bluuebunny/crossref_metadata_2025_split huggingface dataset:
Permanent magnet synchronous motor sensorless control based on rotor flux observer with low-pass filter adaptation
Authors: Bevz D V , Zavyalov V M 
Published: January 2021

Abstract
This paper presents a strategy for a permanent magnet synchronous motor sensorless vector control based on rotor flux estimation considering a rotor saliency. The integration problem in the stator flux estimation was solved by replacing the integrator with a low-pass filter. The low-pass filter parametric adaptation algorithm with phase delay compensation, based on Bode diagrams was designed for the rotor angular position estimation accuracy improving. The proposed adaption algorithm allowed to expand a stable motor control with a high accuracy in the rotor position estimation down to 15 rpm. Also the developed rotor angular position estimation algorithm together with adaptive field weakening algorithm provides a sable motor operation with a high accuracy in the rotor position estimation at the high speed.
Quantized lobe level theoretical estimates for phased array antennas applicability
Authors: Slobodyanenko A A , Edvabnik V G , Shebalkova L V 
Published: January 2021

Abstract
This paper raises the question of the applicability of some theoretical estimates of the quantization lobe level. Existing assessment methods and their features are considered. Based on numerical simulated method, statistical characteristics are constructed for the magnitude of the level of quantization lobes and, according to the proposed criterion, a conclusion is given on the consistency of theoretical estimates.
Scientific-technical developments that ensure the growth of the resource potential of the regional oil and gas complex
Authors: Novikova A S , Eremenko O V , Gancharov S A 
Published: January 2021

Abstract
The Orenburg oil and gas complex is one of the key participants in the Russian fuel-energy sector of economy. However, the Orenburg fields have moved to the final stage of operation. In this regard, the authors in article attempt to formulate and justify scientific-technical developments that allow to stabilize gas production and increase the resource potential through: the introduction of innovative geological-technical measures; the use of «CO2-technologies»; modernization of the gas collection and primary treatment system; changes in the technology of oil and condensate production; creating tools for the intellectualization of subsurface use, etc. The authors assessed the prospects of new technologies in terms of achieving sustainable gas production in the next 10 years in the amount of 10 billion m3. For all the proposed innovations, a positive economic effect was obtained, however, some of them did not affect the increase in the coefficient of hydrocarbon recovery from the reservoir, ensuring only the maintenance of the volume of raw material production at the field. The total increase in production over the calculation period will amount to 33.4 billion m3 of gas and over 0.9 million tons of stable condensate.
Road pavement crack detection using deep learning with synthetic data
Authors: Kanaeva I A , Ivanova Ju A 
Published: January 2021

Abstract
The improvement of road system quality is a critical task. The mechanism to address such important issue is close monitoring of road pavement condition. Traditional approach requires manual identification of damages. Taking into account considerable length of road system it is essential to create an effective automatic pavement defects detection tool. This approach will extremely reduce time for monitoring of current road state. In this paper global experience in solution of detection issues of road pavement’s distress is reviewed. The article includes information about the existing datasets of road defects, which are commonly used for detection and segmentation. The present work is based on deep learning approach with the use of synthetic generated training data for segmentation of cracks in driver-view image. The novelty of the approach lies in creating synthetic dataset for training state-of-the-art deep learning frameworks. The relevance of the research is emphasized by processing of wide-view images in which heterogeneous pixel intensity, complex crack topology, different illumination condition and complexity of background make the task challenging.
Time indicators of effective optimization algorithms in group load control modelling
Authors: Dimitriev A P , Bazhenov R I 
Published: January 2021

Abstract
The purpose of the work is to determine the optimal set of parameters of the genetic algorithm for optimization in the control model of the group load of electricity consumers taking into account time parameters. The analysis based on the approximation of empirical results is used as a research method. The results of two efficient algorithms used for optimization in this model are compared. Computational experiments were carried out and their results were processed, the location of efficiency of the parameters of the combined genetic algorithm was determined.
The dependence between the ignition value of air suspension and the size of the reaction chamber
Authors: Sechin A I , Sechin A A , Patrakov Yu F , Mezenceva I L , Amelkovich Yu A 
Published: January 2021

