检索结果-南通市图书馆

Singular value diagnosis in dam safety monitoring effect values

Science China(Technological Sciences) 2011年第5期54卷 1169-1176页

作者： GU ChongShi ZHAO ErFeng JIN Yi SU HuaiZhi State Key Laboratory of Hydrology Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098China National Engineering Research Center of Water Resources Efficient Utilization and Engineering safety Hohai UniversityNanjing 210098China College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing 210098China

Based on the principal component analysis, principal components that have major influence on data variance are determined by the energy percentage method according to the correlation between monitoring effects. Then principal components are extracted through reconstructing multi effects. Moreover, combining with the optimal estimation theory, the method of singular value diagnosis in dam safety monitoring effect values is proposed. After dam monitoring information matrix is obtained, single effect state estimation matrix and multi effect fusion estimation matrix are constructed to make diagnosis on singular values to reduce false alarm rate. And the diagnosis index is calculated by PCA. These methods have already been applied to an actual project and the result shows the ability of the monitoring effect reflecting dam evolution behavior is improved as dam safety monitoring effect fusion estimation can take accurate identification on singular values and achieve data reduction, filter out noise and lower false alarm rate effectively.

关键词： dam safety monitoring effect singular value diagnosis principal component analysis optimal estimation

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

Long-term dam safety monitoring of Punt dal Gall arch dam in Switzerland

引用

Frontiers of Structural and Civil Engineering 2012年第1期6卷 76-83页

作者： M.WIELAND G.F.KIRCHEN Poyry Energy Ltd. Hardturmstrasse 161Zurich CH-8037Switzerland Engadiner Kraftwerke AG Zernez CH-7530Switzerland

The 130m high Punt dal Gall dam is located at the Swiss-Italian border in the South-eastern part of Switzerland and was completed in *** dam is founded on highly folded and partially crushed dolomite and limestone formations.A grout curtain with an area of 120,000m^(2) was provided for controlling *** the monitoring of the dam deformations five inverted pendulums were installed in the dam and three in the rock foundation of the right abutment outside of the *** a seasonal water level fluctuation in the reservoir of about 60 m the maximum amplitude of the radial displacement is 25 mm,which includes both the effects of the water load and temperature *** a comprehensive geodetic network was established,57 joint meters were installed and cracks in the crest gallery are monitored by crack *** are also thermometers,piczometers and *** at the left and fight banks of the dam are monitored and chemical analyses of the seepage water and springs are performed *** dam is equipped with strong motion instruments and several near-field earthquakes have been recorded in the *** paper describes the long-term safety monitoring of this 42 years old arch dam.A short description of the Swiss practice in dam safety monitoring and emergency planning is also given.

关键词： dam safety concept arch dam dam instrumentation dam safety monitoring

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

Application of Wireless Sensor Network in dam safety monitoring System Design

Application of Wireless Sensor Network in Dam Safety Monitor...

引用

International Conference on Broadcast Technology and Multimedia Communication(BTMC 2010)

作者： Yuhong Li and Xinhuan Cheng Digital Engineering and Simulation Centre College of Hydropower and Information Engineering Huazhong University of Science and Technology Wuhan 430074 P.R.China

As the potential for loss of life in the event of a dam failure is very dependent on the warning time available to evacuate the population at risk downstream of the dam,it has important implications for the monitoring of dam *** efforts have been carried out over the decades to produce methods for monitoring and determination of the extent and timing of the dam *** this paper,a novelty design of a WSN-based dam safety monitoring system is *** for energy saving of WSN-based dam safety monitoring are given:reasonable nodes of instruments settlement,and feasible routing strategy.

关键词： WSN dam safety monitoring Routing Strategy System Design.

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

Design and Implementation of dam safety monitoring and Management System

Design and Implementation of Dam Safety Monitoring and Manag...

引用

2012 International Conference on Engineering Materials (ICEM 2012)

作者： Liu Minghui Changchun University of computer science and technology

The dam safety monitoring is the key factor to evaluate the operating status of the dam and ensure its normal operation. To improve the efficiency and accuracy of dam safety monitoring, it is necessary to develop a set of practical security software for monitoring and management. This paper discusses the practical significance of dam safety supervisory managerial system, the existing problems as well as the related solutions. Meanwhile, this paper also comes up with the design and implementation program against this background, which achieves the dam safety monitoring data’s efficient acquisition, data accuracy and rapid data query, as well as the graphical features of data analysis results.

关键词： dam safety monitoring Information management system

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

Genetic Regression Model for dam safety monitoring

引用

Transactions of Tianjin University 2002年第3期8卷 196-199页

作者：马震岳陈维江董毓新大连理工大学土木建筑工程学院大连116023 中国水利水电科学研究院北京100038

Under-fitting problems usually occur in regression models for dam safety *** overcome the local convergence of the regression, a genetic algorithm (GA) was proposed using a real parameter coding, a ranking selection operator, an arithmetical crossover operator and a uniform mutation operator, and calculated the least-square error of the observed and computed values as its fitness function. The elitist strategy was used to improve the speed of the convergence. After that, the modified genetic algorithm was applied to reassess the coefficients of the regression model and a genetic regression model was set up. As an example, a slotted gravity dam in the Northeast of China was introduced. The computational results show that the genetic regression model can solve the under-fitting problems perfectly.

关键词： dam safety monitoring under-fitting genetic regression model

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

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

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：