2,820 research outputs found
Methyl 2-[(4-chloro-2-methoxy-5-oxo-2,5-dihydrofuran-3-yl)amino]acetate
The title compound, C8H10ClNO5, was obtained via a tandem Michael addition–elimination reaction of 3,4-dichloro-5-methoxyfuran-2(5H)-one and glycine methyl ester in the presence of triethylamine. The molecular structure contains an approximately planar [maximum atomic deviation = 0.010 (2) Å] five-membered furanone ring. The crystal packing is stabilized by intermolecular N—H⋯O and weak C—H⋯O hydrogen bonding
(E)-Methyl 2-chloro-4-dicyclohexylamino-4-oxobut-2-enoate
In the title compound, C17H26ClNO3, both cyclohexyl rings have chair conformations. In the crystal, molecules are linked by weak intermolecular C—H⋯O hydrogen bonds
4-(Diphenylphosphanyl)benzoic acid
In the title compound, C19H15O2P, the dihedral angles between the benzoic acid ring and the phenyl rings are 75.64 (7) and 80.88 (7)°; the dihedral angle between the phenyl rings is 81.35 (7)°. In the crystal, inversion dimers linked by pairs of O—H⋯O hydrogen bonds generate R
2
2(8) loops between the head-to-head carboxylic acid groups
(5S)-3-Chloro-4-diallylamino-5-[(1R,2S,5R)-2-isopropyl-5-methylcyclohexyloxy]furan-2(5H)-one
The title compound, C20H30ClNO3, was obtained via a tandem asymmetric Michael addition–elimination reaction of (5S)-3,4-dichloro-5-(l-menthyloxy)-2(5H)-furanone and diallylamine in the presence of potassium fluoride. The molecular structure contains an approximately planar five-membered furanone ring [maximum atomic deviation = 0.0221 (3) Å] and a six-membered ring adopting a chair conformation
Localization of gauge field by non-minimal coupling with gravity
In this paper, we investigate the localization of the gauge field on
Randall-Sundrum-like braneworld models. The localization of the gauge
field is important because it plays a fundamental role in the branworld
theories. To achieve the localization, we propose a novel action with a
non-minimal coupling between the gauge field and gravity. We find that
the mass spectrum of the gauge field is continuous, without any gap between the
zero-mass mode and the massive modes, and except for the zero-mass mode all the
massive modes are not localized on the brane. Furthermore, the massive modes
have negative squared masses, indicating they are tachyonic. Our analysis can
be applied to a wide range of thin and thick braneworld scenarios, provided
that the five-dimensional spacetime is asymptotically anti-de Sitter.Comment: 10 pages, 2 figures, Accepted by JCA
Exploiting Diverse Characteristics and Adversarial Ambivalence for Domain Adaptive Segmentation
Adapting semantic segmentation models to new domains is an important but
challenging problem. Recently enlightening progress has been made, but the
performance of existing methods are unsatisfactory on real datasets where the
new target domain comprises of heterogeneous sub-domains (e.g., diverse weather
characteristics). We point out that carefully reasoning about the multiple
modalities in the target domain can improve the robustness of adaptation
models. To this end, we propose a condition-guided adaptation framework that is
empowered by a special attentive progressive adversarial training (APAT)
mechanism and a novel self-training policy. The APAT strategy progressively
performs condition-specific alignment and attentive global feature matching.
The new self-training scheme exploits the adversarial ambivalences of easy and
hard adaptation regions and the correlations among target sub-domains
effectively. We evaluate our method (DCAA) on various adaptation scenarios
where the target images vary in weather conditions. The comparisons against
baselines and the state-of-the-art approaches demonstrate the superiority of
DCAA over the competitors.Comment: Accepted to AAAI 202
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