Results 11 to 20 of about 13,955,013 (337)
Wise-IoU: Bounding Box Regression Loss with Dynamic Focusing Mechanism [PDF]
arXiv.org, 2023 The loss function for bounding box regression (BBR) is essential to object detection. Its good definition will bring significant performance improvement to the model.
Zanjia Tong +3 more
semanticscholar +1 more source
Beam Focusing for Near-Field Multi-User MIMO Communications [PDF]
IEEE Transactions on Wireless Communications, 2021 Large antenna arrays and high-frequency bands are two key features of future wireless communication systems. The combination of large-scale antennas with high transmission frequencies often results in the communicating devices operating in the near-field
Haiyang Zhang +5 more
semanticscholar +1 more source
Meta-optics achieves RGB-achromatic focusing for virtual reality
Science Advances, 2021 A large dispersion-engineered metalens achieves multicolor focusing and opens a path to a future virtual reality platform. Virtual and augmented realities are rapidly developing technologies, but their large-scale penetration will require lightweight ...
Zhaoyi Li +8 more
semanticscholar +1 more source
An overview of deep learning in medical imaging focusing on MRI [PDF]
Zeitschrift für Medizinische Physik, 2018 What has happened in machine learning lately, and what does it mean for the future of medical image analysis? Machine learning has witnessed a tremendous amount of attention over the last few years.
A. Lundervold, A. Lundervold
semanticscholar +1 more source
Cavitation erosion by shockwave self-focusing of a single bubble
Ultrasonics sonochemistry, 2022 Highlights • An intensified collapse by self-focusing of shockwaves emitted during the collapse is proposed as main mechanism of cavitation erosion of hard materials.• Cavitation erosion occurs only for bubble collapses at close stand-off below γ≲0.2 ...
F. Reuter, C. Deiter, C. Ohl
semanticscholar +1 more source
Focusing on Bandwidth: Achromatic Metalens Limits [PDF]
Conference on Lasers and Electro-Optics, 2020 We derive fundamental bandwidth limits on achromatic optical metalenses, regardless of their implementation. Specifically, we discuss the product between achievable time delay and bandwidth, and apply well-established bounds on this product to a general ...
F. Presutti, F. Monticone
semanticscholar +1 more source
Focusing Attention: Towards Accurate Text Recognition in Natural Images [PDF]
IEEE International Conference on Computer Vision, 2017 Scene text recognition has been a hot research topic in computer vision due to its various applications. The state of the art is the attention-based encoder-decoder framework that learns the mapping between input images and output sequences in a purely ...
Zhanzhan Cheng +5 more
semanticscholar +1 more source
A Tunable Zig-Zag Reflective Elastic Metasurface
Crystals, 2022 In this paper, inspired by origami structures, we offer a very simple tuning method to overcome the limitations of general elastic metasurfaces, where only a certain functionality at a certain frequency range can be achieved, by designing a reflective ...
Zhu-Long Xu +3 more
doaj +1 more source
A Novel Approach on Microwave Hyperthermia
Diagnostics, 2021 Microwave hyperthermia (MH) requires the selective focusing of microwave energy on the targeted region while minimally affecting the healthy tissue. Emerging from the simple nature of the linear antenna arrays, this work demonstrates focusing maps as an ...
Gulsah Altintas +3 more
doaj +1 more source
Focusing in Asynchronous Games [PDF]
, 2010 Game semantics provides an interactive point of view on proofs, which enables one to describe precisely their dynamical behavior during cut elimination, by considering formulas as games on which proofs induce strategies.
D.R. Ghica +13 more
core +4 more sources