2,148 research outputs found
Study of the gluonic quartic gauge couplings at muon colliders
The potential of the muon colliders open up new possibilities for the
exploration of new physics beyond the Standard Model. It is worthwhile to
investigate whether muon colliders are suitable for studying gluonic quartic
gauge couplings~(gQGCs), which can be contributed by dimension-8 operators in
the framework of the Standard Model effective field theory, and are intensively
studied recently. In this paper, we study the sensitivity of the process
to gQGCs. Our result indicate that the muon
colliders with c.m. energies larger than can be more sensitive
to gQGCs than the Large Hadron Collider.Comment: 11 pages, 5 figure
1S0 pairing correlation in symmetric nuclear matter with Debye screening effects
AbstractThe 1S0 pairing of symmetric nuclear matter is discussed in the framework of relativistic nuclear theory with Dyson–Schwinger equations (DSEs). The in-medium nucleon and meson propagators are treated in a more self-consistent way through meson polarizations. The screening effects on mesons due to in-medium nucleon excitation are found to reduce the 1S0 pairing gap and shift remarkably the gap peak to low density region
2-Ferrocenyl-6-methylpyridin-3-ol
In the title compound, [Fe(C5H5)(C11H10NO)], the dihedral angle between the pyridyl and substituted cyclopentadienyl rings is 20.4 (3)°. The H atoms of the methyl group are disordered over two positions; their site-occupation factors were fixed at 0.5. The crystal structure is stabilized by well defined intermolecular O—H⋯N and C—H⋯O hydrogen bonds, leading to the formation of a two-dimensional network parallel to (101)
Mutual Information Rate of Gaussian and Truncated Gaussian Inputs on Intensity-Driven Signal Transduction Channels
In this letter, we investigate the mutual information rate (MIR) achieved by
an independent identically distributed (IID) Gaussian input on the
intensity-driven signal transduction channel. Specifically, the asymptotic
expression of the continuous-time MIR is given. Next, aiming at low
computational complexity, we also deduce an approximately numerical solution
for this MIR. Moreover, the corresponding lower and upper bounds that can be
used to find the capacity-achieving input distribution parameters are derived
in closed-form. Finally, simulation results show the accuracy of our analysis.Comment: Accepted for publication in IEEE Communications Letter
SMMix: Self-Motivated Image Mixing for Vision Transformers
CutMix is a vital augmentation strategy that determines the performance and
generalization ability of vision transformers (ViTs). However, the
inconsistency between the mixed images and the corresponding labels harms its
efficacy. Existing CutMix variants tackle this problem by generating more
consistent mixed images or more precise mixed labels, but inevitably introduce
heavy training overhead or require extra information, undermining ease of use.
To this end, we propose an efficient and effective Self-Motivated image Mixing
method (SMMix), which motivates both image and label enhancement by the model
under training itself. Specifically, we propose a max-min attention region
mixing approach that enriches the attention-focused objects in the mixed
images. Then, we introduce a fine-grained label assignment technique that
co-trains the output tokens of mixed images with fine-grained supervision.
Moreover, we devise a novel feature consistency constraint to align features
from mixed and unmixed images. Due to the subtle designs of the self-motivated
paradigm, our SMMix is significant in its smaller training overhead and better
performance than other CutMix variants. In particular, SMMix improves the
accuracy of DeiT-T/S, CaiT-XXS-24/36, and PVT-T/S/M/L by more than +1% on
ImageNet-1k. The generalization capability of our method is also demonstrated
on downstream tasks and out-of-distribution datasets. Code of this project is
available at https://github.com/ChenMnZ/SMMix
Spatial Re-parameterization for N:M Sparsity
This paper presents a Spatial Re-parameterization (SpRe) method for the N:M
sparsity in CNNs. SpRe is stemmed from an observation regarding the restricted
variety in spatial sparsity present in N:M sparsity compared with unstructured
sparsity. Particularly, N:M sparsity exhibits a fixed sparsity rate within the
spatial domains due to its distinctive pattern that mandates N non-zero
components among M successive weights in the input channel dimension of
convolution filters. On the contrary, we observe that unstructured sparsity
displays a substantial divergence in sparsity across the spatial domains, which
we experimentally verified to be very crucial for its robust performance
retention compared with N:M sparsity. Therefore, SpRe employs the
spatial-sparsity distribution of unstructured sparsity to assign an extra
branch in conjunction with the original N:M branch at training time, which
allows the N:M sparse network to sustain a similar distribution of spatial
sparsity with unstructured sparsity. During inference, the extra branch can be
further re-parameterized into the main N:M branch, without exerting any
distortion on the sparse pattern or additional computation costs. SpRe has
achieved a commendable feat by matching the performance of N:M sparsity methods
with state-of-the-art unstructured sparsity methods across various benchmarks.
Code and models are anonymously available at
\url{https://github.com/zyxxmu/SpRe}.Comment: 11 pages, 4 figure
Model-Driven Based Deep Unfolding Equalizer for Underwater Acoustic OFDM Communications
It is challenging to design an equalizer for the complex time-frequency
doubly-selective channel. In this paper, we employ the deep unfolding approach
to establish an equalizer for the underwater acoustic (UWA) orthogonal
frequency division multiplexing (OFDM) system, namely UDNet. Each layer of
UDNet is designed according to the classical minimum mean square error (MMSE)
equalizer. Moreover, we consider the QPSK equalization as a four-classification
task and adopt minimum Kullback-Leibler (KL) to achieve a smaller symbol error
rate (SER) with the one-hot coding instead of the MMSE criterion. In addition,
we introduce a sliding structure based on the banded approximation of the
channel matrix to reduce the network size and aid UDNet to perform well for
different-length signals without changing the network structure. Furthermore,
we apply the measured at-sea doubly-selective UWA channel and offshore
background noise to evaluate the proposed equalizer. Experimental results show
that the proposed UDNet performs better with low computational complexity.
Concretely, the SER of UDNet is nearly an order of magnitude lower than that of
MMSE
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