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Antimony fluoride(SbF_(3)):A potent hole suppressor for tin(II)-halide perovskite devices

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InfoMat 2023年第1期5卷 106-113页

作者： ao Liu Huihui Zhu Soonhyo Kim Youjin Reo yong-Sung Kim Sai Bai yong-Young Noh Department of Chemical Engineering Pohang University of Science and TechnologyPohangRepublic of Korea Korea Research Institute of Standards and Science DaejeonRepublic of Korea Department of Nano Science University of Science and TechnologyDaejeonRepublic of Korea Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengduPeople's Republic of China

Tin(Sn^(2+))-based halide perovskites have been developed as the most prom-ising alternatives to their toxic Pb-based counterparts in optoelectronic ***,the facile tin vacancy formation and easy oxidization characteristics make Sn^(2+)-based perovskites highly p-doped with excessive hole concentrations,which significantly hinder their ***,we demonstrate a potent hole inhibitor of antimony fluoride(SbF_(3)),which possesses a higher hole-suppression capability than conventional tin fluo-ride(SnF_(2)).A small amount of SbF_(3) allows a wide range of hole-density modulation with no or less SnF_(2) addition,thus mitigating the negative effects of using only SnF_(2).A SnF_(2)/SbF_(3) co-additive approach was further developed to achieve high-performance Sn 2+perovskite thin-film transis-tors operated in the enhancement mode with a five-fold enhancement of the field-effect mobility and improved operational stability compared to using only SnF_(2).We expect that the SbF 3 hole suppressor and co-additive approach can provide opportunities for the development of high-efficiency Sn^(2+)-perovskite optoelectronic devices.

关键词： electrical characterization hole suppressor thin-film transistor tin-based halide perovskite

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大方坯中间包控流装置及冶金效果的研究

南方金属 2024年第2期 26-29页

作者：孙忠权敖永明曾令宇宝武集团中南钢铁广东中南钢铁股份有限公司广东韶关512123

以某炼钢厂五流大方坯连铸中间包为研究对象,采用数值模拟方法,研究不同控流装置及操作参数下的中间包内钢液流动特性。研究结果表明,设计结构合理的湍流器、挡墙和挡坝组合的中间包结构,对钢液流动状态具有重要影响,可延长中间包内钢... 详细信息

以某炼钢厂五流大方坯连铸中间包为研究对象,采用数值模拟方法,研究不同控流装置及操作参数下的中间包内钢液流动特性。研究结果表明,设计结构合理的湍流器、挡墙和挡坝组合的中间包结构,对钢液流动状态具有重要影响,可延长中间包内钢液停留时间,达到去除夹杂物和均匀各流钢水温度的冶金效果。优化后的中间包结构能够更好地满足高品质特钢质量的要求。

关键词：大方坯连铸五流中间包湍流器数值模拟结构优化

未来气候变化情景下的中国种子植物受威胁等级评估

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中国科学：生命科学 2024年第4期54卷 751-765页

作者：孟佳慧崔宇罗奥杨永覃海宁马克平方精云王志恒北京大学城市与环境学院生态研究中心北京100871 南京林业大学生命科学学院南京210037 中国科学院植物研究所北京100093

未来气候变化是全球生物多样性面临的重要威胁之一,给全球生物多样性维持和生态系统稳定带来了巨大挑战.为降低生物灭绝风险并维持生态系统稳定,优先保护受威胁物种成为全球生物多样性保护的共识,而完善的受威胁物种名录对生物多样性保... 详细信息

未来气候变化是全球生物多样性面临的重要威胁之一,给全球生物多样性维持和生态系统稳定带来了巨大挑战.为降低生物灭绝风险并维持生态系统稳定,优先保护受威胁物种成为全球生物多样性保护的共识,而完善的受威胁物种名录对生物多样性保护有基石意义.本研究基于28450种中国种子植物(约占中国种子总数的82.3%)的10 km×10 km分布数据,通过物种分布模型预测了这些物种的未来分布区并计算了其未来分布区面积的变化;进而基于IUCN红色名录A3c的判断标准,评估了受未来气候变化情景下的种子植物受威胁等级;整合本文的评估结果和现有受威胁物种名录,提出了新的中国种子植物受威胁等级和名录.更新后的受威胁名录共包含34550种中国种子植物(约为现有全部中国种子植物).在3种未来气候变化情景(SSP126,SSP245和SSP585)和3种物种扩散情景(完全扩散、每10年扩散20 km和不扩散)下,受威胁种子植物数量为4444~11467种,占中国种子植物总数的12.9%~33.2%;其中木本植物1878~4330种,占全部木本植物总数的14.8~34.1%.草本植物2566~7137种,占全部草本植物总数的11.7~32.7%;数据缺乏物种2962~3915种,占中国种子植物总数的8.5%~11.3%.本研究定量评估了种子植物受未来气候变化威胁的可能性,更新了现有种子植物受威胁物种名录,为中国植物多样性保护规划提供了重要的本底资料.

