Papers by Hao Luo

45 papers
AdaMix: Adaptive Mixing for Short and Long Reasoning Adapters (2026.acl-long)

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Challenge: Existing methods for large reasoning models have improved efficiency but still face limitations such as conflicting objectives and limited adaptability.
Approach: They propose an adaptive reasoning framework that applies a uniform, computation-intensive deep reasoning strategy to all problems.
Outcome: The proposed framework reduces the average response length of DeepSeek-R1-Distill-Qwen-7B by 54.9% while improving accuracy by up to 4.8% on five mathematical datasets.
MolCA: Molecular Graph-Language Modeling with Cross-Modal Projector and Uni-Modal Adapter (2023.emnlp-main)

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Challenge: Language Models (LMs) have demonstrated impressive molecule understanding ability on 1D text-related tasks, but lack 2D graph perception, a critical ability of human professionals in comprehending molecules’ topological structures.
Approach: They propose to combine a cross-modal projector and a uni-modal adapter to enable an LM to understand both text- and graph-based molecular contents via a Q-Former.
Outcome: The proposed model outperforms the baselines on tasks such as molecule captioning, IUPAC name prediction, and molecule-text retrieval.
Rethinking Diverse Human Preference Learning through Principal Component Analysis (2025.findings-acl)

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Challenge: Decomposed Reward Models extract diverse human preferences from binary comparisons without fine-grained annotations.
Approach: They propose a decomposed reward model that extracts diverse human preferences from binary comparisons without fine-grained annotations.
Outcome: The proposed approach extracts diverse human preferences from binary comparisons without fine-grained annotations.
FLAIR: Steering LLM Mathematical Problem Solving based on A Fuzzy-Logic-AssIsted Reasoner (2026.acl-long)

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Challenge: Existing approaches to mathematical reasoning rely on static heuristics or pre-determined reasoning strategies.
Approach: They propose an adaptive framework that integrates fuzzy theory into LLM-based mathematical reasoning.
Outcome: The proposed framework outperforms state-of-the-art models while offering effective and interpretable diagnostics of intermediate problem-solving states.
Event-Radar: Event-driven Multi-View Learning for Multimodal Fake News Detection (2024.acl-long)

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Challenge: Existing methods for detecting multimedia fake news have demonstrated excellent results . however, addressing event-level inconsistency and learning from poor-quality news remains a challenge .
Approach: They propose an Event-diven fake news detection framework that integrates visual manipulation, textual emotion and multimodal inconsistency at event-level for fake news identification.
Outcome: The proposed framework performs well on three large-scale fake news detection benchmarks.
From Insight to Action: A Novel Framework for Interpretability-Guided Data Selection in Large Language Models (2026.acl-long)

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Challenge: Recent research in mechanistic interpretability has revealed that Large Language models contain disentangled, human-understandable components.
Approach: They propose a framework that first identifies causal task features through frequency recall and interventional filtering, then selects “Feature-Resonant Data” that maximally activates task features for fine-tuning.
Outcome: The proposed framework outperforms existing models on mathematical reasoning, summarization, and translation tasks while using only 50% of the data.
Multimodal Large Language Models for Text-rich Image Understanding: A Comprehensive Review (2025.findings-acl)

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Challenge: Recent advances in vision-language models have unified perception and understanding tasks within Visual Question Answering paradigms.
Approach: They propose to outline timeline, architecture, and pipeline of nearly all TIU MLLMs and review their performance on mainstream benchmarks.
Outcome: The proposed models perform well on mainstream benchmarks and are compared with other models.
Track-SQL: Enhancing Generative Language Models with Dual-Extractive Modules for Schema and Context Tracking in Multi-turn Text-to-SQL (2025.naacl-long)

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Challenge: Existing approaches to generative language models struggle to handle the increasing complexity of multi-turn Text-to-SQL tasks.
Approach: They propose a framework which enhances generative language models with dual-extractive modules designed to track schema and contextual changes in multi-turn Text-to-SQL.
Outcome: The proposed framework achieves state-of-the-art performance on SparC and CoSQL datasets and significantly improves execution accuracy in multi-turn interactions by 7.1% and 9.55%.
DetectRL-X: Towards Reliable Multilingual and Real-World LLM-Generated Text Detection (2026.acl-long)

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Challenge: Existing detectors are limited in their ability to detect large language models generated content in multilingual environments.
Approach: They propose a multilingual benchmark to evaluate advanced detectors across 8 dimensions to better align with real-world applications.
Outcome: The proposed benchmark encompasses 8 languages commonly used in commercial contexts and collects human-written texts from 6 domains highly susceptible to LLM misuse.
Generative Annotation for ASR Named Entity Correction (2025.emnlp-main)

