检索结果-南通市图书馆

Chinese Physics B 2024年第10期33卷 213-219页

作者： Tong Chen Sanjiang Yang wanping zhou Xuesong Mei d Haoxue Qiao School of Physics and Technology Wuhan UniversityWuhan 430072China College of Physics and Electronic Science Hubei Normal UniversityHuangshi 435002China School of Physics and Telecommunications Huanggang Normal UniversityHuanggang 438000China Wuhan Maritime Communication Research Institute Wuhan 430072China

The geometric structure parameters and radial density distribution of 1s2s1S excited state of the two-electron atomic system near the critical nuclear charge Z_(c)were calculated in detail under tripled Hylleraas basis *** to the localized behavior observed in the ground and the doubly excited 2p^(23)Pe states,for this state our results identify that while the behavior of the inner electron increasingly resembles that of a hydrogen-like atomic system,the outer electron in the excited state exhibits diffused hydrogen-like character and becomes perpendicular to the inner electron as nuclear charge Z approaches Z_(c).This study provides insights into the electronic structure and stability of the two-electron system in the vicinity of the critical nuclear charge.

关键词： critical nuclear charge two-electron atomic system geometric structure density distribution

STABILITY CHARACTERISTICS OF LAMINAR BOUNDARY LAYERS OVER COMPLIANT WALLS

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 1989年第2期5卷 109-117页

作者： Li wanping zhou Heng (Tianjin University) Tianjin University Tianjin China

The stability characteristics of laminar boundary layers over compliant walls was studied by the linear *** the previous authors,the coupled motion of the fluid and solid was required to sat- isfy the continuity conditions of both the velocity and stress at the *** of calculations show that as the speed ratio or density ratio exceeds a certain threshold value,the two types of unstable waves will no longer be distinguishable,and the tangential component of the disturbance stress is no longer negligi- *** the neglect of it,as the previous authors did,is unjustified.

关键词： stability boundary layer compliant wall

Analytical expressions of non-relativistic static multipole polarizabilities for hydrogen-like ions

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第4期29卷 218-225页

作者： Xuesong Mei wanping zhou Zhenxiang Zhong Haoxue Qiao School of Physics and Technology Wuhan UniversityWuhan 430072China Engineering and Technology College Hubei University of TechnologyWuhan 430068China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071China

Analytical formulas for the static multipole polarizabilities of hydrogen-like ions are derived by using the analytical wave functions and the reduced Green function and by applying a numerical fitting *** results are then applied to the studies of blackbody radiation shifts to atomic energy levels at different *** analytical results can be served as a benchmark for other theoretical methods.

关键词： polrizabilities analytical formula hydrogen-like ions

Plant Stem Cell Informatics Database(PSCIdb):A comprehensive computational platform for identifying and analyzing genes related to plant stem cells

在线全文

学校读者我要写书评

暂无评论

Plant Communications 2024年第5期5卷 100-103页

作者： Xiao Wu Yubo Yuan Siyuan zhou Zewen Wang Hongxiang Li wanping Wu Zhijie Lei Siyao Liu Kaijie Qi Hao Yin Yun zhou Shaoling Zhang Sanya Institute of Nanjing Agricultural University State Key Laboratory of Crop Genetics&Germplasm Enhancement and UtilizationNanjing Agricultural UniversityNanjing 210095China Department of Botany and Plant Pathology Purdue UniversityWest LafayetteIN 47907USA Purdue Center for Plant Biology Purdue UniversityWest LafayetteIN 47907USA

Dear Editor,Stem cells in the meristems of land plants share conserved functions,remaining undifferentiated while continually dividing and producing daughter cells that eventually differentiate into various new organs(Meyerowitz,1997;Heidstra and Sabatini,2014).Stem cell activity is therefore essential for sustaining plant growth and development,determining yield and biomass production,and dictating the diversity of body formation and plant architecture across species(Meyerowitz,1997;Heidstra and Sabatini,2014;Harrison,2017;Kitagawa and Jackson,2019).

