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利川市黄泥塘矿区饰面用灰岩矿床地质特征分析

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中国资源综合利用 2023年第3期41卷 80-82页

作者：赵军张孝国鲍昌勇陈林曹文胜方喜林湖北省地质局第二地质大队湖北恩施445000

本文以利川市黄泥塘矿区为研究区,结合区域地质背景,分析饰面用灰岩矿床地质特征。研究发现,矿体赋存在三叠系下统大冶组四段上亚段(T_(1)d^(4-2)),呈层状、似层状产出,矿体形态完整、边界清晰,厚度变化稳定,矿石物理机械性能满足饰面... 详细信息

本文以利川市黄泥塘矿区为研究区,结合区域地质背景,分析饰面用灰岩矿床地质特征。研究发现,矿体赋存在三叠系下统大冶组四段上亚段(T_(1)d^(4-2)),呈层状、似层状产出,矿体形态完整、边界清晰,厚度变化稳定,矿石物理机械性能满足饰面石材的一般工业指标要求,矿山规模为中型。该矿区饰面用灰岩属于中-高档饰面石材,具有较好的开发利用价值。

关键词：饰面用灰岩矿床地质特征利川市

Recent progress of seismic research on tall buildings in China Mainland

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Earthquake Engineering and Engineering Vibration 2014年第S1期13卷 47-61页

作者： Lu xilin Jiang Huanjun State Key Laboratory of Disaster Reduction in Civil Engineering Tongji University

As a result of rapid economic growth and urbanization in the past two decades,many tall buildings have been constructed in China Mainland,offering researchers and practitioners an excellent opportunity for research and practice in the field of structural engineering. This paper reviews progress by researchers throughout China Mainland on the seismic research of tall buildings,focusing on three major topics that impact the seismic performance of tall buildings. These are:(1) new types of steel-concrete composite structural members such as steel-concrete composite shear walls and columns,(2) earthquake resilient shear wall structures such as shear walls with replaceable structural components,self-centering shear walls and rocking walls,and(3) performance-based seismic design,including seismic performance index,performance level and design method. The paper concludes by presenting future research needs and directions in this field.

关键词： tall buildings steel-concrete composite member earthquake resilient structure performance-based seismic design

湖北省鹤峰县走马地区王家界锰矿地球化学特征及成因分析

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资源环境与工程 2018年第4期32卷 539-545页

作者：曹文胜王红军陈林方喜林赵军冉中夏李哲武湖北省地质局第二地质大队湖北恩施445000 河南省地质矿产勘查开发局第一地质矿产调查院河南洛阳471023

王家界锰矿为鹤峰县走马地区发现的"大塘坡式"锰矿。通过对大塘坡组含锰岩系样品进行主微量和稀土元素地球化学分析,发现本区含锰岩系有陆源物质的加入,并显示出热水沉积特征; Al2O3/(Al2O3+Fe2O3)、Al/(Al+Fe)、Al/(A1+Fe+Mn)、δCe、(... 详细信息

王家界锰矿为鹤峰县走马地区发现的"大塘坡式"锰矿。通过对大塘坡组含锰岩系样品进行主微量和稀土元素地球化学分析,发现本区含锰岩系有陆源物质的加入,并显示出热水沉积特征; Al2O3/(Al2O3+Fe2O3)、Al/(Al+Fe)、Al/(A1+Fe+Mn)、δCe、(La/Ce)N等值与被动大陆边缘沉积物特征相似;Al2O3/(Al2O3+Fe2O3)-(La/Ce)N和Fe2O3/(100-Si O2)-Al2O3/(100-Si O2)关系图及V/Cr值、U/Th-Ni/Co图解,表明本区与长阳古城锰矿形成于类似的构造环境。走马地区含锰岩系形成于被动大陆边缘的沉积构造体系,成岩成矿物质具有多来源。含锰岩系和锰矿石的形成可以分为两个阶段:早阶段洋底热液上涌的Mn2+与陆源输入的Mn2+在氧化性水体中形成了锰的氧化物,随后下沉被掩埋在缺氧带之下,在成岩过程中和有机物质相互作用,氧化物被还原释放出的Mn2+和有机碳被氧化释放出的CO2-3结合形成碳酸锰(菱锰矿)。

关键词：王家界锰矿大塘坡式菱锰矿地球化学特征成因分析

Single-cell transcriptomic profiling reveals ZEB1-mediated regulation in microglial subtypes and the impact of exercise on neuroinflammatory responses

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Traditional Medicine Research 2025年第2期10卷 55-64页

