نتایج جستجو برای: gompertz logistic

تعداد نتایج: 105063  

Journal: :Waste and Biomass Valorization 2022

Abstract Biochemical methane potential (BMP) tests are the most reliable method for direct evaluation of yield from a specific feedstock in anaerobic digestion. However, these time-consuming (about 1 month) and quite expensive (need no less than two or three replicates). This study evaluates accuracy “first-order kinetic”, “logistic” “Gompertz” models predicting BMP values, calibrating models’ ...

Journal: :Poultry science 2003
H Darmani Kuhi E Kebreab S Lopez J France

A total of 86 profiles from meat and egg strains of chickens (male and female) were used in this study. Different flexible growth functions were evaluated with regard to their ability to describe the relationship between live weight and age and were compared with the Gompertz and logistic equations, which have a fixed point of inflection. Six growth functions were used: Gompertz, logistic, Lope...

Journal: :Advanced Engineering Informatics 2008
Charles V. Trappey Hsin-Ying Wu

1474-0346/$ see front matter 2008 Elsevier Ltd. A doi:10.1016/j.aei.2008.05.007 * Corresponding author. Tel.: +886 3 5727686; fax: E-mail addresses: trappey@faculty.nctu.edu.tw (C.V nctu.edu.tw (H.-Y. Wu). Many successful technology forecasting models have been developed but few researchers have explored a model that can best predict short product lifecycles. This research studies the forecast ...

Journal: :Journal of animal science 2006
N R Lambe E A Navajas G Simm L Bünger

This study compared the use of various models to describe growth in lambs of 2 contrasting breeds from birth to slaughter. Live BW records (n = 7559) from 240 Texel and 231 Scottish Blackface (SBF) lambs weighed at 2-wk intervals were modeled. Biologically relevant variables were estimated for each lamb from modified versions of the logistic, Gompertz, Richards, and exponential models, and from...

احتشام قرابی, شهاب, الهی ترشیزی, مهدی, حسین پور مشهدی, مجتبی,

The purpose of this study was to describe growth curve in Baluchi sheep by application of nonlinear growth models. The weight records of 1228 and 676 Baluchi male and female lambs for birth weight, one-month, two-month, three-month, four-month, six-month, nine-month and one year of age were studied. These data had been collected by Baluchi Sheep Breeding Center in Mashhad (Abbas Abad) during 20...

2013
Pierre Nguimkeu

This paper proposes a simple model selection test between the Gompertz and the Logistic growth models based on parameter significance testing in a comprehensive linear regression. Simulations studies are provided to show the accuracy of the method. Two real-data examples are also provided to illustrate the implementation of the proposed method in practice.

Journal: :Scientometrics 2021

Abstract Scientific topics vary in popularity over time. In this paper, we model the life cycles of 200 trending by fitting Logistic and Gompertz models to their frequency time published abstracts. Unlike other work, use are algorithmically extracted from large datasets abstracts covering computer science, particle physics, cancer research, mental health. We find that produces lower median erro...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید

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