bluuebunny/crossref_metadata_2025_split huggingface dataset:
The mechanisms of initiative projects stimulating
Authors: Barkalov S A , Burkov V N , Chodunov A M , Daulbaeva Z M , Akinina Ju S 
Published: November 2020

Abstract
The mechanisms of stimulating initiative projects are considered. In terms of content, these can be mechanisms for stimulating social projects, volunteer movements, etc. Each project has an assessment of value obtained by an expert. To stimulate projects allocated a certain fund. This fund is distributed in proportion to the values of the projects implemented. Each project performer has an estimate of minimum remuneration, depending on the value of the projects. Various models of project performers’ behavior are investigated. In the first model, the performer performs all projects total remuneration for which is not less than the minimum value. In the second model, the performer minimizes the difference between the received remuneration and its minimum value.
Advanced nonlinear statistics reveals the relations between anthropometry and bioimpedance of physique in post-surgery complications of the patients with gastric cancer
Authors: Gorbunova E A , Medvedeva N N , Zukov R A , Sadovsky M G 
Published: November 2020

Abstract
Smart analysis of multidimensional data of the physical development of patients with gastric cancer is carried out through the implementation of non-linear up-to-date technique of statistical analysis that is elastic map method. It is shown the data on physique reveal the dynamics of the disease, and support a prognosis for the outcome.
Analysis and preliminary classification of social network communities by the degree of attitude to the conflict
Authors: Chengar O V , Shevchenko V I , Maschenko E N , Obolensky D M , Soina A S 
Published: November 2020

Abstract
This article is based on the researches, those aim is to solve an interdisciplinary fundamental scientific problem – the study of big data analysis technologies for developing scenarios of communication mechanisms formation for working with Internet communities in order to reintegrate a post-conflict society, for example, Ukraine. The strategy is based on the method of classification of VK user communities relying on keywords.
On calculation and assessment of machine reliability
Authors: Kokieva G E , Voinash S A , Maksimovich K Y , Sokolova V A , Ivanov A A , Panov A Y 
Published: November 2020

Abstract
Problems of durability and reliability of machines are of interest not only to scientific constructors and mechanical engineers but also to consumers who operate machines, organize their maintenance and repair. Durability is associated with machine downtime caused by need to determine its performance. Since at the same ones, relatively simple tuning and adjustment operations were performed, and in another, complex installation work is required with replacement of road, parts, and assemblies. Qualitatively, reliability is defined as a property of a mechanical system (machine) to execute, without fail for a specified time, amount of established work, subject to rules of operation. Machines failures are divided into two groups: apparent - accompanying breakdowns of parts, rupture of kinematic chains, destruction of joints; implicit - manifested in deviation of dimensions or parameters that determine quality of work of parts from established or permissible values. The article describes research methodology, which is carried out by quantitative characteristics of reliability of elements. Quantitatively, reliability is determined by probability of completing a task in a timely manner with appropriate quality of work. Then failure rate is determined which shows what proportion of parts from their total number fails during the period under review. Analysis ofequipment failures during periodic tests showed that significant number of them are caused by imperfection and imbalance of established design rules and standards. Thus, it can be noted that reliability is an important indicator, but not sufficient for a full characteristic. The machine must be evaluated for maintainability and durability.
Research of high-speed high-performance and small-sized screw conveyors-grain loaders
Authors: Kokieva G E , Voinash S A , Khamarova S V , Kalimullin M N , Sokolova V A , Alekseeva E A , Kebko V D 
Published: November 2020

