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Molecular doping for persistent afterglow

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Science China Chemistry 2022年第5期65卷 831-833页

Due to the long emissive lifetime and large Stokes shift,room temperature phosphorescence (RTP) and related materials (including purely organic compounds and organicinorganic hybrids) have attracted recent attention f... 详细信息

关键词： optoelectronic phosphor doping

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Investigation of microstructure changes in Al_(2)O_(3)-YSZ coatings and YSZ coatings and their effect on thermal cycle life

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Journal of Advanced Ceramics 2022年第2期11卷 345-353页

作者： meiqi dai Xuemei SONG Chucheng LIN Ziwei LIU Wei ZHENG Yi ZENG The State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Yttria-stabilized zirconia(YSZ)coatings and Al_(2)O_(3)–YSZ coatings were prepared by atmospheric plasma spraying(APS).Their microstructural changes during thermal cycling were investigated via scanning electron microscopy(SEM)equipped with electron backscatter diffraction(EBSD)and X-ray diffraction(XRD).It was found that the microstructure and microstructure changes of the two coatings were different,including crystallinity,grain orientation,phase,and phase *** differences are closely related to the thermal cycle life of the *** is a relationship between crystallinity and crack *** in grain orientation are related to microscopic strain and *** transition is the direct cause of coating *** this study,the relationship between the changes in the coating microstructure and the thermal cycle life is discussed in *** failure mechanism of the coating was comprehensively analyzed from a microscopic perspective.

关键词： thermal barrier coatings(TBCs) thermal cycling microstructure change microscopic strain failure mechanism

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城市森林中人与自然互动效益影响机制研究

林业经济 2021年第10期43卷 52-65页

作者：刘爱维戴美琪罗芬孔辉中南林业科技大学林学院长沙410004 中南林业科技大学旅游学院长沙410004 北京电子科技职业学院经管学院北京100716

良好的生态环境是最公平的公共产品,是最普惠的民生福祉。良好的城市森林环境在个人和社会层面都会带来多种积极效益。因此,城市森林中人与自然互动效益方面的研究越来越受到学者们的关注。文章基于Web of Science核心合集数据库,检索... 详细信息

良好的生态环境是最公平的公共产品,是最普惠的民生福祉。良好的城市森林环境在个人和社会层面都会带来多种积极效益。因此,城市森林中人与自然互动效益方面的研究越来越受到学者们的关注。文章基于Web of Science核心合集数据库,检索并收集到20多年来城市森林中人与自然互动的981篇相关文献进行分析,构建城市森林中人与自然互动效益影响机制研究的概念框架。主要分析城市森林中人与自然互动的作用过程,即互动动机、互动路径、互动效益及其影响因素四个方面。研究发现:互动动机可总结为亲近自然与放松、个人爱好与交际、情感交流和消磨时间四类;互动路径归纳为间接互动、偶尔互动和有意互动三个层次;互动效益包括心理效益、生理效益、认知效益、社会效益、精神效益和有形效益六个方面,每个方面都有其具体表现;影响城市森林中人与自然互动效益的因素又可概括为与城市森林等自然环境相关的供给端因素和与人们个体相关的需求端因素。文章对未来的城市森林中人与自然互动效益综合性研究进行了展望,提出应在4个方面加强研究:(1)完善城市森林中人与自然互动效益影响机制研究;(2)优化人与自然互动效益研究方法;(3)开展城市森林中人与自然互动效益的时空动态研究;(4)深化城市森林中人与自然互动效益影响因素的研究。

关键词：城市森林人与自然互动效益文献综述

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论民族文化旅游资源的保护与开发

湖南经济管理干部学院学报 2005年第2期16卷 24-25页

作者：戴美琪田定湘湖南经济管理干部学院湖南长沙410004 株洲工学院湖南株洲412008

民族文化旅游资源是旅游资源的重要组成部分,它具有原生性,丰富性,民族性,大众性,区域性的特点。保护与开发好民族文化旅游资源,对于开发少数民族地区的旅游,促进当地经济的发展具有重要的现实意义。

