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Carbonatites in China:A review for genesis and mineralization

Geoscience Frontiers 2010年第1期1卷 105-114页

作者： Cheng Xu linjun wang Wenlei Song Min Wu Laboratory of Orogenic Belts and Crustal Evolution Peking University Beijing 100871 China Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Graduate School Chinese Academy of Sciences Beijing 100039 China

Carbonatites are commonly related to the accumulation of economically valuable substances such as REE, Cu, and P. The debate over the origin of carbonatites and their relationship to associated silicate rocks has been ongoing for about 45 years, Worldwide, the rocks characteristically display more geochemical enrichments in Ba, Sr and REE than sedimentary carbonate rocks. However, carbonatite＇s geochemical features are disputed because of secondary mineral effects. Rock-forming carbonates from carbonatites at Qinling, Panxi region, and Bayan Obo in China show REE distribution patterns ranging from LREE enrichment to flat patterns. They are characterized by a Sr content more than 10 times higher than that of secondary carbonates. The coarse- and fine-grained dolomites from Bayan Obo H8 dolomite marbles also show similar high Sr abundance, indicating that they are of igneous origin. Some carbonates in Chinese carbonatites show REE （especially HREE） contents and distribution patterns similar to those of the whole rocks. These intrusive carbonatites display lower platinum group elements and stronger fractionation between Pt and lr relative to high-Si extrusive carbonatite. This indicates that most intrusive carbonatites may be carbonate cumulates. Maoniuping and Daluxiang in Panxi region are large REE deposits. Hydrothermal fluorite ore veins occur outside of the carbonatite bodies and are emplaced in wallrock syenite. The fluorite in Maoniuping has Sr and Nd isotopes similar to carbonatite. The Daluxiang fluorite shows Sr and REE compositions different from those in Maoniuping. The difference is reflected by both the carbonatites and rock-forming carbonates, indicating that REE mineralization is related to carbonatites. The cumulate processes of carbonate minerals make fractionated fluids rich in volatiles and LREE as a result of low partition coefficients for REE between carbonate and carbonatite melt and an increase from LREE to HREE. The carbonatite-derived fluid ha

关键词： Carbonatite Carbonatite parentalmagmas Carbonate cumulates Carbonatite-expelled fluid REE mineralization

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新工科背景下地方高校应用型土木人才培养探索与实践

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创新创业理论研究与实践 2024年第15期7卷 130-133页

作者：杨想红王林均冯健雪吴琴贵州民族大学建筑工程学院贵州贵阳550025

地方高校土木工程专业应根据其人才培养定位及肩负任务的实际情况,确定适应产业转型升级及新工科建设需求的人才培养模式,以提高所培养的土木工程专业人才的竞争力。该文通过对土木工程专业人才培养现状的分析,构建了基于校企协同育人... 详细信息

地方高校土木工程专业应根据其人才培养定位及肩负任务的实际情况,确定适应产业转型升级及新工科建设需求的人才培养模式,以提高所培养的土木工程专业人才的竞争力。该文通过对土木工程专业人才培养现状的分析,构建了基于校企协同育人模式的人才培养机制,通过多方协同、结合行业需求和发展趋势,构建了基于新工科的应用型土木工程专业人才培养模式。通过实践检验,人才培养模式对土木工程专业应用型人才培养的促进作用显著,极大地降低了用人单位人才再教育成本,提升了人才培养质量。

关键词：新工科土木工程协同育人地方高校人才培养课程体系

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Enhanced bright green luminescence from GdOF:Ho^(3+) up-conversion phosphor via Yb^(3+) doping

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Journal of Rare Earths 2024年第2期42卷 263-269,I0002页

作者： linjun Qin Yue Guo Jing Xu Lixi wang Qitu Zhang College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China

In this paper,a series of GdOF-based green phosphors doped with Ho^(3+) and Yb^(3+) ions was prepared by a simple co-precipitation *** crystal structure s and optical prope rties were investigated in *** intensity of the emission of GdOF:Yb^(3+),Ho^(3+) phosphors is enhanced by the effective energy transfer from Yb^(3+) to Ho^(3+),and the optimal luminescence is achieved with the Ho^(3+)doping amount of 0.1 mol%as well as Yb^(3+) doping amount of 5 mol%.Tunable UC emission of samples is achieved by adjusting the doping concentration of Ho^(3+) or Yb^(3+).The purity of the green UC emission is further improved by enhancing the excitation pumping *** addition,logarithmic functions of green,red and nearinfrared radiation intensities were calculated versus logarithmic function of pump power for further study.A possible UC luminescence mechanism between Yb^(3+) and Ho^(3+) is discussed based on powerdependent UC luminescence spectrum and decay *** results suggest that GdOF:Yb^(3+),Ho^(3+)phosphors with bright and high-purity green UC emission have potential applications in the fields of bioimaging,display and illumination.

关键词： Up-conversion GdOF Lanthanide ions Rare earths

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Preparation and Application of Bauxite-based Sintered Mullite Homogenized Grog in Ladle Castable

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China's Refractories 2016年第4期25卷 18-22页

作者： AN Jiancheng GAO Changhe wang Yali CHEN Chaoqun wang linjun Tongda Refractory Technologies Co. Ltd. Yangquan Jinyu Tongda High-temperature Materials Co. Ltd.

