检索结果-南通市图书馆

维普期刊数据库博看期刊

Cu(OH)_(2)/CMC one-dimensional composite-nanofiber-based electrochemical sensor for aspirin detection

在线全文

学校读者我要写书评

暂无评论

Nanotechnology and Precision Engineering 2023年第2期6卷 48-56页

作者： meng cui Xiaohui Wang Ziang Quan Bing Xu Di Gao Key Laboratory of Special Functional Materials in Colleges and Universities of Jilin Province Jilin Institute of Chemical TechnologyJilin 132022China Jilin Electric Power Plant National Energy GroupJilin 132022China

Copper-based nanomaterials have been widely used in catalysis,electrodes,and other applications due to their unique electron-transfer *** this work,an efficient electrochemical sensor based on an electrode modified with one-dimensional Cu(OH)_(2)/carboxymethyl cellulose(CMC)composite nanofibers was fabricated and investigated for the detection of *** electron microscopy was employed to examine the morphological characteristics of these composite *** voltammetry and electrochemical impedance spectroscopy were used to assess the electrochemical performance of a Cu(OH)_(2)/CMC composite nanofiber-modified *** findings indicate that the modified electrode has a very high sensitivity to *** observed enhanced performance could be a result of the high surface-to-volume ratio of the composite nanofibers and their superior electron-transport characteristics,which may hasten electron transfer between aspirin and the surfaces of the modified *** detection technique also demonstrated strong selectivity for *** findings imply that the technique can be applied as a highly effective and selective approach to aspirin measurement in biological science.

关键词： Sodium carboxymethyl cellulose Cu(OH)_(2)nanofiber Electrochemical sensor Aspirin

在线全文

学校读者我要写书评

暂无评论

大运河安徽段文物遗产空间可视化分析

蚌埠学院学报 2024年第5期13卷 83-89页

作者：白如山崔梦晴陈玲玲倪梦影夏宇阜阳师范大学历史文化与旅游学院安徽阜阳236037

运用GIS空间分析工具对大运河安徽段文物遗产进行可视化分析,结果发现:从空间维度看,大运河安徽段文物遗产具有明显的集聚特征,濉溪县与埇桥区交界处为核心集聚区。从时间维度看,大运河安徽段文物遗产演化特征因时各异。文物遗产分布重... 详细信息

运用GIS空间分析工具对大运河安徽段文物遗产进行可视化分析,结果发现:从空间维度看,大运河安徽段文物遗产具有明显的集聚特征,濉溪县与埇桥区交界处为核心集聚区。从时间维度看,大运河安徽段文物遗产演化特征因时各异。文物遗产分布重心总体上由东南向西北呈Z字形演化态势,演化格局经历了“多核-单核-双核-多点”的空间过程。从类型维度看,大运河安徽段文物遗产空间分布形态因类各异,古遗址、古墓葬和古建筑三类文物遗产呈集聚分布,而近现代类文物遗产的分布较为分散。据此提出有待做好“规划”,做特“研学”和做精“智慧”。

关键词：文物遗产空间格局安徽大运河可视化分析

Synergistic effects of total ionizing dose and radiated electromagnetic interference on analog-to-digital converter

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2022年第3期33卷 172-180页

作者： Ping Wu Lin Wen Zhi-Qian Xu Yun-Sheng Jiang Qi Guo cui meng Department of Engineering Physics Tsinghua UniversityBeijing 100084China Laboratory of Particle and Radiation Imaging Ministry of EducationBeijing 100084China Xinjiang Technical Institute of Physics and Chemistry Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Functional Materials and Devices for Special Environments Urumqi 830011China

The influence of combined total ionization dose(TID)and radiated electromagnetic interference(EMI)in a commercial analog-to-digital converter(ADC)was *** degradation of the direct-current response,the static parameters,and the dynamic parameters caused by the TID and EMI separately and synergistically is *** experimental results demonstrate that the increase in TID intensifies data error and the signal-tonoise ratio(SNR)degradation caused by radiated *** cumulative distribution function of EMI failure with respect to data error and SNR with different TIDs was *** decreasing trend of the threshold was acquired with a small sample size of five for each TID *** result indicates that the ADC is more sensitive in a compound radiation environment.

关键词： Integrated circuit Total ionizing dose Electromagnetic radiation Synergistic effect Combined environment

在线全文

学校读者我要写书评

暂无评论

空间网格结构挠度检测方法

重庆建筑 2024年第4期23卷 58-60页

作者：张树勋李后军崔萌王宁国家网架及钢结构产品质量检验检测中心江苏徐州221000 江苏贝思特建设科技有限公司江苏徐州221000

挠度是空间网格结构的重要检测项目,但相关标准对于挠度检测方法的规定不够明确。该文结合工程实例对挠度检测方法中存在的问题进行了探讨,并利用结构分析软件来实现节点基准标高的计算,可为准确检测挠度提供参考。

关键词：空间网格结构网架挠度检测

A novel approach for synthesis of 3-amino-5-aryl-2,5-dihydropyridazines using onium salt as soluble support

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

Chinese Chemical Letters 2011年第7期22卷 823-826页

作者： meng Gao cui Fen Lu Gui Chun Yang Zu Xing Chen Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecule & School of Chemistry and Chemical Engineering Hubei University Wuhan 430062 China

In this work it was presented an application of task specific onium salt as soluble support for the synthesis of 3-amino-5-aryl-2,5- dihydropyridazines. This soluble support is of wide applicability and combines advantages of solid phase synthesis without its limitations with those of solution phase chemistry. After a simple washing step, products were cleaved from the supports and obtained in good yields.

