Core Viewpoint - Iran has utilized artificial intelligence to create a video demonstrating a simulated military operation against the U.S. Navy's "Abraham Lincoln" aircraft carrier and other warships [1] Group 1 - The video outlines a sequence of operations where Iran plans to deploy various military assets including reconnaissance and strike drones, anti-ship ballistic missiles, high-speed attack boats armed with short-range anti-ship missiles, suicide drones, and mini submarines equipped with torpedoes [2] - Iran intends to lay mines and anchor mines in the Strait of Hormuz, followed by a final strike using cruise missiles, emphasizing a strategy of asymmetric warfare and unconventional tactics against the U.S. naval fleet [2] - After executing these multi-wave attacks, Iran aims to negotiate for a "decent withdrawal" to minimize its own casualties [3]

Core Viewpoint - A research team led by Professor Ding Yang from Beijing University of Posts and Telecommunications has discovered a phenomenon called "thrust reversal" in propellers operating in specific fluid environments, challenging traditional understandings of propeller mechanics [1] Group 1: Research Findings - The study reveals that at millimeter to sub-millimeter scales, clockwise rotating propellers do not propel micro submarines forward but instead cause them to move backward [1] - The research indicates that in different Reynolds number environments, objects exhibit distinctly different motion characteristics [1] - At ordinary scales, propellers generate forward thrust by pushing water backward, while at smaller scales, the water flow is deflected outward, creating a suction effect at the propeller's center that pulls the submarine in the opposite direction [1] Group 2: Implications - This discovery has significant implications for applications such as micro medical robots and pipeline inspection devices, which often measure only a few millimeters in size [1] - Traditional propeller propulsion systems may fail in these small devices, necessitating research into how to adjust parameters to mitigate or utilize this centrifugal suction effect [1]