Reborn Technology Scholar

Chapter 172 The project was rejected

On the day when Jingtian officially graduated, a major event affecting everyone was officially announced. The threshold for personal income tax was officially raised from 2,000 yuan to 5,000 yuan, which means that many people whose income is less than 5,000 yuan will no longer need to

Pay a tax.

At present, the salary of most workers in China does not reach 5,000 yuan, which means that many people no longer need to pay personal income tax, which reduces the burden on low-income people and increases the income of low-income people in disguise. This has a significant impact on narrowing the gap between the rich and the poor.

positive meaning.

Moreover, this year the two-child policy was officially implemented, and it is no longer illegal to have a second child.

"Academician Qin, your merits are immeasurable!"

"My whole family is grateful to you and has set up a longevity plaque for you!"

"Woooooo~~~My mother is pregnant, and I will have a brother or sister who is 18 years younger than me (crying loudly)"

"No need to be frightened anymore, I will have a son soon! (Crying loudly)"

"I used to have only one daughter, and I always felt that I had no motivation to work! Now I am so motivated that I can work overtime for a year!"

Various comments are very lively on Qin Yuanqing's WeChat and Weibo. Although having a second child is a good thing, there is also something that is not very good.

That is a big age difference, or even the phenomenon of children and grandchildren being the same age. These are social problems. Of course, generally speaking, the advantages outweigh the disadvantages.

The university has also officially ushered in the summer vacation. Compared with last year, the overall results of this year's college entrance examination have improved a lot. An astonishing more than 100,000 people nationwide scored full marks on the mathematics paper, which has caused a lot of controversy on the Internet. After all, last year

In the college entrance examination, not many people got perfect marks on the mathematics paper, but now it is common to get perfect marks.

So much so that last year’s college entrance examination candidates complained that this year’s candidates were really lucky, and the mathematics section was really boring, because just after the college entrance examination mathematics ended, someone uploaded the exact same questions, and then every question could be found in the "Qin Family Collection"

I found exactly the same questions, so many people criticized the math team for not being good enough and not thinking carefully about the questions before just copying them.

Qin Yuanqing was speechless after reading this year's college entrance examination papers, because he found that in the college entrance examination question group, all subjects suffered unreasonable disasters, and many of the questions were in the "Qin Family Collection". In the previous life, when Qin Yuanqing was a sophomore in college,

I thought about taking the college entrance examination again, so I reviewed my high school knowledge for a period of time. Although I did not take the college entrance examination later, I paid close attention to this college entrance examination. I have read the college entrance examination papers. When he was compiling "Qin's Collection"

, will be analyzed as a case question.

Unexpectedly, the historical inertia is so strong that so many identical questions would appear.

It can only be said that the college entrance examination topic group really did not pay attention to its work, and did not read the "Qin Family Collection" carefully, so it is now being criticized overwhelmingly, which is also self-inflicted.

For Qin Yuanqing, this brought great benefits, that is, after the college entrance examination came out, Xinhua Bookstore's "Qin Family Collection" was sold out and all the inventory was wiped out.

Qin Yuanqing felt that a sudden idea in his mind that year had turned into a treasure trove for him. There is no doubt that from the current point of view, he will once again be included in this year's rich list of writers.

Unlike FAW, "Qin's Treasure Book" Xinhua News Agency has always settled monthly, and the monthly settlement amounts are also different. It is undoubtedly the highest during the beginning of school, and it starts to be lower later.

Shuimu University has started to have summer vacation, but Qin Yuanqing does not have a summer vacation. For scientific researchers, there is actually no summer vacation. During the summer vacation for students, scientific researchers basically continue their scientific research projects. For professors, many people are invited

Going to companies to give lectures can also be considered as an income.

For university teachers, it is actually not difficult if they really want to engage in external business. They can hold training courses, give lectures, appear on TV or even start a company, and they will all make a steady profit.

Qin Yuanqing gave a project report on the study of aero engines. Yes, Qin Yuanqing started working on aero engines.

An aircraft engine is a highly complex and precise thermal machinery that provides the aircraft with increased power for flight. As the heart of the aircraft, it is known as the 'Flower of Industry' and directly affects the performance, reliability and economy of the aircraft.

, is an important manifestation of a country’s technological, industrial and national defense strength.

Currently, there are only a few countries in the world that can independently develop high-performance aero engines, such as the United States, Russia, Great Britain, and France, and the technical threshold is very high.

Although China has its own independently developed J-10 fighter jet and the J-20 fighter jet that has already been tested, it does not have its own aviation engine.

Once there is a fight, it will be very dangerous and it is easy to get stuck.

However, Qin Yuanqing filed a report, but was called back. The superior politely said that there is already a dedicated team working on research and development, and then said a lot of things. Qin Yuanqing just smiled lightly, not because he was not in this field, and the superior did not

Do you trust?

