the reaction kinetics of the sorbent with so2 was well described by the surface coverage model, which assumes that the sulfation rate is controlled by the chemical reaction on the sorbent grain surface and takes into account the surface covered by the product 吸收劑與二氧化硫的反應(yīng)可用表面覆蓋模式很好地描述;該模式假設(shè)吸收劑晶粒表面之化學(xué)反應(yīng)為速率控制步驟,并且考量被產(chǎn)物覆蓋的表面積。
in tradition, building spatial database always choose coverage model, which has some shortages such as it has not special character about the expression of spatial object . with the development of oriented-object technology . geodatabase has appeared representing oriented-object spatial model and stride forward to the objected spatial model 傳統(tǒng)上建立空間數(shù)據(jù)庫在空間數(shù)據(jù)模型上一般選擇coverage數(shù)據(jù)模型,這種數(shù)據(jù)模型在空間對象的表達(dá)上存在特征聚集在類似的點、線、面集合中,不具有特殊的特征行為等種種不足。