| 1. | Orthogonal coordinate systems ; general concepts
正交坐标系.一般概念 |
| 2. | Orthogonal coordinate systems ; differential operators of vector analysis
正交坐标系.向量分析的微分算子 |
| 3. | With the development of production and technology , non - orthogonal coordinate system is demanded in more and more fields
随着生产和科学的发展，出现了越来越多的场合要求采用非正交系坐标测量系统。 |
| 4. | A mathematic model for cooling water discharge to forked bays is established by using the boundary fitted orthogonal coordinate system to simulate the complex boundaries , the full implicit coupled solution model to discrete the base equations , and the matrix chase - after method to solve the algebraic equations
摘要采用正交边界拟合坐标变换模拟复杂的边界，全隐式耦合模型离散基本方程，矩阵追赶法求解代数方程组，建立了分叉型海湾温水排放数学模型。 |
| 5. | The expression of the improved boussinesq equations in curvilinear orthogonal coordinate system is derived . on the basis of poission equation conversion , the methods to generate curvilinear orthogonal grids are introduced , and then the two - dimensional numerical wave model under curvilinear orthogonal coordinate system is established
推导了正交曲线坐标系下的改进型boussinesq方程，以poission方程变换为基础，建立拟合正交曲线坐标系下正交曲线网格的生成方法，进而建立正交曲线坐标系下的二维波浪模型，提高了模型对复杂地形的适用性。 |
| 6. | I carried my research on both the two computation methods and fruitful results were obtained . for the fdtd method , i solved the instability problem of the method in the non - orthogonal coordinate system . for the pwe method , i introduce the linear transform in to calculate analytically the fourier coefficients of complicated photonic crystals
对于有限时域差分方法，我解决了一个影响这种方法在斜坐标使用的稳定性问题，得到了传统的yee型差分在斜坐标里的扩充；对于平面波展开方法，我引入了线性变化求富里叶展开的系数，这种方法的好处可以很方便快捷的获得复杂光子晶体的富里叶系数。 |
