Bulletin of the University of Karaganda-Physics最新文献_第8页

The study of carbon nanomaterials by IR-Fourier spectroscopy, obtained by the action of an ultrasonic field on graphite 碳纳米材料的红外傅立叶光谱研究，是通过超声波场作用于石墨而获得的

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph2/127-132

B. Baitimbetova, K.S. Tolubayev, Y. Ryabikin, D. Murzalinov, B. Zhautikov, G.S. Dairbekova

{"title":"The study of carbon nanomaterials by IR-Fourier spectroscopy, obtained by the action of an ultrasonic field on graphite","authors":"B. Baitimbetova, K.S. Tolubayev, Y. Ryabikin, D. Murzalinov, B. Zhautikov, G.S. Dairbekova","doi":"10.31489/2022ph2/127-132","DOIUrl":"https://doi.org/10.31489/2022ph2/127-132","url":null,"abstract":"In this work, the absorption lines corresponding to nanomaterials (nanotubes, nanofibers, graphene), as well as vibrational spectra in the studied samples of graphene structures obtained by processing an ultrasonic field on an aromatic hydrocarbon and pure graphite, are studied by IR-Fourier spectroscopy. With an increase in time in the studied spectra of ultrasonic treatment on pure graphite, absorption bands are observed in the frequency range of ν= 2967,7 cm-1, 2926,1 cm-1, 2853 cm-1, 1449 cm-1, related to stretching and deformation vibrations of the bond C-H of saturated aromatic hydrocarbons. The spectra of carbonyl (carbon) compounds of the C-C bond are also noted in the regions of the absorption bands: 1449,9 cm-1÷1652,6 cm-1. This means that in the IR spectra, with an increase in the time of sonication, the carbon formations of asymmetric stretching vibrations of C-C bonds increase. In these frequency ranges, the absorption bands corresponding to adsorbed benzene are not observed. With an increase in the processing time of the samples, the absorption band of OH hydroxyl groups is not observed. In the samples under study, numerous aromatic carbon-carbon bonds are observed, due to the collective groups of vibrations of carbon nanomaterials (graphene structures, nanofibers, single-layer and multilayer carbon nanotubes, etc.).","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42585585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phase transformations during the doping of zinc chloride and silver nitrate into calcium phosphates 氯化锌和硝酸银掺杂磷酸钙过程中的相变

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph2/18-23

A. Sagidugumar, A. Turlybekuly, D. Dogadkin, A. Sadibekov, A. Pogrebnjak, N. Kantay

{"title":"Phase transformations during the doping of zinc chloride and silver nitrate into calcium phosphates","authors":"A. Sagidugumar, A. Turlybekuly, D. Dogadkin, A. Sadibekov, A. Pogrebnjak, N. Kantay","doi":"10.31489/2022ph2/18-23","DOIUrl":"https://doi.org/10.31489/2022ph2/18-23","url":null,"abstract":"This article shows the results of a study on a biocomposite material based on calcium phosphate doped with ZnCl and AgNO3 . Calcium phosphates are mainly used in dentistry and orthopedics due to their excellent biocompatibility, osteoconductive properties and similarity to the inorganic components of human bone. The main objective of the study is to investigate the morphology, elemental and phase composition, and physicochemical properties of the obtained material. The test material is obtained in the form of a suspension and subjected to ultrasonic treatment. The microstructure and phase composition of the obtained biocomposites are studied by SEM, XRD, FTIR methods. It is possible to obtain dicalcium phosphate dihydrate (DCPD) by the presented methods, and the results demonstrate a partial replacement of calcium atoms by zinc atoms. Xray phase analysis shows that Ca(HPO4 ) (H2O)2 phases as well as CaZn2 (PO4 )2 (H2O)2 and AgCl phases were formed during the reaction. Fourier transform infrared spectroscopy revealed that the obtained samples contain the groups HPO4 2 and PO4 3 , with the group PO4 2 replacing the group CO3 2 . The biocomposite materials could be of great interest in the biomedical field, including the development of coatings that prevent or delay the development of bacterial biofilm.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44097598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical research of characteristic mixing times of isothermal three-component steam-gas systems 等温三组分蒸汽-气体系统特征混合次数的数值研究

