Publications

Journal articles

61. J. Madariaga, H. Ramírez. Facial approach for constructing stationary points for mathematical programs with cone complementarity constraints. Submitted.

60. R. Andreani, G. Haeser, L.M. Mito, H. Ramírez. A minimal face constant rank constraint qualification for reducible conic programming. Submitted. http://arxiv.org/abs/2304.13881

59. E. Molina, A. Rapaport, H. Ramírez.   Equivalent formulations of optimal control problems with maximum cost and applications. JOTA (2022). DOI: https://doi.org/10.1007/s10957-022-02094-z ; https://arxiv.org/abs/2202.12545

58. E. Molina, P. Martinon, H. Ramírez. Optimal control approaches for open pit planning. To appear in Optimization and Engineering. (see HAL Id: hal-03588436 for a previous version).  

57.  J. Dunstan, F. Villena; J. P. Hoyos; V. Riquelme; M. Royer; H. Ramírez; J. Peypouquet. Predicting no-show appointments in a pediatric hospital in Chile using machine learning.  Health Care Management Science (2023). DOI: https://doi.org/10.1007/s10729-022-09626-z

56. R. Andreani, G. Haeser, L.M. Mito, H. Ramírez. T. Silva. First- and second-order optimality conditions for second-order cone and semidefinite programming under a constant rank condition. Math. Prog. (2023).  DOI: 10.1007/s10107-023-01942-8. 

55. R. Andreani, G. Haeser, L.M. Mito, H. Ramírez. Sequential constant rank constraint qualifications for nonlinear semidefinite programming with applications. Set-Valued Var. Anal., vol 31(3), 2023. DOI: 10.1007/s11228-023-00666-3. Previous version available in Optimization Online (ID: 2021-06-8431).

54. R. Andreani, G. Haeser, L.M. Mito, H. Ramírez. Weak notions of nondegeneracy in nonlinear semidefinite programming. Math. Prog. (2023). DOI: 10.1007/s10107-023-01970-4

53. R. Andreani, G. Haeser, L.M. Mito, H. Ramírez. T. Silva.   Global Convergence of Algorithms Under Constant Rank Conditions for Nonlinear Second-Order Cone Programming. JOTA (2022). DOI: 10.1007/s10957-022-02056-5. 

52. C. Castillo-Laborde, T. de Wolff, P. Gajardo, R. Lecaros, G. Olivar, H. Ramírez C. Assessment of event-triggered policies of nonpharmaceutical interventions based on epidemiological indicators. Journal of Math. Biology (2021). https://doi.org/10.1007/s00285-021-01669-0

51. R. Andreani, G. Haeser, L.M. Mito, H. Ramírez, D.O. Santos, T.P. Silveira. Naive constant rank-type constraint qualifications for multifold second-order cone programming and semidefinite programming. Optimization Letters, vol 16, pages 589–610, 2022.  https://arxiv.org/abs/2008.07894v2

50.  J. P. Contreras, F. Díaz-Alvarado, Felipe, S. Flores and H. Ramírez. A General Symmetry Breaker for Continuous-Time Representation: An Application in Crude-Oil Scheduling Problem. Submitted.

49.   R. Andreani, E.H. Fukuda, G. Haeser, H. Ramírez, D.O. Santos, P.J.S. Silva, T.P. Silveira. Erratum to: New Constraint Qualifications and Optimality Conditions for Second Order Cone Programs. Set-Valued Var. Anal, vol 30, pages 329–333, 2022. https://doi.org/10.1007/s11228-021-00573-5

48.  C. Castillo-Laborde, P. Gajardo, M. Nájera-De Ferrari, I. Matute, M. Hirmas-Adauy, P. Aguirre, H. Ramírez, D. Ramírez, X. Aguilera. Modelling the Cost-Effectiveness of Using Rapid Test for Syphilis Detection in Prison Population: exploratory exercise in a Chilean male prison. Cost Effectiveness and Resource Allocation, vol 19(1):5, 2021. doi: 10.1186/s12962-021-00257-9

