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Reliable sensors based on graphene textile with negative resistance variation in three dimensions

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Nano Research 2021年第8期14卷 2810-2818页

作者： Wenpeng Han Yijun Wu He Gong Linxin Liu Junxiang yan mengfei Li Yunze Long Guozhen Shen College of Physics Qingdao UniversityQingdao 266071China State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Beijing National Laboratory for Condensed Matter physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

The weft-knitted reduced graphene oxide(r-GO)textile that is made up of many conductive r-GO coated fibers was successfully prepared dependent on the electrospray deposition ***,the r-GO textile presents negative resistance variation not only in axial direction as the pressure increases but also in transverse direction as the lateral stretch increases which makes it has the advantage to fabricate the reliable sensors based on strain-resistance *** transverse-strain and pressure sensors based on the r-GO textiles all show the excellent sensing characteristics such as high sensitivity,reliability,and good durability,*** maximum gauge factors(GF)of the transverse-sensor are 27.1 and 153.5 in the x-and/-direction,*** the practical detection range can up to 40%in the x-direction and 35%in the y-direction,*** r-GO textile pressure sensor also shows high sensitivity for a broad pressure range that with a GF up to 716.8 kPa-1 for less than 4.5 kPa region and still has more sensitive pressure sensing characteristics even the pressure goes up to 14 *** on those good performances of r-GO textile sensors,its potential applications in human body states monitoring have been studied.

关键词： reduced graphene oxide textile transverse-strain sensor pressure sensor negative resistance variation human body states

基于文献计量学和可视化技术的抗栓治疗危险因素分析

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医药导报 2024年第4期43卷 614-619页

作者：许丽丽李舒悦王丽曼陈艳戴梦飞徐航葛卫红中国药科大学南京鼓楼医院药学部南京210008 中国药科大学基础医学与临床药学学院南京210009

目的分析国内外抗栓治疗(抗血小板治疗和抗凝治疗,即抗栓的药物治疗)危险因素的现状和特点,为防治抗栓治疗引起的血栓或出血提供理论依据。方法检索2011年1月至2021年11月期间发表在中文数据库(中国期刊全文数据、万方数据库、维普数据... 详细信息

目的分析国内外抗栓治疗(抗血小板治疗和抗凝治疗,即抗栓的药物治疗)危险因素的现状和特点,为防治抗栓治疗引起的血栓或出血提供理论依据。方法检索2011年1月至2021年11月期间发表在中文数据库(中国期刊全文数据、万方数据库、维普数据库)以及英文数据库(PubMed、Web of science、MEDLINE)有关抗栓治疗危险因素的相关文献,进行文献计量学分析并使用VOSviewer软件进行可视化分析。结果共纳入595篇文献,英文文献发表量前三的国家分别为美国、中国和日本。研究类型以队列研究为主,样本数量大多在1000例以内。抗栓治疗危险因素分为影响抗血小板药物、华法林以及新型口服抗凝药治疗的危险因素。年龄、性别、肾功能、抗栓药物的联用等是共同的危险因素,不同的抗栓药物的危险因素也有其自身特点。结论国内外抗栓治疗危险因素的研究数量较多但样本量有待增加。药师应基于不同药物和不同人群进行个体化用药服务,保障患者的用药安全。

关键词：抗栓治疗危险因素计量分析可视化技术

U-Pb Isotope Geochronology of Syntectonic Granites from Hainan Island,South China:Constraints on Tectonic Evolution of the Eastern Paleo-Tethys Ocean

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Journal of Ocean University of China 2020年第6期19卷 1315-1330页

作者： ZHOU yang yan Yi LIU Hailing CAI Jianxin ZHOU mengfei ZHANG Xinchang WANG Yin SHEN Baoyun Key Laboratory of Ocean and Marginal Sea Geology Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301China Institute of Porous Flow and Fluid Mechanics Chinese Academy of SciencesLangfang 065007China SKL Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006China

