bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mathematical model of changing the combined cutting tool durability
Authors: Sokolova I D , Beckel L S , Pilipushko A Yu 
Published: February 2021

Abstract
The article provides information on the development and study of a mathematical model for changing the durability of a new progressive combined tool. Currently, one effective way to increase productivity in automated manufacturing is to concentrate operations or transitions. With a high degree of operations concentration, the complexity of the kinematics of the equipment increases, its reliability decreases, therefore, downtime and the production cost are rising. The transitions concentration leads to the tool design complexity increasing, while the equipment can have simple kinematics of movements. The compatibility of operations or transitions depends on the required machining accuracy and surface roughness. The accepted procedure for performing operations and transitions determines necessary tool type. The most efficient concentration of operations or transitions can be achieved by using combined tools. Combined tools can be used in the treatment of both stepped and smooth cylindrical holes, which make up 35% of all surfaces used in mechanical engineering. Therefore, this study is devoted to solving the problem of increasing productivity and reducing the cost of threaded holes processing through the use of a new combined tool called the drill-tap.
Impulse mode of physical and technical gases parameters control based on the jet force action effect
Authors: Makarov V A , Korolev F A , Tyutyaev R E 
Published: February 2021

Abstract
This paper presents the results of research on the use of the jet force action effect for physical and technical gases parameters monitoring systems and devices. Authors considered and proposed the impulse mode of physical and technical gases parameters control based on the jet force action effect, which provides high accuracy and sensitivity measurements, and presented possible control devices based on the use the impulse mode of physical and technical gases parameters control: the density sensor used for single-component gases parameters control and the sealing capacity control sensor used for binary mixtures parameters control. For each device were determined static characteristics and the physical, technical and design parameters, which ensure a high level of sensors accuracy and sensitivity.
Transportation and logistics system for preparing areas to unload material resources in the absence of port infrastructure
Authors: Kravets Yu D , Shuvalov D V , Yermoshin N A 
Published: February 2021

Abstract
The transport system of any state is a determining link in the development of the economy, the implementation of internal and external political and military goals. At the same time, in most countries, water transport is one of the key modes of transport pursuing state interests. Despite the fact that recently the development of remote territories has reached a fairly high rate, the full development of the port infrastructure does not always meet the needs of logistics enterprises and organizations. At the same time, the need to unload material resources to the unequipped coast has sharply increased. The issue of improving technologies and developing technology in organizing the unloading of material resources on an unequipped coast has been discussed for a long time, however, a solution that satisfies the need for organizing the unloading of material assets, taking into account all the features, has not yet been found. The article proposes the author’s conceptual approach to improving the process of unloading material resources on an unequipped coast, which consists in using a completely new transport and technological system for preparing unloading areas, affecting all the constituent elements of the process: vehicles, transmission links and coast.
A methodological approach formation to assessing the compliance degree with the requirements and the achieving it cost at the product life cycle stages
Authors: Kirov A V 
Published: February 2021

Abstract
Currently, industrial enterprises and operating organizations is in the development process and the products’ system life-cycle management formation. In this system, the compliance assessment and cost analysis on product quality are the main objectives. Under ISO 9000 series standards, product cost assessment is one of the enterprise quality management system basic elements. To do this, product quality costs must be set, processed and analysed in the same way as other costs. At the moment, there are different approaches to determining the quality products cost that is not effective enough. The presented work has developed a methodical approach that can be applied in assessing the products’ life cycle total cost and determining the “price-quality” effectiveness type.
Aircraft life cycle management system architecture for solving cost management tasks
Authors: Gyazova M M , Gorelov B A 
Published: February 2021

Abstract
The article is devoted to cost management issue in the aircraft life cycle management system. In a theoretical analysis, the authos consider the main cost management components, the main automated systems used in the modern integrated information space and the universal scheme of using automated systems at product life cycle different stages for effective cost management problems solving. The research part of the article is based on production cost management scheme development, as well as the aircraft life cycle management system architecture formation, which allows solving cost management tasks, including during aircraft operation phase.
The induction heating process modelling of the waveguide paths’ flanges
Authors: Milov A V , Tynchenko V S , Kurashkin S O , Petrenko V E , Rogova D V , Tynchenko Ya A 
Published: February 2021

