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Lexing Xie

9 accepted papers

2025

MoVa: Towards Generalizable Classification of Human Morals and Values

EMNLP 2025

Identifying human morals and values embedded in language is essential to empirical studies of communication. However, researchers often face substantial difficulty navigating the diversity of theoretical frameworks and data available for their analysis. Here, we contribute MoVa, a well-documented su

2024

Encoding Unitig-level Assembly Graphs with Heterophilous Constraints for Metagenomic Contigs Binning

ICLR 2024poster

Metagenomics studies genomic material derived from mixed microbial communities in diverse environments, holding considerable significance for both human health and environmental sustainability. Metagenomic binning refers to the clustering of genomic subsequences obtained from high-throughput DNA seq…

Cited by 2SourcePDFScholar
2024

Online Learning in Betting Markets: Profit versus Prediction

ICML 2024poster

We examine two types of binary betting markets, whose primary goal is for profit (such as sports gambling) or to gain information (such as prediction markets). We articulate the interplay between belief and price-setting to analyse both types of markets, and show that the goals of maximising bookmak…

Cited by 1SourcePDFScholar
2022

Fair Wrapping for Black-box Predictions

NeurIPS 2022accept

We introduce a new family of techniques to post-process (``wrap") a black-box classifier in order to reduce its bias. Our technique builds on the recent analysis of improper loss functions whose optimization can correct any twist in prediction, unfairness being treated as a twist. In the post-proces…

2021

UNIPoint: Universally Approximating Point Processes Intensities

AAAI 2021technical

Point processes are a useful mathematical tool for describing events over time, and so there are many recent approaches for representing and learning them. One notable open question is how to precisely describe the flexibility of point process models and whether there exists a general model that can…

2020

Quantile Propagation for Wasserstein-Approximate Gaussian Processes

NeurIPS 2020poster

Approximate inference techniques are the cornerstone of probabilistic methods based on Gaussian process priors. Despite this, most work approximately optimizes standard divergence measures such as the Kullback-Leibler (KL) divergence, which lack the basic desiderata for the task at hand, while chief…

2018

SemStyle: Learning to Generate Stylised Image Captions Using Unaligned Text

CVPR 2018poster

Linguistic style is an essential part of written communication, with the power to affect both clarity and attractiveness. With recent advances in vision and language, we can start to tackle the problem of generating image captions that are both visually grounded and appropriately styled. Existing ap…