母体参数加权优化估计及信息量拓展方法  

ESTIMATION OF WEIGHTED OPTIMIZATION FOR PARENT PARAMETERS AND THE METHOD OF EXPANDING INFORMATION CAPACITY

作　　者：佟晓君[1] 陈海彬[2] 马群[1] 解咏平[3] 

机构地区：[1]河北理工大学地震工程研究中心,唐山063009 [2]北京航空航天大学小样本技术研究中心,北京100083 [3]石家庄经济学院工程学院,石家庄050031

出　　处：《机械强度》2008年第4期617-622,共6页Journal of Mechanical Strength

摘　　要：给出估计母体参数的加权优化估计方法,该方法得到的参数估计量不仅具有最佳无偏的性质,而且能充分利用与当前样本有共性信息的其他样本,有效拓展当前样本空间,扩大信息量,在当前样本量较小情况下可以得到较高精度的参数估计量。与传统方法相比,利用文中方法得到估计量具有样本量大、精度高的特点。将文中方法运用到现场混凝土强度无损检测中,有效解决在现场数据较少的情况下现场测强曲线的建立问题。The estimation of weighted optimization for parent parameters is put forward. The parameter estimator obtained from the present method not only possesses the best unbiased property, but also makes full use of other samples which has the generality information with current sample. It effectively expands the space sample of present data, and can enlarge the information. The high accuracy parameter estimator is got by the method in the case of less current sample size. Compared with the traditional method, the estimator obtained by this method has the characteristics of large samples and high accuracy. This method is used in the nondestructive test of in-site concrete strength, and then the question of establishing in-site strength curve is resolved effectively in the less present data.

关 键 词：加权优化 信息拓展 母体参数 现场测强曲线 

分 类 号：TU528.07[建筑科学—建筑技术科学]