Abstract
Currently, agricultural enterprises are offered many conveyors of various typesfor the mechanization of loading and unloading works during cropmovement. The article presents studies of a method of increasing performance of a screw type conveyor allowing to create a small-sized design by increasing its revolutions. It investigates workmechanism, describesoperational technology of conveyors-grain and work disadvantages, namely, problematicgrain transportation over long distances along a spatial route or complication of technological scheme. Loading directly from pile may require manual labor or additional equipment. It is noted that increase in performance with increase in rotor revolutions (from 400 to 1100 rpm) occurs up to a point, after which revolutions increase, and performance decreases. In order to increase screw performance, it is necessary to accelerate material axial advance, i.e. to stretch ascending and, especially, falling material trajectorybranches at high speeds, with bulky material (grain), cast by centrifugal force to inner pipe surface, filling the grooves. Since their locationis close to each other (at 30°), surface braking layer is formed, which decreases circumferential speed component of absolute movement of grain andincreases the axial one. In order to increase screw performance, it is necessary to accelerate material axial advance, i.e. stretch ascending and, especially, falling material trajectorybranches. Further studies will contribute to finding new ways to increase speed coefficient K
υ
and coefficient ψ and create high-speed, high-performance, and small-sized screw conveyors-grain loaders.
Impact assessment of cutting velocity on specific energy consumption of ice fracture process with sharp disc
Authors: Ganzha V A , Voskresensky G G , Kaizer Yu F , Lunev A S , Ganzha A V , Satyshev A S , Karelin E N , Chavyraa Ch D 
Published: November 2020

AbstractThe article discusses the possibility of increasing the efficiency of the working attachments of road machines and their adaptation to work in various conditions, due to the group equipping with single saw blades placed according to specially developed schemes. The main results of studies of the processes of interaction of a saw blade moving in space with a variable speed with ice during its mechanical destruction are presented. The conditions for conducting experimental studies, the composition and general structure of the main and auxiliary laboratory equipment used are described. The main results of laboratory research are stated. Taking these results into account, the specific energy intensity of the process under study was calculated, the graphs of the dependence of the specified parameter on the cutting speed were plotted, and conclusions were formulated on the work. The substantiation of rational operating parameters of saw blades is given, which ensure the minimum specific energy consumption of the process under study.
Mathematical model of motion of a controlled vehicle on a plan moving in a medium with a quadratic resistance
Authors: Generalova Aleksandra A , Kireev Sergey Yu , Bychkov Dmitriy S , Nikulin Artem A , Generalov Konstantin A 
Published: November 2020

Abstract
This article offers a mathematical model for describing vehicle control, which allows you to determine the areas of possible positions of the vehicle in space on a flat surface for different moments of time. These areas are called reachability sets and play an important role in solving problems of controlling, observing, and predicting the movement of a controlled vehicle. The mathematical model allows you to evaluate the manoeuvrability of the car, choose the optimal control program, form the optimal control when pointing the vehicle, evaluate the spread of trajectories under the influence of disturbances, and improve the accuracy of estimating the parameters of the car’s movement. The main assumptions of the mathematical model are that the vehicle is affected by the resistance of the medium (air) proportional to the square of the speed of movement, there is no wheel slip, and the speed does not change instantly. The main parameters that characterize the movement are acceleration, angular velocity of rotation of the body around the centre of mass, the coefficient of resistance of the medium, the initial speed and the speed of the centre of mass of the controlled vehicle.
Numerical evaluation of the quality of filling the engine cylinder with a fresh charge
Authors: Zholobov L A , Medvedev A V , Pasin A V , Novozhilov A I 
Published: November 2020

AbstractThe article presents the results of mathematical and numerical modeling of engine filling taking into account gas-dynamic factors. When evaluating engine filling, it is necessary to evaluate the boundary conditions at the time of opening the intake valve and the effective passage area in the channel neck, which, together with the valve lift, is the determining size in the gas distribution mechanism. The numerical values are a function of the ratio of the current valve displacement to the neck diameter. The filling losses associated with the heating of the air charge from the walls and the partial conversion of the kinetic charge into heat are estimated by the losses ΔT. This value of the temperature increase when filling the internal combustion engine is made for the mode of the spring speed characteristic. Changes in the charge pressure at the end of the inlet are estimated by the loss of part of the kinetic energy with the transition to potential energy due to charge deceleration. The paper evaluates the gas injection from the cylinder into the intake system at partial loads due to an increase in the valve overlap zone. Which ultimately reduces the filling factor. Data are given on the increase in the filling coefficient due to the pre-charging process due to the expansion of the delay phase of the intake valve closing.
Ensuring the performance characteristics of a friction V-belt variator
Authors: Zverovshchikov Aleksandr E , Generalova Aleksandra A , Nikulin Artem A 
Published: November 2020

