Genius Girlfriend

Chapter 4: K-means clustering algorithm

Lin Zhixia's family situation is not what Jiang Yubai imagined.

Jiang Yubai once thought that Lin Zhixia also lived in a manor, and there were many tutors to tutor her every day. However, according to Jiang Yubai's own eyes, Lin Zhixia was born in an ordinary place. Lin Zhixia's parents did not indulge in spoiling her-she wanted to eat a strawberry-flavored lollipop, but her mother relentlessly refused.

Jiang Yubai's parents also restricted his snacks. Thinking of this, Jiang Yubai had another sympathy for Lin Zhixia.

The chefs in Jiang Yubai's family are good at making Chinese pastries. In recent days, the osmanthus trees in the garden have bloomed. The chefs picked fresh flowers to make a basket of "Crystal Osmanthus Cake". The main ingredients include Northeast special rice, Hainan coconut oil, Gansu Tianshui honey. These pastries are fragrant and soft, yet glutinous but not greasy. They are worth a try.

That morning, before Jiang Yubai went to school, he found a clean lunch box, secretly filled a dozen osmanthus cakes, and brought it to the school for Lin Zhixia to eat.

Just after the morning reading class, Jiang Yubai put the lunch box in front of Lin Zhixia.

Lin Zhixia was puzzled: "What is this?"

"Osmanthus cake," Jiang Yubai pretended to be indifferent, "sweet."

Lin Zhixia opened the lunch box, and the fragrance immediately overflowed. She had never seen such a beautiful pastry, and couldn't help but ask: "Where did you buy it?"

"It's not available on the market," Jiang Yubai introduced honestly, "this is made by my chef himself..."

Before he finished speaking, Zhou Bufeng, who was sitting in front of him, suddenly turned his head, grabbed two pieces of pastry and stuffed it into his mouth. While taking advantage of the fire, Zhou Bufeng exclaimed loudly: "Damn! This is so delicious... it's so delicious that I'm choking to death! Everyone comes to try it... Brothers from the fourth grade class!"

Zhou Bufeng's tablemate is a girl named Gan Shuli. Gan Shuli has always been a quietly introverted girl who doesn't like to talk. She still draws a "38 line" with correction fluid on the desk to prevent Zhou Bufeng from contacting herself. Usually, Zhou Bufeng talks to her, she never ignores it.

But now, several classmates who came to the class all tasted the sweet-scented osmanthus cake Jiang Yubai brought.

Gan Shuli did not eat breakfast today. She couldn't help reaching out and grabbing a piece from the lunch box, responding to Zhou Bufeng's call.

Seventeen sweet-scented osmanthus cakes were divided up in a blink of an eye.

Lin Zhixia didn't even taste a bite.

Jiang Yubai felt puzzled. He asked Lin Zhixia: "Why are you watching them grabbing?"

Lin Zhixia said: "I didn't want to eat Zhou Bufeng."

Jiang Yubai asked again: "I have a fight with Zhou Bufeng, will the students sue the teacher?"

"It's useless to sue," Lin Zhixia said calmly, "because the teacher will definitely help you. But I still think you shouldn't fight with him...fighting won't solve the problem. If you hit him today, he will Always remember."

Jiang Yubai tried to suppress his anger. He threw the lunch box into the trash can, sat back in place, and wiped Lin Zhixia's desk with a paper towel. At this time, Zhou Bufeng turned his head and laughed at him: "Jiang Yubai, you are Lin Zhixia's follower, hehe."

Jiang Yubai remained silent.

Zhou Bufeng pushed Jiang Yubai's stationery box: "Jiang Picong, Jiang Picong, hehe."

Jiang Yubai adjusted his breathing. His cheeks flushed slightly and his eyes became cold and serious.

Perceiving the extraordinary atmosphere, Zhou Bufeng couldn't help but provoke him: "You are the same table with the freak, weird! Haha."

Jiang Yubai is disgusted with the term "freak" used by others to describe Lin Zhixia. He pulled Zhou Bufeng by the collar and lifted him from his seat. Pencils, erasers, pencil cases, and correction tapes were scattered all over the place, and the tables and chairs nearby were swaying. Zhou Bufeng's expression stunned, and Jiang Yubai's wrist was pulled back. Zhou Bufeng's nasal cavity extruded an angry muffled voice: "What are you doing!"

Jiang Yubai twisted forward with one hand and successfully threw away Zhou Bufeng. In the aisle formed by the desk, Jiang Yubai took a step back, suddenly raised his leg, his knee was about to hit Zhou Bufeng's abdomen.

Zhou Bufeng collapsed immediately and escaped the blow, but Jiang Yubai stepped on his left leg.

