bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of the installation and experimental research of the patterns of change in influencing factors in the process of tomato drying
Authors: Rasulov Shukhrat , Artikov Askar , Abidov Kamiljan , Djuraev Khayrullo 
Published: December 2022

Abstract
Annotation. The scientific research illustrates that experimental installation of a cylindrical type for the combined drying of highly moist agricultural products, using the example of a tomato, the regularities of the course of mass transfer processes are studied and the technological process is described. In order to determine the main influencing parameters in the process of drying tomatoes grown in a regional climate, an effective method of heat transfer system was used to study the kinetics of dehydration of wet material. A plan of a multifactorial experiment was developed, on the basis of which the boundary conditions of the influencing factors on the drying process were determined, with the study of the mechanism of moisture mixing over the layers of the material, a tomato drying curve was constructed depending on time, as well as the amount of energy consumed to remove 1 kg of moisture from the dried material.
Experimental determination of the law of vibration of the improved jet mechanism of the sewing machine
Authors: Mavlonova Iroda , Fayziev Sirojiddin , Rakhimov Khakimboy , Vokhidova Munira 
Published: December 2022

Abstract
The article presents the results of experimental determination of the oscillation law of the proposed additional conical spring mechanism of the effective reaction. The results of calculation of compressive strength and spring elasticity are presented. The change in the force acting on the reaction is determined by the electrostrain method and is based on its parameters.
Mathematical modeling of factors influencing the process of filling karakul semi-finished products
Authors: Kazokov Farkhot , Kodirov Tulkin 
Published: December 2022

Abstract
This article discusses the results of research aimed at solving the problem of increasing the operational durability of dressed astrakhan fur in a fur coat. To solve it, an approach was chosen based on an understanding of the physicochemical processes occurring in the material under the influence of operational factors. The use of the developed method, which gives an unambiguous assessment of the material, made it possible to investigate the dependence of the durability of the material on the parameters of the technological process of its manufacture.
Instrumentation complex for measuring the thermophysical properties of rocks in natural occurrence temperature conditions
Authors: Kalyak A A , Kazantsev S A , Gruznov V M , Zasypkina I I 
Published: December 2022

Abstract
A schematic diagram and an operation algorithm of an instrumentation complex for measuring the thermal conductivity and thermal diffusivity of rocks by the non-stationary method of a linear source under natural occurrence temperature conditions up to 200 °C are proposed. Thermocouples are used to measure the temperature of the probes. The complex contains two linear (needle) probes, which are placed in a rock sample at a certain distance r from each other. One probe, containing a linear heater and a thermocouple, radiates heat, the other one, containing a thermocouple, is a measuring probe. The cold junction temperature of thermocouples is measured by a semiconductor sensor. To calculate the voltage of the cold junction from the value of its temperature, a direct conversion of thermoEMF by a power polynomial is used. To calculate the temperature of the hot junction of the probe, an inverse transformation by a power polynomial of the voltage values of the hot junction of thermocouples into temperature was applied. In direct and inverse transformations, the degree of polynomials is 10. To reduce the temperature measurement error, digital filtering of signals from thermocouples was used. A digital-to-analogue converter is included in the heater circuit of the radiating probe for flexible heating control. The results of measuring the thermal conductivity and thermal diffusivity of dry and wet sand samples are consistent with the literature data on the temperature dependence.
Improved dusty gas cleaning in open-cast automobile transport
Authors: Zinurov V E , Kharkov V V , Madyshev I N , Dmitrieva O S , Dubkova N Z 
Published: December 2022

