不完全测量数据的EM处理算法  

EM PROCESSING ALGORITHM OF INCOMPLETE SURVEYING DATA

作　　者：林东方[1] 宋迎春[1] 金昊[1] 

机构地区：[1]中南大学地球科学与信息物理学院测绘与国土信息工程系,长沙410083

出　　处：《大地测量与地球动力学》2011年第4期112-115,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40874005);教育部博士点基金(200805331086)

摘　　要：推导了EM算法用于不完全测量数据的实现方法。结果表明,应用EM算法处理不完全测量数据,改善了测量精度,与完全数据下的平差结果极其接近,明显优于不进行平差处理的结果。For the incomplete surveying data caused by various factors, traditional adjustment can not be achieved. It is harmful to the accuracy of the surveying, even leads to abandoned observation data. Through EM algorithm, we can take the potential information which is helpful to improve the accuracy of data processing effectively. EM processing algorithm for incomplete surveying data is proved. The results show that the surveying accuracy is improved by using the EM algorithm to process the incomplete data. The results are extremely similar to the ad- justment results with complete data and significantly better than the results without adjustment.

关 键 词：不完全测量数据 平差 G-M模型 最小二乘原理 EM算法 

分 类 号：P207[天文地球—测绘科学与技术] P203