Abstract
The influence of the geometric factor of the reaction chamber on the limit value of the air suspension ignition is studied. It is found that in determining the lower concentration limit of the flame propagation (LCLFP), it is most promising to use an installation with a cylindrical reaction chamber whose height is equal to the diameter. The dependence of the determination of the LCLFP value on the geometric factor of the reaction chamber is proposed, tested on metal powders and organic dust-forming materials. The expression allowing to carry out the comparative analysis of scientific results received on other technical devices with the results received on the installations executed according to the requirements of normative and technical documentation is received that significantly reduces the volume of experimental works.
Modification of ANFO detonation parameters by biowaste addition
Authors: Uranchimeg E , Narantsetseg M , Purev L 
Published: January 2021

Abstract
The present study relates to modification of ammonium nitrate fuel oil mixture. For many years, ammonium nitrate fuel oil has been one of the most popular explosives for use in mining operations. Therefore, it is manufactured and used widely in large volume. Although ammonium nitrate is a relatively strong oxidation agent, it is insufficient to detonate by itself. Therefore, it is generally admixed with liquid fuel such as diesel and various modifiers. Trinitrotoluene (TNT) and metal aluminium are typically used as additive. This paper studies ammonium nitrate fuel oil (ANFO) composition modified by biowaste dung as additive to generate efficient explosion and to result low cost blasting.
The experiment results of modified ANFO with biowaste dung as additive illustrate that physical stability and absorption increased by 5% percent compared to regular ANFO. Also was revealed that average detonation brisance increased from 20.5 to 27.5 mm and detonation speed increased from 2300 to 3800 m/s compared to regular ANFO. This modified ANFO is lowered blasting cost from 50 to 150 tugriks per 1kg ANFO compared to aluminium and TNT additives.
The mechanoenzymatic method for enhancing the biological value of condensed cream soups
Authors: Bychkova E , Pogorova V , Gosman D , Dome K 
Published: January 2021

Abstract
Condensed creamy pea soups of high biological value have been developed. A stage comprising enzymatic hydrolysis in combination with mechanochemical treatment of raw material was proposed as a method to increase the content of free amino acid and short peptides in the finished product. Evaluation of physicochemical quality parameters demonstrated that the samples had high nutritional and biological value.
Measurement of electron beam transverse flux density distribution
Authors: Bulavskaya A A , Cherepennikov Yu M , Chakhlov S V , Grigorieva A A , Miloichikova I A , Vukolov A V , Stuchebrov S G 
Published: January 2021

Abstract
The work presents experimental measurements of electron beam transverse flux density distribution. Experimental data is recorded during the multiple beam scanning in different directions with the particular angle step by the thin scintillation strip. The intensity of the light generated in the scintillator is proportional to the intensity of the radiation going through the strip. Generated photons is guided by the optical fiber to the photomultiplier and registered by the analyzer. The result of the work is the experimental data demonstrated dependence of the radiation intensity on detecting strip position and angle orientation. This dependence is transformed to the radiation intensity dependence on the coordinates in the beam transverse plane using special mathematical processing.
Registration and processing system of digital speckle images
Authors: Korotina E A , Gubarev F A , Gandzha T V , Liushnevskaya I D 
Published: January 2021

Abstract
In this paper, we discuss an application of the method of laser-speckle correlation for studying the blood coagulation process. A module for recording and processing speckle images based on a debugging kit for the Atxmega128A1 microcontroller has been developed. The results of testing the developed module as part of a laboratory setup based on a semiconductor laser using standard reagents are presented.
Feasibility demonstration of back-to-back method for induction traction motors testing
Authors: Beyerleyn E V , Tyuteva P V , Dorzieva B S 
Published: January 2021

