666 research outputs found
Exploring the Impacts of Virtual Role Identification on Knowledge Sharing in Virtual Communities: A Perspective of Structural Symbolic Interactionism
Use of brGDGTs in surface geochemical exploration for petroleum-A case study of oil and gas fields in the Jiyang depression
Quench dynamics of Rydberg-dressed bosons on two-dimensional square lattices
We study dynamics of bosonic atoms on a two dimensional square lattice, where atomic interactions are long ranged with either a box or soft-core shape. The latter can be realized through laser dressing ground state atoms to electronically excited Rydberg states. When the range of interactions is equal or larger than the lattice constant, the system is governed by an extended Bose-Hubbard model. We propose a quench process by varying the atomic hopping linearly across phase boundaries of the Mott insulator-supersolid and supersolid-superfluid phases. Starting from a Mott insulator state, dynamical evolution exhibits a universal behaviour at the early stage. We numerically find that the universality is largely independent of interactions during this stage. However, dynamical evolution could be significantly altered by long-range interactions at later times. We demonstrate that density wave excitations are important below a critical quench rate, where non-universal dynamics is found. We also show that the quench dynamics can be analysed through time-of-flight images, i.e. measuring the momentum distribution and noise correlations
MFMAN-YOLO: A Method for Detecting Pole-like Obstacles in Complex Environment
In real-world traffic, there are various uncertainties and complexities in
road and weather conditions. To solve the problem that the feature information
of pole-like obstacles in complex environments is easily lost, resulting in low
detection accuracy and low real-time performance, a multi-scale hybrid
attention mechanism detection algorithm is proposed in this paper. First, the
optimal transport function Monge-Kantorovich (MK) is incorporated not only to
solve the problem of overlapping multiple prediction frames with optimal
matching but also the MK function can be regularized to prevent model
over-fitting; then, the features at different scales are up-sampled separately
according to the optimized efficient multi-scale feature pyramid. Finally, the
extraction of multi-scale feature space channel information is enhanced in
complex environments based on the hybrid attention mechanism, which suppresses
the irrelevant complex environment background information and focuses the
feature information of pole-like obstacles. Meanwhile, this paper conducts real
road test experiments in a variety of complex environments. The experimental
results show that the detection precision, recall, and average precision of the
method are 94.7%, 93.1%, and 97.4%, respectively, and the detection frame rate
is 400 f/s. This research method can detect pole-like obstacles in a complex
road environment in real time and accurately, which further promotes innovation
and progress in the field of automatic driving.Comment: 11 page
CORE: Cooperative Reconstruction for Multi-Agent Perception
This paper presents CORE, a conceptually simple, effective and
communication-efficient model for multi-agent cooperative perception. It
addresses the task from a novel perspective of cooperative reconstruction,
based on two key insights: 1) cooperating agents together provide a more
holistic observation of the environment, and 2) the holistic observation can
serve as valuable supervision to explicitly guide the model learning how to
reconstruct the ideal observation based on collaboration. CORE instantiates the
idea with three major components: a compressor for each agent to create more
compact feature representation for efficient broadcasting, a lightweight
attentive collaboration component for cross-agent message aggregation, and a
reconstruction module to reconstruct the observation based on aggregated
feature representations. This learning-to-reconstruct idea is task-agnostic,
and offers clear and reasonable supervision to inspire more effective
collaboration, eventually promoting perception tasks. We validate CORE on
OPV2V, a large-scale multi-agent percetion dataset, in two tasks, i.e., 3D
object detection and semantic segmentation. Results demonstrate that the model
achieves state-of-the-art performance on both tasks, and is more
communication-efficient.Comment: Accepted to ICCV 2023; Code: https://github.com/zllxot/COR
Suilysin remodels the cytoskeletons of human brain microvascular endothelial cells by activating RhoA and Rac1 GTPase
A modified VMAT adaptive radiotherapy for nasopharyngeal cancer patients based on CT-CT image fusion
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