- Complete GUI application with tkinter
- Physics-based calculation engine with Debye model
- Multi-stage cooling time analysis
- Interactive visualization and charts
- Cryostat structure schematic diagram
- Dual language support (Chinese/English)
- Comprehensive documentation and tests

Features:
- Parameter input with real-time validation
- Multi-threaded calculations
- Cooling curves and heat capacity visualization
- Heat leak analysis
- Engineering time estimates
- Project structure optimization