Search Results for author: Jian Cheng Wong

Found 12 papers, 1 papers with code

Generalizable Neural Physics Solvers by Baldwinian Evolution

1 code implementation6 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.

Meta-Learning

LSA-PINN: Linear Boundary Connectivity Loss for Solving PDEs on Complex Geometry

no code implementations3 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.

Graph Neural Network Based Surrogate Model of Physics Simulations for Geometry Design

no code implementations1 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.

Neuroevolution of Physics-Informed Neural Nets: Benchmark Problems and Comparative Results

no code implementations15 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.

Evolutionary Algorithms

Design of Turing Systems with Physics-Informed Neural Networks

no code implementations24 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.

Robustness of Physics-Informed Neural Networks to Noise in Sensor Data

no code implementations22 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.

FastFlow: AI for Fast Urban Wind Velocity Prediction

no code implementations22 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.

CAN-PINN: A Fast Physics-Informed Neural Network Based on Coupled-Automatic-Numerical Differentiation Method

no code implementations29 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.

Learning in Sinusoidal Spaces with Physics-Informed Neural Networks

no code implementations20 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.

Improved Surrogate Modeling of Fluid Dynamics with Physics-Informed Neural Networks

no code implementations5 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.

Can Transfer Neuroevolution Tractably Solve Your Differential Equations?

no code implementations6 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.

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