Search Results for author: Abdul Fatir Ansari

Found 12 papers, 9 papers with code

Hard Constraint Guided Flow Matching for Gradient-Free Generation of PDE Solutions

no code implementations2 Dec 2024 Chaoran Cheng, Boran Han, Danielle C. Maddix, Abdul Fatir Ansari, Andrew Stuart, Michael W. Mahoney, Yuyang Wang

Generative models that satisfy hard constraints are crucial in many scientific and engineering applications where physical laws or system requirements must be strictly respected.

Comparing and Contrasting Deep Learning Weather Prediction Backbones on Navier-Stokes and Atmospheric Dynamics

1 code implementation19 Jul 2024 Matthias Karlbauer, Danielle C. Maddix, Abdul Fatir Ansari, Boran Han, Gaurav Gupta, Yuyang Wang, Andrew Stuart, Michael W. Mahoney

Remarkable progress in the development of Deep Learning Weather Prediction (DLWP) models positions them to become competitive with traditional numerical weather prediction (NWP) models.

Graph Neural Network Weather Forecasting

Generative Modeling with Flow-Guided Density Ratio Learning

2 code implementations7 Mar 2023 Alvin Heng, Abdul Fatir Ansari, Harold Soh

We present Flow-Guided Density Ratio Learning (FDRL), a simple and scalable approach to generative modeling which builds on the stale (time-independent) approximation of the gradient flow of entropy-regularized f-divergences introduced in recent work.

Image-to-Image Translation

Neural Continuous-Discrete State Space Models for Irregularly-Sampled Time Series

1 code implementation26 Jan 2023 Abdul Fatir Ansari, Alvin Heng, Andre Lim, Harold Soh

Learning accurate predictive models of real-world dynamic phenomena (e. g., climate, biological) remains a challenging task.

Bayesian Inference Imputation +3

Deep Explicit Duration Switching Models for Time Series

1 code implementation NeurIPS 2021 Abdul Fatir Ansari, Konstantinos Benidis, Richard Kurle, Ali Caner Turkmen, Harold Soh, Alexander J. Smola, Yuyang Wang, Tim Januschowski

We propose the Recurrent Explicit Duration Switching Dynamical System (RED-SDS), a flexible model that is capable of identifying both state- and time-dependent switching dynamics.

Time Series Time Series Analysis

Refining Deep Generative Models via Discriminator Gradient Flow

1 code implementation ICLR 2021 Abdul Fatir Ansari, Ming Liang Ang, Harold Soh

We introduce Discriminator Gradient flow (DGflow), a new technique that improves generated samples via the gradient flow of entropy-regularized f-divergences between the real and the generated data distributions.

Image Generation Text Generation

A Characteristic Function Approach to Deep Implicit Generative Modeling

1 code implementation CVPR 2020 Abdul Fatir Ansari, Jonathan Scarlett, Harold Soh

In this paper, we formulate the problem of learning an IGM as minimizing the expected distance between characteristic functions.

Image Generation

Hyperprior Induced Unsupervised Disentanglement of Latent Representations

2 code implementations12 Sep 2018 Abdul Fatir Ansari, Harold Soh

We address the problem of unsupervised disentanglement of latent representations learnt via deep generative models.

Disentanglement

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