The arid landscape required extensive irrigation systems, and principles of shared labor made sense to people who were inspired by the theories of Karl Marx and Robert Owen.

Symbolic dynamical system is a powerful tool in the study of dynamical systems theories, the study of dynamical properties of the general symbolic dynamical system is a far unsolved problem.

In the study of modern control theories, pole assignment and LQR are designed on inverted pendulum systems, and the MATLAB simulation is researched.