I am an Assistant Computational Mathematician in the Laboratory for Advanced Numerical Simulations at Argonne National Laboratory & fellow of the Computation Institute, The University of Chicago. Previously I was the Wilkinson fellow, Mathematics and Computer Science, Argonne National Laboratory. I hold a PhD in Computer Science (2008) from Virginia Tech under advisor prof. Adrian Sandu (research highlight).

Research Interests:

Time-stepping for PDEs and ODEs Multirate - GLM - IMEX Implementation in PETSc library	Uncertainty Quantification, Data Assimilation & Sensitivity Analysis	Adaptive Mesh Refinement
	Forecast page

Projects: (most pages in this section are under construction)

Recent papers (see all):

• Emil M. Constantinescu and Adrian Sandu, "Extrapolated multirate methods for differential equations with multiple time scales." Journal of Scientific Computing, Vol. 56(1), pp 28-44, 2013.

   

• Emil M. Constantinescu and Mihai Anitescu, "Physics-based covariance models for Gaussian processes with multiple outputs." International Journal for Uncertainty Quantification,Vol. 3(1), pp 47-71, 2013.

   

• Xiaoyan Zeng*, Beth A. Drewniak, and Emil M. Constantinescu, "Calibration of the crop model in the Community Land Model." Vol. 6(1), Pages 379-398, Geoscientific Model Development, submitted; Preprint # ANL/MCS-P3054-1112, 2013.

   

• David E. Keyes, Lois Curfman McInnes, Carol Woodward, William Gropp, Eric Myra, Michael Pernice, John Bell, Jed Brown, Alain Clo, Jeffrey Connors, Emil Constantinescu, Don Estep, Kate Evans, Charbel Farhat, Ammar Hakim, Glenn Hammond, Glen Hansen, Judith Hill, Tobin Isaac, Xiaomin Jiao, Kirk Jordan, Dinesh Kaushik, Efthimios Kaxiras, Alice Koniges, Kihwan Lee, Aaron Lott, Qiming Lu, John Magerlein, Reed Maxwell, Michael McCourt, Miriam Mehl, Roger Pawlowski, Amanda Peters Randles, Daniel Reynolds, Beatrice Rivière, Ulrich Rüde, Tim Scheibe, John Shadid, Brendan Sheehan, Mark Shephard, Andrew Siegel, Barry Smith, Xianzhu Tang, Cian Wilson, and Barbara Wohlmuth "Multiphysics Simulations: Challenges and Opportunities." International Journal of High Performance Computing Applications, 27(1): 4-83, 2013. -->> Tech Report verion:

   

• D.E. Keyes, L.C. McInnes, C. Woodward, W.D. Gropp, E. Myra, M. Pernice, J. Bell, J. Brown, A. Clo, J. Connors, E. Constantinescu, D. Estep, K. Evans, C. Farhat, A. Hakim, G. Hammond, G. Hansen, J. Hill, T. Isaac, X. Jiao, K. Jordan, D. Kaushik, E. Kaxiras, A. Koniges, K. Lee, A. Lott, Q. Lu, J. Magerlein, R. Maxwell, M. McCourt, M. Mehl, R. Pawlowski, A. Peters, D. Reynolds, B. Rivière, U. Rüde, T. Scheibe, J. Shadid, B. Sheehan, M. Shephard, A. Siegel, B. Smith, X. Tang, C. Wilson, B. Wohlmuth, "Multiphysics Simulations: Challenges and Opportunities." Tech. Rep. ANL/MCS-TM-321, Revision 1.1, October 2012, Argonne National Laboratory. ICiS Multiphysics 2011 Workshop Report, Park City, Utah, July 30 - August 6, 2012. To appear as a special issue of the International Journal of High Performance Computing Applications.

   

• Ricardo J. Bessa, Vladimiro Miranda, Audun Botterud, Jianhui Wang, and Emil Constantinescu, "Time Adaptive Conditional Kernel Density Estimation for Wind Power Forecasting." IEEE Transactions on Sustainable Energy (Special Wind Energy issue), Vol. 3(4), Pages 660-669, 2012.

   

• Francis X Giraldo, James F. Kelly, and Emil Constantinescu, "Implicit-explicit formulations of a three-dimensional nonhydrostatic unified model of the atmosphere (NUMA)." SIAM Journal on Scientific Computing (SISC), submitted, Preprint # ANL/MCS-P2083-0512, 2012.

   

• Barry Smith, Lois Curfman McInnes, Emil Constantinescu, Mark Adams, Satish Balay, Jed Brown, Matthew Knepley, and Hong Zhang, "PETSc's Software Strategy for the Design Space of Composable Extreme-Scale Solvers." (Preprint # ANL/MCS-P2059-0312) DOE Exascale Research Conference, April 16-18, 2012, Portland, OR, 2012.

   

• Juan M. Salazar, Urmila Diwekar, Emil M. Constantinescu, and Victor Zavala, "Stochastic Optimization Approach to Water Management in Cooling-Constrained Power Plants." submitted to Applied Energy, 2012.

   

• Mihai Anitescu, Xiaoyan Zeng*, and Emil M. Constantinescu, "A low-memory approach for best-state estimation of hidden Markov models with model error." SIAM Journal on Numerical Analysis (SINUM), submitted, 2012.

   

• Alexandru Cioaca*, Victor Zavala, and Emil M. Constantinescu, "Adjoint Sensitivity Analysis for Numerical Weather Prediction: Applications to Power Grid Optimization."Submitted to 1st International Workshop on High Performance Computing, Networking and Analytics for the Power Grid, Preprint # ANL/MCS-P1928-0911, Seattle, WA, USA, November 13, 2011.

   

• Emil M. Constantinescu,Victor Zavala, Matthew Rocklin*, Sangmin Lee, and Mihai Anitescu, "A Computational Framework for Uncertainty Quantification and Stochastic Optimization in Unit Commitment with Wind Power Generation." Vol. 26(1), Pages 431-441, IEEE Transactions on Power Systems, 2011.

   

• Adrian Sandu, Emil M. Constantinescu, Gregory R. Carmichael, Tianfeng Chai, Dacian Daescu and John Seinfeld "Ensemble Methods for Dynamic Data Assimilation of Chemical Observations in Atmospheric Models." Vol. 5(4), Pages 667-692, Journal of Algorithms & Computational Technology, 2011.

   

• Emil M. Constantinescu and Adrian Sandu, "Optimal strong-stability-preserving general linear methods." SIAM Journal of Scientific Computing, Vol. 32(5), Pages 3130-3150, 2010. -> Technical report with complete results.

   

• Emil M. Constantinescu and Adrian Sandu, "Extrapolated implicit-explicit time stepping." Vol. 31(6), Pages 4452-4477, SIAM Journal of Scientific Computing, 2010. -> Technical report version.

   

• Victor M. Zavala, Jianhui Wang, Sven Leyffer, Emil M. Constantinescu, Mihai Anitescu, and Guenter Conzelmann, "Proactive energy management for next-generation building systems." SimBuild 2010, August 11-13, 2010.

   

Postdocs:

Debojyoti Ghosh (2013-, Time stepping - PETSc)
Xiaoyan Zeng (2012, UQ - UQ for the crop model in the CESM - community climate model)

Students practicum:

Hong Zhang (2012, graduate, Computer Science, Virginia Tech)
Alexandru Cioaca (2010, 2011, graduate, Computer Science, Virginia Tech)
Jeffrey Steward (2010, graduate, Mathematics, Florida State University)
Matthew Rocklin (2009, graduate, Computer Science, University of Chicago)

updated May 2013