关键词： Informatics eventually dividing

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

三网融合背景下图书馆的应对策略

图书馆学研究 2010年第9期 36-38页

作者：周婉萍杭州市旅游职业学校图书馆

文章结合三网融合的发展进程,分析三网融合对图书馆的影响,并着重指出了图书馆在三网融合背景下的应对策略。

关键词：三网融合图书馆应对策略

在线全文

学校读者我要写书评

暂无评论

经导管肺动脉瓣置换术在儿科的应用

中华儿科杂志 2016年第9期54卷 717-720页

作者：周万平李奋上海交通大学医学院附属上海儿童医学中心心内科 200127

先天性心脏病是常见的先天畸形,发病率约为8/1 000,其中约20％的先天性心脏病可有右室流出道（RVOT）和（或）肺动脉瓣的异常,如肺动脉闭锁、法洛四联症、共同动脉干、大动脉错位等.这些患儿通常在早期进行外科手术干预.对于RVOT的处理... 详细信息

先天性心脏病是常见的先天畸形,发病率约为8/1 000,其中约20％的先天性心脏病可有右室流出道（RVOT）和（或）肺动脉瓣的异常,如肺动脉闭锁、法洛四联症、共同动脉干、大动脉错位等.这些患儿通常在早期进行外科手术干预.对于RVOT的处理通常是使用带瓣管道进行重建或行补片扩大.随着患儿的生长发育以及管道和瓣膜的进行性退化,可导致RVOT梗阻和（或）肺动脉瓣反流（PR）.前者可以引起右心室压力负荷增加,后者可引起右心室容量负荷增加.虽然右心室通常可以长期耐受这种改变,但随着压力和容量负荷的进行性增加,右心室可出现进行性增大,从而影响右心室功能,导致患儿运动能力下降、心房和（或）心室心律失常,甚至猝死.因此,对RVOT和PR进行治疗,恢复右心功能是非常必要的.

关键词：肺动脉瓣置换术右心室功能先天性心脏病压力负荷增加心室容量负荷进行性退化应用儿科

Novel Soft Magnetic Co-Based Ternary Co-Er-B Bulk Metallic Glasses

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2024年第9期37卷 1633-1642页

作者： Jie Lu Yanhui Li Shuang Ma wanping Li Feng Bao Zhengwang Zhu Qiaoshi Zeng Haifeng Zhang Man Yao Wei Zhang Key Laboratory of Materials Modification By Laser Ionand Electron Beams(Ministry of Education)School of Materials Science and EngineeringDalian University of TechnologyDalian116024China School of Metallurgy Northeastern UniversityShenyang110819China Center for High Pressure Science and Technology Advanced Research(HPSTAR) PudongShanghai201203China

In this work,a series of Co-based ternary Co-Er-B bulk metallic glasses(BMGs)with excellent soft magnetic properties and high strength were developed,and the local atomic structure of a typical Co_(71.5)Er_(3.5)B_(25) metallic glass was studied through in situ high-energy synchrotron X-ray diffraction and ab initio molecular dynamics *** results reveal that the BMG samples can be obtained in a composition region of Co_(68.5-71.5)Er_(3.5-4)B_(25-27.5) by a conventional copper-mold casting *** Co-Er-B metallic glasses possess stronger atomic bond strengths and denser local atomic packing structure composed of a higher fraction of icosahedral-like clusters but fewer deformed body-centered cubic and crystal-like polyhedrons,and they exhibit slower atomic diffusion behaviors during solidification,as compared to Co-Y-B *** enhancement in structural stability and the retardation of atomic-ordered diffusion lead to the better glass-forming ability of the Co-Er-B *** smaller magnetic anisotropy energy in the Co-Er-B metallic glasses results in a lower coercivity of less than 1.3 A/*** Co-Er-B BMGs exhibit high-yield strength of 3560-3969 MPa along with distinct plasticity of around 0.50%.

关键词： Co-based bulk metallic glass Glass-forming ability Soft magnetic property Ab initio molecular dynamics simulation Local atomic structure

High-order Hamiltonian obtained by Foldy-Wouthuysen transformation up to the order of mα^(8)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2023年第8期32卷 260-269页

作者：陈彤梅雪松周挽平乔豪学 School of Physics and Technology Wuhan UniversityWuhan 430072China Wuhan Maritime Communication Research Institute Wuhan 430072China School of Physics and Telecommunications Huanggang Normal UniversityHuanggang 438000China

Complete relativistic corrections of an effective Hamiltonian for a single-particle system in an external electromagnetic field and their unitary equivalent form up to the order of mα^(8) are *** derivation is based on two approaches applying Foldy-Wouthuysen(FW)transformation to the Dirac Hamiltonian for a particle in an external electromagnetic *** results are consistent with the previous work at the mα^(6) and mα^(8) order correction[***.A 71012503(2005);***.A 100012513(2019)].We also further consider the effect of anomalous magnetic moments,namely,the Dirac-Pauli equation,and obtain FW-Hamiltonians at the same *** results obtained can be used for the subsequent calculation of relativistic and radiation effects in simple atomic and molecular systems.

