检索结果-南通市图书馆

Machine learning-based seismic assessment of framed structures with soil-structure interaction

Frontiers of Structural and Civil Engineering 2023年第2期17卷 205-223页

作者： mohamed noureldin Tabish ALI Jinkoo KIM Department of Global Smart City Sungkyunkwan UniversitySuwon 16419Korea

The objective of the current study is to propose an expert system framework based on a supervised machine learning technique(MLT)to predict the seismic performance of low-to mid-rise frame structures considering soil-structure interaction(SSI).The methodology of the framework is based on examining different MLTs to obtain the highest possible accuracy for *** the MLT,a sensitivity analysis was conducted on the main SSI parameters to select the most effective input *** limit state criteria were used for the seismic evaluation within the process.A new global seismic assessment ratio was introduced that considers both serviceability and strength aspects by utilizing three different engineering demand parameters(EDPs).The proposed framework is novel because it enables the designer to seismically assess the structure,while simultaneously considering different EDPs and multiple limit ***,the framework provides recommendations for building component design based on the newly introduced global seismic assessment ratio,which considers different levels of seismic *** proposed framework was validated through comparison using non-linear time history(NLTH)*** results show that the proposed framework provides more accurate results than conventional ***,the generalization potential of the proposed framework was tested by investigating two different types of structural irregularities,namely,stiffness and mass *** results from the framework were in good agreement with the NLTH analysis results for the selected case studies,and peak ground acceleration(PGA)was found to be the most influential input parameter in the assessment process for the case study models *** proposed framework shows high generalization potential for low-to mid-rise structures.

关键词： seismic hazard artificial neural network soil-structure interaction seismic 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

Does the presence of a percutaneous renal access influence fluoroscopy time during percutaneous nephrolithotomy?

引用

Asian Journal of Urology 2015年第4期2卷 220-223页

作者： Yasser A.noureldin mohamed A.Elkoushy Sero Andonian Division of Urology McGill University Health CentreMontrealQuebecCanada Department of Urology Benha University HospitalBenha UniversityBenhaEgypt Department of Urology Suez Canal UniversityIsmailiaEgypt

Objective:The aim of this study was to assess whether the presence of a preformed percutaneous renal access(PCA)had any effects on fluoroscopy time(FT)during percutaneous nephrolithotomy(PCNL).Methods:After ethics approval was obtained,medical records of all patients who underwent PCNL between 2009 and 2013 at a tertiary stone referral centre were retrospectively *** with and without pre-formed PCA undergoing PCNL were *** who underwent second-look PCNL and those who had their access inserted by interventional radiology constituted the group with pre-formed ***:A total of 185 PCNLs were *** mean patient age was 55.2±1.0 years with mean body mass index(BMI)of 27.8±0.5 kg/m^2 and male gender of 63.8%.The mean stone size was 618.4±47.0 mm^2 with mean Guy’s grade of 2.3±0.7 and mean *** of 7.6±*** mean operative time was 98.7±2.6 min with mean FT of 113.4±4.5 *** overall stone-free rate was 71.9%with complication rate of 16.2%.When compared with PCNLs without pre-formed PCA,PCNLs with pre-formed PCA were associated with significantly shorter FT(120.6±5.1 vs.77.5±6.7 s;p<0.001)and significantly lower estimated blood loss(EBL)(p=0.01).On multivariate analysis,PCNLs with pre-formed PCA were associated with significantly shorter FT(***=-43.2(95%CI:-66.4 to-20);p<0.001)and lower EBL(p=0.02).Conclusion:PCNLs with pre-formed PCA were associated with significantly lower FT and EBL when compared with PCNLs without pre-formed PCA.

关键词： Fluoroscopy Percutaneous nephrolithotomy Renal access

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

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：