Since the recognition of the Indosinian orogeny in northern Vietnam,Triassic orogens have been widely identified around the western and southwestern boundaries of the South China *** paleo-Tethys sutures stretch from west to southeast,from Jinshajiang-Ailaoshan via NE Vietnam to Hainan Island;these sutures exhibit and develop voluminous Permian-early Triassic magmatism and numerous high-strain shear *** ophiolites related to the paleo-Tethys are lacking on Hainan Island,the eastward extension of the Indosinian orogeny and subduction and closure time of the paleo-Tethys Ocean on Hainan Island remain ***,an integrated kinematic and geochronological study has been conducted on two shear zones,called the Xiaomei and Mangsan shear zones.U-Pb zircon dating yields an age of early Triassic(252-251 Myr)for Xiaomei syntectonic granites which formed in the same tectonic setting and presented the similar nanoparticles to the Indosinian granites from Ailaoshan ductile shear zone,including the strawberry-like and flower-like *** NE-trending Mangsan shear zone represented by the gneissic granites with middle Permian ages(264-262 Myr)formed in the same tectonic setting as the Wuzhi-shan granites that were proposed as I-type *** middle Permian gneissic granites with arc affinity may represent an arc setting related to the NW subduction of the *** analyses reveal that granites with late Triassic ages(235-232 Myr)in the Xiaomei shear zone have the characteristics of A-type *** late Triassic extensional events on Hainan Island may be related to the subduction of the paleo-Pacific Plate beneath the East Asian continent.

关键词： Indosinian orogeny Hainan Island Xiaomei shear zone Mangsan shear zone syntectonic granites paleo-Tethys

Self-assembled Ag_(4)V_(2)O_(7)/Ag_(3)VO_(4) Z-scheme heterojunction by pH adjustment with efficient photocatalytic performance

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Journal of Advanced Ceramics 2022年第11期11卷 1789-1800页

作者： yan XING Xichuan LU Yi LI Bozhi yanG Yujia HUANG mengfei ZHANG Jing CHENG Xin MIN Wei PAN New Energy Technology Engineering Lab of Jiangsu Province College of ScienceNanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of New Ceramics&Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China College of Mathematics and Physics Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China School of Materials Science and Hydrogen Energy Foshan UniversityFoshan 528000China

Semiconductor heterojunction plays a pivotal role in ***,the construction of a heterojunction with a fine microstructure usually requires complex synthetic ***,a pH-adjusted one-step method was employed to controllably synthesize Ag_(4)V_(2)O_(7)/Ag_(3)VO_(4) heterojunction with a well-tuned 0D/1D hierarchical structure for the first *** is noteworthy that the ordered stacking of vanadium oxide tetrahedron(VO_(3)-)guided by the pH value wisely realizes the in-situ growth of Ag_(4)V_(2)O_(7) nanoparticles on the surface of Ag_(3)VO_(4) ***,comprehensive characterization and calculation decipher the electronic structures of Ag_(4)V_(2)O_(7) and Ag_(3)VO_(4) and the formation of Z-scheme heterojunction,benefiting the visible light harvesting and carrier *** a new Ag_(4)V_(2)O_(7)/Ag_(3)VO_(4) heterojunction exhibits remarkable photocatalytic activity and excellent *** degradation of Rhodamine B(RhB)can be achieved in 10 min by the Ag_(4)V_(2)O_(7)/Ag_(3)VO_(4) heterojunction under visible light irradiation,demonstrating an outstanding reaction rate of 0.35 min^(−1) that is up to 84-fold higher than those of other silver *** importantly,this integration of synthesis technology and heterojunction design,based on the intrinsic crystal and electronic structures,could be inspiring for developing novel heterostructured materials with advanced performance.