作者： Jin-fang Wu Yi-Sheng Chen Yu-Chun Xie Department of Rehabilitation Medicine Jiangsu Province Geriatric HospitalNanjing 210024China Fujian Key Laboratory of Toxicant and Drug Toxicology Medical CollegeNingde Normal UniversityNingde 352100China Central Laboratory Jiangsu Province Geriatric HospitalNanjing 210024China

Background:This study aims to identify distinct cellular subtypes within brain tissue using single-cell transcriptomic analysis,focusing on specific biomarkers that differentiate cell types and the effects of traditional and exercise ***:Four samples were analyzed:older control(OC),older exercise(OE),younger control(YC),and younger exercise(YE).Single-cell RNA sequencing was used to distinguish cellular subtypes through their biomarker *** visualization included violin and t-SNE plots to illustrate biomarker expression across cell clusters such as oligodendrocytes,microglia,and ***,BV2 cells were exposed to amyloid-beta fragments to simulate Alzheimer’s disease,assessing the impact of exercise-induced cellular ***:Distinct cellular subtypes were identified:oligodendrocytes(MBP,St18),microglia(Dock8),and astrocytes(Aqp4,Gpc5).Sample OE was predominantly oligodendrocytes,while YE had more astrocytes,inhibitory neurons,and Canal-Retzius *** showed a significant presence of Olfm3+ganglion ***1 gene knockout revealed changes in SMAD family gene expression,which regulate *** stress levels were also ***:This profiling enhances our understanding of brain cellular functions and interactions,potentially informing targeted therapies in neurological *** may influence brain cell immune responses and cell death pathways by regulating specific gene expressions,offering new insights for treating neuroinflammation and degeneration.

关键词： single-cell transcriptomics brain tissue cellular subtypes biomarker expression neuronal diversity

Highly efficient through-space charge transfer TADF molecule employed in TADF-and TADF-sensitized organic light-emitting diodes

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Science China Chemistry 2024年第4期67卷 1270-1276页

作者： Jiasen Zhang Deli Li Wei Li Yujie Wu xilin Mu Chunyu Liu Kaibo fang Ziyi Ge Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of TechnologyGuangzhou 510640China

The inception and harnessing of excitons are paramount for the electroluminescence performance of organic light-emitting devices(OLEDs).Through-space charge transfer(TSCT)via intramolecular interaction has proved to be one of the most potent techniques employed to achieve 100% internal quantum ***,molecular strategies utilized to comprehensively enhance the electroluminescent performance of TSCT emitters regarding improving the photoluminescence quantum yield(PLQY)and elevating the light out-coupling efficiency remain *** surmount this challenge,we deliberately designed and synthesized a proof-of-concept TSCT emitter called CzO-TRZ by incorporating an extra carbazole donor into spiroheterocyclic *** introduction of rigid spiral fragments can immensely boost the horizontal orientation dipole ratio and establish an extra through-bond charge transfer(TBCT)radiative decay *** a result,a very high PLQY of 98.7%,fast kRISCof 2.2×10^(5)s^(-1)and high k_(r)^(s) of 2.2×10^(7)s^(-1),and an ultrahigh horizontal dipolar ratio of 90%were concurrently achieved for Cz O-TRZ blended ***,corresponding thermally activated delayed fluorescence(TADF)-and TADF-sensitized fluorescence(TSF)-OLEDs based on CzO-TRZ demonstrated external quantum efficiencies(EQEs)of 33.4% and 30.3%,respectively,highlighting its versatile applications as both an emitter and sensitized host.

关键词： organic electronics organic light-emitting diodes polycyclic aromatic hydrocarbons multiple-resonance

Electrical stimulation for brighter persistent luminescence

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Light(Science & Applications) 2024年第8期13卷 1590-1601页

作者： xilin Ma Yuhua Wang Takatoshi Seto Key Laboratory for Special Function Materials and Structural Design of the Ministry of Education National&Local Joint Engineering Laboratory for Optical Conversion Materials and Technology of National Development and Reform CommissionDepartment of Materials ScienceSchool of Materials and EnergyLanzhou UniversityNo.222South Tianshui RoadLanzhouGansu 730000China

An immature understanding of the mechanisms of persistent luminescence(PersL)has hindered the development of new persistent luminescent materials(PersLMs)with increased *** this regard,in-situ direct current(DC)electric field measurements were conducted on a layered structure composed of the SrAl_(2)O_(4):Eu^(2+),Dy^(3+)phosphor,and an *** this study,the photoluminescence(PL)and afterglow properties were investigated with respect to voltage by analyzing the current signal and thermoluminescence(TL)*** intensity of PersL increased due to a novel phenomenon known as“external electric field stimulated enhancement of initial brightness of afterglow”.This dynamic process was illustrated via the use of a rate equation approach,where the electrons trapped by the ultra-shallow trap at 0.022 eV could be transferred through the conduction band during long *** afterglow intensity could reach 0.538 cdm^(-2)at a 6 V electric *** design of an electric field stimulation technique enables the enhancement of the intensity of PersLMs and provides a new perspective for exploring the fundamental mechanics of certain established PersLMs.

