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Conversion between Vickers hardness and nanohardness by correcting projected area with sink-in and pile-up effects

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Plasma Science and Technology 2020年第6期22卷 188-199页

作者： Youping LU Yue su Wei GE tengfei YANG Zhanfeng YAN Yugang WANG Songqin XIA State Key Laboratory of Nuclear Physics and Technology Center for Applied Physics and TechnologyPeking UniversityBeijing 100871People's Republic of China College of Materials Science and Engineering Hunan UniversityChangsha 410082People's Republic of China 不详

The Vickers hardness test has been widely used for neutron-irradiated materials and nanoindentation for ion-irradiated *** the Vickers hardness and nanohardness of the same materials quantitatively and establishing a correlation between them is *** this study,five representative materials—pure titanium(Ti),nickel(Ni),tungsten(W),304 coarse-grained stainless steel(CG-SS)and 304 nanocrystalline austenitic stainless steel(NG-SS)—are investigated for *** results show that the relationship between Vickers hardness and nanohardness does not conform to a mathematical geometric relationship because of sink-in and pile-up effects confirmed by finite element analysis(FEA)and the results of optical ***,one new method was developed by excluding the effects of sink-in and pile-up in *** this improved correction in the projected area of the Vickers hardness and nanohardness,the two kinds of hardness become identical.

关键词： Vickers hardness nanohardness conversion

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中医药防治新型冠状病毒感染专家共识

中华中医药学刊 2024年第10期42卷 251-258页

作者：苏右竹王烁廖星吴彩军陈腾飞张伟王雪飞王玉贤王宇琛赵春霞刘清泉苏芮首都医科大学附属北京中医医院北京100010 中国中医科学院中医临床基础医学研究所北京100700 北京中医药大学东直门医院北京100007 首都医科大学附属北京地坛医院北京100015

目的为进一步明确新型冠状病毒感染的中医病名、病因、核心病机、疾病演变规律、分期论治及通治法,推动中医药行业对新冠病毒感染的统一认识。方法项目严格遵循国际指南的研制规范,经过4轮问卷调查确定临床问题清单,通过文件检索进行GR... 详细信息

目的为进一步明确新型冠状病毒感染的中医病名、病因、核心病机、疾病演变规律、分期论治及通治法,推动中医药行业对新冠病毒感染的统一认识。方法项目严格遵循国际指南的研制规范,经过4轮问卷调查确定临床问题清单,通过文件检索进行GRADE证据分级,并形成推荐意见表单,采用名义组法形成专家共识。结果经过4轮问卷调查确定14项临床问题和12项结局指标。检索10606篇文献,最终纳入145篇并进行GRADE分级,经过29名专家名义群体法形成推荐意见28项,其中强推荐4项,弱推荐24项。结论共识遵循严格的指南制定规范,充分重视一线临床专家意见,体现外感热病及早治疗、通治方和寒温统一理论思想,在最新循证依据的基础上形成具有更高可信性和可操作性的专家共识。

关键词：新型冠状病毒感染共识证据临床问题

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Hydrolyzable tannins from Balanophora polyandra

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Acta Pharmaceutica Sinica B 2013年第1期3卷 46-50页

作者： Yangai Wang Jianbo Yang Aiguo Wang Jie Ma Jin Tian tengfei Ji Yalun su State Key Laboratory of Bioactive substances and Functions of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

This study reports an investigation of the chemical constituents of Balanophora polyandra *** compounds were isolated by column chromatography on silica gel,Toyo-pearl HW-40C,Sephadex LH-20 and by *** structures were elucidated as 1,4-di-O galloy-2-O-[(E)-p-coumaroyl]-β-D-glucopyranose(1),1-O-galloyl-β-D-pyranglucose(2),1-p-coumaryl-β-D-pyranglu-cose(3),1-O-(E)-caffeoyl-β-D-pyranglucose(4),1,3-di-O-galloyl-β-D-pyranglucose(5),1,6-di-O-galloyl-β-D-pyranglucose(6),1-O-(E)-caffeoyl-4-O-galloyl-β-D-pyranglucose(7),1-O-(E)-caffeoy1-6-O galloyl-β-D-pyranglucose(8),1-0-(E)-caffeoy1-4,6-di-O-galloyl-β-D-pyranglucose(9),1-O-(E)-caffeoyl-4,6-(S)-HHDP-B-D-pyranglucose(10),1,23,6-tetra-O-galloyl-β-D-pyranglucose(11),4,6-(S)-hexahydroxydi-phenoyl-(α/β)-D-glucose(12),1-O-(E)-caffeoyl-4,6-[1′,1″-3′,3″,4′,4″-tetrahydroxydibenzofurandicar-boxyl)]-β-D glucopyranose(13),flavogallonic acid(14),and phloretin-4′-O-β-D-glucoside(15)on the basis of spectral *** 1 was a new hydrolyzable tannin,9 was obtained from this genus for the first time,and compounds 5,6 and 11-14 were isolated from this plant for the first time.

