Chapter 368: It changed flavor as we chatted

Saturday.

At the intersection of Wusi Road, Xu Qingzhou looked at the girl glaring at him from the opposite side and said without giving up: "You really don't want me to go?"

"Xu Qingzhou, the meaning of life doesn't lie in being lovey-dovey. Can you have some pursuits?" Song Yao raised her eyebrows.

"I'm just going to study."

"Is that studying?" Song Yao exposed him. This guy knew everything; he was just going there to find excitement.

"Isn't it?"

"If you dare to come over, you're done for tonight."

After Song Yao finished threatening, she turned around and strode toward the School of Economics.

"Sigh."

Xu Qingzhou sighed. Being disliked by his girlfriend, he could only go find a classroom to study alone. Actually, he could stay at home, but staying at home all day made him look like a waste staying at home just like Er Miao.

The model Song Yao and the others needed only had to be finished by one person within three weeks.

Time wasn't tight. Xu Qingzhou planned to start the second scheme in the morning, go to Academician Chu Jiangfeng's side in the afternoon, and do the model later.

2:00 PM.

"You went to help at the School of Economics?" Chu Jiangfeng's hand holding the tea paused, and he was stunned for a moment.

"Yeah, Professor Li Daiyue's research group needed manpower to handle some calculation problems."

"You kid, people all say I learn things very broadly, but now it looks like your path is much wilder than mine."

Chu Jiangfeng said with a smile, but didn't say anything else, respecting his student's choice, and besides, it was his girlfriend's research group he went to.

"However, from my personal experience, trying different fields is a good thing; this is crucial for broadening horizons and enhancing capabilities, but one must also pay attention to trade-offs and not disperse energy."

"Thank you, Professor, for the reminder." Xu Qingzhou nodded seriously. If it weren't for the decades of experience from his previous life, he really wouldn't dare to be arrogant and touch everything.

Some people might have won at the starting line, but he was different; he had already run to the finish line.

Chu Jiangfeng shook his head and said with a smile: "It doesn't count as a reminder; you kid are much more powerful than us old guys."

"Indeed, it doesn't work. Here, the mapping ξ derived from integration by parts decays rapidly outside the rectangle... No way, unless you can stretch the calculation infinitely, but this is obviously impossible to achieve. At the very least, it cannot be achieved with current computing power."

"Right, so I want to try the second method. First, set q and x to satisfy the angular separation condition in this formula, and transform the goal into estimating..."

The whole afternoon, Xu Qingzhou was discussing math problems with Chu Jiangfeng.

Although Chu Jiangfeng wasn't engaged in local smoothing research, his eyes were sharp, and many times he could see the problem at a glance, giving Xu Qingzhou quite a bit of inspiration.

When it was time to leave.

"Qingzhou, you are still young, and there are many opportunities. If you find that this path doesn't work, slow down, adjust your strategy and methods, set a clear goal and plan, and wait until you have learned something before coming back to look at it."

"I've remembered it." Xu Qingzhou nodded slightly. Chu Jiangfeng's meaning was that if local smoothing research was difficult, he could also try others and not hang himself on one tree.

"Alright, I'm old and a bit long-winded. You kid, hurry up and go."

"Not long-winded, I love listening."

Xu Qingzhou laughed. Opportunities for an Academician to give earnest advice and teach life experience weren't many.

Chu Jiangfeng waved his hand.

Coming out of the office, he glanced at the messages and didn't go back to the classroom, but went straight home to change equipment and go to the playground to sweat with Song Yao.

Xu Qingzhou was busy for 2 consecutive weeks, with the ARIMA model and local smoothing research advancing simultaneously.

Song Yao was also very busy, following Li Daiyue to the Magic City (Shanghai).

It wasn't until December 8th that the two decided to give themselves a holiday.

12:00 AM.

The twilight was thick, and the snow that had just stopped in the morning was falling heavily again at this time. There was a layer of ice crystals on the glass. Song Yao was wrapped in pajamas, her fingers sketching on the glass.

In front of the table, Xu Qingzhou was lowering his head to calculate.

The progress of the ARIMA model was going quite smoothly.

But the method of transforming the goal into estimation in the local smoothing research also didn't work.

Xu Qingzhou prepared to grind it out.

After a while, Song Yao turned around, revealing her masterpiece on the glass—two little people—and asked for Xu Qingzhou's opinion: "How is the drawing?"

Xu Qingzhou glanced twice at the two little people drawn with the help of the heat. They were too ugly.

"Don't ask me such a difficult question. Also, the couples others draw are all sweet and honeyed scenes of leaning on each other. Why is the one you drew of you beating me?"

"Don't you like it?"

"..."

Song Yao narrowed her eyes, walked over, and messed up Xu Qingzhou's hair from behind: "My skill points might all be added to beauty and intelligence."

"No, I think more are added to force." Xu Qingzhou found that the "School Beauty" Song didn't have a clear understanding of herself.

Song Yao curled her lips and rubbed Xu Qingzhou's face a few times: "I'm going to sleep. You... um, go to bed at 12:10, hear me?"

"Yeah."

Seeing Xu Qingzhou agree, Song Yao yawned and kicked her way to the bedroom.

Xu Qingzhou shook his head and focused his gaze on the formula in front of him.

Here, one can use φ(x, t) to represent the inverse mapping in (5.18). Under the new coordinate system, the phase function transforms into other functions, but...

Xu Qingzhou calculated with his pen for a long time.

【In one look...】

10 minutes later.

"Hoo~"

Xu Qingzhou slowly exhaled. Still not working. After staring at the manuscript for a long time, his heart moved: if both sides were summed for all m...

Maybe there's a chance.

Soon, there was the sound of rustling writing in the living room.

"Xu Qingzhou, go to sleep."

Xu Qingzhou was pulled back to reality by the sound from the bedroom.

"Just a while."

Xu Qingzhou replied without raising his head. One formula after another appeared from under his pen. A moment later, he suddenly raised his head: "Damn, still not working?"

He felt a bit numb.

He was just about to pick up his pen to continue fighting when a faint voice suddenly sounded in his ear: "Sleep, or get beaten by me and then go to sleep."

Xu Qingzhou turned his head and saw Song Yao's stinky face. He glanced at the time—whoa, it was already 12:30.

He immediately laughed dryly: "Oh my, it's so late already, sleep, sleep."

He ran back to the bedroom, pattering along, and hid under the covers.

It was warm, fragrant, and refreshing; even his fatigue had lessened.

Having a girlfriend who warms the bed is just great.

Xu Qingzhou felt a wave of emotion in his heart.

Song Yao stood at the doorway, watching her boyfriend obediently burrow into the covers, and hummed softly.

She could tell that this guy was prepared to grind away at math problems.

Splitting hairs.

He had said last time that he could advance or retreat at will, yet wasn't he still stuck?

If he couldn't solve a math problem, so be it; he could just study it again tomorrow. His body was his own—didn't he know that staying up late hurts the kidneys and the body?

"Jiahui asked if we want to spend New Year's Eve together."

Lying on the bed, Xu Qingzhou relaxed all at once. "Let's do it; it's livelier with more people."

"Okay, I'll tell her. The new year should start off lively."

Seeing that Xu Qingzhou still seemed to have his eyes open, staring foolishly at the ceiling, Song Yao poked his face. "Still thinking about math problems?"

"Yeah, considering whether to start the third plan early."

Song Yao looked at him with disdain. "Pfft, someone said last time that he could advance or retreat at will, yet wasn't he still stuck?"

"Yes, I need to be as relaxed and flexible as you. Why is this conversation of ours getting so weird?"

"Shut up!"

"."

(End of chapter)