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Ground State Energy of 1D Attractive δ-Function Interacting Fermi Gas

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Chinese Physics Letters 2012年第8期29卷 45-47页

作者： WANG ya-hui MA zhong-Qi Department of Physics Shaanxi University of TechnologyHanzhong 723000 Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049

The ground state energy of one-dimensional two-component Fermi gas with the attractive δ-function interaction is fitted with a simple approximate function.

关键词： function Fermi fitted

Spin-1/2 Fermion Gas in One-Dimensional Harmonic Trap with Attractive Delta Function Interaction

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Chinese Physics Letters 2017年第2期34卷 11-14页

作者： ya-hui Wang zhong-Qi Ma School of Physics and Telecommunication Engineering Shaanxi Sci-Tech University Hanzhong 723000 Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049

In terms of the Thomas Fermi method, we solve the ground state energy of the iv-body 1D harmonically trapped spin-l/2 fermion gas with the attractive ^-function interaction in the limit N→∞.

关键词： Delta functions

A method for estimating masses of W Ursae Majoris-type binaries

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Research in Astronomy and Astrophysics 2020年第12期20卷 243-253页

作者： Li-Na Lu Jin-zhong Liu Deng-Kai Jiang ya-hui Wang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Yunnan Observatories Chinese Academy of SciencesKunming 650216China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China Laboratory of New Energy and Materials Xinjiang Institute of EngineeringUrumqi 830091China

Masses of W Ursae Majoris-type(W UMa) binaries play a critical role in investigating stellar dynamical evolutionary status. In this paper, we combine the PARSEC(PAdova and TRieste Stellar Evolution Code) with the Roche geometric model to provide a method to determine the masses of W UMa systems. To verify the validity of this method, we compile a sample of 140 spectrum binaries from the literature, which includes 76 W-and 64 A-subtype systems with reliable physical parameters. We find that the average fractional difference and the standard deviation(σM) of the residuals for W-subtype and Asubtype approximately amount to 15.66% and 0.1218, 16.03% and 0.2094, respectively. Meanwhile, we also perform detailed analyses in accordance with the orbital period, the effective temperatures and the mass ratio. We find that the method is more applicable to determine masses for W UMa systems with low effective temperature and short period.

关键词： stars:binaries:eclipsing W Ursae Majoris(W UMa)binaries masses

From multicolor-photometric observations to a guaranteed mass of AL Cas

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Research in Astronomy and Astrophysics 2019年第8期19卷 19-30页

作者： ya-hui Wang Jin-zhong Liu Li-Na Lu Guo-Liang Lü School of Physical Science and Technology Xinjiang UniversityUrumqi830046China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi830011China University of Chinese Academy of Sciences Beijing100049China

We utilize the PAdova and TRieste Stellar Evolution Code(PARSEC) combined with photometric observations to determine a guaranteed mass of AL Cas and re-examine its related physical ***-photometric observations of AL Cas have been performed in 2016 and 2017. We use the WilsonDevinney(W-D) code to analyze the light curves and find that AL Cas is probably an A-subtype contact binary(f = 35.7±0.9%) with a mass ratio q = 0.6399±0.0230 and an effective temperature difference?T = 78 K. The mass-radius relation of a higher luminosity component for AL Cas is obtained by two methods: depending on calculation of the Roche lobe(DCRL method) and depending on calculation of the W-D code(DCWD method). Using this relationship with the PARSEC model, we investigate the component masses of AL Cas as M1 = 1.19±0.23 M⊙ with M2 = 0.76±0.18 M⊙ by the DCRL method and M1 = 1.22±0.26 M⊙ with M2 = 0.78±0.20 M ⊙ by the DCWD method. By means of the photometric studies, we examine the related physical properties of AL Cas with the latest findings. We update the orbital period(Porb = 0.50055593 d) of AL Cas according to six new times of light minimum together with those collected from the literature. Meanwhile, the(O-C)2 curve analysis suggests that the orbital period of AL Cas has a cyclic variation with a period of 81.25 yr and an amplitude of 0.01415 d. This cyclic change would be caused by the light-travel time effect from a third body. A similar mass of the third body(M3 sin i′= 0.279 M⊙) is derived from our two methods.

关键词： stars:binaries:close stars:binaries:eclipsing stars:individual:AL Cassiopeiae

C/2015 O1: A long-period comet with photometric observations

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Research in Astronomy and Astrophysics 2019年第5期19卷 27-30页

作者： Xuan Zhang Jin-zhong Liu ya-hui Wang Li-Na Lu Xinjiang Astronomical Observatory Chinese Academy of Sciences School of Physical Science and Technology Xinjiang University University of Chinese Academy of Sciences

In this work, we report the observations of the long-period comet C/2015 O1 performed on2018 January 29–30 and April 13 with the Nanshan 1-meter wide-field telescope operated by Xinjiang Astronomical Observatory. We obtain the morphological features of C/2015 O1 using an image enhancement method, and calculate the dust-activity parameter Afρ and the coma color based on photometric analysis. An obvious fan-shaped structure was observed at different observation times. We find that the activity of C/2015 O1 gradually decreases as the comet advances toward perihelion and the observed B-V and V-R colors are consistent with those of other comets.

