云南高校图书馆联盟文献共享服务平台- APPROXIMATION

APPROXIMATION: 作品数：1231被引量：1216H指数：13; 导出分析报告; 相关领域：理学更多>>; 相关作者：曹飞龙吴嘎日迪谢庭藩沈燮昌周颂平更多>>; 相关机构：北京大学宁夏大学西北工业大学中国计量学院更多>>; 相关期刊：更多>>; 相关基金：国家自然科学基金国家重点基础研究发展计划国家教育部博士点基金中国博士后科学基金更多>>

Effect of orbital symmetry on atomic ionization in near-infrared laser fields: 《Chinese Physics B》2025年第1期289-292,共4页Manqi Xu Shilin Hu Li Guo Jing Chen; Project supported by Li Ka Shing Foundation STUGTIIT Joint Research(Grant No.2024LKSFG02);the STU Scientific Research Foundation for Talents(Grant Nos.NTF22026,NTF23011,NTF23014,and NTF23036T);the National Basic Research Program of China(Grant No.2019YFA0307700);the National Natural Science Foundation of China(Grant Nos.12074239 and 12274300)。; We have performed a comparative study of the photoelectron spectra adopting different initial states(2s or 2_(p0))of hydrogen atoms in a near-infrared laser pulse by using the full three-dimensional time-dependent Sch...; 关键词：orbital symmetry photoelectron spectra strong-field approximation

Determining Hubbard U of VO_(2) by the quasi-harmonic approximation: 《Chinese Physics B》2024年第1期623-630,共8页孔龙娟陆雨航庄新莹周志勇胡振芃; supported by the National Natural Science Foundation of China (Grant Nos.21933006 and 21773124);the Fundamental Research Funds for the Central Universities Nankai University (Grant Nos.010-63233001,63221346,63213042,and ZB22000103);the support from the China Postdoctoral Science Foundation (Grant No.2021M691674);the Hefei National Laboratory for Physical Sciences at the Microscale (Grant No.KF2020105)。; Vanadium dioxide VO_(2) is a strongly correlated material that undergoes a metal-to-insulator transition around 340 K.In order to describe the electron correlation effects in VO_(2), the DFT+U method is commonly emplo...; 关键词：quasi-harmonic approximation vanadium dioxide first-principles calculation Hubbard U

Direct measurement of nonlocal quantum states without approximation: 《Chinese Physics B》2023年第11期252-256,共5页杨冈杨然龚彦晓祝世宁; Project supported by National Key Research and Development Program of China (Grant No. 2019YFA0705000);the National Natural Science Foundation of China (Grant No. 11974178)。; Efficient acquiring information from a quantum state is important for research in fundamental quantum physics and quantum information applications. Instead of using standard quantum state tomography method with recons...; 关键词：direct measurement quantum tomography nonlocal quantum state

Reflection and transmission of an Airy beam in a dielectric slab: 《Chinese Physics B》2022年第7期290-301,共12页Xiaojin Yang Tan Qu Zhensen Wu Haiying Li Lu Bai Lei Gong Zhengjun Li; the National Natural Science Foundation of China(Grant Nos.62071359,61975158,62001377,and 61801349);China Postdoctoral Science Foundation(Grant No.2016M602770);Natural Science Basic Research Plan in Shaanxi Province of China(Grant Nos.2019JQ405,2019JM-238,2020JM-192,and 2021JM-135);Natural Science Basic Research Program of Shaanxi,China(Grant No.2020JQ-331);Postdoctoral Science Foundation in Shaanxi Province and the Fundamental Research Funds for the Central Universities,Scientific Research Program Funded by Shaanxi Provincial Education Department(Grant No.20JS059);the Open Foundation of Laboratory of Pinghu,Pinghu,China。; The reflection and transmission of a finite-power Airy beam incident on a dielectric slab are investigated by an analytical method.Based on the plane-wave angular spectrum expansion and Fresnel approximation,the analy...; 关键词：Airy beam dielectric slab Fresnel approximation reflection and transmission

