research Multimodal Traffic Accident Grounding System Zero-shot accident time/location/type grounding from real CCTV using frozen VLMs (Qwen3-VL + Gemini 3.1). Chain-of-Thought Distillation SFT vs. DPO/ORPO for reasoning alignment on Flan-T5-Base. engineering AI Dancing Coach Gemini-powered dance coaching system with RAG-based technique feedback.