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph1/133-140

A. Zhussanbayeva, V. Mukamedenkyzy, V. Kossov, A. Akzholova

{"title":"Numerical research of characteristic mixing times of isothermal three-component steam-gas systems","authors":"A. Zhussanbayeva, V. Mukamedenkyzy, V. Kossov, A. Akzholova","doi":"10.31489/2022ph1/133-140","DOIUrl":"https://doi.org/10.31489/2022ph1/133-140","url":null,"abstract":"Multicomponent diffusion in gases is characterized by a number of effects that are not observed in binary diffusion. Analysis of existing works shows that convective instability may occur in some systems with significantly different diffusion coefficients with certain geometric and thermophysical characteristics. Stability analysis allows determining the spectrum of parameters at which a transition from a diffusive state to a convective is possible. However, this approach does not allow the researchers to investigate the dynamics of the process. Therefore, this work aims to describe emergence and evolution of convective flows in threecomponent systems and assess the influence of the initial composition on the occurrence of concentration gravitational convection. The main part of the work presents a mathematical model describing the occurrence of convective flows based on the splitting scheme according to physical parameters. Numerical data on the concentration fields of the gas with the highest molecular weight at various time points is obtained. It is established that curvature of the isoconcentration lines of the diffusing components can be associated with instability of the mechanical equilibrium of the system. Degree of curvature is determined by the initial concentration of components of the mixture. The obtained data can be used to determine the main characteristics of mass transfer used in calculations related to combined heat and mass transfer in a wide range of thermophysical parameters.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42117648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The use of a two-frequency eddy current method for measuring the electrically conductive wall thickness under significant variations in the test parameter and the lift-off 使用双频涡电流法在试验参数和剥离显著变化的情况下测量导电壁厚

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph2/24-31

A.E. Goldshteyn, Kh.Kh. Abakumov

{"title":"The use of a two-frequency eddy current method for measuring the electrically conductive wall thickness under significant variations in the test parameter and the lift-off","authors":"A.E. Goldshteyn, Kh.Kh. Abakumov","doi":"10.31489/2022ph2/24-31","DOIUrl":"https://doi.org/10.31489/2022ph2/24-31","url":null,"abstract":"The paper addresses the problem of eddy current testing of the wall thickness of light-alloy drill pipes under significant variations in both the test and the influence parameter of the test object – the lift-off between the eddy current probe and the test object surface. The performance of the two-frequency eddy current method is shown through the use of the signal of the surface eddy current probe of the added high-frequency voltage amplitude as an informative parameter to measure the lift-off and the phase of the added low-frequency voltage. Experimentally obtained dependences of the informative parameters on test and influence parameters are presented. The phase and amplitude-phase multi-parameter methods used to suppress the effect of stray parameters in eddy current testing are analyzed; the effectiveness of their application under significant variations in test and other influence parameters of the test object is shown to be limited. The effectiveness of nonlinear functions for the inverse transformation of the informative parameter into the test parameter to suppress the lift-off effect on test results is estimated. Criteria of choice for informative parameters of the eddy current probe signal are considered. The measurement error caused by the approximation error of the nonlinear functions of the inverse transformation of the informative parameters into the test parameter within the variation ranges of the test and influence parameters is estimated","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44681738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of the size of iron nanoclusters on their magnetization 铁纳米团簇尺寸对其磁化强度的影响

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph2/68-74

L. Kveglis, F. M. Noskov, A. Kalitova, R. T. Nasibullin, A. Nyavro, A. Cherepanov, A. E. Olekhnovich, D. N. Saprykin

{"title":"Influence of the size of iron nanoclusters on their magnetization","authors":"L. Kveglis, F. M. Noskov, A. Kalitova, R. T. Nasibullin, A. Nyavro, A. Cherepanov, A. E. Olekhnovich, D. N. Saprykin","doi":"10.31489/2022ph2/68-74","DOIUrl":"https://doi.org/10.31489/2022ph2/68-74","url":null,"abstract":"The size of iron nanocrystals significantly affects the value of their magnetization. However, an adequate model of the structure of nanocrystalline formations comprising different numbers of iron atoms still does not exist. In this work, spatial models of nanocrystalline iron clusters differing in configuration and the number of their constituent atoms are constructed. Tetrahedrally close-packed cluster assemblies of iron atoms are taken as the basis for the proposed structures of nanocrystals. The spectra of the density of electronic states for the proposed clusters are constructed using the theory of the electron density functional. The calculation was carried out by the method of scattered waves in accordance with the band theory of crystals. The appearance of magnetization in tetrahedral close-packed cluster formations is associated with excited electronic states of atoms located on the surface of the nanocluster. Excited atoms have an increased electron density, that is, electrons are able to transition to states with higher energy, approaching the Fermi energy. In this case, the Stoner criterion necessary for the occurrence of magnetization is fulfilled. The configurations of electrons with spin up and down differ, which is why uncompensated magnetic moments appear. It is shown that the proposed models of iron nanoclusters are in satisfactory agreement with the known experimental data.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46306357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calcium phosphate coating formed on titanium scaffold by plasma electrolytic oxidation 等离子体电解氧化在钛支架上形成磷酸钙涂层

