Browsing by Author "Ramírez Cabrera, Héctor"
Now showing items 1-16 of 16
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Cruz Rivera, Erica; Ramírez Cabrera, Héctor; Vasilieva, Olga (Rocky Mountain Mathematics Consortium, 2019)Biologic characteristics of schooling fish species explain why the rates of harvesting in pelagic fisheries are not proportional to the existent stock size and may exhibit no variation between the periods of fish abundance ...
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López, Julio; López, Rubén; Ramírez Cabrera, Héctor (PERGAMON-ELSEVIER SCIENCE LTD, 2012-02)In this paper we introduce a new class, called F, of linear transformations defined from the space of real n x n symmetric matrices into itself. Within this new class, we show the equivalence between Q- and Q(b)-transformations. ...
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Ramírez Cabrera, Héctor; Seeger, Alberto; Sossa Aguirre, David (2013)This paper establishes a commutation result for variational problems involving spectral sets and spectral functions. The discussion takes places in the context of a general Euclidean Jordan algebra.
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Correa, Rafael; Ramírez Cabrera, Héctor (SIAM PUBLICATIONS, 2004)In this paper we propose a global algorithm for solving nonlinear semidefinite programming problems. This algorithm, inspired by the classic SQP (sequentially quadratic programming) method, modifies the S-SDP (sequentially ...
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Mordukhovich, Boris S.; Outrata, Jiri V.; Ramírez Cabrera, Héctor (Springer, 2015)The paper concerns parameterized equilibria governed by generalized equations whose multivalued parts are modeled via regular normals to nonconvex conic constraints. Our main goal is to derive a precise pointwise second-order ...
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Haddon, Antoine; Harmand, Jérôme; Ramírez Cabrera, Héctor; Rapaport, Alain (Elsevier, 2017)In this work, we revisit a problem of optimal control for the maximisation of biogas production in a continuous bioreactor, for which the analytical determination of the optimal synthesis is an open problem. We consider ...
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Gajardo, Pedro; Peña-Torres, Julio; Ramírez Cabrera, Héctor (WILEY-BLACKWELL, 2011-05)P>In the case of small pelagic fish, it seems reasonable to consider harvest functions depending nonlinearly on fishing effort and fish stock. Indeed, empirical evidence about these fish species suggests that marginal catch ...
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López, Julio; López, Rubén; Ramírez Cabrera, Héctor (Springer, 2013)This paper is devoted to the study of the symmetric cone linear complementarity problem (SCLCP). Specifically, our aim is to characterize the class of linear transformations for which the SCLCP has always a nonempty and ...
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Gajardo, P.; Ramírez Cabrera, Héctor; Rapaport, A. (SIAM PUBLICATIONS, 2008)We consider the optimal control problem of feeding in minimal time a tank where several species compete for a single resource, with the objective being to reach a given level of the resource. We allow controls to be ...
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Ramírez Cabrera, Héctor; Sossa, David (Springer, 2017)This paper is devoted to the study of optimal solutions of symmetric coneprograms by means of the asymptotic behavior of central paths with respect to a broadclass of barrier functions. This class is, for instance, larger ...
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Auslender, Alfred; Ramírez Cabrera, Héctor (PHYSICA-VERLAG GMBH & CO, 2006-05)In this paper we present penalty and barrier methods for solving general convex semidefinite programming problems. More precisely, the constraint set is described by a convex operator that takes its values in the cone of ...
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Bonnans, J. Frédéric; Ramírez Cabrera, Héctor (SPRINGER, 2005-11)We discuss first and second order optimality conditions for nonlinear second-order cone programming problems, and their relation with semidefinite programming problems. For doing this we extend in an abstract setting the ...
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Second-order variational analysis in conic programming with applications tooptimality and stability Mordukhovich, Boris S.; Outrata, Jiri V.; Ramírez Cabrera, Héctor (SIAM Publications, 2015)This paper is devoted to the study of a broad class of problems in conic programming modeled via parameter-dependent generalized equations. In this framework we develop a secondorder generalized differential approach of ...
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Bosch, Paul; López, Julio; Ramírez Cabrera, Héctor; Robotham, Hugo (Elsevier, 2013)In this work we apply multi-class support vector machines (SVMs) and a multi-class stochastic SVM formulation to the classification of fish schools of three species: anchovy, common sardine, and Jack Mackerel, and we ...
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Gajardo, Pedro; Ramírez Cabrera, Héctor; Rodríguez, Julio C. (Springer, 2014)This paper analyzes feeding strategies in a sequential batch reactor (SBR) with the objective of reaching a given (low) substrate level as quickly as possible for a given volume of water. Inside the SBR, several species ...
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Lara, Michel de; Gajardo, Pedro; Ramírez Cabrera, Héctor (Elsevier, 2011)This paper deals with the control of discrete-time dynamical, monotone both in the state and in the control, in the presence of state and control monotone constraints. A state x is said to belong to the viability kernel ...