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Phosphorus modulated porous CeO_(2)nanocrystallines for accelerated polysulfide catalysis in advanced Li-S batteries

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Journal of Materials Science & Technology 2022年第36期131卷 212-220页

作者： Xuefeng Tao Zhao Yang Menghao Cheng Rui Yan Fan Chen Sujiao Cao Shuang Li tian Ma Chong Cheng wei Yang College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China Department of Ultrasound National Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu 610041China

The insulating nature of sulfur species,sluggish reaction kinetics,and uncontrolled dissolution of lithium polysulfide(LiPS)intermediates during the complex and multiphase sulfur redox process,have severely inhibited the applications of Li-S *** this study,we report a rational strategy to accelerate the polysulfide catalysis via constructing phosphorus modulated porous CeO_(2)(P-CeO_(2))for advanced Li-S *** morphology and surface analysis demonstrate that the P-CeO_(2)consists of abundant Pmodulated porous CeO_(2)*** battery performance reveals that the introduction of P will lead to an improved initial capacity of 1027 mA hg^(-1)than that of bare CeO_(2)(895.7 mA hg^(-1))at 0.2 *** addition,the P-CeO_(2)cathode can maintain a low capacity decay ratio of 0.10%per cycle after 500 cycles at 1.0 *** coin battery tests suggest that the P-CeO_(2)cathode presents faster oxidation-reduction kinetics of LiPS and quick diffusion of Li^+***,the studies of redox processes and chemical interactions of LiPS have demonstrated the P-CeO_(2)cathode displays stronger adsorption of Li_(2)S_(6),higher redox peak current,and earlier precipitation of Li_(2)S than the bare CeO_(2).This study demonstrates for the first time that the P-modulation of metal oxide surface can simultaneously promote the catalytic reaction kinetics and chemical interaction of *** anticipate that this P-modulation method can be extended to many other nanostructured metal catalytic sites for developing affordable advanced Li-S batteries.

关键词： Metal oxides P-modulated porous CeO_(2) Polysulfide catalytic materials Shuttle effects Lithium-sulfur batteries

Topological study about failure behavior and energy absorption of honeycomb structures under various strain rates

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Defence Technology（防务技术） 2023年第6期24卷 214-227页

作者： Yu-chen wei Meng-jie tian Chun-yang Huang Shao-wu Wang xing Li Qian-ran Hu Meng-qi Yuan State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100036China Chongqing Innovation Center Beijing Institute of TechnologyChongqing400044China State Grid Anhui Electric Power Research Institute Hefei230601China

High-speed impact threats and terrorist actions on the battlefield require the development of more effective protective materials and structures,and various protective structure is designed according their energy-absorbing *** this research,the deformation behavior,microscopic failure modes and energy absorption characteristics of re-entrant hexagonal structure,regular hexagonal structure and regular quadrilateral structure are studied under different strain rates *** re-entrant hexagonal structure forms a“X”-shaped deformation zone,the regular quadrilateral and regular hexagonal structure form an“I”-shaped deformation *** microscopic appearance of the section is a mixed fracture *** effects of the topological shape,cell angle,and cell height on the impact behavior of the structure were *** the cell height is fixed and the cell angle is changed,the energy absorption of the structure increase and then decrease as the relative density *** mechanical properties of the structure are optimal when the relative density is about 18.6%and the cell angle is22.5°.When the cell angle is fixed and the cell height is changed,as the relative density increases,the energy absorption of the structure gradually *** regular quadrilateral structure and the reentrant hexagonal structure experienced clear strain rate effects under dynamic impact conditions;the regular hexagonal structure did not exhibit obvious strain rate *** results presented herein provide a basis for further rational design and selection of shock-resistant protective structures that perform well in high-speed impact environments.

关键词： Honeycomb structures Impact loading Negative Poisson's ratio Titanium alloy Dynamic response

基于PLC和NI数据采集卡的迅速减压控制系统

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现代机械 2024年第1期 99-102页

作者：陈巍谢武俊闵立武李翔田紫锋航宇救生装备有限公司湖北襄阳430000 贵州大学机械工程学院贵州贵阳550025 不详

基于S7-1500 PLC和NI数据采集卡开发了迅速减压自动控制系统,上位机软件采用LabVIEW,实现了自动加压、自动爆破、数据记录生成和数据存储、回放等,控制系统能实现压力等参数的精确控制,满足迅速减压试验的要求,提高了试验的效果和效率。

关键词： PLC NI数据采集卡低压舱迅速减压自动控制

Association of Common Genetic Variants in Mitogen-activated Protein Kinase Kinase Kinase Kinase 4 with Type 2 Diabetes Mellitus in a Chinese Han Population

