方程树
方程树
采用事件树分析法进行风险分析并建立了数学模型,包括火灾模型、有效释放率模型、热强度极限值、危险区域等式四部分。
Based on the data of forest resources inventories of Henan Province in 2003, forest biomass carbon storage is estimated using regression equation between biomass of various tree species and volume.利用2003年河南省森林资源清查资料,建立不同优势树种生物量与蓄积量之间的回归方程,对河南省森林的碳储量进行了推算。
Parabolic curve function, power function, Richards equation and single molecular equation, related tree height to diameter at breast height and widely used in forest gap model, were analysed.为了更准确地描述树高与直径的关系,文章综合分析了广泛应用于林窗模型中的四个数学方程,即二次曲线、幂函数方程、理查德方程和单分子方程。