Abstract
The authors present the feasibility demonstration of energy-saving back-to-back test method implementation for induction traction motors testing. The results of theoretical and physical modeling that support the energy effectiveness and usefulness of the proposed back-to-back method are presented in the article. The effectivity ratio of the test circuit has been calculated due to confirm the energy effectiveness and feasibility of the proposed method, and also authors identified a number of advantages of the back-to-back method for high power induction traction motors.
The efficiency of combined electrothermal and electrochemical accumulation of electricity of a photovoltaic power plant
Authors: Lukutin B V , Muravyev D I , Ryzhkova A V 
Published: January 2021

Abstract
The relevance of the research is caused by the fact that renewable energy, in particular, photovoltaic generation is becoming essential support in the decentralized systems in Russia. However, the high cost of the power equipment of photovoltaic power plants is a deterrent to their wide practical application. This paper presents the method for reducing the cost of photovoltaic power plants by optimizing energy conversion processes in isolated power supply systems. The characteristics of equipment for photovoltaic generation and the subsequent conversion of parameters and power storage is an urgent task are presented.
Method of multispectral image fusion using wavelet spectra
Authors: Borisova I , Legkiy V 
Published: January 2021

Abstract
The method of image fusion for images of the same scene obtained in different spectral ranges with the formation of an integrated monochrome image is considered. The fusion method is based on the wavelet decomposition of the original images. A strategy for fusing detail coefficients by comparing the proportions of their magnitudes for all original images is proposed. The fusion procedure does not require any thresholds. The algorithm does not introduce additional distortions and collects all the necessary information from the original images. The proposed algorithm can be used in optoelectronic systems for automatic image processing.
Perspective direction of shaped charges perfecting
Authors: Grif E M , Guskov A V , Milevskij K E 
Published: January 2021

Abstract
The paper analyzes the achievements of modern research in the area of increasing the penetration diameter in the operation of shaped charges. The functioning of cumulative charges with various forms of cumulative lining is simulated numerically in Ansys Autodyn software. Ways of further development of the issue and explores the possibilities of functioning of shaped charges with a lining complex conical-ring type are discussed. Proposals for improving the cumulative lining of a complex conical-ring type are advanced, substantiated and numerically modelled.
Algorithm for markers detection on fringe images
Authors: Ubert A I 
Published: January 2021

Abstract
Thanks to non-contact scanning technology and its harmlessness to human health, the usage of numerous 3D scanners in various fields of medicine has considerably increased. For example, in orthopaedics, medical topographic system TODP uses structured light with fringe projection to determine the 3D relief of the dorsal surface of the trunk for the urgent task of diagnosing spinal deformities. To improve the accuracy of postural states analysis, anatomical landmarks of the skeletal bone structures are marked with high-contrast small-sized markers of the reflective film. Thus, the task of the marker’s detection in the image appears. The article discusses the algorithms for detection of small-sized bright markers in fringe images, obtained by the computer optical topography method. The experimental results have shown that the proposed algorithm can detect 99.94% of the reflective markers in a sample of 1000 images with 8350 markers in total.
Study of aluminium nanopowder combustion by method of laser-speckle correlation
Authors: Li L , Mostovshchikov A V , Ilyin A P , Gubarev F A 
Published: January 2021

Abstract
In this paper, we discuss an application of the method of laser-speckle correlation for studying the combustion process of aluminium nanopowder in air and its mixture of iron nanopowder. It is suggested to characterize the combustion process using the statistic parameter – correlation coefficient. The principle of observation is explained and the experimental schema for investigating is provided. The differences between aluminium nanopowder and its mixture with iron nanopowder are also considered.
The choice of feedstock for the biodiesel production with optimal physicochemical and low-temperature properties
Authors: Belozertseva N E , Bogdanov I A , Balzhanova A T , Kirgina M V 
Published: January 2021

Abstract
The transesterification reaction of sunflower, mustard and linseed oil with ethyl alcohol was studied using potassium hydroxide as a catalyst. The physicochemical properties and low-temperature characteristics of the feedstock and obtained products were studied. The most preferred feedstock for the biodiesel fuel production had been determined.
Engineering a cyclone pre-furnaces’ calculating method for combustion fine water-coal suspensions
Authors: Boyko E E , Ovchinnikov Yu V 
Published: January 2021