At present, China's two most famous aero-engine scientific research projects are the 'Kunlun engine' and the 'Taihang engine'.

The 'Kunlun Engine' project was initiated as early as 1984 and is positioned as a medium-thrust military turbojet engine. After hundreds of rigorous ground assessment tests and aerial assessment flight tests, the engine was officially approved for design and finalization in July 2002.

.The success of its development has made our country the fifth country in the world that can independently develop aircraft engines after the United States, Russia, Britain and France.

The development unit of the 'Kunlun Engine' is China Aerospace Fengtian Engine Design Institute. The development cycle lasted for 18 years, and then the test flight lasted for 8 years. It has not been put into use until now. Its successful development marks the evolution of my country's aviation engine from just one Being able to survey, map, imitate, improve and modify has entered a new stage of self-development, ending our country's long history of being unable to develop aero-engines on our own, and also marking the beginning of a new page of independent development in our country's aero-engine design.

The thrust-to-weight ratio of the 'Kunlun Engine' is 7:1, the maximum outer diameter is 882 mm, the total length is 4635 mm, the gas generator overhaul interval is not less than 6,000 hours, the power turbine overhaul interval is 20,000 hours, and the total power turbine life is 100,000 hours

, the total life of the gas generator is 40,000 hours.

But it is undeniable that the ‘Kunlun Engine’ project was established in 1984 and was aimed at second- and a half-generation fighter jets. Once it became successful, it actually fell behind and is now being used on J-7 and J-8 aircraft.

The symbolic significance of the 'Kunlun engine' is greater than its practical significance. Its appearance only means that our country can independently develop aero engines, but it still cannot change that our country's aero engines lag behind the world's advanced level.

The 'Taihang Engine' has been making big news and inspiring people in recent years. The 'Taihang Engine' was pre-researched in 1978, and the project was approved in 1987. The design review and assessment was completed at the end of 2005, which lasted 27 years. It was developed by the 606 Institute of China Aviation Research Institute

It is a third-generation domestically produced large-scale military aviation turbofan engine. Taihang is known as the "backbone of the world". China's first high-thrust turbofan engine is named Taihang, and its significance is self-evident.

Although the latest ws-10 'Taihang' engine is equipped with the domestically produced J-11b heavy fighter and has successfully completed the finalization review, marking our country's leap from the second generation engine to the third generation engine, there is one problem that cannot be ignored, and that is'

The Taihang engine still has a lot of shortcomings. Even after it is finalized, the quality of the engine is still unstable, and it is still in the troubleshooting stage.

If we give an evaluation to the current "Taihang Engine", it is that the "Taihang Engine" is barely usable and not enough to compare with international advanced aviation engines.

Although his project report was rejected, Qin Yuanqing was not depressed. After all, he could do it himself without R&D funding from his superiors. He was not like other scientists who were helpless without R&D funding.

Qin Yuanqing immersed himself in the library every day, looking at books on the corresponding fields of aero-engines to enrich his knowledge reserve.

In every field, there are actually big gaps.

For example, automobile engines and aerospace engines are both engines, but their technical content is so different that they are completely incomparable.

As he learned more and more, Qin Yuanqing began to understand why aeroengines are so difficult, because it involves two major aspects, one is basic materials, and the other is design.

Basic materials, this is simply China's weak point, because the country did not have enough money in the past and did not invest enough in basic research. The research on basic materials often involves detailed theoretical demonstrations of possible element ratios and manufacturing processes, and then consuming materials

Conducting research, constant trial and error, and finally approaching the reasonable range step by step, the entire basic material research and development is very expensive, and the money consumed is very scary.

Especially for aero engines, turbine blades, combustion chambers, etc., great emphasis is placed on basic materials, and sometimes a slight difference can lead to a huge difference. And once a mistake is made, the loss will be very large.

Therefore, in China, except for the national team that is now engaged in basic research, no private enterprise dares to enter, because once it enters, it cannot get out, and bankruptcy is foreseeable.

No matter how awesome a private enterprise is, let them try out basic scientific research! Those who point their fingers at the country and scold the country while making money with national dividends have no conscience.

Any breakthrough in advanced technology requires the country to pay a heavy price, forming a sunk cost, and then the enterprise earns dividends from its operations.

As for the second major aspect of design, it is also a big problem. China's start is still too late. These areas require krypton gold. There is no krypton gold in the early stage, so now it is equivalent to making up for homework, which is not so easy to make up for.

, even the teacher’s foundation is not solid, it’s strange that the students he teaches can have a solid foundation.

Therefore, in the past, when imitating products, we often knew what was happening but did not know why or how it worked. Therefore, although the imitation products were exactly the same, there were actually large deviations in performance, and we did not know where the problem occurred.