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Challenge: Existing named entity correction models fail to transcribe domain-speciffcnamed entities when theforms of the wrongly-transcribed words and the ground-truth entity are signiffcantly different.
Approach: They propose a method that utilizes speech sound features to retrieve candidate entities . it uses speech sound feature to annotate entityerrors in ASR transcripts .
Outcome: The proposed method can bring signiffcant improvement to entity accuracy.
ReCreate: Reasoning and Creating Domain Agents Driven by Experience (2026.acl-long)

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Challenge: Large Language Model (LLM) agents are reshaping the industrial landscape, but tasks differ widely, making them labor-intensive to build.
Approach: They propose an experience-driven framework for the automatic creation of domain agents . they leverage agent interaction histories to provide rich concrete signals on success or failure .
Outcome: The proposed framework outperforms human-designed agents and existing methods in experiments across diverse domains.
Bilingual Dictionary Based Neural Machine Translation without Using Parallel Sentences (2020.acl-main)

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Challenge: a monolingual speaker can learn to translate by looking up a bilingual dictionary . a novel task of machine translation (MT) is based on no parallel sentences but can refer to a ground-truth bilingual dictionary and large-scale monolingual corpora.
Approach: They propose a task of machine translation that uses a bilingual dictionary and large-scale monolingual corpora to translate a monolingual speaker.
Outcome: The proposed task is based on a bilingual dictionary and large scale monolingual corpora, while being independent on parallel sentences.
Enhancing Speech Large Language Models with Prompt-Aware Mixture of Audio Encoders (2025.emnlp-main)

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Challenge: Existing work on integrating audio encoders with large language models (LLMs) has focused on semantic understanding tasks, but different tasks may require distinct features that emphasize either semantic or acoustic aspects.
Approach: They propose to use a prompt-aware mixture to enhance the Speech LLM that uses multiple audio encoders to extract different features based on the prompt.
Outcome: The proposed approach outperforms all single-encoder Speech LLMs on ASR, speaker number verification, and AC tasks.
CACA: Context-Aware Cross-Attention Network for Extractive Aspect Sentiment Quad Prediction (2025.coling-main)

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Challenge: Existing generative ASQP approaches do not model the contextual relationship of the review sentence to predict implicit terms.
Approach: They propose an extractive ASQP framework, CACA, which features with Context-Aware Cross-Attention Network to enhance alignment of aspects and opinions.
Outcome: The proposed framework improves the alignment of aspects and opinions, whether explicit or implicit, and improves on three benchmark datasets.
M2PO: Multi-Perspective Multi-Pair Preference Optimization for Machine Translation (2026.acl-long)

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Challenge: prevailing methods for machine translation are often hindered by misleading reward signals.
Approach: They propose a framework that aligns large language models to human preferences . they propose 'M2PO' to correct the bias towards partial errors .
Outcome: The proposed framework outperforms open-source models and achieves parity with proprietary models.
AgentThink: A Unified Framework for Tool-Augmented Chain-of-Thought Reasoning in Vision-Language Models for Autonomous Driving (2025.findings-emnlp)

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Challenge: Vision-Language Models struggle with hallucinations, inefficient reasoning, and limited real-world validation hinders accurate perception and robust step-by-step reasoning.
Approach: AgentThink integrates Chain-of-Thought reasoning with dynamic, agent-style tool invocation for autonomous driving tasks.
Outcome: Experiments on the DriveLMM-o1 benchmark show AgentThink significantly boosts overall reasoning scores by 53.91% and enhances answer accuracy by 33.54% .
Aristotle: Mastering Logical Reasoning with A Logic-Complete Decompose-Search-Resolve Framework (2025.acl-long)

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Challenge: Existing systems fail to fully leverage the structure of logical tasks throughout the reasoning process, causing bottlenecks in efficiency and efficacy.
Approach: They propose a logic-complete reasoning framework, Aristotle, which integrates symbolic expressions and logical rules into the entire reasoning process.
Outcome: The proposed framework outperforms state-of-the-art reasoning frameworks in accuracy and efficiency.
Visual Prompt Tuning for Few-Shot Text Classification (2022.coling-1)

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Challenge: Existing work on pretraining models for text classification uses image encoders instead of visual prompts.
Approach: They propose a method to deploy large-scale pre-trained models in the prompt-tuning paradigm in few-shot learning.
Outcome: The proposed method outperforms the most recent prompt-tuning methods on five public text classification datasets.
A Cognitive Writing Perspective for Constrained Long-Form Text Generation (2025.findings-acl)