Abstract
Service life extension of internal combustion engines is an urgent task for open-cast automobile transport. Dust contamination of oil and constructive elements of the internal combustion engine accelerates its wear and tear, resulting in breakage. The authors developed a separation device with sections of double-T elements as a replacement for the first stage cleaning device in open-cast automobile transport. Numerical results show that the proposed separation device provides gas cleaning with high efficiency from fine, medium, and coarse solid particles. The use of this device improved the overall efficiency of gas cleaning and extended the service life of the fine filter, which has a positive effect on the internal combustion engine. Studies have shown that the separation device has an average efficiency of 81.2% with the following parameters: dust particle size 5–20 μm, dust particle density 1000–7000 kg/m3, inlet gas velocity 3–15 m/s.
Experimental work on determining the coordinates of an underground active vibration sensor for diagnosing main pipelines
Authors: Kokhonkova E A , Maykov O A 
Published: December 2022

Abstract
The article deals with the problem of determining the location of the main underground pipelines, using the method of subsurface location. To date, the problem of registering the deviation of the location of underground pipelines from the design one, in the conditions of the Far North, when laying pipelines in unstable soils, remains relevant. The displacement of the pipeline in the ground leads to the formation of stressed sections of the pipeline walls, in which cracks may form, followed by leakage of oil products into the environment.
Multispectral lidar method for monitoring the forest ecosystem under the forest canopy
Authors: Belov M L , Belov A M , Gorodnichev V A , Alkov S V , Ivanov S E , Shkarupilo A A 
Published: December 2022

Abstract
This study demonstrates the potential of the multispectral lidar method to monitor the forest ecosystem under the forest canopy. The mathematical modeling results of forest territories elements classification on the created neural network using experimentally measured reflection coefficients are presented. It is shown that the neural network provides a high probability of correct classification for the forest ecosystem elements classification task (when using lidar measurement data about the height of the forest ecosystem elements). Laser pulse sounding at two wavelengths in near infrared spectral range 1064 and 2030 nm and the created neural network provide the probabilities of correctly classify the undergrowth of green broadleaved and coniferous trees, swamps and soils more than 0.84 and the probability of incorrect classification less than 0.08.
Changes in the absorption coefficient of solar spectrum concrete over time under variable technological factors and introduced color compositions into the concrete mixture
Authors: Usmanov Farkhod , Usmanova Gulrukh , Sadikov Mizrob , Kakhhorov Hamid , Yakhshiev Yokub 
Published: December 2022

Abstract
The absorption coefficient of concrete from different wavelengths of the solar spectrum has been studied for varying technological factors. Experimental studies have established a pattern of changes in the absorption coefficient of freshly laid concrete over time.
Analysis of modern methods of determination of mechanical status and diagnostic models of power transformers
Authors: Fazliddinov Salokhiddin , Kuchkarov Behzod , Sharibaev Nosir , Abdulkhaev Abror , Tulkinov Mukhammad-Ali 
Published: December 2022

Abstract
The development and modernization of methods for analyzing the mechanical condition of power transformer windings remains an urgent task. The main reason for this is that many interruptions in the electrical system are caused by faults in the windings of power transformers. With this in mind, we have developed methods for analyzing the mechanical condition to overcome these shortcomings and recommend its application in practice. It should be noted that the assessment of the state of the number of coils by the method of frequency reaction analysis is the most promising direction in the field of packaging diagnostics this method provides the best sensitivity to changes in the geometric dimensions of the packaging reflected.
Stability of a weakly collisional plasma with runaway electrons
Authors: Grasso Daniela , Borgogno Dario , Singh Lovepreet , Subba Fabio 
Published: December 2022

Abstract
We investigate the problem of the tearing stability of a post-disruption weakly collisional plasma where the current is completely carried by runaway electrons. We adopt here a two fluid model which takes into account also ion sound Larmor radius and electron inertia effects in the description of the reconnection process. In the past, it has been demonstrated in [Helander et al. Phys. Plasmas
14, 12, (2007)] that in the purely resistive regime the presence of runaway electrons in plasma has a significant effect on the saturated magnetic island width. In particular, runaway electrons generated during disruption can cause an increase of 50% in the saturated magnetic island width with respect to the case with no runaway electrons. These results were obtained adopting a periodic equilibrium magnetic field that limited the analysis to small size saturated magnetic islands. Here we present our results to overcome this limitation adopting a non-periodic Harris’ type equilibrium magnetic field. Preliminary results on the effects of the ion sound Larmor radius effects will also be presented.
Resonant transport of fusion alpha particles in quasisymmetric stellarators
Authors: Albert C.G. , Rath K. , Babin R. , Buchholz R. , Kasilov S.V. , Kernbichler W. 
Published: December 2022

