survey adjustment meaning in English
测量平差
Examples
- Application of semiparametric survey adjustment models in fitting of gps elevation
高程拟合中的应用 - Design of object - oriented survey adjustment software and its online service
面向对象的测量平差软件设计与网络化应用 - Generally , the ill - conditioning problem not only exists in global positioning system ( gps ) data processing , surveying adjustment , observation deformation analysis and geodesy inversion , etc , but also its ill effects are very serious
在gps数据处理、工程控制网平差、形变观测分析、大地测量反演等测量数据处理领域，系统的病态性问题是常见的，并且病态性的危害作用非常严重。 - In order to reduce the deficiencies of ridge estimator , stein shrunken estimator and principal component estimator , two new biased estimators , so - called combining ridge and shrunken estimator , and , combining ridge and principal component estimator , are constructed respectively . their good properties in the mean squared error and the numerical value stability are investigated , the determination of biased parameter of the estimators are discussed , and some important conclusions are obtained , respectively . theory analysis and the computational results demonstrate that the two estimators potential estimator in surveying adjustment
本文针对岭估计、 stein均匀压缩估计和主成分估计存在的缺陷，构造了两种新的有偏估计：岭?压缩组合估计和岭?主成分组合估计，讨论了两种新估计在均方误差意义下和数值稳定性方面的优良性质，讨论了有偏估计中偏参数的选取问题，通过理论分析和算例分析说明这是两种很有潜力的有偏估计。 - In addition , the paper designs a bottom database model , selects a multi - aim strategy combining files with known data , and establishes dual interaction data model that has explicit conceptual structure and directly aims to geographic objects , and provides backing up enquiry language ( g - sql ) . simultaneously , after analyzing and studying methods available for the under pipelines , the paper constructs survey adjustment calculation model , and according to the model , checks the survey of under pipelines . the results indicate that the model is suitable to actual requirement because it greatly increase calculation speed , meeting calculation accuracy requirement
在此基础上，对系统的底层数据模型进行设计，选择了文件与成熟数据库相结合的混合策略，并兼顾面向对象的数据库( oodb )和可扩充数据库( edb )的特点，建立了一个概念层次清晰、面向地理对象实体的双层语义数据模型以及支持模型的查询语言g - sql ，同时对地下管线的各种测试方法进行分析研究，建立了地下管线测量平差计算模型，并以此对所勘测的地下管线进行核算，计算结果表明，计算模型不仅大大提高了核算的速度，同时在计算精度上也符合核算的要求，是符合实际要求的关于测量平差计算的模型。