Genius Fundamentals - Chapter 161

Lin Chaoxi was taken seriously by the shoulders.

She jerked her head and Pharaoh looked at her thoughtfully.

“Apprentice, are you hanging up or the system delays response, calling you for a long time.”

“It may also be a crash.” Ah Guang interjected.

“In any case, the answer has already been revealed!”

A Guang’s eyes were so big that his eyes burst into excitement. And the old king is squinting, a win is in the grip.

Lin looked at them and decided to wipe out the last sentence of the paragraph.

She couldn’t help but think of the words that she said when she selected the players.

She asked, picking up teammates to find friends who can understand each other.

裴 说 :: Find a teammate with the same goal.

Pharaoh’s goal is to get a bonus. Aguang’s goal is to help Lao Wang get the bonus. Her goal is to win. In summary, which question to choose is indeed clear.

“Cough” Lao Wang cleared his throat. “According to the regulations of the General Assembly, for the sake of fairness, to show democracy, my group will vote by secret ballot.”

When the old king finished, he stabbed, teared off the last page of the notebook, and handed it to them in three.

Lin Zhaoxi looked at the blank paper in front of him, surrounded by the discussion of the students who participated in the modeling competition.

“Just choose this, just choose this.”

“Oh, essays are too accurate. Let’s get started, time is tight.”

Surrounded by such a voice, she took out the pencil case from the bag, and the letter written by Lao Lin was pressed underneath.

She opened the zipper and held the pencil, but she did not write down her choice.

Pharaoh and Aguang had already finished writing early, throwing the paper ball into the middle of the table and waiting for her.

This is completely meaningless, but such a ritual makes them feel safe in their numbers.

Lin Chaoxi palm was slightly wet, she put down the pencil, looked at the pharaoh and Aguang, solemnly said: “I want to choose b.”

At that time, she had already laid down the draft and prepared to convinced the two men. But Pharaoh was very dissatisfied and snorted: “You are so boring!”

Lin Chaoxi was very embarrassed, and wanted to explain it, but he listened to the old king and said: “What you want is to feel the excitement of the moment. It’s too boring to vent your bottom!”

“It’s still too young.” Aguang shook his head and criticized her.

The two were very unhappy to open their own paper group.

b.

Still b.

Like being suddenly plunged into the bottom of my heart, Lin was thrilled.

But she still asked them very seriously: “Master, you don’t want aliens, why not choose a bigger one?”

Pharaoh took the ballpoint pen and slammed her head: “Small voice, know what is the wall?”

Lin Chaoxi hurriedly lowered his voice and asked the question again.

“Are you stupid, everyone will choose a question, we choose b, is it not another way, the probability of winning more?” Pharaoh’s voice is light and mosquito-like, like a thief.

Lin nodded.

“Muggles definitely choose a simple topic, but we are different, we need to challenge!” Ah Guang shouted excitedly.

Lin continued to nod.

“That’s so decided!” Pharaoh said happily.

——

There are dozens of machines in the computer classroom, and dozens of students are having a heated discussion. No matter how low the air conditioner is, it can’t hold the atmosphere here.

After the excitement and excitement at the beginning, Lin quickly settled down.

Although this pursuit of fugitives is very similar to the prediction of the old forest car accident, they are still different.

In accordance with the pre-established strategy, the three of them began to carefully read the topics and express their views. Commonly known as brainstorming.

Lao Wang started the old cadre mode to preside over the meeting: “Everyone talks about their own opinions. This question is still very difficult.”

Aguang opened the appendix’s document, which recorded a dense call record: “It’s quite insidious. In these alarms, there must be false alarms and real alarms, and they need to be distinguished.”

“How to distinguish?” asked the old king.

“Bayesian network. Lin said evening.

“Hey!” Pharaoh took a deep breath. “Apprentice, you are not old enough, your tone is not small!”

“We can assign a probability to each witness event. The greater the probability, the more likely it will happen.” Lin said, and took the draft paper. She first drew a simple map on it and put it on the grid.

“Divide the map into grids of the same size, with n and e indicating their latitude and longitude, t being time, and p(n, e, t) being the probability that the fugitive will appear at a certain position at a certain moment.”

Lao Wang and A Guang are thinking and thinking.

Pharaoh: “And then in chronological order, constantly updated?”

Lin nodded.

“I think so.” Aguang said, “First give each square a different prior probability, and use the sighting event likelihood to update the posterior probability p(i,j) of each small square.”

“Yes, in fact, according to the witness report, combined with traffic conditions, road bridge structure, historical data, constantly give each square a new value.”

“Like this and this one.” Lin Chaoxi pointed his two reports in the report. “One shows the fugitive in the east of the city, and the other shows in the west, but if the previous moment report also shows the suspect in the east, then The report of Chengxi is obviously less credible.”

“It is precisely because of this, in the t+1 time, the assignment of sightings near the road in the west of the city is higher.” Pharaoh continued.

“Ok.”

“So use a Bayesian network?” Lao Wang said, “repeated Bayesian theorem multiple times. With more and more evidence, constantly update the posterior probability to compensate for the bias caused by the subjective judgment assignment?”

“Yeah.” Lin said, “That is, we can consider all the positions that the fugitive may appear at each time intercept point, and get a probability distribution map. The values ​​on this map are constantly updated. of……”

“It’s your head!” Wang Wang Zhen, “You are too curious about this idea? Let me knock your brain open!”

