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Xia Song

24 accepted papers

2025

A Practical Analysis of Human Alignment with *PO

NAACL 2025findings

At the forefront of state-of-the-art human alignment methods are preference optimization methods (*PO). Prior research has often concentrated on identifying the best-performing method, typically involving a grid search over hyperparameters, which can be impractical for general practitioners. In this…

Cited by 0SourcePDFScholar
2025

GenTool: Enhancing Tool Generalization in Language Models through Zero-to-One and Weak-to-Strong Simulation

ACL 2025finding

Large Language Models (LLMs) can enhance their capabilities as AI assistants by integrating external tools, allowing them to access a wider range of information. While recent LLMs are typically fine-tuned with tool usage examples during supervised fine-tuning (SFT), questions remain about their abil…

Cited by 0SourcePDFScholar
2025

POROver: Improving Safety and Reducing Overrefusal in Large Language Models with Overgeneration and Preference Optimization

ICML 2025poster

Achieving both high safety and high usefulness simultaneously in large language models has become a critical challenge in recent years. Models often exhibit unsafe behavior or adopt an overly cautious approach leading to frequent overrefusal of benign prompts, which reduces their usefulness. A majo…

Cited by 1SourcePDFScholar
2025

Scaling Laws for Multilingual Language Models

ACL 2025finding

We propose a novel scaling law for general-purpose decoder-only language models (LMs) trained on multilingual data, tackling the problem of balancing languages during multilingual pretraining. A primary challenge in studying multilingual scaling is the difficulty of analyzing individual language per…

2024

Interpretable User Satisfaction Estimation for Conversational Systems with Large Language Models

ACL 2024long

Accurate and interpretable user satisfaction estimation (USE) is critical for understanding, evaluating, and continuously improving conversational systems. Users express their satisfaction or dissatisfaction with diverse conversational patterns in both general-purpose (ChatGPT and Bing Copilot) and…

2024

On the Adaptation of Unlimiformer for Decoder-Only Transformers

COLING 2024main

One of the prominent issues stifling the current generation of large language models is their limited context length. Recent proprietary models such as GPT-4 and Claude 2 have introduced longer context lengths, 8k/32k and 100k, respectively; however, despite the efforts in the community, most common…

2023

A Length-Extrapolatable Transformer

ACL 2023long

Position modeling plays a critical role in Transformers. In this paper, we focus on length extrapolation, i.e., training on short texts while evaluating longer sequences. We define attention resolution as an indicator of extrapolation. Then we propose two designs to improve the above metric of Trans…

2023

Beyond English-Centric Bitexts for Better Multilingual Language Representation Learning

ACL 2023long

In this paper, we elaborate upon recipes for building multilingual representation models that are not only competitive with existing state-of-the-art models but are also more parameter efficient, thereby promoting better adoption in resource-constrained scenarios and practical applications. We show…

Cited by 19SourcePDFScholar
2023

Language Is Not All You Need: Aligning Perception with Language Models

NeurIPS 2023poster

A big convergence of language, multimodal perception, action, and world modeling is a key step toward artificial general intelligence. In this work, we introduce KOSMOS-1, a Multimodal Large Language Model (MLLM) that can perceive general modalities, learn in context (i.e., few-shot), and follow ins…

2023

Magneto: A Foundation Transformer

ICML 2023poster

A big convergence of model architectures across language, vision, speech, and multimodal is emerging. However, under the same name ''Transformers'', the above areas use different implementations for better performance, e.g., Post-LayerNorm for BERT, and Pre-LayerNorm for GPT and vision Transformers.…

Cited by 12SourcePDFScholar
2023

Model-Generated Pretraining Signals Improves Zero-Shot Generalization of Text-to-Text Transformers

ACL 2023long

This paper explores the effectiveness of model-generated signals in improving zero-shot generalization of text-to-text Transformers such as T5. We study various designs to pretrain T5 using an auxiliary model to construct more challenging token replacements for the main model to denoise. Key aspects…

