国家数字地震台网中心实时处理及大地震速报软件系统

国家数字地震台网中心实时系统是国家数字地震台网的重要组成部分。其软件系统主要功能有: 实时收集、存储47个国家数字地震台的地动波形数据,进行地震事件实时检测、自动定位、报警、人机结合精确定位。可速报国内M_S≥5.0、邻区M_S≥6.0、世界范围M_S≥7.0地震的震源位置及震级。软件系统的主要特点: 双机热备份,使用多种编程技术,具有实时性好、可靠性、稳定性高。提出地震定位计算法的几何背景,双曲线与圆相交地震定位法等。丰富和发展了地震定位理论,解决了初始定位长期得不到解决的问题,在全球大地震速报工作中取得了很好的效果。人机交互系统,操作简便,用图形和数字给出丰富的信息,有助于分析地震波形和地震定位结果,是一个计算机辅助思维、分析系统。     

基于IDL的地层三维可视化

以钻孔资料为源数据,利用克里格为插值方法,生成了相关地层的规则网格数据,并基于IDL实现了地层三维的可视化,并运用了光度学、色度学的算法实现视觉效果,引入了消隐、光照模型、颜色模型等技术,增强了地层可视化的仿真效果。利用本系统,可实现实时放大、缩小、旋转、平移并对每一个地层表面调色等功能,使得难以观察的地层可以逼真的展现在人们面前,提高了人们对地层的认知能力。     

气象灾害电视报道策划

分析气象灾害的电视报道特点，探讨扬长避短发挥电视媒介优势，归纳气象灾害各阶段电视报道策划着眼点和侧重点，提出增强传播和服务效果的一些思路，供策划人员参考。     

短临交互预报系统VIPS设计开发与应用

介绍了短时临近交互预报系统VIPS(Very-short-range Interactive Prediction System)的设计理念、开发思路及其功能实现。该系统设计基于开放理念,采用Java语言及开源软件,可跨平台运行,便于系统的开发及升级维护。以开源地理信息软件OpenMap为核心,将丰富的实况探测资料(如区域雷达资料、自动站资料、闪电定位资料)、雷达外推预报和风暴追踪产品及0～6小时数值预报产品与精细的地理信息以图层形式进行叠加,可对风暴的发生、发展在短时临近时间段内进行综合分析。基于对短时临近预报相关实况探测资料及短时临近预报产品的综合分析,可实现预警产品的人机交互快速编辑、制作精细化的预警产品并快速分发,满足了北京奥运会气象预警制作发布及现场服务等需求。     

动态冠层模型ICM的改进及其对中高纬地区植被季节和年际变化的模拟试验

植被动态冠层模型Interactive Canopy Model(ICM)考虑了生态系统中较完整的碳氮循环过程,能够较为客观真实地描述较短时间尺度上植被的动态变化特征.本文在ICM原有碳氮分配方案基础上,考虑了植物花、果实等新生组织对碳氮分配的影响,假设新生组织碳库是花期以后植物的主要碳汇之一,并利用物候模型Fore-...     

VRML技术在城市景观交互显示中的应用

VRML是Internet上基于WWW (WorldWideWeb)继HTML后的第 2代Web语言 ,利用VRML技术实现城市景观交互显示 ,可以真正地实现面向对象、跨平台、分布式网络浏览 ,在城市GIS中有重要意义 ,文中对VRML技术在城市景观交互显示中的应用进行研究与实践并给出实验结果     

面向MIS系统的程序设计——数据交互屏幕处理系统的实现

本文主要介绍管理信息系统中数据录入功能的程序设计方法,它首次提出并实现了程序与数据在结构上分离在功能上耦合的新思想。该系统对任何数据库系统的一般录入程序无需编写程序,只需通过调用接口程序 DATAMAKE,FOX 即可实现按卡片、表格、课本三种屏幕方式的数据录入功能。系统采用 FOXBASE+2.0完成。     

Mixing Methods and Triangulating Results to Study the Influence of Panning on Map Users’ Attentive Behaviour

The general aim of this paper is to evaluate the influence of panning on the map user’s (attentive) behaviour, using a mixed methods approach. A user study was conducted in which participants – with an expertise in cartography – had to execute four tasks in Google Maps, using only a panning operation. During the first two tasks, participants had to follow a predefined route; during the latter two tasks they had to locate Belgium on a less detailed scale level. A strong task-related interactive behaviour was revealed by the participants’ mouse action and eye movements. Furthermore, the attentive behaviour was influenced by the type of view (map or satellite) and whether it occurs while performing the panning operation. The georeferenced eye movements were imported in a GIS for spatial analysis. Based on these spatial queries, we discovered that the duration of the fixations was associated by their location on the map.     

In-depth examination of spatiotemporal figures in open reproducible research

ABSTRACT

Figures such as maps and time series are essential means to visualize spatiotemporal results in scientific papers. Being able to recompute them using the underlying source code and data is thus a core aspect in reproducible research. However, many scientists see the preparation of code and data for publication as an additional burden without immediate benefits. In this work, we investigate advantages and new capabilities of reproducible research papers. Our key contributions are (i) the extension of a geoscientist’s workflow while examining papers including reproducible figures such as maps and (ii) the prototypical implementation of the workflow as a web application. The workflow is based on current practices of geoscientists and encapsulates benefits of reproducible figures. It is informed by ideas and needs identified by geoscientists in a survey, interviews, and a focus group. Based on their statements, we first extend the traditional workflow steps Discovery and Inspection by additional capabilities and propose two new steps: Manipulation of the content of a spatiotemporal figure and Substitution of the underlying code and data. The extended workflow and its implementation might facilitate in-depth examination and reusability of geoscientific results.