| 1. | Numerical simulation study of fine - mesh compartment of mountain agroclimatic resource in beijing mentougou area
北京市门头沟山区农业气候资源细网格数值模拟研究 |
| 2. | The number of the grid in the focast area of the coarse nest is 65 71 while that of the fine nest is 73 82
预报区域格点数粗网格为65 71 ，细网格为73 82 。 |
| 3. | We also used 5 levels amr grid to simulate the helmholtz multi - fluid instability , but not compared the cpu time with each other yet
我们也采用过五级剖分，由于均匀细网格的计算量太大无法比较耗费的时间。 |
| 4. | In addition , we compared the cpu time for a model with 3 levels amr grid and the same accuracy uniform grid . it ' s about 8 times for the latter over the former
计算中利用同一模型对比了自适应三级网格剖分和同样均匀细网格耗费的cpu时间，耗费时间比约为1 ： 8 。 |
| 5. | The two - level method involves solving one small , nonlinear coarse mesh system , one oseen problem on the fine mesh and one linear correction problem on the coarse mesh
这种二层方法解一个小的，非线性的粗网格系统，一个细网格上的oseen问题以及一个粗网格上的线性校正问题。 |
| 6. | Choose 120 e , 43 ? n as the operation center of the model and use two layers of nested schemes . the resolution ration of the coarse nest is 51km while that of the fine nest is 17km
选定120 e 、 43 n为模式运行区域中心，采用2层套网格方案，粗网格分辨率为51km ，细网格分辨率为17km 。 |
| 7. | In this approach , the full nonlinear system is solved on a coarse grid . the nonlinearities are expanded about the coarse grid solution , and the resulting linear system is solved on a fine grid
这些算法的特点是仅在粗网格上进行非线性问题的计算，而在所需要求解的细网格上只进行线性问题的计算。 |
| 8. | Comparing the computed values with those of 50 tidal observatories , we find that the computational precision with fine grids and moving boundary are generally higher than that with wide grids or fixed boundary
沿岸50个潮位站计算与实测值的比较表明，加入动边界以后的小区域细网格计算较之粗网格以及未加动边界以前的情况，精度都有普遍提高。 |
| 9. | The coarse grids are obtained by agglomerating the fine grids . the solution of coarse grids is driven by the fine grids " residue , and the solution on the coarse grids is used to correct the solution on the fine grids , which can eliminated all parts of frequency errors on the fine grids
粗网格上的解由细网格上的残值来驱动，粗网格上的解对细网格上的解进行修正，这样就能较快地消除细网格上解的高低频误差，加速解的收敛，提高计算效率。 |
| 10. | This thesis is to present and analyze one class of regularized multi - grid algorithms ( rmga ) for solving operator equations of the first kind . the rmga employs tikhonov ' s regularization to solve the corase grids equations with a new choicing parameter ' s posteriori - method for improving the numerical stability , and adopts a new smoothing strategy to correct the solutions on the fine grids for preserving the high efficiency of mgm . meanwhile , some key technical problems in the process of implementation of rmga are disscussed
本文将提出一类适合第一类算子方程的正则化的多重网格算法，它结合一种新的正则参数选取准则，应用tikhonov正则化来求解粗网格方程保证了求解的稳定性；而在将解向细网格延拓时使用了一种新的光顺处理策略。 |
