Jose J A E M Martinez | UNIMEP (original) (raw)

Jose J A E M Martinez

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Papers by Jose J A E M Martinez

Research paper thumbnail of A trust region method for minimization of nonsmooth functions with linear constraints

We introduce a trust region algorithm for minimization of nonsmooth functions with linear constra... more We introduce a trust region algorithm for minimization of nonsmooth functions with linear constraints. At each iteration, the objective function is approximated by a model fuction that satis es a set of assumptions stated recently by Qi and Sun in the context of unconstrained nonsmooth optimization. The trust region iteration begins with the resolution of an \easy problem", as in recent works of Mart nez and Santos and Friedlander, Mart nez and Santos, for smooth constrained optimization. In practical implementations we use the innity norm for de ning the trust region, which ts well with the domain of the problem. We prove global convergence and report numerical experiments.

Research paper thumbnail of A Numerical Study on Large-Scale Nonlinear Solvers* 1

… & Mathematics with …, 1996

Research paper thumbnail of Density functional theory based screening of ternary alkali-transition metal borohydrides: A computational material design project

We present a computational screening study of ternary metal borohydrides for reversible hydrogen ... more We present a computational screening study of ternary metal borohydrides for reversible hydrogen storage based on density functional theory. We investigate the stability and decomposition of alloys containing 1 alkali metal atom, Li, Na, or K ͑M 1 ͒; and 1 alkali, alkaline earth or 3d / 4d transition metal atom ͑M 2 ͒ plus two to five ͑BH 4 ͒ − groups, i.e., M 1 M 2 ͑BH 4 ͒ 2-5 , using a number of model structures with trigonal, tetrahedral, octahedral, and free coordination of the metal borohydride complexes. Of the over 700 investigated structures, about 20 were predicted to form potentially stable alloys with promising decomposition energies. The M 1 ͑Al/ Mn/ Fe͒͑BH 4 ͒ 4 , ͑Li/ Na͒Zn͑BH 4 ͒ 3 , and ͑Na/ K͒͑Ni/ Co͒͑BH 4 ͒ 3 alloys are found to be the most promising, followed by selected M 1 ͑Nb/ Rh͒͑BH 4 ͒ 4 alloys.

Research paper thumbnail of Incidencia De Los Estilos De Aprendizaje en El Aprovechamiento Académico De Los Alumnos De Comunicación Utilizando El Ipod

Journal of Learning Styles, Oct 1, 2013

Research paper thumbnail of On optimal control theory in marine oil spill management: A Markovian decision approach

European Journal of Operational Research, 2012

â–º Development of a novel strategy of optimal control theory for oil spill management. â–º Formu... more â–º Development of a novel strategy of optimal control theory for oil spill management. â–º Formulation of sequential decision rules using MDP. â–º Application of optimal control theory to marine oil spill via MDP.

Research paper thumbnail of A trust region method for minimization of nonsmooth functions with linear constraints

We introduce a trust region algorithm for minimization of nonsmooth functions with linear constra... more We introduce a trust region algorithm for minimization of nonsmooth functions with linear constraints. At each iteration, the objective function is approximated by a model fuction that satis es a set of assumptions stated recently by Qi and Sun in the context of unconstrained nonsmooth optimization. The trust region iteration begins with the resolution of an \easy problem", as in recent works of Mart nez and Santos and Friedlander, Mart nez and Santos, for smooth constrained optimization. In practical implementations we use the innity norm for de ning the trust region, which ts well with the domain of the problem. We prove global convergence and report numerical experiments.

Research paper thumbnail of A Numerical Study on Large-Scale Nonlinear Solvers* 1

… & Mathematics with …, 1996

Research paper thumbnail of Density functional theory based screening of ternary alkali-transition metal borohydrides: A computational material design project

We present a computational screening study of ternary metal borohydrides for reversible hydrogen ... more We present a computational screening study of ternary metal borohydrides for reversible hydrogen storage based on density functional theory. We investigate the stability and decomposition of alloys containing 1 alkali metal atom, Li, Na, or K ͑M 1 ͒; and 1 alkali, alkaline earth or 3d / 4d transition metal atom ͑M 2 ͒ plus two to five ͑BH 4 ͒ − groups, i.e., M 1 M 2 ͑BH 4 ͒ 2-5 , using a number of model structures with trigonal, tetrahedral, octahedral, and free coordination of the metal borohydride complexes. Of the over 700 investigated structures, about 20 were predicted to form potentially stable alloys with promising decomposition energies. The M 1 ͑Al/ Mn/ Fe͒͑BH 4 ͒ 4 , ͑Li/ Na͒Zn͑BH 4 ͒ 3 , and ͑Na/ K͒͑Ni/ Co͒͑BH 4 ͒ 3 alloys are found to be the most promising, followed by selected M 1 ͑Nb/ Rh͒͑BH 4 ͒ 4 alloys.

Research paper thumbnail of Incidencia De Los Estilos De Aprendizaje en El Aprovechamiento Académico De Los Alumnos De Comunicación Utilizando El Ipod

Journal of Learning Styles, Oct 1, 2013

Research paper thumbnail of On optimal control theory in marine oil spill management: A Markovian decision approach

European Journal of Operational Research, 2012

â–º Development of a novel strategy of optimal control theory for oil spill management. â–º Formu... more â–º Development of a novel strategy of optimal control theory for oil spill management. â–º Formulation of sequential decision rules using MDP. â–º Application of optimal control theory to marine oil spill via MDP.

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