3 . the calculating elements and the calculating model of rib - column , rib - beam and retaining plate of the supporting structure are proposed in this paper 3 、提出了肋柱、肋梁和擋土板的計算單元劃分以及計算模型的確定方法。
In the first place , the study processed data of remote sensing and non - remote sensing to be digital , vector , raster and imagery geocode , established geographic database of soil erosion , and calculated elements " pixel maps of soil erosion . secondly , by using model builder of arcview to establish dynamic survey model of soil losses in longchuan river drainage basin . at last , to obtain maps of status & the forecast maps for soil conservation 首先通過遙感與非遙感資料的數(shù)字化、矢柵化及圖形圖像地理配準(zhǔn),建立了水土流失地理數(shù)據(jù)庫,并運算出水土流失各因子像元圖;在此基礎(chǔ)上,憑借arcview子模塊modelbuilder的支撐,建立龍川江流域水土流失動態(tài)監(jiān)測模型;最后運行該模型獲取水土流失現(xiàn)狀圖和防治預(yù)報圖等結(jié)果圖件,完成了研究區(qū)1998 、 1999年水土流失定量遙感監(jiān)測任務(wù)。