They walked to the city center and saw two high-rise buildings, one with eight floors and four households on each floor, and the other with four floors and eight households on each floor.
Zhan Guyue walked to the north and south sides of the building to take a look.
"What are you looking at?" someone else asked.
"Look for numbers on the windows. None. Not like the houses to the north."
"Let's go in and take a look."
"Let's go in and find Mr. Tang. He lives on the 8th floor." Dong Chu walked downstairs and said to the administrator.
"There is no Mr. Tang here," the administrator said. "No entry without invitation."
Zhan Guyue saw the electric energy meter next to the corridor. "Here are the numbers. Does this do anything?"
Zhan Ding is here.
"You live here?"
Zhan Ding said: "Yes, come up and have a seat."
After Zhan Guyue, Dong Chu, and Liu Mozhi went up, they walked up the stairs and passed several houses, but they didn't see anything strange.
After entering the room, Dong Chu asked, "Did you also pick up the other people invited by Mr. Jiang?"
Zhan Ding said: "I picked up some of them and arranged them to stay. In fact, you can also stay in a hotel. The accommodation I arranged here is more comfortable."
Dong Chu asked: "Can you contact Mr. Jiang?"
Zhan Ding said: "I can't do it now. I can't even get through on the phone."
Liu Mozhi asked: "Can you contact Mr. Tang?"
Zhan Ding said: "I can't get through the phone either. It turns out that Mr. Tang lives in this town. But it's been a long time. I don't know where he is specifically."
Dong Chu said: "From a mathematical point of view, this building is like a matrix."
For matrix addition and subtraction, the latitudes between matrices must be the same, and the returned result will also be a matrix with the same latitudes.
Matrix multiplication must satisfy that the number of columns of matrix B is equal to the number of rows of matrix A. The calculation between matrices can be split into the calculation of matrix and multiple vectors and then the results are combined. The returned result is a column number equal to B. A matrix with a number of rows equal to the A matrix.
Dong Chu said: "Two high-rise buildings, one with eight floors and four households on each floor, and the other with four floors and eight households on each floor. It's like matrix multiplication."
Given a linear transformation, the matrix composed of its coefficients is determined. There is a one-to-one correspondence between matrices and linear transformations. You can use matrices to study linear transformations, and you can also use linear transformations to explain the meaning of matrices. The matrix produced by exchanging the rows and columns of matrix A is called the transposed matrix of A.
Zhan Guyue said: "What you said makes sense. From the building to the matrix, I was thinking about geometric figures at first."
"So what's the final numerical output? I think it's the determinant."
"Or a trace."
The determinant is arranged by
A number determined by a number in the form of an ordered square matrix, its value is
!Sum of items. The sum of the diagonal elements of matrix A is called the trace of matrix A.
They chatted upstairs for a while and were ready to go downstairs to continue walking.
At this time Zhan Guyue said: "Let's find out if there are cameras in these places. In several places, I noticed there are cameras."
There is one next to the house next to the lake. There is one next to the barn house. The mountain peak was far away and was not found. There is one in the middle of the woods and river. There is one next to the group of houses. There is one in a high-rise building. There are two in the corner of the store.
The cameras are all of the same type, and I don’t know whether they are automatically controlled or manually controlled. Don't know if it has image recognition function.
Zhan Guyue said: "There are basically cameras in these places."
Liu Mozhi said: "Perhaps surveillance equipment is installed next to the house? It may be normal."
Zhan Guyue said: "Well, we are worrying too much. People in this town are just doing their own thing."
Liu Mozhi said: "Do you want to climb the mountain? Go to the mountain opposite to see them herding sheep."
Zhan Guyue said: "I travel this far every day to herd sheep. And I put the sheep on different mountain peaks."
Because there is a fast river blocking the way, many people are unwilling to go there. They walked all the way through the woods. Drift through the shallower part of the river. Climbing the mountain peak may not be successful, so it’s time to travel and exercise.
Getting closer to the mountain. The flock is also close at hand.
Liu Mozhi just wanted to say hello to the person in front of her, but when she walked in and took a look, she shouted, "It turns out to be a robot!" She was so scared that she covered her mouth. It's just that this robot has the same height and shape as a human, and wears human coarse clothes. Not visible from a distance.
Dong Chu said: "No wonder he is basically motionless."
Zhan Guyue said: "Don't touch them now, let's look at other places."
It turns out that tomorrow they will drive the car and put the sheep in different locations, and then guard them here, with their eyes acting as cameras, filming the process of the sheep walking.
After waiting for a long time, Liu Mozhi said, "Aren't you leaving?"
"We'll wait and see where these robots go," Zhan Guyue said.
After waiting another two hours, they followed the robot's car. Wandering around to a farm. Finally entered the garage. The back of the car opened, and the sheep came down and entered the sheepfold.
The robot moved to another location, and they followed it and saw that the robot was charging next to the charging pile. They looked at the charging station and saw a series of numbers on it. It also showed that it was done by Shuzhen Microelectronics Company.
