In this paper, we study the dynamics of a discrete fractional-order logistic growth model with infectious disease. We obtain by applying piecewise constant arguments to model. This contains three fixed points namely origin point, disease-free and endemic point. confirm that point is always exists unstable, conditionally stable, stable. also investigate existence forward, period-doubling, Neimar...

the logistic regression (lr) method, as an empirical estimation method, was used to model urban growth in gorgan city between the years 1987-2001. three groups of variables including social-economic, land use and biophysical variables were used. similarity among variables is probable. to remove the correlated variables, covariance was calculated and distance to administrative, sporting centers ...

This study compared the use of five different models to describe the growth from birth to 20 weeks of age of kids from both genders of nondescript goats. Fifty nine (59) nondescript kids were weighed weekly at the university of Maiduguri livestock teaching and research farm, Nigeria and the live weights were modeled. Biologically relevant variables were estimated for each kid from the Logistic,...