关键词： Ag_(4)V_(2)O_(7)/Ag_(3)VO_(4) self-assembly heterojunction Z scheme photocatalysis

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过渡金属碳基材料作为电催化剂的研究进展

当代化工研究 2024年第15期 33-35页

作者：于文洁付秋菊牟梦菲闫理停齐鲁工业大学(山东省科学院)材料科学与工程学院山东250353

电催化作为能源转换的重要环节,亟需开发高性能易合成的优良催化剂用于电催化反应。与单原子催化剂相比,双金属原子催化剂不仅延续了单原子催化剂的优点,并且双原子之间的协同效应等在反应过程中会表现出独特的选择性,引发了人们的研究... 详细信息

电催化作为能源转换的重要环节,亟需开发高性能易合成的优良催化剂用于电催化反应。与单原子催化剂相比,双金属原子催化剂不仅延续了单原子催化剂的优点,并且双原子之间的协同效应等在反应过程中会表现出独特的选择性,引发了人们的研究兴趣和广泛关注,双原子催化剂在HER、OER、ORR、NRR、CO_(2)RR等重要的电催化反应中均表现出的良好催化性能。本文主要综述了非贵金属双原子催化剂在各类电化学反应中的研究进展与优势,并结合第一性原理计算对反应机理进行更深入的讨论。最后,对推动开发用于电催化领域的双原子催化剂进行了总结和展望。

关键词：双原子电催化密度泛函理论

Analysis of Chang’e-5 lunar core drilling process

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Chinese Journal of Aeronautics 2023年第2期36卷 292-303页

作者： yanhong ZHENG mengfei yanG Xiangjin DENG Shengyi JIN Jing PENG yan SU Zheng GU Liping CHEN Yong PANG Nai ZHANG Beijing Institute of Spacecraft System Engineering Beijing 100094China China Academy of Space Technology Beijing 100094China National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China Beijing Spacecrafts Beijing 100094China

Chang’e-5 explorer successfully acquired lunar regolith core samples from depths of greater than 1 m of lunar *** study analyzed the lunar core drilling process based on the telemetry data,image information,and returned samples to optimize the sampling device design and enhance the understanding of the lunar *** particular,a prediction method for the projected drilling path and local terrain fitting of drilling dip angle was proposed based on the flight events recorded during the core drilling process and the image information acquired before,during,and after *** results revealed that the drilling dip angle of Chang’e-5 was approximately2.3.,and the deviation of the drilling length and depth was less than 2 *** continuous drilling,a fusion method based on telemetry data and image information was applied to determine the demarcation point of drilling with and without the lunar *** position of the demarcation point implied that the drilling point remained at approximately 6 mm loose soil,thereby lagging the action of the force ***,a characteristic parameter comparison method was proposed for the lunar and ground drilling to analyze the status of the lunar ***,the analysis results revealed that the majority of the Chang’e-5 drilling samples were derived from 0–73.8 cm below the lunar surface and few samples were extracted below 73.8 cm,as the drilling encountered several rocky ***,the drilling point exhibited two prominent stratification variations at~28.7 cm and~70 cm below the lunar ***,the preliminary relationship between sample dissected position in soft tube and drilling displacement was *** segmented estimation results can support research on subsurface lunar soil.

关键词： Chang’e-5 Core drilling Drill sampling Lunar regolith Returned samples

二维MXene负载MoO_(3)/Ni-NiO异质结催化材料用于高效碱性电催化析氢反应

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复合材料学报 2024年第5期41卷 2546-2558页

作者：刘寿达刘娟娟刘潞潞董梦飞李瑞高晓明高楼军简选延安大学化学与化工学院陕西省化学反应工程重点实验室延安716000 太原理工大学环境科学与工程学院晋中030600

氢能作为低碳和零碳能源,是未来国家能源体系的重要组成部分,开发高效、低廉的碱性析氢(HER)电催化剂对于氢能的大规模制备和利用具有重要的意义。本文以二维Nb_(2)CT_(x)MXene为载体,通过一步电化学共沉积法在其表面负载MoO_(3)/Ni-Ni... 详细信息

