Non-linear age-time-population dependent stochastic population model
نویسندگان
چکیده
منابع مشابه
Non-linear Age-dependent Population Dynamics
where P( t ) is the total population at time t and 5 is the growth modulus. This law is clearly inapplicable to situations in which the population competes for resources (e.g., space and food), for in these situations 5 should depend on the size of the population: the larger the population, the slower should be its rate of growth. To overcome this deficiency in the Malthusian law, VERHULST [184...
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(/? is the birth modulus), that there is no diffusion through the boundary dQ of Q, that is: d A k(a, cc)u(t, a, x) doc = 0 (3) o 8*1 Jc where d/dr] is the normal derivative, and that the initial population is known: w(0, a, x) = u0(a, x). (4) A is the maximum life expectancy of the species. The initial boundary value problem (1)—(4) will be referred to as problem (I), namely (subscripts indica...
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In this paper a variational version of the Trotter-Kato theorem is applied to an innnitesimal generator A of a C 0-semigroup in a Hilbert space that is assumed to be the sum of two linear operators A and B deened on the intersection of their domains, where A ? !I is m-dissipative for some ! > 0 and B is the generator of an analytic semigroup associated with a bounded V-coercive sesquilinear for...
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ژورنال
عنوان ژورنال: Bangladesh Journal of Scientific Research
سال: 2012
ISSN: 2408-8447,0253-5432
DOI: 10.3329/bjsr.v25i1.13052