Results 11 to 20 of about 2,904 (185)

Extended von Bertalanffy Equation in Solow Growth Modelling

Algorithms
The aim of this work is to model the growth of an economic system and, in particular, the evolution of capital accumulation over time, analysing the feasibility of a closed-form solution to the initial value problem that governs the capital-per-capita ...
Antonio E. Bargellini, Daniele Ritelli, Giulia Spaletta   +2 more
doaj   +2 more sources

Best fitting tumor growth models of the von Bertalanffy-PütterType. [PDF]

BMC Cancer, 2019
Longitudinal studies of tumor volume have used certain named mathematical growth models. The Bertalanffy-Pütter differential equation unifies them: It uses five parameters, amongst them two exponents related to tumor metabolism and morphology. Each exponent-pair defines a unique three-parameter model of the Bertalanffy-Pütter type, and the above ...
Kühleitner M, Brunner N, Nowak WG, Renner-Martin K, Scheicher K.   +4 more
europepmc   +5 more sources

Análisis multimodelo del crecimiento de pseudoplatystoma orinocoense en la cuenca media del Orinoco, Venezuela

Biotecnología en el Sector Agropecuario y Agroindustrial, 2019
Entre las especies de mayor importancia comercial y pesquera de la pesca artesanal del rio Orinoco se encuentra Pseudopatystoma orinocoense, donde el desembarco de peces pequeños motivó la realización de estudios anteriores de evaluación de su población,
Angel Gonzáles, Jeremy Mendoza, Freddy Arocha, Arístide Marquez   +3 more
doaj   +1 more source

The multiplicative heteroscedastic Von Bertalanffy model

Brazilian Journal of Probability and Statistics, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Diniz, Carlos Alberto Ribeiro, Louzada-Neto, Francisco, Morita, Lia Hanna Martins   +2 more
openaire   +3 more sources

Analysis of Germination Curves of Cinchona officinalis L. (Rubiaceae) Using Sigmoidal Mathematical Models

International Journal of Agronomy, 2023
Seed germination is the fundamental phenomenon that determines the successful growth and development of each plant species, even more so in Cinchona officinalis, which is a forest species that stands out for its medicinal importance.
Lenin Quiñones-Huatangari, Annick Estefany Huaccha-Castillo, Franklin Hitler Fernandez-Zarate, Eli Morales-Rojas, Jenny Del Milagro Marrufo-Jiménez, Leslie Lizbeth Mejía-Córdova   +5 more
doaj   +1 more source

Classical nonlinear models to describe the growth curve for Murrah buffalo breed Modelos não-lineares clássicos para descrever a curva de crescimento de búfalos da raça Murrah

Ciência Rural, 2012
With the objective of to adjust nonlinear models for the growth curves for a buffaloes herd raised in floodable lands in Rio Grande do Sul state, monthly records measured from birth to two years-old of 64 males and 63 females born between 1982 and 1989 ...
Ronyere Olegário de Araújo, Cintia Righetti Marcondes, Maria Cecília Florisbal Damé, Analía del Valle Garnero, Ricardo José Gunski, Dionéia Magda Everling, Paulo Roberto Nogara Rorato   +6 more
doaj   +1 more source

Curvas de crescimento morfométrico de piracanjuba (Brycon orbignyanus) Morphometric growth curves of piracanjuba (Brycon orbignyanus)

Ciência e Agrotecnologia, 2009
Conduziu-se um experimento no setor de piscicultura da Universidade Federal de Lavras M.G., com o objetivo de estabelecer curvas de crescimento morfométrico em função do peso corporal para a piracanjuba (Brycon orbignyanus). Alevinos de piracanjuba foram
Juliana Sampaio Guedes Gomiero, Rilke Tadeu Fonseca de Freitas, Vander Bruno dos Santos, Fabyano Fonseca da Silva, Paulo Borges Rodrigues, Priscila Vieira Rosa Logato   +5 more
doaj   +1 more source

Growth and mortality of Sphoeroides testudineus (Tetraodontiformes: Tetraodontidae) in a tropical coastal lagoon in northwestern Yucatán Peninsula

Revista Mexicana de Biodiversidad, 2012
This study reports length-weight relationships and growth parameters for Sphoeorides testudineus from La Carbonera, a karstic tropical coastal lagoon on the northwestern coast of the Yucatan Peninsula, Mexico.
José Luis Bonilla-Gómez, Juani Tzeek-Tuz, Maribel Badillo, Xavier Chiappa-Carrara   +3 more
doaj   +1 more source

A Growth Functional Equation

Revista de Ciencias, 1996
We state a growth functional equation related with the Von Bertalanffy physiological differential ...
Carlos Julio Rodríguez B., Jorge Rodríguez B.   +1 more
doaj   +1 more source

Optimal and near-optimal exponent-pairs for the Bertalanffy-Pütter growth model [PDF]

PeerJ, 2018
The Bertalanffy–Pütter growth model describes mass m at age t by means of the differential equation dm/dt = p * ma − q * mb. The special case using the von Bertalanffy exponent-pair a = 2/3 and b = 1 is most common (it corresponds to the von Bertalanffy ...
Katharina Renner-Martin, Norbert Brunner, Manfred Kühleitner, Werner-Georg Nowak, Klaus Scheicher   +4 more
doaj   +2 more sources