Ann B Lee

Ann B Lee

Professor, Co-Director of PhD Program in Statistics

Department of Statistics & Data Science / Machine Learning Department, Carnegie Mellon University

Welcome!

I am a professor in the Department of Statistics & Data Science at Carnegie Mellon University, with a joint appointment in the Machine Learning Department. Prior to joining CMU in 2005, I was the J.W. Gibbs Assistant Professor in the department of mathematics at Yale University, and before that I served a year as a visiting research associate at the department of applied mathematics at Brown University.

My research interests are in developing statistical methodology for complex data and problems in the physical sciences. I am particularly interested in statistical methods that adapt to nonlinear sparse structure in high-dimensional data, and nonparametric approaches that can handle heterogeneous data from different scientific probes. My recent work includes uncertainty quantification via conditional density estimation, likelihood-free inference, validation of emulator models, and applications in astronomy and hurricane intensity guidance involving satellite imagery and massive astronomical surveys.

In 2018, I started the STAtistical Methods for Physical Sciences (STAMPS) research group together with Mikael Kuusela. STAMPS is hosting public colloquia-style webinars open to all members of the scientific community, in addition to weekly research group meetings for students and faculty at CMU and UPitt.

I am also key personnel at the NSF AI Planning Institute for Data-Driven Discovery in Physics. In July 2021, I co-organized our AI-physics virtual conference “From Quarks to Cosmos with AI”.

đźš© Upcoming! May 29-June 19, 2022: Workshop “Interplay of Fundamental Physics and Machine Learning”, Aspen Center of Physics. (Co-organized with Konstantin Matchev, Harrison Prosper, and Jesse Thaler)

Interests

  • Statistical Machine Learning
  • High-Dimensional Inference
  • Nonlinear Dimension Reduction
  • Likelihood-Free Inference
  • Statistics for the Physical Sciences

Education

  • PhD in Physics

    Brown University

  • MSc/BSc in Engineering Physics

    Chalmers University of Technology, Sweden

Recent Papers

Trey McNeely, Galen Vincent, Rafael Izbicki, Kimberly M. Wood, Ann B. Lee (2021). Identifying Distributional Differences in Convective Evolution Prior to Rapid Intensification in Tropical Cyclones. Tackling Climate Change with Machine Learning workshop at NeurIPS 2021 (poster).

Preprint

Niccolò Dalmasso, David Zhao, Rafael Izbicki, Ann B. Lee (2021). Likelihood-Free Frequentist Inference: Bridging Classical Statistics and Machine Learning in Simulation and Uncertainty Quantification. Submitted.

Preprint Code

David Zhao, Niccolò Dalmasso, Rafael Izbicki, Ann B. Lee (2021). Diagnostics for Conditional Density Models and Bayesian Inference Algorithms. Proceedings of the 37th Conference on Uncertainty in Artificial Intelligence (UAI 2021). To appear in PMLR.

Preprint Code Video

Addison J. Hu, Mikael Kuusela, Ann B. Lee, Donata Giglio, Kimberly M. Wood (2020). Spatio-temporal methods for estimating subsurface ocean thermal response to tropical cyclones. Submitted.

Preprint

Trey McNeely, Niccolò Dalmasso, Kimberly M. Wood, Ann B. Lee (2020). Structural Forecasting for Tropical Cyclone Intensity Prediction: Providing Insight with Deep Learning. Tackling Climate Change with Machine Learning workshop at NeurIPS 2020 (Spotlight talk).

Preprint Slides Video

Lorenzo Tomaselli, Coty Jen, Ann B. Lee (2020). Wildfire Smoke and Air Quality: How Machine Learning Can Guide Forest Management. Tackling Climate Change with Machine Learning workshop at NeurIPS 2020 (Spotlight talk).

Preprint Slides Video

Niccolò Dalmasso, Galen Vincent, Dorit Hammerling, Ann B. Lee (2020). HECT: High-Dimensional Ensemble Consistency Testing for Climate Models. Tackling Climate Change with Machine Learning workshop at NeurIPS 2020.

Preprint Slides Video

Trey McNeely, Ann B. Lee, Kimberly M. Wood, Dorit Hammerling (2020). Unlocking GOES: A Statistical Framework for Quantifying the Evolution of Convective Structure in Tropical Cyclones. Journal of Applied Meteorology and Climatology (JAMC), 1(57), 2020.

Preprint Poster DOI

Niccolò Dalmasso, Rafael Izbicki, Ann B. Lee (2020). Confidence Sets and Hypothesis Testing in a Likelihood-Free Inference Setting. Proceedings of the Thirty-Seventh International Conference on Machine Learning (ICML 2020), PMLR 119:2323-2334, 2020.

Preprint PDF Code Video

S. J. Schmidt et al. (24 members of the LSST Dark Energy Science Collaboration) (2020). Evaluation of probabilistic photometric redshift estimation approaches for LSST. Monthly Notices of the Royal Astronomical Society, Volume 499, Issue 2, December 2020, Pages 1587–1606.

