biased estimator meaning in English
偏置估计
有偏的估计量
有偏估计量
有偏估计式
Examples
- The biased estimators of the parameters in the linear model with aggregated date
聚集数据的线性模型参数的有偏估计 - In order to get this , some useful explorations on how to analysis and solve the problem of the ill - conditioning have been made and several biased estimators have been put forward . in fact , analyzing the essence , overcoming the effect of ill - conditioning and obtaining more accurate and stable parameters estimator is an new task in gps surveying data processing , which have been determined as an important studying field in contemporary surveying error theory and engineering data processing by the international association of geodesy ( iag )
事实上，分析测量平差系统病态性的实质、克服或减弱测量平差系统病态性的影响、采用有偏估计等方法提高参数估计和平差成果的精度，是当前gps等重大测量工程数据处理中所面临的一个重要课题，它已被国际大地测量协会( iag )确立为现代测量误差理论及数据处理研究中的一项重要内容。 - A new biased estimator so - called ridge type - generalized inverse ( rg1 ) estimator is constructed after summing - up the historical and present condition of biased estimation theory in surveying data processing . the prosperities of rg1 estimator are studied especially by pitman ' s criteria . the other biased estimator so - called partial root root ( prr ) estimator is generated
通过对有偏估计理论在测量数据处理中的应用历史和现状进行总结和分析，构造了未知参数的一种新的有偏估计方法? ?岭型广义逆估计，对其性质特别是在pitman准则下的若干性质进行了讨论；接下来构造了另一种新的有偏估计方法? ?部分根方估计，该估计的最大特点在于它是一种部分压缩估计。 - 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。 - The comparisons between the two most important biased estimators , ordinary ridge estimator and principal components estimator , and ls estimator are conducted by using the criterion of mean squared error ; and the conditions to show the superiority of each of these two estimators over the ls estimator have been obtained . then , the tests have been suggested to verify whether or not these conditions hold in given situations by using the statistical method
在均方误差准则下对目前应用最广泛的两种有偏估计? ?岭估计和主成分估计与ls估计进行了比较研究，得到了岭估计、主成分估计优于ls估计的条件；然后运用统计方法对这些条件的成立进行了检验，从假设检验的角度解决了有偏估计与ls估计之间的选择问题。