Abstract
In modern, highly optimized stellarator configurations where prompt fusion alpha particle losses from the plasma core are absent, alpha particles can still be lost due to stochastic orbits which result in delayed losses. One mechanism leading to stochastic orbits are changes in the particle trapping class during drift motion along the contours of the parallel adiabatic invariant J
∥ leading to jumps in J
∥ when crossing class boundaries. Another mechanism, which is of main interest here, is the resonance between particle drift and bounce motion (drift-orbit resonance). The first mechanism affects mainly trapped particles near the trapped-passing boundary in the phase space of quasi-symmetric and quasi-isodynamic devices, and can be minimized there by aligning local magnetic field maxima on a given flux surface. The second mechanism may affect a broader range in the trapped particle domain where contours of J
∥ still remain closed. Drift-orbit resonances modify the topology of orbits leading to island-like structures on Poincaré plots where these islands may overlap thus leading to the stochastic transport. In this report, we study this stochastization mechanism in quasi-symmetric stellarator configurations with help of the Hamiltonian drift-kinetic code NEO-RT as well as orbit classification and direct computation of fusion alpha losses within the symplectic orbit following code SIMPLE. The width and overlap of resonances in phase-space is studied using Hamiltonian perturbation theory. Based on optimized reactor configurations we assess if this approach can be used as a fast metric for fusion alpha losses in stellarator optimization.
Role of avalanche transport in competing drift wave and interchange turbulence
Authors: Ghendrih Philippe , Dif-Pradalier Guilhem , Panico Olivier , Sarazin Yanick , Bufferand Hugo , Ciraolo Guido , Donnel Peter , Fedorczak Nicolas , Garbet Xavier , Grandgirard Virginie , Hennequin Pascale , Serre Eric , Tamain Patrick 
Published: December 2022

Abstract
We complete the 2D 2-fields turbulence model previously used with an interchange-like instability by slightly modifying the parallel loss terms to drive drift wave instabilities. We show that the instability driven by temperature fluctuations of the sheath losses is identical to that of the drift wave turbulence. The linear analysis is performed and used to select control parameters that yield identical maximum growth rates for the interchange alone and drift wave alone instability. Combining the two instabilities doubles the maximum growth rate. The non-linear simulations are used to analyse the SOL width. The simulations allow one to identify a low field side SOL region where interchange and drift wave are unstable and a high field side SOL region where only the drift wave is unstable. The SOL profiles appear exponential in the region close to the source but depart from a simple exponential fall-off in the far SOL. The low field side SOL width is found to be larger in the interchange alone case, slightly smaller when both instabilities are present and finally narrower when only the drift waves. For the high field side SOL, without interchange, the drift wave SOL width is observed to be identical to that on the low field side and larger than that when both instabilities at play. The Sherwood dimensionless parameter, ratio of convective particle flux divided by the diffusive particle flux, is used to compare the efficiency of turbulent transport. The profiles of the Sherwood parameter for time and flux surface averaged transport indicate that turbulent transport is dominant close to the separatrix but is less effective towards the far SOL. The Sherwood parameter evolution, determined with the flux-surface averaged transport, indicates that outward avalanche transport with corrugations governs the case with interchange only. When combining the two instabilities, outward avalanche transport is less pronounced and inward avalanche transport is observed, reducing the overall turbulent transport efficiency. The avalanche transport with drift waves only compared to interchange only is found to be inhibited.
On the vertical and horizontal profiles of the atmospheric electric field during thunderstorms
Authors: Chilingarian A , Hovsepyan G , Karapetyan T , Sargsyan B , Zazyan M 
Published: December 2022

