Search Results for author: Guoxuan Xia

Found 9 papers, 6 papers with code

Augmenting Softmax Information for Selective Classification with Out-of-Distribution Data

1 code implementation15 Jul 2022 Guoxuan Xia, Christos-Savvas Bouganis

However, the performance of detection methods is generally evaluated on the task in isolation, rather than also considering potential downstream tasks in tandem.

Out of Distribution (OOD) Detection

Window-Based Early-Exit Cascades for Uncertainty Estimation: When Deep Ensembles are More Efficient than Single Models

1 code implementation ICCV 2023 Guoxuan Xia, Christos-Savvas Bouganis

Experiments on ImageNet-scale data across a number of network architectures and uncertainty tasks show that the proposed window-based early-exit approach is able to achieve a superior uncertainty-computation trade-off compared to scaling single models.

Binary Classification

Latent Diffusion Model for DNA Sequence Generation

1 code implementation9 Oct 2023 Zehui Li, Yuhao Ni, Tim August B. Huygelen, Akashaditya Das, Guoxuan Xia, Guy-Bart Stan, Yiren Zhao

On the other hand, Diffusion Models are a promising new class of generative models that are not burdened with these problems, enabling them to reach the state-of-the-art in domains such as image generation.

Text Generation

Score Normalization for a Faster Diffusion Exponential Integrator Sampler

1 code implementation31 Oct 2023 Guoxuan Xia, Duolikun Danier, Ayan Das, Stathi Fotiadis, Farhang Nabiei, Ushnish Sengupta, Alberto Bernacchia

As a simple fix, we propose to instead reparameterise the score (at inference) by dividing it by the average absolute value of previous score estimates at that time step collected from offline high NFE generations.

An Underexplored Dilemma between Confidence and Calibration in Quantized Neural Networks

1 code implementation NeurIPS Workshop ICBINB 2021 Guoxuan Xia, Sangwon Ha, Tiago Azevedo, Partha Maji

We show that this robustness can be partially explained by the calibration behavior of modern CNNs, and may be improved with overconfidence.

Decision Making Quantization

On the Usefulness of Deep Ensemble Diversity for Out-of-Distribution Detection

1 code implementation15 Jul 2022 Guoxuan Xia, Christos-Savvas Bouganis

As such we show that practically, even better OOD detection performance can be achieved for Deep Ensembles by averaging task-specific detection scores such as Energy over the ensemble.

Binary Classification Out-of-Distribution Detection +2

DiscDiff: Latent Diffusion Model for DNA Sequence Generation

no code implementations8 Feb 2024 Zehui Li, Yuhao Ni, William A V Beardall, Guoxuan Xia, Akashaditya Das, Guy-Bart Stan, Yiren Zhao

This paper introduces a novel framework for DNA sequence generation, comprising two key components: DiscDiff, a Latent Diffusion Model (LDM) tailored for generating discrete DNA sequences, and Absorb-Escape, a post-training algorithm designed to refine these sequences.

Understanding Why Label Smoothing Degrades Selective Classification and How to Fix It

no code implementations19 Mar 2024 Guoxuan Xia, Olivier Laurent, Gianni Franchi, Christos-Savvas Bouganis

We first demonstrate empirically across a range of tasks and architectures that LS leads to a consistent degradation in SC.

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