How do you predict the movement of a pedestrian? Or can the process be predicted?

The vast majority of people will answer "yes" at the first time. Because most people will go directly to their destination.

It's just a straight line!

But is it really that simple?

No.

Because there is always more than one pedestrian on the street.

Pedestrians will automatically avoid others, and every movement of each pedestrian will have a certain impact on others around them.

In addition, human beings will unconsciously tend to people who are in the same direction as themselves. This tendency is also very small, and the two people do not get too close to each other. However, this one is subtle.

In addition, it is not necessarily the time for each person to become aware of the approach of others and react to avoid it.

The speed at which pedestrians walk is not necessarily.

At every moment, the impact of each person's movement on the people around them is different, and the overall size and direction change at any time. There are too many uncertainties, too many uncertain factors. At the macro level, these effects will cancel each other out, forming a huge "crowd".

It's like Brownian motion.

Brownian motion, also known mathematically as the Wiener process, is a stochastic process. The independent incremental, normal entropy is such that the mathematical expectation of this process is always zero. It is an absolutely random and absolutely irreversible process.

But......

"Fortunately, it's not the Wiener process in general. Wang Qi stared at the repetition of the impact and thought, "Pedestrians always have a destination...... Pedestrians choose their path on the basis of either biological instinct or subjective favorable expectations. ”

At least not absolutely random.

At least not the math expectation is absolute zero.

Very good. As long as there is a glimmer of possibility.

On the orders of Wang Qi. Thousands of trap birds scattered. Focus on tracking down some of the people who recur before and after the murder demon commits the crime. There are also peculiarities that do not fully correspond to the general direction of the crowd.

This is a piece of Wang Qi's mind.

A part of his mind is standing on the path of Shenjing, which has been automated, observing, calculating.

For Jarvis, a city's pedestrian traffic cellular automata was too much of a burden. He did not hesitate to follow the Ten Thousand Immortals Illusion Realm and encroached on a part of the idle computing power of the Ten Thousand Immortals True Mirror.

To put it simply...... Black past.

Such an obvious act of death could not be concealed from Feng Luoyi. But Wang Qi also knows that although the Ten Thousand Immortals Fantasy Realm is awesome, there is a lot of idle computing power. But research institutes across the state are counting on this idle computing power, and countless research data are running on it. He really didn't know how long it would be to get in line.

Fortunately, he is now a small privileged class. On the day he appropriated the computing power of the Ten Thousand Immortal True Mirror, he received a message from Feng Luoyi. Feng Luoyi reprimanded him fiercely in his heart, and then Wang Qi used the idle computing power of the Ten Thousand Immortal True Mirror this time to charge twice the ordinary standard.

Twice, Wang Qi felt that this number was exchanged for time. No loss.

And the mind of his other thread is calculating the possible path of action of the killer in a position that cannot be seen by the surveillance.

There are no known conditions other than the fact that "the killer must have been here at a certain time period", as determined by the time of the crime.

Where will he meet his victims?

According to what rules will he move?

At what point will he leave the main road in the surveillance area and walk into an alley?

I don't know.

But one thing is for sure.

This guy usually commits crimes at night. Killing people on the road in the open. In addition, his motive for committing the crime is unclear. But since it's a random hunt, it will definitely take a little bit of time to identify the victims.

This time can't be too long, because he needs to be well hidden.

"All the irregular and idle guys in Shenjing are being watched by the Department of Justice. Another section of Wang Qi's mind was reading the results of the investigation of the Shenjing Criminal Law Department: "He may take some time to take a walk every day and commit crimes while walking." Or on the way to work, on the way home. ”

"He can't go out of his way to collect information about the ruffians. Hehe, if there is a person who always wants people to inquire about the ruffians, the people he has inquired about will definitely disappear...... This legend will certainly be more popular than the killer itself. ”

"He shouldn't be bullied all the time...... Nima has the strength to kill people but is bullied, this is not an extremely powerful earth with a state of violence, but a god, a world with strong personal force!"

"He has the potential to attract the ruffians...... Show off your money, pretend to be stupid and have a lot of money, or is it beautiful?"

"If you encounter it, you will kill it and vent your **. ”

"He has a limited amount of time to wander, and he doesn't have much speed. He would pass through the main roads and then attract these local punks in the alleys. ”

Since there is no chance of killing more than once, it can be speculated that after he kills, he will follow a certain path back to the main road and return to his peaceful life. ”

Combined with the analysis of the Shenjing Criminal Law Division, Wang Qi made such a judgment.

Study the ruffian's movements, and speculate on the circumstances under which the two individuals would meet at this particular location, and then find out how many intersections he might have passed.

Even if there are thirty cases, thirty different sets of results can be obtained. However, it is not helpful to compare 30 different groups of suspects and focus on the duplicates among them.

Because there are so many of them.

However, Wang Qi did not expect to find the final solution in this way. Moreover, this kind of thing, which has no evidence and is purely based on mathematical calculations, is also difficult to be believed.

But it doesn't matter.

"The time from the time this psychopathic murderer went out to the place of the crime was within a certain value. ”

"It can't be too long, but it's not too short either. And he would go out at this time every day. ”

"Otherwise, the guy who only had an abnormal record of going out on the day of the crime should have been found out by the Shenjing Criminal Law Department a long time ago. ”

"According to the law of pedestrian flow, calculate the route that this guy may pass. ”

"Plus the possibility that he is loitering in the non-monitored area......"

"Together, it's a road map of possibilities. ”

The convergence of this road map is where that guy must have passed.

Although there may be many of them. But......

"I feel like I'm getting close to you, bastard......" Wang Qi commanded the thread fingers of the flesh to tap lightly on the table, playing with a special memory in his hand.

This is Wang Qi's last idle thread. The remaining forty or so threads are voraciously reading relevant literature, papers, and academic monographs. I hope to be able to give myself a little inspiration.

"All that's left is a water mill," Wang Qi whispered to himself......, "I have to prepare a suitable piece of equipment." (To be continued......)