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Chinese Medical Journal 2016年第10期129卷 1179-1184页

作者： Ting-Ting Li Hong Qiao Hui-xin Tong tian-wei Zhuang Tong-Tong Wang Department of Endemic Disease The Second Affiliated Hospital Harbin Medical University Harbin Heilongjiang 150081 China

Background： A study has identified several novel susceptibility variants of the mitogen-activated protein kinase kinase kinase kinase 4 （MAP4K4） gene for type 2 diabetes mellitus （T2DM） within the German population. Among the variants, five single nucleotide polymorphisms （SNPs） of MAP4K4 （rs1003376, rs1 1674694, rs2236935, rs2236936, and rs6543087） showed significant association with T2DM or diabetes-related quantitative traits. We aimed to evaluate whether common SNPs in the MAP4K4 gene were associated with T2DM in the Chinese population. Methods： Five candidate SNPs were genotyped in 996 patients newly diagnosed with T2DM and in 976 control subjects, using the SNPscanTM method. All subjects were recruited from the Second Affiliated Hospital, Harbin Medical University from October 2010 to September 2013. We evaluated the T2DM risk conferred by individual SNPs and haplotypes using logistic analysis, and the association between the five SNPs and metabolic traits in the subgroups. Results： Of the five variants, SNP rs2236935T/C was significantly associated with T2DM in this study population （odds ratio = 1.293; 95% confidence interval： 1.034-1.619, P= 0.025）. In addition, among the controls, rs1003376 was significantly associated with an increased body mass index （P = 0.045） and homeostatic model assessment-insulin resistance （P = 0.037）. Conclusions： MAP4K4 gene is associated with T2DM in a Chinese Han population, and MAP4K4 gene variants may contribute to the risk toward the development of T2DM.

关键词： Chinese Han Population Mitogen-activated Protein Kinase Kinase Kinase Kinase 4 Single Nucleotide Polymorphism Type 2 Diabetes Mellitus

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医学院校研究生培养质量保障体系的探讨

中国继续医学教育 2024年第13期16卷 168-171页

作者：胡威田梗张璐萍张乃丽张子元滨州医学院研究生处山东烟台264003

新形势下,医学教育已经摆在教育和卫生健康事业优先发展的重要地位,医学院校要加快培养国家急需的高层次人才,为实现中华民族伟大复兴的中国梦作贡献。文章通过分析决定医学院校研究生培养质量的关键性因素,并以滨州医学院为例,采取提... 详细信息

新形势下,医学教育已经摆在教育和卫生健康事业优先发展的重要地位,医学院校要加快培养国家急需的高层次人才,为实现中华民族伟大复兴的中国梦作贡献。文章通过分析决定医学院校研究生培养质量的关键性因素,并以滨州医学院为例,采取提高生源质量,深化研究生招生考试改革;优化研究生培养体系,定期修订培养方案;加强课程建设,完善课程评价体系;落实立德树人,提升导师队伍水平;检测关口前移,加强培养关键环节管理;完善学风建设机制,强化校园文化建设等一系列措施,构建医学院校研究生培养质量保障体系。

关键词：研究生培养质量保障体系医学院校生源质量培养方案导学关系

HACCP体系在鼠尾草酸生产过程中多环芳烃污染控制中的应用

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食品工业 2024年第7期45卷 22-24页

作者：贾新超牛志平高伟李雅丽田洪晨光生物科技集团股份有限公司河北省植物资源综合利用重点实验室邯郸057250

为降低或消除鼠尾草酸生产过程中多环芳烃的危害、满足消费者对鼠尾草酸产品的质量要求,文章在HACCP体系原理基础上,以鼠尾草酸生产过程为研究对象,对其生产过程中的危害因素进行全面分析,确定了关键控制点及限值,制定了预防措施,建立... 详细信息

为降低或消除鼠尾草酸生产过程中多环芳烃的危害、满足消费者对鼠尾草酸产品的质量要求,文章在HACCP体系原理基础上,以鼠尾草酸生产过程为研究对象,对其生产过程中的危害因素进行全面分析,确定了关键控制点及限值,制定了预防措施,建立了验证程序和文件记录管理程序,通过HACCP体系的建立为鼠尾草酸质量安全管控提供理论依据。

关键词： HACCP 多环芳烃质量安全理论依据

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初次全膝关节置换是否髌骨表面置换的比较

中国矫形外科杂志 2024年第14期32卷 1322-1325页

作者：罗毅孙卫平李中军王海波郝福合王强韩敦鑫中国人民解放军联勤保障部队970医院烟台院区山东烟台264000 中国人民解放军联勤保障部队970医院威海院区关节外科山东威海264200