关键词：民族文化旅游资源保护与开发重要组成部分少数民族地区原生性丰富性民族性大众性区域性经济

中外游客对天门山国家森林公园旅游形象感知对比分析——基于网络文本内容分析

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中南林业科技大学学报（社会科学版） 2016年第5期10卷 72-77页

作者：任姿戴美琪中南林业科技大学旅游学院湖南长沙410004

运用内容分析法研究中外游客对天门山国家森林公园的旅游形象感知,结合ROST Content Mining软件对中外游客网络点评的高频词、社会语义网络和情感进行对比分析。研究发现:国内游客注重自然景色和自身感受而国外游客注重游憩活动,国外游... 详细信息

运用内容分析法研究中外游客对天门山国家森林公园的旅游形象感知,结合ROST Content Mining软件对中外游客网络点评的高频词、社会语义网络和情感进行对比分析。研究发现:国内游客注重自然景色和自身感受而国外游客注重游憩活动,国外游客对天门山的积极情感倾向高于国内游客,天门山国家森林公园的形象感知可以概括为"惊为天人"、"天门洞"和"索道"等。完善步道体系、扩大国外市场、加强服务意识、争取回头客有利于天门山国家森林公园的长足发展。

关键词：旅游形象感知网络文本分析天门山国家森林公园

城郊休闲农业旅游对社区居民的经济社会影响研究--以湖南省长沙市黄兴镇为例

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农业技术经济 2008年第4期 48-54页

作者：罗文斌吴次芳戴美琪汪友结吴泽斌浙江大学公共管理学院杭州310029 中南林业科技大学长沙410021

本文选择典型城郊休闲农业旅游地作为研究区域,主要对旅游开发后一定时期内的城郊休闲农业旅游所产生的微观经济社会影响进行研究。通过设计经济社会影响感知指标,采用问卷调查和因子分析法调查了城郊休闲农业旅游开发后一定时期内社区... 详细信息

本文选择典型城郊休闲农业旅游地作为研究区域,主要对旅游开发后一定时期内的城郊休闲农业旅游所产生的微观经济社会影响进行研究。通过设计经济社会影响感知指标,采用问卷调查和因子分析法调查了城郊休闲农业旅游开发后一定时期内社区居民经济社会影响感知,并运用SPSS统计软件对调查结果进行了统计分析。研究发现,城郊休闲农业旅游开发对社区居民的收入水平、收入方式、收入用途、收入效应、就业形势和就业观念等经济社会生活产生了重要影响;社区居民收入和就业影响因子主要集中在收入水平与收入用途影响、生活成本与经营意识影响、就业观念与劳动特征影响和收入方式与就业形势影响等4个具体因子上,社区居民对4个因子的感知强度有所差别。

关键词：休闲农业旅游社区居民经济社会影响感知

Research status and prospects of the fractal analysis of metal material surfaces and interfaces

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 20-38页

作者： Qinjin dai Xuefeng Liu Xin Ma Shaojie Tian Qinghe Cui Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China Laboratory for Advanced Materials Processing of Ministry of Education University of Science and Technology BeijingBeijing 100083China School of Mechanical and Electrical Engineering Xinjiang Institute of EngineeringUrumqi 830023China

As a mathematical analysis method,fractal analysis can be used to quantitatively describe irregular shapes with self-similar or self-affine *** analysis has been used to characterize the shapes of metal materials at various scales and *** methods make it difficult to quantitatively describe the relationship between the regular characteristics and properties of metal material surfaces and ***,fractal analysis can be used to quantitatively describe the shape characteristics of metal materials and to establish the quantitative relationships between the shape characteristics and various properties of metal *** the perspective of two-dimensional planes and three-dimensional curved surfaces,this paper reviews the current research status of the fractal analysis of metal precipitate interfaces,metal grain boundary interfaces,metal-deposited film surfaces,metal fracture surfaces,metal machined surfaces,and metal wear *** relationship between the fractal dimensions and properties of metal material surfaces and interfaces is *** from three perspectives of fractal analysis,namely,research scope,image acquisition methods,and calculation methods,this paper identifies the direction of research on fractal analysis of metal material surfaces and interfaces that need to be *** is believed that revealing the deep influence mechanism between the fractal dimensions and properties of metal material surfaces and interfaces will be the key research direction of the fractal analysis of metal materials in the future.