Effective Hamiltonian of the Jaynes–Cummings model beyond rotating-wave approximation: 《Chinese Physics B》2021年第6期300-305,共6页Yi-Fan Wang Hong-Hao Yin Ming-Yue Yang An-Chun Ji Qing Sun; supported by the National Natural Science Foundation of China (Grant No. 11875195);the Foundation of Beijing Education Committees,China(Grant Nos. CIT&TCD201804074 and KZ201810028043)。; The Jaynes–Cummings model with or without rotating-wave approximation plays a major role to study the interaction between atom and light. We investigate the Jaynes–Cummings model beyond the rotating-wave approximati...; 关键词：Jaynes–Cummings model Floquet theory high-frequency approximation

Stabilized seventh-order dissipative compact scheme for two-dimensional Euler equations被引量：1: 《Chinese Physics B》2019年第10期408-416,共9页Jia-Xian Qin Ya-Ming Chen Xiao-Gang Deng; Project supported by the National Natural Science Foundation of China(Grant No.11601517);the Basic Research Foundation of National University of Defense Technology(Grant No.ZDYYJ-CYJ20140101); We derive in this paper a time stable seventh-order dissipative compact finite difference scheme with simultaneous approximation terms(SATs) for solving two-dimensional Euler equations. To stabilize the scheme, the ch...; 关键词：compact scheme time stability simultaneous APPROXIMATION TERM interface treatment

Controllable precision of the projective truncation approximation for Green's functions: 《Chinese Physics B》2019年第4期317-325,共9页Peng Fan Ning-Hua Tong; Project supported by the National Key Basic Research Program of China(Grant No.2012CB921704);the National Natural Science Foundation of China(Grant No.11374362);the Fundamental Research Funds for the Central Universities;the Research Funds of Renmin University of China(Grant No.15XNLQ03); Recently, we developed the projective truncation approximation for the equation of motion of two-time Green's functions(Fan et al., Phys. Rev. B 97, 165140(2018)). In that approximation, the precision of results depen...; 关键词：PROJECTIVE TRUNCATION APPROXIMATION two-time Green’s functions SINGLE-BAND ANDERSON impurity model numerical RENORMALIZATION group

First-principles study of the(Cu_xNi_(1-x))_3 Sn precipitations with different structures in Cu–Ni–Sn alloys被引量：2: 《Chinese Physics B》2018年第8期423-433,共11页Guang-Wei Peng Xue-Ping Gan Zhou Li Ke-Chao Zhou Stalte Key Laborattory of Powder Metallurgy Centra; Project supported by the National Key Research and Development Program of China(Grant No.2016YFB0301402);the Project of Innovation-Driven Plan in Central South University;the State Key Laboratory of Powder Metallurgy,Central South University,Changsha,China; The structural parameters, the formation energies, and the elastic and thermodynamic properties of the （CuxNi1-x）3Sn phase with different structures are studied by the virtual crystal approximation （VCA） and super...; 关键词：（CuxNi1-x）3Sn first-principle virtual crystal approximation super-cell

Noise decomposition algorithm and propagation mechanism in feed-forward gene transcriptional regulatory loop: 《Chinese Physics B》2018年第2期92-103,共12页桂容李治泓胡丽君程光晖刘泉熊娟贾亚易鸣; Project supported by the Fundamental Research Funds for the Central Universities,China(Grant Nos.2662015QC041 and 2662014BQ069);the Huazhong Agricultural University Scientific&Technological Self-innovation Foundation,China(Grant No.2015RC021);the National Natural Science Foundation of China(Grant Nos.11675060,91730301,11547244,and 11474117); Feed-forward gene transcriptional regulatory networks, as a set of common signal motifs, are widely distributed in the biological systems. In this paper, the noise characteristics and propagation mechanism of various ...; 关键词：feed-forward loop noise propagation noise decomposition linear noise approximation

Photoelectron longitudinal momentum distributions containing nondipole effects: 《Chinese Physics B》2018年第1期335-340,共6页霍一宁李健马凤才; Project supported by the National Natural Science Foundation of China(Grant No.11274149);the Program of Shenyang Key Laboratory of Optoelectronic Materials and Technology,China(Grant No.F12-254-1-00); This paper proposes a modified strong field approximation model for evaluating nondipole effects on the ionization of an atom in an intense laser field. The photoelectron longitudinal momentum distributions （PLMD） o...; 关键词：strong field approximation PHOTOELECTRON longitudinal momentum distributions nondipole effects

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