1,679 research outputs found
Periodic Radio Variability in NRAO 530: Phase Dispersion Minimization Analysis
In this paper, a periodicity analysis of the radio light curves of the blazar
NRAO 530 at 14.5, 8.0, and 4.8 GHz is presented employing an improved Phase
Dispersion Minimization (PDM) technique. The result, which shows two persistent
periodic components of and years at all three frequencies,
is consistent with the results obtained with the Lomb-Scargle periodogram and
weighted wavelet Z-transform algorithms. The reliability of the derived
periodicities is confirmed by the Monte Carlo numerical simulations which show
a high statistical confidence. (Quasi-)Periodic fluctuations of the radio
luminosity of NRAO 530 might be associated with the oscillations of the
accretion disk triggered by hydrodynamic instabilities of the accreted flow.
\keywords{methods: statistical -- galaxies: active -- galaxies: quasar:
individual: NRAO 530}Comment: 8 pages, 5 figures, accepted by RA
CIF-PT: Bridging Speech and Text Representations for Spoken Language Understanding via Continuous Integrate-and-Fire Pre-Training
Speech or text representation generated by pre-trained models contains
modal-specific information that could be combined for benefiting spoken
language understanding (SLU) tasks. In this work, we propose a novel
pre-training paradigm termed Continuous Integrate-and-Fire Pre-Training
(CIF-PT). It relies on a simple but effective frame-to-token alignment:
continuous integrate-and-fire (CIF) to bridge the representations between
speech and text. It jointly performs speech-to-text training and language model
distillation through CIF as the pre-training (PT). Evaluated on SLU benchmark
SLURP dataset, CIF-PT outperforms the state-of-the-art model by 1.94% of
accuracy and 2.71% of SLU-F1 on the tasks of intent classification and slot
filling, respectively. We also observe the cross-modal representation extracted
by CIF-PT obtains better performance than other neural interfaces for the tasks
of SLU, including the dominant speech representation learned from
self-supervised pre-training.Comment: Accepted by ACL 2023 Finding
Nuclear charge radii in Bayesian neural networks revisited
In this work, a refined Bayesian neural network (BNN) based approach with six
inputs including the proton number, mass number, and engineered features
associated with the pairing effect, shell effect, isospin effect, and
``abnormal" shape staggering effect of Hg, is proposed to
accurately describe nuclear charge radii. The new approach is able to well
describe the charge radii of atomic nuclei with and . The
standard root-mean-square (rms) deviation is fm for both the training
and validation data. In particular, the predicted charge radii of proton-rich
and neutron-rich calcium isotopes are found in good agreement with data. We
further demonstrate the reliability of the BNN approach by investigating the
variations of the rms deviation with extrapolation distances, mass numbers, and
isospin asymmetries.Comment: 16 pages, 6 figure
Influence of different processing times on the quality of Polygoni Multiflora Radix by metabolomics based on ultra high performance liquid chromatography with quadrupole timeĂą ofĂą flight mass spectrometry
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/136757/1/jssc5378_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/136757/2/jssc5378.pd
- âŠ