检索结果-南通市图书馆

Review-material degradation assessed by digital image processing:Fundamentals,progresses,and challenges

Journal of materials Science & Technology 2020年第18期52卷 146-162页

作者： Da-Hai Xia Shizhe Song Lei Tao Zhenbo Qin Zhong Wu Zhiming Gao Jihui Wang Wenbin Hu Yashar Behnamian Jing-Li Luo Tianjin Key Laboratory of Composite and Functional materials Tianjin 300354China School of materials Science and Engineering Tianjin UniversityTianjin 300354China CNOOC Tianjin Chemical Research&Design Institute Co.Ltd Tianjin 300131China Department of Chemical and materials Engineering University of AlbertaEdmontonAlbertaT6G 1H9Canada

material degradation is accompanied by the changes in surface structure,morphology,and *** changes can be recorded by a variety of image acquisition devices that export digital images in grayscale or true color to a *** regarding corrosion type and extent can be extracted with image processing *** paper provides a comprehensive review of material degradation assessed by digital image *** image processing systems used to assess material degradation are briefly reviewed,and the algorithms developed to process metallic materials degradation images are *** and electrochemical methods that can be used to support digital image processing results are summarized,and future work that will augment the present methods of evaluating material degradation are discussed.

关键词： Image processing material degradation Corrosion Pitting Fuzzy K-S entropy

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

Investigation on electrocatalytic performance and material degradation of an N-doped grapheneMOF nanocatalyst in emulated electrochemical environments

Industrial Chemistry & Materials

引用

Industrial Chemistry & materials 2023年第3期1卷 360-375页

作者： Niladri Talukder Yudong Wang Bharath Babu Nunna Xiao Tong Jorge Anibal Boscoboinik Eon Soo Lee Advanced Energy Systems and Microdevices Laboratory Department of Mechanical and Industrial EngineeringNew Jersey Institute of TechnologyNewarkNJ07102USA Department of Mechanical Engineering Weber State UniversityOgdenUtah84408USA The Center for Functional Nanomaterials Brookhaven National LaboratoryUptonNew York 11973USA

To develop graphene-based nanomaterials as reliable catalysts for electrochemical energy conversion and storage systems(*** fuel cells,metal–air batteries,etc.),it is imperative to critically understand their performance changes and correlated material degradation processes under different operational *** these systems,hydrogen peroxide(H_(2)O_(2))is often an inevitable byproduct of the catalytic oxygen reduction reaction,which can be detrimental to the catalysts,electrodes,and electrolyte ***,we studied how the electrocatalytic performance changes for a heterogeneous nanocatalyst named nitrogen-doped graphene integrated with a metal–organic framework(N-G/MOF)by the effect of H_(2)O_(2),and correlated the degradation process of the catalyst in terms of the changes in elemental compositions,chemical bonds,crystal structures,and *** catalyst samples were treated with five different concentrations of H_(2)O_(2) to emulate the operational conditions and examined to quantify the changes in electrocatalytic performances in an alkaline medium,elemental composition and chemical bonds,crystal structure,and *** electrocatalytic performance considerably declined as the H_(2)O_(2) concentration reached above 0.1 *** XPS analyses suggest the formation of different oxygen functional groups on the material surface,the breakdown of the material's C–C bonds,and a sharp decline in pyridinic-N functional groups due to gradually harsher H_(2)O_(2) *** higher concentrations,the H_(2)O_(2)-derived radicals altered the crystalline and morphological features of the catalyst.

关键词： Nitrogen-doped graphene-based electrocatalyst Metal-organic framework Hydrogen peroxide effect on catalyst Electrocatalytic performance material degradation

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

A SIGNAL PROCESSING METHOD OF DETECTING AND LOCATING material degradation OR MICRO-CRACKS USING ULTRASONIC GUIDED WAVES

A SIGNAL PROCESSING METHOD OF DETECTING AND LOCATING MATERIA...

引用

第三届全国压电和声波理论及器件技术研讨会

作者： Bing WANG,Hong XU Key Laboratory of Condition Monitoring and Control for Power Plant Equipment(North China Electric Power University), Ministry of Education,Beijing 102206,China

The detection of micro-cracks or degradation of strength of materials at the early stage of fracture is of increasing importance in power plants and aviation industry.A methodology of detecting micro-cracks or degradation of material using quasi matrix pencil method is presented in this *** damage,is represented by small local elastic modulus *** of axisymmetric longitudinal guided waves to the presence of modulus reduction is studied using the Finite Element Method(FEM).Only the axisymmetric damage is considered *** using this method to calculate the dispersion relation of excited wave mode,the small modulus reduction can be *** the velocitY of excited guided wave and the time point at which the calculated dispersion curve changing,the damage can be *** this method can be used to find micro-cracks or material degradation at the early stage of fracture.

关键词： Guided waves micro-crack material degradation elastic modulus reduction quasi matrix pencil method

来源： cnki会议评论

在线全文

cnki会议

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

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

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：