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Zitao Liu

32 accepted papers

2026

A Compress-Expand Framework for Automatic Lesson Plan Generation

AAAI 2026technical

Creating a well-structured lesson plan is essential for improving classroom efficiency, yet it is often a labor-intensive process. Recently, many studies have leveraged large language models (LLMs) to generate lesson plans automatically. However, existing methods heavily rely on LLMs that are pre-tr

Cited by 0SourcePDFScholar
2026

D&R: Recovery-based AI-Generated Text Detection via a Single Black-box LLM Call

ICLR 2026poster

Large language models (LLMs) generate increasingly human-like text, raising concerns about misinformation and authenticity. Detecting AI-generated text remains challenging: existing methods often underperform, especially on short texts, require probability access unavailable in real-world black-box…

Cited by 0SourcecodeScholar
2026

From Text to Talk: Audio-Language Model Needs Non-Autoregressive Joint Training

ICLR 2026poster

Recent advances in large language models (LLMs) have attracted significant interest in extending their capabilities to multimodal scenarios, particularly for speech-to-speech conversational systems. However, existing multimodal models handling interleaved audio and text rely on autoregressive (AR) m…

Cited by 0SourcecodeScholar
2026

Improving Scientific Formula Verbalization in Large Speech Language Models for Accessible Learning

IJCAI 2026

Online learning systems provide accessible learning opportunities for blind or low-vision students. To support access to complex scientific materials, the speech models used in these systems need to deliver accurate scientific formula verbalization. While recent large speech language models (LSLMs)

Cited by 0Scholar
2026

Learning from Scoring Disagreements: Contrastive Error Mining for Efficient and Robust LLM-based Assessment

AAAI 2026technical

Automated grading of student responses still faces numerous challenges, particularly when dealing with complex and ambiguous answers. In particular, large models are prone to scoring bias when handling uncertain responses, and few-shot reasoning methods often lack stability, which limits their appli

Cited by 0SourcePDFScholar
2026

PoemDirector: A Multi-Agent Context-Adaptive Instructional Mode Selection Framework for Chinese Classical Poetry Video Generation

IJCAI 2026

Classical poetry is a significant component of aesthetics and cultural inheritance in China's K–12 language education, and web-based instructional videos have become the primary way students can learn about classical poetry. However, current approaches have failed to produce both high-quality explan

Cited by 0Scholar
2025

Advancing Mathematical Reasoning in Language Models: The Impact of Problem-Solving Data, Data Synthesis Methods, and Training Stages

ICLR 2025poster

Mathematical reasoning remains a challenging area for large language models (LLMs), prompting the development of math-specific LLMs such as LLEMMA, DeepSeekMath, and Qwen2-Math, among others. These models typically follow a two-stage training paradigm: pre-training with math-related corpora and post…

Cited by 1SourcePDFScholar
2025

Cognitive Fluctuations Enhanced Attention Network for Knowledge Tracing

AAAI 2025technical

Knowledge tracing (KT) involves using the historical records of student-learning interactions to anticipate their performance on forthcoming questions. Central to this process is the modeling of human cognition to gain deeper insights into how knowledge is acquired and retained. Human cognition is c…

Cited by 0SourcePDFScholar
2025

Data Efficient Adaptation in Large Language Models via Continuous Low-Rank Fine-Tuning

NeurIPS 2025poster

Recent advancements in Large Language Models (LLMs) have emphasized the critical role of fine-tuning (FT) techniques in adapting LLMs to specific tasks, especially when retraining from scratch is computationally infeasible. Fine-tuning enables LLMs to leverage task- or domain-specific data, producin…

Cited by 0SourcecodeScholar
2025

Denoised Attention and Question-Augmented Representations for Knowledge Tracing

IJCAI 2025

Knowledge tracing (KT) is an essential task in online education systems. It aims to predict the future performance of students based on their historical learning interaction data. Despite significant advancements in attention-based KT models, they still face some limitations: inaccurate input repres

2025

Rethinking and Improving Student Learning and Forgetting Processes for Attention based Knowledge Tracing Models

AAAI 2025technical

Knowledge tracing (KT) models students' knowledge states and predicts their future performance based on their historical interaction data. However, attention based KT models struggle to accurately capture diverse forgetting behaviors in ever-growing interaction sequences. First, existing models us…

Cited by 0SourcePDFScholar
2025

SIGMA: Selective Gated Mamba for Sequential Recommendation

AAAI 2025technical

Sequential Recommender Systems (SRS) has stood out as a highly promising technique in numerous domains due to its impressive capability of capturing complex user preferences. Current SRS have employed transformer-based models to give the next-item prediction. Nevertheless, its quadratic computationa…

Cited by 0SourcePDFScholar
2025

StatsChartMWP: A Dataset for Evaluating Multimodal Mathematical Reasoning Abilities on Math Word Problems with Statistical Charts

EMNLP 2025

Recent advancements in Large Multimodal Models (LMMs) have showcased their impressive capabilities in mathematical reasoning tasks in visual contexts. As a step toward developing AI models to conduct rigorous multi-step multimodal reasoning, we introduce StatsChartMWP, a real-world educational datas

2025

What Are Step-Level Reward Models Rewarding? Counterintuitive Findings from MCTS-Boosted Mathematical Reasoning

AAAI 2025technical

Step-level reward models (SRMs) can significantly enhance mathematical reasoning performance through process supervision or step-level preference alignment based on reinforcement learning. The performance of SRMs is pivotal, as they serve as critical guidelines, ensuring that each step in the reason…

Cited by 6SourcePDFScholar
2024

Enhancing Length Generalization for Attention Based Knowledge Tracing Models with Linear Biases