At exactly this time, the math teacher came in.

The math teacher's surname is Qian, and she is probably in her early forties. She is a certified "senior elementary school teacher". Teacher Qian always wears a pair of gold-rimmed glasses and observes the class through reflective lenses.

Teacher Qian usually speaks softly and quietly. As soon as she entered the door today, she said in a deep voice, "Who is fighting in the corner? You are fourth-grade students! You are not children! How can you fight? Get out of here. The head teacher’s office! The head teacher asks you to come back, and when you come back, no one should enter my classroom, just stand in the corridor! Let the whole grade see! Who dares to fight!"

When she fell behind, Zhou Bufeng rushed out of the classroom.

Jiang Yubai still stood in place.

He has never been scolded by the teacher. He couldn't react temporarily.

In the spacious and tidy classroom, Teacher Qian put down the ruler and the compasses, with both hands on the podium, and pointedly criticized: "Some students, in order to save you face, I will not name you. But you Know who I’m talking about... I tell you, don’t think that your family’s conditions are good, if you have a little money, and a little capital, you can do evil and prestige in our school! Before you become a student, you must first learn to be a human being I don’t care whether you are returning from Singapore or New Guinea, as long as you use violence in the class and find someone to fight, you are wrong! I tell you, hey, do you understand? How old are you guys, something happened , You can only use your fists to solve problems? Have you never studied mathematics? Don’t you know logical thinking? Don’t fight where you are studying! I warn you! I criticize you once! You go to the principal to sue me. I have been teaching for more than 20 years, and I will not teach students who can only fight!"

Teacher Qian's last sentence made a loud noise.

Jiang Yubai's face was hot and burnt panic, as if he had been slapped in the face. Especially the phrase "Don't fight where you are studying" made him feel extremely ashamed.

He walked out of the classroom without a word and walked to the head teacher's office.

Lin Zhixia stared at him blankly.

This class has been very long.

Finally, when the bell rang after class, Lin Zhixia was the first to rush out of the classroom. She saw Jiang Yubai and Zhou Bufeng both standing in the corridor. The distance between the two was four meters long.

"Jiang Yubai?" Lin Zhixia called to him.

But he ignored her.

Lin Zhixia said softly: "Mr. Xiao Jiang."

Jiang Yubai supported the stainless steel guardrail: "Don't call me Xiao Jiang."

"What are you thinking?" Lin Zhixia asked, standing beside him.

"I know Zhou Bufeng can't beat me," Jiang Yubai admitted frankly, "I want to beat him to tears."

When Zhou Bufeng heard Jiang Yubai's words, he stretched his legs and ran farther. Gradually, there were more students in the hallway. Their soles rubbed against the plastic floor, and they made a squeaky-squeaking sound.

Jiang Yubai turned around, looked at many classmates, and changed his words: "But, I learn martial arts...not to beat classmates."

"It's great that you can think like this," Lin Zhixia replied, "When you lift your leg to hit Zhou Bufeng, I expect your impulse will be very strong, it's not a joke. I was also scared."

Jiang Yubai asked without shame: "What is impulse?"

"A vector describing the cumulative effect of force on time." Lin Zhixia explained concisely.

Jiang Yubai stood straight and nodded frequently.

"Do you understand?" Lin Zhixia asked knowingly.

"No." Jiang Yubai said honestly.

Lin Zhixia was not discouraged, and told him patiently: "Life is like a K-means clustering algorithm. We all randomly selected reference points at the beginning and didn't know where we were standing. Later collected As data changes, our reference points are also starting to update. We are at different reference points, and we observe the same things, and we will get different conclusions. People are constantly growing and adjusting reference points... For example, before this class, you think it’s okay for boys to fight. After this class, before you do it, you may also think about it."

Jiang Yubai stared at her: "K-means clustering algorithm. Thank you, I learned it."

Lin Zhixia smiled sweetly: "Mathematics can make people feel happy, and it can also make us think about life."

As the representative of the Chinese class, Lin Zhixia will go to the teacher's office to hold a stack of workbooks between classes. She happily walked to the door of the office. The door was ajar, and the class teacher's voice came from inside.

The head teacher smiled and said, "Teacher Qian, you calm down. Jiang Yubai's father is a big taxpayer in our province. Their group contributes a lot of GDP a year and can attract foreign investment. The principal told me that Jiang Yubai's family There are people in Beijing. Don’t worry about him. He’s still a child. He is usually very polite."

Teacher Qian replied: "I didn't care about him. I just entered the classroom and saw that he knocked down Zhou Bufeng and stepped on someone's leg... Isn't this bullying a classmate?"

