I failed a course, and the system became my study supervisor.

Chapter 65 PEME Simulation Verification
By the second Monday of the exchange activity, the topics of each group had been completely determined and the research on the topics had been fully launched.

Almost all groups are researching technical optimization of battery capacity, and Xu Ling's group seems to be the only one that has taken a different approach.

Inside a small electronics laboratory.

"I'll show you how to use this PEME. Please pay attention."

Shen Huanan reminded.

Xu Ling and Yu Wenkai immediately put away their nonchalant mood and watched Shen Huanan's demonstration intently.

"Here you can create a new simulation model, and the system comes with a basic PEMFC."

"And below that, there's a word, 'parameter'. Do you see it? It's for adjusting various parameters."

"After setting all the parameters of your design, click 'run' to simulate directly."

"Okay, that's about it. Try it yourself first, and ask me if you have any questions."

Shen Huanan said sympathetically.

In fact, PEME is just a computer program, its functions just look very advanced, so Xu Ling and Yu Wenkai figured out most of its functions after a quick start.

After figuring it out, Xu Ling couldn't help but ask:

"Teacher Shen, can you install this PEME on our computer? I can use it when I return to school."

"Uh, this shouldn't be possible."

Shen Huanan held his forehead, speechless.

He didn't expect Xu Ling to ask such a question.

Yu Wenkai on the side also wanted to laugh.

This is what a naive freshman is like.

Only Xu Ling felt a little embarrassed, digging his toes into the ground.

"By the way, where did you find that paper?"

Shen Huanan changed the subject in an attempt to ease the awkwardness.

Before Xu Ling could say anything, Yu Wenkai answered: "Xu Ling wrote it himself."

Huh? You're telling me this freshman wrote such a great paper?

What about playing?
Is it so easy to write a paper?

Shen Huanan was extremely surprised and stared at Xu Ling, as if he wanted to see through Xu Ling's soul to see if he had been possessed by some old monster.

Xu Ling was still very embarrassed being stared at like that.

The atmosphere suddenly became a little weird.

After a moment, Shen Huanan came back to his senses and said slowly: "Well, that's very good."

Xu Ling still couldn't forget the previous question:
"Teacher Shen, is there a mathematical algorithm for PEME? I'd like to study it."

Why are you asking this? You don't want to make one yourself, do you?

Shen Huanan's pupils trembled again, but he soon felt relieved. It took nearly a month to complete the task even with the help of the School of Computer Science and the School of Mathematics.

This student Xu Ling is a bit whimsical.

But he still told Xu Ling: "There's a paper from our school in the journal 'Power Technology'. You can just search for the keyword PEME. It should be the latest in China."

Xu Ling was immediately grateful.

In fact, Xu Ling really wanted to create a PEME if Shanghai University didn’t have one.

But he didn't get so arrogant as to say he would do it himself.

Wouldn't it be enough to present the algorithm to the school and give them some suggestions?
If the school still doesn't intend to invest, we can find another way.

"Okay, stop wasting time and run through the scenarios in the paper first."

Shen Huanan urged.

Xu Ling and Yu Wenkai immediately began setting the parameters.

But, these parameters are a bit too many!

From geometry to material properties, to operating conditions, there's more. There are also electrochemical parameters and boundary conditions. Each of these parameters has its own specific sub-parameters.

With so many parameters, this algorithm is quite powerful!

Xu Ling couldn't help but sigh.

After setting the parameters, Xu Ling began the simulation, primarily to see if the changes in the PEMFC's characteristic curves when the power suddenly changes from low to high match the theoretical derivations. "Is this image reasonable? Can the supercapacitor be connected?"

Yu Wenkai asked.

After all, the paper was written by Xu Ling, so he was somewhat unfamiliar with it.

Xu Ling first carefully observed the direction of the graph, and then used functions to carry out a series of calculations.

its not right?
How come it’s just that little bit off?

The derivative value of the theoretical graph at the inflection point is slightly too large, and the slope of the secant line in the small section where the power changes suddenly also has some deviations.

"Simulate it again."

Xu Ling said solemnly.

Yu Wenkai didn't say anything and silently restarted the program.

What happens if we just run the simulation again? The parameters are the same.

"Maybe there's still something wrong with my theoretical proof."

Xu Ling felt a little frustrated but more confused. Many theoretical analyses were already in the system, so how could they be wrong?

At this moment, Shen Huanan, who had been observing for a long time, suddenly asked, "Is there a big gap between theory and simulation?"

Big? Not really.

There may just be a few percent deviation.

Xu Ling immediately explained to Shen Huanan.

"Then don't worry. This is just a simulation, not an actual battery. A little error is normal, right?"

Shen Huanan reminded.

Yes! This is just an algorithm.

There are errors between my own theoretical analysis and reality, and there are also errors between this simulation and reality.

So is it worth making a fuss about the discrepancy between theory and simulation?

Xu Ling suddenly understood, but he still felt a little worried.

"Well, here's a PEME error analysis program. Try it."

Seeing that Xu Ling still hadn't dispelled his concerns, Shen Huanan continued.

Xu Ling suddenly became excited and quickly input the results of theoretical analysis and simulation.

The result was exactly as Shen Huanan said. According to the final calculation results of the program, the error was within an acceptable range.

"So, don't doubt yourself first, believe in yourself."

Shen Huanan patted Xu Ling on the shoulder and spoke earnestly.

Xu Ling also kept it in mind.

So far, Xu Ling has completed the verification of the existing theory.

The paper is considered complete after all simulation results are added.

But Xu Ling was not satisfied. He had finally seized this opportunity and could not let it end like this.

Xu Ling also needs to explore optimization solutions for the ABS system.

“In fact, it’s pretty good.”

Yu Wenkai said tentatively.

"No, there's still so much time left. We need to see if we can optimize it."

Xu Ling decisively rejected it.

"Well, it's your paper anyway, so you have the final say."

Yu Wenkai is very satisfied, and he certainly hopes that this battery system will be the best.

Similarly, Shen Huanan would certainly not interfere with Xu Ling's decision.

Scientific research, of course, requires continuous improvement.

At the same time, Shen Huanan couldn't help but admire this student who was not from this school.

How about talking to Dean Chen and trying to find a way to get this student here directly? If that doesn't work, you can let him choose Hong Kong University of Science and Technology for his master's degree?
At this moment, Xu Ling, who was studying his thesis, couldn't help but feel a chill on his back.

(End of this chapter)