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Challenge: Large Language Models struggle to generate high-quality long-form text in a single pass . a new framework that trains LLMs to write human-like writing capabilities is needed .
Approach: They propose a framework that equips large language models with human-like cognitive writing capabilities . they use a planning agent and multiple Generation Agents to generate long-form text in parallel .
Outcome: CogWriter surpasses GPT-4o by 22% in complex instruction completion accuracy . the framework can generate coherent text in a single pass with fluency that rivals human writers .
Mistake Notebook Learning: Batch-Clustered Failures for Training-Free Agent Adaptation (2026.findings-acl)

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Challenge: Mistake Notebook Learning (MNL) is a new memory framework for large language model agents . it allows agents to distill shared error patterns into structured "mistake notes"
Approach: They propose a new memory framework that enables agents to self-curate generalizable guidance from batch-clustered failures.
Outcome: The proposed framework achieves competitive performance compared to existing memory mechanisms.
ActionIE: Action Extraction from Scientific Literature with Programming Languages (2024.acl-long)

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Challenge: a method that extracts experimental procedures from human language into actionable sequences in robotics language is challenging given the complexity of the instructions and context-dependent nature of the instruction.
Approach: They propose a method that converts actions written in natural language into Python code that can be easily translated into robotics language.
Outcome: The proposed method can extract experimental procedures from human language into actionable sequences in robotics language.
Cross-Lingual Contrastive Learning for Fine-Grained Entity Typing for Low-Resource Languages (2022.acl-long)

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Challenge: Experimental results show that by applying our framework, we can easily learn effective FGET models for low-resource languages.
Approach: They propose a cross-lingual contrastive learning framework to learn FGET models for low-resource languages.
Outcome: The proposed framework can learn effective FGET models for low-resource languages even without human-labeled data.
Don’t Corrupt the Fact: A Trustworthy RAG Watermarking Framework based on Dual Factual Shield (2026.acl-long)

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Challenge: Existing watermarking methods are fact-agnostic and cause "faithfulness hallucinations" a novel framework to enforce knowledge loyalty is proposed to improve watermarks .
Approach: They propose a new framework that enforces knowledge loyalty by spoofing terms from retrieved contexts and prompt-based semantic guidance to protect against factual corruption.
Outcome: The proposed framework reduces the Knowledge Corruption Rate while maintaining its original high security and robustness.
S2GSL: Incorporating Segment to Syntactic Enhanced Graph Structure Learning for Aspect-based Sentiment Analysis (2024.acl-long)

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Challenge: Existing graph-based approaches to learn static structures and dynamic latent trees are lacking in incorporating semantic and syntactic information simultaneously within complex global structures.
Approach: They propose a graph-based framework that incorporates semantic and syntactic information simultaneously within global structures.
Outcome: The proposed framework removes irrelevant contexts and syntactic dependencies and achieves complementarity across diverse structures.
Reflecting the Male Gaze: Quantifying Female Objectification in 19th and 20th Century Novels (2024.lrec-main)

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Challenge: a framework for analyzing gender bias in terms of female objectification is proposed . male gaze refers to a phenomenon in which women are depicted as objects of aesthetic pleasure .
Approach: They propose a framework for analyzing gender bias in terms of female objectification . they compute an agency bias score that indicates whether male entities are more likely to appear in the text as grammatical agents than female entities .
Outcome: The proposed framework measures female objectification along two axes.
M-Ped: Multi-Prompt Ensemble Decoding for Large Language Models (2025.findings-emnlp)

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Challenge: a new ensemble decoding approach enhances the performance of Large Language Models.
Approach: They propose a multi-prompt ensemble decoding approach to enhance LLM performance . they submit n variations of prompts with X to LLMs in batch mode to decode and derive probability distributions .
Outcome: The proposed method improves pass@k rates, LENS metrics and BLEU scores on diverse NLP tasks.
MAVIS: Multi-Agent Video Retrieval via Structured Video Understanding (2026.findings-acl)

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Challenge: Existing methods for video retrieval rely on embedding-based full-corpus scanning, but there is a bottleneck in semantic asymmetry and computational redundancy.
Approach: They propose a multi-agent framework that rethinks retrieval as cooperative reasoning . they parse raw videos into a structured semantic library, enabling explicit attribute-level indexing .
Outcome: The proposed framework bridges the granularity mismatch gap by parsing raw videos into a structured semantic library . it employs a Logic-aware Debate mechanism with a strict veto protocol . the proposed framework achieves competitive performance without task-specific fine-tuning .
Enhancing LLM-based Search Agents via Contribution Weighted Group Relative Policy Optimization (2026.acl-long)

