604 research outputs found
Development of novel electrolyte materials for a new generation of low-temperature SOFCs
Issued as final reportNissan Motor
trans-4,5-DihydrÂoxy-1,3-diphenylÂimidazolidine-2-thione
In the title compound, C15H14N2O2S, the five-membered ring adopts an envelope conformation and the two hydrÂoxy groups lie on opposite sides of the ring. The six-membered rings are oriented at a dihedral angle of 22.63 (3)°. In the crystal structure, interÂmolecular O—H⋯S and O—H⋯O hydrogen bonds link the molÂecules into a two-dimensional network
NegVSR: Augmenting Negatives for Generalized Noise Modeling in Real-World Video Super-Resolution
The capability of video super-resolution (VSR) to synthesize high-resolution
(HR) video from ideal datasets has been demonstrated in many works. However,
applying the VSR model to real-world video with unknown and complex degradation
remains a challenging task. First, existing degradation metrics in most VSR
methods are not able to effectively simulate real-world noise and blur. On the
contrary, simple combinations of classical degradation are used for real-world
noise modeling, which led to the VSR model often being violated by
out-of-distribution noise. Second, many SR models focus on noise simulation and
transfer. Nevertheless, the sampled noise is monotonous and limited. To address
the aforementioned problems, we propose a Negatives augmentation strategy for
generalized noise modeling in Video Super-Resolution (NegVSR) task.
Specifically, we first propose sequential noise generation toward real-world
data to extract practical noise sequences. Then, the degeneration domain is
widely expanded by negative augmentation to build up various yet challenging
real-world noise sets. We further propose the augmented negative guidance loss
to learn robust features among augmented negatives effectively. Extensive
experiments on real-world datasets (e.g., VideoLQ and FLIR) show that our
method outperforms state-of-the-art methods with clear margins, especially in
visual quality
New Metabolites From the Co-culture of Marine-Derived Actinomycete Streptomyces rochei MB037 and Fungus Rhinocladiella similis 35
Co-culture of different microbes simulating the natural state of microbial community may produce potentially new compounds because of nutrition or space competition. To mine its metabolic potential in depth, co-culture of Streptomyces rochei MB037 with a gorgonian-derived fungus Rhinocladiella similis 35 was carried out to stimulate the production of new metabolites in this study, using pure cultivation as control. Five metabolites were isolated successfully from co-culture broth, including two new fatty acids with rare nitrile group, borrelidins J and K (1 and 2), one chromone derivative as a new natural product, 7-methoxy-2,3-dimethylchromone-4-one (3), together with two known 18-membered macrolides, borrelidin (4) and borrelidin F (5). The structures of 1–3 were elucidated by using a combination of NMR and MS spectroscopy, ester hydrolysis, and optical rotation methods. Interestingly, 1 and 2 were obtained only in co-culture. Though 3 was gained from either co-culture or single culture, its production was increased significantly by co-culture. Compound 1 exhibited significant antibacterial activity against methicillin-resistant Staphylococcus aureus with a MIC value of 0.195 μg/mL
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