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Measurement-induced disturbance between two atoms in Tavis-Cummings model with dipole dipole interaction
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作者 张国锋 王骁 吕广宏 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第10期136-138,共3页
Quantum correlation, measured by measurement-induced disturbance (MID), between two two-level atoms is investi- gated in detail in Tavis-Cummings model with dipole--dipole interaction (DDI). We find that MID can b... Quantum correlation, measured by measurement-induced disturbance (MID), between two two-level atoms is investi- gated in detail in Tavis-Cummings model with dipole--dipole interaction (DDI). We find that MID can be determined only by the dipole-dipole interaction between the two atoms when the cavity and atoms are at resonance. Moreover, DDI will have different effects on MID for two different kinds of initial states. 展开更多
关键词 measurement-induced disturbance (MID) Tavis-Cummings model dipole-dipole interaction(DDI)
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Three-dimensional land FD-CSEM forward modeling using edge finite-element method 被引量:3
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作者 LIU Jian-xin LIU Peng-mao TONG Xiao-zhong 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第1期131-140,共10页
A modeling tool for simulating three-dimensional land frequency-domain controlled-source electromagnetic surveys,based on a finite-element discretization of the Helmholtz equation for the electric fields,has been deve... A modeling tool for simulating three-dimensional land frequency-domain controlled-source electromagnetic surveys,based on a finite-element discretization of the Helmholtz equation for the electric fields,has been developed.The main difference between our modeling method and those previous works is edge finite-element approach applied to solving the three-dimensional land frequency-domain electromagnetic responses generated by horizontal electric dipole source.Firstly,the edge finite-element equation is formulated through the Galerkin method based on Helmholtz equation of the electric fields.Secondly,in order to check the validity of the modeling code,the numerical results are compared with the analytical solutions for a homogeneous half-space model.Finally,other three models are simulated with three-dimensional electromagnetic responses.The results indicate that the method can be applied for solving three-dimensional electromagnetic responses.The algorithm has been demonstrated,which can be effective to modeling the complex geo-electrical structures.This efficient algorithm will help to study the distribution laws of3-D land frequency-domain controlled-source electromagnetic responses and to setup basis for research of three-dimensional inversion. 展开更多
关键词 three-dimensional model frequency-domain electromagnetic method horizontal electric dipole forward modeling edge finite-element
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QM Chemical Shift Calculations to Infer on the Long-Range Aromatic Ring Current-Induced Field Contributions
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作者 Sankarampadi Aravamudhan 《材料科学与工程(中英文A版)》 2015年第5期181-196,共16页
关键词 化学位移计算 量子化学 感应磁场 质子化学位移 环电流 分子系统 芳香 位置计算
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Unraveling pathological mechanisms in neurological disorders:the impact of cell-based and organoid models
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作者 Jake Langlie Rahul Mittal +5 位作者 Ariel Finberg Nathalie B.Bencie Jeenu Mittal Hossein Omidian Yadollah Omidi Adrien A.Eshraghi 《Neural Regeneration Research》 SCIE CAS CSCD 2022年第10期2131-2140,共10页
