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R-branch high-lying transition emission spectra of SbNa molecule

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Chinese Physics B 2021年第1期30卷 221-228页

作者： Chun-Run Luo Qun-Chao Fan Zhi-Xiang Fan Jia Fu Jie Ma Hui-Dong Li Yong-Gen Xu School of Science Research Center for Advanced ComputationXihua UniversityChengdu 610039China State key Laboratory of Quantum Optics and Quantum Optics Devices Laser Spectroscopy LaboratoryCollege of Physics and Electronics EngineeringShanxi UniversityTaiyuan 030006China

The calculation results of the R-branch transition emission spectra of(0–0) band of the A21 → X21 transition system of Sb Na molecule are presented in this paper. These R-branch high-lying transitional emission spectral lines are predicted by using the difference converging method(DCM). Our results show excellent agreement between DCM spectral lines and the experimental values, and the deviations are controlled within 0.0224 cm-1. What is more, based on the principle of over-determined linear equations, the prediction error is quantified in this work, which provides reliable theoretical support for our predicted DCM calculations. This work provides a lot of useful information for understanding the microstructure of Sb Na molecule.

关键词： SbNa transitional spectral lines R-branch difference converging method

Sedimentary architecture models of deepwater turbidite channel systems in the Niger Delta continental slope,West Africa

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Petroleum Science 2013年第2期10卷 139-148页

作者： Liu Li Zhang Tingshan Zhao Xiaoming Wu Shenghe Hu Jialiang Wang Xing Zhang Yikai School of Resource and Environment Southwest Petroleum University State key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology College of Geosciences China University of Petroleum The Petroleum Institute Abu Dhabi 2533The United Arab Emirates Research Institute China National Offshore Oil Corp

This paper studied an architecture model of turbidite channel systems based on the shallow- layer high resolution 3D seismic information in the deepwater area in the Niger Delta continental slope, West Africa as a prototype model. Different types of channel systems were identified and the corresponding architecture models were established. The controlling factors, evaluation criteria and spatial distribution of different channel systems were analyzed. This study shows that turbidite channel systems of West Africa could be classified into three types; confined, semi-confined and unconfined, according to the condition of canyon and the levees on both sides. Oil one hand, along the transport direction, channel system evolves from confined to unconfined. Within channel systems, channel complexes, including two types of incised and enveloped, are the most important reservoir bodies. On the other hand, there is a channel complex evolution from incised to enveloped vertically. The geological factors exert impacts of different levels on the architecture of the turbidite channels in different sedimentary systems or even within the same system.

关键词： Niger Delta continental slope deepwater deposits turbidite channel systems architecturemodels

Coupling Mechanism of Rural Settlements and Mountain Disasters in the Upper Reaches of Min River

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Journal of Mountain Science 2014年第1期11卷 66-72页

作者： DING Ming-tao CHENG Zun-lan WANG Qing School of Environment and Resources Southwest University of Science and Technology Institute of Mountain Hazards and Environment Chinese Academy of Sciences

Human settlements are the place where human beings live,among which the rural settlements can be regarded as a reflection of human-land relationship in mountain areas because their vertical distribution is greatly influenced by the specific geographical environment and ecological conditions of *** on field investigation,this paper uses physical,geographical,and ecological theories to make a comprehensive study of rural settlements and mountain disasters in the upper Min River,which is an ecologically fragile area with high-frequency disasters(collapse,landslide,debris flow,etc.) and a minority inhabit *** applying these modern scientific theories,this paper attempts to shed some light on the relationship between rural settlements and mountain ***,an in-depth understanding of this relationship was achieved as follows:(1) Rural settlements and mountain disasters are mainly distributed in the intercepted flows of water and soil; and both quantity and quality of arable lands in mountains are important indicators of these flows.(2) The Small Watershed Management project is a complex system of rural settlements and mountain disasters that interacts with and constrains the ecological *** this project,the human survival will be better *** fundamental for the ecological reconstruction,the coupling mechanism of rural settlements and mountain disasters is not only an engine to promote harmonious development between human and nature,but also a bridge to link them.

