Norway spruce bark thickness models based on log midspan diameter for use in mechanized forest harvesting in Czechia

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F19%3A80613" target="_blank" >RIV/60460709:41320/19:80613 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/19:43918187

Výsledek na webu

<a href="https://www.tandfonline.com/doi/full/10.1080/02827581.2019.1650952" target="_blank" >https://www.tandfonline.com/doi/full/10.1080/02827581.2019.1650952</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/02827581.2019.1650952" target="_blank" >10.1080/02827581.2019.1650952</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Norway spruce bark thickness models based on log midspan diameter for use in mechanized forest harvesting in Czechia

Popis výsledku v původním jazyce

Foresters need to estimate bark thickness accurately in order to know the merchantable timber volume. Therefore, we developed a precise model for double bark thickness estimation that can be used with harvesters. We fitted a line to data from the Czech standard for bark deductions of Norway spruce (Picea abies (L.) Karst.) based on over-bark midspan diameters. Our model provided smaller deviations from the currently used polynomial model than other methods of bark thickness estimation. Only the diameter class method provided similar results. The mean absolute error (MAE) of the double bark thickness was 0,37 mm for our model or 0,48 mm for the diameter class method. The root means square error (RMSE) in this dataset was 0,43 mm or 0,56 mm respectively. We tested the deviations from the polynomial model on data from 22,442 spruce logs, gathered during forest harvesting in Czechia. Our model provided MAE of 0,34 mm and RMSE of 0,40 mm. Diameter class method provided MAE of 0,38 mm and RMSE of 0,43 mm.

Název v anglickém jazyce

Norway spruce bark thickness models based on log midspan diameter for use in mechanized forest harvesting in Czechia

Popis výsledku anglicky

Foresters need to estimate bark thickness accurately in order to know the merchantable timber volume. Therefore, we developed a precise model for double bark thickness estimation that can be used with harvesters. We fitted a line to data from the Czech standard for bark deductions of Norway spruce (Picea abies (L.) Karst.) based on over-bark midspan diameters. Our model provided smaller deviations from the currently used polynomial model than other methods of bark thickness estimation. Only the diameter class method provided similar results. The mean absolute error (MAE) of the double bark thickness was 0,37 mm for our model or 0,48 mm for the diameter class method. The root means square error (RMSE) in this dataset was 0,43 mm or 0,56 mm respectively. We tested the deviations from the polynomial model on data from 22,442 spruce logs, gathered during forest harvesting in Czechia. Our model provided MAE of 0,34 mm and RMSE of 0,40 mm. Diameter class method provided MAE of 0,38 mm and RMSE of 0,43 mm.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40102 - Forestry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

SCANDINAVIAN JOURNAL OF FOREST RESEARCH

ISSN

0282-7581

e-ISSN

—

Svazek periodika

34

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

617-626

Kód UT WoS článku

000480142500001

EID výsledku v databázi Scopus

2-s2.0-85070473449