bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Measures to Reduce the Energy Facilities Impact on the Environment on the Example of the Crimean Energy System
Authors: Opalev D P , Bekirov E A , Asanov M M 
Published: November 2021

Abstract
The world community is seriously concerned about the harmful effects of human activity on the environment. Reducing this influence is on the agenda for most countries. Energy facilities play the greatest role in environmental pollution with harmful emissions. Reducing the generated electricity will positively contribute to an improvement of the environmental situation. This can be achieved by decreasing electric energy losses during its transmission. The paper considers losses at various stages of electric energy transmission, presents the components of actual losses, as well as measures to reduce them. The effectiveness of two methods is analyzed on the example of the Crimean energy system: the method of interrupting the low voltage network and the method of disconnecting part of the transformers in the low loads mode. Conclusions about the need for operational regulation of the considered energy system in order to reduce electric energy losses are made.
The Object According State Prediction to Diagnostic Data
Authors: Baranov L A , Balakina E P , Godyaev A I 
Published: November 2021

Abstract
The predicting methodology the state of the object based on diagnostic data is considered. With the selected parameter that determines the state of the object, it is measured in real time at a fixed sampling step. According to the measurement data, the value of this parameter is predicted in the future. This operation is implemented by an extrapolator of the l order - a l degree polynomial, built using the least squares method based on the previous measurements results. The changing process model of the diagnosed parameter is a random time function described by the stationary centered random component sum and a mathematical expectation deterministic change. The estimating prediction error method and the extrapolator parameters influence on its value are presented.
Reliability of Certain Class of Transportation Networks
Authors: Baranov L A , Godyaev A I , Ermolin Y A , Shubinsky I B 
Published: November 2021

Abstract
The reliabilityof a special class of technical objects - tree-like transportation networks is considered. It is argued that the indicators traditionally used to assess reliability in relation to such objects are not very informative and are ambiguously interpreted from a physical point of view. As a quantitative measure, an indicator of operational reliability is proposed and an engineering method for its calculation has been developed. It uses the features of the object, is based on an analogue of the Y-shaped structure-forming fragment of the network and is reduced to a repeating step-by-step computational procedure, when at each step the results of the calculation are obtained at the previous stage and used as initial data. Relationships are derived that allow extending this approach to the case when at the junction point of network elements not two, but, in general, n elements are combined. The advantages of the introduced indicator of the operational reliability of tree-like transportation networks are discussed and the ways of its further generalization and use are outlined
Image Analysis to Optimize Calculations of Grinding Modes
Authors: Zmyzgova T R , Agapova N V , Polyakova E N , Chelovechkova A V 
Published: November 2021

Abstract
Modeling helps to investigate and analyze the interrelationships of grinding parameters as a single system. The article describes a computer model of the surface layer of a grinding wheel, taking into account the cutting modes and characteristics of the circle. The subsystem of the surface layer of the grinding wheel is the most important subsystem of grinding, since it connects the main characteristics of the circle with the cutting modes and with the parameters of the workpiece. The output characteristics of the model are the parameters of the working layer with a height of several micrometers, in which micro-cutting occurs. It is impossible (or very difficult) to obtain them by conducting full-scale experiments, since the processes are instantaneous, and the cutting elements have micro-dimensions. This problem was solved by creating a simulation stochastic model based on the geometric representation of the surface layer, which clearly displays the result. The analysis of the image of this model allowed us to numerically describe the output parameters of cutting.
The article offers a faster algorithm for analyzing the image of the simulation model of the surface layer. It is carried out over a matrix containing numerical information about the projection of the surface layer, the main parameters of each single slice are calculated, and only after that the result is displayed on the graphic screen. To simulate a single grinding mode, it is necessary to repeat the process of "image creation - image analysis– output of results" hundreds of times until a stable state is reached.
The use of the algorithm in an automated system will allow you to create a system for automatically searching for optimal grinding modes, as well as to derive analytical dependencies of cutting modes on input parameters, for example, on the parameters of the circle and the workpiece.
Small Object Signal Formation Model for Optical System with Matrix Photodetector When Processed by the Laplace Operator
Authors: Rogachev V , Mikhailov A , Kamenev A 
Published: November 2021

Abstract
The authors review the formation of a small object signal by an optical system with a matrix photodetector. They develop a mathematical model of signal formation and test it. The authors calculate the signal/noise proportion for various small object signal shapes and amplitudes processed by the Laplace operator.
Analysis of the Causes of Emergency Shutdowns on Electric Networks
Authors: Polkovskaya M N , Yakupova M A 
Published: November 2021

