Watershed segmentation is a region-growing method. In watershed segmentation,using gradient image catchment basins represent the regions of the segmentation

轴向流动涡轮的准三维计算程序。并进一步将该程序扩展为径向和混合流动的涡轮。程序使用速度梯度方法。-A quasi-three-dimensional compressible flow analysis has previously been reported for axial flow turbines. This analysis has been generalized to allow for mixed or radial flow and for nonuniform in

用共轭梯度法求解方程组、一种最优化方法（适用于求解超定、欠定方程组）-Conjugate gradient method for solving equations, an optimization method (for solving overdetermined, underdetermined equations)