Abstract
In this article, we propose to modernize the design of variator pulleys, which will increase the contact area of the friction pair, ensure durability and increase the efficiency of the entire mechanism. The modernization consists in improving the working profile of the pulley, which allows for the greatest and uniform coverage of the trapezoidal V-belt with minimal distortion during tension. Parametric equations of the curve forming the pulley profile are obtained. To determine the parametric equation, the deformation of the transverse fiber of the belt was taken into account. A method for calculating the change in efficiency depending on the speed of rotation of the pulley with both straight and curved generatrix is proposed. A comparative assessment of the contact areas is carried out and the effectiveness of the proposed method for improving the operational characteristics of V-belt transmission is shown.
Model-based approach to the design of a continuous soil compaction control facility
Authors: Prokopev A P , Nabizhanov Zh I , Ivanchura V I , Emelyanov R T 
Published: November 2020

Abstract
The results of research on solving the problem of creating a dynamic model of the process of vibration compaction of road bases are considered. The investigated dynamic process is realized by a single-drum vibration roller, which is a part of a cyber-physical road-building system. The main stages of building a mathematical model of the process of interaction of a roller with a road-building mixture during compaction by the method of variable states are presented. The use of a model-oriented approach is proposed for designing a system as an automation object. The output parameters of the dynamic model of the workflow are movement, speed, drum acceleration, contact force. A simulation model of the investigated process developed on the basis of a model-based approach and implemented in the MATLAB / Simulink software environment is presented. The initial data of the roller and the compacted material are specified in the m-file. The compacted material is described by a rheological model of an elastic-viscous body. The results of modeling a numerical example of a dynamic system are presented.
Application of sequential processing of computer vision methods for solving the problem of detecting the edges of a honeycomb block
Authors: Kubrikov M V , Paulin I A , Saramud M V , Kubrikova A S 
Published: November 2020

Abstract
The article describes the application of the Hough transform to a honeycomb block image. The problem of cutting a mold from a honeycomb block is described. A number of image transformations are considered to increase the efficiency of the Hough algorithm. A method for obtaining a binary image using a simple threshold, a method for obtaining a binary image using Otsu binarization, and the Canny Edge Detection algorithm are considered. The method of binary skeleton (skeletonization) is considered, in which the skeleton is obtained using 2 main morphological operations: Dilation and Erosion. As a result of a number of experiments, the optimal sequence of processing the original image was revealed, which allows obtaining the coordinates of the maximum number of faces. This result allows one to choose the optimal places for cutting a honeycomb block, which will improve the quality of the resulting shapes.
Study of the process overcoming obstacles by tillage tools on a three-dimensional dynamometric virtual stand
Authors: Lysych M N , Shabanov M L , Bukhtoyarov L D 
Published: November 2020

Abstract
The interaction of resiliently fixed tillage tools and obstacles is investigated using computer applications that simulate the dynamics of motion of 3D models, created in CAD. The design of a virtual bench and a dynamometer block, implemented in CAD SolidWorks and an application for modeling the movement dynamics SolidWorks Motion, is described. The virtual stand allows you to simultaneously record all components of the traction resistance vector (RX, RY, RZ). With the help of a virtual stand, the volumetric force characteristics of the process of overcoming a stump by a section of a modular tillage unit were measured. Four types of tillage tools were investigated: plowing disk; cultivating disk; sweep tool; subsoiling tool. In experiments, a 20 cm stump was overcome. Conditional processing depths for tillage tools were set depending on their technological purpose. Two types of interaction were investigated: frontal and maximum lateral displacement. The greatest loads during frontal overcoming of obstacles were experienced by a plow disc tillage tool. At maximum lateral displacement, the subsoiling tool was the most loaded. The results of the experiment showed that all the investigated tillage tools are able to overcome the stump with the parameters used.
Improving the facade element surface processing of MDF case furniture
Authors: Efimova T V , Ischenko T L 
Published: November 2020

