文章运用RF算法提取了江西省寻乌县不透水面的遥感信息,分析了研究区不透水面的长记忆性,结果表明二者在log(R/S)与log(t)的双对数曲线存在两个无标度区间,且存在两个分界点,反映了二者之间的年代际长程相关性.同时也说明不透水面无论在12年的短时间尺度上,还是在相当长的时间尺度范围内(超过17年范围)具有长记忆性,而当时间尺度大于12年时,其序列呈现的记忆性更强,即在较大的时间尺度范围内,未来不透水面的变化趋势和过去的变化趋势一致,当过去不透水面呈增加(减小)趋势时,未来的不透水面也势必呈增加(减小)的趋势.

分析了目前GIS实验教学存在的弊端,探讨了工程驱动下的GIS实验教学模式设计与实践.根据南昌工程学院的"水利特色",将基础性实验、启发性实验、设计性实验、工程性实验紧密联系,以为我校水文与水资源工程专业《地理信息系统》实验课为例,设计了其实验课.

This paper mainly introduces a processing method of regional map data of dynamic atmospheric corrosion.The method establishes the normalized correlation model between corrosion rate of metal to be detected and atmospheric environ-ment database,and the data weight are determined in the model.Compared the partitioned corrosion rate and corresponding standard rate within the preset time interval,the atmospheric corrosion levels in corresponding sub regions can be calculat-ed.The color which matches the corrosive grade from the color storage area is filled into the corresponding sub region of the region map,and the atmospheric environment data text with the largest weight is inserted into the sub region.Through these operations,a dynamic regional map of atmospheric corrosion can be formed and exported,thereby the main environmental factors and continuous variable process within the course of corrosion time in monitoring areas can be determined.