a coarse mesh method, in which the theory of nodal green's function method is adopted, is applied to get the adjoint neutron flux, after a transformation of adjoint flux equations has been made.
hence, these local and parallel algorithms only involve one small original problem on coarse mesh and some correction problems on local fine grid.
因此,这种局部和并行算法仅仅涉及一个粗网格上的整体逼近和细网格上的局部校正。
ensure the accuracy of computing, using the local mesh refinement approach, which solute the difficult of coarse mesh can not identify the smaller size barrier.
并通过局部网格加密的方法,解决了粗糙网格划分下无法识别较小尺寸障碍物的困难,以及保证了运算精度。
the advantage of this method is that we only need solve a small nonlinear problem on a coarse mesh finite element space ■, and solve a linear problem on a fine mesh finite element space ■(h■h).