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Subhalo Abundance and Satellite Spatial Distribution in Milky Way-Andromeda-like Paired Haloes

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Research in Astronomy and Astrophysics 2022年第12期22卷 344-352页

作者： kemeng li Shi Shao Ping He Qing Gu Jie Wang College of Physics Jilin UniversityChangchun 130012China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Center for High Energy Physics Peking UniversityBeijing 100871China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

We study the subhalo and satellite populations in haloes similar to the Milky Way(MW)-Andromeda paired configuration in the Millennium II and P-Millennium *** find subhaloes are 5%–15%more abundant in paired haloes than their isolated counterparts that have the same halo mass and large-scale environmental *** haloes tend to reside in a more isotropic environment than isolated haloes,the shear tensor of their large-scale tidal field is possibly responsible for this *** also study the thickness of the spatial distribution of the top 11 most massive satellite galaxies obtained in the semi-analytic galaxy sample constructed from the Millennium II ***,satellites that have lost their host subhaloes due to the resolution limit of the simulation have been taken into *** a result,we find that the difference in the distribution of the satellite thickness between isolated and paired haloes is indistinguishable,which suggests that the paired configuration is not responsible for the observed plane of satellites in the *** results in this study indicate the paired configuration could bring some nonnegligible effect on the subhalo abundance in the investigation of the MW's satellite problems.

关键词： galaxies:abundances galaxies:halos galaxies:structure (galaxies:)Local Group (cosmology:)dark matter methods:numerical

Timing and Tectonic Setting of the Gaoaobei TungstenMolybdenum Deposit in Nanling Range, South China

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Journal of Earth Science 2024年第3期35卷 890-904页

作者： Jianfeng li kemeng Ma Youyue Lu Jianming Fu Shunbo Cheng Yuan li Chuanbiao li College of Geographical Science Liaoning Normal UniversityDalian 116029China Wuhan Center of Geological Survey China Geological SurveyWuhan 430205China Granite Diagenesis and Mineralization Geology Research Center China Geological SurveyWuhan 430205China Mineral Resources Survey Institute of Hunan Province Changsha 410083China

The Gaoaobei tungsten-molybdenum deposit is a newly discovered large-scale quartzvein-type deposit in the Nanling metallogenic belt in South *** ore bodies are hosted in the Indosinian granites and the Cambrian Xiangnan Group slates and are controlled by NWW-oriented faults,which are obviously different from the“five-story building”model in southern Jiangxi *** magmatic rocks in the study area are dominated by medium-to coarse-grained biotite monzogranite,with a few NW-oriented fine-grained granite *** medium-to coarse-grained biotite monzogranite and fine-grained granite dykes have zircon U-Pb ages of 229.4±1.9 Ma(MSWD=1.5)and 164.9±3.3 Ma(MSWD=0.75),respectively,corresponding to the Indosinian and Yanshanian *** monzogranites have higher contents of FeO,CaO,K2O,P2O5,and TiO2,while the granite dykes have slightly higher contents of SiO2,Al2O3,MnO,and *** A/CNK values are 1.11-1.75 and 1.19-2.25,and the contents of CIPW normative corundum are 1.71%-6.66%and 2.41%-9.50%,suggesting both the monzogranites and granite dykes are S-type *** total amount of rare earth elements in the monzogranites(from 84.7 ppm to 129 ppm)is slightly lower than that in the granite dykes(from 128 ppm to 133 ppm).The Eu/Eu*values range from 0.12 to 0.30 in monzogranites and from 0.0011 to 0.0013 in granite dykes,indicating the fine-grained granites underwent more intense fractional *** monzogranite and granite dykes have high 87Sr/86Sri values of 0.7169-0.7193 and 0.72825-0.72880,lowεNd(t)values ranging from-10.2 to-9.6 and from-11.5 to-11.4,and TDM2 ages of 1835-1785 and 1957-1946 Ma,*** isotope data indicate their origin from the remelting of the Paleoproterozoic crustal *** with regional geology,it is concluded that the medium-to coarse-grained biotite monzogranite was formed in a post-collisional extensional *** addition,40Ar-39Ar dating of the greisen type tungsten-molybdenum ore gave

关键词： zircon U-Pb age 40Ar-39Ar age geochemistry tungsten molybdenum deposit Gaoaobei Nanling Range.

