检索结果-南通市图书馆

Progress in Natural Science:Materials International 2024年第5期34卷 1057-1065页

作者： Ziming Wang Hanbo Wang dongyu pei Sheng Wan Yan Wang Mingrui Yu Haiyan Lu College of Chemistry Jilin University Key Laboratory of Physics and Technology for Advanced Batteries Ministry of Education Jilin University Zhuhai Zhongli New Energy Sci-Tech Co. Ltd.

Nanostructuring has shown promise in enhancing the performance of MnO2for energy storage in supercapacitors,highlighting its technological significance. This study introduces an innovative synthesis method, employing hydrothermal and constant-pressure deposition techniques, to produce nanostructured MnO2/MnS rod electrodes on nickel foam. The roded heterostructure enhances specific surface area, conductivity, and symbiotic effect between MnO2and MnS. With optimized material and structural advantages, the electrode reaches a capacitance of 977.6 F g-1at 1 A g-1, demonstrating extended cycling lifespan. Using MnO2/MnS-5h rods as the positive electrode and activated carbon as the negative electrode, the supercapacitor achieves an energy density of 122.23Wh kg-1at 898.75 W kg-1. Notably, it maintains 91.55 % capacity retention after 5000 cycles at 10 A g-1,indicating outstanding cycling stability. This research presents a promising solution for efficient energy storage,emphasizing the potential application of the developed MnO2/MnS based supercapacitor in high-performance energy storage systems.

关键词： High energy density Nanostructured MnO2/MnS2 rod Outstanding cycling stability Supercapacitors

Refinement of structural characteristics and supercapacitor performance of MnO2 nanosheets via CTAB-assisted electrodeposition

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2023年第6期33卷 881-890页

作者： Ziming Wang Hanbo Wang dongyu pei Sheng Wan Zhitian Fan Mingrui Yu Haiyan Lu College of Chemistry Jilin University Key Laboratory of Physics and Technology for Advanced Batteries Ministry of Education Jilin University Zhuhai Zhongli New Energy Sci-Tech Co. Ltd.

MnO2stands out as a highly promising material for electrochemical capacitors due to its impressive theoretical capacitance,cost-effectiveness,eco-friendliness,and abundant natural ***,its inherent low conductivity and structural fragility result in restricted specific capacitance and a shortened cycle life,posing a notable obstacle to its *** the introduction of CTAB(cetyltrimethylammonium bromide),we successfully tailored the surface morphology of the electrode material,yielding a robust and highly conductive layered MnO2electrode *** MnO2/CTAB composite synthesized through a simple electrodeposition method exhibits outstanding performance,achieving a specific capacitance of 665 F g-1at 1 A *** after30,000 cycles,it maintains 92.13% *** performance improvement is primarily attributed to increased conductivity,and additional electrochemically active ***,the assembled MnO2/CTAB//AC capacitor(ACs) achieves a specific capacitance of 70.06 F g-1at 1 A g-1,operating at a voltage of 1.8 *** a power density of 563.36 W kg-1,it reaches an energy density of 35.21 Wh *** work provides an effective approach for high-performance electrode of supercapacitor.

关键词： Manganese dioxide CTAB Asymmetric capacitor Electrodeposition

Microstructure of Ba_(0.615)Sr_(0.35)Mg_(0.035)TiO_3 dielectric ceramics via X-ray spectrum analysis

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 Science Bulletin 2012年第34期57卷 4510-4512页

作者： QI Wen XUE Tao LI Xuan FANG dongyu LI ChaoLing YAO pei School of Materials Science and Engineering Tianjin UniversityTianjin 300072China Center for Analysis Tianjin UniversityTianjin 300072China

The compound Ba0.615Sr0.35Mg0.035TiO3 was analyzed by the X-ray dispersed spectroscopy analyzer (SEM-EDAX) with the spec-trum image method, a powerful tool for chemical phase identification. The method was first time applied on a ceramic material to collect spectrum image and was progressed to identify the Mg-enriched component with fine scale pocket shown in matrix. This result, together with the stoichiometry result obtained from spot mode spectrum analysis, strongly confirmed the microstructure and properties of dielectric materials.

