检索结果-南通市图书馆

Ultrafine SnO_(2)in situ modified graphite felt derived from metal-organic framework as a superior electrode for vanadium redox flow battery

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2023年第4期42卷 1214-1226页

作者： Qing-Chun Jiang Jin Li yu-jie Yang yu-jie ren Lei Dai Jia-Yi Gao Ling Wang Jia-Ye Ye Zhang-Xing He School of Chemical Engineering North China University of Science and TechnologyTangshan063009China Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment North China University of Science and TechnologyTangshan063009China Faculty of Science School of Chemistry and PhysicsQueensland University of TechnologyBrisbaneQLD4001Australia Center for Materials Science Queensland University of TechnologyBrisbaneQLD4001Australia

Metal-organic framework(MOF)and its derivatives have low-cost,controllable structure,and good catalytic performance,which are often used in the electrochemical *** this work,SnO_(2)in situ modified graphite felt(SnO_(2)/GF)is prepared by hydrothermal method then simple thermal treatment using Sn-based MOF(Sn-MOF)as ***_(2)is uniformly and firmly distributed on the GF surface rather than the common agglomeration and poor bonding of metal oxides on carbon-based electrodes,providing stable active centers for the VO^(2+)/VO_(2)^(+)and V^(2+)/V^(3+)redox ***250 mA·cm^(-2),the energy efficiency of the battery with SnO_(2)/GF remains at 63.2%,while the blank one has *** former battery,at 100 mA·cm^(-2),has higher energy efficiency and good cycle stability(over 200 cycles).The battery performance of this study is better than that of most previous report in metal oxide-related *** work obtains high-performance composite electrode by simple treatment of MOF,which provides a reference for the application of MOF in vanadium redox flow battery.

关键词： Vanadium redox flow battery(VRFB) Composite electrode Metal-organic framework(MOF) In situ SnO_(2)

新生儿缺氧缺血性脑病诊断与治疗的现状与新动向

在线全文

学校读者我要写书评

暂无评论

中华儿科杂志 2005年第8期43卷 561-563页

作者：虞人杰清华大学第一附属医院儿科北京100016

目前，新生儿缺氧缺血性脑病（HIE）的诊断与治疗规范问题仍是国内外新生儿同道关注的热点。虽然，近年来国内外倾注大量人力、物力，对此进行相关研究，但对重度HIE病例而言，在阻断再灌注损伤、抑制凋亡等方面还未取得突破性进展，也... 详细信息

目前，新生儿缺氧缺血性脑病（HIE）的诊断与治疗规范问题仍是国内外新生儿同道关注的热点。虽然，近年来国内外倾注大量人力、物力，对此进行相关研究，但对重度HIE病例而言，在阻断再灌注损伤、抑制凋亡等方面还未取得突破性进展，也缺乏有效的治疗手段。

关键词：新生儿缺氧缺血性脑病诊断与治疗新动向重度HIE 再灌注损伤治疗规范相关研究抑制凋亡治疗手段

在线全文

学校读者我要写书评

暂无评论

新生儿窒息复苏的热点与挑战

中华儿科杂志 2007年第9期45卷 641-643页

作者：虞人杰清华大学第一附属医院儿科北京100016

随着复苏进展与热点的讨论与2005年国际新生儿复苏协议、国际新生儿复苏指南及美国心脏协会／美国儿科学会（AHA／AAP）2005年新生儿复苏指南主要改变的发表，新生儿复苏有了新的依据和发展。也给我国新生儿窒息复苏工作提出新的挑战。... 详细信息

随着复苏进展与热点的讨论与2005年国际新生儿复苏协议、国际新生儿复苏指南及美国心脏协会／美国儿科学会（AHA／AAP）2005年新生儿复苏指南主要改变的发表，新生儿复苏有了新的依据和发展。也给我国新生儿窒息复苏工作提出新的挑战。文献报告全世界每年400万新生儿死亡病例中〈5岁者约为23％，其中8％与出生时的窒息有关。我国妇幼卫生监测结果显示：2005年前三位死因为早产、出生窒息及肺炎，窒息仍为第2死因。

