121气象信息电话语音系统设计

介绍了121气象信息电话语言系统的基本原理和构架，对系统构架和应用软件开发提出了具体建议和思路。     

河南兴农网Internet实现技术

介绍兴农网的信息流程、互联网的系统结构，分析构建Internet的软件系统和网络通信技术及安全技术。     

Assessing environmental impacts of urban growth using remote sensing

ABSTRACT

This paper provides a study of the changes in land use in urban environments in two cities, Wuhan, China and western Sydney in Australia. Since mixed pixels are a characteristic of medium resolution images such as Landsat, when used for the classification of urban areas, due to changes in urban ground cover within a pixel, Multiple Endmember Spectral Mixture Analysis (MESMA) together with Super-Resolution Mapping (SRM) are employed to derive class fractions to generate classification maps at a higher spatial resolution using an Artificial Neural Network (ANN) predicted Wavelet method. Landsat images over the two cities for a 30-year period, are classified in terms of vegetation, buildings, soil and water. The classifications are then processed using Indifrag software to assess the levels of fragmentation caused by changes in the areas of buildings, vegetation, water and soil over the 30 years. The extents of fragmentation of vegetation, buildings, water and soil for the two cities are compared, while the percentages of vegetation are compared with recommended percentages of green space for urban areas for the benefit of health and well-being of inhabitants. Changes in Ecosystem Service Values (ESVs) resulting from the urbanization have been assessed for Wuhan and Sydney. The UN Sustainable Development Goals (SDG) for urban areas are being assessed by researchers to better understand how to achieve the sustainability of cities.     

基于SOA的任务调度框架设计与实现

结合面向服务的体系结构(Service-Oriented Architecture,SOA)的思想,依托工作流引擎技术建立一套任务调度框架,以满足气象预报管理任务对业务节点、流程和场景灵活便捷调度的需求。通过实现以节点为中心的功能算法一体化管控,满足流程节点构件化注册和资源复用;通过可配置的流程装配模式,实现在气象预报业务任务的快速编排;通过流程场景描述和状态可视化跟踪的模式,实现对业务流程全生命周期的可视化监控。该研究成果在气象预报管理业务系统中得到应用,取得较好的效果。     

Mapping flood pressure points: assessing vulnerability of the UK Fire Service to flooding

A vulnerability index for the Fire Service in the UK has been designed to identify vulnerable locations during episodes of severe floods. Taking recent case studies with the UK Fire Service, the patterns of vulnerability, in terms of demand on time and resources, can be explained by investigating the environmental causes and their interaction with the adaptive capacity of the response agencies.

网络二维地图与三维虚拟场景集成探讨

文章以网络二维地图和三维虚拟场景集成为主要线索,从常用空间数据三维模型建模方法出发,探讨了集成的总体思路。并从系统的角度讨论了网络环境下二三维集成的体系结构及集成后各模块之间的通信方法。在实例研究部分,设计并实现了一个二三维集成的原型系统。最后对网络二维地图与三维虚拟场景集成进行了展望。     

Web GIS在水质信息系统中的应用研究

目前雪野水库水质监测与评价采用现场采样,实验室分析的人工方法,针对该方法不能反映水质指标在空间和时间上的分布状况问题,本文提出了基于Web GIS的水质信息系统设计方案。水质数据采集设备将采集到的水质信息利用移动网的GPRS无线网络可以及时发送到数据处理和监控中心,系统充分发挥GIS在水质评价中的优势,自动完成评价过程。评价结果可以生成水质污染专题图,直观显示水库水质的时空分布状况。Web GIS强大的空间分析与统计功能为水质信息管理的标准化、网络化、空间化提供了有效的工具。     

地理信息系统的演进与发展

分析了地理信息系统产生和发展的背景、地理信息系统软件体系结构和开发模式的发展变化,并基于开放的思想提出地理信息系统将向以网络服务和网格服务为主要形式的开放式GIS方向发展,以实现地理信息的共享与空间数据互操作以及信息资源共享与协同解决问题。