47. P. Ugalde-Salas, H. Ramírez, J. Harmand, E. Desmond-Le Quéméner. Microbial Interactions as Drivers of a Nitrification Process in a Chemostat. Bioengineering, vol. 8(3), 31, pp. 1-32, 2021.  https://doi.org/10.3390/bioengineering8030031

46.  H. Ramírez and V. Roshchina. Refining the partition for multifold conic optimization problems.  Optimization, vol. 69 (11), pp. 2489-2507, 2020.  DOI: 10.1080/02331934.2020.1822835

45.  V. Riquelme, T. J. Quinn II, and H. Ramírez. The role of uncertainty in the design of sustainable and precautionary management strategies for fisheries.  Natural Resource Modeling, vol. 33(3), 2020. https://doi.org/10.1111/nrm.12279

44.   A. Haddon, H. Ramírez, and A. Rapaport. A Note on “Optimal and Sub-Optimal Feedback Controls for Biogas Production”.  J. Optim. Theory Appl. vol. 86, pp. 1053-1055, 2020. DOI: 10.1007/s10957-020-01723

43.  A. Haddon, H. Ramírez, and A. Rapaport. Optimal and suboptimal feedback controls for biogas production. J. Optim. Theory Appl., vol. 183(2), pp.642-670, 2019. DOI: 10.1007/s10957-019-01570-3

42.  E. Cruz, O. Vasilieva and H. Ramírez. Catch-to-stock dependence: the case of small pelagic fishery with bounded harvesting effort. Natural Resource Modeling, vol. 32(1), pp. 1-32, 2019. DOI: 10.1111/nrm.12193

41.  P. Ugalde-Salas, F. Díaz-Alvarado, Felipe, S. Flores and H. Ramírez. An Optimization Model to Incorporate CO2 Emissions in the Scheduling of Crude Oil Operations. Industrial and Engineering Chemistry Research, vol 57, pp. 11342-11349, 2018. DOI: 10.1021/acs.iecr.7b04331

40.  P. Gajardo, M. Olivares, and H. Ramírez. Methods for the Sustainable Rebuilding of Overexploited Natural Resources: A viability approach. Environmental Modelling & Assesment, vol. 23(6), pp.  713-727, 2018. DOI: 10.1007/s10666-018-9611-9.

39.  H. Ramírez, A. Rojas, and D. Jeison. Productivity optimization of microalgae cultivation in a batch photobioreactor process. Mathematical Methods in the Applied Sciences, vol 41 (1), pp. 386-406, 2018. DOI: 10.1002/mma.4621

38. P. Gajardo, J. Harmand, H. Ramírez C., A. Rapaport, V. Riquelme, A. Rousseau. Modeling and control of in-situ decontamination of large water resources. ESAIM: Proceedings and Surveys, Vol. 57, pp. 70-85, 2017.

37.   F. Opazo, J. Outrata and H. Ramírez. Erratum: on the Aubin property of critical points to perturbed second-order cone programs. SIAM J. on Optimization, vol 27(3), 2143-2151, 2017.

36.   F. Mairet, H. Ramírez C., and A. Rojas-Palma. Modeling and stability analysis of microalgal pond with nitrification. Applied Mathematical Modeling. Vol 51, pp. 448-468 (2017). DOI: 10.1016/j.apm.2017.07.008

35.   A. Rapaport, A. Rojas, J. R. de Dreuzy and H. Ramírez. Equivalence of Finite Dimensioanl Input-Output Models of Solute Transport and Diffusion in Goesciences. IEEE Transactions in Automatic Control. Vol 62(10), pp. 5470-5477 (2017). DOI: 10.1109/TAC.2017.2701150

34.   H. Ramírez and D. Sossa, On the Central Paths in Symmetric Cone Programming. J. Optim. Theory Appl. 172 , no. 2, pp. 649–668 (2017).

