psychochemist

Chapter 260 Extra Story: Mathematical Hero——Zhao Jin 3
A person who has no sense of responsibility cannot be a perfect mathematician.

The two policemen looked at this slightly fat young man in amazement. He muttered something, but it was a little weird in this situation.

Policeman A asked, "Did you give the old man the 'Fourteen Manhunting Laws' just now?"

Zhao Jin raised his head and replied, "Yes, what's wrong?"

Policeman B: "Comrade, are you a policeman too? How do you know our special method?"

Zhao Jin said casually: "Oh, I'm not a policeman. But this 'Fourteen People Chasing Method' is a classic people-hunting model based on statistical data and mathematical models. I am a teacher in the Department of Mathematics of XA Jiaotong University. I just happen to be engaged in mathematical research and artificial intelligence algorithms, so I know a thing or two about it.”

Policeman A nodded and praised: "Thank you very much, you bought us precious time. Xiaoxiu, you hurry up and adjust all the surveillance cameras at the station."

The policeman named Xiaoxiu readily agreed: "No problem, Qingsheng."

It turned out that one of the two police officers was named Xiaoxiu and the other Qingsheng, with catchy names.

"It's too late!" Zhao Jin stopped Xiaoxiu.

Qingsheng and Xiaoxiu looked at Zhao Jin in confusion, "What do you mean it's too late? Why are you in no hurry? Isn't it right to adjust the surveillance at the first time?"

Zhao Jin explained: "There is no problem with adjusting the monitoring. But this is a station. If the child is abducted, his transfer speed will be faster than normal, and it is too late to watch the monitoring. According to the speed simulation, if one hour passes, Our search radius should be [-] kilometers; the search radius should be [-] kilometers in two hours; after three hours, it should be [-] kilometers. Although the radius is an arithmetic progression, the difficulty of searching is doubled by the square!"

Qingsheng and Xiaoxiu glanced at each other. Although they didn't quite understand what he said, they felt that what he said seemed a little reasonable.

Qingsheng asked, "Then what should we do now?"

Zhao Jin squatted on the ground, picked up a stone and began to draw on the ground. While drawing, he said: "It has been about 43 minutes since the child disappeared. If the child did not enter the passenger station to get on the bus, he would have been arrested nearby." The fourteenth chasing method 'find it. I'm afraid that once he gets into the car, it will be even more difficult to find him."

The old man cried anxiously: "Then what should I do... what should I do?"

Xiaoxiu also said, "Yes, so what should we do? We can't mobilize so many police forces at once. The police force will be tight at the end of the year, and it will take time to mobilize so many police forces."

Zhao Jin said calmly while drawing circles on the ground: "Calm down. Aristotle once said that calmness is the magic weapon in a race against time. We assume the worst outcome, the child is abducted, and this station has There are 5 platforms, and each platform departs every 160 minutes, which means that [-] vehicles have already been dispatched!"

Qingsheng frowned: "160 cars? How can I find them?"

Zhao Jin: "They will all take the high speed, and immediately notify these cars to stop at the nearest service area for investigation."

Xiaoxiu picked up the walkie-talkie and asked the main station for support.

Zhao Jin: "I just calculated that there are about [-] expressway service areas with a radius of [-] kilometers. I don't know much about your process, but can you send police to these server areas to investigate?"

Qing Sheng: "We will call for help now like the chief dispatcher. But you also know that judging from the current situation, it is unrealistic to send so many police directly."

The old man fell to his knees again: "I beg you, comrades in the police, you must save my grandson!"

Zhao Jin fell into deep thought: "Indeed, based on the current situation, it is indeed difficult to mobilize so many police officers to find a child who may be suspected of being lost. It is the end of the year, and the tasks of the police officers are already very heavy. Inspire the teachers and move the crowd."

Zhao Jin glanced at the heartbroken old man again, feeling a sense of sympathy and responsibility in his heart.He lowered his head, carefully looked at the model diagram he drew, and thought to himself: "No! This is not the optimal solution, there must be an optimal solution!"

