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Complexity Analysis and Computation of the Optimal Harvesting for One-Species Population Resources
2007/8/7
The exploitation of renewable resources creates many complex problems for culture, ecology and economics as well. Ascertaining the essentials behind the complex problems is very important. In this pap...
In this paper, we derive a lattice model for a single species on infinitepatches of one-dimensional space with that the maturation could occur at any age. Theformulation involves a distribution of pos...
In this paper, the asymptotic behavior of three types ofpopulation models with delays and diffusion is studied. The firstrepresents one species growth in the patch ${\it\Omega}$ andperiodic environmen...
TIME-DEPENDENT COOPERATIVE SYSTEM OF POPULATION GROWTH
Cooperative system globally attractive
2007/8/7
In this paper, we consider the asymptotic behavior of a general time-dependent cooperative system. Sufficient condition is obtained for the existence of a globally attractive positive periodic solutio...
THE OPTIMAL CONTROL OF AGE-DEPENDENT POPULATION DYNAMICS BASED ON PARITY PROGRESSION
Optimal birth number control age-struct
2007/8/7
The optimal control problem for an age-dependent population dynamics basedon parity ratio progression is considered. The functional analytie approach of Dubovitskiiand Milyutin is adopted in the inves...
CRITICAL BIRTH ORDER RATIO CONTROL AND ATTAINABLE SET OF A DISCRETE AGE-DEPENDENT PARITY PSOGRESSION POPULATION SYSTEM
Population dynamics parity progression m
2007/8/7
A colltrolled age-structured difference equation model of population dynamics based on parity progression is discussed. The distribution of the control strategies which guarantee the population to app...
In this paper, we consider a closed Population system with n-intersections. It is proved that there exists a critical fertility distribution which leads to the stable population state. The existence a...
In recent years, population growth models with spatial diffusion have been extensively studied by many authors (for example, see [1-5]). In this paper, a population growth model is considered with a d...
PERIODIC SOLUTIONS AND PERIOD-SIMILARITY OF A GROWTH MODEL WITH AGE-STRUCTURED POPULATION
Age-structured population periodic solut
2007/8/7
The present paper deals with the periodic behaviours of an age-structured population model. The period-similarity is proposed, which reveals a certain similar structure between those population models...
A nonlinear age-dependent population model, which allows for consideration of the effects of crowding and resource limitation, is presented. The basic properties of solution, such as existence, positi...