Preparation of bauxite-based sintered mullite homogenized grog was introduced and its application in ladle castable was *** kinds of bauxite-based sintered mullite homogenized grogs were used,named as GA and GB,*** results show that bauxitebased sintered homogenized grog with uniform components,stable microstructure and mullite as main crystal phase can be prepared using joint process of three-step homogenization,automatic component batching,wet cogrinding,high-temperature *** also indicates that carbon steel ladle castables with GA or composite aggregate of GA and GB as main materials have the same excellent general performance indicators,great erosion resistance,anti-strip performance and longer service life in field applications,and compared with castables with single aggregate of GA,the castables with aggregate of GA and GB as main materials had higher cost performance because of lower bulk density of GB.

关键词： mullite aggregate bauxite sintered alumina longer compressive controllable homogenization advantageous

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Unbiased Fuzzy Global Optimization of Morse Clusters with Short-Range Potential for N≤400

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Chinese Journal of Chemical Physics 2021年第6期34卷 896-904,I0004,I0005,I0094-I0157页

作者： Liping Chen linjun wang Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231China Key Laboratory of Excited-State Materials of Zhejiang Province Zhejiang UniversityHangzhou 310027China Key Laboratory of Excited-State Materials of Zhejiang Province Department of ChemistryZhejiang UniversityHangzhou 310027China

Global optimization of Morse clusters with shortrange potential is a great ***,we apply our recently developed unbiased fuzzy global optimization method to systematically study Morse clusters with the potential rangeρ=14 and the number of atoms N up to *** the putative global minima reported in the literature have been successfully reproduced with relatively high success *** to the available results for N≤240 and several larger Morse clusters,new global minima(and local minima)with lower energies have been found out for N=164,175,188,193,194,197,239,246,260,318,and *** with magic numbers are figured out through fitting the size-dependent global minimum *** cluster structures tend to be close-packed for short-range potential with large N.

关键词： Unbiased fuzzy global optimization Morse clusters Short-range potential

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Luminescent Properties of Porous Si Passivated by Diamond Film and DLC Film

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Journal of Materials Science & Technology 2004年第2期20卷 145-148页

作者： linjun wang, Yiben XIA, Weili ZHANG, Minglong ZHANG and Weimin SHISchool of Materials Science & Engineering, Shanghai Univ., Shanghai 201800, China Sch. of Mat. Sci. and Eng. Shanghai Univ. Shanghai 201800 China

Surface passivation methods for porous Si (PS) surfaces, i.e., depositing diamond film or diamond-like carbon (DLC) film on PS surfaces, were attempted. Two emission bands, weak blue band and strong red band existed in the PL spectrum of diamond film coated on PS, were discovered by the photoluminescence measurements. The luminescent mechanism and stability were discussed. The results indicated that diamond film may stabilize the PL wavelength and intensity of PS, and therefore could become a promising passivation film of porous Si. The PL properties of PS coated by DLC films, including hydrogenated diamond like carbon (DLC:H) film and nitrogen doped DLC film (DLC:N) were also studied in this paper. The DLC films may stabilize the PL of PS, but the photoluminescent intensity was obviously weaker than that of diamond film coated PS.

关键词： Porous Si Passivation Diamond film Diamond-like carbon film

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胃癌手术质量控制数据的公布推动胃癌手术水平的提高:基于2020—2022年江苏省胃癌质量控制数据分析

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肿瘤 2024年第2期44卷 136-145页

作者：王林俊夏义文李铮李清雅张殿彩徐皓杨力宋军管文贤徐泽宽南京医科大学第一附属医院胃肿瘤中心徐州医科大学附属医院普通外科南京大学医学院附属鼓楼医院胃肠外科

目的:收集并分析2020—2022年江苏省胃癌手术质量控制的相关数据,研究胃癌手术质量控制数据的公布在推动中国胃癌手术水平提升中的作用。方法:以江苏胃癌联盟(Jiangsu Gastric Cancer Union,JSGCU)为平台,采用调查问卷的形式,在线创建... 详细信息

目的:收集并分析2020—2022年江苏省胃癌手术质量控制的相关数据,研究胃癌手术质量控制数据的公布在推动中国胃癌手术水平提升中的作用。方法:以江苏胃癌联盟(Jiangsu Gastric Cancer Union,JSGCU)为平台,采用调查问卷的形式,在线创建相关问卷后,由各联盟成员单位根据要求在线填写相关问卷内容。收集资料内容包括:医院基本情况、早期胃癌诊治、局部进展期胃癌诊治、晚期胃癌诊治、消化道重建、手术安全性以及经济学指标等。结果:连续收集并分析了2020—2022年江苏省胃癌手术质量控制的相关数据。数据分析结果显示,2020—2022年Ⅰ期胃癌患者的比例逐年上升,胃癌早筛、早诊、早治工作的成果得到了很好的体现;腹腔镜手术率逐年上升,已成为江苏省胃癌根治术的主流方式;胃癌淋巴结清扫数目≥30枚的医院比例逐年上升;不同部位的胃癌根治术后消化道重建方式的选择各有特点;胃癌腹腔镜手术Ⅲ级以上并发症的发生率略低于开放性手术,其中发生并发症患者的术后住院时间明显延长,术后住院费用也明显提高。胃癌手术中选择关闭系膜间隙的医院比例逐年上升。结论:江苏省胃癌手术质量控制数据的公布推动了中国胃癌手术水平的提高。

