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Shi Han

36 accepted papers

2026

Jupiter: Enhancing LLM Data Analysis Capabilities via Notebook and Inference-Time Value-Guided Search

AAAI 2026technical

Large language models (LLMs) have shown great promise in automating data science workflows. However, existing models still struggle with multi-step reasoning and tool use, limiting their effectiveness on complex data analysis tasks. To address this limitation, we propose a scalable pipeline that ext

Cited by 0SourcePDFScholar
2026

SheetBrain: A Neuro-Symbolic Agent for Accurate Reasoning over Complex and Large Spreadsheets

AAAI 2026technical

Understanding and reasoning over complex spreadsheets remain fundamental challenges for large language models (LLMs), which often struggle with intricate structures and rely solely on neural computation. In this work, we propose SheetBrain, a neuro-symbolic dual-workflow agent framework for precise

Cited by 0SourcePDFScholar
2026

Test-Time Learning of Causal Structure from Interventional Data

ICML 2026poster

Supervised Causal Learning has shown promise in causal discovery, yet it often struggles with generalization across diverse interventional settings, particularly when intervention targets are unknown. To address this, we propose TICL (Test-time Interventional Causal Learning), a novel method that sy…

Cited by 0SourceScholar
2025

Extract Information from Hybrid Long Documents Leveraging LLMs: A Framework and Dataset

ICASSP 2025accepted

Large Language Models (LLMs) demonstrate exceptional performance in textual understanding and tabular reasoning tasks. However, their ability to comprehend and analyze hybrid text, containing textual and tabular data, remains unexplored. The hybrid text often appears in the form of hybrid long docum…

Cited by 0SourceScholar
2025

Learning Identifiable Structures Helps Avoid Bias in DNN-based Supervised Causal Learning

AISTATS 2025poster

Causal discovery is a structured prediction task that aims to predict causal relations among variables based on their data samples. Supervised Causal Learning (SCL) is an emerging paradigm in this field. Existing Deep Neural Network (DNN)-based methods commonly adopt the “Node-Edge approach”, in whi…

Cited by 0SourcecodeScholar
2025

MMTU: A Massive Multi-Task Table Understanding and Reasoning Benchmark

NeurIPS 2025poster

Tables and table-based use cases play a crucial role in many important real-world applications, such as spreadsheets, databases, and computational notebooks, which traditionally require expert-level users like data engineers, data analysts, and database administrators to operate. Although LLMs have…

Cited by 0SourcecodeScholar
2025

SheetDesigner: MLLM-Powered Spreadsheet Layout Generation with Rule-Based and Vision-Based Reflection

EMNLP 2025

Spreadsheets are critical to data-centric tasks, with rich, structured layouts that enable efficient information transmission. Given the time and expertise required for manual spreadsheet layout design, there is an urgent need for automated solutions.However, existing automated layout models are ill

Cited by 0SourcePDFScholar
2025

Table-LLM-Specialist: Language Model Specialists for Tables using Iterative Fine-tuning

EMNLP 2025

Language models such as GPT and Llama have shown remarkable ability on diverse natural language tasks, yet their performance on complex table tasks (e.g., NL-to-Code, data cleaning, etc.) continues to be suboptimal. To improve their performance, task-specific fine-tuning is often needed, which, howe

2025

TableLoRA: Low-rank Adaptation on Table Structure Understanding for Large Language Models

ACL 2025long

Tabular data are crucial in many fields and their understanding by large language models (LLMs) under high parameter efficiency paradigm is important. However, directly applying parameter-efficient fine-tuning (PEFT) techniques to tabular tasks presents significant challenges, particularly in terms…

2025

TwT: Thinking without Tokens by Habitual Reasoning Distillation with Multi-Teachers’ Guidance

EMNLP 2025

Large Language Models (LLMs) have made significant strides in problem-solving by incorporating reasoning processes. However, this enhanced reasoning capability results in an increased number of output tokens during inference, leading to higher computational costs. To address this challenge, we propo

Cited by 0SourcePDFScholar
2024

CoCoST: Automatic Complex Code Generation with Online Searching and Correctness Testing

EMNLP 2024main

Large Language Models have revolutionized code generation ability by converting natural language descriptions into executable code. However, generating complex code within real-world scenarios remains challenging due to intricate structures, subtle bugs, understanding of advanced data types, and lac…

2024

Encoding Spreadsheets for Large Language Models

EMNLP 2024main

Spreadsheets are characterized by their extensive two-dimensional grids, flexible layouts, and varied formatting options, which pose significant challenges for large language models (LLMs). In response, we introduce SheetEncoder, pioneering an efficient encoding method designed to unleash and optimi…