氢能作为低碳和零碳能源,是未来国家能源体系的重要组成部分,开发高效、低廉的碱性析氢(HER)电催化剂对于氢能的大规模制备和利用具有重要的意义。本文以二维Nb_(2)CT_(x)MXene为载体,通过一步电化学共沉积法在其表面负载MoO_(3)/Ni-NiO异质结构,得到具有优异电催化HER性能的MoO_(3)/NiNiO/Nb_(2)CT_(x)催化材料。采用XRD、SEM和TEM等手段对MoO_(3)/Ni-NiO/Nb_(2)CT_(x)的表面形貌和结构进行表征,发现通过一步电化学共沉积法成功地将MoO_(3)/Ni-NiO异质结构紧密负载于Nb_(2)CT_(x)MXene纳米片表面。在1.0 mol/L KOH电解质中测试其HER性能,在10 mA·cm^(-2)和100 mA·cm^(-2)的电流密度时,MoO_(3)/NiNiO/Nb_(2)CT_(x)表现出较低的过电压,分别为8 mV和201 mV,Tafel斜率为51 mV·dec^(-1);并且在电流密度分别为10 mA·cm^(-2)和50 mA·cm^(-2)下连续电解产氢20 h,活性几乎保持不变,具有优异的碱性HER稳定性。此外,本文还采用工况电化学阻抗谱对不同催化电极材料在过电压从0~220 mV(vs可逆氢电极(RHE))进行HER工况表征,结果表明MoO_(3)/Ni-NiO/Nb_(2)CT_(x)可有效促进水解离过程和活性氢吸附过程,从而提高HER活性。

关键词：二维Nb_(2)CT_(x)MXene MoO_(3)/Ni-NiO异质结电催化碱性条件析氢反应

3D打印技术融入材料成型及控制工程课程教学改革的应用探索

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科技资讯 2024年第9期22卷 206-209页

作者：张洪敏王知鸷闫恪涛孙尚琪周孟飞常州大学机械与轨道交通学院江苏常州213164

“工业4.0”发展进程需要材料学作为支持,而材料学的发展需要高水平的课程体系,以及多学科知识的交叉融合。但目前材料成型及控制工程开设的课程体系与内容存在学生学习积极性与兴趣不足等问题,严重影响材料成型及控制工程专业课程教学... 详细信息

“工业4.0”发展进程需要材料学作为支持,而材料学的发展需要高水平的课程体系,以及多学科知识的交叉融合。但目前材料成型及控制工程开设的课程体系与内容存在学生学习积极性与兴趣不足等问题,严重影响材料成型及控制工程专业课程教学成效。因此,应着重分析3D打印技术在材料成型及控制工程课程教学改革中应用优势,介绍3D打印技术在材料成型及控制工程课程教学改革中的融入途径,指出3D打印技术的应用实践,多方面结合共同提高课程教学改革效果,提高课程教学质量,以推动材料科学良好发展。

关键词： 3D打印技术材料成型及控制工程课程教学改革课程评价

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基于HyperMesh车载储氢系统结构优化与随机振动分析

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农业装备与车辆工程 2024年第9期62卷 14-18页

作者：唐小龙潘青李力军燕泽英申思佳纪孟菲赵强国家燃料电池技术创新中心山东潍坊261061 潍柴动力股份有限公司山东潍坊261061

近年来,燃料电池汽车的零排放逐渐受到人们的关注,氢系统作为燃料电池汽车的重要组成部分,其结构强度尤为重要。对某冷藏车用车载储氢系统结构进行有限元分析,由模态分析得到储氢系统框架的固有频率,通过冲击分析、随机振动分析得到储... 详细信息

近年来,燃料电池汽车的零排放逐渐受到人们的关注,氢系统作为燃料电池汽车的重要组成部分,其结构强度尤为重要。对某冷藏车用车载储氢系统结构进行有限元分析,由模态分析得到储氢系统框架的固有频率,通过冲击分析、随机振动分析得到储氢系统框架的薄弱位置,针对薄弱位置进行局部结构优化;优化前后的仿真结果对比表明,冲击分析最大应力由515.2 MPa降为289.1 MPa,随机振动分析最大应力由1 380.6 MPa降为294.3 MPa,优化后的车载储氢系统框架可靠性得到明显提升,研究结果对商用车车载储氢系统设计具有一定指导意义。

关键词：车载氢系统静强度随机振动