Abstract
A lot of enterprises engaged in the production of MDF case furniture face the problem of milled plate surface quality. It ensures the production of facing paper and synthetic film or finishing liquid paints and varnishes to improve the facade element surface processing quality of MDF case furniture. The experiments to study the roughness of MDF plates milled surface have been carried out, depending on the feed rate and tool rotation frequency. The work has been carried out using hard-face end mill tools manufactured in accordance with the patent for the utility model (Russian Federation), which enables to improve the quality of machined surfaces by performing finishing milling in one pass and increasing equipment productivity. The determination of the roughness parameter has been carried out in accordance with the requirements of 15612 State Standard. As a result of experimental processing, the dependences of milled surface roughness on the factors under study in the form of regression equations have been obtained. The mathematical dependencies are the results of this work. It enables to set regime parameters for profile milling of MDF surface plates to obtain the required roughness. The optimal milling mode has been determined improving surface finish facade element quality of MDF case furniture.
Comparative analysis of fraud detection systems by phone number
Authors: Sergeev V V , Gorbchenko I M , Safronov V V 
Published: November 2020

Abstract
Today, the personal data of many people is stored in the databases of a large number of organizations. Some of them use this data for advertising purposes, disturbing customers with constant calls and SMS messages. The problem is that one cannot tell for sure by looking at an unfamiliar number whether it is an unwanted call from an organization. One can use specialized software tools to solve this problem. This article is devoted to comparing their functionality.
Effect of anode materials of the Al-Ni-Zr system on the ESA process and wear resistance of coatings on steel 45
Authors: Ri E Kh , Ri Khosen , Ermakov M A , Kim E D 
Published: November 2020

Abstract
Composite alloys of nickel aluminides doped with zirconium were obtained from nickel oxide NiO and baddeleyite concentrate containing zirconium by the method of out-of-furnace alumothermal reduction. The multiphase structure of the ingot obtained by SHS metallurgy has been established by scanning electron microscopy and micro X-ray spectral analysis. With an increase of zirconium content in the alloy up to 3.52 wt.% the amount and variety of nickel aluminide phases doped with zirconium linearly increase. The influence of aluminum-matrix electrode alloys from Al-Ni-Zr on the ESA process and wear resistance of the coatings on steel 45 under various processing modes tsk/tp= 40/50 and 25/80 in the argon atmosphere and in air has been established and scientifically substantiated: The erosion resistance of the anode materials made of Al-Ni-Zr alloys does not change monotonously while changing the zirconium content in the argon atmosphere. The minimum erosion resistance of the anode alloy is observed at 1.05 wt.% Zr, and the maximum - at 3.52 wt.% Zr. The fact that erosion resistance of the anode materials in argon is lower than in air concerns all the Al-Ni-Zr alloys investigated and in all ESA treatment modes, except the anode material with 3.52 wt.% Zr; In all the cases, the greatest weight gain value at the formation of an alloyed coating during ESA (t = 10 μs) is observed when using the anode material with 1.05 wt.% Zr, which is characterized by low erosion resistance, and the smallest weight gain value - with 0.47 wt.% Zr with higher erosion resistance; the highest wear resistance is observed when the anode material contains 1.52 wt.% Zr at ESA in argon (it increases 2.8 times when compared to steel 45).
Determining the standard of fitting between ship’s stern tube and propeller
Authors: Bien Dao Ngoc 
Published: November 2020

