Yu-Chien (Tommy) Tang

Yu-Chien (Tommy) Tang

Ph.D. Student · Institute of Computer Science and Engineering
National Yang Ming Chiao Tung University (NYCU), Taiwan

I am a 2nd-year Ph.D. student in Computer Science at National Yang Ming Chiao Tung University (NYCU), advised by Prof. An-Zi Yen. My research interests center on large language models, information retrieval, question answering, and multimodal assistant.

Before starting my Ph.D., I worked on LLM-driven business intelligence systems at TSMC and language-model classification systems at MediaTek. I am broadly interested in building reliable NLP systems that connect research ideas with practical user-facing workflows.

Research Interests

News

  • 2026
    Paper accepted to EACL 2026: MathEDU.
  • 2026
    Student abstract accepted to AAAI 2026 on LLM behavior under malicious multiple-choice options.
  • 2025
    Paper accepted to SIGIR 2025 on template-based financial report generation.
  • 2025
    Selected for the AAAI Student Scholar & Volunteer Program.
  • 2024
    Awarded the NSTC Graduate Research Fellowship.
  • 2023
    Paper accepted to Findings of EMNLP 2023: RSVP.

Selected Publications

VDAR-Router workflow from query difficulty analysis and retrieval to model reward ranking.

VDAR-Router: Adaptive LLMs Routing via Verbalized Query Difficulty Analysis Retrieval

arXiv preprint, 2026
Yu-Chien Tang, Jun-Chen Hung, Wen-Chih Peng, An-Zi Yen

Routes each query to an appropriate LLM by verbalizing its difficulty, retrieving difficulty-matched examples, and balancing performance against cost.

VISTA system architecture from scenario data through script and video generation.

VISTA: A Generative Egocentric Video Framework for Daily Assistance

arXiv preprint, 2026
Yu-Hsiang Liu, Yu-Chien Tang, An-Zi Yen

Introduces a controllable video-synthesis framework for creating realistic egocentric scenarios in which AI agents provide reactive and proactive daily assistance.

ConceptKT question distribution across thirteen mathematical and scientific categories.

ConceptKT: A Benchmark for Concept-Level Deficiency Prediction in Knowledge Tracing

LREC 2026
Yu-Chen Kang, Yu-Chien Tang, An-Zi Yen

Introduces concept-level deficiency prediction and a benchmark for diagnosing the concepts students are likely to struggle with on future problems.

OI-Bench example showing how an injected misleading option changes an LLM answer.

OI-Bench: An Option Injection Benchmark for Evaluating LLM Susceptibility to Directive Interference

arXiv preprint, 2026
Yow-Fu Liou, Yu-Chien Tang, Yu-Hsiang Liu, An-Zi Yen

Presents a 3,000-question benchmark with 16 directive types for measuring and mitigating LLM susceptibility to misleading multiple-choice options.

MathEDU paper figure showing a model feedback example.

MathEDU: Feedback Generation on Problem-Solving Processes for Mathematical Learning Support

EACL 2026
Wei-Ling Hsu, Yu-Chien Tang, An-Zi Yen

Studies feedback generation for mathematical learning support using authentic student solutions and teacher feedback.

Obedience or Vigilance? How Large Language Models React to Malicious Multiple-Choice Options

AAAI 2026 Student Abstract
Yow-Fu Liou, Yu-Chien Tang, An-Zi Yen

Analyzes how LLMs react when multiple-choice options include malicious or misleading choices.

AgenticIR framework architecture from the paper.

Template-Based Financial Report Generation in Agentic and Decomposed Information Retrieval

SIGIR 2025
Yong-En Tian*, Yu-Chien Tang*, Kuang-Da Wang, An-Zi Yen, Wen-Chih Peng

Compares agentic and decomposed information-retrieval workflows for generating structured financial reports.

RSVP framework architecture with response retrieval and response generation.

RSVP: Customer Intent Detection via Agent Response Contrastive and Generative Pre-Training

Findings of EMNLP 2023
Yu-Chien Tang, Wei-Yao Wang, An-Zi Yen, Wen-Chih Peng

Uses agent responses for contrastive and generative pre-training in customer intent detection.

Experience

AI Engineer

TSMC · Jan 2024 - Apr 2025
NLP, LLM, DevOps

Developed an LLM-driven chatbot for business intelligence use cases, including cross-document summarization and question answering with RAG.

Machine Learning & Deep Learning Engineer Intern

MediaTek · Sep 2022 - Mar 2023
NLP, Distributed Computing

Fine-tuned language models to classify engineer queries automatically.

Database and Backend Developer

NCAP, NYCU CS · Jul 2021 - Jun 2022
Django, Docker, MySQL, Shell, Git

Built backend and database systems for an alumni communication platform.

Teaching & Honors

Teaching Assistant, Introduction to NLP

NYCU CS · Spring 2026

Teaching Assistant, Information Retrieval

NYCU CS · Fall 2025

Teaching Assistant, Introduction to NLP

NYCU CS · Fall 2024

Teaching Assistant, Data Science Project

NYCU CS · Fall 2022

Teaching Assistant, Introduction to Database System

NCTU CS · Spring 2021

Scholarships & Awards

  • 2025
    AAAI Student Scholar & Volunteer Program
  • 2024
    NSTC Graduate Research Fellowship Program
  • 2023
    Appier Artificial Intelligence and Information Technology Top Research Award Program
  • 2023
    AAAI Student Scholar & Volunteer Program
  • 2020
    MOST College Student Research Scholarship Program

Services

Reviewer

  • IJCAI'25
  • ACL'25
  • EMNLP'25
  • AAAI'26
  • ROCLING'25
  • EACL'26
  • SIGIR'26

Contact