no code implementations • 18 Apr 2024 • Joyjit Chattoraj, Jian Cheng Wong, Zhang Zexuan, Manna Dai, Xia Yingzhi, Li Jichao, Xu Xinxing, Ooi Chin Chun, Yang Feng, Dao My Ha, Liu Yong
In the realm of aerospace design, achieving smooth curves is paramount, particularly when crafting objects such as airfoils.
1 code implementation • 6 Dec 2023 • Jian Cheng Wong, Chin Chun Ooi, Abhishek Gupta, Pao-Hsiung Chiu, Joshua Shao Zheng Low, My Ha Dao, Yew-Soon Ong
Physics-informed neural networks (PINNs) are at the forefront of scientific machine learning, making possible the creation of machine intelligence that is cognizant of physical laws and able to accurately simulate them.
no code implementations • 3 Feb 2023 • Jian Cheng Wong, Pao-Hsiung Chiu, Chinchun Ooi, My Ha Dao, Yew-Soon Ong
On the other hand, if the samples are too sparse, existing PINNs tend to overfit the near boundary region, leading to incorrect solution.
no code implementations • 1 Feb 2023 • Jian Cheng Wong, Chin Chun Ooi, Joyjit Chattoraj, Lucas Lestandi, Guoying Dong, Umesh Kizhakkinan, David William Rosen, Mark Hyunpong Jhon, My Ha Dao
Computational Intelligence (CI) techniques have shown great potential as a surrogate model of expensive physics simulation, with demonstrated ability to make fast predictions, albeit at the expense of accuracy in some cases.
no code implementations • 15 Dec 2022 • Nicholas Sung Wei Yong, Jian Cheng Wong, Pao-Hsiung Chiu, Abhishek Gupta, Chinchun Ooi, Yew-Soon Ong
Hence, neuroevolution algorithms, with their superior global search capacity, may be a better choice for PINNs relative to gradient descent methods.
no code implementations • 24 Nov 2022 • Jordon Kho, Winston Koh, Jian Cheng Wong, Pao-Hsiung Chiu, Chin Chun Ooi
Thus, we investigate the use of physics-informed neural networks as a tool to infer key parameters in reaction-diffusion systems in the steady-state for scientific discovery or design.
no code implementations • 22 Nov 2022 • Jian Cheng Wong, Pao-Hsiung Chiu, Chin Chun Ooi, My Ha Da
Physics-Informed Neural Networks (PINNs) have been shown to be an effective way of incorporating physics-based domain knowledge into neural network models for many important real-world systems.
no code implementations • 22 Nov 2022 • Shi Jer Low, Venugopalan, S. G. Raghavan, Harish Gopalan, Jian Cheng Wong, Justin Yeoh, Chin Chun Ooi
Hence, it can be beneficial to urban planners to have a fast surrogate model to predict urban characteristics of a hypothetical layout, e. g. pedestrian-level wind velocity, without having to run computationally expensive and time-consuming high-fidelity numerical simulations.
no code implementations • 29 Oct 2021 • Pao-Hsiung Chiu, Jian Cheng Wong, Chinchun Ooi, My Ha Dao, Yew-Soon Ong
In this study, novel physics-informed neural network (PINN) methods for coupling neighboring support points and their derivative terms which are obtained by automatic differentiation (AD), are proposed to allow efficient training with improved accuracy.
no code implementations • 20 Sep 2021 • Jian Cheng Wong, Chinchun Ooi, Abhishek Gupta, Yew-Soon Ong
In this paper, we present a novel perspective of the merits of learning in sinusoidal spaces with PINNs.
no code implementations • 5 May 2021 • Jian Cheng Wong, Chinchun Ooi, Pao-Hsiung Chiu, My Ha Dao
In addition, we propose a novel transfer optimization scheme for use in such surrogate modeling scenarios and demonstrate an approximately 3x improvement in speed to convergence and an order of magnitude improvement in predictive performance over conventional Xavier initialization for training of new scenarios.
no code implementations • 6 Jan 2021 • Jian Cheng Wong, Abhishek Gupta, Yew-Soon Ong
In the context of solving differential equations, we are faced with the problem of finding globally optimum parameters of the network, instead of being concerned with out-of-sample generalization.