Zhao Jin began to list the probabilities in his mind: the 40 platforms are divided into east, west, north, and south, the probability of going south is about 20% (because the south passes through mountains, the route is complex and the fastest to leave the province), about [-]% go north, and go east ...probability of a single person committing a crime...probability of multiple committing a crime...probability of transfer in a service area...probability of transfer in which service area...

Zhao Jin listed more than 40 probabilities in one breath, and then multiplied the probabilities that may occur at the same time.In the end, 54 results were obtained.

Qingsheng and Xiaoxiu were still comforting the old man.Zhao Jin got up suddenly, gritted his teeth and said, "Gamble! Officer Qingsheng and Officer Xiaoxiu, please make sure that the police in the Gaoping service area check the buses as soon as possible!"

Qingsheng was puzzled: "Why?"

Zhao Jin: "Because it has the highest probability. According to my analysis, the traffickers should be two people. They should start south by car and hope to cross provinces as quickly as possible. If it is a huge disadvantage, the cars they are riding on will inevitably take the CS Expressway, and within [-] kilometers of this expressway, there is only one service area, which is the Gaoping service area. The vicinity of the Gaoping service area is full of mountains, and it is easier to hide. right here!"

Xiaoxiu asked, "Are you sure?"

Zhao Jin: "I'm not sure, but I believe in mathematics and probability. This possibility has the highest probability among more than 50 possibilities. Since the police force cannot be assembled in a short period of time, then we have to gamble once!"

It was the first time for Qingsheng to meet someone who reasoned like this, although he thought it was strange, but seeing Zhao Jin so resolute, he suddenly had incomparable confidence in his heart.Qingsheng picked up the walkie-talkie and said, "Please make sure that the police in the Gaoping service area investigate the missing children as soon as possible, thank you..."

Do your best, obey the destiny...

The four waited anxiously for 10 minutes.Sudden!Good news over the intercom!
"The child has been found! I have found it! A pair of dogs and men stunned the baby with sleeping pills, and even sprinkled lime to try to run away. Fortunately, our support arrived at the first time, otherwise this grandson would really slip away, it would be too dangerous."

Hearing the good news, the four people at the station jumped up excitedly!The hero finally breathed a sigh of relief and sat down on the ground.

Two hours later, the police drove the child back.

A policeman named Qinghao who came back said: "It's too dangerous. If there was not a young man in the car who happened to hold back the pair of human traffickers, the child would have died. What a blessing! I met a good man."

The old man hugged the child and cried: "Ma Yimin, Ma Yimin, grandpa thought he would never see you again, woo woo woo."

The little boy was still confused and asked: "Why do I feel like I had a long, long nightmare? Why are there so many police uncles here?"

Zhao Jin bent down, squinted his eyes and said: "Little ghost, just now the police uncle played a game with you called Dream of the Brave. You performed very well and helped the police uncle solve the case. You are a little hero and very brave!" Zhao Jin Afraid of leaving a psychological shadow on the child, he deliberately made up a lie about playing games.

The little boy cheered up and said excitedly: "Is it true? It's great, so cool, hahahaha." He hugged his grandfather happily.

Qingsheng and Xiaoxiu were very relieved, and said to Qinghao: "There are still many good people, and the common people are also crouching tigers, hidden dragons. If it weren't for this XA Jiaotong University math teacher, the children would..."

Huh?What about people?In the blink of an eye, Zhao Jin quietly left, doing good deeds without leaving a name, hiding his merit and fame deeply.

Qingsheng said to Qinghao: "These people are really low-key. By the way, you said there was someone on the bus who stopped the traffickers. Who is that?"

Qing Hao looked up at the sky, and said thoughtfully: "I don't know who he is, he didn't leave a name, I asked him repeatedly, and he only mentioned a nickname."

"What?" Xiaoxiu asked.

Qing Hao: "He said, he is a psychochemist!"

　Be it mathematics, chemistry or psychology.Only when it is used in the hands of people with righteous thoughts, is the real science——Zhao Jin

　　
　
(End of this chapter)