no code implementations • 4 Nov 2019 • Timmy Li, Yi Huang, James Evans, Ishanu Chattopadhyay
Large-scale trends in urban crime and global terrorism are well-predicted by socio-economic drivers, but focused, event-level predictions have had limited success.
no code implementations • 26 Sep 2019 • Yi Huang, Ishanu Chattopadhyay
Recognizing subtle historical patterns is central to modeling and forecasting problems in time series analysis.
no code implementations • 9 Apr 2018 • Shahab Asoodeh, Yi Huang, Ishanu Chattopadhyay
We investigate the problem of reliable communication between two legitimate parties over deletion channels under an active eavesdropping (aka jamming) adversarial model.
no code implementations • 2 Mar 2018 • Boyuan Chen, Harvey Wu, Warren Mo, Ishanu Chattopadhyay, Hod Lipson
We introduce an automatic machine learning (AutoML) modeling architecture called Autostacker, which combines an innovative hierarchical stacking architecture and an Evolutionary Algorithm (EA) to perform efficient parameter search.
no code implementations • 25 Jan 2018 • Ishanu Chattopadhyay
Identifying meaningful signal buried in noise is a problem of interest arising in diverse scenarios of data-driven modeling.
no code implementations • 23 Jan 2018 • Jaideep Dhanoa, Balaji Manicassamy, Ishanu Chattopadhyay
Viral zoonoses have emerged as the key drivers of recent pandemics.
no code implementations • ICLR 2018 • Boyuan Chen, Warren Mo, Ishanu Chattopadhyay, Hod Lipson
We significantly reduce the time of AutoML with a naturally inspired algorithm - Parallel Hill Climbing (PHC).
1 code implementation • 25 Jun 2014 • Ishanu Chattopadhyay
While correlation measures are used to discern statistical relationships between observed variables in almost all branches of data-driven scientific inquiry, what we are really interested in is the existence of causal dependence.
no code implementations • 3 Jan 2014 • Ishanu Chattopadhyay, Hod Lipson
Entropy rate of sequential data-streams naturally quantifies the complexity of the generative process.
1 code implementation • 3 Jan 2014 • Ishanu Chattopadhyay, Hod Lipson
Here, we propose a universal solution to this problem: we delineate a principle for quantifying similarity between sources of arbitrary data streams, without a priori knowledge, features or training.