country made

"Study on Energy Utilization Efficiency of Electric Explosion Foil Initiation System" is a research done by Ji Yu in the past.

Not a particularly remarkable study, nor something that would shock the tech world.The main purpose is to study the energy utilization efficiency of weapon ignition and detonation devices, and to enhance their energy utilization and start-up speed.

Although it is used in weapons, the key is only the "ignition device", and the required things are not difficult to make.In addition to the battery aluminum foil modified by Ji Yu and Song Jining, dozens of capacitors of different sizes and powers were purchased, and several kinds of bidirectional trigger diodes, voltage regulator diodes, etc. were also purchased. , Inductor coils, photocouplers, magnet inductors, etc., I bought a lot of each component.

Although Ji Yu once did an experiment, it was a long time ago and the components were different, so it was impossible to succeed at one go, and he still needed to conduct many experiments.

The most important thing is that he didn't do these researches to show off his knowledge and just write a paper. He wanted to take the opportunity to teach Song Jining what he knew and learned, so even if he knew the right research direction, he planned to start from the wrong place , so that Song Jining can really think and understand.

Back then, Ji Chuan completed this research with the help of his teacher. Not to mention the information queried in the research, the key point is that the required research funds were provided by the teacher's laboratory, and now they have to pay for it themselves.

Looking at the pile of purchased spare parts and the string of prices behind the purchase list, Ji Yu couldn't help but want to sigh.Scientific research is too expensive. If they only rely on their own money for research, they will not be able to stick to a few items. However, with their current qualifications, it is as difficult as ever to apply for national scientific research funding.

Fortunately, his current research belongs to a small category, and the cost is not too high. When the research becomes large, he will have to find a way.

After buying the things, Ji Yu led Song Jining to start researching.The study of electric foil explosion requires a lot of physics knowledge, and the textbooks alone are not enough. Fortunately, they are in a university of engineering and technology. They may not have other books, but physics books are piled up on several bookshelves, and they are free to borrow.

Ji Yu doesn't have a photographic memory, he understands a lot of knowledge by himself, but he can't explain the principle, so he still has to rely on books.The library limits each person to borrow up to ten books at a time. For the convenience of reading, the two borrowed library cards from their classmates in addition to their own.Slowly, more and more books were carried back to the laboratory by the two of them, almost piling up into a hill in the corner, and more and more books were spent in the laboratory every day.

Song Jining, after Ji Yu's guidance, didn't know much about it from the beginning, and gradually he was able to help Ji Yu.In addition, Ji Yu also handed over the work of writing the thesis to him, and he only guided from the side, so that Song Jining could know more exactly what the experimental research was about.

The experiment has also made good progress. After all, it is a repeat. If Song Jining had to be taught, Ji Chen's speed could be doubled.He has now researched the peak value of the curve required for the pulse discharge of the capacitor. According to the time, the experiment should be completed by the end of the semester.

Then, the two hard-working students were interviewed by the head teacher.

From the perspective of normal freshman status, these two people are completely unqualified.

They didn't join any school clubs, didn't join any school organizations, and didn't even participate in any class sports activities. Especially Song Jining was still the class monitor, but he disappeared every day except for going to the library. All the class monitor's affairs were done by the deputy monitor.

Of course, the most important thing is that these two actually skipped a few classes!

Although the school spirit looks free, the school is very strict about learning. Students who have finally been admitted to university cherish class time more, and there has never been a case where a freshman dared to skip class.

Class teacher Lin Binliang had to interview these two students who seemed to have personality problems.

"Do you know why I called you?" It's really rare for college students to be called into the office for interviews these days. Ji Yu and Song Jining are absolutely unprecedented freshmen in the University of Science and Technology. In the office, apart from other teachers, all their classmates ran out of the window eavesdrop.

Ji Chen nodded and apologized embarrassedly: "Sorry, teacher, we skipped a few classes..."

Because several experiments were critical and could not give up halfway, the two had to skip those few classes, but they would borrow notes from their classmates to make up for them afterwards.Later, I found that these courses were very simple, and I could follow them even without tutoring, and the two of them skipped more classes...

However, no matter whether he can keep up with the class or not, as a student, he shouldn't be skipping class. A good student, Ji Lian, has a guilty conscience, and he sincerely apologizes when asked.

Song Jining actually didn’t think so. The courses in the first semester were too simple. Among the professional courses, only the two courses “Engineering Graphics” and “Basics of Design Expression” made him feel a little fresh. The other two courses “Introduction to Industrial Basics” and “Industrial Design Ideological Foundation", in his opinion, it is enough to just take the book home and read it.As for the other "Mao Gai" and "Ideological and Moral Cultivation", it is not as pure as he taught when he was a little red soldier!

Song Jining had no interest in other sub-courses such as "Legal Safety Education", "Situation and Policy Education", "Public Welfare Labor" and "College English".He came to study mechanical engineering, and he was not interested in any courses other than his major.

However, he also knew that as a student, he couldn't argue with the teacher, Ji Yu apologized, and he also bowed his head to apologize.

Lin Binliang didn't want to embarrass the two outstanding students too much. Apart from skipping a few classes, their daily performance was still good, so Lin Binliang only asked them to write a self-criticism and let it go.

