| 1. | The finite-difference computation must be convergent and stable .
有限差分计算必须收敛和稳定。 |
| 2. | By using one - dimensional finite different hydrodynamic code coupled with four spall models , spall in ductile metal has been studied
摘要在平面一维弹塑性流动有限差分计算程序中加入4种延性金属层裂模型，对平板撞击层裂实验进行数值模拟。 |
| 3. | The synchronization filter filtrates the thin square noise when the color threshold is depressed to obtain a more intact detection
边缘检测时通过降低差分计算的颜色阈值获取更为完整的检测结果，同时利用空间滤波器去除由颜色阈值的降低所引发的大量小面积噪声。 |
| 4. | Under calculating background , we research the uniformity half space and multi - layers models , discuss the effect on studied background results to abnormity and overlapping field
为了提高计算精度和计算速度以及避免由源奇异性引起的差分计算复杂性，计算时将电位分成二次异常电位和背景电位2部分。 |
| 5. | In order to improve the quality of laplace operator image segmentation at a high real time capability this paper presented a synchronization dimensional structure filter for laplace operator
摘要为了在继承拉普拉斯算子高实时性的前提下提高图像分割质量，设计了一个可与拉普拉斯算子差分计算同步进行滤波工作的空间滤波器。 |
| 6. | In this paper , research on predicting service life of reinforced concrete component exposed to chloride environment was made : firstly , a finite difference model is developed for predicting the process of chloride penetrating into concrete
本文对氯离子侵蚀环境下钢筋混凝土结构耐久寿命预测进行研究，完成以下一些工作：首先，综合考虑多种因素影响，建立有限差分计算模型。 |
| 7. | In this thesis , a new finite difference time domain ( fdtd ) method is developed to treat a two - dimensional photonic crystal consisting of nearly - free - electron metals . the method is used to calculate the band structures and investigate defect modes and guide modes in such a photonic crystal
本论文首先发展了一种基于等离子模型的有限差分计算方法，并应用于二维金属光子晶体，有效地计算了该类光子晶体的能带结构。 |
| 8. | In the following section , the thesis demonstrated the robustness of the proposed method in the computation of radiated electromagnetic fields of switched mode power supplies by means of a numerical study on the electromagnetic fields of an electric dipole antenna
应用本文开发基于pml吸收边界条件三维时域有限差分计算软件，计算了电偶极子天线的三维辐射电磁场，并将计算结果与解析解进行了对比分析，验证了时域有限差分法计算高频开关电源辐射电磁干扰的有效性。 |
| 9. | Because computational fluid dynamics ( cfd ) is widely used in the field of large scale science and engineering computation , and explicit difference computing method is widely used in cfd , we made deep research on the automatic parallelization of explicit difference programs for cfd
我们针对计算流体力学cfd ( computationalfluiddynamics )在大规模科学与工程计算中的广泛应用以及显式差分计算方法在cfd计算问题中的普遍使用的实际情况，对cfd显式差分计算程序的自动并行技术展开了深入的研究。 |
| 10. | We analysed the traditional automatic parallelization technology , including dependency analysis theory , program transformation technology , parallel scheme and the optimization of related synchronization and communication etc , which are the theoretical basis of the whole article . cfd computing features , especially the features of explicit difference computing , have also been further ananlysed . we also summarized drawbacks of traditional automatic parallelization technology used in cfd : small parallel granularity , difficulty in attaining global identical data partition , and difficulty in attaining high parallel efficiency on distributed memory system
本文讨论、分析、总结了通用的自动并行化技术：相关性分析理论、程序变换技术、并行模式以及同步通信与优化问题等等，它们是本文研究工作的理论基础；针对研究对象，深入分析了cfd计算的特点，特别是显式差分计算的特点；并归纳出传统的自动并行化技术在cfd应用中存在的问题：并行粒度小、难以获得全局统一的数据划分方式，对于分布存储结构的并行机难以获得高效率。 |
