spatial statistics

The particular spatial statistics visualization and spatial analysis functions of GIS provide great technological supports for the informational management of the city drainage system which is spatially distributed.

城市排水系统具有典型的空间分布特征，GIS特有的空间数据可视化及空间分析功能，为城市排水系统的信息化管理提供了强有力的技术支持，将GIS应用于城市排水管理是一种必然趋势。

Generally speaking, spatial weight matrixes have little effect on finite sample properties of these test statistics. 2.

一般来说，空间权重矩阵的选取对检验统计量的有限样本性质影响不大。

At present, the video compression technologies mainly focus on three aspects of elimination of redundant data: spatial redundancy, temporal redundancy and statistics redundancy.

当前，视频压缩技术主要从三个方面消除数据中的冗余：空间冗余、时间冗余和统计冗余。

What more, the test statistics are more effective with the increase of spatial correlation and sample size.

此外，随着空间相关性和样本量的增大，各检验统计量更为有效。

In the spatial domain, the second-order statistics of a gray level co-occurrence matrix are used as the features. In the frequency domain, Gabor filters are used for image filtering, and then textural features are extracted.

空域上，采用了灰度共生矩阵的二阶统计量作为特征：频域上，采用了Gabor滤波器对图像进行滤波，进而提取特征。

Application of Non-Parametric Statistics and Artificial Intelligence Technology in Spatial Variability of Water-Soil

非参数统计与人工智能技术在水土空间变异中的应用研究

Texture statistics are extracted from the Spatial Grey Level Dependency Matrix of each image.

利用灰度共生矩阵提取图像的纹理特征量。