为了使网站建设更加的经济,更加节省时间与金钱,并且使浏览者在最短的时间内获得最佳的浏览效果。WEB标准开始了进化:W3C(World Wide Web Consortium)先后发布了CSS2,XHTML1.0,XML1.0等,最后形成了一套较为完善的新的WEB设计标准,XHTML+...为了使网站建设更加的经济,更加节省时间与金钱,并且使浏览者在最短的时间内获得最佳的浏览效果。WEB标准开始了进化:W3C(World Wide Web Consortium)先后发布了CSS2,XHTML1.0,XML1.0等,最后形成了一套较为完善的新的WEB设计标准,XHTML+CSS。展开更多
This document describes the creation of an informative Web GIS aimed at mitigating the impacts of flooding in the municipality of Ouagadougou, in Burkina Faso, a region that is highly sensitive to climate change. Burk...This document describes the creation of an informative Web GIS aimed at mitigating the impacts of flooding in the municipality of Ouagadougou, in Burkina Faso, a region that is highly sensitive to climate change. Burkina Faso, which is undergoing rapid urbanization, faces major natural threats, particularly flooding, as demonstrated by the severe floods of 2009 that caused loss of life, injury, structural damage and economic losses in Ouagadougou. The aim of this research is to develop a web map highlighting the municipality’s flood-prone areas, with a view to informing and raising awareness of flood risk reduction. Using the Leaflet JavaScript mapping library, the study uses HTML, CSS and JavaScript to implement web mapping technology. Data on Ouagadougou’s flood zones is generated by a multi-criteria analysis combining Saaty’s AHP method and GIS in QGIS, integrating seven (7) parameters including hydrography, altitude, slope, rainfall, soil types, land use and soil moisture index. QGIS processes and maps the themes, PostgreSQL with PostGIS serves as the DBMS and GeoServer functions as the map server. The Web GIS platform allows users to visualize the different flood risks, from very low to very high, or the high-risk areas specific to Ouagadougou. The AHP calculations classify the municipality into five flood vulnerability zones: very low (24.48%), low (27.93%), medium (23.01%), high (17.11%) and very high (7.47%). Effective risk management requires communication and awareness-raising. This online mapping application serves as a tool for communication, management and flood prevention in Ouagadougou, helping to mitigate flood-related natural disasters.展开更多
XHTML最早口q做"HTML in XML",是一种基于XML的超文本标记语言,也就是说,将以前用SGML定义的HTML改为用XML重新定义。从这个意义上讲,XHTML实际上是XMU的一种应用。表面上看,在XHTML中,其标记仍旧延用以往的HTML的标记,各元...XHTML最早口q做"HTML in XML",是一种基于XML的超文本标记语言,也就是说,将以前用SGML定义的HTML改为用XML重新定义。从这个意义上讲,XHTML实际上是XMU的一种应用。表面上看,在XHTML中,其标记仍旧延用以往的HTML的标记,各元素和属性的名称和用法也几乎不变。展开更多
随着城市的不断发展,地市级测绘部门在多年的外业测量过程中积累了大量的像控点数据。由于早期像控点数据以文件方式管理,点之记录入时未统一标准,因此需要借助信息化手段来实现像控点精细管理。本文针对像控点管理工作,基于ArcGIS Web ...随着城市的不断发展,地市级测绘部门在多年的外业测量过程中积累了大量的像控点数据。由于早期像控点数据以文件方式管理,点之记录入时未统一标准,因此需要借助信息化手段来实现像控点精细管理。本文针对像控点管理工作,基于ArcGIS Web AppBuilder框架,以ArcGIS Enterprise为后台,采用ArcGIS API for JavaScript开发平台,结合HTML5+JavaScript+CSS3的主流前端技术,设计出一个用户交互界面良好、操作简单的哈尔滨市主城区像控点管理应用系统,实现了像控点一张图管理,完成像控点整理、查询、编辑修正、资料导出等管理功能,为工作人员提供极大的便利。展开更多
JavaScript has become one of the most widely used languages for Web development.Its dynamic and event-driven features make it challenging to ensure the correctness of Web applications written in JavaScript.A variety o...JavaScript has become one of the most widely used languages for Web development.Its dynamic and event-driven features make it challenging to ensure the correctness of Web applications written in JavaScript.A variety of dynamic analysis techniques have been proposed which are,however,limited in either coverage or scalability.In this paper,we propose a simple,yet effective,model-based automated testing approach to achieve a high code-coverage within the time budget via testing with longer event sequences.We implement our approach as an open-source tool LJS,and perform extensive experiments on 21 publicly available benchmarks.On average,LJS is able to achieve 86.5%line coverage in 10 minutes.Compared with JSDEP,a state-of-the-art breadth-first search based automated testing tool enriched with partial order reduction,the coverage of LJS is 11%-19%higher than that of JSDEP on real-world large Web applications.Our empirical findings support that proper longer test sequences can achieve a higher code coverage in JavaScript Web application testing.展开更多
