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新型电压自均衡开关电容多电平逆变器

电机与控制学报 2024年第3期28卷 157-168页

作者：李宋邵云鹏叶满园陈银波刘文芳邢瑞新喻生铭华东交通大学电气与自动化工程学院江西南昌330013

为了使用更少的器件实现更多的输出电平,同时解决传统多电平逆变器开关器件在高电压下工作时,其电压应力较大,容易损坏的问题,提出一种新型单电源开关电容多电平逆变器拓扑。该开关电容逆变器拓扑通过研究开关电容技术与级联H桥逆变器... 详细信息

为了使用更少的器件实现更多的输出电平,同时解决传统多电平逆变器开关器件在高电压下工作时,其电压应力较大,容易损坏的问题,提出一种新型单电源开关电容多电平逆变器拓扑。该开关电容逆变器拓扑通过研究开关电容技术与级联H桥逆变器的结合,采用脉宽调制的方式经过逻辑组合进行调制,实现了高效的电压增益和电平输出。在保证电容电压自均衡的前提下,仅使用单个直流电源输入,产生三倍电压增益的七电平输出。然后,为了进一步拓展该逆变器的应用范围,介绍所提逆变器的扩展结构,并简要分析其工作模式。同时与其他类似拓扑进行对比,证明该拓扑优势。最后为了验证理论分析的正确性,设计了仿真和实验样机,对逆变器的性能进行了详细测试。

关键词：开关电容单输入基本单元电压应力电容电压自均衡

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Construction of LiCl/LiF/LiZn hybrid SEI interface achieving high-performance sulfide-based all-solid-state lithium metal batteries

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Science China Chemistry 2024年第6期67卷 1990-2001页

作者： Chaochao Wei Yujie Xiao Zhongkai Wu chen Liu Qiyue Luo Ziling Jiang Lin Li Liang Ming Jie Yang Shijie cheng Chuang Yu State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan430074China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan430074China

Sulfide-based all-solid-state lithium metal batteries(ASSLMBs)have received extensive attention due to their high energy density and high safety,while the poor interface stability between sulfide electrolyte and lithium metal anode limits their ***,a hybrid SEI(LICl/Li F/Li Zn)was constructed at the interface between Li_(5.5)PS_(4.5)Cl_(1.5)sulfide electrolyte and lithium *** Li Cl and Li F interface phases with high interface energy effectively induce the uniform deposition of Li^(+)and reduce the overpotential of Li^(+)deposition,while the Li Zn alloy interface phase accelerates the diffusion of lithium *** synergistic effect of the above functional interface phases inhibits the growth of lithium dendrites and stabilizes the interface between the sulfide electrolyte and lithium *** hybrid SEI strategy exhibits excellent electrochemical performance on symmetric batteries and all-solid-state *** symmetrical cell exhibits stable cycling performance over long duration over 500 h at 1.0 mA cm^(-2).Moreover,the LiNbO_(3)@NCM712/Li_(5.5)PS_(4.5)Cl_(1.5)/Li-10%Zn F_(2)battery exhibits excellent cycle stability at a high rate of 0.5 C,with a capacity retention rate of 76.4%after 350 cycles.

关键词： argyrodite electrolytes ASSLMBs electrochemical stability Li-ZnF_2 anode electrochemical performance

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干旱胁迫对西克刺桐花芽分化的生理特性影响

亚热带植物科学 2024年第2期53卷 113-119页

作者：刘贝宁陈发兴福建农林大学戴尔豪西大学联合学院(国际学院) 福建福州350002 福建农林大学园艺学院福建福州350002

为了研究干旱胁迫诱导西克刺桐Erythrina sykesii花芽分化的生理特性,以其8年生植株为材料,测定干旱胁迫下叶片光合色素、可溶性糖、丙二醛、内源激素含量和超氧化物歧化酶、过氧化物酶活性等生理指标,分析西克刺桐对干旱胁迫的生理响... 详细信息

