bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reconstruction and electronic properties of β-Li3PS4|Li2S interface
Authors: Wei Chengdong , Xue Hongtao , Li Zhou , Zhao Fenning , Tang Fuling 
Published: November 2021

Abstract
The morphology and properties of the interface between solid electrolyte and electrode have important impacts on all-solid-state lithium-sulfur batteries’ performance. We used the first-principles calculations to explore the interface between Li2S cathode and β-Li3PS4 (lithium thiophosphate, LPS) solid electrolyte, including lattice structure, mechanical, electrical properties, interface contact type, and charge distribution in real space. It is found that the interface is significantly reconstructed, and the Li atoms at the interface move mainly parallel to the interface plane. The interface density states introduce metallic properties, mainly contributed by the Li-s and S-s, -p orbitals in Li2S and S-p orbitals in LPS. The highest occupied molecular orbitals of the LPS electrolyte are lower than the electrochemical potential (Fermi level) of the Li2S cathode, thus the electrolyte and cathode materials are reasonable and stable in thermodynamics. Interface density of states shows electrons on the interface do not penetrate from Li2S into LPS, and do not leak electrons to cause electron conduct in LPS. Besides, the interface is an n-type Schottky barrier with a barrier value of 1.0 eV. The work-function of the interface indicates that there is a space charge layer (SCL) by the redistribution of electrons, which is in agreement with the result of interface charge density difference. The electron/hole pairs will be separate, realizing high current charge and discharge capability because of the SCL.
Universality of mesoporous coal gasification slag for reinforcement and deodorization in four common polymers
Authors: Zhang Jiupeng , Zuo Jing , Liu Yang , Zhang Junyu , Fu Wenjing , Zhang Jinyi , Miao Shiding , Wei Cundi 
Published: November 2021

Abstract
Mesoporous adsorbents and polymer deodorants are difficult to implement on a large scale because of their complicated preparation methods. Herein, a mesoporous adsorbent (CGSA) with a specific surface area of 564 m2 g−1 and a pore volume of 0.807 cm3 g−1 was prepared from solid waste coal gasification slag using a simple acid leaching process. The adsorption thermodynamics and adsorption kinetics results verified that the adsorption mechanism of propane on CGSA was mainly physisorption. Then the universality of CGSA in different polymers was investigated by introducing CGSA and its commercialized counterparts (CaCO3, and zeolite) into four common polymers. When the filler content was 30 wt%, the average reinforcement effect of CGSA on the tensile, flexural, and impact strengths of the four polymers was 46.68%, 83.62%, and 211.90% higher than that of CaCO3, respectively. Gas chromatography results also showed that CGSA significantly decreased total volatile organic compound emissions from the composites, and its optimal deodorization performance reached 69.58%, 81.33%, and 91.09% for different polymers, respectively, far exceeding that of zeolite. Therefore, this study showed that low-cost, high-performance, and multifunctional mesoporous polymer fillers with excellent universality can be manufactured from solid contaminants.
Preparation of novel porous Al2O3–SiO2 nanocomposites via solution-freeze-drying-calcination method for the efficient removal of uranium in solution
Authors: Wu Maoling , Ding Ling , Liao Jun , Zhang Yong , Zhu Wenkun 
Published: November 2021

Abstract
In this work, the efficient extraction of uranium in solution using Al2O3–SiO2-T was reported. Kinetics and isotherm models indicated that the removal process of uranium on Al2O3–SiO2-T accorded with pseudo-second-order kinetic model and Langmuir isotherm model, which showed that the adsorption process was a uniform mono-layer chemical behavior. The maximum adsorption capacity of Al2O3–SiO2-T reached 738.7 mg g−1, which was higher than AlNaO6Si2 (349.8 mg g−1) and Al2O3–SiO2-NT (453.1 mg g−1), indicating that the addition of template could effectively improve the adsorption performance of Al2O3–SiO2 to uranium. Even after five cycles of adsorption–desorption, the removal percentage of uranium on Al2O3–SiO2-T remained 96%. Besides, the extraction efficiency of uranium on Al2O3–SiO2-T was 72.5% in simulated seawater, which suggested that the Al2O3–SiO2-T was expected to be used for uranium extraction from seawater. Further, the interaction mechanism between Al2O3–SiO2-T and uranium species was studied. The results showed that the electrostatic interaction and complexation played key roles in the adsorption process of Al2O3–SiO2-T to uranium.
Synthesis of stabilizer-free, homogeneous gold nanoparticles by cold atmospheric-pressure plasma jet and their optical sensing property
Authors: Xuan Le Thi Quynh , Nguyen Linh Nhat , Dao Nguyen Thuan 
Published: November 2021

