VR-GIS技术在数字黑河流域飞行模拟中的应用

以黑河流域为例,将VR-GIS技术应用在数字流域的飞行模拟中。资料预处理阶段,制作了流域Landsat TM/ETM+数字镶嵌图、DEM数据和矢量图层。利用ERDAS IMAGINE的VisualGIS模块,集成多层数据,通过人机交互进行参数设定,最终实现流域的飞行模拟。飞行模拟结果表明,从黑河上游到下游动态地俯视其沿线的地形、地貌、植被覆盖状况,浏览者可以获得比二维数字镶嵌图更为直观、生动和形象的认识。     

Experimental Instrumentation for Measurement of Reactivity Temperature and Voiding Effects at Zero Power Research Reactors

The paper describes the instrumentation for studying temperature and void reactivity effects that were developed at VR-I zero power reactor. Further are described its operational parameters, fields and ways of its utilization as well as issues connected to its implementation into the reactor core.