Abstract
The article presents mathematical heating model the flange is in process induction soldering of waveguides paths. In the quality of object of research stands out creation process all-in-one connections based on induction heating, or more precisely, patterns distributions energy over time by default flange size waveguide the route. Goal creating a model consists of in the upgrade process quality of management technological equipment process production facilities antenna-feeder devices based on the induction soldering technology. Developed by models can be used for adaptive management technological equipment process induction system soldering when production waveguide paths assemblies.
Similarities of the total electron content behavior during geomagnetic storms
Authors: Maltseva O , Nikitenko T 
Published: February 2021

Abstract
The study of the behavior of the ionosphere during disturbances is traditionally an important task. One of the authors in the GA 2018 paper found two groups of similar magnetic storms in 2013 and discovered a similarity in the behavior of the critical frequencies foF2 according to the data from the Sodanküla high-latitude station in the northern hemisphere, but this similarity was reduced to a negative disturbance, which is also characteristic of a large number of dissimilar magnetic storms. Nevertheless, it seemed interesting whether such a similarity could be inherent in the behavior of the total electron content TEC of the ionosphere. The study was carried out using data from three stations Juliusruh, Tromso, Longyearbyen near the 15° N meridian. It turned out that this similarity is observed in the behavior of foF2 and TEC, which is confirmed by high correlation coefficients between these parameters both during months and periods of disturbances.
Method for constructing a network of urban roads using satellite images
Authors: Vikhtenko E M , Tusikova A A 
Published: February 2021

Abstract
An automatic method for recognizing the urban network of highways on high-resolution satellite images has been developed and implemented, based on the use of the Mask-RCNN convolutional neural network. The results of the neural network operation are post-processed by the Hough transformation and algorithms of mathematical morphology. The proposed method has acceptable accuracy and high speed of detection of asphalt urban roads.
Finite-differential models used as a basis for IT support in problem-solving
Authors: Zatonskiy A , Sirotina N , Bazhenov R , Altukhova I , Alutina E 
Published: February 2021

Abstract
The study confirms that the forecast quality of social-economic indicators estimated with multiple linear models does not often seem to be satisfactory. The coefficients of regression-differential models are poorly interpreted economically. This paper covers the issue of improving the forecast quality by modifying regression-differential models to the sum of linear and autoregressive models. For brevity, the resulting models are called finite-differential models of the first-and second-orders, respectively. The authors use the coefficients of multiple linear models for an initial estimate when they determine the unknown coefficients of finite-differential models. The performance of the suggested method is tested with 60 sets of statistical data. The study proves that the use of the first-order finite-differential model results in the significant increase in the quality of forecasting and reduction of the approximation error for 65 per cent of cases, and there are 80 per cent of cases when a second-order finite-differential model is used. This indicates that the authors suggest a valid modification of the algorithm for determining the coefficients of models so that it can be used in further research
Belt conveyors: principles of building control and diagnostics systems
Authors: Dzhundibayev V E , Kochetkov A V , Bobeev A B 
Published: February 2021

Abstract
Diagnostics allows you to get information about the technical condition of the main components of the belt conveyor, the results of which the control system adapts to changing conditions. Diagnostics is carried out by technical means of diagnostics and assessment of transport and operational condition. The main provisions of the conceptual plan and functional properties of advanced diagnostic systems are developed. The requirements for software and hardware and data bank for diagnostics of the state of belt conveyors are defined.
Effect of ferromagnetic shunt manual armature return polarized electromagnet on electromagnet power performance
Authors: Zaitsev N Yu , Ivanova S P , Nikolaev N N , Petrov V N , Svintsov G P 
Published: February 2021

Abstract
Using the FEMM program, models of a neutral electromagnet, a polarized electromagnet without a shunt and a polarized electromagnet with a shunt for manual armature return to the initial position have been developed to study a shunt effect on an electromagnet power characteristics. It has been established that the polarized electromagnet anchor attraction electromagnetic force without a shunt at a critical (initial) working gap is 1.44 times greater than that of a neutral electromagnet. A polarized electromagnet with a shunt armature attraction electromagnetic force with an initial gap is 1.1 times less than that of a polarized electromagnet without a shunt. The shunt initial and final positions influence investigations on the armature attraction electromagnetic force magnitude have been carried out. It is shown that in the armature final position and the shunt initial position, the armature attraction force from the permanent magnet is sufficient to keep the contactor contacts closed. When the shunt is moved to the end position, the force from the permanent magnet is not enough to hold the armature in the pulled position and the condition is provided for opening the contactor contacts. Studies have confirmed that a ferromagnetic shunt, designed to manually return a polarized electromagnet armature to its initial position, the contactor in normal operation leads to a decrease in the drive electromagnet magnetomotive force.
Parameterized FEM for estimation of product unit assembly parameters
Authors: Grachev I A , Kudashov E V , Bolotov M A , Pronichev N D 
Published: February 2021

