the distribution laws of 39 soil elements in the loess plateau were studied by trend surface analysis method .
利用趋势面分析法,对黄土高原土壤中3 9个元素含量的区域分布进行了研究。
the water depth data of the sea area of cb6c well in chengdao oil field are processed using trend surface analysis method in this paper, and the water depth errors in water depth survey are analysed.
利用趋势面分析法处理埕岛油田海区cb6c井区的水深数据,识别水深测量中出现的水深误差。
the trend surface analysis method was applied to study maternal mortality of fujian province in 1992 and provided the revelant mathematical model and trend map.
介绍了趋势面分析方法,并将其应用于福建省孕产妇死亡率地域分布的研究。