关键词： The upper reaches of Min River Mountain disaster Rural settlement Coupling mechanism Remote sensing

Effects of medium fluid cavitation on fluctuation characteristics of magnetic fluid seal interface in agricultural centrifugal pump

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International Journal of Agricultural and Biological Engineering 2021年第6期14卷 85-92页

作者： Zhenggui Li Wangxu Li Qifan Wang Ru Xiang Jie Cheng Wei Han Zhaoqiang Yan key Laboratory of Fluid and Power Machinery Ministry of EducationXihua UniversityChengdu 610039China Huaneng Gansu Hydropower Development Co. LtdLanzhou 730000China School of Energy and Power Engineering Lanzhou University of TechnologyLanzhou 730050China Zigong Zhaoqiang Sealing Products Industrial Co. LtdZigong 643000SichuanChina

The fluctuation law of magnetic fluid seal interface of an agricultural centrifugal pump is theoretically unknown;the pressure and velocity fluctuations are crucial factors that cause interface *** this study,the pressure and velocity fluctuations of the sealing interface on an agricultural centrifugal pump during cavitation were investigated based on the methods of Ansys CFX numerical calculation and experimental *** results demonstrated that at the same flow rate,the pressure fluctuation amplitude of the sealing interface decreased gradually from the shaft surface to the bottom of the polar *** different flow rates,the amplitude of the pressure fluctuation decreased with an increase in the flow *** cavitation of the medium aggravated the impact and water hammer of the liquid,leading to the occurrence of the jitter phenomenon in the sealing interface to accelerate the fluctuation frequency of the axial velocity of the sealing liquid,which accelerated the emulsification of the magnetic *** law can provide a reference for the design of magnetic fluid sealing devices for agricultural centrifugal pumps.

关键词： centrifugal pump magnetic liquid sealing device medium cavitation interface fluctuations

Ground-state vortex structures of a rotating binary dipolar Bose–Einstein condensate confined in harmonic plus quartic potential

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Chinese Physics B 2019年第1期28卷 251-256页

作者： Guang-Ping Chen Chang-Bing Qiao Hui Guo Lin-Xue Wang Ya-Jun Wang Ren-Bing Tan School of Intelligent Manufacturing Sichuan Art and Science UniversityDazhou 635000China School of Chemistry and Chemical Engineering Sichuan Art and Science UniversityDazhou 635000China key Laboratory of Time and Frequency Primary Standards National Time Service CenterChinese Academy of SciencesXi’an 710600China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China College of Mathematics and Physics Chongqing University of Science and TechnologyChongqing 401331China

We consider a binary dipolar Bose–Einstein condensate confined in a rotating harmonic plus quartic potential *** ground-state vortex structures are numerically obtained as a function of the contact interactions and the dipole–dipole interaction in both slow and rapid rotation cases. The results show that the vortex configurations depend strongly on the strength of the contact interactions, the relative strength between dipolar and contact interactions, as well as on the orientation of the dipoles. A variety of exotic ground-state vortex structures, such as pentagonal and hexagon vortex lattice,square vortex lattice with a central vortex, annular vortex lines, and straight vortex lines, are observed by turning such controllable parameters. Our results deepen the understanding of effects of dipole–dipole interaction on the topological defects.

关键词： Bose–Einstein condensate dipolar–dipolar interaction harmonic plus quartic potential trap vortex structure

Frequency Dispersion of Love Waves in a Piezoelectric Nanofilm Bonded on a Semi-infinite Elastic Substrate

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Chinese Journal of Mechanical Engineering 2015年第6期28卷 1157-1162页

作者： ZHANG Sijia GU Bin ZHANG Hongbin PAN Rongying Alamusi FENG Xiqiao School of Manufacturing Science and Engineering Southwest University of Science and Technology School of Civil Engineering and Architecture Hainan University Institute of Biomechanics and Medical Engineering Department of Engineering MechanicsTsinghua University

Research on the propagation of elastic waves in piezoelectric nanostructures is very limited. The frequency dispersion of Love waves in layered piezoelectric nanostructures has not yet been reported when surface effects are taken into account. Based on the surface elasticity theory, the propagation of Love waves with surface effects in a structure consisting of a nanosized piezoelectric film and a semi-infinite elastic substrate is investigated focusing on the frequency dispersion curves of different modes. The results show that under the electrically-open conditions, surface effects give rise to the dependence of Love wave dispersion on the film thickness when the thickness of the piezoelectric film reduces to nanometers. For a given wave frequency, phase velocity of Love waves in all dispersion modes exhibit obvious toward shift as the film thickness decreases or the surface parameters increase. Moreover, there may exist a cut-off frequency in the first mode dispersion below which Love waves will be evanescent in the structure due to surface effects. The cut-off frequency depends on the film thickness, the surface parameters and the bulk material properties.