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Challenge: Existing approaches to training large language models suffer from unstable value estimation, whereas outcome supervision struggles with credit assignment due to sparse, trajectory-level rewards.
Approach: They propose a framework that integrates process supervision into group relative policy optimization.
Outcome: The proposed framework outperforms standard GRPO on knowledge-intensive benchmarks by 5.0% and 6.3% on Qwen3-1.7B.
CFBench: A Comprehensive Constraints-Following Benchmark for LLMs (2025.acl-long)

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Challenge: Existing evaluations of Large Language Models (LLMs) focus on fragmented constraints or narrow scenarios, but they overlook the comprehensiveness and authenticity of constraints from the user’s perspective.
Approach: They propose a Chinese Comprehensive Constraints Following Benchmark for LLMs that compiles constraints from real-world instructions and constructs a systematic framework for constraint types.
Outcome: The proposed framework integrates multi-dimensional assessment criteria with requirement prioritization, covering various perspectives of constraints, instructions, and requirement fulfillment.
Unlocking Smarter Device Control: Foresighted Planning with a World Model-Driven Code Execution Approach (2025.findings-emnlp)

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Challenge: Current approaches to automating complex tasks focus on reactive policies and focus on visual observations.
Approach: They propose a framework that prioritizes natural language understanding and structured reasoning to enhance the agent’s global understanding of the environment by developing a task-oriented, refinable world model at the outset of the task.
Outcome: The proposed framework outperforms existing approaches in simulated environments and on real mobile devices.
Rethinking Entropy Interventions in RLVR: An Entropy Change Perspective (2026.acl-long)

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Challenge: Large Language Models (LLMs) have remarkable reasoning capabilities in complex tasks such as mathematics and coding.
Approach: They propose an entropy-modulation method that adaptively reweighs tokens based on theoretically-estimated entropic variations.
Outcome: The proposed method outperforms state-of-the-art methods in six mathematical reasoning and three coding benchmarks.
Long Context is Not Long at All: A Prospector of Long-Dependency Data for Large Language Models (2024.acl-long)

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Challenge: Long-context modeling capabilities are important for large language models (LLMs) however, training LLMs with long context windows is insufficient since some samples do not exhibit strong semantic dependencies across long contexts.
Approach: They propose a data mining framework ProLong that assigns each training sample with a long dependency score and ranks and filters them according to their results.
Outcome: The proposed framework can rank and filter training samples that exhibit more powerful long-context modeling abilities.
Estimating Soft Labels for Out-of-Domain Intent Detection (2022.emnlp-main)

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Challenge: Existing methods to detect out-of-dominance (OOD) intents are limited by the lack of OOD samples.
Approach: They propose an adaptive soft pseudo labeling method that can estimate soft labels for pseudo OOD samples when training OOD detectors.
Outcome: The proposed method outperforms competing methods on three benchmark datasets and consistently outperformed previous methods.
Dynamic Emotion and Personality Profiling for Multimodal Deception Detection (2026.acl-long)

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Challenge: Existing methods for deception detection lack sample-level dynamic annotations for emotions and personality.
Approach: They propose a multi-model multi-prompt annotation scheme and a strict label quality evaluation standard for deception, emotion, and personality annotations.
Outcome: The proposed framework outperforms state-of-the-art models on the MDPE and DDEP datasets.
OpenCoder: The Open Cookbook for Top-Tier Code Large Language Models (2025.acl-long)

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Challenge: Code LLMs lack reproducible data pipelines and training protocols for reproducible advancements in code intelligence.
Approach: They propose a top-tier code LLM that releases model weights and inference code . reproducible data pipelines, rigorous experimental ablation results and training protocols are included .
Outcome: The proposed model achieves comparable performance to leading models and serves as an "open cookbook" reproducible training data, rigorous experimental ablation results, and detailed training protocols are also included in the model.
Combining the Best of Both Worlds: A Method for Hybrid NMT and LLM Translation (2025.findings-acl)

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Challenge: Large language models have advantages over neural machine translation systems, but they suffer from high computational costs and significant latency.
Approach: They propose a scheduling policy that optimizes translation result while ensuring fast speed and as little LLM usage as possible.
Outcome: The proposed model achieves optimal translation performance with less LLM usage on multilingual test sets.
Incentivizing Parametric Knowledge via Reinforcement Learning with Verifiable Rewards for Cross-Cultural Entity Translation (2026.acl-long)