Cited by 1SourcePDFScholar
2024

KET-QA: A Dataset for Knowledge Enhanced Table Question Answering

COLING 2024main

Due to the concise and structured nature of tables, the knowledge contained therein may be incomplete or missing, posing a significant challenge for table question answering (TableQA) systems. However, most existing datasets either overlook the challenge of missing knowledge in TableQA or only utili…

2024

PromptIntern: Saving Inference Costs by Internalizing Recurrent Prompt during Large Language Model Fine-tuning

EMNLP 2024finding

Recent advances in fine-tuning large language models (LLMs) have greatly enhanced their usage in domain-specific tasks. Despite the success, fine-tuning continues to rely on repeated and lengthy prompts, which escalate computational expenses, require more resources, and lead to slower inference. In…

Cited by 9SourcePDFScholar
2024

TAP4LLM: Table Provider on Sampling, Augmenting, and Packing Semi-structured Data for Large Language Model Reasoning

EMNLP 2024finding

Table reasoning tasks have shown remarkable progress with the development of large language models (LLMs), which involve interpreting and drawing conclusions from tabular data based on natural language (NL) questions. Existing solutions mainly tested on smaller tables face scalability issues and str…

2024

TAROT: A Hierarchical Framework with Multitask co-pretraining on Semi-Structured Data Towards Effective Person-Job fit

ICASSP 2024accepted

Person-job fit is an essential part of online recruitment platforms in serving various downstream applications like Job Search and Candidate Recommendation. Recently, pretrained large language models have further enhanced the effectiveness by leveraging richer textual information in user profiles an…

Cited by 0SourceScholar
2024

Text-to-Image Generation for Abstract Concepts

AAAI 2024technical

Recent years have witnessed the substantial progress of large-scale models across various domains, such as natural language processing and computer vision, facilitating the expression of concrete concepts. Unlike concrete concepts that are usually directly associated with physical objects, expressin…

2024

Text2Analysis: A Benchmark of Table Question Answering with Advanced Data Analysis and Unclear Queries

AAAI 2024technical

Tabular data analysis is crucial in various fields, and large language models show promise in this area. However, current research mostly focuses on rudimentary tasks like Text2SQL and TableQA, neglecting advanced analysis like forecasting and chart generation. To address this gap, we developed the…

2023

AnaMeta: A Table Understanding Dataset of Field Metadata Knowledge Shared by Multi-dimensional Data Analysis Tasks

ACL 2023findings

Tabular data analysis is performed everyday across various domains. It requires an accurate understanding of field semantics to correctly operate on table fields and find common patterns in daily analysis. In this paper, we introduce the AnaMeta dataset, a collection of 467k tables with derived supe…

2023

CASR: Generating Complex Sequences with Autoregressive Self-Boost Refinement

ICLR 2023poster

There are sequence generation tasks where the best order to generate the target sequence is not left-to-right. For example, an answer to the Sudoku game, a structured code like s-expression, and even a logical natural language answer where the analysis may be generated after the decision. We define…

Cited by 0SourcePDFScholar
2023

Causal-Based Supervision of Attention in Graph Neural Network: A Better and Simpler Choice towards Powerful Attention

IJCAI 2023poster

Recent years have witnessed the great potential of attention mechanism in graph representation learning. However, while variants of attention-based GNNs are setting new benchmarks for numerous real-world datasets, recent works have pointed out that their induced attentions are less robust and genera…

Cited by 4SourcePDFScholar
2023

HermEs: Interactive Spreadsheet Formula Prediction via Hierarchical Formulet Expansion

ACL 2023long

We propose HermEs, the first approach for spreadsheet formula prediction via HiEraRchical forMulet ExpanSion, where hierarchical expansion means generating formulas following the underlying parse tree structure, and Formulet refers to commonly-used multi-level patterns mined from real formula parse…

2023

Out-of-Distribution Detection based on In-Distribution Data Patterns Memorization with Modern Hopfield Energy

ICLR 2023poster

Out-of-Distribution (OOD) detection is essential for safety-critical applications of deep neural networks. OOD detection is challenging since DNN models may produce very high logits value even for OOD samples. Hence, it is of great difficulty to discriminate OOD data by directly adopting Softmax on…

2023

SheetPT: Spreadsheet Pre-training Based on Hierarchical Attention Network

AAAI 2023technical

Spreadsheets are an important and unique type of business document for data storage, analysis and presentation. The distinction between spreadsheets and most other types of digital documents lies in that spreadsheets provide users with high flexibility of data organization on the grid. Existing rela…