关键词： Balanophora polyandra Hydrolyzable tannin 1,4-di-O-galloyl-2-O-[(E)-p-coumaroyl]-β-D-glucopyranose

《中医药防治新型冠状病毒感染专家共识》临床问题的确定

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中国中医急症 2024年第3期33卷 377-382页

作者：王雪飞苏右竹廖星王烁王宇琛赵春霞陈腾飞刘清泉苏芮首都医科大学附属北京中医医院北京100010 北京中医药大学北京100029 中国中医科学院中医临床基础医学研究所北京100700

目的确定《中医药防治新型冠状病毒感染专家共识》的临床问题,为该共识形成推荐意见提供基础,为突发急性传染病相关共识的制定提供参考。方法采用文献调研与德尔菲法相结合的方法,开展文献研究和专家学术观点的梳理,采用德尔菲法开展第... 详细信息

目的确定《中医药防治新型冠状病毒感染专家共识》的临床问题,为该共识形成推荐意见提供基础,为突发急性传染病相关共识的制定提供参考。方法采用文献调研与德尔菲法相结合的方法,开展文献研究和专家学术观点的梳理,采用德尔菲法开展第一轮问卷调查,确定临床一线医生关注的主要临床问题形成条目池,在此基础上制定第二轮调查问卷,以票选率>70%为标准纳入原始问题清单。梳理共14个临床问题及15个结局指标,开展第三轮问卷调查,得票率>70%的项目纳入指南问题清单及结局指标。结果最终纳入文献145篇,专家对新冠病毒感染的病因、病机、分期及治疗方面的认识比较一致,认为“湿”为本病的核心病机,普遍认同分消走泄、疏通气机是治疗关键,在病名的命名方面分歧比较明显。第一轮德尔菲法回收82份问卷,第二轮德尔菲法回收92份问卷,形成原始问题清单;第三轮问卷调查最终采纳14项临床问题及12个结局指标。结论规范地在文献研究及与德尔菲法问卷调查基础上筛选制定的临床问题能够比较全面地反映临床一线需求、主要学术观点及外感热病经典理论,能够提高指南的可推广性和可行性。

关键词：新型冠状病毒感染专家共识临床问题德尔菲法文献研究

Effect of Tides on the Stratigraphic Resistance of the South Coast of the Laizhou Bay

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Journal of Water Resource and Protection 2017年第6期9卷 590-600页

作者： Qiao su Xingyong Xu Wenquan Liu Guangquan Chen tengfei Fu Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of Oceanography State Oceanic Administration Qingdao China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology Qingdao China

Seawater intrusion is a global environmental problem that is becoming increasingly severe with the overexploitation of underground freshwater in coastal regions and sea-level rise caused by global climate change. Although a series of achievements has been made on seawater intrusion, the role of tidal effects has not been fully revealed. In this paper, a typical case of tidal effects on seawater intrusion is provided. The high-density resistivity method was applied to the high-frequency continuous measurement of the stratigraphic resistance of the south coast of the Laizhou Bay, followed by the panel data analysis method. The results indicate that the formation resistivity in coastal area was affected by the tidal level significantly, particularly in the seawater intrusion channel. The effect of tide on the intensity distribution of formation resistivity was evaluated using this method. Because of the presence of a brine layer in the section, the trends of the tidal level effect on the formation resistivity in the left and right sides of the section were opposite, and the intensity of the effect increased sideways.

关键词： Seawater Intrusion Tidal the High-Density Resistivity Method Panel Data

栽插日期对甘薯品种“渝薯15”块根品质及产量的影响

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南方农业 2024年第5期18卷 78-81页

作者：段小炼崔洪平胡江苏令高纪龙秦瑞华赵腾飞傅玉凡重庆市科学技术研究院重庆401123 万州区恒合乡农业技术服务中心重庆万州409613 西南大学生命科学学院/重庆市甘薯工程技术研究中心重庆400715

为促进重庆市万州区恒合土家族乡淀粉甘薯产业的发展,于2022年在该乡凤安社区开展了淀粉型甘薯“渝薯15”的3个栽插日期(D1:4月26日,D2:5月10日,D3:5月25日)对其块根干物质含量、淀粉含量、直链淀粉比例、粗蛋白含量、可溶性糖含量、还... 详细信息

为促进重庆市万州区恒合土家族乡淀粉甘薯产业的发展,于2022年在该乡凤安社区开展了淀粉型甘薯“渝薯15”的3个栽插日期(D1:4月26日,D2:5月10日,D3:5月25日)对其块根干物质含量、淀粉含量、直链淀粉比例、粗蛋白含量、可溶性糖含量、还原糖含量、多酚含量和总黄酮含量等主要品质和鲜薯产量、淀粉产量的影响研究。结果表明:在适宜栽期内,早栽的“渝薯15”不仅鲜薯产量、淀粉含量有增加的趋势,而且能显著提高淀粉产量,D1比D3增加了24.78%。早栽的“渝薯15”块根里的粗蛋白质、可溶性糖、还原糖等影响淀粉加工污水处理的化学成分含量变化不明显,多酚含量反而显著降低,不影响“渝薯15”淀粉的加工利用。研究结果为淀粉品种“渝薯15”在该乡种植推广和加工利用提供了一定的依据。