关键词：新生儿复苏窒息复苏美国儿科学会美国心脏协会卫生监测结果死亡病例文献报告出生时

在线全文

学校读者我要写书评

暂无评论

钨球正撞击下低碳钢板的极限贯穿厚度研究

北京理工大学学报 2017年第6期37卷 551-556页

作者：徐豫新任杰王树山北京理工大学爆炸科学与技术国家重点试验室北京100081

研究低碳钢板在钨球正撞击下的极限贯穿厚度.采用6射弹弹道极限试验数据处理方法通过试验获得Φ6.0mm(93W)、Φ7.0mm(93W)、Φ6.0mm(95W)和Φ7.5mm(95W)共4种钨球对6种不同厚度Q235A钢板正撞击下的弹道极限速度和极限贯穿厚度范围.采用A... 详细信息

研究低碳钢板在钨球正撞击下的极限贯穿厚度.采用6射弹弹道极限试验数据处理方法通过试验获得Φ6.0mm(93W)、Φ7.0mm(93W)、Φ6.0mm(95W)和Φ7.5mm(95W)共4种钨球对6种不同厚度Q235A钢板正撞击下的弹道极限速度和极限贯穿厚度范围.采用Autodyn软件进行了同试验条件下的数值仿真,仿真模型被验证后,通过仿真获得了极限贯穿厚度范围,同时分析了钨球正撞击侵彻过程中的能量转换规律.基于能量守恒,建立了钨球对低碳钢板正撞击下极限贯穿厚度的计算模型.采用所建立的计算模型计算得到:Φ6.0mm(93W)、Φ7.0mm(93W)、Φ6.0mm(95 W)和Φ7.5mm(95 W)4种钨球正撞击下Q235A钢板的极限贯穿厚度分别为16.95,19.17,17.30,21.50mm,计算结果与试验和数值仿真所获得范围误差不大于10%.研究结果为杀爆战斗部毁伤元的设计提供了基础数据以及方法支撑.

关键词：高速侵彻动力学极限贯穿厚度钨球低碳钢

在线全文

学校读者我要写书评

暂无评论

我国新生儿窒息复苏指南基本论点及新热点

实用儿科临床杂志 2007年第14期22卷 1041-1043页

作者：虞人杰清华大学第一附属医院儿科北京100016

2004年卫生部妇幼保健与社区卫生司在全国开展新生儿窒息复苏培训项目,其目标为5年内在我国建立一个遍及全国的、掌握新生儿窒息复苏技术的人才队伍,确保我国每家医院的每个分娩现场至少有1名受过复苏培训、掌握新生儿复苏技术的医护人... 详细信息

2004年卫生部妇幼保健与社区卫生司在全国开展新生儿窒息复苏培训项目,其目标为5年内在我国建立一个遍及全国的、掌握新生儿窒息复苏技术的人才队伍,确保我国每家医院的每个分娩现场至少有1名受过复苏培训、掌握新生儿复苏技术的医护人员在场。并在2004年组织专家制订结合我国国情的中国新生儿窒息复苏指南。本文介绍"指南"基本论点及窒息复苏的某些新热点。

关键词：婴儿新生复苏指南基本论点新热点

Ideal Bi‑Based Hybrid Anode Material for Ultrafast Charging of Sodium‑Ion Batteries at Extremely Low Temperatures

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第3期17卷 152-167页

作者： jie Bai Jian Hui Jia yu Wang Chun Cheng Yang Qing Jiang Key Laboratory of Automobile Materials(Jilin University) Ministry of EducationSchool of Materials Science and EngineeringJilin UniversityChangchun 130022People’s Republic of China

Sodium-ion batteries have emerged as competitive substitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at−20°C or ***,the key capability of ultrafast charging at ultralow temperature for SIBs is rarely ***,a hybrid of Bi nanoparticles embedded in carbon nanorods is demonstrated as an ideal material to address this issue,which is synthesized via a high temperature shock *** a hybrid shows an unprecedented rate performance(237.9 mAh g^(−1)at 2 A g^(−1))at−60℃,outperforming all reported SIB anode *** with a Na_(3)V_(2)(PO_(4))_(3)cathode,the energy density of the full cell can reach to 181.9 Wh kg^(−1)at−40°*** on this work,a novel strategy of high-rate activation is proposed to enhance performances of Bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.