Abstract
Recently, cold atmospheric-pressure plasma has been studied extensively as an efficient and green method to synthesize gold nanoparticles (AuNPs). Although the characteristics of the AuNPs, especially their homogeneousness, depend very much on the plasma synthesis parameters, there is a lack of a study involving these parameters systematically. Moreover, most of AuNPs-cold-plasma synthesis reports so far either required organic capping agents or resulted in highly non-uniform AuNPs. In this work, we systematically study the effect of most important synthesis parameters— including distance from the plasma jet to the solution, gas flow rate, plasma frequency, volume and concentration of the precursor, plasma interaction time as well as the effect of the synthesis environment (humidity and temperature)—on the uniformity of the AuNPs. Through various characterization measurements, we show that homogeneous and highly stable intrinsic AuNPs with an average size of 45 nm can be obtained with optimized synthesis parameters and in the absence of a stabilizer. The synthesized AuNPs yield advanced optical sensing properties in comparison with commercial AuNPs and can be further applied in developing versatile and high-sensitivity biosensors.
QCD at finite chemical potential in and out-of equilibrium
Authors: Soloveva Olga , Moreau Pierre , Bratkovskaya Elena 
Published: November 2021

Abstract
We review the transport properties of the strongly interacting quark-gluon plasma (QGP) created in heavy-ion collisions at ultrarelativistic energies, i.e. out-of equilibrium, and compare them to the equilibrium properties. The description of the strongly interacting (non-perturbative) QGP in equilibrium is based on the effective propagators and couplings from the Dynamical QuasiParticle Model (DQPM) that is matched to reproduce the equation-of-state of the partonic system above the deconfinement temperature T

c
from lattice QCD. We study the transport coefficients such as the ratio of shear viscosity and bulk viscosity over entropy density, diffusion coefficients, electric conductivity etc versus temperature T and baryon chemical potential μ

B
. Based on a microscopic transport description of heavy-ion collisions we, furthermore, discuss which observables are sensitive to the QGP formation and its properties.
Long-range robust multifilament arrays from terawatt femtosecond beam
Authors: Mitina E , Uryupina D , Zhidovtsev N , Volkov R , Kosareva O , Savel’ev A 
Published: November 2021

Abstract
Multiple filament’s formation on a long atmospheric path was studied for an amplitude modulation of the terawatt femtosecond beam with the four and six hole masks. Filaments appeared at the distance that is determined by the Fresnel lens formed by a hole, not by the self focusing theory for the unrestricted (Gaussian like) beam. This lens focuses 1/3 of the energy passing through the hole to the beam spot ≈1 mm in diameter. The robust multifilament array 10–15 m in length was observed if the energy per hole was ≈1-1.5 mJ (pulse duration 50 fs), while each hole produces bundle of a few filaments at higher energies.
A Study of Possible Reasons of the Damage by Electric Current of Traction Induction Motors Bearings of Electric Trains Lastochka and the Ways to Prevent This
Authors: Pustovetov M 
Published: November 2021

Abstract
There is a problem of damage of bearings of traction induction motors of electric trains Lastochka by electric current. Based on the fact that the bearings have a ceramic insulation coating, and the cases of its electrical breakdown is not fixed, the authors put forward a version that a high-frequency current flows through the bearing as through an electric capacitance. The analysis show that the cause of the current can be a radio standard GSM-R. The proposed technical solution against the damage of bearings: the use of grounding shaft rings, replace the bearings on the other with ceramic rolling elements, arrangement of separate high-frequency grounding for the GSM-R antenna.
On the Approach to Optimization of Restoration Works at Railway Facilities
Authors: Dergachev A I , Dergachev S A , Chernykh A K , Abu-Khasan M S 
Published: November 2021

Abstract
The article considers an approach to solving the problem of finding the optimal option for the work teams to carry out a complex of restoration works at railway facilities destroyed as a result of an emergency. An approach to solving this problem is proposed, based on the methods of graph theory, fuzzy set theory, and mathematical programming. The proposed approach is illustrated by a meaningful example.
Control System of a Robotic Irrigation Machine Based on the Mamdani Fuzzy Algorithm
Authors: Kafiev I , Romanov P , Romanova I 
Published: November 2021

Abstract
The article analyzes the tasks that can be solved by agricultural robots. The purpose of the study was the robotization of the "Fregat" type crop irrigation machine by the fuzzy control of irrigation technological processes, which allows to control the irrigation rate. It is proposed to use in a robotic irrigation machine the analog valve-setter of the speed of the last cart, powered by electricity. It is recommended to include a diagnostic subsystem in the fuzzy control system of the flow control valve, which includes sensors for measuring the soil moisture and the slope of the irrigation machine in various areas of the field. The mathematical model of fuzzy control of the irrigation machine is developed based on the software control of the water supply depending on the terrain of the field, the speed of irrigation machine and soil moisture to reduce water consumption and improve the efficiency and quality of irrigation. The Mamdani algorithm, which is implemented in the MATLAB package, is proposed as a fuzzy inference system. The formalization of the description of the indicators of the irrigation machine is carried out by specifying linguistic variables. The proposed mathematical model can be used in the design of control systems for other robotic agricultural machines.
Estimation of Probability Distributions of Geoacoustic Signal Characteristics
Authors: Gapeev M I , Senkevich Yu I , Lukovenkova O O 
Published: November 2021

