← Search

Fenia Christopoulou

5 accepted papers

2025

Human-inspired Episodic Memory for Infinite Context LLMs

ICLR 2025poster

Large language models (LLMs) have shown remarkable capabilities, but still struggle with processing extensive contexts, limiting their ability to maintain coherence and accuracy over long sequences. In contrast, the human brain excels at organising and retrieving episodic experiences across vast tem…

Cited by 0SourcePDFScholar
2025

SparsePO: Controlling Preference Alignment of LLMs via Sparse Token Masks

EMNLP 2025

Direct alignment algorithms have proven an effective step for aligning language models to human-desired behaviors. Current variants of the Direct Preference Optimization objective have focused on a strict setting where all tokens are contributing signals of KL divergence and rewards to the loss func

Cited by 0SourcePDFScholar
2022

EntityCS: Improving Zero-Shot Cross-lingual Transfer with Entity-Centric Code Switching

EMNLP 2022finding

Accurate alignment between languages is fundamental for improving cross-lingual pre-trained language models (XLMs). Motivated by the natural phenomenon of code-switching (CS) in multilingual speakers, CS has been used as an effective data augmentation method that offers language alignment at word- o…

Cited by 10SourcePDFScholar
2022

Training Dynamics for Curriculum Learning: A Study on Monolingual and Cross-lingual NLU

EMNLP 2022main

Curriculum Learning (CL) is a technique of training models via ranking examples in a typically increasing difficulty trend with the aim of accelerating convergence and improving generalisability. Current approaches for Natural Language Understanding (NLU) tasks use CL to improve in-distribution data…

2021

Distantly Supervised Relation Extraction with Sentence Reconstruction and Knowledge Base Priors

NAACL 2021long

We propose a multi-task, probabilistic approach to facilitate distantly supervised relation extraction by bringing closer the representations of sentences that contain the same Knowledge Base pairs. To achieve this, we bias the latent space of sentences via a Variational Autoencoder (VAE) that is tr…

Cited by 27SourcePDFScholar