Encontrados 126 documentos, a visualizar página 1 de 13

Fractional order optimal control problems with free terminal time

We consider fractional order optimal control problems in which the dynamic control system involves integer and fractional order derivatives and the terminal time is free. Necessary conditions for a state/control/terminal- time triplet to be optimal are obtained. Situations with constraints present at the end time are also considered. Under appropriate assumptions, it is shown that the obtained necessary optimal...

Pituitary apoplexy: surgical or conservative management

Caracterização das doentes com cancro da mama no Hospital de Braga: utilização...

Rinossinusite Complicada por Abscesso Cerebral

Generalized transversality conditions in fractional calculus of variations

Problems of calculus of variations with variable endpoints cannot be solved without transversality conditions. Here, we establish such type of conditions for fractional variational problems with the Caputo derivative. We consider: the Bolza-type fractional variational problem, the fractional variational problem with a Lagrangian that may also depend on the unspecified end-point phi(b), where x = phi(t) is a giv...

An expansion formula with higher-order derivatives for fractional operators of ...

We obtain approximation formulas for fractional integrals and derivatives of Riemann-Liouville and Marchaud types with a variable fractional order. The approximations involve integer-order derivatives only. An estimation for the error is given. The efficiency of the approximation method is illustrated with examples. As applications, we show how the obtained results are useful to solve differential equations, an...

Influência no fluxo sanguíneo do ângulo da anastomose latero-terminal da pontag...

Custos do tratamento da doença arterial obstrutiva infra-poplítea (DAOIP) – aná...

Effect of somatotropin and IGF1 secretion on glucose metabolism: Diabetic ketoa...

Fractional variational problems depending on indefinite integrals

We obtain necessary optimality conditions for variational problems with a Lagrangian depending on a Caputo fractional derivative, a fractional and an indefinite integral. Main results give fractional Euler-Lagrange type equations and natural boundary conditions, which provide a generalization of the previous results found in the literature. Isoperimetric problems, problems with holonomic constraints and dependi...