摘要
本文基于虚拟权平差函数模型,首先推导了单位权方差σ_0~2的边缘极大似然估计(?)_0^(n^2),证明了(?)_0^(n^2)是σ_0^(n^2)的无偏、有效估计量,然后构造了σ_0~2的另一无偏估计(?)_0~2,通过平差实例验证了(?)_0~2的基本有效性.
Based on the functional model of guasi-weight adjustment, this paper first derives the marginal maximum likelihood estimation of unit-weight variance. It proves that is the unbiased effective esti-mation. Then,it constructs another unbiased estimation of By a case history of adjustment ,it verifies the fundamental effectiveness of (?)
出处
《勘察科学技术》
1995年第2期48-51,41,共5页
Site Investigation Science and Technology
基金
中国有色金属工业总公司"八五"重点资助项目
关键词
虚拟权平差
方差
统计性质
误差
扩建网
矿井
guasi-weight adjustment
variance of unit weight
marginal maximum likelihood estimation
sta-tistical properties.
