| Helmert方差估计在桥梁跨江导线网中的应用 |
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| 引用本文： | 李斌,田林亚,刘金平.Helmert方差估计在桥梁跨江导线网中的应用[J].测绘与空间地理信息,2006,29(2):111-113. |
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| 作者姓名： | 李斌 田林亚 刘金平 |
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| 作者单位： | 河海大学,测量工程系,江苏,南京,210098;中港二航局二公司,湖北,武汉,430000 |
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| 摘 要： | 导线网在桥梁施工控制网的加密测量中得到广泛使用,由于存在两类不同性质的观测值以及导线边长度不等的问题,平差时应当考虑边角观测值权的统一和不同观测边权的合理取定。本文结合某特大型桥梁加密控制测量的实际情况,对跨江导线网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,明显地提高了平差结果的精度。
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| 关 键 词： | 跨江导线网 定权 Helmert方差估计 |
| 文章编号： | 1672-5867(2006)02-0111-02 |
| 修稿时间： | 2005年10月8日 |
The Application of Helmert Variance Estimation in Traverse Network Crossing the River |
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| LI Bin,TIAN Lin-ya,LIU Jin-ping.The Application of Helmert Variance Estimation in Traverse Network Crossing the River[J].Geomatics & Spatial Information Technology,2006,29(2):111-113. |
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| Authors: | LI Bin TIAN Lin-ya LIU Jin-ping |
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| Abstract: | Traverse network in the densified survey of bridge control network are used widely.In addition to traverse side with different length,there are two kinds of observation value.So we should consider the unification of the weight of the triangulateration observation value and the selection of different observation side during the adjustment.In this paper,the authors applied the Helmert method to analyze the properly selection of the weight to solve the problem of side length discrepancy relatively greatness during the adjustment,and the precision of the adjustment result can be improved obviously. |
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| Keywords: | traverse network crossing the river fix weight Helmert variance estimation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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