Yifeng is a Research Scientist at NVIDIA. He received his Ph.D. in Computer Science from Stanford University, where he was advised by Prof. C. Karen Liu. His research explores methods that combine machine learning with physics-based simulation to build AI-driven digital humans and to enable humanoid robots with naturalistic movement. Beyond motion generation, he has worked on human motion inference from wearable sensors such as smart glasses, and on next-generation human simulations for biomechanics and healthcare applications.