Seminar za primenjenu matematiku i računarstvo, 27. avgust 2012.

• 17. Avgust,  2012
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Naredno predavanje na Seminaru za primenjenu matematiku i računarstvo održaće se 27. avgusta 2012. 15 časova u sali 301f na Matematičkom institutu SANU.

Predavač: Zoran Obradović, Director, Center for Data Analytics and Biomedical Informatics, Temple University, Philadelphia, USA

Naslov predavanja: SPATIO-TEMPORAL REGRESSION FOR VARYING QUALITY DATA IN THE PRESENCE OF A LARGE FRACTION OF MISSING VALUES

Sadržaj: We will first describe our method for spatio-temporal regression from data of varying quality based on Gaussian Conditional Random Fields. When applied to a challenging real-life data of varying quality, this method successfully exploited spatio-temporal properties of observations and outperformed existing alternatives. Next, we will discuss our method for regression from spatio-temporal data with a large fraction of missing values. Our method outperformed alternatives when imputing up to 80% of nonrandom missing values inspatio-temporal multivariate data and accuracy of spatio-temporal regression on such imputed data was much better than when imputing data by nine alternatives. Finally, we will show how to completely avoid the data imputation step when learning form partial observations by taking into account the uncertainty of each instance due to the missing values. Ourrecent method (published last month at AAAI 2012 conference) was shown to outperform the alternatives when there is a large fraction of missing values in data.

O predavaču:
Zoran Obradovic is professor of Computer and Information Sciences and the director of the Center for Data Analytics and Biomedical Informatics at Temple University in Philadelphia. His data analytics work is published in more than 260 articles and is cited more than 8,700 times (H-index 40 and I10-index 87).Obradovic is the executive editor at the journal on Statistical Analysis and Data Mining, which is the official publication of the American Statistical Association (ASA) and is currently an editorial board member at eleven journals.Dr. Obradovic is general co-chair for 2013 and 2014 SIAM International Conference on Data Mining and was the program and/or track chair at many data mining and biomedical informatics conference.

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