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网络科学理论与方法在旅游领域中的应用:研究进展与展望

中国化学会第九届全国量子化学学术会议

作者： haibo ma, chungen liu, yuansheng jiang institute of theoretical and computational chemistry, key laboratory of mesoscopic chemistry of moe, department of chemistry, nanjing university, nanjing, 210093

＜正＞The vertical excitation energies of low-lying π→π* excited states for medium to large sized oligomers of neutral polyenes and their radical cations and dications are calculated within Pariser-Parr-Pople （PPP） model by virtue of density matrix renormalization group （DMRG） method. The exponential extrapolations are also made to predict the excitation properties in the polymer limit for the valence excited states. For neutral polyenes, the dipole forbidden 21Ag state is predicted to locate below the dipole allowed 11Bu state for oligomers with more than three double bonds. The

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地球信息科学学报 2024年第2期26卷 259-273页

作者：郑允豪张毅牟乃夏蒋琪刘瑜北京大学地球与空间科学学院遥感与地理信息系统研究所北京100871 山东科技大学测绘与空间信息学院青岛266590 中国海洋大学信息科学与工程学部青岛266100

网络科学为全面探索旅游领域中各研究对象间的动态关系结构提供了有力支撑,打破了传统研究缺乏系统性思维的局限,对于进一步理解旅游业的运行规律具有重要意义。近年来随着旅游业的数字化变革,旅游信息变得更具灵活性与可扩展性,大幅提... 详细信息

网络科学为全面探索旅游领域中各研究对象间的动态关系结构提供了有力支撑,打破了传统研究缺乏系统性思维的局限,对于进一步理解旅游业的运行规律具有重要意义。近年来随着旅游业的数字化变革,旅游信息变得更具灵活性与可扩展性,大幅提高了网络科学理论与方法在旅游领域中的应用可行性。本文对与网络科学理论与方法在旅游领域中的应用研究相关的学术论文进行了系统梳理,并通过多尺度的视角归纳该领域的核心研究内容。本文首先概述了相关理论基础和应用现状,之后根据不同观测尺度下的旅游领域网络现象进行研究进展总结,具体为:微观尺度关注于目标旅游行动者的交互属性,介观尺度关注于旅游行动者的聚集现象,宏观尺度关注于旅游行动者网络的全局拓扑结构特征。在此基础上,本文指出了当前研究存在的问题(如数据可靠性、成果可解释性等),并对相关研究在当前的大数据时代与复杂性科学新纪元背景下的未来发展方向(如多尺度研究框架、多层网络等)进行了梳理,从而为后续研究提供思路。

关键词：旅游研究网络科学系统论信息化旅游管理社会网络复杂性

Rapid construction of highly-dispersed cobalt nanoclusters embedded in hollow cubic carbon walls as an effective polysulfide promoter in high-energy lithium-sulfur batteries

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Nano Research 2022年第6期15卷 5105-5113页

作者： Lin Sun Yanxiu liu Kaiqiang zhang Feng Cheng Ruiyu jiang Yangqing liu Jing Zhu Zhong Jin Huan Pang key laboratory for Advanced Technology in Environmental Protection of jiangsu Province School of Chemistry and Chemical EngineeringYancheng Institute of TechnologyYancheng 224051China moe key laboratory of mesoscopic chemistry MOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China School of chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009China

The ultrahigh specific energy density and low cost of lithium-sulfur batteries are suitable for the next generation of energy ***,the shuttle issue and sluggish conversion kinetics of polysulfides remain *** metal nanoclusters with strong polarity in conductive porous carbon is an effective strategy for tackling such knotty ***,we design and synthesize hollow cubic carbon embedded with highly dispersed cobalt nanoclusters as an effective sulfur reservoir for lithium sulfur *** large cavity structure and well-dispersed cobalt nanoclusters,with uniform sizes near 11 nm,enable the hosting structure to hold the high sulfur loading,70%capacity retention after 500 cycles at 2 C with a high sulfur loading of 6.5 mg·cm^(−2),effective stress release,accelerated polysulfide conversion,superior rate performance,strong physical confinement and chemical absorption *** density functional theoretical calculations demonstrate that the welldispersed cobalt nanoclusters in the hosting structure play a critical electrocatalytic role in boosting the capability of absorbing and converting polysulfides.

