The military-industrial scientific research system of the academic master.

Due to the tug-of-war just now, when Chang Haonan said goodbye to Yang Fenghao and left the canteen, he could already see a crescent moon hanging in the sky.

On the way back to the dormitory, he suddenly thought of Yao Mengna, who had been acting strangely this morning.

"By the way, what did she want to say last night..."

Just when Chang Haonan was hesitating whether to ask the other party specifically, another familiar voice came from the side.

"Regular worker!"

It's this familiar plot again, and even the person walking out of the security booth is still the young guy from last time.

"Chang Gong, your letter."

"Mine again?"

Chang Haonan took the envelope and took a look under the dim street light at the door.

It's still the same envelope as last time.

Although I couldn't see the words clearly, it was obviously sent by Xu Yang.

She probably has some new ideas about differential evolution or Kalman filtering algorithms.

"sorry to bother you."

Chang Haonan nodded to the security comrade to express his gratitude, and then went upstairs back to his residence.

When he took out the key to open the door, he heard the sound of the lock cylinder turning behind him.

Turning around subconsciously, it was Yao Mengna.

She was standing at the door now, holding an aluminum electric kettle in her hand.

Although it can be plugged in to boil water, the electricity bill is very expensive. Secondly, the power of this thing is as high as 1500-2000W, which is a huge electricity burden for this old dormitory building, and may cause the fuse to burn.

Therefore, when there is water in the boiling water room, most people will still turn on the water directly.

The unexpected stare lasted for about half a second, and finally ended with the latter's cheeks turning red and running away.

"Why does she feel like...she's avoiding me?"

Chang Haonan touched his nose in confusion.

However, he thinks he has an advantage, that is, he is quite self-aware in terms of emotional intelligence, so he never guesses other people's thoughts——

It's better not to guess if you're smart enough to guess wrong.

So just enter the house, close the door, and lock it in one go.

Then he took the letter and sat in front of the desk in the bedroom again.

Open the envelope.

As expected, there was another stack of letter paper, but it was divided into two parts.

One of the slightly thicker ones was even in full English.

And it's still printed.

Chang Haonan took a deep breath when he saw this scene.

"Looks like I need to make another cup of tea..."

He stood up again, picked up the water cup and tea leaves next to him, and thought rather helplessly:

"If you do this a few more times, I'm afraid a conditioned reflex will form."

Since moving into this dormitory, Chang Haonan has only taken out this bag of tea twice.

It's all because I want to read Xu Yang's letter.

……

When he came to the living room and saw the thermos bottle, he remembered that the half-filled bottle of water in it was from before he went to Fucheng, and it had already been cold.

I had no choice but to put the things in my hands aside, pick up the thermos and go out to get water.

There are only two boiling water rooms on each floor of the tube-shaped dormitory, located at the two corners of the U-shaped building.

Chang Haonan's dormitory is located in a U-shaped section.

Therefore, it was not unexpected to meet Yao Mengna again on the road who was returning from fetching water.

"that……"

After the two passed by, the latter's voice came from behind him:

"There is no water in the boiling water room. Let me share some with you."

The volume of a kettle is roughly equivalent to two thermos bottles and a little more.

"Oh...thank you, senior sister"

Chang Haonan said and put the thermos bottle on the ground directly, and then took the kettle from the other party's hand.

"By the way, senior sister, when I returned to the dormitory yesterday, you asked me if I was free. Is there something wrong?"

Yao Mengna trembled when she heard this question.

But looking at his quite natural movements and expressions, she finally relaxed a little.

"It seems that he really didn't think much about what happened yesterday..."

So Yao Mengna took a deep breath and answered almost as fast as flying:

"Oh, it's nothing. I wanted to ask you if you have time to go have dinner together."

"That's it... as long as it's not about work."

"what?"

Just when she was thinking about what this sentence meant, Chang Haonan had already picked up the filled thermos bottle again:

"I'm also worried that I'll miss something important by taking a break."

"Squeak-"

Yao Mengna heard a sound of gnashing of teeth, and it took a moment to realize that it was coming from her.

The fist is hard.

She suddenly regretted giving the half pot of water to the piece of wood in front of her.

……

A few minutes later, Chang Haonan sat back at the desk with a cup of strong tea.

Due to his rather special field of work, Chang Haonan had few opportunities for academic exchanges with foreign colleagues in his previous life.

So although his English is not very bad, he learned it by rote for the exam. He can understand literature and so on, but it just requires a lot of thinking.

Therefore, Chang Haonan almost instinctively put the English one aside and opened the other one first.

【When I arrived in Wang'an, I saw the words as if I had met each other. 】

[Inspired by the documentation you provided last time, I tried to apply the differential evolution algorithm to the cascade water, thermal power dispatch optimization during this period, and transformed the dual-objective optimization problem into a single-objective optimization through the cost penalty factor and trade-off factor. problem, and relied on trade-off factors to make preference trade-offs between the two goals, and achieved quite good results...]

[Because the power department is very urgent about the progress of the project, I have not been able to discuss this matter with you in advance, but I have written your name and specific contribution on the list of people who completed the project...]

The letter itself was very short, and it only took Chang Haonan about a minute to read it. Attached at the end was a completion report of the scientific research project.

"Using differential evolution algorithm to optimize water, thermal and power systems and dynamic environmental economic dispatch"

There is a big difference between a thesis report and a thesis. If I have to say it, it is somewhat similar to the abstract and summary of a paper. In short, it does not explain the content of the research in great detail.

But Chang Haonan, who already had a deep understanding of differential evolution algorithms, quickly saw the general technical route of this project.

Although the source of inspiration was the instruction document he wrote before, Xu Yang further introduced the Gaussian perturbation operation operator and the local search operation operator, which is actually half a new algorithm, not to mention that she also independently completed the cascade water and fire A series of other work such as mathematical model of power system dispatch optimization.

Although it is not possible to deduce the Riemann Hypothesis from 1+1=2, it is at least the level of understanding differential equations after learning calculus.

"It's really amazing..."

About ten minutes later, Chang Haonan put down the letter in his hand, leaned back in his chair and admired sincerely.