文摘This document describes the creation of an informative Web GIS aimed at mitigating the impacts of flooding in the municipality of Ouagadougou, in Burkina Faso, a region that is highly sensitive to climate change. Burkina Faso, which is undergoing rapid urbanization, faces major natural threats, particularly flooding, as demonstrated by the severe floods of 2009 that caused loss of life, injury, structural damage and economic losses in Ouagadougou. The aim of this research is to develop a web map highlighting the municipality’s flood-prone areas, with a view to informing and raising awareness of flood risk reduction. Using the Leaflet JavaScript mapping library, the study uses HTML, CSS and JavaScript to implement web mapping technology. Data on Ouagadougou’s flood zones is generated by a multi-criteria analysis combining Saaty’s AHP method and GIS in QGIS, integrating seven (7) parameters including hydrography, altitude, slope, rainfall, soil types, land use and soil moisture index. QGIS processes and maps the themes, PostgreSQL with PostGIS serves as the DBMS and GeoServer functions as the map server. The Web GIS platform allows users to visualize the different flood risks, from very low to very high, or the high-risk areas specific to Ouagadougou. The AHP calculations classify the municipality into five flood vulnerability zones: very low (24.48%), low (27.93%), medium (23.01%), high (17.11%) and very high (7.47%). Effective risk management requires communication and awareness-raising. This online mapping application serves as a tool for communication, management and flood prevention in Ouagadougou, helping to mitigate flood-related natural disasters.
文摘随着城市的不断发展,地市级测绘部门在多年的外业测量过程中积累了大量的像控点数据。由于早期像控点数据以文件方式管理,点之记录入时未统一标准,因此需要借助信息化手段来实现像控点精细管理。本文针对像控点管理工作,基于ArcGIS Web AppBuilder框架,以ArcGIS Enterprise为后台,采用ArcGIS API for JavaScript开发平台,结合HTML5+JavaScript+CSS3的主流前端技术,设计出一个用户交互界面良好、操作简单的哈尔滨市主城区像控点管理应用系统,实现了像控点一张图管理,完成像控点整理、查询、编辑修正、资料导出等管理功能,为工作人员提供极大的便利。
基金P.Gao,Y.Xu and F.Song were partially supported by the National Natural Science Foundation of China(NSFC)(Grant Nos.62072309,61532019,61761136011)T.Chen is partially supported by the National Natural Science Foundation of China(Grant No.61872340)+1 种基金Guangdong Science and Technology Department(2018B010107004)Natural Science Foundation of Guangdong Province(2019A1515011689).
文摘JavaScript has become one of the most widely used languages for Web development.Its dynamic and event-driven features make it challenging to ensure the correctness of Web applications written in JavaScript.A variety of dynamic analysis techniques have been proposed which are,however,limited in either coverage or scalability.In this paper,we propose a simple,yet effective,model-based automated testing approach to achieve a high code-coverage within the time budget via testing with longer event sequences.We implement our approach as an open-source tool LJS,and perform extensive experiments on 21 publicly available benchmarks.On average,LJS is able to achieve 86.5%line coverage in 10 minutes.Compared with JSDEP,a state-of-the-art breadth-first search based automated testing tool enriched with partial order reduction,the coverage of LJS is 11%-19%higher than that of JSDEP on real-world large Web applications.Our empirical findings support that proper longer test sequences can achieve a higher code coverage in JavaScript Web application testing.