关键词： metal material surfaces and interfaces fractal analysis fractal dimension homogeneity

SensFL:Privacy-Preserving Vertical Federated Learning with Sensitive Regularization

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 385-404页

作者： Chongzhen Zhang Zhichen Liu Xiangrui Xu Fuqiang Hu Jiao dai Baigen Cai Wei Wang School of Automation and Intelligence Beijing Jiaotong UniversityBeijing100044China Shuohuang Railway Development Co. Ltd.National Energy GroupCangzhou062350China Beijing Key Laboratory of Security and Privacy in Intelligent Transportation School of Computer Science and TechnologyBeijing Jiaotong UniversityBeijing100044China

In the realm of Intelligent Railway Transportation Systems,effective multi-party collaboration is crucial due to concerns over privacy and data *** Federated Learning(VFL)has emerged as a promising approach to facilitate such collaboration,allowing diverse entities to collectively enhance machine learning models without the need to share sensitive training ***,existing works have highlighted VFL’s susceptibility to privacy inference attacks,where an honest but curious server could potentially reconstruct a client’s raw data from embeddings uploaded by the *** vulnerability poses a significant threat to VFL-based intelligent railway transportation *** this paper,we introduce SensFL,a novel privacy-enhancing method to against privacy inference attacks in ***,SensFL integrates regularization of the sensitivity of embeddings to the original data into the model training process,effectively limiting the information contained in shared *** reducing the sensitivity of embeddings to the original data,SensFL can effectively resist reverse privacy attacks and prevent the reconstruction of the original data from the *** experiments were conducted on four distinct datasets and three different models to demonstrate the efficacy of *** results show that SensFL can effectively mitigate privacy inference attacks while maintaining the accuracy of the primary learning *** results underscore SensFL’s potential to advance privacy protection technologies within VFL-based intelligent railway systems,addressing critical security concerns in collaborative learning environments.

关键词： Vertical federated learning privacy defenses

Peripheral blood RNA biomarkers can predict lesion severity in degenerative cervical myelopathy

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Neural Regeneration Research 2025年第6期20卷 1764-1775页

作者： Zhenzhong Zheng Jialin Chen Jinghong Xu Bin Jiang Lei Li Yawei Li Yuliang dai Bing Wang Department of Spine Surgery The Second Xiangya Hospital of Central South UniversityChangshaHunan ProvinceChina

Degenerative cervical myelopathy is a common cause of spinal cord injury,with longer symptom duration and higher myelopathy severity indicating a worse *** numerous studies have investigated serological biomarkers for acute spinal cord injury,few studies have explored such biomarkers for diagnosing degenerative cervical *** study involved 30 patients with degenerative cervical myelopathy(51.3±7.3 years old,12 women and 18 men),seven healthy controls(25.7±1.7 years old,one woman and six men),and nine patients with cervical spondylotic radiculopathy(51.9±8.6 years old,three women and six men).Analysis of blood samples from the three groups showed clear differences in transcriptomic *** analysis identified 128 differentially expressed genes that were enriched in patients with neurological *** least absolute shrinkage and selection operator analysis,we constructed a five-gene model(TBCD,TPM2,PNKD,EIF4G2,and AP5Z1)to diagnose degenerative cervical myelopathy with an accuracy of 93.5%.One-gene models(TCAP and SDHA)identified mild and severe degenerative cervical myelopathy with accuracies of 83.3%and 76.7%,*** of two immune cell types(memory B cells and memory-activated CD4^(+)T cells)predicted levels of lesions in degenerative cervical myelopathy with 80%*** results suggest that peripheral blood RNA biomarkers could be used to predict lesion severity in degenerative cervical myelopathy.

关键词： biomarkers candidate genes degenerative cervical myelopathy gene expression analysis immune cell types neurological disabilities peripheral blood RNA profiles spinal cord injury