Results 21 to 30 of about 3,861,847 (314)

The study of comparative structure of Picea spp. and Abies spp. tree biomass on the territory of Eurasia by additive and conventional methods [PDF]

open access: yesСибирский лесной журнал, 2018
Forest biomass is a key ecosystem trait and an important component of the global carbon cycle. Biomass modelling is performed in terms of forest stands and sample trees.
V. A. Usoltsev   +3 more
doaj   +1 more source

Bias Correction in Logarithmic Regression and Comparison with Weighted Regression for Nonlinear Models [PDF]

open access: yes, 2011
Non-linear models with heteroscedasticity are commonly used in ecological and forestry modeling, and logarithmic regression and weighted regression are usually employed to estimate the parameters. Using the single-tree biomass data of three large samples,
Wei Sheng Zeng, Shou Zheng Tang
core   +1 more source

Volterra integral equations and fractional calculus: Do neighbouring solutions intersect? [PDF]

open access: yes, 2012
This is the author's PDF version of an article published in Journal of Integral Equations and Applications. The definitive version is available at rmmc.asu.edu/jie/jie.html.This journal article considers the question of whether or not the solutions to ...
Diethelm, Kai, Ford, Neville J.
core   +1 more source

Prediction Model of the Sound Speed of Seafloor Sediments on the Continental Shelf of the East China Sea Based on Empirical Equations

open access: yesJournal of Marine Science and Engineering, 2023
Based on the data of the acoustic and physical properties of seafloor sediments obtained on the continental shelf area of the East China Sea (ECS), prediction equations of the sediment sound speed based on single and dual parameters were established, and
Guangming Kan   +8 more
doaj   +1 more source

Efeito de diferentes níveis de energia e de programas de alimentação sobre o desempenho de frangos de corte abatidos tardiamente Effect of different metabolizable energy levels and feeding programs on performance in broilers lately slaughtered

open access: yesRevista Brasileira de Zootecnia, 2006
O experimento foi realizado com o objetivo de avaliar diferentes níveis de energia metabolizável e de programas de alimentação sobre o desempenho de frangos de corte no período de 42 a 57 dias de idade.
Karina Ferreira Duarte   +6 more
doaj   +1 more source

The errors of the regression equations.

open access: yes, 2020
The errors of the regression equations.
Xiuli Chen (384084)   +5 more
core   +1 more source

Morphometric indices of plants as a basis for determination of biomass yield of switch grass

open access: yesAgrology, 2020
Among the significant number of grain cereals used for the production of solid kinds of biofuels in the form of fuel pellets and briquettes as the acceptable raw material is biomass of switch grass, or “virgate millet”.
M. J. Gumentyk   +2 more
doaj   +1 more source

Maximum likelihood estimation of the parameters of a system of simultaneous regression equations [PDF]

open access: yes, 1988
Procedures for computing the full information maximum likelihood (FIML) estimates of the parameters of a system of simultaneous regression equations have been described by Koopmans, Rubin, and Leipnik, Chernoff and Divinsky, Brown, and Eisenpress ...
James Durbin, Durbin, J.
core   +1 more source

Application of Mathematical Models to Evaluate Serological Monitoring in Breeders and Commercial Laying Hens [PDF]

open access: yesBrazilian Journal of Poultry Science
Mathematical models based on regression equations are an important tool for the interpretation of data generated by the serological monitoring of poultry flocks.
LGB Almeida   +8 more
doaj   +1 more source

Stepwise multiple linear regression equations.

open access: yes, 2015
Stepwise multiple linear regression equations.
Taolin Zhang (711645)   +4 more
core   +1 more source

Home - About - Disclaimer - Privacy