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Julio Cesar Lopez Luis

Profesor e investigador

Universidad Diego Portales

Santiago, Chile

conic optimization, interior-point algorithm, proximal-type algorithms, machine learning, pattern recognition.

Ingeniería Matemática, Mención Modelación Matemátia, UNIVERSIDAD DE CHILE. Chile, 2009
Ciencias, mención Matemáticas, Universidad Nacional de Trujillo. Chile, 2003
Licenciado en Matetmáticas, Universidad Nacional de Trujillo. Chile, 2001

Profesor Part Time

UNIVERSIDAD DE CHILE

Ciencias Físicas y Matemáticas

Santiago, Chile

2008 - 2012
Investigador Full Time

UNIVERSIDAD TECNICA FEDERICO SANTA MARIA

Santiago, Chile

2011 - 2012
Profesor Asociado Full Time

UNIVERSIDAD DIEGO PORTALES

Ingeniería y Ciencias

Santiago, Chile

2012 - At present

Profesor e Investigador Full Time

Universidad Diego Portales

Santiago, Chile

2012 - At present

*) Pedro Avila, Mathematical Engineer, Universidad de Santiago de Chile, 2018: “Formulaciones SVM con incertidumbre aplicados a las clasificación de datos desbalanceados”.

The Charles Broyden Prize for the Best Paper

Journal Optimization Methods and Software i

Reino Unido, 2011

The Charles Broyden Prize for the Best Paper published in Optimization Methods and Software in 2010.


