检索结果-南通市图书馆

Bimetallic selenide heterostructure with directional built-in electricfield confined in N-doped carbon nanofibers for superior sodium storage with ultralong lifespan

引用

Journal of Energy Chemistry 2024年第4期91卷 407-416页

作者： Junying Weng Degui Zou Wenyong Yuan Pengfei Zhou minghui ding Jin Zhou Hailin Cong Fangyi Cheng School of Materials Science and Engineering Shandong University of TechnologyZibo 255000ShandongChina School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255000ShandongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Constructing heterostructure is considered as an effective strategy to address the sluggish electronic and ionic kinetics of anode materials for sodium ion batteries(SIBs).However,realizing the orientated growth and uniform distribution of the heterostructure is still a great ***,the regulated novel CoSe_(2)/NiSe_(2)heterostructure confined in N-doped carbon nanofibers(CoSe_(2)/NiSe_(2)@N-C)are prepared by using Co/Ni-ZIF template,in which,the CoSe_(2)/NiSe_(2)heterostructures realize uniform distribution on a micro *** from the unique heterostructure and N-doped carbon nanofibers,the CoSe_(2)/NiSe_(2)@N-C deliveries superior rate capability and durable cycle lifespan with a reversible capacity of 400.5 mA h g^(-1)after 5000 cycles at 2 A g^(-1).The Na-ion full battery with CoSe_(2)/NiSe_(2)@N-C anode and layered oxide cathode displays a remarkable energy density of 563 W h kg^(-1)with 241.1 W kg^(-1)at 0.1 A g^(-1).The theoretical calculations disclose that the periodic and directional built-in electric-field along with the heterointerfaces of CoSe_(2)/NiSe_(2)@N-C can accelerate electrochemical reaction *** in(ex)situ experimental measurements reveal the reversible conversion reaction and stable structure of CoSe_(2)/NiSe_(2)@N-C during Na+insertion/*** study highlights the potential ability of precisely controlled heterostructure to stimulate the electrochemical performances of advanced anode for SIBs.

关键词： CoSe_(2)/NiSe_(2) heterostructure Built-in electric-field Rate capability Ultralong lifespan Sodium ion batteries

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

北京地铁智慧车辆段方案研究

引用

智慧轨道交通 2024年第1期61卷 61-67,84页

作者：丁明辉魏运朱鸿涛侯思亦北京市地铁运营有限公司北京100044

地铁车辆段是地铁列车的停放、日常保养、检修基地,同时还具备车辆救援、办公综合、材料供应等重要功能。当地铁列车结束运营或出现特殊状况时,都会返回车辆段进行“体检”或“治疗”,为安全运营做充分准备。随着北京地铁的高速发展,为... 详细信息

地铁车辆段是地铁列车的停放、日常保养、检修基地,同时还具备车辆救援、办公综合、材料供应等重要功能。当地铁列车结束运营或出现特殊状况时,都会返回车辆段进行“体检”或“治疗”,为安全运营做充分准备。随着北京地铁的高速发展,为应对不断增长的列车数量和客流量,车辆段的运维检修、调度运行、生产管控压力持续增大。本文在分析传统地铁车辆段运营现状的基础上,介绍了地铁智慧车辆段的定义与业务功能。结合北京地铁智慧车辆段建设需求,以车辆运维和设备维护为核心,开展北京地铁智慧车辆段方案的顶层需求分析,研究面向生产调度、检修维护和综合管控的车辆段智慧化提升技术,在保证车辆段安全稳定运营的前提下,提出了涵盖调度运行智能化、运维检修信息化、综合管控数字化的智慧车辆段方案,既能降低运维成本能提高运维管理效率,建立可推广、可复制的车辆段建设管理模式,可促进运维水平持续提升,助力“智慧城轨”建设再上新台阶。

关键词：智慧车辆段生产调度检修维护综合管控智慧城轨

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enhancing mechanisms of N-doped biomass carbon on the vanadium-based catalyst for furan degradation at low temperature

引用

Waste Disposal and Sustainable Energy 2024年第1期6卷 1-9页

作者： Ling Wang minghui Tang Hongxian Li Jiamin ding Juan Qiu Shengyong Lu State Key Laboratory of Clean Energy Utilization Zhejiang University38#Zheda RoadHangzhou310027China Taizhou Institute of Zhejiang University Taizhou318012China Qingshanhu Energy Research Center Zhejiang University1699 Dayuan RoadQingshanhu Science and Technology CityHangzhou311300China

Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans(PCDD/Fs)have attracted widespread concern due to their high toxicity,and their difficult manipulation in laboratories has made the research process ***,in our work,furan is selected as the model compound owing to the same structure of a central oxygenate *** catalytic oxidation is regarded as an effective and applicable method for the abatement of PCDD/Fs,the synthesis of low-temperature catalysts is still a challenging problem in practical *** this situation,we prepared a novel V_(2)O_(5)/TiO_(2)catalyst modified with N-doped hierarchical porous carbon(NHPC)via a wet impregnation *** V/T-1%NHPC catalyst could achieve expectant low-temperature performances with 50%furan conversion at 150℃and a complete conversion at 200℃,which decreased 23℃and 40℃compared to the V/T catalyst ***,the addition of NHPC presented lifting chemical stability during long-time *** addition of NHPC in V/T catalysts decreased the formation of crystalline V_(2)O_(5) and increased the percentages of V^(5+)and O_(lat),which improved the utilization of vanadium ions and the catalytic ***,the higher binding energy shift of O_(lat) implied more reaction possibility with other oxidise ***,this work proved the lifting catalytic activity by the interaction between catalysts and NHPC,and proposed the promoting effects of the N *** results showed that the content of the pyridinic N and graphitic N in NHPC changed after combining with V/T catalyst,which played crucial roles in the excellent catalytic ***,this work provides comprehensive research of the V/T-1%NHPC catalyst toward furan oxidation at low temperature and explain the effects of N-doped biomass carbon in catalytic activity clearly,which gave a new thought to design low-temperature catalysts in PCDD/Fs ***,the internal functional mech

关键词： Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans Furan Low-temperature catalyst V_(2)O_(5)/TiO_(2)catalyst N-doped

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Investigation of Ce/BEA as a passive NO_(x)adsorber:*** occurrences of cerium and adsorption behavior

引用

Journal of Rare Earths 2024年第7期42卷 1265-1271,I0003页

作者： minghui Yu Yiying ding Xiaojie Yu Siwei Yan Meiqing Shen Jianqiang Wang Jun Wang Gurong Shen School of Materials Science and Engineering Tianjin UniversityTianjin300350China School of Chemical Engineering and Technology Tianjin UniversityTianjin300350China National Rare Earth Catalysis Research Institute Dongying257000China

Ce/BEA has great potential as a passive NO_(x)absorber(PNA)to reduce the NO_(x)emissions during the cold start phase especially in diesel engine for its high resistance to CO and suitable NO_(x)desorption temperature ***,as a novel material,its physical and chemical properties still remain *** this work,Ce/BEA was synthesized by ion-exchange method to identify the active species in NO_(x)adsorption,compared with aggregated Ce species in Ce/SiAlOx prepared by impregnation method.X-ray diffraction(XRD),high resolution-transmission electron microscopy(HR-TEM)and aberration-corrected-scanning transmission electron microscopy(AC-STEM)were performed to confirm the isolated single atom formation of Ce species in Ce/***-vis diffraction reflection spectra(DRS)and X-ray photoelectron spectroscopy(XPS)were conducted to find the difference of chemical environment between the isolated Ce species and aggregated *** performance evaluation and temperature programmed reduction of hydrogen(H_(2)-TPR)results show the high NO_(x)storage capacity and active oxygen species quantity in Ce/*** is also found that the main NO_(x)adsorption species are Ce4+-O^(∗)rather than Ce^(3+).NO_(x)-diffuse reflectance infrared Fourier transform spectroscopy(NO_(x)-DRIFTS)confirms that the bidentate nitrite species are the critical NO_(x)adsorption intermediates and the conception of NO_(x)adsorption and desorption processes is proposed.

关键词： Passive NO_(x)absorber Ce/BEA Isolated Ce species Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于OPG/RANKL/RANK信号通路探讨桂枝芍药知母汤对胶原诱导性关节炎大鼠的影响

引用

北京中医药大学学报 2024年第1期47卷 70-80页

作者：杨双庆马俊福孟庆良丁明辉刘亚伟张苏丹王妍琦李锦锦李玉洁冼锦忠河南中医药大学骨伤学院郑州450046 河南省中医院西安市第五医院

目的基于护骨因子(OPG)/NF-κB受体激活蛋白配体(RANKL)/NF-κB受体激活蛋白(RANK)信号通路探究桂枝芍药知母汤对胶原诱导性关节炎(CIA)大鼠骨破坏与骨保护相关因子的影响。方法60只雌性Wistar大鼠按照体质量随机分为6组,正常组、模型... 详细信息