Abstract
The article is devoted to the method of engineering calculation of the cyclone pre-furnace for incineration of fine coal-water suspensions. This type of device use for ignition and burning fine water-coal suspension. At present there is still no methods allows to make engineering calculations in order to obtain physical damnations of cyclone pre-furnaces for this type of fuels.
Investigation of the properties changes observed for plastic samples made by fused deposition modelling under radiation exposure
Authors: Bulavskaya A A , Cherepennikov Yu M , Grigorieva A A , Miloichikova I A , Toropkov N E , Stuchebrov S G 
Published: January 2021

Abstract
This work shows investigation of the transmission dynamics of polymer samples made of PLA plastic (polylactide) by fused deposition modelling for electron beam. Besides, results of tests for mechanical destruction (compression) of plastic samples with radiation exposure and without are shown. Article demonstrates that properties of plastic samples are stable up to 1.5 kGy, that proves the suitability of this material for sample production intended for depth dose distributions of electron beams.
Aircraft landing gear with electromagnetic damper
Authors: Zagidulin A R , Podruzhin E G 
Published: January 2021

Abstract
The article describes the design and computation of the aircraft landing gear with an electromagnetic-gas shock absorber. A numerical simulation of the landing impact was carried out at different values of the initial vertical velocity. The dependence of the optimal electric current in the winding of the shock absorber electromagnet on the vertical speed is obtained.
The influence of the method of an arc discharge initiation on the product of plasma dynamic synthesis in the W-C system
Authors: Sivkov A A , Nikitin D S , Shanenkov I I , Nassyrbayev A , Rakhmatullin I A 
Published: January 2021

Abstract
Cubic tungsten carbide WC1−x is distinguished by the difficulty of obtaining in a dispersed and bulk form. The article attempts to plasma dynamic synthesis of cubic tungsten carbide in powder form. The method is based on the use of a coaxial magnetoplasma accelerator for the generating a supersonic plasma jet, which is then rapidly cooled. The possibility of obtaining a powder with a predominant content of WC1−x (up to 95%) is shown. Studying the influence of the method of an arc discharge initiation allowed to reveal the efficiency of using graphitization in comparison with carbon fibers.
A computational fluid dynamic approach to validate the wind effect in air pollution of Ulaanbaatar city
Authors: Bulgansaikhan B , Ulziibayar V , Munkherdene Ts 
Published: January 2021

Abstract
In the past two decades, inhabitants of Ulaanbaatar city have been increased more than three times. The Air and soil of Ulaanbaatar city contaminated seriously due to the densely populated behavior. We proposed to develop a massive computational model for pollution, which cares about contamination factors. This paper is a part of the purpose. We consider the filtered equation express conservation of mass and momentum in a Newtonian incompressible flow in a computational fluid dynamic model for Ulaanbaatar’s wind field. The terrain around the city has been built for numerical computation. The finite element method was used for numerical analysis, from the results, we can characterize the wind field.
Novel DC arc plasma method for super dispersed metal carbides synthesis
Authors: Pak A Ya , Mamontov G Ya , Vassilyeva Yu Z 
Published: January 2021

Abstract
This paper presents the experimental results of metal carbides synthesis by DC arc discharge plasma in ambient air. The results indicate that the synthesis takes place in the atmosphere of CO and CO2, which are generated during the DC arcing process on graphite electrodes and that mixture of CO and CO2 prevents the reaction zone from air oxygen. The paper introduces experimentally substantiated arguments about the possibility of obtaining metal carbides by the developed arc discharge method. By the moment, the authors have already obtained silicon carbide and titanium carbide in this way.
The approach to construction and discretization of complex 3D models of geological media in software for airborne geophysical surveys maintenance
Authors: Soloveichik Y G , Persova M G , Kiselev D S , Trubacheva O S , Kondratyeva N S , Grif A 
Published: January 2021

