European Physical Journal-applied Physics最新文献_第2页

Sustained coherent epitaxy and role of oxygen vacancies in La0.7Sr0.3MnO3−δ thin films grown on SrTiO3 by sputtering 溅射生长在SrTiO3上的La0.7Sr0.3MnO3−δ薄膜的持续相干外延及氧空位的作用

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2021-06-01 DOI: 10.1051/EPJAP/2021200365

M. Lmouchter, M. Suzuki

引用次数: 1

Fabrication and repair of GaN nanorods by plasma etching with self-assembled nickel nanomasks 自组装镍纳米掩膜等离子体刻蚀制备和修复GaN纳米棒

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2021-03-01 DOI: 10.1051/EPJAP/2021210002

Shiying Zhang, Lei Zhang, Yueyao Zhong, Guodong Wang, Qingjun Xu

{"title":"Fabrication and repair of GaN nanorods by plasma etching with self-assembled nickel nanomasks","authors":"Shiying Zhang, Lei Zhang, Yueyao Zhong, Guodong Wang, Qingjun Xu","doi":"10.1051/EPJAP/2021210002","DOIUrl":"https://doi.org/10.1051/EPJAP/2021210002","url":null,"abstract":"High crystal quality GaN nanorod arrays were fabricated by inductively coupled plasma (ICP) etching using self-organized nickel (Ni) nano-islands mask on GaN film and subsequent repaired process including annealing in ammonia and KOH etching. The Ni nano-islands have been formed by rapid thermal annealing, whose density, shape, and dimensions were regulated by annealing temperature and Ni layer thickness. The structural and optical properties of the nanorods obtained from GaN epitaxial layers were comparatively studied by high-resolution X-ray diffraction (HRXRD), Raman spectroscopy and photoluminescence (PL). The results indicate that damage induced by plasma can be successfully healed by annealing in NH3 at 900 °C. The average diameter of the as-etched nanorod was effectively reduced and the plasma etch damage was removed after a wet treatment process in a KOH solution. It was found that the diameter of the GaN nanorod was continuously reduced and the PL intensity first increased, then reduced and finally increased as the KOH etching time sequentially increased.","PeriodicalId":12228,"journal":{"name":"European Physical Journal-applied Physics","volume":"209 1","pages":"30405"},"PeriodicalIF":1.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77284922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of Ca and/or Mn substitution on thermoelectric properties of SrTiO3 Ca和/或Mn取代对SrTiO3热电性能的影响

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2021-03-01 DOI: 10.1051/EPJAP/2021200297

D. M. Radheep

引用次数: 1

Fast response acetone-sensing properties of SnO2 nanoparticles prepared by the sol-gel method 溶胶-凝胶法制备SnO2纳米颗粒的快速响应丙酮传感性能

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2021-03-01 DOI: 10.1051/EPJAP/2021200361

Jiaxing Wang, Haijing Yu, Yong Zhang

引用次数: 0

Enhanced photoelectrochemical performance of TiO2 nanofiber arrays decorated with CdS nanoparticles via SILAR method 利用SILAR方法增强CdS纳米粒子修饰TiO2纳米纤维阵列的光电化学性能

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2021-02-01 DOI: 10.1051/EPJAP/2021200249

J. Naceur, R. Ouertani, F. Jrad, S. Khamlich, W. Dimassi, R. Chtourou

引用次数: 0

A neural network approach for improved bearing prognostics of wind turbine generators 一种改进风力发电机轴承预测的神经网络方法

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2021-02-01 DOI: 10.1051/EPJAP/2021200259

Sharaf Eddine Kramti, Jaouher Ben Ali, L. Saidi, M. Sayadi, M. Bouchouicha, Eric Bechhoefer

{"title":"A neural network approach for improved bearing prognostics of wind turbine generators","authors":"Sharaf Eddine Kramti, Jaouher Ben Ali, L. Saidi, M. Sayadi, M. Bouchouicha, Eric Bechhoefer","doi":"10.1051/EPJAP/2021200259","DOIUrl":"https://doi.org/10.1051/EPJAP/2021200259","url":null,"abstract":"Condition monitoring of High-Speed Shaft Bearing (HSSB) in Wind Turbine Generators (WTGs) remains a challenging subject for industrial and academic studies. The investigation of mechanical vibration signals presents the most popular method in the literature. Consequently, this work involves a novel data-driven approach for direct HSSB prognosis using the vibration analysis. The proposed method is based on the computation of traditional statistical metrics derived both from the time-domain and frequency-domain via Spectral Kurtosis (SK). Then, the selection of the most suitable features was made using three metrics (monotonicity, trendability, prognosablity) to guarantee a better generalization of the trained Elman Neural Network (ENN). The validation of the proposed method was done using the benchmark of the center for Intelligent Maintenance Systems (IMS) for training and real measured Green Power Monitoring Systems (GPMS) data for testing. We have provided two links for downloading these data sets. The experimental results show that the proposed approach presents a powerful prediction tool. Comparative results with previous work show several advantages for the proposed combination of statistical metrics and ENN, such as the external prediction and real online estimation of the Remaining Useful Life (RUL). Also, some new practical findings are provided in the discussion.","PeriodicalId":12228,"journal":{"name":"European Physical Journal-applied Physics","volume":"21 1","pages":"20901"},"PeriodicalIF":1.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75008958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Effect of cavity parameters on the propagation of shock wave generated by underwater pulsed discharge 腔体参数对水下脉冲放电冲击波传播的影响

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2021-02-01 DOI: 10.1051/epjap/2021200325

