341,212 research outputs found
DARTS-ASR: Differentiable Architecture Search for Multilingual Speech Recognition and Adaptation
In previous works, only parameter weights of ASR models are optimized under
fixed-topology architecture. However, the design of successful model
architecture has always relied on human experience and intuition. Besides, many
hyperparameters related to model architecture need to be manually tuned.
Therefore in this paper, we propose an ASR approach with efficient
gradient-based architecture search, DARTS-ASR. In order to examine the
generalizability of DARTS-ASR, we apply our approach not only on many languages
to perform monolingual ASR, but also on a multilingual ASR setting. Following
previous works, we conducted experiments on a multilingual dataset, IARPA
BABEL. The experiment results show that our approach outperformed the baseline
fixed-topology architecture by 10.2% and 10.0% relative reduction on character
error rates under monolingual and multilingual ASR settings respectively.
Furthermore, we perform some analysis on the searched architectures by
DARTS-ASR.Comment: Accepted at INTERSPEECH 202
Magnetic Field Effects in the Pseudogap Phase: A Precursor Superconductivity Scenario
We demonstrate that the observed dependences of and on small
magnetic fields can be readily understood in a precursor superconductivity
approach to the pseudogap phase. In this approach, the presence of a pseudogap
at (but not at ) and the associated suppression of the density of
states lead to very different sensitivities to pair-breaking perturbations for
the two temperatures. Our semi-quantitative results address the puzzling
experimental observation that the coherence length is weakly dependent on
hole concentration throughout most of the phase diagram. We present our
results in a form which can be compared with the recent experiments of
Shibauchi et al, and argue that orbital effects contribute in an important way
to the dependence of .Comment: 6 pages, 1 figure, elsart.cls included. Submitted to the proceeding
of SNS 2001, Chicag
Sharing, Liking, Commenting, and Distressed? The Pathway Between Facebook Interaction and Psychological Distress
Studies on the mental health implications of social media have generated mixed results. Drawing on a survey of college students (N=513), this research uses structural equation modeling to assess the relationship between Facebook interaction and psychological distress and two underlying mechanisms: communication overload and self-esteem. It is the first study, to our knowledge, that examines how communication overload mediates the mental health implications of social media. Frequent Facebook interaction is associated with greater distress directly and indirectly via a two-step pathway that increases communication overload and reduces self-esteem. The research sheds light on new directions for understanding psychological well-being in an increasingly mediated social world as users share, like, and comment more and more.Radio-Television-Fil
Emergent orbitals in the cluster Mott insulator on a breathing Kagome lattice
Motivated by the recent developments on cluster Mott insulating materials
such as the cluster magnet LiZnMoO, we consider the strong
plaquette charge ordered regime of the extended Hubbard model on a breathing
Kagome lattice and reveal the properties of the cluster Mottness. The plaquette
charge order arises from the inter-site charge interaction and the collective
motion of three localized electrons on the hexagon plaquettes. This model leads
naturally to a reduction of the local moments by 2/3 as observed in
LiZnMoO. Furthermore, at low temperatures each hexagon plaquette
contains an extra orbital-like degree of freedom in addition to the remaining
spin 1/2. We explore the consequence of this emergent orbital degree of
freedom. We point out the interaction between the local moments is naturally
described by a Kugel-Khomskii spin-orbital model. We develop a parton approach
and suggest a spin liquid ground state with spinon Fermi surfaces for this
model. We further predict an emergent orbital order when the system is under a
strong magnetic field. Various experimental consequences for
LiZnMoO are discussed, including an argument that the charge
ordering much be short ranged if the charge per Mo is slightly off
stoichiometry.Comment: 12 pages, 13 figure
- …