关键词： Onium salt Support Synthesis Pyridazines

Synthesis and mesomorphic properties of novel tolane-type liquid crystals

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第11期20卷 1283-1286页

作者： Dong Yu Zhao Qing Yong meng Xiao Peng cui Huai Yang Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Two series of novel tolane-type liquid crystals （LCs） comprising of hydrogen-bonded organic acids were synthesized. The formation of dimerized H-bond LCs was confirmed by IR spectroscopy, and mesomorphic properties of the LCs were investigated by differential scanning calorimetry （DSC） and polarizing optical microscopy （POM）. It was found that the end groups of the liquid crystals as well as the unsaturated rigid core had effect on the mesomorphic properties.

关键词： Tolane Hydrogen-bonded liquid crystal Mesomorphic properties Synthesis

Simulation of electromagnetic pulses generated by escaped electrons in a high-power laser chamber

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2018年第11期20卷 45-52页

作者： Hanbing JIN cui meng Yunsheng JIANG Ping WU Zhiqian XU Department of Engineering Physics Tsinghua UniversityBeijing 100084People＇s Republic of China Key Laboratory of Particle ＆Radiation Imaging Ministry of EducationBeijing 100084People＇s Republic of China

Intensive electromagnetic pulses （EMPs） can be generated when a high-power laser strikes a target. The transient electromagnetic field can have an intensity of up to several hundred kV m- 1 with a broad frequency of up to several gigahertz, which may affect diagnostics and interfere with, or even damage, electronic equipment. In this paper, the process in which hot electrons produced by the laser-target interaction radiate EMPs is studied and simulated. The physical process is divided into three stages which are： the production of hot electrons; the escape of hot electrons; and the generation of EMPs. Instead of using a general finite difference time domain （FDTD） method to solve the Maxwell equations, a particle-in-cell method together with a time- biased FDTD method is applied in EMP simulation to restrain high-frequency noise. The results show that EMPs are stronger with higher laser intensity and larger target size.

关键词： laser plasma particle-in-cell electromagnetic pulse

Improved ecological development model for lower Yellow River floodplain,China

在线全文

学校读者我要写书评

暂无评论

Water Science and Engineering 2020年第4期13卷 275-285页

作者： Jin-liang Zhang Yi-zi Shang Ji-xiang Liu Jian Fu meng cui Yellow River Engineering Consulting Co. Ltd.Zhengzhou 450003China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basins China Institute of Water Resources and Hydropower ResearchBeijing 100038China

In this study,a model for the development of the wide floodplain in the lower Yellow River Basin,in China was *** model includes flood control schemes using grading criteria,enables sediment deposition in partitioned zones,and allows free exchange between channel runoff and *** wide floodplain located between the main channel and levees is divided into three typical regions:the tender,low,and high *** ecological models should be applied when these floodplains are *** paper describes the associated research ideas and methodology,and clarifies several key issues,including sediment prediction and regulation,land planning,land use,and a multi-dimensional framework of safeguard measures for industries on the lower Yellow River floodplain.A refined ecological development model is proposed for the lower Yellow River floodplain,and future work on ecological and sustainable development of the lower floodplain is *** establish a comprehensive system integrating runoff and sediment resource regulation in the Yellow River Basin,future work should focus on runoff and sediment exchange mechanisms in the wandering lower ***,it is necessary to improve theories on floodplain planning and ecological construction,and these theories should be integrated with the research findings on land development across the lower Yellow River floodplain.©2020 Hohai *** and hosting by Elsevier *** is an open access article under the CC BY-NC-ND license(http://***/licenses/by-nc-nd/4.0/).

关键词： Ecological development Lower Yellow River Floodplain Sediment Eco-friendly construction model

基于实船冰区加速度监测的破冰颠震识别与分析

在线全文

学校读者我要写书评

暂无评论

船舶 2024年第1期35卷 84-95页

作者：马群李放崔濛高处周利丁仕风江苏科技大学船舶与海洋工程学院镇江212003 上海交通大学船舶海洋与建筑工程学院上海200240 中国船舶及海洋工程设计研究院上海200011

船舶在冰区航行时,在海冰的碰撞作用下,船体会产生结构和振动响应,响应的幅度与海冰冰况、船舶航速、结构刚度、测量位置等因素具有很大的相关性。不同于局部结构振动,船体发生的全局性垂向运动和振动响应可统称为颠震,对于船载设备的... 详细信息

船舶在冰区航行时,在海冰的碰撞作用下,船体会产生结构和振动响应,响应的幅度与海冰冰况、船舶航速、结构刚度、测量位置等因素具有很大的相关性。不同于局部结构振动,船体发生的全局性垂向运动和振动响应可统称为颠震,对于船载设备的功能具有较大影响,容易导致紧固件松动等各类问题。该文基于“雪龙2”号所搭载分布式加速度计在南极冰区航行中测得的数据开展了破冰颠震研究,根据时频分析结果,利用神经网络方法识别破冰颠震事件;通过频谱分析分离颠震信号,从而提取破冰颠震的加速度幅值、脉宽、发生频率等关键参数,形成破冰颠震识别与分析方法。在此基础上,分析典型场景下的破冰颠震数据,研究海冰环境、船舶航速、测量位置等因素对于船舶颠震各关键参数的影响,进而总结不同海冰环境下对船载设备承受颠震的能力要求,为极地船舶设备选型提供参考。

关键词：冰区航行加速度测量破冰颠震时频分析神经网络