关键词： high-order correction relativistic corrections Foldy-Wouthuysen(FW)transformation effective Hamiltonians

在线全文

学校读者我要写书评

暂无评论

少电子原子体系精密谱理论和计算方法

中国科学：物理学、力学、天文学 2021年第7期51卷 17-35页

作者：王黎明周挽平严宗朝河南师范大学物理学院新乡453007 黄冈师范学院物理与电信学院黄冈438000 Department of Physics University of New BrunswickFredericton E3B 5A3Canada 中国科学院精密测量科学与技术创新研究院武汉430071

得益于现代激光精密测量技术,某些少电子原子体系(如氢、氦、锂、铍等)的光谱测量具有非常高的精度.高精度实验值与高精度理论值的对比,为高精度地检验基本物理理论、高精度地测定出基本物理常数以及原子核电荷半径等物理参数提供了重... 详细信息

得益于现代激光精密测量技术,某些少电子原子体系(如氢、氦、锂、铍等)的光谱测量具有非常高的精度.高精度实验值与高精度理论值的对比,为高精度地检验基本物理理论、高精度地测定出基本物理常数以及原子核电荷半径等物理参数提供了重要渠道.要把原子体系的光谱计算到当前实验值的精度并非易事,需要把电子关联效应、相对论效应和量子电动力学(QED)效应计算到足够高的精度.最近几十年来,得益于现代计算机技术的发展和此领域科研人员的不懈努力,少电子原子体系的精密计算取得了重要进展.本文介绍了高精度计算少电子原子体系能级的理论方法和计算技术,包括等效哈密顿量的推导、薛定谔方程的求解、相对论和QED效应的计算,以及原子核的有限质量效应和电荷分布半径效应;对近二三十年取得的重要进展进行了评述并对未来的发展进行了展望.

关键词：精密谱少电子原子薛定谔方程相对论效应 QED效应

Identification of host proteins that interact with African swine fever virus pE301R

在线全文

学校读者我要写书评

暂无评论

Engineering Microbiology 2024年第2期4卷 33-43页

作者： Menghan Shi Niu zhou Mengchen Xiu Xiangzhi Li Fen Shan Wu Chen wanping Li Cheng-Ming Chiang Xiaodong Wu Youming Zhang Aiying Li Jingjing Cao State Key Laboratory of Microbial Technology Microbial Technology InstituteShandong UniversityQingdao 266237China Guangzhou Zoo Guangzhou 510075China Wildlife Microbiology Laboratory Guangzhou Wildlife Research CenterGuangzhou 510075China Shandong Provincial Key Laboratory of Animal Cell and Developmental Biology School of Life SciencesAdvanced Medical Research InstituteShandong UniversityQingdaoChina Simmons Comprehensive Cancer Center University of Texas Southwestern Medical CenterDallasTX 75390USA Department of Biochemistry University of Texas Southwestern Medical CenterDallasTX 75390USA Department of Pharmacology University of Texas Southwestern Medical CenterDallasTX 75390USA China Animal Health and Epidemiology Center Qingdao 266032China

African swine fever virus(ASFV)infection poses enormous threats and challenges to the global pig industry;however,no effective vaccine is available against ASFV,attributing to the huge viral genome(approximately189 kb)and numerous encoding products(>150 genes)due to the limited understanding on the molecular mechanisms of viral *** the host-factor/viral-protein interaction network will reveal new targets for developing novel antiviral *** proteomic analysis,we identified 255 cellular proteins that interact with the ASFV-encoded pE301R protein when transiently expressed in HEK293T *** ontology(GO)annotation,Kyoto Encyclopedia of Genes and Genomes(KEGG)database enrichment,and protein-protein interaction(PPI)network analyses revealed that pE301R-interacting host proteins are potentially involved in various biological processes,including protein translation and folding,response to stimulation,and mitochondrial transmembrane *** interactions of two putative cellular proteins(apoptosis inducing factor mitochondria associated 1(AIFM1)and vimentin(VIM))with pE301R-apoptosis inducing factor have been verified by *** study revealed the inhibitory role of pE301R in interferon(IFN)induction that involves VIM sequestration by pE301R,identified interactions between ASFV pE301R and cellular proteins,and predicted the potential function of pE301R and its associated biological processes,providing valuable information to enhance our understanding of viral protein function,pathogenesis,and potential candidates for the prevention and control of ASFV infection.

关键词： African swine fever virus pE301R protein Protein-protein interaction network GO and KEGG analysis Interferon