277 research outputs found
Constructing Long Short-Term Memory based Deep Recurrent Neural Networks for Large Vocabulary Speech Recognition
Long short-term memory (LSTM) based acoustic modeling methods have recently
been shown to give state-of-the-art performance on some speech recognition
tasks. To achieve a further performance improvement, in this research, deep
extensions on LSTM are investigated considering that deep hierarchical model
has turned out to be more efficient than a shallow one. Motivated by previous
research on constructing deep recurrent neural networks (RNNs), alternative
deep LSTM architectures are proposed and empirically evaluated on a large
vocabulary conversational telephone speech recognition task. Meanwhile,
regarding to multi-GPU devices, the training process for LSTM networks is
introduced and discussed. Experimental results demonstrate that the deep LSTM
networks benefit from the depth and yield the state-of-the-art performance on
this task.Comment: submitted to ICASSP 2015 which does not perform blind review
Distinct behaviors of suppression to superconductivity in induced by Fe and Co dopants
In the superconductor LaRuSi with the Kagome lattice of Ru, we have
successfully doped the Ru with Fe and Co atoms. Contrasting behaviors of
suppression to superconductivity is discovered between the Fe and the Co
dopants: Fe-impurities can suppress the superconductivity completely at a
doping level of only 3%, while the superconductivity is suppressed slowly with
the Co dopants. A systematic magnetization measurements indicate that the doped
Fe impurities lead to spin-polarized electrons yielding magnetic moments with
the magnitude of 1.6 \ per Fe, while the electrons given by the Co
dopants have the same density of states for spin-up and spin-down leading to
much weaker magnetic moments. It is the strong local magnetic moments given by
the Fe-dopants that suppress the superconductivity. The band structure
calculation further supports this conclusion.Comment: 6 pages, 7 figure
- …