检索结果-南通市图书馆

CR400BF平台动车组高低速风机控制接触器故障问题分析及解决措施研究

在线全文

学校读者我要写书评

暂无评论

智慧轨道交通 2024年第3期61卷 63-68页

作者：姜洪亮中车青岛四方车辆研究所有限公司山东青岛266031

结合原理分析、故障统计、原因分析、模拟试验,对CR400BF平台高低速风机控制接触器故障的原因进行了剖析,发现运用环境中侵入器件内部的灰尘毛絮和长期使用过程中触点表面产生的氧化、硫化是导致接触器偶发故障的主要原因。针对故障原... 详细信息

结合原理分析、故障统计、原因分析、模拟试验,对CR400BF平台高低速风机控制接触器故障的原因进行了剖析,发现运用环境中侵入器件内部的灰尘毛絮和长期使用过程中触点表面产生的氧化、硫化是导致接触器偶发故障的主要原因。针对故障原因设计了系统匹配性、环境适应性更强的新型触点模块优化方案,并通过地面验证试验、装车验证试验,证明了其能够提升高低速风机控制接触器可靠性,降低故障率,为高低速风机控制接触器故障的解决提供了借鉴参考。

关键词：动车组高低速风机控制接触器尘埃膜氧化膜系统环境适应性电接触触头材质可靠性

基于TRPV1探讨黄五甘附膏治疗膝骨关节炎外周炎性痛敏的作用机制

在线全文

学校读者我要写书评

暂无评论

中国实验方剂学杂志 2024年第14期30卷 97-106页

作者：姜楚洋王兆南姜洪亮赵子苇赵乐马艳苗李艳彦山西中医药大学山西晋中030619 山西中医药大学附属医院太原030024

目的:观察黄五甘附膏对阳虚寒凝证膝骨关节炎(KOA)大鼠滑膜组织瞬时受体电位锚蛋白1(TRPV1)受体表达、巨噬细胞极化及p38丝裂原活化蛋白激酶(p38 MAPK)信号通路调控作用,探讨其缓解KOA外周炎性痛敏的作用机制。方法:48只雄性SD大鼠随机... 详细信息

目的:观察黄五甘附膏对阳虚寒凝证膝骨关节炎(KOA)大鼠滑膜组织瞬时受体电位锚蛋白1(TRPV1)受体表达、巨噬细胞极化及p38丝裂原活化蛋白激酶(p38 MAPK)信号通路调控作用,探讨其缓解KOA外周炎性痛敏的作用机制。方法:48只雄性SD大鼠随机分为空白组、模型组、黄五甘附膏高、中、低剂量组(9.3、4.65、2.325 g·kg^(-1))、塞来昔布组(208.2 mg·kg^(-1)),采用气候箱加游泳2周联合膝关节腔注射碘乙酸钠(MIA)建立阳虚寒凝证KOA大鼠模型,连续给药4周,观察各组大鼠一般情况,记录机械刺激缩足痛阈值(PWT)和关节直径,酶联免疫吸附测定法(ELISA)检测大鼠血清白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)、神经生长因子(NGF)和降钙素基因相关肽(CGRP)炎性因子表达;苏木素-伊红(HE)染色观察膝关节滑膜组织病理学改变;蛋白免疫印迹法(Western blot)检测大鼠膝关节滑膜组织TRPV1、p38 MAPK、p-p38 MAPK蛋白表达水平;免疫荧光(IF)测量评估M1/M2巨噬细胞极化情况。结果:与空白组比较,模型组大鼠整体精神状态较差,自主活动减少,体质量偏低,关节直径增加,X射线提示关节边缘骨赘增生,关节面明显粗糙,关节腔间隙明显变窄,大鼠PWT显著降低(P<0.01),大鼠血清IL-1β、TNF-α、CGRP、NGF含量均显著升高(P<0.01),滑膜Krenn评分显著升高(P<0.01),TRPV1、p-p38 MAPK/p38 MAPK蛋白表达显著升高(P<0.01),M1巨噬细胞占比和M1/M2显著升高(P<0.01),M2巨噬细胞占比显著降低(P<0.01);与模型组比较,黄五甘附膏低、中、高剂量体质量有不同程度上升(P<0.05,P<0.01),黄五甘附膏高剂量组和塞来昔布组大鼠膝关节直径减少(P<0.01),黄五甘附膏高、中剂量组PWT恢复较为明显(P<0.05),各给药组大鼠血清IL-1β和CGRP的含量都显著降低(P<0.01),塞来昔布组和黄五甘附膏高剂量组大鼠血清TNF-α含量明显降低(P<0.05),黄五甘附膏中剂量组大鼠血清NGF含量明显降低(P<0.05),黄五甘附膏高剂量组滑膜Krenn评分明显降低(P<0.05),黄五甘附膏各剂量组大鼠滑膜组织中TRPV1和p-p38 MAPK/p38 MAPK蛋白表达都显著下降(P<0.01),塞来昔布组和黄五甘附膏各剂量组滑膜组织中M1巨噬细胞占比均降低(P<0.01),黄五甘附膏高剂量组M2巨噬细胞占比升高(P<0.05),黄五甘附膏中、高剂量M1/M2降低(P<0.05)。结论:黄五甘附膏可通过调控巨噬细胞极化减轻KOA炎症反应,减少炎性疼痛介质释放,同时还降低了TRPV1蛋白表达,其机制可能与p38 MAPK信号通路有关,从而达到改善KOA外周痛敏的效应。

