二维浅水方程运行流场，采用有限元法变成，采用不规则三角形网格的分步杂交方法，在前半步长用特征线法，后半步长用集中质量有限元方法求解方程，是变边界模型-Two-dimensional shallow water equations to run the flow field into a finite element method, using irregular triangle mesh step-by-step hybrid methods, with the former half-len

运用lingo解决直角三角形，外切正方形的面积的最大值，lingo在解决优化问题时，效果明显-Using lingo to solve right triangle, circumscribed square area of the maximum size of lingo in solving the optimization problem, the obvious effects using a mesh quality indicator

自编有限元Fortran程序，三角形网格划分，计算悬臂梁位移分布，悬臂端受集中力。-Finite element self Fortran program, the triangular mesh, displacement distribution is calculated cantilever, the cantilever end by concentration.