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8 results on '"Li, Bing Huan"'

1. Multiple Case Physics-Informed Neural Network for Biomedical Tube Flows

Author

Wong, Hong Shen, Chan, Wei Xuan, Li, Bing Huan, and Yap, Choon Hwai

Subjects
Physics - Fluid Dynamics, Computer Science - Machine Learning
Abstract

Fluid dynamics computations for tube-like geometries are important for biomedical evaluation of vascular and airway fluid dynamics. Physics-Informed Neural Networks (PINNs) have recently emerged as a good alternative to traditional computational fluid dynamics (CFD) methods. The vanilla PINN, however, requires much longer training time than the traditional CFD methods for each specific flow scenario and thus does not justify its mainstream use. Here, we explore the use of the multi-case PINN approach for calculating biomedical tube flows, where varied geometry cases are parameterized and pre-trained on the PINN, such that results for unseen geometries can be obtained in real time. Our objective is to identify network architecture, tube-specific, and regularization strategies that can optimize this, via experiments on a series of idealized 2D stenotic tube flows., Comment: 24 pages, 8 figures, 5 tables

Published
2023

7. Particle-number conserving analysis for the 2-quasiparticle and high- K multi-quasiparticle states in doubly-odd 174,176 Lu

Author

Lei Yi-An, Zhang Zhen-Hua, and Li Bing-Huan

Subjects
Physics, Nuclear and High Energy Physics, Nuclear Theory, Proton, FOS: Physical sciences, Astronomy and Astrophysics, Moment of inertia, Omega, Nuclear Theory (nucl-th), Pairing, Excited state, Quasiparticle, Neutron, Atomic physics, Nucleon, Instrumentation
Abstract

Two-quasiparticle bands and low-lying excited high-$K$ four-, six-, and eight-quasiparticle bands in the doubly-odd ${}^{174, 176}$Lu are analyzed by using the cranked shell model (CSM) with the pairing correlations treated by a particle-number conserving (PNC) method, in which the blocking effects are taken into account exactly. The proton and neutron Nilsson level schemes for ${}^{174, 176}$Lu are taken from the adjacent odd-$A$ Lu and Hf isotopes, which are adopted to reproduce the experimental bandhead energies of the one-quasiproton and one-quasineutron bands of these odd-$A$ Lu and Hf nuclei, respectively. Once the quasiparticle configurations are determined, the experimental bandhead energies and the moments of inertia of these two- and multi-quasiparticle bands are well reproduced by PNC-CSM calculations. The Coriolis mixing of the low-$K$ ($K=|\Omega_1-\Omega_2|$) two-quasiparticle band of the Gallagher-Moszkowski doublet with one nucleon in the $\Omega = 1/2$ orbital is analyzed., Comment: 8 pages, 5 figures, 2 tables, to be published at Chinese Physics C

Published
2013

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