关键词：黄五甘附膏膝骨关节炎瞬时受体电位锚蛋白1(TRPV1) 巨噬细胞极化黄芪桂枝五物汤甘草附子汤

同方期刊数据库

Restraining the escape of lattice oxygen enables superior cyclic performance towards high-voltage Ni-rich cathodes

在线全文

学校读者我要写书评

暂无评论

National Science Review 2023年第1期10卷 277-287页

作者： Haifeng Yu Huawei Zhu hongliang jiang Xiaozhi Su Yanjie Hu Hao jiang Chunzhong Li Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Chemical Engineering East China University of Science and Technology Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences

Layered Ni-rich cathodes,operating at high voltage with superior cyclic performance,are required to develop future high-energy Li-ion ***,the worst lattice oxygen escape at the high-voltage region easily causes structural instability,rapid capacity fading and safety issues upon ***,we report a dual-track strategy to fully restrain the escape of lattice oxygen from Ni-rich cathodes within 2.7-4.5 V by one-step Ta doping and CeO2coating according to their different diffusion energy *** doped Ta can alleviate the charge compensation of oxygen anions as a positive charge centre to reduce the lattice oxygen escape and induce the formation of elongated primary particles,significantly inhibiting microcrack generation and ***,the layer of CeO2coating effectively captures the remaining escaped oxygen and then the captured oxygen feeds back into the lattice during subsequent *** resultant Ni-rich cathode enables a capacity of 231.3 mAh g-1with a high initial coulombic efficiency of 93.5%.A pouch-type full cell comprising this cathode and a graphite anode exhibits>1000 times life cycles at 1C in the 2.7-4.5 V range,with 90.9% capacity retention.

关键词： Ni-rich cathode lattice oxygen dual modification long cycle life Li-ion battery

单原子修饰原子簇的多配位Cu基催化剂上CO_(2)高选择性电还原CO的研究

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2024年第4期59卷 324-333页

作者：王超琛葛旺鑫唐雷齐宴宾董磊江宏亮沈建华朱以华李春忠华东理工大学材料科学与工程学院上海多级结构纳米材料工程技术研究中心超细材料制备与应用教育部重点实验室上海200237 华东理工大学化工学院上海200237

随着可再生能源发电成本的持续下降和电催化技术的迅猛发展,人们开始重新审视能源燃料和化学品的生产方式.近年来,H2O和CO_(2)等小分子的电催化转化反应已成为研究热点.特别是,CO_(2)还原反应(CO_(2)RR)作为将CO_(2)电化学还原为高附加... 详细信息

