1) Helmert Square Error
Helmert后验方差估计
2) Helmert variance estimation
Helmert方差估计
1.
The practice shows that using Helmert variance estimation method to measure the traverse line of river(sea)-bridge is more accurate than common variance software;it solve the problem of the big difference of side lengths surveyed in traverse network and lowmetering accuracy of angle.
但存在两类不同性质的观测值和导线边长不等的问题,文中结合某大桥施工加密控制测量的实际情况,对跨江(海)导线测量中边长相差较大等问题,采用Helmert方差估计方法,分析平差过程中权的合理取定问题。
3) variance component estimation of Helmert
Helmert方差分量估计
1.
The method,variance component estimation of Helmert type, is often used to solve the problem that the weight ratio of different kinds of observations or different precision observations is incorrect.
Helmert方差分量估计是合理确定不同类观测值或不同种精度观测值权比的常用方法。
4) Helmert variance components estimation
Helmert方差分量估计
1.
Equivalence of rigorous formula to simplified formula of helmert variance components estimation;
Helmert方差分量估计严密公式与简化公式等价性的证明
5) Helmert type for estimating variance components
Helmert型方差分量估计
6) posterior variance estimating
验后方差估计
1.
This paper introduced the reason of using helmert variance component estimating for the gross error detecting of side-angle measurement network,studied the principle of using helmert variance component estimating and iteration method with variable based on posterior variance estimating for the gross error detecting of side-angle measurement network.
阐述了边角网粗差探测中利用Helmert方差分量估计的原因,研究了利用Helmert方差分量估计以及验后方差估计选权迭代法进行边角网粗差探测的基本原理,然后通过算例验证了该方法。
补充资料：简便验方
简便验方
?方书。又名《简便至宝》。2卷。清胡其重(易庵)辑。此编分中风中寒中气诸方、中寒伤寒瘟疫诸方、中暑昏冒诸方等22门，汇录内、外、妇、儿各科“济急救危，至简至便”验方。现存雍正七年(1729年)新安汪氏重校刊本，道光二十二年(1842年)张谦吉重订本。?即《保安堂三补简便验方》之简称。
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