3 research outputs found
MAE-GEBD:Winning the CVPR'2023 LOVEU-GEBD Challenge
The Generic Event Boundary Detection (GEBD) task aims to build a model for
segmenting videos into segments by detecting general event boundaries
applicable to various classes. In this paper, based on last year's MAE-GEBD
method, we have improved our model performance on the GEBD task by adjusting
the data processing strategy and loss function. Based on last year's approach,
we extended the application of pseudo-label to a larger dataset and made many
experimental attempts. In addition, we applied focal loss to concentrate more
on difficult samples and improved our model performance. Finally, we improved
the segmentation alignment strategy used last year, and dynamically adjusted
the segmentation alignment method according to the boundary density and
duration of the video, so that our model can be more flexible and fully
applicable in different situations. With our method, we achieve an F1 score of
86.03% on the Kinetics-GEBD test set, which is a 0.09% improvement in the F1
score compared to our 2022 Kinetics-GEBD method.Comment: Winner of CVPR2023 LOVEU GEBD Challeng
CVPR 2023 Text Guided Video Editing Competition
Humans watch more than a billion hours of video per day. Most of this video
was edited manually, which is a tedious process. However, AI-enabled
video-generation and video-editing is on the rise. Building on text-to-image
models like Stable Diffusion and Imagen, generative AI has improved
dramatically on video tasks. But it's hard to evaluate progress in these video
tasks because there is no standard benchmark. So, we propose a new dataset for
text-guided video editing (TGVE), and we run a competition at CVPR to evaluate
models on our TGVE dataset. In this paper we present a retrospective on the
competition and describe the winning method. The competition dataset is
available at https://sites.google.com/view/loveucvpr23/track4.Comment: Project page: https://sites.google.com/view/loveucvpr23/track
High-efficiency electrocatalyst for N2 conversion to NH3 based on Au nanoparticles loaded on defective WO3x
In this work, Au nanoparticles (NPs) grown on defective WO3-x (Au/WO3-x) show superior electrocatalytic N2 reduction activity under ambient conditions in 0.1 M KOH. At -0.2 V versus the reversible hydrogen electrode (vs. RHE), the Au/WO3-x catalyst achieves a large NH3 yield of 23.15 μg h-1 mg-1 and a high faradaic efficiency (FE) of 14.72%. Further density functional theory (DFT) calculations indicate that electron transfer between the Au nanoparticles and defective WO3-x promotes the activation of N2 molecules effectively