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Challenge: Current systems often fall short of this goal in settings where translation hinges on culturally grounded entities such as books, films, places, songs and idioms.
Approach: They propose a framework that anchors supervision on a verifiable, entity-level reward signal and incorporates lightweight structural gates to stabilize optimization.
Outcome: The proposed framework improves on XC-Translate and shows that it can learn a robust reasoning process rather than imitating reference translations.
SolEval: Benchmarking Large Language Models for Repository-level Solidity Smart Contract Generation (2025.emnlp-main)

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Challenge: Existing methods focus on Python and Java, neglecting Solidity, the programming language for Ethereum smart contracts.
Approach: They construct a repository-level benchmark for Solidity to evaluate the performance of LLMs on Ethereum.
Outcome: The proposed benchmarks show that the best performing LLM achieves only 26.29% Pass@10, highlighting room for improvement in Solidity code generation.
HCRE: LLM-based Hierarchical Classification for Cross-Document Relation Extraction with a Prediction-then-Verification Strategy (2026.findings-acl)

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Challenge: Existing approaches to cross-document relation extraction (RE) focus on identifying relations between head and tail entities from single sentence or document.
Approach: They propose a hierarchical relation tree-based LLM-based hierarchic classification model for cross-document relation extraction (HCRE) based on predefined relations, the model can perform hierarchically classification level by level.
Outcome: The proposed model outperforms existing baselines and validates its effectiveness.
SARA: Unlocking Multilingual Knowledge in Mixture-of-Experts via Semantically Anchored Routing Alignment (2026.findings-acl)

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Challenge: Low-resource language tokens are often routed to different experts than those activated by high-resourced inputs, which hinders their efficacy in multilingual contexts.
Approach: They propose a framework to transfer specialized capabilities from high-resource languages as anchors to low-resourced languages by using a symmetric Jensen-Shannon constraint.
Outcome: The proposed framework outperforms standard instruction tuning on 5 low-resource languages and 3 benchmarks.
Neeko: Leveraging Dynamic LoRA for Efficient Multi-Character Role-Playing Agent (2024.emnlp-main)

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Challenge: Large Language Models (LLMs) have revolutionized open-domain dialogue agents but face challenges in multi-character role-playing (MCRP) scenarios.
Approach: They propose a framework for efficient multi-character role-playing that employs a dynamic low-rank adapter strategy and distinct LoRA blocks for each character.
Outcome: Neeko employs a dynamic low-rank adapter (LoRA) strategy, enabling it to adapt seamlessly to diverse characters.
RevPRAG: Revealing Poisoning Attacks in Retrieval-Augmented Generation through LLM Activation Analysis (2025.findings-emnlp)

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Challenge: Retrieval-Augmented Generation (RAG) enriches the input to LLMs by retrieving information from the relevant knowledge database.
Approach: They propose to use a knowledge database to enrich the input of LLMs by retrieving information from the relevant knowledge database.
Outcome: The proposed approach can achieve 98% true positive rate while maintaining a false positive rate close to 1%.
Revealing Procedural Reasoning Structures in Chain-of-Thought Training via Span-Level Gradient Organization (2026.acl-long)

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Challenge: Chain-of-Thought (CoT) prompts elicit multi-step reasoning, yet how reasoning related structure is expressed during training remains poorly understood.
Approach: They propose a framework that tracks span-level gradients during fine-tuning on reasoning benchmarks to understand how models develop structured, step-by-step reasoning capabilities.
Outcome: The proposed framework tracks span-level gradients during fine-tuning on reasoning benchmarks to understand how models develop structured, step-by-step reasoning capabilities.
ERNIE-Layout: Layout Knowledge Enhanced Pre-training for Visually-rich Document Understanding (2022.findings-emnlp)

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Challenge: Existing methods for visually rich document understanding lack layout-centered knowledge . experimental results show that ERNIE-Layout improves layout awareness .
Approach: They propose a document pre-training solution with layout knowledge enhancement in the whole workflow to learn better representations that combine the features from text, layout, and image.
Outcome: The proposed model outperforms existing models on key downstream tasks.
Hyperlink-induced Pre-training for Passage Retrieval in Open-domain Question Answering (2022.acl-long)

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Challenge: Existing methods to train dense passage retrieval have a large data gap between upstream and downstream relevance.
Approach: They propose a method to pre-train the dense retriever with the text relevance induced by hyperlinks within Web documents.
Outcome: The proposed method outperforms existing methods under different scenarios and in the open-domain question answering domain.

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