33.   H. Ramírez, A. Rapaport and V. Riquelme. Minimal time bioremediation of water resources with two patches. SIAM Journal Control and Optimization. Vol 53(4), pp. 1697-1718 (2016).

32.   Martinet V., Peña-Torres J., De Lara M., Ramírez C. H., Risk and Sustainability: Assessing Fishery Management Strategies. Environmental and Resource Economics. Volume 64, Issue 4, pp. 683–707 (2016).

31.   B. Mordukhovich, J. Outrata, H. Ramírez C. Graphical derivatives and stability analysis for parameterized equilibria with conic constraints. Set-Valued Var. Anal., No 1, Pages 76-101 (2015)

30.   B. Mordukhovich, J. Outrata, H. Ramírez C., Second-Order Variational Analysis in Conic Programming with Applications to Optimality and Stability. SIAM Journal on Optimization, Volume 25, 1, Pages 76-101 (2015).

29.   P. Gajardo, H. Ramírez C., J. Rodríguez, Tools for improving feeding strategies in a SBR with several species. Bioprocess and Biosystems Engineering. Volume 27, Pages 63-70 (2014). 

28.   López, Julio; López, Rúben; Ramírez, Héctor A note on the paper "Linear complementarity problems over symmetric cones: characterization of Qb-transformations and existence results''. J. Optim. Theory Appl., Vol 163, no. 1, 351–354, 2014.

27.   Rodríguez, J. C.; Ramírez, H.; Gajardo, P.; Rapaport, A. Optimality of affine control system of several species in competition on a sequential batch reactor. Internat. J. Control 87 (2014), no. 9, 1877–1885.

26.   J. Amaya, H. Ramírez, P., Application of local search to crew scheduling. The Pyrenees International Workshop and Summer School on Statistics, Probability and Operations Research—SPO 2011, 23–32, Monogr. Mat. García Galdeano, 38, Prensas Univ. Zaragoza, Zaragoza, 2013.

25.   J. López, R. López, H. Ramírez C., Linear Complementarity Problems Over Symmetric Cones: Chatacterizations of Q_b-Transformations and Existence Results. Journal of Optimization Theory and Applications. Volume 159, Issue 3 (2013), Pages 741-768

24.   P. Bosch, J. López, H. Ramírez C., H. Robotham, Support vector machine under uncertainty: an application for hydroacoustic classification of fish-schools in Chile. Expert Systems with Applications (2013). 

23.   H. Ramírez C., A. Seeger, D. Sossa, Commutation principle for variational problems on Euclidean Jordan algebras. SIAM Journal of Optimization, Vol 23, No 3, Pages  687-694 (2013).

22.   Pedro Gajardo, H. Ramírez C., Alain Rapaport, V. Ríquelme, Bioremediation of Natural Resources via Optimal Control Techniques, International Symposium on Mathematical and Computational Biology, Santiago, Chile, November (2011).

21.   J. López, R. López, H. Ramírez C., Characterizing Q-Linear Transformations for Semidefinite Linear Complementarity Problems. Nonlinear Analysis: Theory, Methods and Applications. Volume 75, Issue 3, February 2012, Pages 1441–1448 (2012). 

20.   J. Outrata, H. Ramírez C., On the Aubin Property of Critical Points to Perturbed Second-Order Cone Programs. SIAM Journal on Optimization, vol. 21, Issue 3, pp. 798-823. (2011). 

19.   P. Gajardo, J. Peña-Torres, and H. Ramírez C., Harvesting economic models and catch-to-biomass dependence: The case of small pelagic fish. Natural Resource Modeling, 24, (2), pp. 268--296. (2011). 

18.   P. Gajardo, J. Harmand, H. Ramírez C., A. Rapaport, Minimal time bioremediation of natural water resources. Automatica, vol. 47, pp. 1764-1769. (2011). 

17.   M. De Lara, P. Gajardo, and H. Ramírez C., Viable states for monotone harvest models. Systems and Control Letters, 60, pp. 192--197.  (2011). 

