期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
基于B/S架构的船舶室内最短逃生路径优化算法及实现
1
作者 李莹 赵宁曦 《测绘地理信息》 CSCD 2024年第4期24-30,共7页
船舶室内安全问题受到越来越多的关注,在遇到突发事件时,GIS的最短路径分析可模拟最短逃生路径。鉴于船舶拓扑结构的复杂性,使用经典Dijkstra算法计算最短路径过于缓慢。首先,以一条9层甲板的船舶CAD数据为例,提出了一种基于浏览器/服务... 船舶室内安全问题受到越来越多的关注,在遇到突发事件时,GIS的最短路径分析可模拟最短逃生路径。鉴于船舶拓扑结构的复杂性,使用经典Dijkstra算法计算最短路径过于缓慢。首先,以一条9层甲板的船舶CAD数据为例,提出了一种基于浏览器/服务器(browser/server,B/S)结构的分层分区最短路径优化算法;然后,采用Java本地接口(Java native interface,JNI)编程方法调用底层C/C++编写的算法进行计算;最后,利用Web图形库(Webgraphics library,WebGL)技术实现船舶三维场景和最短逃生路径的可视化。结果表明,分层分区算法可有效削减计算量10%~80%,跨层数越多、跨区域数越少时,优化效果越明显;采用控制变量法对比分析可知,该算法的计算效率较未优化算法提高了50%以上,且在B/S架构下的效率较客户端/服务器(client/server,C/S)架构提升了25~50倍。 展开更多
关键词 CAD 浏览器/服务器(browser/server B/S) Java本地接口(Java native interface JNI) Web图形库(Web graphics library Web GL) 分层分区算法
原文传递
Generating native user interfaces for multiple devices by means of model transformation
2
作者 Ignacio MARIN Francisco ORTIN +1 位作者 German PEDROSA Javier RODRIGUEZ 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2015年第12期995-1017,共23页
In the last years, the types of devices used to access information systems have notably increased using different operating systems, screen sizes, interaction mechanisms, and software features. This device fragmentati... In the last years, the types of devices used to access information systems have notably increased using different operating systems, screen sizes, interaction mechanisms, and software features. This device fragmentation is an important issue to tackle when developing native mobile service front-end applications. To address this issue,we propose the generation of native user interfaces(UIs) by means of model transformations, following the modelbased user interface(MBUI) paradigm. The resulting MBUI framework, called LIZARD, generates applications for multiple target platforms. LIZARD allows the definition of applications at a high level of abstraction, and applies model transformations to generate the target native UI considering the specific features of target platforms. The generated applications follow the UI design guidelines and the architectural and design patterns specified by the corresponding operating system manufacturer. The objective is not to generate generic applications following the lowest-common-denominator approach, but to follow the particular guidelines specified for each target device. We present an example application modeled in LIZARD, generating different UIs for Windows Phone and two types of Android devices(smartphones and tablets). 展开更多
关键词 Model-to-model transformation native user interfaces Model-based user interfaces Model-driven engineering
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部