Weather-Guard: A Real-Time Dynamic Contextual Guardrail for Agentic AI Interactions
ICASSP 2027 · Under review
Ruijie Zheng
HCI/VLA/LLM Security
Undergraduate in Computer Science,
University of Michigan, Ann Arbor
About Me
I am an undergraduate student studying Computer Science at the University of Michigan. Before Michigan, I studied Mechanical Engineering at the Joint Institute of Shanghai Jiao Tong University.
My research interests are human–computer interaction (HCI), vision–language–action (VLA) models, and the security of large language models. I enjoy problems where algorithms meet real people, real data, and real-world constraints.
Publications
General Accessibility Model: Understanding Accessibility Needs from Computer Use
CHI 2027 Papers · Under review
Demonstration of General Accessibility Models: Learning Accessibility Needs from Everyday Computer Use
UIST 2026 Demo Session · Accepted
Selected Work click / drag / ← →
Research & Publications · 2026
General Accessibility Model (GAM)
Human–AI Lab, University of Michigan · Prof. Anhong Guo
01 / 06
Research & Projects
The deck above highlights selected work. Here is the full record.
May 2026 – PresentResearchGeneral Accessibility Model (GAM)
Human-AI Lab, University of Michigan · Prof. Anhong Guo
Second author of GAM (UIST ’26 demo accepted; CHI ’27 paper under review), which learns users' accessibility needs by observing everyday computer use instead of explicit calibration tasks. Built the macOS multimodal capture pipeline (screen, assistive-technology audio, input, DOM) and the LLM reflection loop that yields confidence-weighted barrier propositions, applied to accessibility reports, feature recommendation, and just-in-time web repair.
2026ResearchWeather-Guard: Dynamic Contextual Guardrail for Agentic AI
Multi-institution collaboration · ICASSP 2027 (under review)
Co-authored a real-time guardrail for agentic AI interactions: an 82M-parameter DistilRoBERTa encoder, cascaded with regex rules, flags privacy and security risks within a <50 ms budget and surfaces them through weather-style risk cues and inline highlights rather than automatic rewriting. It outperforms larger models on zero-shot out-of-distribution privacy detection, and a study with nine families found most participants preferred transparent warnings with manual authorization.
Mar 2026 – PresentResearchBackdoor Attacks on Latent Reasoning Models
LIST Lab, Northwestern University · Prof. Yan Chen
Studying backdoor mechanisms on latent reasoning models with a focus on trigger injection and reasoning-specific attack behavior, and evaluating attack success, activation patterns, and robustness under reasoning-heavy benchmarks.
Sep – Dec 2025Course ProjectLLM-Driven Tennis Coaching System
University of Michigan, Ann Arbor
Built an end-to-end pipeline extracting pose landmarks from tennis videos with MediaPipe and Sport2D, using heuristic keyframe selection and phase-aware LLM prompting to synthesize personalized coaching feedback.
Aug – Dec 2025ResearchSparse Weight-Decomposed LoRA (SDoRA)
University of Michigan, Ann Arbor
Proposed a parameter-efficient fine-tuning framework combining weight decomposition with learnable sparse gating. Implemented the SoRA module, trained Qwen2.5-3B models, and analyzed sparsity dynamics and layer-wise pruning on BoolQ, PIQA, and ARC-c.
Nov 2024 – PresentResearchWater Jet Propulsion via Negative Pressure Energy Storage
School of Mechanical Engineering, SJTU
Constructed control logic in Simulink, explored reinforcement-learning-based optimization, and modeled spacecraft shell structures in SolidWorks.
Jan – Oct 2024ResearchMulti-Modality Federated Learning
School of Electronic Information and Electrical Engineering, SJTU
Reproduced federated learning algorithms such as FedAvg and Harmony in PyTorch, and explored ways to improve efficiency when processing multi-modal data.
Feb – Oct 2024Innovation ProgramCross Twin-Rotor Unmanned Helicopter
School of Electronic Information and Electrical Engineering, SJTU
Used quaternion representations to implement part of the aircraft control algorithm and contributed to mechanical assembly of the prototype.
May – Aug 2024Course DesignMars Rover Model
Joint Institute, SJTU
Handled 3D modeling for an introductory engineering design project, assembled the rover, and implemented part of its control algorithm.
Education
Aug 2025 – PresentUniversity of Michigan, Ann Arbor
College of Engineering · B.S. in Computer Science
GPA: 3.947 / 4.0
Sep 2023 – Jul 2025Shanghai Jiao Tong University
Joint Institute · Mechanical Engineering
GPA: 3.78 / 4.0 · Ranked 48 / 335
Skills
Programming & Modeling
Python, PyTorch, MATLAB, Simulink, Mathematica
Design & Prototyping
SolidWorks, Arduino, Raspberry Pi, 3D printing, CO2 laser cutting
Service & Teaching
Sep 2024 – Present
Vice President, ASME Student Branch
Joint Institute, SJTU
Organized workshops and lectures on mechanical engineering topics and maintained the branch's official webpage.
Sep 2024 – Jan 2025
Teaching Assistant, MATH1860J Honors Mathematics
Joint Institute, SJTU
Held recitations and office hours, prepared worksheets, and graded assignments and exams.
May & Aug 2024
Volunteer Teaching
Yingshang, Anhui
Gave basic physics and mathematics lectures for primary school students and organized extracurricular activities.
Contact
Email is the best way to reach me.