期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到5篇文章
< 1 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
A Two-step Inverse Method for Quantitative Damage Evaluation of Plate-like Structures Using Vibration Approach 认领 引用
1
作者 Shuai He Jiaxin Li +2 位作者 Xuejing Wu Chunhui Wang Tianran Lin 《Journal of Dynamics, Monitoring and Diagnostics》 2024年第1期32-39,共8页
This study presents a novel two-step approach to assess plate-like structural laminar damages,particularly for delamination damage detection of composite structures.Firstly,a 2-D continuous wavelet transform is employ... This study presents a novel two-step approach to assess plate-like structural laminar damages,particularly for delamination damage detection of composite structures.Firstly,a 2-D continuous wavelet transform is employed to identify the damage location and sizes from vibration curvature data.An inverse method is subsequently then used to determine the bending stiffness reduction ratio along a specified direction,enabling the quantification of the delamination severity.The method employed in this study is an extension of the one-dimensional inverse method developed in a previous work of the authors.The applicability of the two-step inverse approach is demonstrated in a simulation analysis and by an experimental study on a cantilever composite plate containing a single delamination.The inverse method is shown to have the capacity to reveal the detailed damage information of delamination within a constrained searching space and can be used to determine the effective flexural stiffness of composite plate structures,even in cases of complex delamination damage. 展开更多
关键词 2-D continuous wavelet transform damage quantification delamination damage inverse method vibration
暂未订购 下载PDF
Information encryption with a high information-carrying capacity based on a stimulus-responsive hydrogen-bonded organic framework and a smartphone 认领 引用 被引量：1
2
作者 Tianran Lin Chunsuo Tian +4 位作者 Ying Sun Shendong Liu Di Wang Li Hou Shulin Zhao 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第5期393-396,共4页
Information-carrying capacity has become an important factor in the development of encryption and anti-counterfeiting.Herein,a hydrogen-bonded organic framework(HOF-PyTTA)was developed as novel anti-counterfeiting ink... Information-carrying capacity has become an important factor in the development of encryption and anti-counterfeiting.Herein,a hydrogen-bonded organic framework(HOF-PyTTA)was developed as novel anti-counterfeiting ink without rare metals and a smartphone-based APP was written for encryption and anti-counterfeiting.We found that the fluorescence of HOF-PyTTA can be quenched by Fe3+ions and recovered by the addition of ascorbic acid.And the fluorescence of HOF-PyTTA can be enhanced by the increasing concentrations of ethanol.Based on these stimulus-response properties,four anti-counterfeiting models with gradually increased security were studied.Mode one was printed by HOFs ink and decrypted by UV light.Mode two was based on HOF-PyTTA and CsPbBr3inks(or HOF-PyTTA-Fe3+)which are used to separately print the genuine and pirated information.A decryption reagent was applied to get the genuine information.Furthermore,we successfully construct a dynamic information encryption anti-counterfeiting model using a fluorescence array in combination with an information encryption anticounterfeiting APP.The circular array is printed by several concentrations of HOF-PyTTA ink and different RGB thresholds are set with the help of the information encryption anti-counterfeiting APP,to obtain distinct encrypted anti-counterfeiting information,thus accomplishing a high information-carrying capacity. 展开更多
关键词 Hydrogen-bonded organic framework Fluorescence array Smartphone Anti-counterfeiting Message encryption
暂未订购 下载PDF
An Improved Second-Order Multisynchrosqueezing Transform for the Analysis of Nonstationary Signals 认领 引用 被引量：2
3
作者 Kewen Wang Yajun Shang +1 位作者 Yongzheng Lu Tianran Lin 《Journal of Dynamics, Monitoring and Diagnostics》 2023年第3期183-189,共7页
Second-order multisynchrosqueezing transform(SMSST),an effective tool for the analysis of nonstationary signals,can significantly improve the time-frequency resolution of a nonstationary signal.Though the noise energy... Second-order multisynchrosqueezing transform(SMSST),an effective tool for the analysis of nonstationary signals,can significantly improve the time-frequency resolution of a nonstationary signal.Though the noise energy in the signal can also be enhanced in the transform which can largely affect the characteristic frequency component identification for an accurate fault diagnostic.An improved algorithm termed as an improved second-order multisynchrosqueezing transform(ISMSST)is then proposed in this study to alleviate the problem of noise interference in the analysis of nonstationary signals.In the study,the time-frequency(TF)distribution of a nonstationary signal is calculated first using SMSST,and then aδfunction is constructed based on a newly proposed time-frequency operator(TFO)which is then substituted back into SMSST to produce a noisefree time frequency result.The effectiveness of the technique is validated by comparing the TF results obtained using the proposed algorithm and those using other TFA techniques in the analysis of a simulated signal and an experimental data.The result shows that the current technique can render the most accurate TFA result within the TFA techniques employed in this study. 展开更多
关键词 fault diagnosis nonstationary signals synchrosqueezing transform time-frequency operator
暂未订购 下载PDF
“三位一体”助力分析化学相关实验类课程的改革 认领 引用 被引量：5
4
作者 林天然 侯丽 +6 位作者 董家新 叶芳贵 田建袅 张亮亮 赵书林 邱建华 沈星灿 《大学化学》 CAS 2022年第7期17-20,共4页
科学技术进步与社会需求变化对大学的实验教学提出了更高要求。为了迎接新形势下的需求与挑战,广西师范大学化学与药学学院从实验的教学内容、教学方法与教学效果评价等方面对分析化学实验、药物分析实验以及综合化学实验的教学工作提... 科学技术进步与社会需求变化对大学的实验教学提出了更高要求。为了迎接新形势下的需求与挑战,广西师范大学化学与药学学院从实验的教学内容、教学方法与教学效果评价等方面对分析化学实验、药物分析实验以及综合化学实验的教学工作提出改革,提高学生的创新能力与实验动手能力,促进了培养具有良好科学素养的卓越人才。 展开更多
关键词 实验教学 分析化学实验 药物分析实验 综合化学实验
暂未订购 下载PDF
一种基于智能手机可视化多色荧光检测碱性磷酸酶活性的方法——推荐一个本科生科研训练项目 认领 引用 被引量：3
5
作者 秦雨欣 林天然 +2 位作者 李金莹 覃思媛 侯丽 《大学化学》 CAS 2020年第6期110-116,共7页
介绍一个本科生科研训练项目。本项目合成了具有荧光性能的铜金属有机框架材料,并用于构建一种基于智能手机可视化多色荧光检测碱性磷酸酶活性的方法。该方法可应用于血清中碱性磷酸酶含量的可视化检测。本科生在该科研项目训练中得到... 介绍一个本科生科研训练项目。本项目合成了具有荧光性能的铜金属有机框架材料,并用于构建一种基于智能手机可视化多色荧光检测碱性磷酸酶活性的方法。该方法可应用于血清中碱性磷酸酶含量的可视化检测。本科生在该科研项目训练中得到了充分的锻炼。本文详细介绍了本科生在该项目选题、实验方案设计、实验过程、取得的成果以及经验收获等。 展开更多
关键词 科研训练计划 碱性磷酸酶 多色荧光传感器 可视化检测 手机应用程序
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