关键词：物种分布模型 IUCN红色名录数据降尺度草本植物木本植物

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儿童Hunter综合征1例

中国临床医学影像杂志 2024年第7期35卷 519-520页

作者：谭品谢娟娟龙湘党敖琨张萍袁勇华湖南师范大学附属第一医院(湖南省人民医院) 湖南长沙410005

病例男,6岁,因“发现心脏杂音半年余”入院。患儿系G1P1,为试管婴儿,足月顺产,无产伤窒息史,出生体质量3.6 kg,Apgar评分不详。既往无特殊病史。父母既往体健,否认近亲婚配,否认类似病史及家族遗传病史。查体:体温36.8℃,心率100次/分,... 详细信息

病例男,6岁,因“发现心脏杂音半年余”入院。患儿系G1P1,为试管婴儿,足月顺产,无产伤窒息史,出生体质量3.6 kg,Apgar评分不详。既往无特殊病史。父母既往体健,否认近亲婚配,否认类似病史及家族遗传病史。查体:体温36.8℃,心率100次/分,呼吸20次/分,血压98/63 mm Hg(1 mm Hg≈0.133 k Pa),身高109 cm(P3-10),体质量18.8 kg(P3-10).

关键词：黏多糖累积病Ⅱ型儿童超声心动描记术磁共振成像

Mean-field type forward-backward doubly stochastic differential equations and related stochastic differential games

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Frontiers of Mathematics in China 2020年第6期15卷 1307-1326页

作者： Qingfeng ZHU Lijiao SU Fuguo LIU Yufeng SHI yong’ao SHEN Shuyang WANG School of Mathematics and Quantitative Economics Shandong University of Finance and Economicsand Shandong Key Laboratory of Blockchain FinanceJinan 250014China Institute for Financial Studies and School of Mathematics Shandong UniversityJinan 250100China Department of Mathematics Changji UniversityChangji 831100China School of Informatics Xiamen UniversityXiamen 361005China

We study a kind of partial information non-zero sum differential games of mean-field backward doubly stochastic differential equations,in which the coefficient contains not only the state process but also its marginal distribution,and the cost functional is also of mean-field *** is required that the control is adapted to a sub-filtration of the filtration generated by the underlying Brownian *** establish a necessary condition in the form of maximum principle and a verification theorem,which is a sufficient condition for Nash equilibrium *** use the theoretical results to deal with a partial information linear-quadratic(LQ)game,and obtain the unique Nash equilibrium point for our LQ game problem by virtue of the unique solvability of mean-field forward-backward doubly stochastic differential equation.

关键词： Non-zero sum stochastic differential game mean field backward doubly stochastic differential equation(BDSDE) Nash equilibrium point maximum principle

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图模互补:知识图谱与大模型融合综述

武汉大学学报（理学版） 2024年第4期70卷 397-412页

作者：黄勃吴申奥王文广杨勇刘进张振华陈南希杨洪山上海工程技术大学电子电气工程学院上海201620 达观数据有限公司上海201203 上海宝信软件股份有限公司上海201203 武汉大学计算机学院湖北武汉430072 中国科学院上海微系统与信息技术研究所上海200050 星环信息科技(上海)股份有限公司上海200233

大模型(LLM)的兴起在自然语言处理领域引起了广泛关注,其涌现能力在各个垂直领域(如金融、医疗、教育等)也取得一定进展。然而,大模型自身面临解释性不足、知识实时性差、生成结果存在虚假信息等诸多挑战。为了应对这些问题,知识图谱与... 详细信息

