数量化理论(Ⅰ)与专家评分多元回归方法在荒漠地区生物量估测上的比较  

A COMPARISON OF QUANTIFICATION THEORY (i) AND MULTIVARIATE REGRESSION METHOD OF EXPERTREMARK IN THE BIOMASS ESTIMATION

作　　者：于九如[1] 韦少敏[1] 朱灵益[1] 

机构地区：[1]天津大学管理工程系,中国林业科学研究院林业研究所

出　　处：《林业科学》1997年第6期481-487,共7页Scientia Silvae Sinicae

摘　　要：本文对数量化理论（Ｉ）中的量化过程进行了改进，采用专家评分，在如下模型中当第ｉ个样本中第ｊ个项目的第ｊ个项目发生时，令ｊ，：０（，１ＡＯ是第ｊ个项目的第ｋ个类目的权重或贡献大小，由专家评分给出。通过实际验证，改进后的模型使预测精度有很大提高。The quantitative process of the quantitative theory (I) has been improved and the method of expert evaluation mark has been adopted in this paper. As we know, in the quantitative process: as category k of item j emerges in sample i, Otherwise. where n is sample number, m refers to item numbest and r represents category number of item j. Now, for the improved quantitative process, assume where β,(j,k) can be comprehended the weight or contribution of category k of item j and given by the expert evaluation mark. Through verification of actual model, the forecasting precision of improved quantitative theory (I) model is obviously enhanced.

关 键 词：数量化过程 数量化理论 模型 专家评分 生物量 

分 类 号：S71[农业科学—林学] S718.556