AbstractWe present the first results of a new experiment on Mt. Aragats for measuring the horizontal profile of atmospheric electric fields during thunderstorms. Networks of advanced particle spectrometers operated on the slopes of Mt. Aragats continuously measure fluxes of charged and neutral particles, periodically registering impulsive enhancements, so-called Thunderstorm Ground Enhancements (TGEs). This gives the possibility to estimate the strength of the electric field in the lower atmosphere. Relativistic Runaway Electron Avalanches (RREAs) are registered by the particle detectors located on the Earth's surface as TGEs sometimes exceeding the fair-weather fluxes up to a hundred times. The strong accelerating electric field can reach 1.7-2.2 kV/cm at altitudes 3-6 km, and extend down to 50-150 m above the Earth's surface. The horizontal extent of the electric field can reach 10 km and more.
Classification and Reconstruction of single and multiple ELVES in AUGER
Authors: Mussa R , Vasquez A. 
Published: December 2022

Abstract
ELVES have been regularly studied since 2013 with the twenty-four telescopes of the Pierre Auger Observatory, exploiting a dedicated trigger and extended readout. A large fraction of the observed events shows double ELVES within the time window, and, in some cases, even more complex structures are observed. We classify double ELVES using the radial variation of the time gap and the photon flux ratio between flashes. Such parameters may be related to the different types of lightning in which they originated. We will review the cross correlations of the ELVES light emissions with the radio waves detected by the antennas of the ENTLN network, active in Argentina since late 2018. Further improvements of our detection and classification algorithms were achieved by detecting ELVES from closer lightning: since December 2020, the ELVES trigger was extended to the three High Elevation Auger Telescopes (HEAT), which observe the night sky at elevation angles between 30 and 60 degrees, with an enhanced time resolution (50 ns time binning). Both single and double ELVES are recorded with unprecedented time and space resolution. Events from the first year of data taking will be shown.
Seven years of quasi-continuous LIDAR data
Authors: Gaug Markus , Hahn Alexander , Acciari Victor , Besenrieder Jürgen , Prester Dijana Dominis , Dorner Daniela , Fink David , Font Lluís , Fruck Christian , Mićanović Saša , Mirzoyan Razmik , Pavletić Lovro , Schmuckermaier Felix , Will Martin 
Published: December 2022

Abstract
We have analyzed seven years of quasi-continuous LIDAR data taken during those nights when the MAGIC telescopes were operating. Characterization of the nocturnal ground layer is possible through an absolute calibration of the LIDAR during clear nights and yields zenith and azimuth-angle dependent aerosol extinction scale heights for clear nights. We derive aerosol transmission statistics for light emitted from various altitudes throughout the year and separated by seasons. We find further seasonal dependencies of cloud base and top altitudes. The Cumbre Vieja volcano dust plume observation is shown to highlight the possibilities and limitations of our method.
Assessing aerosol induced errors in Monte Carlo based air-shower reconstruction for atmospheric Cherenkov detectors
Authors: Holch T L , Leuschner F , Schäfer J , Steinmassl S 
Published: December 2022