Review of the SiC LDMOS power device

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Journal of Semiconductors 2024年第8期45卷 4-17页

作者： Ziwei Hu Jiafei Yao Ang li Qi Sun Man li kemeng Yang Jun Zhang Jing Chen Maolin Zhang Yufeng Guo College of Integrated Circuit Science and Engineering(Industry-Education Integration School) Nanjing University of Posts andT elecommunicationsNanjing 210023China National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology Nanjing 210023China Nantong Institute of Nanjing University of Posts and Telecommunications Nantong 226000China

Silicon carbide(SiC),as a third-generation semiconductor material,possesses exceptional material properties that significantly enhance the performance of power *** SiC lateral double-diffused metal–oxide–semiconductor(LDMOS)power devices have undergone continuous optimization,resulting in an increase in breakdown voltage(BV)and ultra-low specific on-resistance(Ron,sp).This paper has summarized the structural optimizations and experimental progress of SiC LDMOS power devices,including the trench-gate technology,reduced surface field(RESURF)technology,doping technology,junction termination techniques and so *** paper is aimed at enhancing the understanding of the operational mechanisms and providing guidelines for the further development of SiC LDMOS power devices.

关键词： SiC LDMOS specific on-resistance breakdown voltage

Merging History of Massive Galaxies at 3

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Research in Astronomy and Astrophysics 2023年第1期23卷 100-107页

作者： kemeng li Zhen Jiang Ping He Qi Guo Jie Wang College of Physics Jilin UniversityChangchun 130012China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Department of Astronomy Tsinghua UniversityBeijing 100084China Center for High Energy Physics Peking UniversityBeijing 100871China

The observational data of high redshift galaxies become increasingly abundant,especially since the operation of the James Webb Space Telescope,which allows us to verify and optimize the galaxy formation model at high *** this work,we investigate the merging history of massive galaxies at 3*** can be attributed to the high fraction(>50%)of cold gas at z>*** addition,we study some special systems of massive merging galaxies at 3ling of the supermassive black hole growth at high redshifts.

关键词： galaxies evolution-galaxies formation-galaxies high-redshift-(galaxies:)quasars supermassive black holes

–C≡N functionalizing polycarbonate-based solid-state polymer electrolyte compatible to high-voltage cathodes

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Journal of Energy Chemistry 2024年第11期 422-431页

作者： Shuo Ma Yanan Zhang Donghui Zhang Yating Zhang Wenbin li kemeng Ji Zhongli Tang Mingming Chen Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin University Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University The Research Center of Chemical Engineering Tianjin University

Solid-state polymer electrolytes（SPEs） capable of withstanding high voltage are considered to be key for next-generation energy storage devices with inherent safety as well as high energy *** study involves the rational design of solid-state-C≡N functionalized P(VEC1-CEA0.3)/liTFSI@CE SPEs and its synthesis by in-situ free radical polymerization of vinyl ethylene carbonate（VEC） and 2-cyanoethyl acrylate（CEA）.In situ polymerization yields electrode/electrolyte interfaces with low interfacial resistance,forming a stable SEI layer enriched with liF,li3N,and RCOOli,ensuring stable li plating/stripping for over 1400 ***-C≡N moiety renders the αH on the adjacent αC positively charged,thereby endowing it with the capability to anchor TFSI-.Simultaneously,the incorporation of-C≡N moiety diminishes the electron-donating ability of the C=O,C-O-C,and-C≡N functional groups,facilitating not only the ion conductivity enhancement but also a more rapid li+migration proved by DFT theoretical calculations and Raman *** room temperature,tli+of 0.60 for P(VEC1-CEA0.3)/liTFSI@CE SPEs is achieved when the ionic conductivity σli+is 2.63×10-4S cm-1and the electrochemical window is expanded to5.0 *** coin cells with high-areal-loading cathodes and the 6.5-mAh pouch cell,exhibit stable charge/discharge *** 25℃,the 4.45-V li|P(VEC1-CEA0.3)/liTFSI@CE|liCoO2battery performs stable cycling over 200 cycles at 0.2 C,with a capacity retention of 82.1%.

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三种二硅酸锂玻璃陶瓷冠密合性的比较

中华口腔医学杂志 2016年第5期51卷 296-299页

作者：李柯檬艾红军伊哲中国医科大学口腔医学院修复科·辽宁省口腔医学研究所沈阳110002

目的探讨3种二硅酸锂玻璃陶瓷冠的密合性及不同制备工艺对二硅酸锂玻璃陶瓷冠密合性的影响，以期为临床提供参考。方法30颗下颌第一磨牙标准预备体代型均分为A、B、C3组（每组10颗），分别制作国产二硅酸锂玻璃陶瓷冠、IPSe-maxCAD冠、I... 详细信息

目的探讨3种二硅酸锂玻璃陶瓷冠的密合性及不同制备工艺对二硅酸锂玻璃陶瓷冠密合性的影响，以期为临床提供参考。方法30颗下颌第一磨牙标准预备体代型均分为A、B、C3组（每组10颗），分别制作国产二硅酸锂玻璃陶瓷冠、IPSe-maxCAD冠、IPSe-maxPress冠。3组全瓷冠粘接、包埋、切割后，利用激光扫描共聚焦显微镜观察冠边缘、肩台、轴面、骀面、轴面角处各测量点粘接剂厚度，即修复体密合性。结果3组各测量点粘接剂厚度总体差异均有统计学意义（P〈0．05）。A组边缘密合性最好[（46．8±9．1）μm]；B组肩台[（59．3±7．9）μm]、轴面[（50．5±3．6）μm）]和验面[（87．6±11．6）μm]密合性最好；C组轴面角[（84．4±10．1）μm]密合性最好。除轴面角外，A、B组各测量点粘接剂厚度均显著小于C组（P〈0．05）。结论3种二硅酸锂玻璃陶瓷均可满足临床全冠的密合性要求。