关键词：介质陶瓷频谱分析显微组织 X-射线光谱图像材料收集显示矩阵计量结果

RSPSSL:A novel high-fidelity Raman spectral preprocessing scheme to enhance biomedical applications and chemical resolution visualization

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第2期13卷 366-386页

作者： Jiaqi Hu Gina Jinna Chen Chenlong Xue pei Liang Yanqun Xiang Chuanlun Zhang Xiaokeng Chi Guoying Liu Yanfang Ye dongyu Cui De Zhang Xiaojun yu Hong Dang Wen Zhang Junfan Chen Quan Tang Penglai Guo Ho-Pui Ho Yuchao Li Longqing Cong Perry Ping Shum State Key Laboratory of Optical Fiber and Cable Manufacture Technology Guangdong Key Laboratory of Integrated Optoelectronics IntellisenseDepartment of EEESouthern University of Science and TechnologyShenzhen 518055China College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China Department of Nasopharyngeal Carcinoma Sun Yat-sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and TherapyGuangzhou 510060China Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Nephrology Chaozhou People’s HospitalChaozhou 521011China Clinical Research Design Division Sun Yatsen Memorial HospitalGuangzhouGuangdong 510120China School of Automation Northwestern Polytechnical UniversityXi’anShaanxi 710072China Department of Biomedical Engineering The Chinese University of Hong KongHong KongChina Guangdong Provincial Key Laboratory of Nanophotonic Manipulation Institute of NanophotonicsJinan UniversityGuangzhou 511443China

Raman spectroscopy has tremendous potential for material analysis with its molecular fingerprinting capability in many branches of science and *** is also an emerging omics technique for metabolic profiling to shape precision ***,precisely attributing vibration peaks coupled with specific environmental,instrumental,and specimen noise is *** Raman spectral preprocessing to remove statistical bias noise and sample-related errors should provide a powerful tool for valuable information ***,we propose a novel Raman spectral preprocessing scheme based on self-supervised learning(RSPSSL)with high capacity and spectral *** can preprocess arbitrary Raman spectra without further training at a speed of~1900 spectra per second without human *** experimental data preprocessing trial demonstrated its excellent capacity and signal fidelity with an 88%reduction in root mean square error and a 60%reduction in infinite norm(L__(∞))compared to established *** this advantage,it remarkably enhanced various biomedical applications with a 400%accuracy elevation(ΔAUC)in cancer diagnosis,an average 38%(few-shot)and 242%accuracy improvement in paraquat concentration prediction,and unsealed the chemical resolution of biomedical hyperspectral images,especially in the spectral fingerprint *** precisely preprocessed various Raman spectra from different spectroscopy devices,laboratories,and diverse *** scheme will enable biomedical mechanism screening with the label-free volumetric molecular imaging tool on organism and disease metabolomics profiling with a scenario of high throughput,cross-device,various analyte complexity,and diverse applications.

关键词： spectral scheme resolution

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

光纤激光送丝熔覆修复工艺研究

中国激光 2014年第11期41卷 76-81页

作者：李凯斌李东刘东宇裴广玉上海工程技术大学材料工程学院上海201620

采用光纤激光器在不锈钢表面进行侧向送丝熔覆修复实验，系统地研究了激光工艺参数对熔覆道形貌影响并确定合适的多道搭接率取值范围，为多道多层送丝激光熔覆修复技术应用提供指导。结果表明：影响熔覆道宏观成形和形貌参数的激光工艺... 详细信息

采用光纤激光器在不锈钢表面进行侧向送丝熔覆修复实验，系统地研究了激光工艺参数对熔覆道形貌影响并确定合适的多道搭接率取值范围，为多道多层送丝激光熔覆修复技术应用提供指导。结果表明：影响熔覆道宏观成形和形貌参数的激光工艺参数主要有激光功率、扫描速度和送丝速度，离焦量的影响相对较小，当激光能量密度为100J／mm2，熔丝率为39．44×10^-6g／J时，可得到稳定平滑的熔覆道；合适的搭接率变化范围为45％～53％，此时多道单层熔覆层表面平整度在100μm以下。

关键词：激光技术光纤激光器激光熔覆修复工艺参数

在线全文

学校读者我要写书评

暂无评论

纳米复合改性沥青混合料路用性能研究

建筑材料学报 2016年第4期19卷 672-677页

作者：孙培张洪亮郭桂宏牛冬瑜长安大学特殊地区公路工程教育部重点实验室陕西西安710064 长安大学材料科学与工程学院陕西西安710064

为评价纳米复合改性沥青混合料的路用性能,对纳米ZnO改性沥青混合料、纳米ZnO/TiO_2改性沥青混合料以及纳米ZnO/TiO_2/SBS复合改性沥青混合料进行了高温性能试验、小梁弯曲试验、劈裂试验及相关耐久性试验,并与基质沥青混合料和SBS改性... 详细信息

