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

Chapter 9: Choosing a course? No! Grab a class!
"I love you walking alone in a dark alley, I love the way you don't kneel..."

At 7:30 in the morning, the alarm clock rang.

Without any hesitation, Xu Ling quickly got out of bed and washed up.

At 7:45, Xu Ling was already sitting in front of the computer, waiting eagerly.

In fact, there is no need to pay attention to the order of the first round of course selection, as long as you choose the courses within the specified time.

Anyway, we have to draw lots in the end, so it makes no difference who chooses first or later.

Xu Ling knew this very well, but he put so much anticipation into this course selection that he wanted to get up in the middle of the night to choose it.

After confirming several times to make sure he had made the right choice, Xu Ling cautiously turned off the computer.

What does it mean to be cautious? It means dragging the mouse slowly along the edge of the screen, for fear of clicking a button that will cancel the course selection.

From the time he chose his courses to the end of the lottery, Xu Ling was always anxious.

However, the draw did not give him what he wanted:
He failed both electromagnetism and linear algebra.

But it's not completely without chance, because only 90% of the people directly choose the course through lottery, and the system reserves 10% of the places for supplementary enrollment.

Obviously, the competition for these 10% of places is extremely fierce. Specifically, Professor Zhang's course has a capacity of 50 people, so there are only 5 places available.

When the course selection was completed, Xu Ling watched as the total number of people participating in the lottery was 180.

But Xu Ling did not give up. The fight for the last few spots was purely a matter of hand speed, and he had no reason not to give it a try.

17: 59!

Xu Ling stared at the time in the lower right corner of the computer, with his index finger on the left mouse button, ready to go at any time.

18: 00!

At the moment when time jumped, Xu Ling quickly clicked the course selection button.

Success or failure depends on this moment!

But, contrary to expectations, a red exclamation mark popped up, followed by a gray text:

[The course capacity has been reached. Please choose a course from another teacher.]

Depend on!
Who on earth was chosen to take this class? Is his hand speed so fast?

Xu Ling was extremely frustrated and even felt a little resentful.

There was no other choice, Xu Ling had to choose one of the courses that were not fully enrolled.

However, just as Xu Ling was about to choose a course with just over half the students, the phone on the table vibrated.

"Buzz"

Since no one was interested in this class, Xu Ling picked up his phone directly, and it turned out to be a Penguin message from Wang Xueqin.

Xu Ling? Have you finished your course selection? I suggested you take Professor Zhang Zhongyao's class. Did you choose it?

Without typing, Xu Ling replied by typing several crying faces in a row.

[You didn't choose it? Have you chosen other teachers' classes now?]

[Not yet. The remaining teachers are hard to choose from! They are all "notorious and full of evil" in the course review community.]

[Haha, some teachers are indeed irresponsible. There's a solution!]

Seeing that there was still hope, Xu Ling suddenly became excited and replied excitedly:

【How to say? 】

I'll give you Mr. Zhang's email address. Please send him an email explaining the situation. I'll also talk to him about it. I think we can add a spot for the course.

[Thank you, Teacher Wang!] Xu Ling was overwhelmed with emotion and quickly typed out his thanks.

Actually, what Xu Ling wanted to say was, "I love you so much, Teacher Wang."

But something is wrong, isn't it?
After getting Professor Zhang Zhongyao's email address, Xu Ling immediately started editing the email on his computer.

Worried that he might have made a mistake, Xu Ling specifically searched for the correct format of the email and checked it several times.

After clicking send, Xu Ling still couldn't calm down for a long time.

Who could have imagined that? Just when he thought the situation was over, something unexpected happened, sending Xu Ling's mood careening up and down like a roller coaster.

While waiting for a reply, Xu Ling was still a little nervous. Would Professor Zhang break the original planned limit for him?
It was not until two hours later that Xu Ling received a reply from Professor Zhang that he felt relieved.

"Student Xu Ling, after reading your email and hearing my students' recommendations, I've decided to add a place for you in the course. I hope you'll benefit from my class!"

These were the exact words in the email. Xu Ling had no idea how many times he had repeated them in his mind, his smile reaching his ears.

When receiving the reply, Xu Ling also sent a thank-you text message to Wang Xueqin.

Without her guidance, how could Xu Ling have had the opportunity to choose this course.

I love you so much! Teacher Wang!

Xu Ling shouted in his heart.

As for linear algebra, which he also failed to get into, Xu Ling was not so particular and chose a course taught by a teacher with a slightly better reputation.

This teacher, also surnamed Zhang, is called Zhang Yongjie. Students describe him as follows: "Too much homework! And he likes to cover topics beyond the syllabus!"

For an ordinary poor student, taking a course from such a teacher is tantamount to going to jail.

But Xu Ling is an extremely poor student, so this kind of teacher is perfect for him.

I have chosen the courses, but the results of the make-up exam are not out yet. All I can do now is study the previous physics equations.

Before ten o'clock, Xu Ling reviewed the content of the systematic explanation the day before, and then read some additional materials he had collected.

Ten o'clock arrived quickly, and this time the system began to focus on using Fourier analysis to discuss the problem of global solutions with small initial values.

"After Fourier transforming the incompressible Navier-Stokes equations, the partial differential equations can be converted into ordinary differential equations, making the solution easier.

In the frequency space, each term of the equation has a clearer physical meaning and mathematical structure, which facilitates the analysis of the properties of the solution, such as the growth, attenuation, and stability of the solution.

……

When studying the stability of a solution, Fourier analysis can be used to analyze the impact of initial value perturbations on the solution.

The disturbance term is decomposed in the frequency space, and the change of the Fourier coefficient of the disturbance term is estimated to determine whether the disturbance will be amplified with time, thereby proving the stability of the solution under small initial values.

That is, when the initial value is slightly perturbed, the corresponding solution maintains similar properties in global time.

......"

So that’s it!
After the systematic and focused explanation, Xu Ling's understanding of this issue became deeper. He felt that he had vaguely grasped some important clues.

However, what Xu Ling did not notice was that the experience points in mathematics and physics in his personal panel had also increased slightly.

After the video finished playing, Xu Ling still checked the taskbar. He finally relaxed when he saw that the task was not yet completed.

The course selection was completely completed, and Xu Ling's personal course schedule was automatically generated.

On Monday, which is tomorrow, the first class in the morning is Professor Zhang Zhongyao’s electromagnetism course.

Xu Ling's heart was full of anticipation.

(End of this chapter)