834 research outputs found
Characterization of a RS-LiDAR for 3D Perception
High precision 3D LiDARs are still expensive and hard to acquire. This paper
presents the characteristics of RS-LiDAR, a model of low-cost LiDAR with
sufficient supplies, in comparison with VLP-16. The paper also provides a set
of evaluations to analyze the characterizations and performances of LiDARs
sensors. This work analyzes multiple properties, such as drift effects,
distance effects, color effects and sensor orientation effects, in the context
of 3D perception. By comparing with Velodyne LiDAR, we found RS-LiDAR as a
cheaper and acquirable substitute of VLP-16 with similar efficiency.Comment: For ICRA201
Pulse shape discrimination based on the Tempotron: a powerful classifier on GPU
This study introduces the Tempotron, a powerful classifier based on a
third-generation neural network model, for pulse shape discrimination. By
eliminating the need for manual feature extraction, the Tempotron model can
process pulse signals directly, generating discrimination results based on
learned prior knowledge. The study performed experiments using GPU
acceleration, resulting in over a 500 times speedup compared to the CPU-based
model, and investigated the impact of noise augmentation on the Tempotron's
performance. Experimental results showed that the Tempotron is a potent
classifier capable of achieving high discrimination accuracy. Furthermore,
analyzing the neural activity of Tempotron during training shed light on its
learning characteristics and aided in selecting the Tempotron's
hyperparameters. The dataset used in this study and the source code of the
GPU-based Tempotron are publicly available on GitHub at
https://github.com/HaoranLiu507/TempotronGPU.Comment: 14 pages,7 figure
Production of and in decays as and molecules
The molecular nature of and have been
extensively studied from the perspective of their masses, decay properties, and
production rates. In this work, we study the weak decays of and by
invoking triangle diagrams where the meson first decays weakly into
and (), and then the
and are dynamically generated by the
final-state interactions of and via
exchanges of and mesons. The obtained absolute branching
fractions of Br are in reasonable
agreement with the experimental data, while the branching fractions of Br are smaller than the experimental central
values by almost a factor of two to three. We tentatively attribute such a
discrepancy to either reaction mechanisms missing in the present work or the
likely existence of a relatively larger component in the
wave function.Comment: 17 pages, 4 figure
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