Note that this seems to be a grab-bag of papers/posters referencing "deep learning" from 2014. I'm not sure what this adds over the equivalent Google Scholar query.

If you're interested in very recent advances in machine learning (including deep learning), optimization, I'd suggest also looking at the papers accepted at top conferences in ML, e.g.

ICLR 2014 - http://openreview.net/venue/iclr2014

ECCV 2014 - http://eccv2014.org/

EMNLP 2014 - http://emnlp2014.org/papers.html

KDD 2014 - http://www.kdd.org/kdd2014/index.html (research track)

NIPS 2013 - http://nips.cc/Conferences/2013/Program/accepted-papers.php