[目的]比较初次人工全膝关节置换术(total knee arthroplasty,TKA)是否髌骨置换的早期临床疗效。[方法]回顾分析2018年2月—2020年12月本科室收治的45例(52膝)初次TKA治疗晚期骨关节炎患者的临床资料,根据医患沟通结果,24例(28膝)行髌... 详细信息

[目的]比较初次人工全膝关节置换术(total knee arthroplasty,TKA)是否髌骨置换的早期临床疗效。[方法]回顾分析2018年2月—2020年12月本科室收治的45例(52膝)初次TKA治疗晚期骨关节炎患者的临床资料,根据医患沟通结果,24例(28膝)行髌骨置换,21例(24膝)未行髌骨置换。比较两组围手术期与随访结果。[结果]两组患者均顺利完成手术,两组手术时间、术中出血量、切口长度和术后下地时间的差异均无统计学意义(P>0.05)。两组患者均获得3个月以上随访,与术前相比,末次随访时两组患者的VAS和KSS评分均显著改善,末次随访时,两组间VAS评分[(1.6±1.0)vs(1.8±0.9),P=0.781]、KSS评分[(86.3±7.9)vs(84.6±7.9),P=0.865]的差异均无统计学意义(P>0.05)。[结论]初次TKA术是否行髌骨置换的早期疗效无明显差异。

关键词：初次全膝关节置换术髌骨置换髌骨成形术

Batch fabrication of MoS_(2) devices directly on growth substrates by step engineering

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Nano Research 2023年第11期16卷 12794-12799页

作者： Lu Li Yalin Peng Jinpeng tian Fanfan Wu Xiang Guo Na Li wei Yang Dongxia Shi Luojun Du Guangyu Zhang Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China

Monolayer molybdenum disulfide(MoS_(2))has emerged as one of the most promising channel materials for next-generation nanoelectronics and optoelectronics owing to its atomic thickness,dangling-bond-free flat surface,and high electrical ***,high-quality monolayer MoS_(2)wafers are primarily grown on sapphire substrates incompatible with conventional device fabrication,and thus transfer processes to a suitable substrate are typically required before the device can be ***,we demonstrate the batch production of transfer-free MoS2 top-gate devices directly on sapphire growth substrates via step *** introducing substrate steps on growth substrate sapphire,high-κdielectric layers with superior quality and uniform can be directly deposited on the epitaxially grown monolayer MoS_(2).For the substrate with a maximum step density of 100μm^(−1),the gate capacitance can reach~1.87μF∙cm^(−2),while the interface trap state density(Dit)can be as low as~7.6×10^(10)cm^(−2)∙eV^(−1).The direct deposition of high-quality dielectric layers on grown monolayer MoS2 enables the batch fabrication of top-gate devices devoid of transfer and thus excellent device yield of>96%,holding great promise for large-scale twodimensional(2D)integrated circuits.

关键词： substrate step engineering atomic layer deposition high-κdielectric molybdenum disulfide top-gate field-effect transistor

Wafer-scale fabrication of carbon-nanotube-based CMOS transistors and circuits with high thermal stability

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Nano Research 2022年第11期15卷 9875-9880页

作者： Nan wei Ningfei Gao Haitao Xu Zhen Liu Lei Gao Haoxin Jiang Yu tian Yufeng Chen Xiaodong Du Lian-Mao Peng Beijing HuaTanYuanxin Electronics Technology Ltd.Co. Beijing 101399China Research Center for Carbon-based Electronics Peking UniversityBeijing 100871China Beijing Institute of Carbon-based Integrated Circuits Beijing 100195China

Thanks to its single-atomic-layer structure,high carrier transport,and low power dissipation,carbon nanotube electronics is a leading candidate towards beyond-silicon *** low temperature fabrication processes enable three-dimensional(3D)integration with logic and memory(static random access memory(SRAM),magnetic random access memory(MRAM),resistive random access memory(RRAM),etc.)to realize efficient near-memory ***,carbon nanotube transistors require good thermal stability up to 400℃ processing temperature to be compatible with back-end-of-line(BEOL)process,which has not been previously *** this work,we developed a robust wafer-scale process to build complementary carbon nanotube transistors with high thermal stability and good uniformity,where AlN was employed as electrostatic doping *** gate stack and passivation layer were optimized to realize high-quality ***,we demonstrate 1-bit carbon nanotube full adders working under 250℃ with rail-to-rail outputs.

关键词： carbon nanotube field-effect transistors complementary metal-oxide-semiconductor(CMOS) thermal stability waferscale integrated circuits