关键词： comets general-comets individual(C/2015 O1)

Searching for a_(0)(980)-meson parton distribution function

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Communications in Theoretical Physics 2023年第8期75卷 111-118页

作者： Zai-hui Wu Hai-Bing Fu Tao zhong Yu Chen ya-Hong Dai Department of Physics Guizhou Minzu UniversityGuiyang 550025China

In this paper,we calculate the scalar a_(0)(980)-meson leading-twist wave function by using the light-cone harmonic oscillator model(LCHO),where the model parameters are determined by fitting theξ-moments■of its light-cone distribution ***,the a_(0)(980)-meson leading-twist light-cone distribution amplitudes with three different scalesζ=(1.0,2.0,5.2)Ge V are *** constructing the relationship between the a_(0)(980)-meson leading-twist parton distribution functions/valence quark distribution function and its LCHO wave function,we exhibit the■(x,ζ)and■(x,ζ)with different ***,we also calculate the Mellin moments of the a_(0)(980)-meson’s valence quark distribution function■with n=(1,2,3),i.e.■=0.027,■=0.018 and■=***,the scale evolution for the ratio of the Mellin moments x■are presented.

关键词： parton distribution functions light-cone distribution amplitudes light scalar meson light-cone harmonic oscillator model

Multi boron-doping effects in hard carbon toward enhanced sodium ion storage

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Journal of Energy Chemistry 2025年第1期100卷 730-738页

作者： Peng Zheng Wang Zhou Ying Mo Biao Zheng Miaomiao Han Qin zhong Wenwen yang Peng Gao Lezhi yang Jilei Liu College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University Greater Bay Area Institute for Innovation Hunan University Changsha Research Institute of Mining & Metallurgy Co. LTD.

Hard carbon （HC） has been considered as promising anode material for sodium-ion batteries （SIBs）.The optimization of hard carbon’s microstructure and solid electrolyte interface （SEI） property are demonstrated effective in enhancing the Na+storage capability,however,a one-step regulation strategy to achieve simultaneous multi-scale structures optimization is highly ***,we have systematically investigated the effects of boron doping on hard carbon’s microstructure and interface chemistry.A variety of structure characterizations show that appropriate amount of boron doping can increase the size of closed pores via rearrangement of carbon layers with improved graphitization degree,which provides more Na+storage ***-situ Fourier transform infrared spectroscopy/electrochemical impedance spectroscopy （FTIR/EIS） and X-ray photoelectron spectroscopy （XPS） analysis demonstrate the presence of more BC3and less B–C–O structures that result in enhanced ion diffusion kinetics and the formation of inorganic rich and robust SEI,which leads to facilitated charge transfer and excellent rate *** a result,the hard carbon anode with optimized boron doping content exhibits enhanced rate and cycling *** general,this work unravels the critical role of boron doping in optimizing the pore structure,interface chemistry and diffusion kinetics of hard carbon,which enables rational design of sodium-ion battery anode with enhanced Na+storage performance.

关键词： X ray photoelectron spectroscopy

Preparation and hydrogen permeation properties of BaCe_(0.95)Nd_(0.05)O_(3-δ) membranes

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Chinese Chemical Letters 2008年第10期19卷 1256-1259页

作者： Ming ya Cai hui Xia Luo zhong Li Armin Feldhoff Jtirgen Caro Hai hui Wang The Key Lab of Enhanced Heat Transfer and Energy Conservation of Chinese Ministry of Education School of Chemistry Engineering South China University of Technology Wushan Road Guangzhou 510640 China Institute of Physical Chemistry and Electrochemistry Leibniz University Hannover Callinstr. 3-3A D-30179 Hannover Received 31 March 2008 ＆ Chemical Germany

Dense mixed proton and electron conducting membrane made of BaCe0.95Nd0.05O3-δ （BCNd5） was prepared by pressing followed by sintering. X-ray diffraction （XRD） was used to characterize the phase structure of both the powder and the sintered membranes. The microstructure of the sintered membranes was studied by scanning electron microscopy （SEM）. Hydrogen permeation through the BCNd5 membrane was studied using a high temperature permeator. The hydrogen permeation fluxes under wet conditions are higher than those under dry conditions, which is due to H^＋ hopping via surface OH groups. At 925℃, a hydrogen permeation flux of 0.02 mL/min cm^2 was obtained under wet condition, which recommends BCNd5 as a potential material for hydrogen-selective membranes.

关键词： Hydrogen Mixed conductor Perovskite Membrane

Self-assembled graphene oxide/polyethyleneimine films as high-performance quartz crystal microbalance humidity sensors

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Rare Metals 2021年第6期40卷 1597-1603页

作者： Zhen Yuan hui-Ling Tai Yuan-Jie Su Guang-zhong Xie Xiao-Song Du ya-Dong Jiang State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054China

As humidity is one of the most widely demanded environmental parameters,the precision of its detection is *** advanced humidity sensor will improve the validity of the humidity monitoring *** this study,a facile chemical layer-by-layer self-assembly(CLS)method was developed for fabricating graphene oxide(GO)/polyethyleneimine(PEI)multilayer *** to the chemical bonding between the PEI and GO,and the intrinsic stickiness of the PEI,layered films with different numbers of layers were successfully prepared using the CLS method and confirmed through ultraviolet-visible(UV-Vis)spectroscopy and the mass loading of quartz crystal microbalance(QCM).Morphological measurements revealed that the roughness and thickness of the films increased exponentially with the number of *** GO/PEI films were deposited on QCM electrodes using the CLS method to produce the humidity *** humidity measurement results showed a high sensitivity(37.84 Hz/%RH)and rapid response/recovery(<5 s/8 s)of the optimal sensor,which was superior to that of recently developed QCM sensors.

关键词： Humidity sensors Quartz crystal microbalance Graphene oxide Polyethyleneimine Self-assembly