1) Helmert method of variance components estimation
赫尔墨特方差分量估计
1.
Through Helmert method of variance components estimation, unit weight variances of observation data are equal(or the ratio of unit weight variances is approximate equal to one), and the reasonable and theoretical weight matrix is determined.
提出了确定联合反演中相对权比的两步法,第一步是不考虑相对权比,建立两类或多类数据的联合反演模型,通过赫尔墨特方差分量估计使得两类或多类观测数据的单位权方差相等(或单位权方差的比值接近1),从而理论上确定了观测数据合理的权阵,同时对不同种类数据进行了归一化;第二步是在获得合理的观测数据权阵之后,建立顾及相对权比的联合反演模型,以目标函数值为最小来确定权比例因子。
2) Helmert variance component estimation
赫尔默特方差分量估计
1.
On the application of the Helmert variance component estimation to the angular position determination of the Chang E-1 satellite;
赫尔默特方差分量估计方法在嫦娥一号卫星测角计算中的应用
2.
Forming the principle of the triangulated height surveying,this paper analyses error source,uses the method of similar leveling to avoid the error of measuring instrument height,and calculates the precision; With two types of observations,using Helmert variance component estimation,it can improve adjustment precision through multiple iterations.
在特殊地形条件下采用精密三角高程测量和水准测量结合的方法进行高程控制,从三角高程测量的原理出发,分析了误差来源,采用类似水准测量的方法消除仪器高误差,计算出精度;并对两类观测值,利用赫尔默特方差分量估计,通过多次迭代计算,提高平差精度。
3) Helmert-WF variance component estimation
赫尔默特方差估计法
4) Helmert method of variance components estimation(VCE)
赫尔默特方差估计
5) Helmert estimating
赫尔默特估计
1.
This paper brings forward Helmert estimating based on filtering considering error of original data, when knowing the statistical apriority of parameter and original data.
在参数和起算数据的先验统计性质已知时 ,提出了基于滤波的顾及起算数据误差的赫尔默特估计法。
6) variance component estimation
方差分量估计
1.
A data processing method for the precision surveying of ballastless track high-speed railway is put forward:first, choosing the compatible points in the control network by quasi-stable adjustment, then, adjusting the control network with the adjustment model of indirect observation in which the Baarda gross errors detection and Helmert variance component estimation are used.
提出一种适合无碴轨道高速铁路精密工程测量的数据处理方法:先采用拟稳平差选择兼容的起算点,然后应用间接平差模型平差;在平差过程中,用Baarda粗差探测的方法逐个剔除粗差,再用Helmert方差分量估计方法合理地确定边、角的权比。
2.
The variance component estimation to balance the stochastic models of the observations.
应用方差分量估计来协调拟合推估模型中观测噪声和信号向量的随机模型,并分别从极大似然估计、MINQUE估计、赫尔默特方差分量估计三方面构建了拟合推估模型的方差分量解,最后利用新提出的理论与方法,对一幅实际的扫描地形图进行误差纠正,结果表明基于方差分量估计的拟合推估法能够提高扫描地形图的精度。
3.
On the basis of Helmert s formula for variance component estimation, a sequential algorithm for joint adjustment of various observations is put forward in this paper.
在赫尔默特公式的基础上,推导了多类观测数据联合平差中方差分量估计的序贯算法,它区别于以前文献中使各类观测量所对应的验后单位权方差整体趋于一致的做法,而采用逐类(次)平差法,在每次平差后进行方差分量估计,依次使各类观测量的验后单位权方差趋于相等。
补充资料：赫尔
1.奋发貌。 2.光采鲜明貌。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条