为评价纳米复合改性沥青混合料的路用性能,对纳米ZnO改性沥青混合料、纳米ZnO/TiO_2改性沥青混合料以及纳米ZnO/TiO_2/SBS复合改性沥青混合料进行了高温性能试验、小梁弯曲试验、劈裂试验及相关耐久性试验,并与基质沥青混合料和SBS改性沥青混合料进行对比分析.结果表明:上述3种纳米改性沥青混合料的高温稳定性、低温抗裂性、间接抗拉性和耐久性均优于基质沥青混合料,其中纳米ZnO/TiO_2/SBS复合改性沥青混合料的上述性能优于SBS改性沥青混合料.由此可见,纳米材料可显著改善沥青混合料的性能,纳米复合改性沥青的性能优于聚合物改性沥青,将其应用于道路是可行的.

关键词：道路工程纳米复合改性沥青 SBS改性沥青路用性能耐久性

在线全文

学校读者我要写书评

暂无评论

平尾防冰表面溢流冰生成规律试验研究

南京航空航天大学学报 2022年第6期54卷 1074-1082页

作者：裴如男朱东宇束珺中国航空工业空气动力研究院沈阳110034 沈阳市飞机结冰与防除冰重点实验室沈阳110034 高速高雷诺数气动力航空科技重点实验室沈阳110034 中国商飞上海飞机设计研究院上海201210

以带电加热防除冰系统的平尾后掠翼型为研究对象,在风速90 m/s、温度-4~-9℃、液态水含量(Liquid water content,LWC)0.45~1.5 g/m3以及水滴直径(Median volumetric diameter,MVD)20.1~36μm条件下,在0.6 m结冰风洞中开展溢流冰生成规... 详细信息

以带电加热防除冰系统的平尾后掠翼型为研究对象,在风速90 m/s、温度-4~-9℃、液态水含量(Liquid water content,LWC)0.45~1.5 g/m3以及水滴直径(Median volumetric diameter,MVD)20.1~36μm条件下,在0.6 m结冰风洞中开展溢流冰生成规律研究,包含溢流冰起始位置、覆盖范围和类型。试验结果表明,翼型表面溢流冰形成的起始位置受加热功率及来流温度影响较为明显,加热功率或来流温度低至一定数值时溢流冰类型从溪状冰变为冰脊,随着加热功率或来流温度的增加,溢流冰起始位置向后移动。溢流冰的溢流范围受LWC及加热功率影响较为明显,LWC越大,收集水量越多,溢流的范围随之越广;加热功率的影响类似,增大加热功率融化的溢流水增多,从而溢流范围越广。溢流冰生成的类型对MVD的变化比较敏感,当MVD从20.1μm增加为3μm时,溢流冰即从典型的溪状冰变为冰脊。

关键词：溢流冰防冰冰风洞冰脊

橡胶-纤维微表处混合料路用性能及降噪特性研究

在线全文

学校读者我要写书评

暂无评论

铁道科学与工程学报 2017年第8期14卷 1623-1631页

作者：李微韩森孙培牛冬瑜长安大学特殊地区公路工程教育部重点实验室陕西西安710064 长安大学材料科学与工程学院陕西西安710064

通过添加橡胶颗粒和纤维对微表处混合料进行复合改性以达到改善其性能的目的,为了系统研究混合料的路用性能,通过对混合料关键参数进行确定,围绕混合料耐磨耗性能、水稳定性能以及抗滑性能的主要影响因素进行研究,并结合自主研发的室内... 详细信息

通过添加橡胶颗粒和纤维对微表处混合料进行复合改性以达到改善其性能的目的,为了系统研究混合料的路用性能,通过对混合料关键参数进行确定,围绕混合料耐磨耗性能、水稳定性能以及抗滑性能的主要影响因素进行研究,并结合自主研发的室内轮胎加速下滑系统,对混合料的降噪性能进行试验分析。试验结果表明:当加入3%的橡胶颗粒及0.2%的聚酯纤维,最佳油石比为7.2%时,微表处混合料耐磨耗性能、水稳定性能均得到显著提高,抗滑性能也比普通沥青混合料得到明显的改善,同时,混合料的噪声水平也得到有效的降低,复合改性微表处混合料甚至比普通微表处混合料噪音值减小2.9 d B。