Abstract
The stern tube is fitted with a ship’s propeller shaft with a degree of technical redundancy, to protect the shaft against corrosion by seawater and wear with a bearing shaft, during work. Currently, the calculation and selection of this assembly is still done by experience, without a clear scientific basis. This paper, which presents the calculation of the required technical redundancy for the joint between the stern tube and the ship propeller shaft, based on the load acting on the joint, from which the corresponding standard fitting is selected, ensuring the this technical redundancy.
Thermal state of the contact zone in the process of thermal friction drilling
Authors: Sherov K , Mussayev M , Sikhimbayev M , Donenbayev B , Mikhailov V , Kuanov I , Kim A , Turusbekova A 
Published: November 2020

Abstract
The article deals with mathematical modeling of the temperature field during thermal friction processing in the form of a nonlinear differential equation of the temperature field during thermal friction cutting of metals, since the dependence of the thermal conductivity coefficient on temperature is taken into account. Using the DEFORM 3D software and experimental data, it was found that during the processing of steel 30 by friction drilling, the distribution of heat flow in the tool-workpiece contact has a more uniform character and is 1000-1250°C. The convergence of the obtained results with the experimental data is 90-95%, which confirms the applicability of the DEFORM3D program for the study of thermal phenomena in the process of thermal friction drilling of structural steels.
Designs of electroadsorption mass transfer apparatuses
Authors: Merentsov N A , Persidskiy A V , Topilin M V , Golovanchikov A B 
Published: November 2020

Abstract
This paper provides new designs of electroadsorption apparatuses of continuous and semi-periodic action, with fixed, moving and fluidized layers of adsorbents. There were considered the designs of apparatuses, action principle and the main intensifying effects aimed at improving the efficiency of gas emission treatment, efficiency improving of sorption apparatuses, improving the capacity of adsorbents and extending the time of their protective action, this together forms a new direction for the development and designing of energy- and resource-saving designs of electroadsorption apparatuses for selective purification of gas emission treatment and liquid discharges for various industries, able to respond adaptively to sharp spikes in concentrations of harmful substances in streams of continuous gas (liquid) phases and adjust to emergency capture modes.
Numerical simulation of conjugated heat exchange in laminar motion of oil fluid in a well
Authors: Al’es M Yu , Makarov S S , Karpov A I 
Published: November 2020

Abstract
A mathematical model of conjugate heat transfer during the laminar movement of oil fluid in the well is proposed. The motion of a gas-liquid medium in a two-dimensional axisymmetric stationary formulation is described by the equations of the boundary layer. A case of well operation in which oil is lifted to the surface due to reservoir energyis considered. A three-component medium is presented as a mixture of two components: formation of oil with dissolved gas and formation of water. The results of numerical modeling are presented, which make it possible to analyze the thermobaric state of the well under the condition of the developing flow in the pipe at the initial stage of stabilization and taking into account the phase transition associated with the formation of paraffin deposits.
Identification model based on latent variables
Authors: Barkalov S A , Bekirova O N , Kalinina N Yu , Moiseev S I 
Published: November 2020

Abstract
The paper proposes a model for assessing the degree of conformity of an object to a standard type. Evaluation is based on criteria based on identification signs. The model is based on the Rasch’s method of estimating latent variables. This is due to the fact that the degree of belonging of the evaluated objects to the sample is a latent variable. An original method is proposed, which assumes that indicators that allow identification are distributed according to the normal law. This allows us to estimate the average deviations of indicators from a given value and, taking into account the variance, to assess the degree of belonging of the object to the original. The obtained estimates are compared with the estimates obtained by traditional methods. Using computational experiments, it is shown that the model provides adequate estimates and can be used for identification. The method of implementation of computational procedures in MS Excel is described. The advantages of the described identification model are given in comparison with traditional models that solve this problem.