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph1/32-36

A. Sagidugumar, D. Dogadkin, B. Azamatov, S. O. Rudenko, A. Turlybekuly

{"title":"Calcium phosphate coating formed on titanium scaffold by plasma electrolytic oxidation","authors":"A. Sagidugumar, D. Dogadkin, B. Azamatov, S. O. Rudenko, A. Turlybekuly","doi":"10.31489/2022ph1/32-36","DOIUrl":"https://doi.org/10.31489/2022ph1/32-36","url":null,"abstract":"The article provides the results of the preparation of calcium phosphate coatings by plasma electrolytic oxidation. Calcium phosphate coatings are formed on titanium scaffolds with a porous structure. Titanium scaffolds are products of additive manufacturing equipment by selective laser melting. The morphology of the obtained coating, phase and elemental composition are described, the Ca/P ratio of the coating is dete rmined. The surface of the scaffold is porous due to the baking of powder particles during production. XRD analysis shows the presence of calcium phosphate and oxide compounds. The resulting oxide coating is evenly distributed over the porous surface of the scaffold. Titanium, aluminum and vanadium are located in the areas of the coating free of calcium phosphate particles. The average Ca/P ratio for the resulting coating was 2.48. This value is close to the Ca/P ratio in human bone. It is concluded that the use of the PEO method is promising for the manufacture of scaffolds with a porous structure with calcium phosphate coatings for use in traumatology and orthopedics. The use of titanium scaffolds with a porous structure with calcium phosphate coatings will improve the osseointegration of implants and exclude the possibility of implant failure.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47157369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Studies of Mechanical-Electrical Transformations during the Destructive Processes Developing in Dielectric Materials 介电材料破坏过程中机电转换的实验研究

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph1/58-67

A. Bespal’ko, G. E. Utsyn, P. Fedotov

{"title":"Experimental Studies of Mechanical-Electrical Transformations during the Destructive Processes Developing in Dielectric Materials","authors":"A. Bespal’ko, G. E. Utsyn, P. Fedotov","doi":"10.31489/2022ph1/58-67","DOIUrl":"https://doi.org/10.31489/2022ph1/58-67","url":null,"abstract":"A mechanical-electrical method for testing fractures developing within the stress-strain state changes of dielectric rock samples, as an example, is discussed here. The paper discusses the results of numerical and experimental studies of changes in the electromagnetic responses parameters under the pulse deterministic acoustic excitation of rock samples with different composition and texture. The paper presents the results of mathematical calculations of the stress concentration on cracks located along and across the sample axis, perpendicular to which deterministic acoustic pulses were introduced. The cracks presented in the sample volume are stress concentrators. With a different number and sizes of cracks perpendicular to the propagation of an acoustic pulse, the intensity of stresses and their type differ significantly. This circumstance indicates the influence of the structure of the samples and their dielectric properties on the parameters of electromagnetic signals when recording the results of mechanical and electrical transformations. Thus, the use of the method of mechanical-electrical transformations under compression can be used in testing the processes of the onset of crack formation and the development of fracture in solid-state dielectric materials and products.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45741647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pore-scale modelling of fluid flow in porous media using the projection method for incompressible Navier-Stokes equations in irregular domains 不规则区域不可压缩Navier-Stokes方程的投影法在多孔介质中流体流动的孔隙尺度模拟

