality characteristics in psychology. Based on the correlation analysis of the results of the survey, the authors excluded the multicollinearity of competences and selected significant variables that were recommended for use in creating an expert system.
The cascade equivalent A-H-circuit of the DC machine
Authors: Blanc A V 
Published: November 2020

Abstract
Cartesian and cylindrical laminated models are well known in the electromagnetic calculations of electric machines. In such models, the general solutions of partial differential equations are transformed into the four-terminal circuit equations, and this allows synthesizing the cascade equivalent circuits of electric machines. In salient-pole machines, the solutions of partial differential equations are formed on the base of the piecewise continuous Sturm-Liouville eigenfunctions. However, in this case, the cascade equivalent circuits cannot be synthesized since it needs many piecewise continuous functions in the zone of poles and many smooth functions in the zone of the air gap for ensuring the uniqueness of the solution. For this issue, the approximate method is offered. This method is based on the single piecewise continuous Sturm-Liouville eigenfunction in the zone of poles and many smooth functions in the zone of the air gap. The method allows transforming the analytic solution of the partial differential equation into the four-terminal circuit equations and synthesizing the cascade equivalent circuits of the salient-pole electric machines. In this paper, the synthesis of the cascade equivalent A-H-circuit of the DC machine is considered. The active cell that corresponds to stator poles is synthesized on the base of the solution of Poisson’s equation with the single piecewise continuous Sturm-Liouville eigenfunction.
Investigation of plasma-ohmic electric furnaces for gasifying carbonaceous wastes
Authors: Domarov P V , Anshakov A S , Aliferov A I , Sherednichenko V S 
Published: November 2020

Abstract
For the first time, the processes of reducing the energy consumption of a plasma-ohmic electric furnace for the gasification of various carbon-containing wastes (municipal, biological, agricultural, and other organic wastes) were investigated. The effect of reducing the humidity, the morphological composition of waste on energy consumption during plasma gasification of carbon-containing materials is shown. The possibility to exclude the process of preliminary drying from the production cycle of waste gasification has been revealed.
Species of vacuum chamber design with cryogenic cooling for strontium optical clocks
Authors: Gurov M G , Gurova E G , Rozanov S B , Slyusarev S N 
Published: November 2020

Abstract
The paper briefly reviews the reasons for the optical clock resonance shift due to thermal radiation. The ways to decrease thermal radiation influence with modification of the spectroscope by introducing of the cryogenic elements as an environment of the atoms from a cryogenic nozzle to create special internal chamber with the example of 87Sr optical clocks are shown. The possibility and usefulness of using the double-circuit dual-mode cryogenic chamber to suppress thermal shift in a strontium optical clocks are considered. The selection of the each element material of the chamber is based on simulated thermal distributions and heat flows of these elements. The detailed concept of this double-circuit dual-mode chamber and calculation of the shifts from each element of this chamber are also presented.
Physical approach to analysis of induction motor braking under machinery load
Authors: Sattarov R R , Morozov P V 
Published: November 2020

Abstract
The mechanical braking process of induction motors during short interruptions, and full switching off is studied in the paper. The approximate approach to solving a differential equation is used for the theoretical analysis of the braking process. The comparison of this approach with the exact solution shows its good accuracy. The used procedure is simple for a deep understanding of physical processes. It is shown that good results could be obtained for both full-stopping and braking due to sags if the right collocation point is chosen. This approach could be used for the study of different transients in electric motors and drives. It helps beginner students to understand clearly the main features of transients. However, it is also useful for experienced engineers who can easily obtain design formulas.
Electrical processes analysis in a wireless power transfer system for electric vehicle battery charging
Authors: Novolodskiy M V 
Published: November 2020

Abstract
The article considers the electrical processes taking place in a wireless energy transfer system for charging the battery of an electric vehicle. The main way to transfer energy through the airspace between the road and the electric car is the inductive coupling of two coils. It is known that the efficiency of the system increases if electric resonance is established in two independent circuits. The choice of the resonant frequency largely depends on the resonant circuit. The work aims to analyze a series-series resonance circuit and justify the choice of a resonant frequency for a given topology. As a result of the study, the author has obtained the dependences of the active and reactive resistance on the frequency, the possible resonance conditions, and a bicubic equation that allows calculating the resonant frequencies for those two types of resonance. Moreover, a computer model has been created, the parameters of which determined the optimal resonant frequency. This research work helps to choose reasonably resonant frequencies depending on the required efficiency of the system with a series-series resonant circuit.
Hardware open cyber-design
Authors: Shukalov A V , Kabanova N V , Zharinov I O 
Published: November 2020

Abstract
A relevant method of development of hardware equipment is an open cyber-design (OCD) to provide a collective method of the improvement of item constructive features. An OCD is an initiative interaction of qualified co-designers of the same product where all of the item constructive defects are revealed and corrected publicly. The OCD service tools support special digital platform (DP) solutions done on the basis of a communication net and containing a multi-user interface. There is an interaction scheme given for the open project (OP) co-designers and DP solutions. A collective way to design a product helps to implement some artful ideas from a third party specialist using the working space editors, which develop project works multi-system automatizing methods. The OP administrating is based on the designing stable mechanisms management, which may help to develop in several parallel products with a DP solution. The OCD results are the product itself, which technical specifications correspond to the co-designers independent group requirements. The OCD is an Industry 4.0 sub-technology to modify the existing project technologies and their application ways in the industry.
CAM-spring mechanisms for pantographs of electrically propelled vehicles
Authors: Sopov V I , Rykov A A , Malozyomov B V , Druzhinina N S 
Published: November 2020

Abstract
The process of current collection with a non-autonomous power source used for electric motors of a rolling stock occurs in a contact pair: pantograph’s skid (head) - contact wire. The main indicator of the quality of current collection is the contact pressure, which depends on many factors. The dominant factor is static pressure generated by spring mechanisms of the pantograph. The pressure is a result of dynamic and other random factors. It is difficult to keep it constant. One of the solutions for optimizing contact pressure can be a cable cam-spring mechanism installed in the lifting unit of the contact part of the pantograph. Due to the special cam shape, it is possible to stabilize forces of the contact insert. Static pressing does not depend on its altitude. Dynamic forces can be smoothed.
Fuzzy sets visualization for decision-making processes in social studies
Authors: Berestneva O , Marukhina O , Romanchukov S 
Published: November 2020

Abstract
This paper is devoted to visualization of multidimensional fuzzy series and describes analysis methodology based on images that can be built after the initial time series transformation. It is shown that the most rigid structure of a fuzzy number is the number of components with the highest value of membership function. Built in accordance with the proposed method a series of visual images reflect the tendency of the fuzzy time series. The application of fuzzy time series visualization facilitates the identification of high-quality bonds in the consideration of dynamical semi-system (including social and economic). The proposed approach allows a qualitative level to solve the problem of grouping, structuring and forecasting in such systems, but there are doubts in numerical accuracy and quality.
Design of AIS control movement of raw materials in the industrial enterprise’s warehouse
Authors: Movchan I N , Belousova I D , Makhmutova M V 
Published: November 2020

Abstract
The article presents one of the possible solutions to the problem of controlling the movement of raw materials in the warehouse of an industrial enterprise. A solution to the problem is proposed by designing an automated information system for controlling the receipt and movement of raw materials in the warehouse, which will greatly facilitate the work of employees, provide an opportunity to reduce management costs by freeing up human resources, allow monitoring the process of accepting and storing raw materials, and storing and analyzing data for any period time, search for the necessary information according to various selection criteria. Testing of the research results was carried out by introducing AIS control of the movement of raw materials in the warehouse of an industrial enterprise.