But the experiment is getting more and more difficult. In the past, when Ji Zhen was experimenting, he was guided by a teacher and assisted by colleagues, but now he only has Song Jining as an assistant.Although Song Jining has studied hard and made rapid progress, Ji Chen's experiment is not a single experiment.He wants to make various electric explosion foils, and then conduct dozens or hundreds of different experiments according to various power, current and magnetic fields.

No matter how smart and hard-working Song Jining is, he is only the foundation of a student after all, and he can't keep up with Ji Chen's experimental progress.

Of course, Ji Yu is not in a hurry, he will slow down and teach Song Jining slowly at this time.

It's just that in this way, the two of them spent more time skipping classes.Even if they didn't skip class, when they came to the classroom, they were mostly studying physics—but they didn't have a physics class this semester!

Such behavior of ignoring the teacher was too arrogant, and the two were interviewed by Lin Binliang again.

This time the reprimand was much more severe. Even though the two apologized repeatedly, Lin Binliang also said that they would be severely punished.

It is necessary to write a self-criticism, but their situation is not serious enough to be punished. After thinking about it, Lin Binliang gave them an extra half month of "Public Welfare Labor" class.

The "Public Welfare Labor" class, in short, is the "Labor" class, which is dedicated to doing work.For example, cleaning toilets, cleaning warehouses, mopping the corridors of teaching buildings, etc. public labor, referred to as "public welfare labor" class.

Fortunately, there is only one class a week, and the whole class does not feel tired working together, and they can move freely after finishing ahead of schedule, which the students quite like.

But since it was a punishment, it was not easy for Song Jining and Ji Yu. Half a month of public welfare work was not allowed to take up their normal class time, so the two were arranged to participate in school labor after school in the afternoon.

There is not much labor work in the school. Although Lin Binliang wanted to punish them for cleaning the toilets, Lin Binliang worried that it would hurt the self-esteem of the students too much. After all, these college students are the favored children of the future, so a little punishment will do.Therefore, after thinking about it, Lin Binliang asked them to clean up the school's mechanical equipment.

This is a university of science and technology, and there are not many others, but science and engineering laboratories abound, and each laboratory has more complete electronic instruments and mechanical equipment than other colleges.

Of course, it is impossible for them to touch the instruments and equipment in the laboratory. Lin Binliang punished the two to clean up the equipment eliminated by the school.

"These things have been in the warehouse for a long time. Some are broken and some are still usable, but they have been kept there since new equipment came in." The teaching assistant who led them over introduced them as he walked, looking at the two with sympathy and sympathy. It's funny: "You can just scan it casually, it's useless anyway."

Ji Yu nodded: "Thank you teacher."

The teaching assistant opened the warehouse door and looked inside: "Hey, there seems to be a new device."

He walked in by himself and looked around the new equipment: "I haven't seen it before, which laboratory put it down?"

Ji Yu also came over to look at the device, his eyes flickering.

The teaching assistant looked at it for a while, then turned around to other places to make sure there was nothing abnormal, wiped a piece of equipment with his finger, looked at the thick dust and shook his head, and said sympathetically to Ji Yu and the other two: "This The room is where you have to clean, the rags and brooms are in the cabinet, I hung the key directly on the door, remember to lock it when you leave, just put the key back in my drawer."

Ji Yu didn't answer, but kept his eyes on the device.Song Jining looked at him suspiciously, and after replying to the teaching assistant, he closed the door, walked over and asked, "Yuanyuan, is there something wrong with this device?"

Ji Chen nodded and shook his head.

"It's a bit wrong. I didn't expect this device to exist now, and it can't be eliminated during this period..."

"Yuanyuan, what are you talking about?"

Ji Yu came back to his senses and smiled at Song Jining: "Brother Song, do you know what this device is called?" Before Song Jining could answer, he said excitedly: "If I guess correctly, it should be the first Generation Conjugate Disk Hot Indium Press Seal High Shear Homogenizer!"

Song Jining: "...together...because of...what reason?"

"Conjugate disc hot indium pressure sealing high shear homogenizer!" Such a tongue-in-cheek name, Ji Yu didn't pause a word when he said it.He looked very excited, like a child seeing a toy, he kept touching the machine, his eyes were full of joy to see the baby: "This machine is very, very advanced, it can thermally compress steel, strengthen The high energy density of steel can change the energy and quality of steel, and can perform micro-cutting, change the structure, improve the sealing accuracy, etc. We used to manufacture..."

Ji Yu was so excited that he almost wanted to say that he had used it in the manufacture of aircraft engines before, but fortunately he bit his tongue in time.

Song Jining didn't bother to ask how amazing this device is, he saw Ji Yu bit his tongue, he quickly opened his mouth, put his thumb in and caressed: "Why did you bite your tongue, no matter how happy you are...does it hurt? "

He touched the soft tip of Ji Rafter's tongue, but he didn't find any wound, but he saw that Ji Rafter's face was wrinkled, it was obviously painful from biting, so he withdrew his hand, lowered his head and kissed Ji Rafter's lips.Hooking Ji Yu's tongue and licking it again and again, Song Jining let go and asked, "Does it still hurt?"

Ji Yu covered his mouth and shook his head: "It doesn't hurt anymore... I, let's clean up quickly!"

During the recent period, Song Jining didn't treat him like this or that anymore, but fell in love with kissing abnormally, and almost wanted to kiss Ji Yu when he found a chance.That kind of cautious and cherished feelings came from the tip of the tongue, and it felt more embarrassing than doing those things directly, making Ji Yu couldn't help but blush every time.