目的基于护骨因子(OPG)/NF-κB受体激活蛋白配体(RANKL)/NF-κB受体激活蛋白(RANK)信号通路探究桂枝芍药知母汤对胶原诱导性关节炎(CIA)大鼠骨破坏与骨保护相关因子的影响。方法60只雌性Wistar大鼠按照体质量随机分为6组,正常组、模型组、雷公藤多苷组(0.01 g/kg)、桂枝芍药知母汤低剂量组(8.6 g/kg)、桂枝芍药知母汤中剂量组(17.2 g/kg)、桂枝芍药知母汤高剂量组(34.4 g/kg),每组10只。除正常组外,其他大鼠第1、8天使用牛Ⅱ型胶原蛋白(100μg)复制CIA模型,在大鼠左足足底和尾根部位注射。造模成功后灌胃给药4周。监测大鼠一般状态、体质量及关节炎指数(AI)评分,酶联免疫吸附测定法检测大鼠血清中RANKL、OPG的含量,实时荧光PCR法与蛋白质印迹法分别测定踝关节中RANKL、RANK、OPG mRNA与蛋白表达水平。结果与正常组比较,模型组一般状态欠佳,足趾肿胀明显,AI评分升高,血清RANKL含量升高、OPG含量降低,踝关节RANKL、RANK mRNA与蛋白表达均升高(均P<0.05)。与模型组比较,桂枝芍药知母汤各剂量组大鼠足趾肿胀程度与AI评分下降,血清RANKL含量降低、OPG含量升高,踝关节中RANKL、RANK mRNA与蛋白表达均降低,OPG mRNA与蛋白表达均升高,踝关节RANKL/OPG值降低(均P<0.05)。结论桂枝芍药知母汤能够改善CIA模型大鼠关节的骨破坏情况,其作用机制可能与降低RANKL水平、降低RANKL/OPG值、调控骨平衡有关。

关键词：桂枝芍药知母汤护骨因子/NF-κB受体激活蛋白配体/NF-κB受体激活蛋白信号通路胶原诱导性关节炎骨代谢骨平衡大鼠

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microstructure and Properties of Low-pressure Cold Sprayed Al-based Composite Coatings on Magnesium Alloy Surface

引用

上海航天（中英文） 2022年第1期39卷 84-91页

作者： LIU Hongjin ding minghui WANG Haoxuan YAN Pengwei College of Materials Science and Chemical Engineering Harbin Engineering UniversityHarbin 150001HeilongjiangChina

Pure Al and Al-30%Al_(2)O_(3)composite coatings are prepared on the surface of AZ31B magnesium alloy by low-pressure cold *** morphology and structure of the coatings are analyzed by scanning electron microscope (SEM),energy dispersive spectroscopy (EDS),and X-ray diffraction (XRD),and the effects of the addition of Al_(2)O_(3)on the microstructure of the Al-based coatings are *** mechanical properties and corrosion resistance of the coatings are fully evaluated by the micro-hardness tester,electronic tensile machine,and electrochemical *** results show that the coating structure is more uniform and denser,and the porosity is significantly reduced after the addition of Al_(2)O_(3).The interfaces between the coatings and the magnesium alloy substrate are distinct,and the coatings and the substrate are mechanically *** with the pure Al coating,the microhardness of the Al-Al_(2)O_(3)composite coating is increased to 61.1 HV_(0.2),and the bonding strength reaches above 53.1 *** self-corrosion potential of the two coatings is higher than that of the magnesium alloy,and the self-corrosion current density is significantly lower than that of the magnesium alloy *** Al-based coatings prepared by low-pressure cold spraying have high hardness,good bonding strength,and good corrosion resistance,which can be used for the repair and protection of magnesium alloy structural parts.