Abstract
Aerosol levels influence the wavelength dependent transmission properties of the atmosphere. Variations in aerosol levels therefore affect the amount of Cherenkov light from air-showers that can reach an atmospheric Cherenkov detector. As the amount of detected Cherenkov light is directly related to a primary shower particle’s energy, deviations between actual and assumed atmospheric transmission properties yield errors in reconstructed particle energies as well as energy axes of instrument response functions. In this work, a scheme is presented to assess this influence and potentially reduce related errors in the air-shower reconstruction. The proposed scheme relies on estimations or measurements of the aerosol optical depth and atmospheric density profile which are then used in radiative transfer simulations to generate atmospheric transmission profiles. As the scheme furthermore uses detector specific quantum efficiencies and generalised shower evolution models, it does not rely on detailed Monte Carlo simulations for the different atmospheric conditions but only on the transmission profile which the initial shower reconstruction algorithm is based on. The approach is derived and presented on the example of the H.E.S.S. experiment which employs imaging atmospheric Cherenkov telescopes in the Khomas Highland of Namibia to detect gamma rays in the GeV to TeV energy range.
Remaining Useful Life Prediction Based on CNN-BGRU-SA
Authors: Sun Junjie , Zheng Lehui , Huang Ying , Ge Yu 
Published: December 2022

Abstract
Remaining Useful Life (RUL) prediction has very high importance for improving the safety and reliability of equipment, and its accurate estimation can provide technical support for fault Prognostics and Health Management (PHM). A hybrid deep neural network model has been proposed to improve the prognosis accuracy of equipment RUL. Convolution Neural Network (CNN) is used to extract the local features with Bidirectional Gated Recurrent Unit (BGRU) capturing the anterior and backward long-term dependence and then Self Attention (SA) assigning weights. Finally, Fully-Connection Network (FCN) is stacked to output the RUL prediction value, and its superiority is verified on C-MAPSS dataset. Experimental results show that CNN-BGRU-SA acquires better prognosis performance compared with a single network and the approach based on the BLCNN model, with high accuracy and generalization.
Design of a Curved Surface Adaptive Permanent Magnet Wall Climbing Robot
Authors: Zhu LuShan , Zheng XiongSheng 
Published: December 2022

Abstract
At present, there are more and more wall climbing robots applied to metal surfaces at home and abroad, and traditional wall climbing robots can no longer meet the needs of reality. In this paper, a wall climbing robot structure based on a flexible track with variable curvature is designed. By increasing the contact area between the caterpillar and the contact surface, the structure principle, static analysis, and simulation of the influence of wall thickness and air gap on the adsorption capacity of the permanent magnet are introduced. The prototype is manufactured to verify its feasibility. The result proves that. The wall climbing robot designed in this paper can move with the load on the variable curvature elevation and has a certain adaptive ability of variable curvature and obstacle surmounting ability.
Research on Intelligent Vehicle Trajectory Tracking Control
Authors: Zhu Boqing , Du Feng , Shi Zhehui , Liu Chang 
Published: December 2022

Abstract
In order to make the trajectory tracking of the intelligent vehicle has good tracking accuracy. In this article, a horizontal and vertical cooperative control strategy is proposed. This measure takes vehicle dynamics model as the research object, and the feedforward control is added to the lateral controller to make up for the deficiency of LQR tracking. The longitudinal dual PID control algorithm is used to track the trajectory of the intelligent vehicle in the longitudinal controller. In CarSim with Simulink environment set up a simulation model of the design of five polynomial trajectory simulation experiments. The experimental results show that in low-speed real driving conditions, this control method has better tracking accuracy and stability in tracking there is very good.
Design and Research of Test Bench for Loading and Performance Testing of Aerospace Precision Ball Screw
Authors: Zhanga Yang , Fan YuanXun , Xu LuHui 
Published: December 2022

Abstract
Aiming at the problem of insufficient research on the motion failure caused by the degradation of the grease of the precision ball screw pair under the typical working conditions of high frequency and high load in aerospace, a set of high frequency inertial loading test bench is designed. Loading and performance testing functions are integrated. The mechanical structure of the test bench, the inertia adjustment device and the connecting member of the pendulum rod are designed, which can simulate the loading under aerospace conditions. Installing multiple sensors can test the force response characteristics, vibration characteristics, temperature rise characteristics and transmission efficiency of the precision ball screw pair when it operates under different frequencies and different axial forces. The axial force of the nut with different rotational speeds under inertial load is tested by experiments.