关键词：胃癌手术质量控制手术质量

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全机器人下根治性全胃切除+食管空肠Roux-en-Y吻合术（Overlap法）

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手术电子杂志 2024年第2期11卷 18-19页

作者：李沣员刘宏达汪未知王林俊张殿彩杨力徐泽宽徐皓南京医科大学第一附属医院胃肿瘤中心

2000年获得临床应用许可的达芬奇外科手术系统（da Vinci surgical system）作为一种创新的微创手术平台，提供了高清晰度的裸眼3 D成像功能、有效的震颤过滤技术以及高精度灵活的模拟机械臂。根据目前研究证明，达芬奇机器人手术系统... 详细信息

2000年获得临床应用许可的达芬奇外科手术系统（da Vinci surgical system）作为一种创新的微创手术平台，提供了高清晰度的裸眼3 D成像功能、有效的震颤过滤技术以及高精度灵活的模拟机械臂。根据目前研究证明，达芬奇机器人手术系统在胃癌手术治疗方面具有其安全性和可行性。灵活的机械臂，在胃周淋巴结清扫中更具优势，对周围器官的损伤更小，术后胰瘘发生率更低；缝合优势能更便利完成全机器人完全缝合重建，缩短腹腔暴露时间、减少腹腔体液丢失、降低手术对患者内环境稳态的干扰。

关键词：全机器人下根治性全胃切除 Roux-en-Y吻合术

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桩-土相互作用研究进展

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土工基础 2024年第3期38卷 453-458页

作者：萧和冯健雪马秀如张小勇王林均黄宝涛贵州民族大学建筑工程学院贵阳550025 贵州省工程地质灾害防治工程研究中心贵阳550025 广西交通投资集团有限公司南宁产530021 广西大学土木建筑工程学院南宁530004 浙江海洋大学海洋工程装备学院浙江舟山316000

桩基础具有承载力高、沉降量小等特点,在工程建设中广泛应用。桩-土界面力学特性是影响桩基础承载力与沉降变形的关键因素。工程实践中非饱和土体广泛分布,桩基础的沉降预测与承载力预估往往与理论相差甚远,非饱和土与桩相互作用的理论... 详细信息

桩基础具有承载力高、沉降量小等特点,在工程建设中广泛应用。桩-土界面力学特性是影响桩基础承载力与沉降变形的关键因素。工程实践中非饱和土体广泛分布,桩基础的沉降预测与承载力预估往往与理论相差甚远,非饱和土与桩相互作用的理论研究滞后于工程实践。系统总结了桩-土界面相互作用、桩-土间荷载传递规律、复合地基固结理论等方面的研究现状,指出目前复合地基沉降变形中的桩-土相互作用研究中存在的主要问题,为相关研究提供参考。

关键词：桩基工程非饱和土桩-土相互作用荷载传递复合地基固结

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Surface Hopping Methods for Nonadiabatic Dynamics in Extended Systems

Surface Hopping Methods for Nonadiabatic Dynamics in Extende...

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第十六届全国化学动力学会议

作者： linjun wang Department of Chemistry Zhejiang University

Due to the ease of implementation and good balance between efficiency and reliability, surface hopping has become one of the most widely used mixed quantum-classical methods for studying general charge and exciton dynamics.1 In extended systems（e.g., aggregates, polymers, surfaces, interfaces, and solids）, however, surface hopping suffers from several severe problems, and thus the relevant applications have been limited in the past years.2 Trivial crossings between uncoupled or weakly coupled states have highly peaked nonadiabatic couplings and thus are difficult to deal with in the preferred, adiabatic representation.3 Recently, we systematically classify surface crossings within a time step into four general types and proposed a parameter-free crossing corrected FSSH（CC-FSSH） method to describe the complex nonadiabatic dynamics with a high density of states.4 We further showed that a proper choice of subspace can significantly simplify the surface crossings and further increase the performance.5 Fast time step convergence and system size independence in systems with thousands of molecular sites have been achieved. In addition, we proposed a branching corrected surface hopping（BCSH） method, which resets the wavefunction coefficients based on the judgement of wave packet reflection.6 This approach ensures the self-consistency of using the traditional timedependent Schr?dinger equation for mixed quantum-classical dynamics. As benchmarked in over two hundred distinct scattering models, BCSH has captured the majority of the real decoherence effect, surpassing other existed decoherence correction algorithms. With our recent method developments, complex nonadiabatic dynamics in extended systems could be simulated with improved efficiency and reliability, thus promising for many applications in chemistry, physics, biology, and material sciences.7

关键词： nonadiabatic dynamics trajectory surface hopping extended systems crossing correction decoherence correction

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