为了研究干旱胁迫诱导西克刺桐Erythrina sykesii花芽分化的生理特性,以其8年生植株为材料,测定干旱胁迫下叶片光合色素、可溶性糖、丙二醛、内源激素含量和超氧化物歧化酶、过氧化物酶活性等生理指标,分析西克刺桐对干旱胁迫的生理响应及其成花诱导特性。结果表明,随着干旱胁迫程度增加,西克刺桐叶片光合色素、抗氧化酶活性和内源激素含量均呈先增后降的变化趋势;轻度干旱胁迫时叶片叶绿素和类胡萝卜素、淀粉、可溶性糖、IAA、GA3和ZR含量达到最大值;中度干旱胁迫时SOD、POD和CAT活性,可溶性蛋白含量达到最大值;丙二醛、ABA含量和碳氮比均随着干旱胁迫程度增加而显著增加。以上生理指标变化表明,干旱胁迫下西克刺桐枝条成花率显著提高,其中中度胁迫效果最明显。西克刺桐在中度干旱胁迫下提高ABA含量和抗氧化酶活性,缓解植株的细胞损伤;同时提高可溶性蛋白合成和碳氮比,促进植株花芽分化,提高枝条成花率。

关键词：刺桐干旱胁迫花芽分化生理特性

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ZIF-8 coated gold nanospheres: A multi-responsive drug delivery system promoting the killing effect of photothermal therapy against osteosarcoma cells

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Nano Research 2024年第3期17卷 1772-1784页

作者： Miao Lei Weiye Cai Luetao Zou Bin Yu Lin chen Yang Cao Shanlin Xiang Chao Song Jiandu Lei Wei Jiang Zhenming Hu Department of Orthopedics Orthopedic Laboratory of Chongqing Medical UniversityThe First Affiliated Hospital of Chongqing Medical UniversityNo.1 Youyi RoadChongqing 400010China The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University Luzhou 646699China Department of Orthopedics The Third Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China Department of Radiology The First Affiliated Hospital of Chongqing Medical UniversityNo.1 Youyi RoadChongqing 400010China Department of Orthopedics Chongqing University Three Gorges HospitalChongqing 404000China Department of Geriatrics The Affiliated Hospital of Guizhou Medical UniversityGuiyang 550025China Beijing Key Laboratory of Lignocellulosic Chemistry College of Material Science and TechnologyBeijing Forestry UniversityBeijing 100083China

Photothermal therapy(PTT)has been widely used in the treatment of tumors,but its efficacy is greatly limited by the inability of precise drug delivery and the increase of heat shock proteins(HSPs)caused by high *** article describes a therapeutic strategy to enhance PTT with starvation therapy in conjunction with ferroptosis mechanism.A nanoparticle platform ZIF-8@GA was constructed by wrapping together glucose oxidase(GOX)and gold nanospheres(AuNPs)loaded with dihydroartemisinin(DHA)with zeolitic imidazolate framework-8(ZIF-8).This platform can take advantage of the micro-environment of osteosarcoma(OS)cells,featuring low pH and high reactive oxygen species(ROS),for precision drug *** can effectively catalyze glucose to produce gluconic acid and H_(2)O_(2),and DHA can also induce ROS production in OS *** produced by GOX and DHA can further generate lipid peroxidation(LPO)and lead to ferroptosis of OS *** the same time,ROS and LPO produced can inhibit the expression of HSPs,thereby increasing the therapeutic effect of *** vitro experiments show that the nanoparticles are pH and ROS responsive.1μg/mL GOX combined with 0.2μg/mL DHA promotes ferroptosis of OS cells,and increases the killing effect of near-infrared(NIR)on OS *** in vivo experiments showed that the nano drug-delivery platform combined with PTT can effectively inhibit the growth of OS ***,this study provides a new idea for the treatment of OS with biomaterials combined with various treatment methods.

关键词： zeolitic imidazolate framework-8(ZIF-8) gold nanospheres(AuNPs) photothermal therapy(PTT) starvation therapy ferroptosis

Fabrication of patterned transparent conductive glass via laser metal transfer for efficient electrical heating and antibacteria

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Nano Research 2024年第3期17卷 1578-1584页

作者： Xiaoyan Liu Ting Zhang Mengchen Xu Yang Li Haiqing Wang Yuke chen Xuzihan Zhang Zenan Wang Xiaoyan Li Weijia Zhou Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) School of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China School of Physics and Technology University of JinanJinan 250024China Department of Endodontics School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationJinan 250012China School of Information Science and Engineering University of JinanJinan 250022China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

Vapor deposition and three-dimensional(3D)printing technology are considered to be conventional methods to achieve patterned metal film preparation through the assistance of masks and high ***,there are still some challenges in fabricating metal films in template-free and normal temperature *** this work,we report a flexible and rapid laser metal transfer(LMT)technique for fabricating the various metal films(Cu,Ni,Sn,Al,Fe,and Ag)with different patterns without templates on arbitrary substrates(glass,polyimide(PI)films,and aluminum nitride(AlN)ceramic).Especially,the obtained transparent conductive glass displays high transmittance(more than 90%)and adjustable resistances(≈5Ω).According to the Joule effect,the interface resistance between Cu particles and copper oxide coating produces the high temperature approximately 280℃ at 2 V in a short time(≈60 s)and remains stable at 120℃ over 12 *** last,the multifunctional glass with Cu patterns also shows excellent bactericidal activity(≈95%).This work demonstrates that laser metal transfer is an exceeding effective means of fabricating the micro/nano structures with potential applications in functional devices.

