Ya Ju Fan

Email: fan4@llnl.gov
Phone: +19254234438

Ya Ju Fan is a computational scientist at the Center for Applied Scientific Computing at the Lawrence Livermore National Laboratory. She received her PhD in Industrial and Systems Engineering at Rutgers University and her M.Sc. in Decision Science from the University of Wisconsin-Madison.

Her research interests include identifying and developing data-driven mathematical models and statistical methods for analyzing scientific data, motivated by interpreting the mathematical aspects of machine learning methods that equip potential to solve practical problems. Examples of these methods are nonlinear dimension reduction, anomaly detection, unsupervised learning, predictive models, uncertainty quantification, and neural networks.

She has been involved in several application areas, such as pattern recognition in cancer genome, diurnal patterns and anomalies in wind energy generation, small data regression in additive manufacturing, classifying EEG time series, and prediction according to hospital patient records.

Selected Publications

Y. J. Fan, J. Allen, S. A. Jacobs and B. Van Essen. “Distinguishing between Normal and Cancer Cells Using Autoencoder Node Saliency”. Second ISC HPC Applications in Precision Medicine Workshop. June 28, 2018.

Y. J. Fan. “Autoencoder Node Saliency: Selecting Relevant Latent Representations”. Pattern Recognition, Volume 88, pp.643-653. April 2019. https://doi.org/10.1016/j.patcog.2018.12.015

Y. J. Fan and C. Kamath. "A comparison of compressed sensing and sparse recovery algorithms applied to simulation data". Statistics, Optimization, and Information Computing, Vol. 4, Issue 3, pp. 194-213. September 2016. 

Y. J. Fan and C. Kamath. "Detecting ramp events in wind energy generation using affinity evaluation on weather data". Statistical Analysis and Data Mining, Volume 9, issue 3, pp. 155–173. June 2016.

Y. J. Fan and C. Kamath. "Practical Considerations in Applying Compressed Sensing to Simulation Data". Data Compression Conference (DCC). April 2015.

Y. J. Fan and C. Kamath. “Identifying and Exploiting Diurnal Motifs in Wind Generation Time Series Data”. International Journal of Pattern Recognition and Artificial Intelligence , Vol 29, Number 2, pp. 1550012-1 - 1550012-25. March 2015.

C. Kamath and Y. J. Fan. "Incremental SVD for Insight into Wind Generation". 13th International Conference on Machine Learning and Applications ICMLA 2014. December 2014.

C. Kamath and Y. J. Fan. “Finding Motifs in Wind Generation Time Series Data”. 11th International Conference on Machine Learning and Applications ICMLA 2012. December 2012.

C. Kamath and Y. J. Fan. “Using Data Mining Techniques to Enable Integration of Wind Energy on the Power Grid”.  Statistical Analysis & Data Mining. Volume 5, Issue 5, pp 410-427, October 2012.

Y.  J. Fan and C. Kamath. “On the Selection of Dimension Reduction Techniques for Scientific Applications”.  Annals of Information Systems. To Appear. August 2012.

Y. J. Fan, and W. A. Chaovalitwongse, "Optimizing Feature Selection to Improve Medical Diagnosis". Annals of Operations Research on Data Mining, 174(1): 169-183, 2010.

W. A. Chaovalitwongse, Y. J. Fan, and R. C. Sachdeo. "Novel Optimization Models for Abnormal Brain Activity Classification". Operations Research, 56(6): 1450-1460, December, 2008.

W. A. Chaovalitwongse, Y. J. Fan, and R. C. Sachdeo. "On the Time Series K-Nearest Neighbor Classification of Abnormal Brain". IEEE Transactions on Systems, Man, and Cybernetics, Part A: Systems and Humans, 37(6): 1005-1016, November, 2007.

W. A. Chaovalitwongse, Y. J. Fan, and R. C. Sachdeo. Support Feature Machine for Classification of Abnormal Brain Activity. The Thirteenth ACM SIGKDD International Conference On Knowledge Discovery and Data Mining (SIGKDD 2007), pp. 113-122.

Presentations

“Distinguishing between Normal and Cancer Cells Using Autoencoder Node Saliency”. Second ISC HPC Applications in Precision Medicine Workshop. Frankfurt, Germany. June 28, 2018

"Incremental SVD for Insight into Wind Generation", 13th International Conference on Machine Learning and Applications, Detroit, MI. December 3-5, 2014.

“Exploiting Motifs and Anomalies in Streaming Data”, Department of Energy Applied Mathematics Program Meeting, Albuquerque, NM. August 5-8, 2013.

“Detecting Changes in Weather Data Streams for Wind Energy Prediction”, SIAM Annual Meeting, San Diego, CA. July 8-12, 2013.

“Determining Number of Motifs in Wind Generation Time Series Data”, SIAM Annual Meeting, San Diego, CA. July 8-12, 2013.

“Finding Motifs in Wind Generation Time Series Data”, 11th International Conference on Machine Learning and Applications, Boca Raton, FL. December 12-15, 2012.

 “A Heuristic for the Local Region Covering Problem”, 21st International Symposium on Mathematical Programming, Berlin, Germany. August 19-24, 2012.

“A Comparison of Dimensionality Reduction Techniques in Scientific Applications”, Center for Advanced Signal and Image Sciences, Livermore, CA. May 23, 2012.

 “A Comparison of Dimensionality Reduction Techniques in Scientific Applications”, SIAM Conference on Uncertainty Quantification, Raleigh, NC. April 2-5, 2012.

 “Intrinsic Dimensionality Using Non-linear Dimension Reduction Techniques”, Institute for Operations Research and Management Sciences Annual Meeting, Charlotte, NC. November 13-16, 2011.

“A Comparison of Non-linear Techniques for Dimension Reduction”, LLNL Postdoc Poster Symposium. June 1, 2011.

“Medical Data Classification Via Optimizing Feature Selection”, Institute for Operations Research and the Management Sciences (INFORMS) Annual Meeting, Washington, D.C. October 2008.

“Classification of Normal and Abnormal EEG Signals Using K-Nearest Neighbor Rule in Support Feature Machine”, Conference on Computational Neuroscience, University of Florida, Gainesville, FL. February 2008.

“On the Time Series K-Nearest Neighbor Classification of Abnormal Brain Activity”, Institute for Operations Research and the Management Sciences (INFORMS) Annual Meeting, Pittsburgh, PA. November 2006.

Honors & Awards

  • Pierskalla Best Paper Award, INFORMS Annual Meeting, Washington, D.C., October 2008.
  • Transportation Coordinating Council / Federal Transit Administration (TCC/FTA) Fellowship, Fall 2007 and Spring 2008
  • Kuhl Memorial Engineering Fellowship, Rutgers Graduate School, Fall 2006