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/35-42

Zhibek Akasheva, A. Kudaikulov, B. Assilbekov, D. Bolysbek

{"title":"Pore-scale modelling of fluid flow in porous media using the projection method for incompressible Navier-Stokes equations in irregular domains","authors":"Zhibek Akasheva, A. Kudaikulov, B. Assilbekov, D. Bolysbek","doi":"10.31489/2022ph1/35-42","DOIUrl":"https://doi.org/10.31489/2022ph1/35-42","url":null,"abstract":"This paper presents the results of numerical simulation of incompressible viscous flow in porous media, which comprise periodically arranged cylinders. This simulation is based on the numerical solution of the incompressible Navier-Stokes equations in irregular domains using the projection method on staggered grids, where the irregular boundary is represented by its level-set function at the pore-scale level. The main problem in numerical calculation of fluid flow through porous media occurs when the value of the porosity is close to 1 or is close to the threshold value since it is necessary to take a very fine numerical mesh, which requires additional computing power and increases the calculation time. There are exact analytical solutions for simple types of porous media which consist of periodically arranged cylinders. In this paper, the permeabilities of these porous media were numerically calculated and compared with the previous works based on the numerical solution of the Lattice-Boltzmann equation in irregular domains, when the fluid flow obeys Darcy’s law. The comparison of numerical and theoretical values of porosity shows that this method is sufficiently accurate for porosity values φ=0.2–0.8.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44366897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of aerodynamic parameters of the sail blade 风帆叶片气动参数研究

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/58-65

A. Tleubergenova, N. Tanasheva, K. Shaimerdenova, A. Dyusembaeva, L. Minkov, S.Zh. Uzbergenova

{"title":"Study of aerodynamic parameters of the sail blade","authors":"A. Tleubergenova, N. Tanasheva, K. Shaimerdenova, A. Dyusembaeva, L. Minkov, S.Zh. Uzbergenova","doi":"10.31489/2022ph1/58-65","DOIUrl":"https://doi.org/10.31489/2022ph1/58-65","url":null,"abstract":"This article studies the aerodynamic characteristics of a triangular sail blade of various parameters. For this purpose, we made a triangular sail blade with a dynamically changing surface shape. The airflow velocity varied from 3 to 12 m/s. The dependences of the aerodynamic forces of the sail blade on the flow velocity were investigated at various angles of the apex of the triangular blade. The experiments were carried out at different vertices of the angles: 00 ; 300 ; 600 ; 900 . As a result of the experiment, it was revealed that at the vertex angle γ = 900 , the triangular sail blade has optimal aerodynamic parameters. The dependences of the aerodynamic coefficients on the dimensionless angle of attack are obtained. It is found that the optimal number of triangular blades for a wind power plant with sailing blades is 6. It is established that at the angle of attack α = 00 , the maximum value of the middle section of the wind wheel to the streamlined airflow will introduce a decrease in the value of the drag coefficient with an increase in attack α. The analysis of the experiment results on the change in α from the speed of the airflow of the sail blade is carried out. When the blade position changes, drag changes relatively to the airflow. The wind wheel will change its position relative to the stream with an increase in the attack angle. With an angular position change, the area of the middle section of the wind wheel begins to decrease relative to the incoming flow. With a decrease in the middle section of the wind wheel, the drag force decreases, and the drag coefficient decreases accordingly. Thus, the total result of pressure changes on the leeward and windward surfaces of the sail can be represented as one resultant aerodynamic force directed at an angle to the line perpendicular to the wind direction.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44099431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical band gap energy values in wurtzite InxGa1-xN 纤锌矿InxGa1-xN的光学带隙能值

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/107-116

T. Inerbaev, T. Matsuoka, Y. Kawazoe

{"title":"Optical band gap energy values in wurtzite InxGa1-xN","authors":"T. Inerbaev, T. Matsuoka, Y. Kawazoe","doi":"10.31489/2022ph1/107-116","DOIUrl":"https://doi.org/10.31489/2022ph1/107-116","url":null,"abstract":"The narrow bandgap in InN has been known as a notorious example of local density approximation or generalized gradient approximation (LDA or GGA) calculations to give a metallic state. Various density functional methods are applied to optimize the atomic structures of the systems. These numerical results are used as the input values for the subsequent GW calculations, which can be applied to estimate the band gap value without phenomenological parameters. It is found that LDA with GW0 or the hybrid functional with self-consistent GW0 approximation provides sufficient theoretical results for both of the investigated compounds of GaN and InN. Although they are still time-consuming, due to less computational cost the former method is selected as a trial to compute the electronic structure in the entire range in ternary InxGa1-xN alloys without any arbitrary parameters. The present theoretical studies in ternary InxGa1-xN alloy were carried out by LDA with GW0 . As a result, a good agreement between theoretical and experimental results is obtained, and it is also shown that zone bending could be well-approximated using a quadratic function with a constant, independent of x, parameter equal to 1.85 eV, which is close to the recent experimental results.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69839893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0