نتایج جستجو برای: keywords population growth

تعداد نتایج: 3272279  

Journal: :مجله پژوهش های اکوفیزیولوژی گیاهان زراعی 0

nilofar rahbar, hossein ali asadi gharneh* department of horticulture, isfahan (khorasgan) branch, islamic azad university, isfahan, iran *corresponding author email: [email protected] received: 3 may 2015                                                                          accepted: 14 june 2015 abstract fertilizer management is an important factor in successful cultivation of pharmaceu...

2012
Ravindra Reddy

This paper studies the effect of time delay on stability of mutualism population model with limited resources for both species. First, the stability of the model without time delay is analyzed. The model is then improved by considering a time delay in the mechanism of the growth rate of the population. We analyze the effect of time delay on the stability of the stable equilibrium point. Result ...

2012
Ravindra Reddy

This paper studies the effect of time delay on stability of mutualism population model with limited resources for both species. First, the stability of the model without time delay is analyzed. The model is then improved by considering a time delay in the mechanism of the growth rate of the population. We analyze the effect of time delay on the stability of the stable equilibrium point. Result ...

Journal: :Nature 1985

Journal: :TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) 2008

Journal: :Communications on Applied Electronics 2015

2017
John M Fryxell Ray Hilborn Carling Bieg Katrine Turgeon Amanda Caskenette Kevin S McCann

There is growing awareness of the need for fishery management policies that are robust to changing environmental, social, and economic pressures. Here we use conventional bioeconomic theory to demonstrate that inherent biological constraints combined with nonlinear supply-demand relationships can generate threshold effects due to harvesting. As a result, increases in overall demand due to human...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده مدیریت و اقتصاد 1391

abstract nowadays, industries cannot play a crucial role in national and international competitions. the tourism industry is no exception. tourism industry development as the most important economic sector and income generation is one of the key challenges of economic development in the world. therefore, countries were successful that take advantage of the capabilities of tourism sector using ...

Journal: :Proceedings of the AAAI Conference on Artificial Intelligence 2020

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