Top Student

Speaking of which, Xu You's ability to think of such an idea has a lot to do with Lou Song.

When Lou Song was solving the bug of the Xueba Community app, he thought of converting the APK code into a mathematical model.

It was at that time that Xu You learned this method from Lou Song, and only then did he come up with the current thinking.

Many things cannot be learned in textbooks, but can only be learned when in contact with experts.

After transforming the satellite positioning problem into a regression problem, Xu You's idea is to compile a convolutional neural network to directly regress all candidate areas.

In this way, the probability of the corresponding category can be predicted, the problem of overlapping candidate areas can be solved, and the detection of targets can be realized in real time.

Greatly improve the detection efficiency of satellites to ground targets, and improve the detection accuracy.

In the following time, Xu You started the work on this plan.

This scheme seems to be just an algorithm optimization, but it has a great relationship with the design and engineering of satellites.

Xu You needs a more accurate and in-depth understanding of every detail of the previous generation of high-scoring satellites in order to better complete the algorithm optimization work.

During this period, Xu You communicated with designers and engineers of many satellites, optimizing every detail bit by bit.

Work was still in progress until New Year's Eve.

"Mr. Xu, we will go to the cafeteria to eat dumplings in a while."

"Okay, Teacher Yu."

After working for many days in a row, Xu You's concept of time is already very vague.

Without even noticing, it was already New Year's Eve.

Fortunately, through these days of work, the optimization of the algorithm is basically completed.

Because this time, the satellite itself has not changed much, saving most of the time for satellite development and testing.

If all goes well, the satellite can enter the preparation stage for launch after the next year.

In the cafeteria, steaming dumplings have been cooked.

Wu Jing also came to the cafeteria and saw Xu You with a smile on her face.

Xu You still remembered that the reason why Wu Jing asked her to come here was that she wanted to celebrate the New Year with Wu Jing this year.

But since coming here, Xu You can't even see Wu Jing every day.

It can be seen that Wu Jing's tasks are very heavy, and Wu Jing needs to deal with many tasks.

As for Wu Jing's specific responsibilities, Xu You is not very clear now.

Xu You only knew that although everyone here referred to Wu Jing as "Teacher Wu", Wu Jing's status was not even lower than that of the leaders of the Aerospace Academy.

"Come and eat at my table."

At this time, Wu Jing did not deliberately avoid suspicion, but called Xu You over directly.

Xu You nodded and came to Wu Jing's side.

Since coming here, this was the first time that Xu You and Wu Jing ate at the same table.

Before, Wu Jing didn't have much contact with Xu You because of her busy work schedule.

In addition, the special relationship between the two parties is also one of the reasons.

If there is no need for work, Wu Jing can't often call Xu You to her side.

However, on the night of New Year's Eve, Wu Jing didn't want to deliberately avoid suspicion anymore.

"How is it, is it delicious?" Wu Jing asked with a smile.

"Delicious! Could it be that you made it?"

"How is it possible? When I was at home, Professor Xu always cooked. The dumplings were made by the staff of the cafeteria, and a few colleagues who were not so busy in the Fifth Hospital participated. Everyone stayed here for the New Year. At this time , here is the same as home.”

Wu Jing deliberately added the word "old" in front of "Professor Xu" to distinguish Xu Zhou from Xu You.

After all, there are already two Professor Xu in the Xu family.

Feeling the atmosphere in the cafeteria, Xu You really felt like celebrating the New Year at home.

They seem to have become accustomed to not being able to go home during the Chinese New Year.

We are not just colleagues, but also family members.

"How about it, are you homesick now?" Wu Jing asked.

This is the first time that Xu You is not at home for the New Year since he was born.

"I kind of think about it... But, with you here, I don't think about it that much anymore..."

Maybe it's because Xu You usually has too few opportunities to stay with Wu Jing, and Xu You cherishes the opportunity to be with Wu Jing more than when he was with Xu Zhou.

At this time, this year's Spring Festival Gala is being played on the TV in the cafeteria.

Xu You is not interested in the content of the gala, but as the BGM of the New Year's Eve dinner, the Spring Festival gala is still an indispensable part.

With the bells ringing on New Year's Eve, the Lunar New Year has arrived.

At this moment, there are still many staff members who are still struggling in their jobs.

For them, this special day is no different from usual.

...

After the Lunar New Year, the work of Xu You and others continued.

After continuous running-in and improvement, Xu You further optimized his own algorithm and completed the editing work of the final version of the algorithm.

Wu Jing organized the last meeting. If all goes well, the new generation of high-resolution satellites will enter the preparation stage for launch.

At the meeting, Xu You gave a speech about his optimized algorithm.

"In the latest version, after optimizing the convolutional layer, the calculation amount of the algorithm can be further reduced and the detection efficiency can be improved. At the same time, to solve the problem of large differences in the size of satellite imagery objects and objects, the use of multi-scale feature map fusion technology, Maximize the detection accuracy of the target."

Xu You has passed precise simulations to ensure that after the final optimization, Gaofen Satellite can achieve higher ground resolution.

"Mr. Xu, according to your calculations, in this new plan, what kind of resolution can the satellite achieve?"

"Probably between 30mm and 50mm. With a resolution of 50mm, the object will be clearer."

In fact, it is like the keyhole satellite in the United States, although in terms of specifications, it claims to be able to achieve a ground resolution of 100mm.

But in actual use, the effect is not so good.

With a resolution of 100mm, the image displayed on the screen of the ground target detected by the keyhole satellite is just a point.

If you want to really distinguish the size, shape and characteristics of the target.

It is also necessary to adjust the resolution to be larger. In theory, it needs to be 5 to 6 times the ground resolution.

After Xu You completed the optimization of the algorithm, the resolution of 50mm is not just a publicized data.

It is really possible to accurately detect ground targets at this resolution and restore them into a clear image.

Although it is not enough, it is exaggerated enough to see the license plate number clearly.

But I can basically tell how many people are in the picture.