@conference {Zhang:2015cd, title = {DNN Speaker Adaptation using Parameterised Sigmoid and ReLU Hidden Activation Functions}, booktitle = {Proc. ICASSP{\textquoteright}16}, year = {2016}, address = {Shanghai, China}, url = {http://mi.eng.cam.ac.uk/~cz277/doc/Conference-ICASSP2016-ADAPT.pdf}, author = {Zhang, C. and Woodland, P.C.} }