Papers by Tianyi Bai

3 papers
Meta-rater: A Multi-dimensional Data Selection Method for Pre-training Language Models (2025.acl-long)

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Challenge: composition of pre-training datasets for large language models remains undisclosed . current methods for evaluating data quality are limited by single-dimensional evaluation or redundancy-focused strategies.
Approach: They propose a multi-dimensional data selection method that integrates dimensions with existing quality metrics through learned optimal weightings.
Outcome: The proposed method doubles convergence speed for 1.3B model models and improves downstream task performance by 3.23%.
Efficient Pretraining Data Selection for Language Models via Multi-Actor Collaboration (2025.acl-long)

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Challenge: Efficient data selection is crucial to accelerate the pretraining of language models . limited research has addressed the inherent conflicts between data selection methods .
Approach: They propose a multi-actor collaborative data selection mechanism that prioritizes data based on its specific criterion and updates prioritization rules using the current state of the model.
Outcome: The proposed model accelerates convergence in LM pretraining and achieves an average relative performance gain of 10.5% across multiple language model benchmarks.
From Completion to Editing: Unlocking Context-Aware Code Infilling via Search-and-Replace Instruction Tuning (2026.acl-long)

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Challenge: Fill-in-the-Middle (FIM) models suffer from performance degradation and prohibitive latency.
Approach: They propose a search-and-replace infilling framework that integrates agentic verification and editing into a single-pass inference process.
Outcome: The proposed framework harmonizes completion tasks with the instruction-following priors of Chat LLMs, extending the paradigm from static infilling to dynamic context-aware editing.

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