IJCAI 2024poster

Knowledge tracing (KT) is the task of predicting students' future performance based on their historical learning interaction data. With the rapid advancement of attention mechanisms, many attention based KT models are developed. However, existing attention based KT models exhibit performance drops a…

Cited by 8SourcePDFScholar
2023

Improving Interpretability of Deep Sequential Knowledge Tracing Models with Question-centric Cognitive Representations

AAAI 2023technical

Knowledge tracing (KT) is a crucial technique to predict students’ future performance by observing their historical learning processes. Due to the powerful representation ability of deep neural networks, remarkable progress has been made by using deep learning techniques to solve the KT problem. The…

Cited by 61SourcePDFScholar
2023

Probabilistic Categorical Adversarial Attack and Adversarial Training

ICML 2023poster

The studies on adversarial attacks and defenses have greatly improved the robustness of Deep Neural Networks (DNNs). Most advanced approaches have been overwhelmingly designed for continuous data such as images. However, these achievements are still hard to be generalized to categorical data. To bri…

Cited by 14SourcePDFScholar
2023

simpleKT: A Simple But Tough-to-Beat Baseline for Knowledge Tracing

ICLR 2023poster

Knowledge tracing (KT) is the problem of predicting students' future performance based on their historical interactions with intelligent tutoring systems. Recently, many works present lots of special methods for applying deep neural networks to KT from different perspectives like model architecture,…

2022

pyKT: A Python Library to Benchmark Deep Learning based Knowledge Tracing Models

NeurIPS 2022accept

Knowledge tracing (KT) is the task of using students' historical learning interaction data to model their knowledge mastery over time so as to make predictions on their future interaction performance. Recently, remarkable progress has been made of using various deep learning techniques to solve the…

Cited by 63SourcePDFScholar
2021

COMPLETER: Incomplete Multi-View Clustering via Contrastive Prediction

CVPR 2021poster

In this paper, we study two challenging problems in incomplete multi-view clustering analysis, namely, i) how to learn an informative and consistent representation among different views without the help of labels and ii) how to recover the missing views from data. To this end, we propose a novel obj…

Cited by 424PDFcodeScholar
2021

CTAL: Pre-training Cross-modal Transformer for Audio-and-Language Representations

EMNLP 2021main

Existing audio-language task-specific predictive approaches focus on building complicated late-fusion mechanisms. However, these models are facing challenges of overfitting with limited labels and low model generalization abilities. In this paper, we present a Cross-modal Transformer for Audio-and-L…

2021

Graph Neural Networks with Adaptive Residual

NeurIPS 2021poster

Graph neural networks (GNNs) have shown the power in graph representation learning for numerous tasks. In this work, we discover an interesting phenomenon that although residual connections in the message passing of GNNs help improve the performance, they immensely amplify GNNs' vulnerability agains…

2021

Long Text Generation by Modeling Sentence-Level and Discourse-Level Coherence

ACL 2021long

Generating long and coherent text is an important but challenging task, particularly for open-ended language generation tasks such as story generation. Despite the success in modeling intra-sentence coherence, existing generation models (e.g., BART) still struggle to maintain a coherent event sequen…

2021

Mathematical Word Problem Generation from Commonsense Knowledge Graph and Equations

EMNLP 2021main

There is an increasing interest in the use of mathematical word problem (MWP) generation in educational assessment. Different from standard natural question generation, MWP generation needs to maintain the underlying mathematical operations between quantities and variables, while at the same time en…

2021

OpenMEVA: A Benchmark for Evaluating Open-ended Story Generation Metrics

ACL 2021long

Automatic metrics are essential for developing natural language generation (NLG) models, particularly for open-ended language generation tasks such as story generation. However, existing automatic metrics are observed to correlate poorly with human evaluation. The lack of standardized benchmark data…

2021

Partially View-Aligned Representation Learning With Noise-Robust Contrastive Loss

CVPR 2021poster

In real-world applications, it is common that only a portion of data is aligned across views due to spatial, temporal, or spatiotemporal asynchronism, thus leading to the so-called Partially View-aligned Problem (PVP). To solve such a less-touched problem without the help of labels, we propose simul…

Cited by 170PDFScholar
2020

CLEARER: Multi-Scale Neural Architecture Search for Image Restoration

NeurIPS 2020poster

Multi-scale neural networks have shown effectiveness in image restoration tasks, which are usually designed and integrated in a handcrafted manner. Different from the existing labor-intensive handcrafted architecture design paradigms, we present a novel method, termed as multi-sCaLe nEural ARchitect…

2020

Does Gender Matter? Towards Fairness in Dialogue Systems

COLING 2020main

Recently there are increasing concerns about the fairness of Artificial Intelligence (AI) in real-world applications such as computer vision and recommendations. For example, recognition algorithms in computer vision are unfair to black people such as poorly detecting their faces and inappropriately…

2020

Multimodal Learning for Classroom Activity Detection

ICASSP 2020accepted

Classroom activity detection (CAD) focuses on accurately classifying whether the teacher or student is speaking and recording both the length of individual utterances during a class. A CAD solution helps teachers get instant feedback on their pedagogical instructions. This greatly improves educators…

Cited by 0SourceScholar
2020

Personalized Multimodal Feedback Generation in Education

COLING 2020main

The automatic feedback of school assignments is an important application of AI in education. In this work, we focus on the task of personalized multimodal feedback generation, which aims to generate personalized feedback for teachers to evaluate students’ assignments involving multimodal inputs such…

2020

Upgrading CRFS to JRFS and its Benefits to Sequence Modeling and Labeling

ICASSP 2020accepted

Two important sequence tasks are sequence modeling and labeling. Sequence modeling involves determining the probabilities of sequences, e.g. language modeling. It is still difficult to improve language modeling with additional relevant tags, e.g. part-of-speech (POS) tags. For sequence labeling, it…

Cited by 0SourceScholar