13,689 research outputs found
Approaching the Intrinsic Bandgap in Suspended High-Mobility Graphene Nanoribbons
We report electrical transport measurements on a suspended ultra-low-disorder
graphene nanoribbon(GNR) with nearly atomically smooth edges that reveal a high
mobility exceeding 3000 cm2 V-1 s-1 and an intrinsic band gap. The
experimentally derived bandgap is in quantitative agreement with the results of
our electronic-structure calculations on chiral GNRs with comparable width
taking into account the electron-electron interactions, indicating that the
origin of the bandgap in non-armchair GNRs is partially due to the magnetic
zigzag edges.Comment: 22 pages, 6 figure
S4Net: Single Stage Salient-Instance Segmentation
We consider an interesting problem-salient instance segmentation in this
paper. Other than producing bounding boxes, our network also outputs
high-quality instance-level segments. Taking into account the
category-independent property of each target, we design a single stage salient
instance segmentation framework, with a novel segmentation branch. Our new
branch regards not only local context inside each detection window but also its
surrounding context, enabling us to distinguish the instances in the same scope
even with obstruction. Our network is end-to-end trainable and runs at a fast
speed (40 fps when processing an image with resolution 320x320). We evaluate
our approach on a publicly available benchmark and show that it outperforms
other alternative solutions. We also provide a thorough analysis of the design
choices to help readers better understand the functions of each part of our
network. The source code can be found at
\url{https://github.com/RuochenFan/S4Net}
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