Abstract
The paper presents an estimation of probability distributions of geoacoustic signal characteristics. The studied signals have a pulsed nature. The ones have been recording at the geodynamic test site of the IKIR FEB RAS (Kamchatka Peninsula) for more than 20 years. To estimate the distribution of characteristics, such time intervals were determined in which histograms of the distribution did not change. The following characteristics were chosen for the estimation: maximum amplitude, the position of pulse envelope maximum, duration, filling frequency, and pulse-to-pulse interval. The obtained estimates made it possible to develop an empirical model of the geoacoustic emission signal. The model can help to test new and existing algorithms for the processing and analysis of geoacoustic signals. The paper also shows that the formalization of the selected characteristics makes it possible to search for anomalies, including those associated with seismic events, by the characteristic variations.
Investigation Adsorption Process Energy Capacity Reducing Possibility by Composite Adsorbents Implement
Authors: Ripol-Saragosi T , Ripol-Saragosi L 
Published: November 2021

Abstract
The research results presented in the article are devoted to the compressed air adsorption drying processes energy intensity reducing possibilities study. The investigation concerns the new adsorbent – composite. The material is considered as one of the most perspective at the present time. It’s ehergy efficiency is proved comparing traditional adsorbents such as silica gel, alumogel, zeolites, etc. The authors consider the bulk density as one of the factors at the adsorption process energy efficiency increase. The formulas given at the articles allow to calculate the different adsorbents bulk and apparent density, the compressor’s energy efficiency by using different adsorbents at pneumatic schemes, etc.
Development of an Algorithm for Carrying Out Geophysical and Geological Works Using Automated Systems and GIS Technologies
Authors: Dadykin V S , Podobay N V , Elyakova I D , Fedorova E Y 
Published: November 2021

Abstract
During the whole period of existing a modern geological industry, the issues of its computerization have been a priority, both in terms of providing employees of enterprises and organizations with computer equipment, and in terms of arranging information exchange and telecommunications between interacting information agents. It should be noted that there is a correlation between the increasing complexity of mining projects and the need to provide work with more and more developed software and hardware, information technologies, increasing complexity and growing number of software systems used to solve geological problems. The list of enterprises with positive experience in the development and operation of systems and complexes used in geology, geophysics and for subsurface use is also expanding very effectively. We propose the development of an algorithm for conducting geophysical and geological works using automated systems and GIS technologies, aimed at ensuring the rational development of the mineral resource potential of the region and ensuring the stage-by-stage nature of the geological exploration process. The testing was carried out using software product Diafond, which is available at the Russian Federal Geological Fund. This work was financially supported by the grant of the President of the Russian Federation No. MD- 2409.2020.5.
Modeling Conflicts Resulting from Sharing Telecommunication Resource between Antagonistic Control Systems
Authors: Fedorov V Kh , Balenko E G , Starodubtsev Yu I , Vershennik E V 
Published: November 2021

Abstract
Today state-of-the-art communication systems, whilst being limited in resources, use a shared information and telecommunication network to provide integrated communication services; the resources of such a network are split between various control systems, some of which may conflict, resulting in a variety of malware attacks. This paper dwells upon a method for modeling conflicts resulting from sharing a telecommunication resource between antagonistic control systems; the method takes into account the use of such a shared resource (ITCN) and the following processes: data processing by cyber threat intelligence systems, and making decisions on executing MAs upon the elements of conflicting control systems; for each moment of simulation time, the method calculates the current potential of each conflicting system in order to find the average potential degradation time.
Development of the Lower Extremity Exoskeleton Dynamics Model Using in the Task of the Patient Verticalization
Authors: Saypulaev M R , Zuev Yu Yu , Saypulaev G R 
Published: November 2021

Abstract
The object of the study is an exoskeleton of the lower extremities with a rigid structure of the power frame, which has 7 degrees of freedom. The movement of the exoskeleton in the sagittal plane is considered with the assumption of symmetrical movement of the right and left legs. The aim of the study is to develop a mathematical model of the dynamics of the exoskeleton, taking into account the forces of viscous friction in the joints. The equations of motion are obtained under the condition that there is no slippage of the points of contact with the supporting surface. Based on the results of numerical simulation, the control moments were obtained, which must be created by the drives to provide program movement.
Improving the Reliability of the Information and Measurement System of Aviation Surveillance
Authors: Eliseev A V 
Published: November 2021

