simbase | R Documentation |
Predefined simbases in WoodSimulatR
ws_t ws_t_tr ws_t_te ws_t_logf ws_t_tr_logf ws_t_te_logf ws_be ws_be_tr ws_be_te ws_be_logf ws_be_tr_logf ws_be_te_logf
For statistical simulation of datasets in WoodSimulatR
, one
needs a simbase_covar
object. WoodSimulatR
contains a
set of such predefined simbases for Norway spruce (Picea abies) grown
in Austria.
The names of the simbases follow the following schema – the different parts are separated by "_":
"ws" – abbreviation of "WoodSimulatR simbase"
loadtype – can either be "t" for material tested in tension, or "be" for material tested in bending
subsample – empty for the full dataset, "tr" for the part of the dataset that was used for training, "te" for the part that was used for testing. The latter two can be used to more closely simulate independent training and test samples
transformation – empty for no transformation, "logf" if the strength
has been log-transformed prior to calculation of the simbase – see also
the argument transforms
in simbase_covar
.
The simbases contain the basis for simulating the following variables:
Bending or tension strength, in N/mm².
Static modulus of elasticity in bending or tension, in N/mm².
Density of a small clear sample, in kg/m³.
Dynamic modulus of elasticity of the timber after drying to a moisture content of about 12%, in N/mm².
Dynamic modulus of elasticity of the timber in the green state, with moisture contents mostly above fibre saturation point, in N/mm².
An "indicating property" (IP) for density, established by measuring the weight of each board and dividing by its volume, in kg/m³.
An "indicating property" (IP) for strength, established by
linear regression on E_dyn
, ip_rho
and a knot parameter
called "total knot area ratio" (tKAR), in N/mm².
The simbases were created based on data from the research project SiOSiP of Holzforschung Austria. "SiOSiP" is short for "simulation-based optimization of sawn timber production" and ran from 2014 to 2017.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.