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 pile 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."

"ah?"

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."

"Creak——"

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.

To put it simply, as China's economic development level continues to improve, the power shortage problem across the country has become more and more serious.

Relying on thermal power plants alone to fill these gaps is very costly and environmentally unfriendly. Therefore, the country has planned a series of large and medium-sized water conservancy projects including the Three Gorges Project.

However, hydropower generation is limited by the capacity, water level and dry season of the reservoir, and cannot provide stable power supply throughout the year like thermal power. Therefore, corresponding thermal power is needed for peak shaving.

Xu Yang's research is precisely to optimize the load distribution of hydropower stations and thermal power stations in various time periods within a given period of time, so as to minimize resource consumption.

On this basis, it is also necessary to reasonably adjust the reactive power equipment to meet the thermal stability of the line, the transient stability of the transmission power and the safety constraints of the node voltage, so as to reduce the active network loss of the power system, improve the voltage quality and stability Enhance.

That is to say, both high efficiency and high security must be ensured.

The above two indicators are usually contradictory to each other, so this problem has actually troubled the power department for a long time.

The project completed by Xu Yang will undoubtedly be of great help to the future power transmission system across the country.

It can be said that it is a perfect realization of Chang Haonan's idea at the beginning of his rebirth.

You should propose a basic methodology or research direction yourself, and other researchers will conduct specific and application-level research on this basis.

As for the names on the list of people who completed the project, he didn't particularly care.

"It would be great if everyone could be as powerful as her..."

Chang Haonan thought a little unrestrainedly, and at the same time focused on the other letter printed in English.

This time, the content inside is in a very formal paper format.

A New Method for the Nonlinear Transformation of Means and Covariances in Filters and Estimators

A new approach to nonlinear transformations of means and covariances in filters and estimators.

Then he noticed that in the author column below the title, there was an identical mark in the upper right corner of the names of Chang Haonan and Xu Yang.

# These authors made equal contributions to the work of this article.

"Ah this..."

Chang Haonan scratched his head when he saw this line of fine print.

This means... I suddenly have an extra paper coming out?

With the help of an English-Chinese dictionary, Chang Haonan read the entire article in about three hours.

After all, a lot of it is his own content, so the reading efficiency is much faster than last time.

This paper continues the discussion between the two previous people, and the content is naturally about a new Kalman filter algorithm and the post-processing of its results.

And on the basis of theoretical derivation, many experimental verification parts have been added.

There was another piece of paper attached to the back of the paper. In addition to asking for Chang Haonan's opinion on the content as usual, Xu Yang focused on asking his opinion on the direction of submission of this paper.

"Submit your article..."

Chang Haonan put down the pencil in his hand, picked up the cup and took a sip of tea.

As a PhD graduate from Berkeley, Xu Yang's thesis writing skills are much better than Chang Haonan's.

If the latter wants to write an article in a foreign language, he must first write it in Chinese and then translate it. The article in front of him is obviously written in English from the beginning. Even an English layman like Chang Haonan can see its coherence. and professionalism.

So this time he made almost no changes to the paper. He just named the filtering method as Cubature Kalman Filter.

It’s not that I haven’t thought about pretending to be big and naming it directly with the last names of two people, but after all, this algorithm does not break away from the scope of Mr. Kalman’s thinking, and it is not easy to directly remove people’s names.

Anyway, there will be opportunities in the future.

As for the content of the paper...

On the basis of numerical approximation and recursive state estimation of Gaussian integral using the spherical-radial integration criterion, of course many extensions can be made.

For example, the accuracy can be further improved by using the spherical simplex criterion to process the spherical integral and the moment matching method to process the radial integral.

Or introduce covariance constraints and cost functions to expand the application scenarios of Kalman filtering to strongly nonlinear systems and non-Gaussian process noise systems, etc.

But these all belong to the application level or expansion level.

The paper itself is already very groundbreaking. If too much redundancy is added later, it will be superfluous.

The length of the article is not inherently better, not to mention that this article has a very detailed derivation process and is already twenty pages long including references, which is not short in the field of control theory principles.

As for the rest of the content…

Always give other people, or your future self, a chance to write a water thesis.

The key is where to publish it.

Unlike the previous article that studied the integrated layout of the inlet and cone precursor, the current paper is close to pure theoretical research, and there is no confidentiality.

More importantly, its application scope is very broad, not just in the aviation field.

Domestic cybernetics theoretical research has just started, and there are no decent journals at all.

No matter how good the content is, no one will read it if it is posted on a junk platform. In the end, it will delay the application of new theories.

Therefore, if you want to be seen by as many people as possible, you still have to consider submitting to journals under IEEE or IFAC.

Thinking of this, Chang Haonan knocked his head in distress.

In this era of underdeveloped information, there is no way to open a browser and enter Du Niang or Google Niang, enter "What journals are there in the field of control science" and get the results directly.

In fact, the entire Shengjing City has just entered the Internet.

The reason why Xu Yang wrote to ask about this matter is because her field is computer science and she doesn't know much about the control field.

As far as Chang Haonan's own memory is concerned, he only knows two top journals, IEEE Transactions on Automatic Control and Automatica.

Especially the former, in the moment before Chang Haonan was reborn, if he could publish an article on it, he would directly become a prominent figure in the field of control.

Before graduating with his Ph.D., he mustered up the courage to try to submit a manuscript, but unsurprisingly, he failed. The only response was a fixed-format automatic reply email.

"Then I'll choose you..."

Chang Haonan took out a pile of letter paper from the drawer, picked up a pen and started writing a reply.

In addition to the usual polite greetings, I just want to briefly talk about the situation of this journal.

As a top journal in the industry, it naturally has its own characteristics. For example, the submission process is more complicated than that of its peers.

Fortunately, Beijing has generally been connected to the Internet, so Xu Yang does not have to submit articles through transnational letters.

In fact, if possible, Chang Haonan also hopes to have a sufficient series of domestic journals that can bear the weight of this paper.

Various standards and evaluation systems formulated by Western academic circles are themselves part of technological hegemony.

Of course, this kind of thing is not something he can accomplish just by thinking about it.

With the current level of scientific research in China, even domestic journals are not read by anyone. Many people even translate foreign papers and publish them directly in them.

In the original timeline, it was probably after 2010 that a journal with certain international influence appeared in China.

The so-called third-rate companies make products, second-rate companies make brands, and first-rate companies make standards.

The same is true for scientific research.

Chang Haonan made some calculations. With the current efficiency, he dare not say that at a larger level, in some subdivisions, it will take three to four years to catch up with or even surpass the international advanced level, and to understand the "product" clearly. It shouldn't be big.

At this point, you can consider relying on the Chinese Academy of Sciences or Beijing Hang University to create a journal with international influence.

Everything is difficult at the beginning. As long as you can achieve a qualitative breakthrough from 0 to 1, the subsequent quantitative superposition will not be a problem.

As for longer-term things, such as establishing an evaluation standard to replace SCI, that will probably have to wait until China's overall scientific and technological strength leads the world.

But that day will come.