1,502 research outputs found
Transcriptome profiling of low temperature-treated cassava apical shoots showed dynamic responses of tropical plant to cold stress
Seismic Behavior of Turbine-Generator Foundation under Strong Earthquake Action in Different Directions
In order to study seismic behavior of half-speed turbine-generator foundation under horizontal earthquake loading in different directions, the 1/10 scaled model was designed and fabricated. The rigid foundation of half-speed turbine-generator sets can be seen as a complex space frame system. The tests were conducted under eight earthquake waves in two directions separately. The loading directions were along the axis of longitudinal and transverse. The seismic response of displacement and story drift was investigated by a pseudodynamic test. The hysteresis behavior and crack propagation were analyzed. From the research, it is shown that the maximum displacement of the foundation under the earthquake of intensity 7 is 15.20 mm (longitudinal), basically in the range of elastic deformation. The seismic response of earthquake input in different directions is obviously different. Under the same earthquake input, the seismic displacement along the axis of longitudinal is larger than that of transverse. Under the rarely earthquake of intensity 8, the foundation still keeps good working condition. The maximum elastic-plastic story drift is 1/191 under the limit value 1/50 provided in the Code for Seismic Design of Buildings. The deformation capacity of the structure meets the requirements of the current seismic design code of China
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
Compensatory sweating after restricting or lowering the level of sympathectomy: a systematic review and meta-analysis
OBJECTIVE: To compare compensatory sweating after lowering or restricting the level of sympathectomy. METHOD: A systematic review and meta-analysis were conducted of all randomized controlled trials published in English that compared compensatory sweating after lowering or restricting the level of sympathectomy. The Cochrane collaboration tool was used to assess the risk of bias, and the Mantel-Haenszel odds ratio method was used for the meta-analysis. RESULTS: A total of 11 randomized controlled trials were included, including a total of 1079 patients. Five of the randomized controlled trials studied restricting the level of sympathectomy, and the remaining six studied lowering the level of sympathectomy. CONCLUSIONS: The compiled randomized controlled trial results published so far in the literature do not support the claims that lowering or restricting the level of sympathetic ablation results in less compensatory sweating
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
Bis{(E)-4-bromo-2-[(2-chloro-3-pyridÂyl)iminoÂmethÂyl]phenolato-κ2 N,O}copper(II)
In the title complex, [Cu(C12H7BrClN2O)2], the CuII center is tetraÂcoordinated by two phenolate O and two azomethine N atoms from two independent bidentate 4-bromo-2-[(2-chloro-3-pyridÂyl)iminoÂmethÂyl]phenolate (L) ligands. In the crystal structure, the CuII atom has a distorted square-planar coordination environment. The interÂplanar dihedral angles between the benzene and pyridine rings in the individual ligands are 63.83 (4) and 54.43 (3)°, indicating the pyridine ring to have considerably weaker steric hindrance
Electrical tuning of robust layered antiferromagnetism in MXene monolayer
A-type antiferromagnetism, with an in-plane ferromagnetic order and the
interlayer antiferromagnetic coupling, owns inborn advantages for electrical
manipulations but is naturally rare in real materials except in those
artificial antiferromagnetic heterostructures. Here, a robust layered
antiferromagnetism with a high N\'eel temperature is predicted in a MXene
CrCCl monolayer, which provides an ideal platform as a magnetoelectric
field effect transistor. Based on first-principles calculations, we demonstrate
that an electric field can induce the band splitting between spin-up and
spin-down channels. Although no net magnetization is generated, the inversion
symmetry between the lower Cr layer and the upper Cr layer is broken via
electronic cloud distortions. Moreover, this electric field can be replaced by
a proximate ferroelectric layer for nonvolatility. The magneto-optic Kerr
effect can be used to detect this magnetoelectricity, even if it is a collinear
antiferromagnet with zero magnetization
- …