大模型(LLM)的兴起在自然语言处理领域引起了广泛关注,其涌现能力在各个垂直领域(如金融、医疗、教育等)也取得一定进展。然而,大模型自身面临解释性不足、知识实时性差、生成结果存在虚假信息等诸多挑战。为了应对这些问题,知识图谱与大模型的融合逐渐成为了研究热点。知识图谱作为一种结构化的知识模型,其真实性和可靠性,成为提高大模型解释和推理能力的有力工具。同时大模型具备语义理解能力,为知识图谱的构建和更新提供了有力支持。因此,知识图谱和大模型是互补的(本文称为图模互补)。本文系统性地介绍知识图谱与大模型融合的方法,分别从1)大模型增强知识图谱,2)知识图谱增强大模型两个角度进行全面回顾和分析。最后,本文从医学诊断预测和时间知识图谱出发,介绍图模互补的领域应用,并讨论图模互补未来发展的方向,为知识图谱与大模型的进一步研究提供帮助。

关键词：大模型知识图谱自然语言处理

Segregation enabled outstanding combination of mechanical and corrosion properties in a FeCrNi medium entropy alloy manufactured by selective laser melting

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Journal of Materials Science & Technology 2022年第4期99卷 207-214页

作者： Heng Duan Bin Liu ao Fu Junyang He Tao Yang C.T.Liu yong Liu State Key Lab of Powder Metallurgy Central South UniversityChangsha 410083China Max-Planck-Institut für Eisenforschung Max-Planck-βe 1Düsseldorf 40237Germany Department of Materials Science and Engineering City University of Hong KongHong KongChina Department of Mechanical Engineering City University of Hong KongHong KongChina

Selective laser melting(SLM)has the advantage in preparing supersaturated solid solutions due to its unique thermal field and high solidification *** this study,a face-centered cubic single-phase FeCrNi medium entropy alloy(MEA)with an ultrahigh Cr content(~35 at.%)was additively manufactured by *** as-built MEA shows a hierarchical microstructure of coarse columnar grains and submicron dislocation cell structures,where the cell boundaries are probed segregated with Cr and C and decorated with nano *** appearance of these dislocation barriers results in an excellent combination of strength(σ_(0.2)=745 MPa,σ_(UTS)=1007 MPa)and ductility(ε_(f)=31%).The current MEA also shows a superb corrosion resistance with a corrosion current density of 0.06μA cm^(−2) in 3.5 wt.%NaCl solution,which is far lower than that of 316 *** high content of solutioned Cr in the MEA ensures sufficient Cr supply to form an integrated Cr_(2)O_(3) passive film,and the large number of cell boundaries acting as the diffusion channels lead to the fast formation of a stable passive film over the alloy surface.

关键词： Selective laser melting Microsegregation Strength Ductility Corrosion resistance

High-temperature Electric Properties of Polycrystalline La-doped CaMnO_3 Ceramics

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Journal of Materials Science & Technology 2009年第4期25卷 535-538页

作者： Jinle Lan Yuanhua Lin ao Mei Cewen Nan yong Liu Boping Zhang Jingfeng Li State Key Laboratory of New Ceramics and Fine Processing Department of Materials Science and Engineering Tsinghua University Beijing 100084 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Polycrystalline La-doped CaMnO3 ceramics have been prepared by a solid-state sintering method. Analysis of microstructure and phase composition indicates that the addition of La can prohibit the further growth of grain, and no impurity phase appears. The results revealed that the La doping can lead to a large change of the activation energy （from 0.2：2 to 0.02 eV）, and thus result in a marked increase in electric conductivity of 2-4 orders of magnitude. The power factor can reach about 1.5×10-4 W.m-1.K-2 in a wide temperature range, which potentially make them attractive for n-type high-temperature thermoelectric materials.

关键词： CaMn03 Thermoelectric Activation energy Seebeck coefficient

An Efficient Synthetic Method of 11,12-Dihydroxyl Eudesmanolide Sesquiterpenoid from a -Santonin

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Chinese Chemical Letters 2001年第1期12卷 21-24页

作者： Wu Jiong xIA De Run LI yong Qiang TU ao Cheng Cao Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000 Institute of Plant Protection Chinese Academy of Agricultural SciencesBeijing 100094

A short and efficient procedure for introduction of tertiary hydroxyl to C-11 of eudesmanolide based on the rearrangement-oxidation of the exocylic double bond has been developed, which is synthetically valuable for a... 详细信息

关键词： Introduction tertiary hydroxyl rearrangement-oxidation