Abstract
The paper analyses the causes of emergency outages on electric networks according to the data of the Pravoberezhny district of Irkutsk for 2008-2017, according to which 82% of failures of elements of the electric network are caused by breakdowns and equipment failure; 9% are due to the influence of external factors; 5% occurred due to natural and climatic reasons, 4% – due to other circumstances. The largest number of outages due to operational reasons occurs due to damage to cable and overhead lines. Accidents caused by the influence of external factors are mainly associated with the negative impact of people, animals and birds. Equipment failures related to natural and climatic factors are mainly due to wind or thunderstorms. Other circumstances, as a rule, include staff errors and unidentified reasons. Calculations of undersupply of electricity and economic losses caused by interruptions in power supply were made. It should be noted that in order to reduce the number of equipment failures, it is necessary to carry out timely maintenance and reconstruction of various elements of electrical networks.
Experimental Study of Energy Conversion of Daily Temperature Difference
Authors: Chelukhin V , Vasiliev A , Aung Pyae Zone 
Published: November 2021

Abstract
Recently, more and more attention is paid to renewable energy. Recently, green energy or renewable energy is increasingly beginning to squeeze traditional energy based on the combustion of fossil fuels: coal, oil, and so on. Basically, the development of renewable energy sources comes from wind energy and solar energy. However, as recent situations in Germany, the United States and others have shown, wind energy has its drawbacks.
This is, first of all, the instability of the power supply, as well as the difficulty of converting variable wind energy into direct alternating current for industrial use.
Solar energy also has its drawbacks. This is the need for large areas, the need for just such sunny areas and the cleaning of solar panels from snow, dust and other precipitation.
Today, there is a search for renewable energy sources in all directions, the most insignificant options are being considered, such as, for example, at the junction of fresh water, salt water, some kind of energy is released.
The paper considers a method of obtaining energy using the temperature difference between day and night. At any point in the world, the temperature is always higher during the day, and always lower at night. This so-called temperature drop can be from 3 to 12.15 and more degrees, for example, in Urengoy in winter it can reach 60 degrees. It’s the same on the planets: on the moon, especially on Mars. There, the temperature difference between day and night is about 60-80 degrees, since Mars has no atmosphere.
Neural Forecasting System of Regional Cooperative Systems Innovative Activity Results
Authors: Kirillova E , Lazarev A 
Published: November 2021

Abstract
The analysis of changes in the external and internal environment of organisations, requirements for ensuring long-term sustainability and competitiveness in modern conditions suggests the need to develop instrumental support for decision-making support processes in the implementation of innovative projects of cooperative formations. Significant expenditures of financial and time resources allow to determine the priority problem – the insufficient development of systems for reducing uncertainty in interaction with the processes of scientific and industrial cooperation, which determine the disproportions of the resulting economic indicators of the functioning of innovative activity in the region. The proposed solution is an implemented multiplatform software for neuro-cluster analysis of multiformat data, which is based on fuzzy data prediction algorithms based on a nonlinear autoregressive exogenous model. An important feature of the implemented software is an algorithm for optimising the processing of predicted data, based on distributed processing of big data using Microsoft Server operating system.
Numerical Investigation of Unsteady Flow Dynamics in a Packed Bed
Authors: Pashchenko D I , Shchelokov A I , Satonin A V , Makarov I V 
Published: November 2021

AbstractNumerical simulation of unsteady flow of a compressible fluid in a fixed bed filled with porous elements has been performed. The research was carried out via ANSYS Fluent software. The scientific substantiation and verification of the physical and mathematical approaches incorporated in ANSYS Fluent for the problem of unsteady flow in a fixed bed has been carried out. For the computational domain, the interfaces of the flow area and the surface of porous particles are coupled by combining the contacts into a component part. The numerical results were verified using experimental data. The study was carried out in the range of velocity from 0.25 to 3.25 m/s. An expression is proposed for determining the pressure drop in a fixed bed, in which the pressure drop depends on the velocity, flow properties and the linear coefficient of local resistance. The values of the linear coefficient of local resistance are determined for the most common nozzle shapes in the industry: cylinder, Raschig ring, convex cylinder with 7 holes, sphere with 7 holes. It was found that with an increase in velocity, the value of the linear coefficient of local resistance decreases.
Systemization of Indicators for Assessing the Impact of Power Engineering Facilities on the Environment of the Arctic Zone in Yakutia
Authors: Nikolaeva N A 
Published: November 2021