关键词： surface effects electrically-open frequency dispersion love wave piezoelectric nanofilm

Highly efficient removal of Cr(Ⅵ)from wastewater via adsorption with novel magnetic Fe_3O_4@C@MgAl-layered double-hydroxide

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Chinese Chemical Letters 2015年第9期26卷 1137-1143页

作者： Hui Zhang Fei Huang De-Lei Liu Peng Shi College of Chemistry and Chemical Engineering Southwest Petroleum University OilεGas Field Applied Chemistry key Laboratory of sichuan Province Southwest Petroleum University Xinjiang Petroleum Survey and Design Institute

Novel magnetic Fe3O4@C@MgAl-layerecl double-hydroxide（LDH） nanoparticles have been successfully prepared by the chemical self-assembly *** properties of surface functional groups,crystal structure,magnetism and surface morphology of magnetic nanoparticles were characterized by Fourier transform infrared spectroscopy（FT-IR）,X-ray diffraction（XRD）,thermal gravity-differential thermal gravity（TG-DTG）,scanning electron microscopy（SEM）,and transmission electron microscopy（TEM）.The adsorption studies of the novel adsorbent in removing heavy metals Cr（Ⅵ） from waste water showed that the maximum absorption amount of Cr（Ⅵ） was 152.0 mg/g at 40℃ and pH *** excellent adsorption capacity of the Fe3O4@C@MgAl-LDH nano-absorbents plus their easy separation,environmentally friendly composition and reusability makes them more suitable adsorbents for the removal of metal ions from waste water.

关键词： Magnetic nanoparticles MgAl-layered double-hydroxide Adsorption Chromium(VI)

Effects of thickness & shape on localized surface plasmon resonance of sexfoil nanoparticles

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Chinese Physics B 2017年第1期26卷 508-513页

作者： Yan Chen Xianchao Liu Weidong Chen Zhengwei Xie Yuerong Huang Ling Li College of Physics and Electronic Engineering Sichuan Normal University Chengdu 610101 China State key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Information University of Electronic Science and Technology Chengdu 610054 China

Localized surface plasmon （LSPR） resonance and sensing properties of a novel nanostructure （sexfoil nanoparticle） are studied using the finite-difference time-domain method. For the sandwich sexfoil nanoparticle, the calculated extinction spectrum shows that with the thickness of the dielectric layer increasing, long-wavelength peaks blueshift, while short- wavelength peaks redshift. Strong near-field coupling of the upper and lower metal layers leads to electric and magnetic field resonances; as the thickness increases, the electric field resonance gradually increases, while the magnetic field resonance decreases. The obtained refractive index sensitivity and figure of merit are 332 nm/RIU and 3.91 RIU^-1, respectively. In order to obtain better sensing ability, we further research the LSPR character of monolayer Ag sexfoil nanoparticle. After a series of trials to optimize the thickness and shape, the refractive index sensitivity approximates 668 nm/RIU, and the greatest figure of merit value comes to 14.8 RIU^-1.

关键词： sexfoil nanoparticle localized surface plasmon resonance extinction properties LSPR sensors

Lattice dynamics properties of chalcopyrite ZnSnP_2:Density-functional calculations by using a linear response theory

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Chinese Physics B 2017年第4期26卷 307-312页

作者：虞游董玉静沈艳红赵国栋郑小林盛佳南 College of Optoelectronic Technology Chengdu University of Information Technology School of Science and Technology Xinyang University

We present a first-principles study of the structural,dielectric,and lattice dynamical properties for chalcopyrite semiconductor *** structural properties are calculated using a plane-wave pseudopotential method of densityfunctional theory.A linear response theory is used to derive Born effective charge tensors for each atom,dielectric constants in low and high frequency limits,and phonon *** calculate all zone-center phonon modes,identify Raman and infrared active modes,and report LO-TO splitting of the infrared *** results show an excellent agreement with experiment and propose several predictive behaviors.

关键词： phonon Born effective charge dielectric permittivity linear response theory