"The overall approach is correct. Who did this calculation?" Song He asked.
"I did," Ding Yangze said.
Song He was surprised. "Not bad! Your math skills have improved!"
Ding Yangze wore a helpless expression. "At this level of research, it's impossible to take a single step without understanding mathematics. Ji Tianhe tutors me every day, so I've been gritting my teeth and studying. Studying gives me a headache every day."
"Let's give you an even bigger headache and go over a few details." Song He took out a pen and pointed at the calculation steps. "Your calculation error is quite large."
Ding Yangze hurried over and looked at it attentively.
"Look here. A periodic pseudo-orbit passes near the equilibrium point, and it has a large amplitude. A dynamical system with a stable equilibrium point should be regarded as excitable..."
"A slight perturbation of the vector field can make t2 and t3 converge here, turning them into a periodic orbit..."
"What is point p? It's an equilibrium point. A perturbation here will cause a large deviation in the solution, but will the solution return to the equilibrium point?" Song He asked.
"No." Ding Yangze seemed deep in thought.
"So this type of neuron is also near a bifurcation. Perturbations in the vector field bring the equilibrium close to the basin boundary, causing it to lose stability..." Song He continued explaining.
"You also need to pay attention here. You calculated this according to the crude division between type I and type II neurons. Type I neurons have a firing frequency of five to 150 hertz, while type II neurons have a firing frequency of 75 to 150 hertz. But the Sea Monster's brain is far too complex. It would be best to refine the categories further..."
"And here. This is a subcritical