2022

On the Representation Collapse of Sparse Mixture of Experts

NeurIPS 2022accept

Sparse mixture of experts provides larger model capacity while requiring a constant computational overhead. It employs the routing mechanism to distribute input tokens to the best-matched experts according to their hidden representations. However, learning such a routing mechanism encourages token c…

2022

Pretraining Text Encoders with Adversarial Mixture of Training Signal Generators

ICLR 2022poster

We present a new framework AMOS that pretrains text encoders with an Adversarial learning curriculum via a Mixture Of Signals from multiple auxiliary generators. Following ELECTRA-style pretraining, the main encoder is trained as a discriminator to detect replaced tokens generated by auxiliary maske…

2022

XLM-E: Cross-lingual Language Model Pre-training via ELECTRA

ACL 2022long

In this paper, we introduce ELECTRA-style tasks to cross-lingual language model pre-training. Specifically, we present two pre-training tasks, namely multilingual replaced token detection, and translation replaced token detection. Besides, we pretrain the model, named as XLM-E, on both multilingual…

2021

Allocating Large Vocabulary Capacity for Cross-Lingual Language Model Pre-Training

EMNLP 2021main

Compared to monolingual models, cross-lingual models usually require a more expressive vocabulary to represent all languages adequately. We find that many languages are under-represented in recent cross-lingual language models due to the limited vocabulary capacity. To this end, we propose an algori…

2021

COCO-LM: Correcting and Contrasting Text Sequences for Language Model Pretraining

NeurIPS 2021poster

We present a self-supervised learning framework, COCO-LM, that pretrains Language Models by COrrecting and COntrasting corrupted text sequences. Following ELECTRA-style pretraining, COCO-LM employs an auxiliary language model to corrupt text sequences, upon which it constructs two new tasks for pret…

2021

Consistency Regularization for Cross-Lingual Fine-Tuning

ACL 2021long

Fine-tuning pre-trained cross-lingual language models can transfer task-specific supervision from one language to the others. In this work, we propose to improve cross-lingual fine-tuning with consistency regularization. Specifically, we use example consistency regularization to penalize the predict…

2021

InfoXLM: An Information-Theoretic Framework for Cross-Lingual Language Model Pre-Training

NAACL 2021long

In this work, we present an information-theoretic framework that formulates cross-lingual language model pre-training as maximizing mutual information between multilingual-multi-granularity texts. The unified view helps us to better understand the existing methods for learning cross-lingual represen…

Cited by 371SourcePDFScholar
2021

Language Scaling for Universal Suggested Replies Model

NAACL 2021industry

We consider the problem of scaling automated suggested replies for a commercial email application to multiple languages. Faced with increased compute requirements and low language resources for language expansion, we build a single universal model for improving the quality and reducing run-time cost…

Cited by 2SourcePDFScholar
2021

mT6: Multilingual Pretrained Text-to-Text Transformer with Translation Pairs

EMNLP 2021main

Multilingual T5 pretrains a sequence-to-sequence model on massive monolingual texts, which has shown promising results on many cross-lingual tasks. In this paper, we improve multilingual text-to-text transfer Transformer with translation pairs (mT6). Specifically, we explore three cross-lingual text…

2020

Pushing the Limits of Narrow Precision Inferencing at Cloud Scale with Microsoft Floating Point

NeurIPS 2020poster

In this paper, we explore the limits of Microsoft Floating Point (MSFP), a new class of datatypes developed for production cloud-scale inferencing on custom hardware. Through the co-evolution of hardware design and algorithms, MSFP achieves accuracy comparable to or better than industry standards Bf…

2020

Transformer-XH: Multi-Evidence Reasoning with eXtra Hop Attention

ICLR 2020poster

Transformers have achieved new heights modeling natural language as a sequence of text tokens. However, in many real world scenarios, textual data inherently exhibits structures beyond a linear sequence such as trees and graphs; many tasks require reasoning with evidence scattered across multiple pi…

Cited by 132SourcecodeScholar