Abstract
The article analyzes the existing calculation methods for assembly dimensional chains. The analysis revealed factors that are not considered in the methodology as a result, thus reducing reliability of the calculations. One of such factors is link interconnection for some dimensional chains, which must be considered while calculating. The parametrized finite-element model (FEM) of an aviation engine rotor is proposed considering: link interconnection of dimensional chains; geometrical deviations of part surfaces; axial forces from bolt connection; volume deformations. The developed FEM has been used in theoretical and experimental studies of geometric accuracy of the rotor assembly parameters. The research results for interrelationship of end face and radial run-out values of controlled rotor surfaces from geometrical errors of its parts are presented.
Analytic design methodology for flexible wing parametrization and spanwise load estimation
Authors: Gueraiche D , Popov S , Benini E 
Published: February 2021

Abstract
Presented is an analytic study of aerodynamic loading along a high aspect ratio wing, typical for airliners, under passive aeroelastic deformation. Such a highly non-planar, curved wing is feasible using the latest composite material technology, and is expected to enhance airliners aerodynamic performance at transonic cruise conditions, given it allows lower induced drag, similar to a wingletted wing. Also, gust and manoeuvring loads can be partially alleviated by the structure elasticity, hence the concept is of great interest for the airliner industry. A major problem to designing highly flexible wings is their constantly shifting shape and, as a result, their hardly predictable, non-constant lift force generated. This paper provides an attempt to precisely estimate load distribution along the statically inflected wing at different stages of its deformation, using mathematical parametrization of the curved wing shape to relate its geometry to aerodynamic loading and structural stiffness in a closed form function. This is achieved using the geometric dependency of local angles of attack on local wing curvatures, therefore load distribution is a function of the parametrized deformed wing shape. Spanwise load distributions in turn can be coupled with structural stiffness distributions using cantilever beam theory.
Interaction and orientation of non-magnetic particles in magnetic fluid in magnetic and electric fields
Authors: Vegera Zh 
Published: February 2021

Abstract
In this article, the processes of structuring non-magnetic microparticles of various shapes (spherical and cylindrical) placed in magnetic liquid are investigated. It was established that the equilibrium orientation of non-magnetic microparticles and structural formations from them in magnetic and electric fields is determined by the ratio of both field strengths and magnetic and electrical parameters of the carrier medium and material of non-magnetic inclusions. Analysis of mechanisms of interaction of non-magnetic filler particles and orientation of formed structures under the influence of magnetic and electric fields was carried out. It has been found that the action of a uniform magnetic field on a magnetic liquid with a dispersed non-magnetic filler leads to a significant anisotropy of the thermal conductivity coefficient - the difference in the thermal conductivity coefficient in the direction coinciding with the field strength vector and perpendicular to it can reach 25%. The analysis of the detected effect is made on the basis of ideas about the occurrence of structural anisotropy in such a medium due to the structural organization of non-magnetic filler particles in the magnetic field.
Optimization of identification of non-stationary objects due to information properties and features of models
Authors: Jumanov I I , Xolmonov S M 
Published: February 2021

Abstract
Constructive approaches, principles, methods of optimal identification of random time series of non-stationary objects with mechanisms of using statistical parameters, dynamic characteristics, specific features, and data patterns are proposed. Models and algorithms for hybrid identification have been developed that combine the capabilities of statistical, dynamic models, and a three-layer neural network. Mechanisms for adjusting model variables are implemented, taking into account the structural complexity, stochasticity of links between the elements of the random time series, ambiguity of dynamics, a large number of variables, the impact of the external environment. In the solutions of optimization problems, probabilistic and soft computing, self-organizing, predictive, adaptive properties of neural networks and dynamic modeling are used. A generalized algorithm for the identification of non-stationary objects is built on the basis of the mechanisms for identifying segments, boundaries, the general interval of element values, the selection of informative elements, and the formation of a training set. A simplified computational scheme for identifying non-stationary objects is implemented on the basis of 4-order orthogonal polynomials, a cubic extrapolation spline function, a linear Kalman filter, and a three-layer neural network. A software complex for identification in the C ++ language in the parallel computing environment “CUDA” has been developed and implemented.
Aerospace engineering experience and on-board software projects of satellite navigation systems
Authors: Kovalev I V , Testoyedov N A , Koltashev A A , Efa S G 
Published: February 2021

