I found my topic. "ForestNet: Towards an alternative to DeepForest" https://arxiv.org/abs/1702.08835 pic.twitter.com/rOD5VGGRDe
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...it seems to be about a classic ensemble technique (cascading clf with input reinjection). This is old news, and not a competitor to DL.
Remember: stacking classifiers, even in a smart way, can never beat *joint training of a feature hierarchy*. "Joint" in particular is key.
I like how the paper title contains all the three choices from your poll. At least that's novel.
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