Abstract
The paper presents a new approach to construction of complex geological models and generation of finite element meshes in order to perform 3D modeling and multidimensional processing of airborne geophysical data. The main principles of geological models construction are considered. They are based on defining geological models in terms of the subject field and take into account their main specifics: complex background media, curvilinear Earth surface relief and borders between the geological layers, complex shape of target objects, etc. We consider the necessary data structures and specifics of finite element mesh generation. The example of generation of the finite element mesh for a geological model typical of airborne geophysical surveys is shown.
Prospects for the use of wireless reading of prosthetic control signals and methods for generating commands
Authors: Malakhov D , Zhmud V , Avrmachuk V , Gryaznov D , Nosek J , Dimitrov L 
Published: January 2021

Abstract
The paper provides a rationale for the use of low-power wireless communication to create non-invasive bionic limb prostheses. The need for such a connection is dictated, on the one hand, by the expediency of using sensors located in various parts of the body, often very remote from each other, on the other hand, by the desire to free the disabled person’s body from the wires that would envelop it like a spider web. For each of these positions, arguments are given.
Generalization of data on heat exchange within a gas mixture with a small value of Prandtl numbers in channels of different forms
Authors: Elistratov S L , Slesareva E Yu 
Published: January 2021

Abstract
The article presents an analysis of data on heat transfer in the channels of a round and triangular shape with a flow of a gas mixture with a small Prandtl number. It is shown that for the Reynolds number in the interval from 9500 to 49000 the heat-transfer coefficient depends from the length a heat exchange section in tube. Using the dependence of the Nusselt number Nu(Ψ) from a dimensionless parameter Ψ=1/Pe×x/D

h
, we can describe the experimental data for the input region of the round and triangular channels, taking into account the channel length and the distances from the input. The adequacy of the model was checked by comparing the proposed dependence with the experimental data of various authors.
Study on interfacial tension of surfactant and its oil displacement performance
Authors: Na Risu , Erofeev V I 
Published: January 2021

Abstract
Tuha oil field is located at the Turpan basin in China. Currently, the water content of the main reservoir of the section Y-6 of the Tuha oil field is more than 93% and the recovery rate is less than 20%. At present, an efficient oil displacing agent must be selected for this oil field, which can be used in reservoirs with a high degree of mineralization. Based on the results of experiments measuring the interfacial tension of the surfactant solution and oil, a non-ionic surfactant was selected. Non-ionic surfactant can reduce interfacial tension to the ultra-low level (10−3 mN/m), and when the amount of adsorption by oil sand is 3, interfacial tension also can maintain at the level of 10−2 mN/m, so the solution of non-ionic surfactant has good anti-adsorption ability. The results of the oil displacement experiments show that the solution of a non-ionic surfactant can increase the efficiency of oil displacement. But under condition of high water cut, the dominant flow channel in the core is formed, and the surfactant solution flows into the main channel preferentially and reduces the residual oil saturation in the main channel, which leads to a decrease in the resistance coefficient and injection pressure. Therefore, after water flooding, take measures to control the fluid profiles firstly so that the following surfactant solutions change direction in areas not exposed to water in order to achieve the best effect of the increase in oil recovery.
Wettability inversion of aluminum-magnesium alloy surfaces
Authors: Islamova A , Orlova E 
Published: January 2021

Abstract
The paper presents the experimental results on the use of low-temperature heating to reduce time of wetting inversion (from superhydrophilicity to hydrophobicity) of aluminum-magnesium alloy surfaces textured by laser radiation. Stable growth of the contact angle to 137.3–144.2° after heating surfaces (wettability properties deteriorate) was recorded. Wetting inversion from superhydrophilicity to hydrophobicity occurs in 2–3 hours of low-temperature heating of textured samples. The wettability inversion time depends on the type of texture. A significant increase in carbon content of elemental composition of the near-surface layer of samples after their low-temperature heating was registered.