143 research outputs found
CIAN: Cross-Image Affinity Net for Weakly Supervised Semantic Segmentation
Weakly supervised semantic segmentation with only image-level labels saves
large human effort to annotate pixel-level labels. Cutting-edge approaches rely
on various innovative constraints and heuristic rules to generate the masks for
every single image. Although great progress has been achieved by these methods,
they treat each image independently and do not take account of the
relationships across different images. In this paper, however, we argue that
the cross-image relationship is vital for weakly supervised segmentation.
Because it connects related regions across images, where supplementary
representations can be propagated to obtain more consistent and integral
regions. To leverage this information, we propose an end-to-end cross-image
affinity module, which exploits pixel-level cross-image relationships with only
image-level labels. By means of this, our approach achieves 64.3% and 65.3%
mIoU on Pascal VOC 2012 validation and test set respectively, which is a new
state-of-the-art result by only using image-level labels for weakly supervised
semantic segmentation, demonstrating the superiority of our approach.Comment: 9 pages, 4 figures, AAAI 202
Methyl 2-[2-((Z)-{1-trans-[2-(4-fluoro-3-methylphenyl)-2-methylcyclopropyl]ethylidene}aminooxymethyl)phenyl]-2-[(E)-methoxyimino]acetate
The title compound, C24H27FN2O4, is an important intermediate in the synthesis of fungicidal strobilurin-type compounds. In the crystal structure, the oxime bond attached to the cyclopropane ring adopts a Z configuration, while the oxime bond attached to the benzene ring adopts an E configuration. The fluoromethylphenyl group adopts a trans configuration with respect to the remainder of the molecule, and its mean plane forms a dihedral angle of 56.1 (1)° with the plane of the cyclopropane ring
Design and Synthesis Functional Selective Catalytic Reduction Catalyst for NOx Removal
AbstractMeOx-Cu-SSZ-13 (Me=Mn, Ce) was synthesized by physically mixing mental oxide and ion-exchanged zeolite. The composite catalyst showed highly efficient for the NOx removal using NH3-SCR method. And the NO conversion is 98% for MnOx-CeO2/Cu-SSZ-13 at 150°C and 97% for MnOx/Cu-SSZ-13 at 175°C. Meanwhile, the N2 selectivity remains more than 98%. The catalysts are characterized by using XRD and SEM. The XRD patterns show that all samples are highly crystallized and without impurities. The SEM demonstrates all samples have uniform crystal size. Composite catalyst especially combined with Cu-SSZ-13 has considerable potential as a catalyst in the area of NOx conversion
Chemical markers for the quality control of herbal medicines: an overview
Selection of chemical markers is crucial for the quality control of herbal medicines, including authentication of genuine species, harvesting the best quality raw materials, evaluation of post-harvesting handling, assessment of intermediates and finished products, and detection of harmful or toxic ingredients. Ideal chemical markers should be the therapeutic components of herbal medicines. However, for most herbal medicines, the therapeutic components have not been fully elucidated or easily monitored. Bioactive, characteristic, main, synergistic, correlative, toxic and general components may be selected. This article reviews the effective use of chemical markers in the quality control of herbal medicines including the selection criteria considering the roles and physicochemical factors which may affect the effective use of chemical markers
StyleS2ST: Zero-shot Style Transfer for Direct Speech-to-speech Translation
Direct speech-to-speech translation (S2ST) has gradually become popular as it
has many advantages compared with cascade S2ST. However, current research
mainly focuses on the accuracy of semantic translation and ignores the speech
style transfer from a source language to a target language. The lack of
high-fidelity expressive parallel data makes such style transfer challenging,
especially in more practical zero-shot scenarios. To solve this problem, we
first build a parallel corpus using a multi-lingual multi-speaker
text-to-speech synthesis (TTS) system and then propose the StyleS2ST model with
cross-lingual speech style transfer ability based on a style adaptor on a
direct S2ST system framework. Enabling continuous style space modeling of an
acoustic model through parallel corpus training and non-parallel TTS data
augmentation, StyleS2ST captures cross-lingual acoustic feature mapping from
the source to the target language. Experiments show that StyleS2ST achieves
good style similarity and naturalness in both in-set and out-of-set zero-shot
scenarios.Comment: Accepted to Interspeech 202
Observation of giant nonreciprocal charge transport from quantum Hall edge states of single surface in topological insulator
Symmetry breaking in quantum materials is of great importance and leads to
novel nonreciprocal charge transport. The topological insulator system provides
a unique platform to study nonreciprocal charge transport due to the exotic
surface state. But it is typically small in magnitude because the contributions
from the top and bottom surface of topological insulator are usually opposite.
Here, we report the observation of giant nonreciprocal charge transport
mediated by the quantum Hall state in intrinsic topological insulator
Sn-Bi1.1Sb0.9Te2S devices, which is attributed to the coexistence of quantum
Hall states and Dirac surface states. A giant nonreciprocal coefficient of up
to 2.26*10^5 A^-1 is found, because only a single surface of topological
insulator contributes to the nonreciprocal charge transport. Our work not only
reveals the intrinsic properties of nonreciprocal charge transport in
topological insulators, but also paves the way for future electronic devices
Large Exchange Bias Effect and Coverage-Dependent Interfacial Coupling in CrI3/MnBi2Te4 van der Waals Heterostructures
Igniting interface magnetic ordering of magnetic topological insulators by
building a van der Waals heterostructure can help to reveal novel quantum
states and design functional devices. Here, we observe an interesting exchange
bias effect, indicating successful interfacial magnetic coupling, in
CrI3/MnBi2Te4 ferromagnetic insulator/antiferromagnetic topological insulator
(FMI/AFM-TI) heterostructure devices. The devices originally exhibit a negative
exchange bias field, which decays with increasing temperature and is unaffected
by the back-gate voltage. When we change the device configuration to be
half-covered by CrI3, the exchange bias becomes positive with a very large
exchange bias field exceeding 300 mT. Such sensitive manipulation is explained
by the competition between the FM and AFM coupling at the interface of CrI3 and
MnBi2Te4, pointing to coverage-dependent interfacial magnetic interactions. Our
work will facilitate the development of topological and antiferromagnetic
devices
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