关键词： laser metal transfer(LMT) transparent conductive glass electrical heating copper pattern antibacterial

Na_(3)P interphase reduces Na nucleation energy enabling stable anode-less sodium metal batteries

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Journal of Energy Chemistry 2024年第9期96卷 448-455页

作者： Haizhao Yang Haifeng Lv En Zhou Xiaohao Ji Chunnian chen Haolei Yu Zhaowei Sun Dawei Zhang Hongchang Jin Xianghua Kong Hengxing Ji Department of Chemistrynd Chemical Engineering Hefei University of TechnologyHefei 230009AnhuiChina Hefei National Research Center for Physical Sciencest the Microscale School of Chemistrynd Materials ScienceUniversity of Sciencend Technology of ChinaHefei 230026AnhuiChina

Sodium metal batteries(SMBs)are rising as viable alternatives to lithium-ion systems due to their superior energy density and sodium's relative ***,SMBs face significant impediments,particularly the exceedingly high negative-to-positive capacity ratios(N/P ratios)which severely encumber energy density and hinder their practical ***,a novel nucleophilic Na_(3)P interphase on aluminum foil has been designed to significantly lower the nucleation energy barrier for sodium atom deposition,resulting in a remarkable reduction of nucleation overpotential and efficient mitigation of dendritic growth at high sodium deposition of 5 mA h cm^(−2).The interphase promotes stable cycling in anode-less SMB configurations with a low N/P ratio of 1.4 and high cathode mass loading of 11.5 mg cm^(−2),and demonstrates a substantial increase in high capacity retention of 92.4%after 500 cycles even under 1 C rate *** innovation signifies a promising leap forward in the development of high-energy-density,anode-less SMBs,offering a potential solution to the longstanding issues of cycle stability and energy efficiency.

关键词： Anode-less Phosphorus anode Nucleation buffer layer Sodium metal Dendrite-free

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大姚六苴铜矿床成矿作用及找矿标志

云南冶金 2024年第3期53卷 5-12页

作者：李星陈子聪李凯中铜矿产资源有限公司云南昆明650500 云南冶金资源股份有限公司云南昆明650000 昆明理工大学国土资源工程学院云南昆明650093

大姚六苴铜矿区位于楚雄盆地东部,是典型的砂岩型铜矿床。该矿床矿体主要赋存于下白垩统高峰寺组凹地苴段和上白垩统马头山组六苴段下亚段的灰色长石石英砂岩中。矿体多呈层状、透镜状,与地层产状一致。矿床成矿地质体为高孔隙度岩石组... 详细信息

大姚六苴铜矿区位于楚雄盆地东部,是典型的砂岩型铜矿床。该矿床矿体主要赋存于下白垩统高峰寺组凹地苴段和上白垩统马头山组六苴段下亚段的灰色长石石英砂岩中。矿体多呈层状、透镜状,与地层产状一致。矿床成矿地质体为高孔隙度岩石组合+构造+盆地流体。S-H-O同位素结果显示成矿流体主要为盆地流体。褪色化长石石英砂岩、褶皱构造+断裂构造和地球化学异常可以作为该矿床的主要找矿标志。喜山运动形成大雪山背斜,在东西向挤压应力驱动下,还原性成矿流体由深部向大雪山背斜轴部运移,沿着流体运移方向,其流体温度、压力、性质等物理化学参数不断变化,形成黄铜矿、斑铜矿和辉铜矿等硫化物。

关键词：楚雄盆地砂岩铜矿成矿模式找矿标志

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Structure-regulated fluorine-containing additives to improve the performance of perovskite solar cells

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Nano Research 2024年第7期17卷 6080-6086页

作者： Peiya chen Xiaoman Bi Hao Yan Yingjie Zhao Yihao Liu Zhuo Huang Qian Xiao Yongpeng Yang Shasha Zhang Yiqiang Zhang Yanlin Song Henan Institute of Advanced Technology College of ChemistrySchool of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Key Laboratory of Green Printing CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences(ICCAS)Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyNational Laboratory for Molecular Sciences(BNLMS)Beijing 100190China