Out-of-time cross-validation strategies for classification in the presence of dataset shift Maldonado, Sebastian; Lopez, Julio; Iturriaga, Andres Article ISI APPLIED INTELLIGENCE (2022)
Simultaneous model construction and noise reduction for hierarchical time series via Support Vector Regression Pablo Karmy, Juan; Lopez, Julio; Maldonado, Sebastian Article ISI KNOWLEDGE-BASED SYSTEMS (2021)
Time-weighted fuzzy support vector machines for classification in changing environments Maldonado, Sebastián; Lopez, Julio; Vairetti, Carla Article WOS core collection ISI INFORMATION SCIENCES (2021)
Profit-based churn prediction based on Minimax Probability Machines Maldonado, Sebastián; López, Julio; Vairetti, Carla Article ISI SCOPUS EUROPEAN JOURNAL OF OPERATIONAL RESEARCH (2020)
Simultaneous Feature Selection and Heterogeneity Control for SVM Classification: An application on mental workload assessment Maldonado, Sebastián; López, Julio; Jiménez-Molina, Ángel; Lira, Hernán Article WOS core collection ISI EXPERT SYSTEMS WITH APPLICATIONS (2020)
A feasible direction algorithm for nonlinear second-order cone programs Canelas, A; Carrasco, M; Lopez, J Article ISI OPTIMIZATION METHODS & SOFTWARE (2019)
A new method for reliability analysis and reliability-based design optimization Canelas A.; Carrasco M.; LÃ³pez J. Article ISI SCOPUS STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION (2019)
An alternative SMOTE oversampling strategy for high-dimensional datasets Maldonado, S; Lopez, J; Vairetti, C Article ISI SCOPUS APPLIED SOFT COMPUTING (2019)
Epsilon-nonparallel support vector regression Carrasco, Miguel; López, Julio; Maldonado, Sebastián Article ISI SCOPUS APPLIED INTELLIGENCE (2019)
Profit-based credit scoring based on robust optimization and feature selection López, Julio; Maldonado, Sebastián Article ISI SCOPUS INFORMATION SCIENCES (2019)
Regularized minimax probability machine Maldonado, Sebastián; Carrasco, Miguel; López, Julio Article ISI SCOPUS KNOWLEDGE-BASED SYSTEMS (2019)
Robust nonparallel support vector machines via second-order cone programming López, Julio; Maldonado, Sebastián; Carrasco, Miguel Article ISI SCOPUS NEUROCOMPUTING (2019)
Dealing with high-dimensional class-imbalanced datasets: Embedded feature selection for SVM classification Maldonado, Sebastián; López, Julio Article ISI SCOPUS APPLIED SOFT COMPUTING (2018)
Double regularization methods for robust feature selection and SVM classification via DC programming López, Julio; Maldonado, Sebastián; Carrasco, Miguel Article WOS Core Collection ISI INFORMATION SCIENCES (2018)
Double regularization methods for robust feature selection and SVM classification via DC programming López, Julio; Maldonado, Sebastián; Carrasco, Miguel Article ISI SCOPUS INFORMATION SCIENCES (2018)
Ellipsoidal Support Vector Regression based on Second-order Cone Programming Maldonado, Sebastián; López, Julio Article NEUROCOMPUTING (2018)
Mining EEG with SVM for Understanding Cognitive Underpinnings of Math Problem Solving Strategies Bosch, Paul; Herrera, Mauricio; López, Julio; Maldonado, Sebastián Article Behavioural Neurology (2018)
Redefining nearest neighbor classification in high-dimensional settings López, Julio; Maldonado, Sebastián Article PATTERN RECOGNITION LETTERS (2018)
Robust twin support vector regression via second-order cone programming López, Julio; Maldonado, Sebastián Article ISI SCOPUS KNOWLEDGE-BASED SYSTEMS (2018)
A robust formulation for twin multiclass support vector machine López J., Maldonado S. Article Applied Intelligence (2017)
Application of the sequential parametric convex approximation method to the design of robust trusses Canelas, Alfredo; Carrasco, Miguel; López, Julio Article Journal of Global Optimization (2017)
Construction of proximal distances over symmetric cones López, Julio; Papa Quiroz, Erick Article OPTIMIZATION (2017)
Embedded heterogeneous feature selection for conjoint analysis=> A SVM approach using L1 penalty Maldonado, Sebastián; Montoya, Ricardo; López, Julio Article APPLIED INTELLIGENCE (2017)
Group-Penalized Feature Selection and Robust Twin SVM Classification via Second-order cone programming López, Julio; Maldonado, Sebastián Article NEUROCOMPUTING (2017)
Integrated framework for profit-based feature selection and SVM classification in credit scoring Maldonado, S; Bravo, C; Lopez, J; Perez, J Article ISI SCOPUS Decision Support Systems (2017)
Robust kernel-based multiclass support vector machines via second-order cone programming Maldonado, Sebastián; López, Julio Article APPLIED INTELLIGENCE (2017)
Simultaneous preference estimation and heterogeneity control for choice-based conjoint via support vector machines Maldonado, Sebastian; Montoya, Ricardo; Lopez, Julio Article ISI SCOPUS Journal of the Operational Research Society (2017)