“I am smarter?” Lin rushed to avoid.

Aguang has already made a lot of drafts on paper and suddenly looked up: “Mom, can’t refute, you are really smart.”

He says.

——

Lin dynasty is actually very embarrassing. This is the idea that she spent a lot of time getting into the car accident. Pharaoh and Aguang seem to be a little bit, and the next discussion becomes the home of Lao Wang and A Guang.

In general, the team participating in the modeling competition must have a division of labor. One person is responsible for modeling; one person is the master of the thesis, while the last one is responsible for programming the data generation check.

According to their prior plan, Lao Wang is responsible for modeling, Aguang is responsible for programming, and she does more basic text work, constructs a thesis framework, and writes papers.

but……

“Why do you think Python is better? Matlab is still the first tool for scientific computing. It is best used in mathematical modeling, and there are many toolboxes. There are countless mature modules that can be called.” Aguang said.

“But there are many third-party modules in Python. The numpy module can make Python directly handle large matrices like matlab. The scipy module encapsulates a large number of algorithms. The matplotlib module allows Python to draw a large number of function graphs. In short, python can replace Most of the functions in matlab, and some advantages that matlab can not replace.”

“Python is very good, but I didn’t study it in depth. I used matlab to do it.” Ah Guang thought about it and continued. “I haven’t verified what you said. It’s really easy to use. It’s still doubtful.”

Lin Zhaoxi: “Please believe me.”

“But since I am responsible for programming, shouldn’t you believe me?” Aguang said.

Lin Chaoxi did not know how to refute, thought about it, she asked: “If I insist on it?”

“Then you are responsible for programming.”

A light heart straightforward, directly said so, Lin Xixi but stunned.

According to the prior arrangement, all the preparations she made were related to the writing of the thesis, and the programming problems were handed over to Aguang with confidence. Now Ah Guang’s “that you come” is equal to overturning all the preparations before her.

But standing in the position of Aguang, if he is responsible for programming, they should believe his judgment, he is actually right.

The problem is that she only knows more in this field than they do, and she believes in her own judgment.

After some heated discussions, the classroom was quiet. Many groups, like them, experienced a lot of inevitable disputes after experiencing the initial excitement and starting to solve problems.

Small-scale quarrels broke out in various groups, some were topical and some were ideas. Of course, there are also groups that, like them, start a new debate because of changes in the division of labor.

After talking to each other with some negative words, the atmosphere of the entire classroom was cold.

Time passed by and it was already at noon.

At this time, the solution was strolling again. He glanced at the situation in each group in the computer room and seemed to know everything about it.

He walked slowly to the podium and clap his hands and smiled. “Interrupt, you are not hungry, do you want to eat some instant noodles?”

There were no sounds around, no one spoke.

“That goes to the cafeteria to have some food.” The solution is full of food and drink, “1 canteen chicken legs are good.”

Still no one responded.

“Go out and go.” A clear, calm voice rang from the last corner of the classroom.

I have been sitting in the classroom for the last time, I don’t know when I got up, and there was a little commotion in the computer room except the computer.

“We are still discussing.”

“Time is so tight, don’t eat.”

“Schoolmaster…”

Unlike the attitude of dispelling good words and persuasion, it seems unexpectedly strong. He didn’t talk, just standing there, it was necessary to consider his advice.

Lin Chaoxi took a deep breath and understood the purpose of the sly. She took the lead to stand up and patted the shoulders of Pharaoh and said to Aguang: “Let’s go, let’s go eat.”

The old king sighed: “Apprentice, women are so fickle like you?”

Lin Zhaoxi: “I am a woman now?”

“Sorry, sorry, I forgot.” Pharaoh immediately apologized.

Lin Chaoxi took the lead and the pure man went out of the dull machine room.

When I came to the open area, I was blown by the spring breeze, and the pressure suddenly dissipated a lot.

When I went down the stairs at the first level, I felt that I was really hungry. She stepped on the last step, holding the railing and her legs soft.

Lao Wang and A Guang walked in front and looked back at her.

“What happened to you?” A Guang asked.

Lin Chaoxi squatted on his stomach: “Hungry.”

“So suddenly, your woman is really fickle!” A Guangdao.

Lin Zhaoxi looked at the boy not far away, in the sun, he looked innocent.

In fact, there is nothing to entangle, the choice placed in front of her is very simple, programming this thing, either Aguang or she does.

She said to Aguang: “I am familiar with python, I can write programs, if you are at ease.”

Ah Guang is also very simple: “That line, you can also teach me, we study together, matlab may not be complementary to Python.”

“On the … paper, who will do it?” Pharaoh was shocked.

“I have to check the information anyway. Let me do it together with Lin Chaoxi. Let’s write a summary and framework together.”

“When are you so united?”

Lin Chaoxi did not answer the question of Pharaoh, but said to Aguang: “When I write the program, I can write it first, and then check it again. If you write the paper, you should write the skeleton first. I am fixing some details in the school, what is the font format? of.”

“can.”

“Then I only use the mathematical model responsible for solving the problem?” Suddenly, Pharaoh wanted to understand something, his expression was tangled, and he snorted: “I… How do you feel like being lying?”

Lin smiled: “No, no, we all rely on Teacher Wang.”