What are the three categories of engineering models?

China's Robot Troops Near India Border, Human-like Movements Catch Attention

Artificial Intelligence News & Technology on Instagram: "C Ray is an amphibious robot built for real world missions. It inspects reefs, maps the ocean floor, and monitors marine ecosystems without harming wildlife. It can detect underwater mines, collect data under ice, and explore areas unsafe for humans. Using flexible fins instead of propellers, it moves quietly and efficiently through water and over land. With autonomous control and advanced sensors, C Ray supports research, defense, and env