随着可再生能源发电成本的持续下降和电催化技术的迅猛发展,人们开始重新审视能源燃料和化学品的生产方式.近年来,H2O和CO_(2)等小分子的电催化转化反应已成为研究热点.特别是,CO_(2)还原反应(CO_(2)RR)作为将CO_(2)电化学还原为高附加值产品的一项变革性的技术,备受关注.在CO_(2)RR的众多产物中,CO具有重要的地位,它可以通过费托合成工艺直接用于合成醇、醛、酮、酸及烃等化工产品.然而,将CO_(2)电催化转化为CO在整体效率方面仍面临诸多挑战.因此,设计并制备高效、经济且耐用的电催化剂已成为CO_(2)RR领域发展的研究重点.本文采用简单的配体辅助负载策略制备了铜单原子修饰的铜原子簇催化剂(Cu SA/ACs).球差校正的高角度环形暗场扫描透射电子显微镜结果表明,铜以单原子和原子簇的形式存在.采用X射线吸收精细结构谱和X射线光电子能谱(XPS)分析了铜原子的电子和配位结构,证明了Cu-N键和Cu-Cu键的存在.电化学性能测试表明,与铜单原子催化剂(Cu SACs)相比,Cu SA/ACs催化剂展现了较好的CO_(2)RR性能,其CO的转化法拉第效率从27.15%提高到98.94%,电流密度是Cu SACs的3.6倍.此外,将该催化剂组装成流动电解池,在600 mA cm-2的高电流密度下,CO选择性达到93.06%,阴极的最高能量效率达61.9%,优于大多数CO_(2)还原制备CO的催化剂.为了明确铜单原子组分引入对铜原子簇性能提升的原因,通过电化学原位红外光谱研究催化剂在服役条件下的表面物种吸附.结果表明,Cu SACs催化剂的单原子活性中心在CO_(2)RR过程中受到H2析出反应的困扰,活性中心表面的吸附物种主要为H2O而不是CO_(2),从而导致CO_(2)还原性能较差;在Cu SA/ACs催化剂表面,其活性中心由单原子和原子簇协同组成,CO_(2)主要吸附在原子簇上,单原子和原子簇协同作用促进了H2O的解离过程,为CO_(2)质子化提供丰富的活性氢,进一步加快CO_(2)RR的反应动力学.密度泛函计算和差分电荷密度分析结果表明,单原子的引入优化了原子簇的局域电子结构,诱导d带中心靠近费米能级,从而优化了*COOH中间体的形成能和CO的脱附过程.综上,本文通过合理的活性位点设计实现了多位点的耦合协同,提升了铜基催化剂对于CO_(2)RR的催化活性,优化了铜基催化剂上CO_(2)到CO的选择性,通过机理研究加深了对铜基催化剂上CO_(2)转化模式的认识,为设计高效催化剂提供新思路.

关键词：二氧化碳还原活性位点协同作用单原子原子簇电催化

Scalable solid-phase synthesis of defect-rich graphene for oxygen reduction electrocatalysis

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2023年第1期8卷 224-232页

作者： Chunxiao Dong Li Yang Cheng Lian Xiaoling Yang Yihua Zhu hongliang jiang Chunzhong Li Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China Key Laboratory for Ultrafine Materials of Ministry of Education School of Chemical EngineeringEast China University of Science and TechnologyShanghai200237China Institutes of Physical Science and Information Technology Anhui UniversityHefeiAnhui230601China School of Chemistry and Molecular Engineering East China University of Science and TechnologyShanghai200237China

Defect-engineered carbon materials have been emerged as promising electrocatalysts for oxygen reduction reaction(ORR)in metal-air *** a facile strategy for the preparation of highly active nanocarbon electrocatalysts remains ***,a low-cost and simple route is developed to synthesize defective graphene by pyrolyzing the mixture of glucose and carbon *** dynamics simulations reveal that the graphene formation is ascribed to two-dimensional layered feature of carbon nitride,and high compatibility of carbon nitride/glucose *** measurements suggest that the graphene possesses rich edge and topological *** graphene catalyst exhibits higher power density than commercial Pt/C catalyst in a primary Zn-air *** experimental results and theoretical thermodynamic analysis,it is identified that graphitic nitrogen-modified topological defects at carbon framework edges are responsible for the decent ORR *** strategy presented in this work can be can be scaled up readily to fabricate defective carbon materials.

关键词： Carbon materials Electrocatalysis Oxygen reduction reaction Solid-phase synthesis Zn-air battery

Steering structural mesoporosity and working microenvironment of Fe-N-C catalysts for boosting cathodic mass transport of zinc-air batteries

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2022年第8期65卷 1670-1678页

作者： Hang Shen Yanyan Jia Yanbin Qi Sheng Dai hongliang jiang Yihua Zhu Chunzhong Li Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory for Ultrafine Materials of Ministry of Education School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Institute of Fine ChemicalsSchool of Chemistry&Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

Transition metal-N-C materials have considerably been demonstrated as promising catalysts for cathodic oxygen reduction reaction(ORR)in Zn-air *** efforts mainly focus on tailoring coordination structure and identifying active sites of metal-N-C materials for ORR,while the mass transport of metal-N-C employed in catalytic layers of working electrodes is seldom ***,a Fe-N-C single-atom catalyst featuring high mesoporosity and abundant electrochemically accessible active sites is developed through post-loading Fe species into defective N-doped carbon *** Fe-N-C single-atom catalyst serving as the air cathode of Zn-air battery delivers a peak power density of 189.9 mW cm^(−2),significantly larger than 114.2 mW cm^(−2) of commercial Pt/C and 162.9 mW cm^(−2) of the Fe-N-C contrast catalyst with low *** importantly,through adding hydrophobic polytetrafluoroethylene(PTFE)nanoparticles in the catalytic layer of air cathode,the peak power density of Fe-N-C single-atom catalyst is further increased to 212.3 mW cm^(−2).The increased peak power density is attributed to the enhancement of O_(2) mass transport,as evidenced by a substantially decreased diffusion layer thickness that is obtained from electrochemical impedance spectroscopy.

