测绘工程
測繪工程
측회공정
ENGINEERING OF SURVEYING AND MAPPING
2015年
9期
1-4
,共4页
不确定度理论%平差模型%参数有界%最小二乘估计%沉降监测网
不確定度理論%平差模型%參數有界%最小二乘估計%沉降鑑測網
불학정도이론%평차모형%삼수유계%최소이승고계%침강감측망
uncertainty theory%adjustment model%parameter-bounded%the least squares estimation%subsidence monitoring network
文中基于测量不确定度理论，建立参数有界约束下的平差模型及其解算方法。顾及变形监测网特点，将该平差模型及算法应用到沉降监测网实例中，即利用已知先验信息，建立相应约束模型，求得有界条件下的参数最优估值。通过与经典最小二乘平差法比较，结果证明模型的有效性，估计的参数值控制在给定范围内且不“失真”，其沉降量更接近实际情况。
文中基于測量不確定度理論，建立參數有界約束下的平差模型及其解算方法。顧及變形鑑測網特點，將該平差模型及算法應用到沉降鑑測網實例中，即利用已知先驗信息，建立相應約束模型，求得有界條件下的參數最優估值。通過與經典最小二乘平差法比較，結果證明模型的有效性，估計的參數值控製在給定範圍內且不“失真”，其沉降量更接近實際情況。
문중기우측량불학정도이론，건립삼수유계약속하적평차모형급기해산방법。고급변형감측망특점，장해평차모형급산법응용도침강감측망실례중，즉이용이지선험신식，건립상응약속모형，구득유계조건하적삼수최우고치。통과여경전최소이승평차법비교，결과증명모형적유효성，고계적삼수치공제재급정범위내차불“실진”，기침강량경접근실제정황。
Uncertainty is inevitable ,but for the data processing ,the existence of uncertainty will influence the reliability of the parameter estimation . Based on the uncertainty theory , a parameter-bounded adjustment model and the algorithm is established . Considering the characteristics of deformation monitoring network ,it uses the model and algorithm to the instance of subsidence monitoring network , establishes constraint model by using the know n prior information ,and calculates the optimum estimations of parameters under the bounded conditions .By comparing with the traditional least squares adjustment method ,it proves the model is effective that the estimations of the parameters are in the given ranges , without “distortion” ,of which the subsidences are closer to the actual situation .