关键词： spectroscopy luminescence conduction

Resource allocation optimization of equipment development task based on MOPSO algorithm

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Journal of Systems Engineering and Electronics 2019年第6期30卷 1132-1143页

作者： ZHANG xilin TAN Yuejin and YANG Zhiwei College of Systems Engineering National University of Defense TechnologyChangsha 410073China Business School Jiangsu Normal UniversityXuzhou 221116China

Resource allocation for an equipment development task is a complex process owing to the inherent characteristics,such as large amounts of input resources,numerous sub-tasks,complex network structures,and high degrees of *** paper presents an investigation into the influence of resource allocation on the duration and cost of *** models are constructed for the relationships of the resource allocation quantity with the duration and cost of the *** considering the uncertainties,such as fluctuations in the sub-task duration and cost,rework iterations,and random overlaps,the tasks are simulated for various resource allocation *** shortest duration and the minimum cost of the development task are first formulated as the objective *** on a multi-objective particle swarm optimization(MOPSO)algorithm,a multi-objective evolutionary algorithm is constructed to optimize the resource allocation scheme for the development ***,an uninhabited aerial vehicle(UAV)is considered as an example of a development task to test the algorithm,and the optimization results of this method are compared with those based on non-dominated sorting genetic algorithm-II(NSGA-II),non-dominated sorting differential evolution(NSDE)and strength pareto evolutionary algorithm-II(SPEA-II).The proposed method is verified for its scientific approach and *** case study shows that the optimization of the resource allocation can greatly aid in shortening the duration of the development task and reducing its cost effectively.

关键词： resource allocation equipment development task multi-objective particle swarm optimization(MOPSO) develop ment task simulation.

Interplay of surface geometry and vorticity dynamics in incompressible flows on curved surfaces

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Applied Mathematics and Mechanics(English Edition) 2017年第9期38卷 1191-1212页

作者： Qian SHI Yu CHEN xilin XIE Department of Aeronautics and Astronautics Fudan UniversityShanghai 200433China

Incompressible viscous flows on curved surfaces are considered with respect to the interplay of surface geometry, curvature, and vorticity dynamics. Free flows and cylindrical wakes over a Gaussian bump are numerically solved using a surface vorticity- stream function formulation. Numerical simulations show that the Gaussian curvature can generate vorticity, and non-uniformity of the Gaussian curvature is the main cause. In the cylindrical wake, the bump dominated by the positive Gaussian curvature can significantly affect the vortex street by forming velocity depression and changing vorticity transport. The results may provide possibilities for manipulating surface flows through local change in the surface geometry.

关键词： two-dimensional flow vorticity dynamics incompressible viscous curvature

The low-latitude sodium layer:comparative data from lidar observations at Hainan,China and São Paulo,Brazil

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Earth and Planetary Physics 2025年第1期9卷 39-53页

作者： fang Wu Jing Jiao GuoTao Yang Lifang Du ZhengKuan Liu HaoRan Zheng JiXin Guo ShaoHua Gong YaJun Zhu State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China Hainan National Field Science Observation and Research Observatory for Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China China-Brazil Joint Laboratory for Space Weather NSSC/INPESão Josédos Campos 12227-010Brazil School of Physics and Electronics Engineering Hainan Normal UniversityHaikou 571158China

Physical and chemical processes observed in the mesosphere and thermosphere above the Earth’s low latitudes are complex and highly interrelated to activity in the low-latitude *** sodium detected by lidar can yield clues to dynamic and chemical processes in these spatial layers above the Earth’s *** paper is based on sodium layer data collected at two low-latitude stations,one in the northern hemisphere and one in the *** low-latitude sodium layer exhibits conspicuous seasonal variations in shape,density,and altitude;these variations are similar between Earth’s hemispheres:sodium layer density at both stations reaches its seasonal maximum in autumn and minimum in ***,maximal Na density over Brazil is greater than that over *** variations of Na density above the two low-latitude stations are also similar;at both,maxima are observed before *** variations of the Na layer over Brazil that differ from those observed in the northern hemisphere may be related to the South Atlantic Magnetic Anomaly(SAMA)or fountain *** suggest that low-latitude Na layer data may provide useful additional evidence that could significantly improve the low-latitude part of the WACCM-Na model.

关键词： metallic sodium layer seasonal variation nocturnal variation lidar