均质区域

接着说明本课题采用均质区域的假设，选择贫困地区为研究区域的原因。

Explained this topic adopt assumption of " isotropic region ", and choose poverty-stricken zones for study reason of zones .

均质区域可用泰森三角形、趋势面、聚类分析等方法进行区划；

Regions consist of equal region and nub region and equal region can be divided with the methods of Taisen triangle , trend surface , clustering and so on ;

通过移动阈值与扩展最小变换多层次地标记纹理和灰度的均质区域。

Multi-level marker location algorithm is subsequently used to locate significative regions that are homogeneous in terms of texture and intensity , by moving threshold and extended minima transform .

通过均质和区域非均质两个分数阶粘弹性参数组合反演的算例，对所提方法的反演计算精度和计算效率进行了测试，并探讨了数据噪音对反演结果的影响。

The computing accuracy and efficiency of the proposed method are tested via numerical examples of combined identification for fractional viscoelastic parameters in cases of homogeneity and regionally inhomogeneity , and the effects of date noise are considered .

边界元方法适用于线性、均质问题和无界区域问题，但受问题及区域的复杂性的限制；有限元方法则适合求解有界区域问题，可以求解非线性的、非均质的问题。

BEM is applicable to lin-ear , homogeneous and unbounded region , but restricted by the complexity of the problem and the region . BEM is suitable for solving nonlinear and inhomogeneous problems in bounded areas .