关键词： electrocatalysis oxygen reduction reaction single-atom catalyst mass transport Zn-air batteries

在线全文

学校读者我要写书评

暂无评论

医疗机构制剂补肾生精片质量标准提升研究

中国医药科学 2024年第3期14卷 71-74页

作者：陈宗文陈燕颜卢伟宁江洪亮广东省高州市中医院制剂科广东高州525200

目的优化潘茂名验方医院制剂注册申请品种补肾生精片的质量标准。方法采用薄层色谱法(TLC)对补肾生精片中君臣药味淫羊藿、盐巴戟天、熟地黄进行定性鉴别。采用高效液相色谱法(HPLC)对补肾生精片中有效成分淫羊藿苷进行含量测定。结果... 详细信息

目的优化潘茂名验方医院制剂注册申请品种补肾生精片的质量标准。方法采用薄层色谱法(TLC)对补肾生精片中君臣药味淫羊藿、盐巴戟天、熟地黄进行定性鉴别。采用高效液相色谱法(HPLC)对补肾生精片中有效成分淫羊藿苷进行含量测定。结果定性鉴别中淫羊藿、盐巴戟天、熟地黄三味药材的薄层斑点清晰,分离度好,且阴性对照无干扰。定量检测中淫羊藿苷在0.025~0.300 mg/ml区间内呈良好的线性关系(线性回归方程为y=13524.5915x-22.6651,R^(2)=0.9999),加样回收率为103.51%(RSD=1.44%)。结论补肾生精片优化后的质量标准方法简单可行,结果稳定可靠,重复性好,能够很好地用于实际生产中该制剂品种的质量控制。

关键词：潘茂名验方补肾生精片质量标准质量控制

维普期刊数据库博看期刊

Redirecting dynamic structural evolution of nickel-contained RuO_(2) catalyst during electrochemical oxygen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第6期31卷 330-337,I0009页

作者： Yuhan Zhao Menghua Xi Yanbin Qi Xuedi Sheng Pengfei Tian Yihua Zhu Xiaoling Yang Chunzhong Li hongliang jiang Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory for Ultrafine Materials of Ministry of Education School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China

Electrochemical oxygen evolution reaction (OER) is a main efficiency bottleneck of water *** ruthenium oxide (RuO_(2)) catalyst displays remarkable activities but poor stability for *** instability stems from lattice oxygen oxidation,resulting in the oxidation of Ru^(4+) to soluble Ru^(4+)(x>4) ***,we redirect dynamic structural evolution of Ru-based catalysts through introducing oxidized nickel (Ni) *** virtue of comprehensive structural characterizations,such as high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM),X-ray photoelectron spectroscopy (XPS),operando Raman and so forth,it is demonstrated that when the atomic content of Ni exceeds that of ruthenium (Ru),the Ni components can efficiently inhibit the Ru^(4+) oxidation and structural *** functional theory (DFT) calculations suggest that the introduction of Ni component hinders the formation of oxygen vacancies,and makes lattice oxygen mediated mechanism turn to adsorbate evolution mechanism,which eventually improves the *** optimized nickel-contained RuO_(2) catalyst delivers an effective reactivity with an overpotential of less than 215 m V to attain 10 m A cm^(-2) and remarkable stability with only 5 mV increment after 5000 potential *** work provides insights into the origin of dynamic structural evolution of transition-metalmodified RuO_(2) electrocatalysts.

关键词： Oxygen evolution reaction Ruthenium Structure evolution Electrocatalysis Operando Raman

在线全文

学校读者我要写书评

暂无评论

装甲车辆发动机故障诊断与健康监测研究进展

机电工程技术 2024年第4期53卷 11-15,29页

作者：江宏亮杨红军刘维胡佳俊唐字强 32256部队湖南郴州423026

装甲车辆发动机故障诊断与健康监测是提高装甲车辆发动机安全性、可靠性以及经济性的关键技术,是实现发动机视情维修的重要方法之一。分析了装甲车辆发动机故障诊断系统研究现状以及监测难点,从振动分析法、噪声分析法,油液监测法、热... 详细信息

装甲车辆发动机故障诊断与健康监测是提高装甲车辆发动机安全性、可靠性以及经济性的关键技术,是实现发动机视情维修的重要方法之一。分析了装甲车辆发动机故障诊断系统研究现状以及监测难点,从振动分析法、噪声分析法,油液监测法、热力性能参数法和瞬时转速诊断法方面详细论述了综述了发展现状。对装甲车辆发动机故障诊断技术发展方向进行了探讨,旨在为相关设计人员与研究人员提供参考,从而更好地保障装甲车辆安全、稳定、高效使用。

关键词：装甲车辆发动机故障诊断研究进展

维普期刊数据库博看期刊