关键词： Al Al-Al_(2)O_(3) low-pressure cold spray mechanical property corrosion resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

桂枝芍药知母汤抑制cGAS/STING/NF-κB通路对类风湿关节炎大鼠炎症活动的影响

引用

现代中西医结合杂志 2024年第8期33卷 1053-1059页

作者：丁明辉曹茸徐鹏刚任宝娣李映雪吕水英马俊福西安市第五医院陕西西安710082 河南省中医院河南郑州450002

目的基于环状GMP-AMP合成酶(cGAS)/干扰素基因刺激因子(STING)/核因子-κB(NF-κB)通路探讨桂枝芍药知母汤对类风湿关节炎大鼠炎症活动的影响及机制。方法取70只Wistar大鼠,随机选择10只作为正常组,其余60只大鼠制备胶原诱导性关节炎模... 详细信息

目的基于环状GMP-AMP合成酶(cGAS)/干扰素基因刺激因子(STING)/核因子-κB(NF-κB)通路探讨桂枝芍药知母汤对类风湿关节炎大鼠炎症活动的影响及机制。方法取70只Wistar大鼠,随机选择10只作为正常组,其余60只大鼠制备胶原诱导性关节炎模型。将造模成功大鼠随机分为模型组、甲氨蝶呤组、雷公藤组及桂芍知母汤低、中、高剂量组,每组10只。甲氨蝶呤组给予0.104 mg/mL的甲氨蝶呤片混悬液灌胃,1次/周,其余时间每天给予蒸馏水灌胃1次;雷公藤组给予0.625 mg/mL的雷公藤多甙片混悬液灌胃,桂芍知母汤低、中、高剂量组分别给予0.958 g/mL、1.916 g/mL、2.874 g/mL的桂枝芍药知母汤灌胃,正常组、模型组给予蒸馏水灌胃,均1次/d。各组均干预4周。测量各组大鼠干预1,2,3,4周末足趾肿胀程度,并计算关节炎指数(AI);末次干预结束后,ELISA法检测血清白细胞介素-1β(IL-1β)、白细胞介素-17(IL-17)、肿瘤坏死因子-α(TNF-α)水平,Western blot法检测滑膜组织中cGAS、STING、NF-κB p65、IκBα蛋白表达情况。结果干预1,2,3,4周末,模型组大鼠的关节肿胀度均明显高于正常组(P均0.05);干预2,3,4周末,桂芍知母汤高剂量组AI评分均明显低于模型组和桂芍知母汤低剂量组(P均<0.05),且桂芍知母汤高剂量组干预2周末的AI评分明显低于雷公藤组(P<0.05);干预3周末,甲氨蝶呤组、桂芍知母汤中剂量组AI评分均明显低于模型组(P均<0.05);干预4周末,甲氨蝶呤组、雷公藤组、桂芍知母汤中剂量组、桂芍知母汤低剂量组AI评分均明显低于模型组(P均<0.05)。与正常组比较,模型组血清IL-1β、IL-17、TNF-α水平及滑膜组织中cGAS、STING、NF-κB p65蛋白相对表达量均明显升高(P均<0.05),滑膜组织中IκBα蛋白相对表达量明显降低(P<0.05);与模型组比较,各药物干预组血清IL-1β、IL-17、TNF-α水平及滑膜组织中cGAS、STING、NF-κB p65蛋白相对表达量均明显降低(P均<0.05),滑膜组织中IκBα蛋白相对表达量均明显升高(P均<0.05)。桂芍知母汤高剂量组和甲氨蝶呤组血清IL-1β、IL-17和TNF-α水平及滑膜组织中cGAS、STING、NF-κB p65蛋白相对表达量均明显低于桂芍知母汤低剂量组(P均<0.05),滑膜组织中IκBα蛋白相对表达量均明显高于桂芍知母汤低剂量组(P均<0.05)。结论桂枝芍药知母汤可明显减轻类风湿关节炎大鼠关节肿胀和关节炎症,机制可能与抑制cGAS/STING/NF-κB通路,降低炎症因子水平有关。

关键词：类风湿关节炎桂枝芍药知母汤环状GMP-AMP合成酶(cGAS)/干扰素基因刺激因子(STING)/核因子-κB通路关节炎指数

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Optimization for epitaxial fabrication of infinite-layer nickelate superconductors

引用

Frontiers of physics 2024年第3期19卷 61-69页

作者： minghui Xu Yan Zhao Xiang ding Huaqian Leng Shu Zhang Jie Gong Haiyan Xiao Xiaotao Zu Huiqian Luo Ke-Jin Zhou Bing Huang Liang Qiao School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China Beijing Computational Science Research Center Beijing 100193China Diamond Light Source Harwell CampusDidcot OX110DEUnited Kingdom Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

