利用影像相关分析的遥感变化检测

针对利用单一光谱特征进行影像相关分析在遥感变化检测应用中效果较差的问题,提出了一种将纹理特征与光谱特征相结合的相关系数计算模型。应用中在对多时相影像进行相同尺度棋盘分割的基础上,先计算各对应分割窗口内的相关系数,再以其中心点的坐标和相关系数值作为一个特征点,在三维空间中进行插值处理得到整个区域的相关系数空间分布图;进一步通过密度分割处理提取变化信息。本文以两期GF-1影像数据进行了变化信息提取试验,结果表明,采用组合特征相关系数的变化检测结果明显优于单一光谱相关系数的变化检测结果。组合相关系数的应用研究为利用影像相关分析方法从高分影像中提取变化信息提供了一种新的思路。

Edge detection in the potential field using the correlation coefficients of multidirectional standard deviations

Most edge-detection methods rely on calculating gradient derivatives of the potential field, a process that is easily affected by noise and is therefore of low stability. We propose a new edge-detection method named correlation coefficient of multidirectional standard deviations（CCMS） that is solely based on statistics. First, we prove the reliability of the proposed method using a single model and then a combination of models. The proposed method is evaluated by comparing the results with those obtained by other edge-detection methods. The CCMS method offers outstanding recognition, retains the sharpness of details, and has low sensitivity to noise. We also applied the CCMS method to Bouguer anomaly data of a potash deposit in Laos. The applicability of the CCMS method is shown by comparing the inferred tectonic framework to that inferred from remote sensing（RS） data.

城市电网本地通信网络数字化感知业务与通信技术适配研究

针对新型本地数字化电力感知业务差异化对通信性能的需求,灵活合理的通信技术适配对建立安全、可靠、经济的电力通信网络至关重要。面向新型电力系统中的新型本地数字化感知场景,首先,对典型本地通信技术和电力业务通信性能需求进行分析和总结,构建了多层多指标维度综合评价模型;其次,提出基于相关系数的模糊层次分析-熵权主客观组合权重法进行通信指标赋权;最后,结合改进的逼近理想解排序法计算加权评价得分获得适配结果。结果表明:所提评价模型和适配算法为新型本地数字化电力感知业务与通信技术适配提供了理论基础和解决方案。