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An Approach for Optimizing Residual Diameter Class Distributions When Thinning Even-Aged Stands

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The determination of optimal residual diameter class distributions along with optimal timing of thinning and harvest is formulated as an unconstrained nonlinear program. Two structural characteristics of the problem are noted. A nonlinear programming algorithm is modified to take advantage of these characteristics. An example is used to illustrate the technique. The total number of variables within the formulation can be reduced to a small fraction of active variables. The ratio between active and total variables is approximately 0.3, or an approximate 70% reduction in problem size is experienced. The same amount of reduction would be expected in any similar formulation. Forest Sci 32:871-881.

Keywords: Dynamic optimization; Hooke and Jeeves method; forest economics; nonlinear programming

Document Type: Journal Article

Affiliations: Assistant Professor, North Carolina State University, Department of Forestry, Box 8002, Raleigh, NC 27695

Publication date: December 1, 1986

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