Tree Taper Model Volume Equations: I. Bark Taper Equations for California Conifers
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چکیده
منابع مشابه
Simple, flexible, trigonometric taper equations
THOMAS, C. E., and PARKESOL, B. R. 1991. Simple, flexible, trigonometric taper equations. Can. J. For. Res. 21: 1132-1137. There have been numerous approaches to modeling stem form in recent decades. The majority have concentrated on the simpler coniferous bole form and have become increasingly complex mathematical expressions. Use of trigonometric equations provides a s imple expression of tap...
متن کاملCalibrating fixed- and mixed-effects taper equations
Accurate and affordable measurements of upper-stem diameters are now possible thanks to recent advances in laser technology. Measurement of the midpoint upper-stem diameter can be employed to improve the accuracy of diameter predictions along the tree bole. Felled-tree data from a loblolly pine (Pinus taeda L.) plantation was used to evaluate two approaches: (1) calibrating a segmented taper eq...
متن کاملEstimating upper stem diameters and volume of Douglas-fir and Western hemlock trees in the Pacific northwest
Background: Volume and taper equations are essential for obtaining estimates of total and merchantable stem volume. Taper functions provide advantages to merchantable volume equations because they estimate diameter inside or outside bark at specific heights on the stem, enabling the estimation of total and merchantable stem volume, volume of individual logs, and a height at a given diameter. Me...
متن کاملParsimonious and Completely Compatible Taper, Total, and Merchantable Volume Models
A parsimonious and compatible system of taper, total, and merchantable volume equations sharing a common vector of three parameter estimates was derived from Clark and Saucier’s (1990) volume ratio model. Clark and Saucier’s model expresses volume inside bark as a function of outside bark diameter and is itself not compatible with the derived taper equation. To ensure compatibility, models were...
متن کاملOptimal broadband antireflective taper.
We have solved the optimal taper design for minimizing reflection over a broad frequency band for a given tapered length. We believe this work will lead to significant improvement in developing broadband antireflective devices in many areas.
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ژورنال
عنوان ژورنال: Hilgardia
سال: 1995
ISSN: 0073-2230
DOI: 10.3733/hilg.v62n02p014