Search Results - "Meng, Shawn X"

Improved Calibration of Nonlinear Mixed-Effects Models Demonstrated on a Height Growth Function by Meng, Shawn X, Huang, Shongming

“…The calibration of a nonlinear mixed-effects model is of critical importance in making local predictions. In previous applications, simplified equations were…”
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Nonlinear mixed-effects modeling of variable-exponent taper equations for lodgepole pine in Alberta, Canada by Yang, Yuqing, Huang, Shongming, Trincado, Guillermo, Meng, Shawn X

“…Four variable-exponent taper equations and their modified forms were evaluated for lodgepole pine (Pinus contorta var. latifolia Engelm.) trees in Alberta,…”
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Assessing the impacts of species composition, top height and density on individual tree height prediction of quaking aspen in boreal mixedwoods by Huang, Shongming, Wiens, Douglas P., Yang, Yuqing, Meng, Shawn X., Vanderschaaf, Curtis L.

“…In this study we developed an individual tree height prediction model for quaking aspen ( Populus tremuloides Michx.) grown in boreal mixedwood forests in…”
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Wind speed and crown class influence the height–diameter relationship of lodgepole pine: Nonlinear mixed effects modeling by Meng, Shawn X., Huang, Shongming, Lieffers, Victor J., Nunifu, Thompson, Yang, Yuqing

“…Wind-induced mechanical perturbation is one of the mechanisms determining the height–diameter relationship of trees, but its effects have largely been…”
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Reducing stem bending increases the height growth of tall pines by Meng, Shawn X, Lieffers, Victor J, Reid, Douglas E.B, Rudnicki, Mark, Silins, Uldis, Jin, Ming

“…The hypothesis was tested that upper limits to height growth in trees are the result of the increasing bending moment of trees as they grow in height. The…”
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Preventing crown collisions increases the crown cover and leaf area of maturing lodgepole pine by Meng, Shawn X, Rudnicki, Mark, Lieffers, Victor J, Reid, Douglas E.B, Silins, Uldis

“…1 Crown collisions induced by tree sway are hypothesized to reduce crown closure and leaf area in maturing cold temperate forests. These declines are thought…”
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Accounting for serial correlation and its impact on forecasting ability of a fixed- and mixed-effects basal area model: a case study by Meng, Shawn X., Huang, Shongming, Vanderschaaf, Curtis L., Yang, Yuqing, Trincado, Guillermo

“…Successfully accounting for serial correlations has always been a vital part of growth and yield modeling when using repeated measurement data. In this case…”
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Modeling crown volume of lodgepole pine based upon the uniform stress theory by Meng, Shawn X., Lieffers, Victor J., Huang, Shongming

“…A new model was proposed based on the uniform stress theory to predict crown volume of lodgepole pine ( Pinus contorta var. latifolia Engelm.). Uniform stress…”
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Development of a tree-specific stem profile model for white spruce: a nonlinear mixed model approach with a generalized covariance structure by Yang, Yuqing, Huang, Shongming, Meng, Shawn X.

“…A variable-exponent stem profile model was developed for white spruce (Picea glauca (Moench) Voss) trees in Alberta using a nonlinear mixed model approach…”
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Modelling the change in aspen species composition in boreal mixedwoods by Meng, Shawn X., Huang, Shongming, Lieffers, Victor J., Yang, Yuqing

“…The dynamics of aspen (Populus tremuloides Michx.) species composition (SC, defined as the ratio of aspen basal area to total stand basal area) in boreal…”
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