Abstract
The development of mineral resources in the Arctic zone of Yakutia is followed by a progressively increasing impact on the environment. Under these conditions, it is necessary to develop such directions for reducing the negative consequences of industrial development that could support the entire ecosystem of the North in a balanced state in strict accordance with the laws of structure, processes and changes in the landscape structure. This can provide a complex geoecological approach that involves a systematic study of the relationships between both natural and man-made objects. In general, this approach is based on the study of the impact processes of athropogenic activities on the environment, changes in the environment and consequences that affect natural and social conditions. Under conditions of extremely low resistance of natural landscapes to any impacts, it is necessary to assess and search for directions reducing the consequences of industrial development. In this regard, a schematic model of indicators systematization of environmental and socio-economic consequences of the functioning of energy supply facilities is developed on the example of the Yana, Indigirka and Kolyma river basins in accordance with the laws of structure, processes and changes in the landscape structure.
Modeling a Microgravity System for Ground Testing of Transformable Space Structures
Authors: Ezangina T , Gayvoronsiy S A , Sobol S 
Published: November 2021

Abstract
The article develops a mathematical model of a microgravity system that simulates the conditions of weightlessness during ground tests of spacecraft. The microgravity system consists of vertical and horizontal control channels, providing a link opening in a twodimensional coordinate system. The channels are two-mass electromechanical systems with elastic connections. To simulate the microgravity system, mathematical models of these channels are obtained. To check the adequacy of the obtained models in Simulink Matlab, we simulated the opening of a link of a mechanical system. As a result of modeling, the permissible indicators of the accuracy of simulating weightlessness were obtained.
The Method for Estimating the Maximum Velocity of the AUV Motion with Trajectories Re-Planning According to their Dynamic Properties
Authors: Yukhimets D A , Karmanova S V 
Published: November 2021

Abstract
The paper considers the problem of adjusting the value of a predetermined velocity required for horizontal motion of autonomous underwater vehicles (AUVs) in an environment containing obstacles, when trajectories change in order to avoid obstacles. Therewith, the velocity estimation generated during the re-planning of the AUVs motion trajectories is the maximum possible and is carried out on the basis of the AUVs dynamics model, considering their dynamic limitations and changes in the parameters of the motion trajectories. The topicality of the task is determined by the need to improve the efficiency of underwater missions in various areas of human activity (environmental monitoring, laying and maintenance of underwater communications, etc.). It depends on the mode of the AUVs motion: their velocity and parameters of the trajectories. The simulation results confirm the efficiency of the proposed method for estimating the maximum possible velocity of the AUVs motion.
The Mathematical Models of Lattice Functions in Modelling of Control System
Authors: Kramar V 
Published: November 2021

Abstract
The paper proposes an approach to constructing a mathematical model of lattice functions, which are mainly used in the study of discrete control systems in the time and domain of the Laplace transform. The proposed approach is based on the assumption of the physical absence of an impulse element. An alternative to the classical approach to the description of discrete data acquisition - the process of quantization in time, is considered. As a result, models of the lattice function in the time domain and the domain of the discrete Laplace transform are obtained. Based on the obtained mathematical models of lattice functions, a mathematical model of the time quantization element of the system is obtained. This will allow in the future to proceed to the construction of mathematical models of various discrete control systems, incl. expanding the proposed approaches to the construction of mathematical models of multi-cycle continuous-discrete automatic control systems
The Study of the Effectiveness of Strengthening the Traction Power Supply System of the Northern Route of the Eastern Polygon of the Russian Railroads
Authors: Puzina E Yu , Khudonogov I A 
Published: November 2021

Abstract
The train-handling capacity of the limiting section of the traction power supply system of the Northern route of the Eastern polygon of the Eastern Siberian Railroad has been estimated, taking into account the prospective amount of traffic for 2025. Due to insufficient train-handling capacity of the section and inconsistency of voltage level in the overhead system, the parameters of traction power supply system operation mode were studied using the mathematical simulation method in the Fazonord software application and the mathematical simulation method in the Kortes software application using various technical means of amplification.
The simulation results allowed us to determine the most optimal amplification methods that meet the task set.
It was proved that the method of increasing the transmitted power from 220 kV power line to 110 kV line through the autotransformer installed for their connection at the new traction substation of the limiting long section corresponds to the purpose of ensuring the required trainhandling capacity of the limiting section in the best possible way, taking into account the prospects for development of both the external power supply system and the system of traction power supply. At one of the traction substations of the section under study it is required to install an additional power transformer for parallel operation.
The specified combination of technical amplification means brings the parameters of traction power supply system into compliance with the requirements.
On the Condition of Covering Completeness in Associative Steganography
Authors: Raikhlin V A , Vershinin I S , Gibadullin R F 
Published: November 2021

