检索结果-南通市图书馆

Enhanced photoluminescence from CdS nanocrystals encapsulated by PVP and SHMP

Optoelectronics Letters 2022年第5期18卷 257-262页

作者： vikas lahariya Saral Kumar Gupta Department of Physics Amity School of Applied SciencesAmity UniversityHaryana122413India Department of Physics Banasthali VidyapeethRajasthanIndia

The effects of the stabilizing agent on the structural and luminescence properties of cadmium sulfide(CdS)nanocrystals have been *** were prepared by chemical precipitation method using sodium hexametaphosphate(SHMP)and polyvinyl pyrrolidone(PVP).The structural and optical properties have been studied by X-ray diffraction(XRD),ultraviolet-visible(UV-Vis)absorption,photoluminescence(PL)and Fourier transform infrared(FTIR)*** patterns confirm the presence of cubic zinc blend crystal structure with space group *** results show the variation in crystallite size with change in *** shift in absorption edge as compared to bulk CdS is *** results represent broad and very intense red emission with smaller particle size due to modification of surface emitting states with surfactant.

关键词： spectroscopy surfactant absorption

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

Effect of surface crack on the bearing capacity of strip footing placed on rock mass

引用

Journal of Mountain Science 2025年第1期22卷 337-353页

作者： Avneet lahariya Debarghya CHAKRABORTY Department of Civil Engineering Indian Institute of Technology KharagpurWest Bengal 721302India

In hilly regions,the existence of surface cracks in rock mass induces a potential threat to structural ***,the present research aims to explore the impact of surface cracks on the loadbearing capacity of strip footing placed on the rock *** taking into account the various boundary constraints across the surface of crack edges,the study investigates the presence of two categories of surface cracks,namely(1)separated crack,and(2)fine *** lower bound limit analysis is employed in conjunction with the finite element method(LBFELA)to conduct the numerical *** order to evaluate rock mass yielding,the power conic programming(PCP)method is utilized to implement the generalized Hoek-Brown(GHB)failure *** stability of the strip footing is analyzed by determining the bearing capacity factor(Nσγ),which is presented in the form of design charts by varying the strength parameters of rock,including the Geological Strength Index(GSI),Hoek-Brown material parameter(mi),Disturbance factor(D),and Normalised Uniaxial Compressive Strength(σci/γB),whereγis the unit weight of rock mass,and B is the width of strip *** study also investigates the impact of cracks on strip footings,considering different positions of the crack(LC)and depths of the crack(DC).The results demonstrate that the influence of the fine crack is only noticeable until the LC/B ratio reaches ***,for the separated crack,its impact remains significant even when the LC/B ratio exceeds *** appearance of fine crack at the edge of the footing results in a decrease in the magnitude Nσγof up to 45%,indicating a substantial reduction in the stability of the *** failure patterns are presented and discussed in detail for various cases in this study to examine the effect of surface cracks on the strip footing and to address the extent of the plastic collapse.

关键词： Rock mass Surface cracks Strip footing Power cone programming GHB failure criterion Limit analysis

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

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

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：