Cited by 0SourcePDFScholar
2023

Unveiling the Black Box of PLMs with Semantic Anchors: Towards Interpretable Neural Semantic Parsing

AAAI 2023technical

The recent prevalence of pretrained language models (PLMs) has dramatically shifted the paradigm of semantic parsing, where the mapping from natural language utterances to structured logical forms is now formulated as a Seq2Seq task. Despite the promising performance, previous PLM-based approaches o…

Cited by 5SourcePDFScholar
2022

Accelerating Code Search with Deep Hashing and Code Classification

ACL 2022long

Code search is to search reusable code snippets from source code corpus based on natural languages queries. Deep learning-based methods on code search have shown promising results. However, previous methods focus on retrieval accuracy, but lacked attention to the efficiency of the retrieval process.…

Cited by 18SourcePDFScholar
2022

FORTAP: Using Formulas for Numerical-Reasoning-Aware Table Pretraining

ACL 2022long

Tables store rich numerical data, but numerical reasoning over tables is still a challenge. In this paper, we find that the spreadsheet formula, a commonly used language to perform computations on numerical values in spreadsheets, is a valuable supervision for numerical reasoning in tables. Consider…

2022

FormLM: Recommending Creation Ideas for Online Forms by Modelling Semantic and Structural Information

EMNLP 2022main

Online forms are widely used to collect data from human and have a multi-billion market. Many software products provide online services for creating semi-structured forms where questions and descriptions are organized by predefined structures. However, the design and creation process of forms is sti…

Cited by 1SourcePDFScholar
2022

HiTab: A Hierarchical Table Dataset for Question Answering and Natural Language Generation

ACL 2022long

Tables are often created with hierarchies, but existing works on table reasoning mainly focus on flat tables and neglect hierarchical tables. Hierarchical tables challenge numerical reasoning by complex hierarchical indexing, as well as implicit relationships of calculation and semantics. We present…

2022

Neuron with Steady Response Leads to Better Generalization

NeurIPS 2022accept

Regularization can mitigate the generalization gap between training and inference by introducing inductive bias. Existing works have already proposed various inductive biases from diverse perspectives. However, none of them explores inductive bias from the perspective of class-dependent response dis…

Cited by 6SourcePDFScholar
2022

PLOG: Table-to-Logic Pretraining for Logical Table-to-Text Generation

EMNLP 2022main

Logical table-to-text generation is a task that involves generating logically faithful sentences from tables, which requires models to derive logical-level facts from table records via logical inference. It raises a new challenge on the logical-level content planning of table-to-text models. However…

2022

RACE: Retrieval-augmented Commit Message Generation

EMNLP 2022main

Commit messages are important for software development and maintenance. Many neural network-based approaches have been proposed and shown promising results on automatic commit message generation. However, the generated commit messages could be repetitive or redundant. In this paper, we propose RACE,…

2022

TaCube: Pre-computing Data Cubes for Answering Numerical-Reasoning Questions over Tabular Data

EMNLP 2022main

Existing auto-regressive pre-trained language models (PLMs) like T5 and BART, have been well applied to table question answering by UNIFIEDSKG and TAPEX, respectively, and demonstrated state-of-the-art results on multiple benchmarks. However, auto-regressive PLMs are challenged by recent emerging nu…

2022

Table Pre-training: A Survey on Model Architectures, Pre-training Objectives, and Downstream Tasks

IJCAI 2022poster

Following the success of pre-training techniques in the natural language domain, a flurry of table pre-training frameworks have been proposed and have achieved new state-of-the-arts on various downstream tasks such as table question answering, table type recognition, column relation classification,…

Cited by 71SourcePDFScholar
2022

Towards Robust Numerical Question Answering: Diagnosing Numerical Capabilities of NLP Systems

EMNLP 2022main

Numerical Question Answering is the task of answering questions that require numerical capabilities. Previous works introduce general adversarial attacks to Numerical Question Answering, while not systematically exploring numerical capabilities specific to the topic. In this paper, we propose to con…

2021

CAST: Enhancing Code Summarization with Hierarchical Splitting and Reconstruction of Abstract Syntax Trees

EMNLP 2021main

Code summarization aims to generate concise natural language descriptions of source code, which can help improve program comprehension and maintenance. Recent studies show that syntactic and structural information extracted from abstract syntax trees (ASTs) is conducive to summary generation. Howeve…