نتایج جستجو برای: fractional prey
تعداد نتایج: 79838 فیلتر نتایج به سال:
Based on the recently introduced fractional Taylor’s formula, a fractional heat conduction constitutive equation is formulated by expanding the single-phase lag model using the fractional Taylor’s formula. Combining with the energy balance equation, the derived fractional heat conduction equation has been shown to be capable of modeling diffusion-to-Thermal wave behavior of heat propagation by ...
The interference of biological agents may cause behaviors such as interspecific predation, reducing their efficiencies. The interspecific predation of lacewing, Chrysoperla carnea (Steph.) and ladybeetle, Hippodamia variegata (Goeze) was investigated in the presence and absence of prey, Aphis gossypii Glover under laboratory conditions. In the presence and absence of prey, the larvae of lacewin...
دراین پایان نامه اعمال شرط مرزی ورود وخروج به روشisphبا الگوریتم fractional step بررسی می شود و ایده ای ارائه می گردد که همه ی الزامات ورودی و خروجی جریان برای روش مبنا ذره ای sph در آن لحاظ می شود. ابتدا سعی می شود نحوه ی اعمال شرایط مرزی ورود/ خروج، برای جریان داخل یک لوله افقی توضیح داده شود ونتایج با حل تحلیلی صحت سنجی می شود. در ادامه از آن برای مدل کردن جریان بر روی پله وارون(backward-fac...
In this paper, the fractional partial differential equations are defined by modified Riemann-Liouville fractional derivative. With the help of fractional derivative and fractional complex transform, these equations can be converted into the nonlinear ordinary differential equations. By using solitay wave ansatz method, we find exact analytical solutions of the space-time fractional Zakharov Kuz...
This work presents the numerical performances of fractional kind food supply (FKFS) model. The kinds derivatives have been used to acquire accurate and realistic solutions FKFS FKFSM system contains three types, special predator L(x), top-predator M(x) prey populations N(x). different cases model are provided through stochastic procedures scaled conjugate gradient neural networks (SCGNNs). data...
We apply a new generalized Caputo operator to investigate the dynamical behaviour of non-integer food web model (FWM). This has three population species and is nonlinear. Three types are considered in this population: prey species, intermediate predators, top predators also divided into mature immature predators. calculated uniqueness existence solutions applying fixed-point hypothesis. Our stu...
The spatial distributions of predators and prey can be shaped by both intraand interspecific games. Most predator–prey studies, however, have ignored the interspecific game by focusing on how either predators or prey distribute themselves while holding the distribution of the other species fixed. We use genetic algorithms to examine how the distributional outcome of the game between predators a...
the purpose of this paper is to study the fuzzy fractional differentialequations. we prove that fuzzy fractional differential equation isequivalent to the fuzzy integral equation and then using this equivalenceexistence and uniqueness result is establish. fuzzy derivative is considerin the goetschel-voxman sense and fractional derivative is consider in theriemann liouville sense. at the end, we...
using the riemann-liouville fractional differintegral operator, the lie theory is reformulated. the fractional poisson bracket over the fractional phase space as 3n state vector is defined to be the fractional lie derivative. its properties are outlined and proved. a theorem for the canonicity of the transformation using the exponential operator is proved. the conservation of its generator is p...
in this paper, we apply the local fractional adomian decomposition and variational iteration methods to obtain the analytic approximate solutions of fredholm integral equations of the second kind within local fractional derivative operators. the iteration procedure is based on local fractional derivative. the obtained results reveal that the proposed methods are very efficient and simple tools ...
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