Jin Yang, Zhenghao He, Zhuoyu Zhang, Yuchen Liu, Ming Yin

{"title":"Effect of cavity parameters on the propagation of shock wave generated by underwater pulsed discharge","authors":"Jin Yang, Zhenghao He, Zhuoyu Zhang, Yuchen Liu, Ming Yin","doi":"10.1051/epjap/2021200325","DOIUrl":"https://doi.org/10.1051/epjap/2021200325","url":null,"abstract":"In order to optimize the shock wave generated by underwater pulsed discharge, the relationship between cavity parameters and shock wave propagation is further studied by three-dimensional numerical simulation. According to the sound pressure field distribution obtained by the simulation, the reflection of the shock wave by the reactor wall can be clearly observed. The reflected pressure wave will reach its maximum value and then gradually attenuate. The study also found that when the deposition energy is constant, when the initial radius of the arc channel increases from 0.1 mm to 2.5 mm, the maximum amplitude of the shock wave will increase from 0.22 × 105 Pa to 1.70 × 105 Pa. When the initial radius of the arc channel is constant, as the deposition energy increases, the time to radiate the shock wave becomes earlier, and the maximum amplitude of the shock wave will increase. This means that a higher pressure can be generated by increasing the input of the deposition energy. When the deposition energy is constant, a higher-pressure level can be obtained by increasing the initial radius of the channel. The excitation frequency also affects the shock wave amplitude. Higher excitation frequency can obtain higher pressure amplitude. These methods will increase the efficiency of underwater pulse discharge treatment of bacteria.","PeriodicalId":12228,"journal":{"name":"European Physical Journal-applied Physics","volume":"1 1","pages":"20801"},"PeriodicalIF":1.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86921522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of two complementary ambipolar organic thin film transistors: application to organic inverter 两个互补双极性有机薄膜晶体管的建模:在有机逆变器中的应用

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-12-16 DOI: 10.1051/epjap/2020200320

Houaida Becharguia, M. Mahdouani, R. Bourguiga

引用次数: 1

Improving the interfacial properties of para aramid fibers by surface treatment via plasma jet method in atmospheric pressure 常压等离子体喷射表面处理改善对芳纶纤维的界面性能

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-12-08 DOI: 10.1051/epjap/2020200277

Mojtaba Sarafpour, I. Ebrahimi, Nadia Rahimi Tanha

{"title":"Improving the interfacial properties of para aramid fibers by surface treatment via plasma jet method in atmospheric pressure","authors":"Mojtaba Sarafpour, I. Ebrahimi, Nadia Rahimi Tanha","doi":"10.1051/epjap/2020200277","DOIUrl":"https://doi.org/10.1051/epjap/2020200277","url":null,"abstract":"Various methods have been used by the researchers in order to improve the interfacial adhesion of para aramid fibers. In the present research, poly para-phenylene terephthalamide (PPTA) fibers were treated by an innovative method through the utilization of plasma jet in atmospheric pressure using a mixture of oxygen and argon as inlet gases. The effect of the volume ratio of O2/Ar and the treatment time were investigated on the interfacial properties of the fibers via SEM, AFM, ATR-FTIR analyses, and moisture sorption as well as the mechanical tests. SEM images demonstrated significant effect on the surface morphology of the fibers. In addition, ATR-FTIR spectra resulted in the creation of COOH, NH2, and OH groups on the surface of fibers. The increase in the surface functionality led to an improvement in the surface adhesion of the fibers, as observed from the pull-out tests (a maximum of 31% improvement) and moisture sorption tests (a maximum of 54% improvement). According to the results of the tensile and pull-out tests via the design expert software, the optimum condition predicted that using atmospheric pressure plasma jet employing O2/Ar volume ratio of 45.54/54.46% for 20 min results the best adhesion between the fibers and resin.","PeriodicalId":12228,"journal":{"name":"European Physical Journal-applied Physics","volume":"68 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75640419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Critical behavior of Pr0.65Sr0.35MnO3 compound investigated by a Monte Carlo Simulation Pr0.65Sr0.35MnO3化合物的临界行为Monte Carlo模拟研究

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-12-08 DOI: 10.1051/epjap/2020200315

L. Omari, A. Lekdadri, R. Chami, E. Hlil

{"title":"Critical behavior of Pr0.65Sr0.35MnO3 compound investigated by a Monte Carlo Simulation","authors":"L. Omari, A. Lekdadri, R. Chami, E. Hlil","doi":"10.1051/epjap/2020200315","DOIUrl":"https://doi.org/10.1051/epjap/2020200315","url":null,"abstract":"The critical behavior and magnetic properties of Pr0.65Sr0.35MnO3 (symbolized here by PSMO) were studied using Monte Carlo Simulation (MCS). The thermal bath algorithm and Ising model in which exchange interactions via the third nearest neighbor were used to calculate the magnetic and magneto-caloric properties. The effects of temperature (T) and external magnetic field (h) on the magnetic behavior of PSMO were examined. The results show that the Curie temperature (TC) is close to the experimental value. The magnetic entropy shows a maximum value around the TC that increases linearly with the increase of the external field. The critical behavior of the PSMO compound was studied by analyzing the magnetization isotherms and by exploiting Arrott plots. The obtained values of the critical exponents are β = 0.336, γ = 1.121, and δ = 4.335. These values are very close to those reported for the 3D-Ising model. The variation of maximum magnetic entropy (ΔSmmax) and relative cooling power (RCP) around the Curie temperature were calculated; the obtained values of ΔSmmax and those of RCP ranging from 3.612 and 92.7 for 1T to 6.191 and 209.9 for 5T, respectively. These results are sufficiently interesting to consider the PSMO compound as a promising candidate for magnetic refrigeration.","PeriodicalId":12228,"journal":{"name":"European Physical Journal-applied Physics","volume":"11 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78690670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1