Abstract
It is shown that various sensors are used to ensure air traffic control in civil aviation, namely: primary and secondary radars, multilateration surveillance systems, automatic dependent surveillance systems of broadcast and contract types, multistatic radars. Based on the analysis of the main disadvantages of the considered systems, it was concluded that the use of multilateration aircraft surveillance systems (MLAT) is promising. The need to improve the reliability of MLAT is noted. The work proposes a method of structural and informational redundancy of MLAT based on the introduction of an additional receiver into its design. It allows to measure the distance to the aircraft using the energy method. The analysis of increasing the reliability of MLAT at various redundancy rates is carried out.
Using of Beylkin Wavelet for Speech Recognition
Authors: Leontiev N A 
Published: November 2021

Abstract
This paper describes the application of the Beylkin wavelet for speech segmentation. The problem of speech segmentation in the Yakut language is that there are segmentation difficulties due to the peculiarities of the language. The use of long vowels and double consonants in the Yakut language complicates the correct segmentation of oral speech. For the analysis, the window method of analyzing the energy of the wavelet signal is used. The experience of using different wavelet functions has shown that it is not always possible to accurately find the segment boundaries in some cases. The Scilab package has a large library of wavelets that allows extensive research into their applications in speech recognition. The results of the study show that there are difficulties due to various reasons, one of which is the presence of double sonorant consonants. The graphs of the analysis of doubled sonorant consonants are given.
Dependence of the Piezoelectric Micropump Operating Mode on Its Geometry
Authors: Nasibullayev I Sh , Nasibullaeva E Sh , Darintsev O V 
Published: November 2021

Abstract
A mathematical and computer axisymmetric models in which periodic oscillations of ring piezoelectric actuators placed on an elastic tube of circular cross-section leads to radial deformations of the tube is constructed. The result of these displacements is a local compression of the microchannel, which leads to changes in its volume and the corresponding pushing of the fluid. If a non-symmetrical oscillation scheme is used, the average fluid flow over the period will be non-zero and the device can be used as a micropump. The aim of the work is a computer study of the geometric features of an axisymmetric piezoelectric micropump, taking into account the processes of heat transfer by a fluid in the channel. The dependence of the average fluid flow rate on the channel parameters and the frequency of oscillations of the piezoelectric actuators is determined by the method of factorial experiment. The parameters preventing heat backflow have been determinate, which makes it possible to use a device for supplying coolant to a microgripper cooling system.
Method for Solving the Problem of Heat Transfer in a Flat Channel
Authors: Eremin A V , Gubareva K V 
Published: November 2021

Abstract
In power engineering, studies related to the distribution of temperatures and velocities in fluids that move, for example, in pipelines or channels, are of theoretical and practical importance. The presented work displays the results of the development of an approximate analytical method for mathematical modeling of the process of heat transfer in laminar flows. By the example of solving the problem of heat transfer in a flat channel with a Couette flow, the main provisions of the method are considered. The combined use of the integral heat balance method and the collocation method made it possible to obtain an analytical solution that is simple in form. The obtained accuracy of solutions depends on the number N of points of the spatial variable at which the original differential equation is exactly satisfied.
Implementation of Power Plants Based on Renewable Energy Sources in the Primorsky Krai
Authors: Chernyavsky A A , Ivanin O A , Shevchenko A L , Zaichenko V M 
Published: November 2021

Abstract
The results of calculations presented in the article show the effectiveness of the transition from diesel power plants using imported fuel to installations using renewable energy sources – solar cells and wind generators. Studies have shown that for Primorsky Krai such a transition is justified, despite significant capital costs, and the payback period for new power plants based on renewable energy sources is about 8 years.
Mathematical Model of Micropolar Lubricant Considering Viscosity-Pressure Dependence
Authors: Morozova A V , Zadorozhnaya N S , Mukutadze M A , Kirishchieva V I 
Published: November 2021

Abstract
In the study, based on the micropolar fluid flow equation for a “thin layer”, the continuity equation, the equation describing the profile of the molten contour of the guide coated with a low-melting metal alloy, and the equation for the mechanical energy dissipation rate, asymptotic and exact self-similar solution has been found for the zero (without considering the melting) and first (considering the melting) approximation of wedge-shaped support with the slider support profile adapted to the friction conditions and the low-melting metal coating of the guide surface. The research has taken into account the pressure dependence of the lubricant rheological properties and the melt having micropolar properties in the laminar flow regime. Analytical dependencies have been obtained for the molten surface profile of the low-melting metal coating of the guide and the field of velocities and pressure for the zero and first approximations. Also, the basic performance characteristics of the friction pair under consideration have been determined: the bearing capacity and the friction force. The impact of parameters determined by the coating melt, adapted to the support profile friction conditions, and the parameter characterizing the pressure dependence of the lubricant viscosity on the bearing capacity and friction force has been estimated.