关键词：道路工程微表处橡胶颗粒聚酯纤维路用性能

在线全文

学校读者我要写书评

暂无评论

不同沥青基材料砂浆抗剪力学性能分析

材料导报 2016年第14期30卷 149-153页

作者：牛冬瑜漆祥韩森徐鸥明孙培长安大学材料科学与工程学院西安710064 长安大学交通铺面材料教育部工程研究中心西安710061 长安大学特殊地区公路工程教育部重点实验室西安710064

为了量化分析沥青混合料中不同沥青基材料砂浆抗剪力学性能的优劣,使其结果作为判断沥青砂浆影响混合料路用性能的依据,以剪切试验为基础,分析了常规条件与冻融条件下,橡胶沥青砂浆、70#沥青砂浆及其加入外掺剂砂浆的应力响应规律,提出... 详细信息

为了量化分析沥青混合料中不同沥青基材料砂浆抗剪力学性能的优劣,使其结果作为判断沥青砂浆影响混合料路用性能的依据,以剪切试验为基础,分析了常规条件与冻融条件下,橡胶沥青砂浆、70#沥青砂浆及其加入外掺剂砂浆的应力响应规律,提出了定量分析砂浆抗剪性能的指标,对4种砂浆的抗剪力学性能进行了对比分析。研究结果表明:常规条件下,70#沥青砂浆的黏聚强度c与内摩擦角φ分别为橡胶沥青砂浆的77%和76%,加入外掺剂橡胶沥青砂浆的黏聚强度c与内摩擦角φ分别为未加外掺剂橡胶沥青砂浆的1.41倍和1.29倍,由此可知,使用橡胶沥青与加入外掺剂,不仅能够提高砂浆的强度,而且可以改善砂浆的抗剪力学性能;冻融条件下,70#沥青砂浆的黏聚强度c与内摩擦角φ分别为橡胶沥青砂浆的64%和61%,加入外掺剂70#沥青砂浆的黏聚强度c与内摩擦角φ分别为未加外掺剂70#沥青砂浆的1.18倍和1.46倍,由此可知,使用橡胶沥青与加入外掺剂能够改善砂浆的水稳定性,减少冻融损伤,确保冻融后砂浆的抗剪切力学性能。

关键词：沥青砂浆剪切试验力学响应抗剪强度冻融条件

Detection of CD2 expression in chicken hematogenic embryo yolk sac lymphoid cells prior to thymus genesis

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2008年第12期18卷 1589-1594页

作者： dongyu Zhou~a Jigui Wang~b Weiquan Liu~b Rongxiu Liu~c Yuehu pei~a a College of Traditional Chinese Materia Medica,Shenyang Pharmaceutical University,Shenyang 110016,China b College of Biological Sciences,China Agricultural University,Beijing 100094,China c Liaoning Tianhe Biotechnology Co.Ltd,Room 1203,100-1 Dongbinhe Road,Shenyang District,Shenyang 110016,China [a]College of Traditional Chinese Materia Medica Shenyang Pharmaceutical University Shenyang 110016 China [b]College of Biological Sciences China Agricultural University Beijing 100094 China [c]Liaoning Tianhe Biotechnology Co. Ltd Room 1203 100-1 Dongbinhe Road Shenyang District Shenyang 110016 China

Lymphoid mononuclear cells from chick embryos at stage 16 were collected prior to fetal liver and thymus genesis to study the dif- ferentiation and function of the hematogenic yolk sac and to detect whether CD2 occurs on the surface of lymphoid mononuclear cells. The phenotype and functional activity of the cell surface protein E receptor and the ultrastructure of embryonic E~+ cells were compared with those of mature T *** results indicate 99.36% homology between the E receptors of embryonic lymphocytes and mature T *** similarities,including molecular distribution,motivation,the ability to form an erythrocyte rosette,the structure of the receptor-ligand complex,and the conformation of the signal channel,were detected between embryonic lymphocytes and mature CD2-expressing T *** results indicate that CD2 is already expressed prior to fetal liver and thymus genesis and that its expression is not dependent on the thymic microenvironment.

关键词： CD2 Chicken embryo Hematogenic yolk sac