关键词：甘薯渝薯15 栽插日期产量品质

State of the Art and Prospects in Metal-Organic Framework-Derived Microwave Absorption Materials

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Nano-Micro Letters 2022年第4期14卷 238-276页

作者： Shuning Ren Haojie Yu Li Wang Zhikun Huang tengfei Lin Yudi Huang Jian Yang Yichuan Hong Jinyi Liu State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Microwave has been widely used in many fields,including communication,medical treatment and military industry;however,the corresponding generated radiations have been novel hazardous sources of pollution threating human’s daily ***,designing high-performance microwave absorption materials(MAMs)has become an indispensable ***,metal-organic frameworks(MOFs)have been considered as one of the most ideal precursor candidates of MAMs because of their tunable structure,high porosity and large specific surface ***,MOF-derived MAMs exhibit excellent electrical conductivity,good magnetism and sufficient defects and interfaces,providing obvious merits in both impedance matching and microwave *** this review,the recent research progresses on MOF-derived MAMs were profoundly reviewed,including the categories of MOFs and MOF composites precursors,design principles,preparation methods and the relationship between mechanisms of microwave absorption and microstructures of ***,the current challenges and prospects for future opportunities of MOF-derived MAMs are also discussed.

关键词： Microwave absorption materials Metal-organic frameworks Preparation methods Mechanisms of microwave absorption

基于多目标性能的高强钢组合K形偏心支撑框架塑性设计方法研究

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建筑结构学报 2023年第1期44卷 10-22页

作者：李腾飞苏明周郭江然西安建筑科技大学土木工程学院陕西西安710055 西安建筑科技大学结构工程与抗震教育部重点实验室陕西西安710055

高强钢组合K形偏心支撑框架结构(K-HSS-EBFs)作为一种典型的双重抗侧力体系,可以实现结构抗震设计中多道设防的目标。针对传统K-HSS-EBFs性能设计方法中无法考虑多水准抗震设防目标以及支撑-框架体系剪力分配的问题,对基于多目标性能的K... 详细信息

高强钢组合K形偏心支撑框架结构(K-HSS-EBFs)作为一种典型的双重抗侧力体系,可以实现结构抗震设计中多道设防的目标。针对传统K-HSS-EBFs性能设计方法中无法考虑多水准抗震设防目标以及支撑-框架体系剪力分配的问题,对基于多目标性能的K-HSS-EBFs塑性设计方法进行修正。通过考虑结构后屈服刚度变化得到K-HSS-EBFs的三折线能力曲线,采用能量平衡原理计算支撑-框架体系在不同性能目标下的弹性和弹塑性剪力分配,从而对结构进行弹塑性设计。采用修正的设计方法设计了一个6层的K-HSS-EBFs结构算例,建立OpenSees有限元模型,选取20条地震波对其进行不同强度地震作用下的弹塑性时程分析。结果表明:采用所提设计方法设计的K-HSS-EBFs实现了结构预期的破坏模式以及不同强度地震作用下的位移延性需求和剪力分布模式;从多遇地震到罕遇地震,算例模型中框架跨所承担的基底剪力占比由29%提高到44%,满足GB 50011—2010《建筑抗震设计规范》中对于多道设防体系内力重分布后的结构总基底剪力分配要求。

关键词：高强钢偏心支撑框架多目标性能塑性设计能力曲线剪力分配

Photo-induced fusion of monodisperse polymer microspheres:A novel strategy for constructing topological microsphere clusters with improved stability

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Aggregate 2023年第5期4卷 152-160页

作者： Zixiang He su Shen Gong Zhang tengfei Miao Xiaoxiao Cheng Zhao Wang Qingping Song Wei Zhang State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Engineering Laboratory of Novel Functional Polymeric MaterialsSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhouP.R.China School of Chemical and Environmental Engineering Anhui Polytechnic UniversityWuhuP.R.China College of Physics Optoelectronics and Energy Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhouP.R.China

The preparation of monodisperse azobenzene(Azo)polymer microspheres by dispersion polymerization was *** photo-induced fusion of Azo polymer microspheres was successfully achieved during the process of reversible trans-cistrans photoisomerization of Azo units,and induced various unique“microsphere molecular”clusters or“microsphere polymers”.Encouraged by this interesting phenomenon,microsphere clusters of different topological structures were stabilized by the in situ acetal cross-linking *** photo-induced fusion polymerization of monodisperse polymer microspheres provides a new strategy for designing photo-responsive clusters and allows for control over the mechanical properties of microspheres with high spatiotemporal resolution.

关键词： azobenzene dispersion polymerization fusion polymerization microsphere clusters polymer microspheres