关键词：计算机辅助设计牙科铸造技术牙冠(假体) 二硅酸锂

Additives strategies to improving cycling stability of li metal batteries by modifying electrode electrolyte interphases

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Progress in Natural Science:Materials International 2024年第2期34卷 338-344页

作者： Yuan li Pengfei Huang Chunyu Cui Xiaoyuan Ma li Chen Zekun li linhai li Yuhong Tian School of Biological and Chemical Engineering Guangxi University of Science and Technology School of College of Chemistry and Chemical Engineering Hunan University Isky Future Energy Institute

li metal batteries（LMBs） have attracted much attention due to the ultra-high theoretical capacity of the li metal anode（LMA）.However,the uncontrollable dendrites growth and low coulombic efficiency hinder their practical ***,we explore 3,5-difluoropyridine（2F-BD） as a novel electrolyte additive to enable highperformance *** 2F-BD additive participates in and modifies the solvation structure of li ions by reducing the coordinated number of PF6-at the electrode surface,leading to the formation of a liF and li3N-rich solid electrolyte interphase（SEI）.The liF component increases the robustness of SEI and suppresses the formation of li dendrites,while the li3N component facilitates the transportation and reaction kinetics of li *** a result,the li‖li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA *** coupling with liFePO4cathode,the obtained full cell achieves high specific capacities of 106.06 mA h g-1and 84.98 mA h g-1at 2.55 mA cm-2and 5.10 mA cm-2,respectively,and maintains a high capacity retention of84.0% after 1000 cycles at 0.13 mA cm-2,with an average cycling CE of 99.58%.

关键词： li metal batteries li dendrites Electrolyte additive liF and li3N-Rich electrode-electrolyte interphase liFePO4 cathode

Leaching kinetics of fluorine during the aluminum removal from spent li-ion battery cathode materials

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Journal of Environmental Sciences 2024年第4期138卷 312-325页

作者： Shengjie li Jianxin Zhu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

The high content of aluminum(Al)impurity in the recycled cathode powder seriously affects the extraction efficiency of Nickel,Cobalt,Manganese,and lithium resources and the actual commercial value of recycled materials,so Al removal is crucially important to conform to the industrial standard of spent li-ion battery cathode *** this work,we systematically investigated the leaching process and optimum conditions associated with Al removal from the cathode powder materials collected in a wet cathode-powder peeling and recycling production line of spent li-ion batteries(liBs).Moreover,we specifically studied the leaching of fluorine(F)synergistically happened along with the removal process of Al,which was not concerned about in other studies,but one of the key factors affecting pollution prevention in the recovery *** mechanism of the whole process including the leaching of Al and F from the cathode powder was indicated by using NMR,FTIR,and XPS,and a defluoridation process was preliminarily investigated in this *** leaching kinetics of Al could be successfully described by the shrinking core model,controlled by the diffusion process and the activation energy was 11.14 kJ/***,the leaching of F was attributed to the dissolution of liPF6and decomposition of PVDF,and the kinetics associated was described by Avrami *** interaction of Al and F is advantageous to realize the defluoridation to some *** is expected that our investigation will provide theoretical support for the large-scale recycling of spent liBs.

关键词： Al removal F leaching Cathode powder Heating alkali leaching Leaching kinetics

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朗诵艺术与播音员、主持人

电影评介 2010年第14期 78-80页

作者：李克萌广播电影电视管理干部学院

随着中国广播电视节目的发展日新月异,在节目当中起导航任务的主持人也日渐成为广播电视这个大舞台上最耀眼的明星。但是,主持人在摸索中成长的过程中,对于语言艺术功底和文化底蕴的缺失不容忽视。而朗诵艺术则是对这两方面最佳的训练方... 详细信息

随着中国广播电视节目的发展日新月异,在节目当中起导航任务的主持人也日渐成为广播电视这个大舞台上最耀眼的明星。但是,主持人在摸索中成长的过程中,对于语言艺术功底和文化底蕴的缺失不容忽视。而朗诵艺术则是对这两方面最佳的训练方法,朗诵艺术本身也是弘扬文化的重要艺术形式,播音员、主持人作为语言艺术工作者也有这样的义务来弘扬朗诵艺术。

关键词：朗诵艺术语言艺术功底文化底蕴