Abstract
The main stages of creating global space navigation systems of the first generation are discussed in the article. The authors give a description of the scope and content of work, stages and timing of this work, and also give the main characteristics of the satellites and on-board software testing processes of these space navigation systems. The list and sequence of technological stages of the on-board software testing process are defined in the description of the methodology for guaranteeing the quality of development and maintenance of the on-board software of communication and navigation satellites.
Measurement information security when using mechanoluminescent sensor elements with distributed sensitivity in aerospace engineering
Authors: Tatmyshevskiy K V , Pavlov D D 
Published: February 2021

Abstract
Electromagnetic compatibility and protection of data transmission lines is currently one of the most important requirements for elements of modern technical devices. Especially should be considered the possibility of electromagnetic compatibility when introducing new sensors into operating technical systems. Fiber optic sensors, operating in generator mode and producing signals of an optical nature, are not susceptible to electromagnetic interference and do not emit interference into the surrounding space. Distributed mechanoluminescent pulse pressure transmitters belong to this type of sensors. One of the most important elements of this type of sensors is the transmission channel of the output optical signal. The analysis of the possibility of using fiber-optic harnesses for the transmission of measuring information is carried out.
Comparative study of local search in SWAP and agglomerative neighbourhoods for the continuous p-median problem
Authors: Kazakovtsev L A , Rozhnov I P 
Published: February 2021

Abstract
One of the classical NP-hard problems of location theory is the p-median problem. In this paper, we investigate the comparative efficiency of searching for a solution to this problem in SWAP-neighborhoods, as well as in new AGGL-neighborhoods, the concept of which is introduced in this paper. A higher comparative efficiency in AGGL-neighborhoods is shown, as well as the dependence of the search result on the neighborhood parameter, the selection of the optimal values of which requires additional research.
Information security aspects of virtual museums in Russia
Authors: Mityushin D A 
Published: February 2021

Abstract
Information technologies are entering the life of modern society by leaps and bounds, sometimes radically changing its image. The influence of information technologies on changing the cultural and spiritual space of many countries is perceptible too. A new phenomenon of modern culture has gone into society – the virtual museum, which has faced completely new problems that real museums have not experienced before. These problems are associated with ensuring the cyber security of virtual museums. The article discusses the features of virtual museums, their advantages and disadvantages compared with real ones. Special attention is given to the information security of virtual museums. The author has found a large number of research and publications deals with virtual museums. However, they practically do not touch on issues related to the cyber security of the object under study. Threats of virtual museums and attacks against ones are analyzed in the article. Security variants against threats are offered.
Building communication networks: on the application of the Kruskal’s algorithm in the problems of large dimensions
Authors: Melnikov B F , Terentyeva Y Y 
Published: February 2021

Abstract
The paper deals with the development of the topology of ultra-large communication networks, i.e. networks containing several thousand vertices. In this case, the coordinates of the vertices of the undirected graph are somehow predetermined and a set of edges must be constructed. The main point of the options we are considering for developing the network topology is the minimum of the sum of weights of the edges; however, we note in advance that this criterion of minimality is often not the only objective function in the practical problems we are considering. In our previous papers, two realistically considered tasks were formulated. However, everything is not so simple, and we cannot use the direct version of Kruskal’s algorithm. The complexity of this algorithm depends on the representation of the data, i.e. the data structures used. In our situation (when the number of considered vertices is approximately 5000 to 10000), the operation of a simple version of the algorithm takes about a half an hour, which, of course, is acceptable for a one-time solution to the problem under consideration, but it is unacceptable in the case when such solutions are constructed repeatedly (in particular, iteratively). Some temporary improvements to the practical operation of the algorithm provide different options for using complex data structures. The subject of this article can be formulated as follows. We are moving from exact algorithms (in particular, Kruskal’s algorithm) to some heuristics. Moreover, for the starting problem that we are considering, we cannot work without heuristic algorithm at all. However, we describe two specific variants of a simple implementation of Kruskal’s algorithm for problems of large dimensions; in our titles, those are “the 1st and the 2nd algorithms of the usual implementation”. We have formulated two heuristics (“the 3rd and 4th algorithms”). In our opinion, one of these algorithms turned out to be quite acceptable; we present some practical results of computational experiments. And it is very important that these two heuristics will be useful not only for such a “0-th problem”, but also for much more complex problems.