16.   J. López, H. Ramírez C., On the Central Path and Cauchy Trajectories in Semidefinite Programming. Kibernetika, vol. 46, no. 3, pp. 524-535. (2010). 

15.   F. Alvarez, J. López, H. Ramírez C., Interior proximal algorithm with variable metric for second-order cone programming: applications to structural optimization and support vector machines. Optimization Methods and Software, vol. 25, no. 6, pp. 859-881. (2010). 

14.   W. Gómez, H. Ramírez C., A Filter Algorithm for Nonlinear Semidefinite Programming.  Computational and Applied Mathematics, vol. 29, no. 2, pp. 297-328. (2010). 

13.   P. Gajardo, F. Mazenc, H. Ramírez C., Competitive exclusion principle in a model of chemostat with delays. Dynamics of Continuous, Discrete and Impulsive Systems Series A: Mathematical Analysis, 16, pp. 253-272. (2009).

12.   P. Gajardo, H. Ramírez C., A. Rapaport. Minimal Time Sequential Batch Reactors with Bounded and Impulse Controls for One or More Species. SIAM Journal on Control and Optimization, vol. 47, Issue 6, pp. 2827-2856. (2008). 

11.   A. Auslender and H. Ramírez C. Penalty and Barrier Methods for Convex  Semidefinite Programmming. Mathematical Methods for Operations Research (Ex ZOR), vol. 63, issue 2, 2006.

10.   J. F. Bonnans and H. Ramírez C. Perturbation Analysis of Second-Order Cone Programming Problems.  Math. Programming Series B, vol. 104, Numbers 2-3,  pp. 205 - 227, November 2005.

9.   R. Correa and H. Ramírez C. A Global Algorithm for Nonlinear Semidefinite Programming. SIAM Journal on Optimization, vol 15, N 1, pp. 303-318, 2004.

 

Conference proceedings (peer reviewed)

8.   A. Haddon, H. Ramírez, A. Rapaport. First results of optimal control of average biogas production for the chemostat over an infinite horizon. Proceedings of the IFAC International Conference on Mathematical Modelling- MATHMOD 2018, vol. 51, N 2, pp. 725-729, 2018. 

7.   A. Haddon, J. Harmand, H. Ramírez and A. Rapaport. Guaranteed Value Strategy for the Optimal Control of Biogas Production in Continuous Bio-Reactors. Proceeding of the IFAC World Congress 2017, vol 50, N 1, pp. 8728-8733, 2017.

6.   Fontbona, J., Ramírez-Cabrera, H., Riquelme, V. and Silva, F. J. Stochastic modelling and control of bioreactors. Proceeding of the IFAC World Congress 2017, vol 50, N 1, pp. 12611-12616, 2017.

5.   P. Gajardo, H. Ramírez C., J. Rodríguez, On Optimal feeding for Feeding in Minimal Time a SBR with Several Species, 20th Mediterranean Conference on Control and Automation, Barcelona, Spain. July 2012.

4.   V. Martinet, J. Peña, M. Lara, H. Ramírez C., Evaluation of management procedures: Application to Chilean Jack Mackerel fishery. Proceeding of Economics of Fish Resources and Aquatic Ecosystems (IIEFT). (2010). 

3.   A. Rapaport, P. Gajardo and H. Ramírez C.  About Minimal Time Impulsive Control of Sequential Batch Reactors with Several Species. American Control Conference 2007, pp. 6116-6121, IEEE 2007.


Nonpublished technical reports

2.   J. López, R. López, and H. Ramírez. Existence and stability results based on asymptotic analysis for Semidefinite Linear Complementarity Problems. Technical Report DIM-CMM Nº B 11/09-241, 2011. 

1.   J. F. Bonnans and H. Ramírez C. Strong Regularity of Semidefinite Programming Problems. Technical Report DIM-CMM Nº B-05/06-137, 2005.


Books