Synchronized feature selection for Support Vector Machines with twin hyperplanes Maldonado S.; López J. Article ISI SCOPUS KNOWLEDGE-BASED SYSTEMS (2017)
A novel multi-class SVM model using second-order cone constraints Lopez, J.; Maldonado S.; Carrasco M. Article ISI SCOPUS APPLIED INTELLIGENCE (2016)
A second-order cone programming formulation for nonparallel hyperplane support vector machine Carrasco M.; Lopez, J.; Maldonado S. Article ISI SCOPUS EXPERT SYSTEMS WITH APPLICATIONS (2016)
A second-order cone programming formulation for Twin Support Vector Machines Maldonado, Sebastián; López, Julio; Carrasco, Miguel Article APPLIED INTELLIGENCE (2016)
Interior proximal bundle algorithm with variable metric for nonsmooth convex symmetric cone programming Alvarez, F; Lopez, J Article Optimization (2016)
Multi-class Second-Order Cone Programming Support Vector Machines López, Julio; Mladonado, Sebastián Article INFORMATION SCIENCES (2016)
Multi-class second-order cone programming support vector machines Lopez, Julio; Maldonado, Sebastian Article WOS core collection ISI INFORMATION SCIENCES (2016)
A multi-class SVM approach based on the l(1)-norm minimization of the distances between the reduced convex hulls Carrasco M.; Lopez, J.; Maldonado S. Article ISI SCOPUS PATTERN RECOGNITION (2015)
An embedded feature selection approach for support vector classification via second-order cone programming S. Maldonado; López, J. Article Intelligent Data Analysis (2015)
Robust feature selection for multiclass Support Vector Machines using second-order cone programming Lpez, Julio; Maldonado, Sebastin; Bravo, Cristin; Davison, Matt; Jofré, Alejandro; Weber, Richard Article ISI INTELLIGENT DATA ANALYSIS (2015)
A Note on the Paper Linear Complementarity Problems Over Symmetric Cones: Characterization of Qb-Transformations and Existence Results Lopez, J.; Lopez R.; Ramírez H. Article ISI SCOPUS JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS (2014)
Alternative second-order cone programming formulations for support vector classification Maldonado S.; Lopez, J. Article ISI SCOPUS INFORMATION SCIENCES (2014)
Imbalanced data classification using second-order cone programming support vector machines Maldonado, Sebastin; Lpez, Julio Article ISI PATTERN RECOGNITION (2014)
Linear complementarity problems over symmetric cones: Characterization of Qb-transformations and existence results J. López; R. López; H. Ramírez C. Article Journal optimization theory and applications (2013)
Support vector machine under uncertainty: An application for hydroacoustic classification of fish-schools in Chile Bosch P.; Lopez, J.; Ramírez H.; Robotham H. Article ISI SCOPUS Expert Systems with Applications (2013)
Characterizing Q-linear transformations for semidefinite linear complementarity problems Lopez, J.; Lopez R.; Héctor Ramírez C. Article ISI SCOPUS Nonlinear Analysis, Theory, Methods and Applications (2012)
Convergence to the Optimal Value for Barrier Methods Combined with Hessian Riemannian Gradient Flows and Generalized Proximal Algorithms Alvarez, F.; Lopez, J. Article ISI SCOPUS Journal of Convex Analysis (2010)
Interior proximal algorithm with variable metric for second-order cone programming: applications to structural optimization and support vector machines Alvarez, F.; Lopez, J.; Ramirez, CH Article ISI SCOPUS Optimization Methods and Software (2010)
ON THE CENTRAL PATHS AND CAUCHY TRAJECTORIES IN SEMIDEFINITE PROGRAMMING Lopez, J.; Ramírez H. Article ISI KYBERNETIKA (2010)


Improving out-of-time predictive performance in business analytics via robust optimization and profit metrics Maldonado, Sebastián; Lopez, Julio; Vairetti, Carla; Perez, Juan; Iturriaga, Andrés Proyecto (2020)
Optimization methods applied to support vector machine classification Carrasco, Miguel; Lopez, Julio; Bosch, Paul Proyecto (2020)
Numerical and theoretical study of conic complementarity problems. Applications to Robust Multiclass classification FONDECYT (1160894) Proyecto 2016-2019 Inv. Principal
Optimization algorithms for mathematical programing problems and engineering applications FONDECYT (1130905) Proyecto 2013-2016 Coinvestigador(a)
Fortalecimiento del Grupo de An?alisis y Modelamiento Matem?atico Valpara??iso (AM2V) PAI (7909008) Proyecto 2011-2012 Investigador(a)
Numerical Study of Proximal Type Algorithm for Convex Programming with Particular Structure and Analysis of Semide?nite Programs FONDECYT (11110188) Proyecto 2011-2014 Inv. Responsable
Postdoctorado Fondecyt=> Numerical Algorithms for Nonsmooth Optimization and Variational Inequalities over Second Order Cone FONDECYT (3100131) Proyecto 2009-2011 Inv. Responsable