期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
历史时期乌兰布和沙漠风沙活动的沉积学记录与沙漠化防治途径分析 被引量:12
1
作者 贾铁飞 赵明 +1 位作者 包桂兰 银山 《水土保持研究》 CSCD 2002年第3期51-54,57,共5页
根据乌兰布和沙漠全新世风成砂的沉积记录和湖相沉积中风积物的沉积记录 ,认为历史时期以来 ,乌兰布和沙漠风沙活动主要受自然环境变化的制约 ,沙漠化过程也是一个以自然作用为主、人为作用为辅的过程 ,沙漠化防治的基本途径是建立稳定... 根据乌兰布和沙漠全新世风成砂的沉积记录和湖相沉积中风积物的沉积记录 ,认为历史时期以来 ,乌兰布和沙漠风沙活动主要受自然环境变化的制约 ,沙漠化过程也是一个以自然作用为主、人为作用为辅的过程 ,沙漠化防治的基本途径是建立稳定的绿洲生态农业 ,以“绿洲化”防治“沙漠化” 展开更多
关键词 乌兰布和沙漠 历史时期 风沙活动 沉积学记录 沙漠化防治
下载PDF
Fractal and its application to sedimentology 被引量:1
2
作者 余继峰 李增学 韩美莲 《Journal of Coal Science & Engineering(China)》 2002年第2期31-37,共7页
In the paper,the foundation,development,basic conception and general characteristics of fractal and the calculating method of the fractional dimension are expounded briefly, and the current situation and prospect of t... In the paper,the foundation,development,basic conception and general characteristics of fractal and the calculating method of the fractional dimension are expounded briefly, and the current situation and prospect of the fractal application in sedimentology are discussed stressly. Both sedimentary process and sedimentary record behave the fractal feature of the self similarity structure. External form and internal texture of the sediments and the distribution of the grain size of the sediments are of fractal feature very well, and the size of the fractional dimension is the quantitative index of the complexity of the background when they are formed. The further analysis on the multi fractal feature of the sedimentary body is the base of the fractal simulation and forecast, and it is the key of the application of the fractal theory to sedimentology. 展开更多
关键词 FRACTAL fractional dimension sedimentary body multi fractal sedimentary process sedimentary record
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部