PFUSR-34: The Coupling-Interface Adaptive Valve Model — Formal Establishment

This paper serves as the in-depth expansion, formalization, and physical substantiation of the 33rd paper in the PFUS system. It focuses on the scientific and systematic refinement of the core mechanism, conducts rigorous demonstrations on the model structure, dynamic entity, operational principles, and physical inevitability, and formally establishes the coupling-interface adaptive valve model, making it the second-generation core dynamic model in the PFUS system after the double-cone geometric model.