Abstract
Previously, the completeness of the coverage was considered by the authors as an interpretation of a kind of logical interpretation of the criterion of perfect secrecy by K. Shannon – one of the necessary conditions that the concept of associative steganography should satisfy. The article shows that in reality, the completeness of coverage is a completely independent condition for ensuring the required level of data protection when analyzing scenes. It should not be associated with the criterion of K. Shannon.
Fractal Characterization of Heat and Mass Transfer Processes in Nanostructured Materials
Authors: Kovalenko A N , Zarichnyak Yu P , Ivanov V A , Bolshev K N 
Published: November 2021

AbstractThe relationship between the fractal self-organization of structural-phase inhomogeneity in nanostructured materials and the processes of heat and mass transfer in them is considered. It is characterized by a non-Euclidean relationship between the rate of increase in the number of the considered elements of the medium and an increase in the scale of their consideration and is described by the transfer equations in fractional derivatives with respect to coordinate and time.
Hyperspectral Data Clustering Using Hellinger Divergence
Authors: Myasnikov E 
Published: November 2021

AbstractClustering is an important task in hyperspectral image processing. Despite the existence of a large number of clustering algorithms, little attention has been paid to the use of non-Euclidean dissimilarity measures in the clustering of hyperspectral data. This paper proposes a clustering technique based on the Hellinger divergence as a dissimilarity measure. The proposed technique uses Lloyd’s ideas of the k-means algorithm and gradient descent-based procedure to update clusters centroids. The proposed technique is compared with an alternative fast k-medoid algorithm implemented using the same metric from the viewpoint of clustering error and runtime. Experiments carried out using an open hyperspectral scene have shown the advantages of the proposed technique.
Development of Software for the Implementation of an Adaptive Approach to the Generation of Internal Filling of a 3D Model in Additive Manufacturing
Authors: Kholodilov A A , Faleeva E V , Kholodilova M V 
Published: November 2021

Abstract
The article describes the technology of software development for the implementation of an adaptive approach to generating the external and internal structure of a 3D model in preparation for 3D printing when transferring from *.stl format to * g.code format. The main stages of software design, the principles of mathematical modeling underlying the development are considered, the practical significance of the developed software complex-slicer is shown with a description of the functionality and conceptual development.
Investigation of the Mathematical and Software Implementation of Triangulation Mesh Generation Algorithms in Relation to the Creation of a Slicer Program
Authors: Kholodilov A A , Faleeva E V , Kholodilova M V 
Published: November 2021

Abstract
The article discusses an algorithmic method for increasing the strength characteristics of products produced by additive manufacturing technologies through thickening the internal grid structure of filling the model when transferring to the control code during the operation of the slicer program. It shows the internal filling using the Voronoi grid and the "Exhaustion Algorithm" for the implementation of the internal filling of the threedimensional model in the process of the slicer program.
Application of Optimal Kalman Filter to Improve the Accuracy of Aircraft Wing Vibration Parameters Measurement System
Authors: Afonin A A , Sulakov A S , Maamo M S 
Published: November 2021

Abstract
This paper discusses the advantages of constructing a vibration parameters measurement system of an aircraft wing using mems IMUs. In addition to mems IMUs, the system makes use of displacement sensor and navigation system as secondary measurements, along with the optimal Kalman filter estimation. The basic principles of system operation are described. The main algorithms of the system and its errors mathematical model are presented. The results of simulation are presented, demonstrating the expected measurement accuracy of the system as a whole.
Improving Reliability of Smart Transport Systems
Authors: Goloskokov K , Korotkov V , Marley V , Knysh T 
Published: November 2021

Abstract
The purpose of this article is to demonstrate the key improvement methods for smart transport system reliability and quality. The authors claim that the improvement of reliability and quality of information systems including smart transport systems is linked to the problem of improving the redundancy and structural complexity of systems. They suggest using the incomplete functional redundancy method to improve the reliability and quality of operation for multifunctional smart transport systems. This method is deemed promising because it facilitates the efficient use of the technical means of smart transport systems.