Suggestions

Hi Dandan Wang, Awesome page! I learnt a lot about how control theory works and its applications. Few of suggestions:

1. Some of the diagrams could be a bit bigger to enhance readability. Few of them were in next section.
2. In the equation $u=\pi (x,\alpha ,t)$ I am not clear on what is $\alpha$
3. In the adaptive control part,

${\dot {x}}=A_{i}x+B_{i}u$
$y=C_{i}\top {x}+D_{i}u$
what is the Ţ ?

1. I found some grammatical errors. Ex- "mechanism that can alters", "the knowledge base is used to behave","a visitor might have already leave the page".