"Hey, Zhou Bufeng, this kid often causes troubles in our class," the head teacher defended Jiang Yubai, "Zhou Bufeng's parents work in Shanghai. He is taken by his grandparents, and he is not stealing things in a day or two."

Teacher Qian was a little surprised: "He stole something?"

The class teacher described: "Last year, your office was opposite, and you didn't come with me. At that time, the classmates in our class came to me and you didn't hear. Zhou Bufeng stole the class leader's pocket money and Gan Shuli's pen... He can't control himself. I talked and talked, persuaded and persuaded, it was useless."

Teacher Qian sighed, "The kids nowadays, that's amazing."

The head teacher said: "Jiang Yubai is okay. He is very tutored."

The teacher's maintenance of a student was summarized as "Schrödinger's maintenance" by Lin Zhixia.

The so-called "Schrödinger's state" is also quoted from "Quantum Mechanics", which refers to a state that is both true and false.

Lin Zhixia fell into her own thinking.

When returning to her seat, Lin Zhixia shouted: "Jiang Yubai."

"What's the matter?" Jiang Yubai answered.

Lin Zhixia pulled away the stationery and books on the table and confided to Jiang Yubai very sincerely: "Only you in the class are willing to listen to me talk about mathematics and physics, although you always don't understand me..."

Jiang Yubai always took a serious attitude and listened to Lin Zhixia's various thoughts, but she seemed to have known that he could not understand it. He sat upright stiffly, defending palely: "I will understand gradually."

Lin Zhixia said: "At that time, I must have graduated from elementary school! I may never see you again."

Jiang Yubai's math notebook was almost ripped apart. He held a Parker pen and answered carefully: "Never see you again?"

"Yes," Lin Zhixia was sincere, "I want to formally invite you to be my object of human observation while we are at the same table. I have always wanted to understand... how ordinary people think. For example, you see Xi What's the first reaction to the problems related to Albert space? Do you have headaches or timidity? Hahahahahahaha."

A few minutes ago, Jiang Yubai was deeply moved by Lin Zhixia's comfort. Now, he just wanted to wake himself up with a punch, open his eyes and look at Lin Zhixia! She is still the same!

Jiang Yubai asked calmly: "Why did you choose me as your object of human observation?"

Lin Zhixia is very honest: "I heard from the class teacher that your family is a big taxpayer in our province, contributing a lot of GDP a year, and your family has foreign-funded enterprises. Your knowledge must be broader than others. I will study you, which is equivalent to one time. Sex studies many people."

Jiang Yubai thought for a moment, and reluctantly agreed to her: "Okay."

"Thank you!" Lin Zhixia was in full bloom.

She said softly: "Jiang Yubai, you are really my good friend."

Jiang Yubai was silent.

After this class, Ding Yan came to play with Jiang Yubai.

The sky light by the window spilled on the pages of paper, and Ding Yan clearly saw that Lin Zhixia had written "a summary of preliminary studies on ordinary human thinking patterns" on a draft paper.

Then, Lin Zhixia started a new line, wrote "summary", and clicked two colons.

Lin Zhixia solemnly recorded: This article further explores the thinking mode and thinking limitations of ordinary humans by observing the author’s tablemate, Jiang Yubai...

Ding Yan was taken aback.

He put his hands in his trouser pockets and called Jiang Yubai out of the classroom.

As soon as he walked outside the door, Ding Yan asked, "Jiang Yubai, you can bear this? You go to Teacher Wu and change your seat?"

Jiang Yubai shook his head: "I have a battle plan. Let her taste the sweetness first and relax her guard."

Ding Yan didn't understand very well: "Do you want to be nice to her?"

"No!" Jiang Yubai denied, "I regard her as a competitor."

Ding Yan looked confused: "Do you think you can compete with her? I heard people say that she only needs to read the endorsement once. I recite the text for 30 minutes, and she recites the text for three seconds."

She recites the text for three seconds.

Yes, the opponent is very strong.

Jiang Yubai clenched his fist slightly. He will not give up. He will prove himself in front of Ding Yan and Lin Zhixia, far surpassing Lin Zhixia, throwing her behind his back, and recovering the self-esteem that was crushed by her.

He said: "Lin Zhixia's birthday is coming soon."

Ding Yan looked nervous: "What are you going to do?"

Jiang Yubai stood behind a pillar, and the staggered light cast on him, illuminating his entire face in half light and half darkness.

He is like the most handsome robber in the Hong Kong movie "Young and Dangerous", with a heavy burden that is not his age: "I will give her a gift."

Ding Yan shuddered.

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