关键词： Bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries

Constructing 2D bismuth-based heterostructure for highly efficient photocatalytic CO2 reduction

在线全文

学校读者我要写书评

暂无评论

Tungsten 2025年第1期7卷 71-79页

作者： Ruo-Hang Xu Hao-yu Jiang Dan-Dan Cui Kun-Rong Du Hong-Run Zhang Sheng-jie Xu Ya-Qi Li Zhi-Zhen ren Liang Wang Wei-Chang Hao Yi Du School of Physics and BUAA-UOW Joint Research Centre Beihang University Shenzhen Institute of Beihang University Centre for Catalysis and Clean Energy School of Environment and Science Griffith University

Reforming carbon dioxide（CO2） into fuels and valuable chemicals using solar energy holds significant potential for emission reduction and addressing energy supply *** recombination of photocarriers remains a major obstacle,however,to enhancing solar energy conversion efficiency in the photocatalytic reaction *** two-dimensional materials,constructing heterogeneous structures has emerged as an effective strategy to enhance the separation of photoexcited carriers by leveraging the internal electric field at the heterogeneous ***,we present a facile strategy for preparing Bi4NbO8Br/Bi2WO6plate-on-plate Z-scheme junctions with a strong internal electric field by in situ *** unique heterostructure facilitates efficient separation and transport of photoexcited charges by harnessing the internal electric field induced by chemical bonding at the lateral ***,the Bi4NbO8Br/Bi2WO6heterostructure exhibits enhanced CO2photoreduction properties,along with a CO yield rate of approximately 35 μmol·g-1·h-1under full light *** work offers novel insights into the synthesis of unique hetero structures intended to enhance the efficiency of photocatalytic CO2reduction.

关键词： Bi4NbO8Br/Bi2WO6 CO2 reduction Heterostructures Photocatalysts

Structural engineering of high-entropy alloys for advanced electrocatalytic reactions

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Tungsten 2025年第1期7卷 1-31页

作者： Qiao Xie Ying-jie yu Hai-Jun Zhang Ya-Ping Deng Wen Lei The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Department of Chemical Engineering Waterloo Institute for Sustainable Energy Waterloo Institute for Nanotechnology University of Waterloo

High-entropy alloys(HEAs) have emerged as promising candidates to replace traditional precious metal catalysts,owing to their unique chemical and physical *** review commences by revisiting the fundamental concepts of HEAs,including their synthesis methods and structural control strategies in *** underscores the critical role of meticulously manipulating both macroscopic and microscopic structures of the HEAs to optimize their catalytic performance.A deep understanding of the structure-activity relationship in HEAs across various configurations is pivotal in developing more effective *** review methodically encapsulates the research progress of structural control strategies for HEAs in achieving efficient energy conversion,with the aim of gaining a better understanding of the relationship between structure and *** review concludes by summarizing the current achievements and challenges,and suggestions for potential future directions of HEAs in the fields of energy conversion and environmental purification.

关键词： Electrocatalytic Energy conversion High-entropy alloys Structural modulation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

试论我国中小企业社会责任的界定与实现

特区经济 2009年第4期243卷 257-258页

作者：颜毓洁任佳保陕西科技大学陕西西安710021

在我国,中小企业在经济发展过程中占有举足轻重的作用,其社会责任的履行也逐渐引起全社会的关注。文章主要对我国中小企业应承担的社会责任的范围进行了界定,并提出了对于我国中小企业社会责任实现的几点建议和措施。

关键词：中小企业社会责任界定实现