Title of article :
Using auxiliary information to estimate stand tables
Author/Authors :
Green، Edwin J. نويسنده , , Clutter، Michael نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2000
Abstract :
The problem of estimating stand tables in stands with few sample points is considered. The usual point-sampling estimate of trees per hectare by diameter class is examined, along with two alternative estimators: a precision-weighted composite estimator and a pseudo-Bayes estimator. A large-scale forest inventory is simulated, and stand tables are estimated for each stand with each of the three estimators. Both the composite and pseudo-Bayes estimator appear superior (in terms of mean absolute error and mean squared error) to the usual estimator. The pseudo-Bayes estimator appears to perform the best (with an 80% reduction in mean squared error). This estimator also is easier to use than the composite estimator because it does not require within diameter class variance estimates.
Keywords :
Delamination , hoop tension , cracking , iteration , hoop bending moment , radial reinforcement , reinforced con-crete , post-tensioned concrete
Journal title :
CANADIAN JOURNAL OF FOREST RESEARCH
Journal title :
CANADIAN JOURNAL OF FOREST RESEARCH