关键词： lithium-sulfur battery electrocatalysis Co nanocluster hollow carbon shuttle effect

Field distribution of the Z_(2)topological edge state revealed by cathodoluminescence nanoscopy

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Opto-Electronic Advances 2022年第4期5卷 76-84页

作者： Xiao He Donglin liu Hongfei Wang Liheng Zheng Bo Xu Biye Xie Meiling jiang Zhixin liu Jin zhang Minghui Lu Zheyu Fang School of Physics State Key Lab for Mesoscopic PhysicsAcademy for Advanced Interdisciplinary StudiesCollaborative Innovation Center of Quantum Matterand Nano-optoelectronics Frontier Center of Ministry of EducationPeking University Yangtze Delta Institute of OptoelectronicsPeking UniversityBeijing 100871China National laboratory of Solid State Microstructures Department of Materials Science and EngineeringNanjing UniversityNanjing 210093China College of chemistry and Molecular Engineering Peking UniversityBeijing 100871China department of Physics and HKU-UCAS Joint institute for theoretical and computational Physics at Hong Kong the University of Hong KongPokfulam RoadHong KongChina

Photonic topological insulators with robust boundary states can enable great applications for optical communication and quantum emission,such as unidirectional waveguide and single-mode ***,because of the diffraction limit of light,the physical insight of topological resonance remains unexplored in detail,like the dark line that exists with the crys-talline symmetry-protected topological edge ***,we experimentally observe the dark line of the Z_(2)photonic topo-logical insulator in the visible range by photoluminescence and specify its location by cathodoluminescence characteriza-tion,and elucidate its mechanism with the p-d orbital electromagnetic field distribution which calculated by numerical *** investigation provides a deeper understanding of Z_(2)topological edge states and may have great signific-ance to the design of future on-chip topological devices.

关键词： photonic topological insulator edge state cathodoluminescence TMDC

Importance of Au nanostructures in CO2 electrochemical reduction reaction

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Science Bulletin 2020年第10期65卷 796-802,M0003页

作者： Dong-Rui Yang Ling liu Qian zhang Yi Shi Yue Zhou chungen liu Feng-Bin Wang Xing-Hua Xia State key laboratory of Analytical chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China key laboratory of mesoscopic chemistry of moe Institute of Theoretical and Computational ChemistrySchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Electrochemical conversion of CO2 into fuels is a promising means to solve greenhouse effect and recycle chemical energy. However, the CO2 reduction reaction(CO2 RR) is limited by the high overpotential, slow kinetics and the accompanied side reaction of hydrogen evolution reaction. Au nanocatalysts exhibit high activity and selectivity toward the reduction of CO2 into CO. Here, we explore the Faradaic efficiency(FE)of CO2 RR catalyzed by 50 nm gold colloid and trisoctahedron. It is found that the maximum FE for CO formation on Au trisoctahedron reaches 88.80% at -0.6 V, which is 1.5 times as high as that on Au colloids(59.04% at -0.7 V). The particle-size effect of Au trisoctahedron has also been investigated, showing that the FE for CO decreases almost linearly to 62.13% when the particle diameter increases to 100 nm. The Xray diffraction characterizations together with the computational hydrogen electrode(CHE) analyses reveal that the(2 2 1) facets on Au trisoctahedron are more feasible than the(1 1 1) facets on Au colloids in stabilizing the critical intermediate COOH*, which are responsible for the higher FE and lower overpotential observed on Au trisoctahedron.

关键词： Gold nanostructures Electrocatalysis CO2 reduction reaction(CO2RR) Morphological effect Size effect

一种考虑颗粒表面形貌的固体推进剂细观模型构建方法

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固体火箭技术 2023年第4期46卷 535-540页

作者：袁嵩蒋秋梅张镇国翁琳海军装备部西安710025 西安航天动力技术研究所固体推进全国重点实验室西安710025 上海工程技术大学城市轨道交通学院上海201620

为研究颗粒形貌对固体推进剂细观力学响应的影响规律,提出了一种考虑颗粒复杂形貌的固体推进剂细观模型构建方法。将Voronoi结构与Abaqus二次开发相结合,通过对Voronoi晶胞进行随机缩放、体积修正等处理,可以快速生成圆形/球形、多边形... 详细信息

为研究颗粒形貌对固体推进剂细观力学响应的影响规律,提出了一种考虑颗粒复杂形貌的固体推进剂细观模型构建方法。将Voronoi结构与Abaqus二次开发相结合,通过对Voronoi晶胞进行随机缩放、体积修正等处理,可以快速生成圆形/球形、多边形/多面体的二维/三维细观模型,多边形/凸多面体状态的填充比理论上可以达到1。数值仿真实例表明,应变大于10%之后,多边形颗粒的界面损伤发展逐步快于圆形颗粒,验证了该方法的有效性,可为固体推进剂多尺度精细化研究提供有益参考。

关键词：固体推进剂 RVE模型多面体表面形貌 Voronoi结构