Perovskite solar cells(PSCs)have seen remarkable progress in recent years,largely attributed to various additives that enhance both efficiency and *** these,fluorine-containing additives have garnered significant interest because of their unique hydrophobic properties,effective defect passivation,and regulation capability on the crystallization ***,a targeted structural approach to design such additives is necessary to further enhance the performance of ***,fluoroalkyl ethylene with different fluoroalkyl chain lengths(CH_(2)CH(CF_(2))nCF_(3),n=3,5,and 7)as liquid additives is used to investigate influences of fluoroalkyl chain lengths on crystallization regulation and defect *** findings indicate that optimizing the quantity of F groups plays a crucial role in regulating the electron cloud distribution within the additive *** optimization fosters strong hydrogen bonds and coordination effects with FA+and uncoordinated Pb^(2+),ultimately enhancing crystal quality and device ***,1H,1H,2H-perfluoro-1-hexene(PF_(3))with the optimal number of F presents the most effective modulation effect.A PSC utilizing PF_(3)achieves an efficiency of 24.05%,and exhibits exceptional stability against humidity and thermal *** work sheds light on the importance of tailored structure designs in additives for achieving high-performance PSCs.

关键词： perovskite solar cells fluorine number additive structure crystallization regulation defect passivation

基于血清药物化学和网络药理学的蛇莓抗炎药效物质基础和作用机制研究

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中国医院药学杂志 2024年第14期44卷 1635-1644页

作者：陈笑天廖君李聪梁勇肖欢乐颖娜熊磊南昌医学院药学院江西南昌330052 江西中医药大学药学院江西南昌330004 南昌大学第一附属医院医务处江西南昌330006

目的:基于血清药物化学研究方法结合网络药理学与分子对接研究蛇莓发挥抗炎作用的药效物质基础和作用机制。方法:大鼠灌胃给予蛇莓水提液,眼眶取血并分离血清。采用超高效液相色谱-四极杆-飞行时间质谱(UPLC-Q-TOF-MS)技术,结合Agilent ... 详细信息

目的:基于血清药物化学研究方法结合网络药理学与分子对接研究蛇莓发挥抗炎作用的药效物质基础和作用机制。方法:大鼠灌胃给予蛇莓水提液,眼眶取血并分离血清。采用超高效液相色谱-四极杆-飞行时间质谱(UPLC-Q-TOF-MS)技术,结合Agilent Masshunter Qualitative Analysis数据处理系统,通过对比蛇莓水提液、空白血清和含药血清,结合对照品、二级谱图和已有文献,对蛇莓入血成分进行鉴定。利用SwissTargetPrediction数据库获取入血成分靶点,Genecards、Drugbank数据库获得疾病靶点。利用Jvenn网站取成分靶点和疾病靶点的交集,通过String数据库绘制蛋白相互作用关系(protein-protein interaction,PPI)网络图,利用DAVID数据库对交集靶点进行基因本体(Gene Ontology,GO)功能富集分析和京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)通路富集分析。使用Autodock软件对入血成分与核心靶点进行分子对接,使用Pymol软件对分子对接的结果进行可视化处理。结果:根据质谱分子量、碎片裂解规律并结合对照品、文献及数据库等相关信息,从大鼠含药血清当中鉴定出27个原型入血成分,包括黄酮类9个,有机酸类8个,苯丙素4个,香豆素3个,三萜类2个,醛类1个。化合物和疾病共有靶点356个,通过PPI网络筛选出SRC、EGFR、AKT1、TNF等11个核心靶点。KEGG分析结果显示蛇莓主要通过调控EGFR酪氨酸激酶抑制剂耐药性通路、TNF信号通路、ErbB信号通路、HIF-1信号通路等发挥作用。对关键成分与核心靶点进行分子对接,结果显示蛇莓关键成分与核心靶点的结合能力良好。结论:所建立的方法能高效、灵敏地分析蛇莓的入血成分。蛇莓中的金丝桃苷、紫云英苷、木犀草素等黄酮类物质和鞣花酸等酚酸类物质可能是其发挥抗炎作用的药效物质,并通过EGFR、HIF-1、TNF等通路调节炎症反应从而发挥药理作用。该研究阐明了蛇莓的药效物质基础,为继续研究与开发蛇莓提供参考。

关键词：蛇莓 UPLC-Q-TOF-MS 血清药物化学药效物质基础网络药理学分子对接

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