Cell-based models are a promising tool in deciphering the molecular mechanisms underlying the pathogenesis of neurological disorders as well as aiding in the discovery and development of future drug therapies.The grea... Cell-based models are a promising tool in deciphering the molecular mechanisms underlying the pathogenesis of neurological disorders as well as aiding in the discovery and development of future drug therapies.The greatest challenge is creating cell-based models that encapsulate the vast phenotypic presentations as well as the underlying genotypic etiology of these conditions.In this article,we discuss the recent advancements in cell-based models for understanding the pathophysiology of neurological disorders.We reviewed studies discussing the progression of cell-based models to the advancement of three-dimensional models and organoids that provide a more accurate model of the pathophysiology of neurological disorders in vivo.The better we understand how to create more precise models of the neurological system,the sooner we will be able to create patient-specific models and large libraries of these neurological disorders.While three-dimensional models can be used to discover the linking factors to connect the varying phenotypes,such models will also help to understand the early pathophysiology of these neurological disorders and how they are affected by their environment.The three-dimensional cell models will allow us to create more specific treatments and uncover potentially preventative measures in neurological disorders such as autism spectrum disorder,Parkinson’s disease,Alzheimer’s disease,and amyotrophic lateral sclerosis. 展开更多
关键词 Alzheimer’s disease amyotrophic lateral sclerosis autism spectrum disorder cell-based model central nervous system induced pluripotent stem cells mesenchymal stem cells organoid model organ-on-a-chip Parkinson’s disease three-dimensional model
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几种典型近地表有限导体瞬变电磁特征响应研究 被引量:2
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作者 陈曙东 郭树旭 +4 位作者 张爽 袁志文 朱俊 张海洋 方东 《地球物理学报》 SCIE EI CAS CSCD 北大核心 2017年第1期403-412,共10页
近地表有限导体的瞬变电磁响应中包含其形状、结构特征,如何建立这些特征与其响应之间的关系是近地表有限导体探测与识别的核心问题.本文建立了几种典型有限导体响应的三维感应偶极子模型,通过有限导体早期幂函数衰减的幅度与速率、晚... 近地表有限导体的瞬变电磁响应中包含其形状、结构特征,如何建立这些特征与其响应之间的关系是近地表有限导体探测与识别的核心问题.本文建立了几种典型有限导体响应的三维感应偶极子模型,通过有限导体早期幂函数衰减的幅度与速率、晚期指数衰减的幅度与时间常数共四个模型参数表征有限导体的形状和结构特征,利用最小二乘拟合算法提取这些模型参数,揭示有限导体的形状、结构特征与模型参数之间的内在联系.理论与实验研究结果表明:具有绕球心旋转对称性的球形目标体,其三维感应偶极子响应完全相同,早期响应呈幂函数衰减,晚期呈e指数衰减,信号幅度和时间常数均能很好反映球体半径与材料特性;具有绕轴旋转对称性目标体,其三维感应偶极子响应部分相同,早期幂函数衰减的幅度与速率主要体现目标体的长度特征,晚期e指数衰减的时间常数体现了目标体的外径与壁厚特征;非轴对称性目标体,其三维感应偶极子响应均不相同,各个感应偶极子参数差异较大.本文的研究对提高瞬变电磁系统区分轴对称目标体与金属碎片能力,降低系统探测虚警率具有重要意义. 展开更多
关键词 近地表地球物理 未爆弹药 瞬变电磁 三维感应偶极子模型 特征响应 目标识别
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一种基于磁偶极子模型的铁磁体近场计算方法
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作者 余杰 林春生 周建军 《船电技术》 2014年第3期12-14,18,共4页
为计算铁磁体的感应磁场,在普通磁偶极子模型的基础上,结合微元的思想,研究了微元磁偶极子模型的计算方法,推导出了空间任一点感应磁场值的精确表达式。弥补了普通磁偶极子模型不能精确计算近场源点磁场的不足。分别用普通磁偶极子模型... 为计算铁磁体的感应磁场,在普通磁偶极子模型的基础上,结合微元的思想,研究了微元磁偶极子模型的计算方法,推导出了空间任一点感应磁场值的精确表达式。弥补了普通磁偶极子模型不能精确计算近场源点磁场的不足。分别用普通磁偶极子模型和微元磁偶极子模型计算了圆柱形铁磁体的感应磁场,结果表明,微元磁偶极子模型计算感应磁场精确度较高,可应用于工程实际。 展开更多
关键词 感应磁场 磁偶极子 微元 圆柱形铁磁体
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外部电场下水分子间静电相互作用的分子动力学研究(英文) 被引量:3
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作者 朱强 阚子规 马晶 《电化学》 CSCD 北大核心 2017年第4期391-399,共9页
本文利用分子动力学模拟探讨了不同外电场下,液态水的分子间作用及分子排布的变化.在不同外电场下,O…O原子间的径向分布函数差别很小,但是单个水分子的偶极矩的取向变化却很大.当外电场为0时,单个水分子偶极取向的范围很宽(30~150度).... 本文利用分子动力学模拟探讨了不同外电场下,液态水的分子间作用及分子排布的变化.在不同外电场下,O…O原子间的径向分布函数差别很小,但是单个水分子的偶极矩的取向变化却很大.当外电场为0时,单个水分子偶极取向的范围很宽(30~150度).与此同时,本文给出了局域诱导电场随着位置的变化关系图.当外加电场增强时,局域的诱导电场强度也随之增加.由于电场下偶极矩有序性的增加,局域诱导的静电相互作用能显著增加.计算结果表明,相对介电常数随着电场强度的增加而呈现指数衰减的变化形式.这一变化趋势可以用来理解不同电化学环境下,静电相互作用和局域诱导电场的变化. 展开更多
关键词 径向分布函数 介电常数 平均场模型 诱导电场 偶极矩
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