5,572 research outputs found
Forward Attention in Sequence-to-sequence Acoustic Modelling for Speech Synthesis
This paper proposes a forward attention method for the sequenceto- sequence
acoustic modeling of speech synthesis. This method is motivated by the nature
of the monotonic alignment from phone sequences to acoustic sequences. Only the
alignment paths that satisfy the monotonic condition are taken into
consideration at each decoder timestep. The modified attention probabilities at
each timestep are computed recursively using a forward algorithm. A transition
agent for forward attention is further proposed, which helps the attention
mechanism to make decisions whether to move forward or stay at each decoder
timestep. Experimental results show that the proposed forward attention method
achieves faster convergence speed and higher stability than the baseline
attention method. Besides, the method of forward attention with transition
agent can also help improve the naturalness of synthetic speech and control the
speed of synthetic speech effectively.Comment: 5 pages, 3 figures, 2 tables. Published in IEEE International
Conference on Acoustics, Speech and Signal Processing 2018 (ICASSP2018
Electron self-energy and effective mass in a single heterostructure
In this paper, we investigate the electron self-energy and effective mass in
a single heterostructure using Green-function method. Numerical calculations of
the electron self-energy and effective mass for GaAs/AlAs heterostructure are
performed. The results show that the self energy (effective mass) of electron,
which incorporate the energy of electron coupling to interface-optical phonons
and half three-dimension LO phonons, monotonically increase(decrease) from that
of interface polaron to that of 3D bulk polaron with the increase of the
distance between the position of the electron and interface.Comment: 10 pages, 2 figure
Particle-number conserving analysis for the 2-quasiparticle and high- multi-quasiparticle states in doubly-odd Lu
Two-quasiparticle bands and low-lying excited high- four-, six-, and
eight-quasiparticle bands in the doubly-odd Lu are analyzed by
using the cranked shell model (CSM) with the pairing correlations treated by a
particle-number conserving (PNC) method, in which the blocking effects are
taken into account exactly. The proton and neutron Nilsson level schemes for
Lu are taken from the adjacent odd- Lu and Hf isotopes, which
are adopted to reproduce the experimental bandhead energies of the
one-quasiproton and one-quasineutron bands of these odd- Lu and Hf nuclei,
respectively. Once the quasiparticle configurations are determined, the
experimental bandhead energies and the moments of inertia of these two- and
multi-quasiparticle bands are well reproduced by PNC-CSM calculations. The
Coriolis mixing of the low- () two-quasiparticle band
of the Gallagher-Moszkowski doublet with one nucleon in the
orbital is analyzed.Comment: 8 pages, 5 figures, 2 tables, to be published at Chinese Physics
Quantum information processing architecture with endohedral fullerenes in a carbon nanotube
A potential quantum information processor is proposed using a fullerene
peapod, i.e., an array of the endohedral fullerenes 15N@C60 or 31P@C60
contained in a single walled carbon nanotube (SWCNT). The qubits are encoded in
the nuclear spins of the doped atoms, while the electronic spins are used for
initialization and readout, as well as for two-qubit operations.Comment: 8 pages, 8 figure
Morphology of the immature stages of Panorpa qinlingensis (Mecoptera: Panorpidae) with notes on its biology
The scorpionfly Panorpa qinlingensis Chou & Ran is described and illustrated in detail for its immature stages, including egg, larva, and pupa. The egg is oval with chorion decorated with irregular polygonal network. The larva is eruciform and peripneustic, bearing eight pairs of abdominal prolegs. A pair of prominent compound eyes are present on head. The first instar larva differs from later instars in possessing a prominent egg burster on frons and with clavate setae. The pupa is exarate and decticous, taking the shape of the adults. The scorpionfly is bivoltine, overwintering as prepupal stage in the soil. The durations of the egg, larval, and pupal stages are 5–9 d, 19–27 d, and 8–18 d respectively for the first generation. Adults emerge from mid May to early June and from late July to mid August in the Micang Mountain, central China
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