The discovery of nickelates superconductor creates exciting opportunities to unconventional superconductivity. However, its synthesis is challenging and only a few groups worldwide can obtain samples with zero-resistance. This problem becomes the major barrier for this field. From plume dynamics perspective, we found the synthesis of superconducting nickelates is a complex process and the challenge is twofold, i.e., how to stabilize an ideal infinite-layer structure Nd_(0.8)Sr_(0.2)NiO_(2), and then how to make Nd_(0.8)Sr_(0.2)NiO_(2) superconducting? The competition between perovskite Nd_(0.8)Sr_(0.2)NiO_(3) and Ruddlesden−Popper defect phase is crucial for obtaining infinite-layer structure. Due to inequivalent angular distributions of condensate during laser ablation, the laser energy density is critical to obtain phase-pure Nd_(0.8)Sr_(0.2)NiO_(3). However, for obtaining superconductivity, both laser energy density and substrate temperature are very important. We also demonstrate the superconducting Nd_(0.8)Sr_(0.2)NiO_(2) epitaxial film is very stable in ambient conditions up to 512 days. Our results provide important insights for fabrication of superconducting infinite-layer nickelates towards future device applications.

关键词： nickelate superconductivity infinite-layer plasma condensate plume dynamics

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

HfO_(x)N_(1-x)涂层的制备、组织及性能研究

引用

稀有金属 2022年第10期46卷 1287-1297页

作者：王力丁明惠李新林银川能源学院化学与生物工程学院宁夏银川750105 哈尔滨工程大学材料科学与化学工程学院黑龙江哈尔滨150001

医用316L不锈钢以其良好的力学性能和耐腐蚀性能及较低的成本,广泛应用于医疗领域。但是,在生物环境中,医用316L不锈钢存在易腐蚀、析出有害离子以及生物相容性差等问题。目前,磁控溅射是主流的物理气相沉积(PVD)表面处理技术之一,其制... 详细信息

医用316L不锈钢以其良好的力学性能和耐腐蚀性能及较低的成本,广泛应用于医疗领域。但是,在生物环境中,医用316L不锈钢存在易腐蚀、析出有害离子以及生物相容性差等问题。目前,磁控溅射是主流的物理气相沉积(PVD)表面处理技术之一,其制备的涂层具有结合性能强和致密度高等优点。因此,采用射频磁控溅射技术在316L不锈钢表面成功制备HfO_(x)N_(1-x)涂层并探究涂层中氧(O)含量对HfO_(x)N_(1-x)涂层微观结构、力学性能和电化学性能的影响,并最终评价了涂层的血液相容性。微观结构测试结果表明,涂层中O含量对涂层晶体结构有显著影响,随着O含量的降低,涂层晶体结构由HfO_(2)相转变为Hf_(2)ON_(2)相并最终转变为非晶相。力学性能和电化学性能测试结果表明当涂层中O含量占比(f_(O))为0.14(HfON-3)时所制备涂层的力学性能及耐腐蚀性能最佳。血液相容性测试结果表明涂层的血液相容性与其表面粗糙度及涂层成分有关。以上研究结果表明HfO_(x)N_(1-x)涂层的性能较316L不锈钢更为优异,具备作为医用植入体表面涂层的应用潜力。

关键词： HfO_(x)N_(1-x)涂层微观结构力学性能耐腐蚀性能血液相容性

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

张量TTr1SVD的随机算法

引用

中国海洋大学学报（自然科学版） 2023年第S1期53卷 190-198页

作者：丁明慧解朋朋中国海洋大学数学科学学院山东青岛266100

张量序列秩-1奇异值分解(TTr1SVD)自然地将奇异值分解(SVD)推广到张量层面,将任意实张量分解为标准正交秩-1外积的有限和。基于其具有已知数量上限的正交秩-1外积项和易于截断误差量化的良好性质,本文首先给出了一种有利于张量分解和还... 详细信息

张量序列秩-1奇异值分解(TTr1SVD)自然地将奇异值分解(SVD)推广到张量层面,将任意实张量分解为标准正交秩-1外积的有限和。基于其具有已知数量上限的正交秩-1外积项和易于截断误差量化的良好性质,本文首先给出了一种有利于张量分解和还原的表达形式,并提出了保持分解形式的截断TTr1SVD算法,在固定精度的同时大大降低了计算成本。受低秩矩阵逼近的随机算法的启发,本文还开发了针对固定精度问题的高效随机TTr1SVD算法。最后,给出的数值例子展现了所提算法在数据逼近和压缩方面的应用前景。

关键词： TTr1SVD 奇异值分解截断固定精度问题随机算法

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：