Preprint Code DOI

Niccolò Dalmasso, Taylor Pospisil, Ann B. Lee, Rafael Izbicki, Peter E. Freeman, Alex I. Malz (2019). Conditional Density Estimation Tools in Python and R with Applications to Photometric Redshifts and Likelihood-Free Cosmological Inference. Astronomy and Computing, Volume 30, January 2020.

Preprint Code Slides Video DOI

Niccolò Dalmasso, Ann B. Lee, Rafael Izbicki, Taylor Pospisil, Ilmun Kim, Chieh-An Lin (2019). Validation of Approximate Likelihood and Emulator Models for Computationally Intensive Simulations. Proceedings of Machine Learning Research (AISTATS 2020 Track).

Preprint PDF Code Video

Ilmun Kim, Ann B. Lee, Jing Lei (2019). Global and Local Two-Sample Tests via Regression. Electronic Journal of Statistics, 13(2): 5253–5305, 2019.

Preprint DOI

Taylor Pospisil, Ann B. Lee (2019). (f)RFCDE: Random Forests for Conditional Density Estimation and Functional Data.

Preprint Code

Chien-Hao Lin, Joachim Harnois-DĂ©raps, Tim Eifler, Taylor Pospisil, Rachel Mandelbaum, Ann B. Lee, Sukhdeep Singh (2019). Non-Gaussianity in the Weak Lensing Correlation Function Likelihood - Implications for Cosmological Parameter Biases. Monthly Notices of the Royal Astronomical Society, Volume 499, Issue 2, December 2020, Pages 2977–2993.

Preprint DOI

See all publications

Group

I coordinate the STAtistical Methods for the Physical Sciences (STAMPS) Research Group at CMU together with Mikael Kuusela.

I am fortunate to advise the following amazing students:

Current PhD Students

Trey McNeely (thesis) David Zhao (thesis) Galen Vincent (project 2021)
Luca Masserano (project 2021)

Previous PhD Students

  • Niccolò (Nic) Dalmasso
    – PhD May 2021, Department of Statistics & Data Science, CMU
    – Thesis title: Uncertainty Quantification in Simulation-based Inference
    – 2021 ASA Student of the Year, Pittsburgh Chapter

  • Taylor Pospisil
    – PhD May 2019, Department of Statistics & Data Science, CMU
    – Thesis title: Conditional Density Estimation for Regression and Likelihood-Free Inference

  • Rafael Izbicki
    – PhD April 2014, Department of Statistics, CMU
    – Thesis title: A Spectral Series Approach to High-Dimensional Nonparametric Inference
    – 2014 Best Thesis Award, Department of Statistics, CMU

  • Di Liu
    – PhD July 2012, Department of Statistics, CMU
    – Thesis title: Comparing Data Sources in High Dimensions

  • Andrew Crossett
    – co-advised with Kathryn Roeder
    – PhD May 2012, Department of Statistics, CMU
    – Thesis title: Using Dimension Reduction Techniques to Model Genetic Relationships for Association Studies

  • Susan Buchman
    – co-advised with Chad Schafer
    – PhD March 2011, Department of Statistics, CMU
    – Thesis title: High-Dimensional Adaptive Basis Density Estimation

  • Joseph W. Richards
    – co-advised with Chad Schafer
    – PhD July 2010, Department of Statistics, CMU
    – Thesis title: Fast and Accurate Estimation for Astrophysical Problems in Large Databases
    – 2010 ASA Student of the Year, Pittsburgh Chapter

  • Diana Luca
    – co-advised with Kathryn Roeder
    – PhD Sept 2008, Department of Statistics, CMU
    – Thesis title: Genetic Matching by Ancestry in Genome-Wide Association Studies

News & Events

Talks

(non-technical)

Teaching

  • Regression Analysis (STAT 36-707); Fall 2021.
  • Modern Ideas in Statistics and AI for Climate and Environmental Sciences (STAT 36-722); Spring 2021.
  • Advanced Methods for Data Analysis (STAT 36-402/608); Spring 2017, 2018, 2019, 2020, 2021.
  • Modern Regression (STAT 36-401/607); Fall 2018.
  • Advanced Data Analysis II (STAT 36-758); Fall 2015, 2016, 2017.
  • Mathematical Statistics Honors (STAT 36-326); Spring 2014, 2015, 2016.
  • Probability and Statistics I (STAT 36-625); Fall 2005, 2006, 2007, 2013, 2014.
  • Statistical Practice (STAT 36-726); Spring 2012, 2016.
  • Engineering Statistics and Quality Control (STAT 36-220); Fall 2010, 2011.
  • Machine Learning Journal Club (ML 10-915), Machine Learning Department, CMU; Fall 2009, 2010.
  • Probability and Statistics II (STAT 36-626); Spring 2006, 2007, 2008, 2010.
  • Probability and Statistics for Business Applications (STAT 36-207); Fall 2009.
  • Applied Mathematics and Engineering I (AMTH 251), Yale University; Fall 2003, 2004.
  • Introduction to Calculus in Several Variables (MATH 118), Yale University; Spring 2004.
  • Pattern Theory and its Applications (STAT 2), 12th Jyväskylä Ph.D. Summer School, Aug 2002, Finland.

Contact