After Qin Ke's thesis defense, there was a five-minute intermission, and then it was Ning Qingyun's turn to defend her doctoral thesis.

With her hair tied into a single ponytail, a girl who was extremely beautiful and exuded a cool aura stood on the stage. With a melodious voice, she began a thesis report titled "Application of N-S Equation in Soil Penetration Fluid Mechanics".

Compared with Qin Ke, who looks more mature, Ning Qingyun still maintains the figure and appearance of an eighteen-year-old girl, making her look like a girl who is still in high school or has just entered college, but she is still so young.

The girl was standing in front of more than a hundred authoritative experts in the physics world, giving a very professional and profound thesis defense report.

This had to make the old professors present deeply sigh once again: "The waves behind the Yangtze River push the waves ahead, and the new generation is better than the old ones."

The key words of Ning Qingyun's report are fluid mechanics, N-S equation and permeability mechanics.

There is a strong correlation between liquid penetration mechanics and soil mechanics. Ning Qingyun once came into contact with and understood it in Duan Yonggong's "J-92 Breakwater" large-scale experiment.

But this time Ning Qingyun’s research direction is not earthworks, but agronomy-related precision drip irrigation technology for desertified soil.

This is a very niche field, and it is also very unpopular. It is so unpopular that not one of the more than 100 senior professors present is engaged in research in this area.

However, everything remains true to its original purpose, and Ning Qingyun’s report was very detailed and everyone could basically understand it. It mainly used fluid mechanics and N-S equations to deduce and design precise drip irrigation technology.

Ning Qingyun's theoretical level of fluid mechanics, understanding of the N-S equation, superb mathematical computing ability, and in-depth understanding of sandy soil and seepage mechanics demonstrated in the paper, as well as the meticulous and reasonable simulation experimental plan constructed, all impressed Ning Qingyun.

Everyone was amazed.

As expected of a Fields Medal winner, in terms of mathematics, just like Qin Ke’s report, basically not many people could understand it all.

The same is true when it comes to the mechanics of sandy soil and liquid penetration, and few people can ask in-depth questions in this regard.

Fluid mechanics is relatively better. There are at least a dozen academicians. The professor can understand everything, and the rest of the people can probably understand more than half.

This made the Q&A session more lively than Qin Ke's time. The academician judges and professors finally found some sense of presence and asked Ning Qingjun various questions, such as the basis for the original experimental plan, the mechanics of penetration and

relationship between fluid mechanics.

One of the judges, Xu Boyuan, a professor of physics at Yanda University and an academician of the Academy of Sciences, said curiously: "Ning Qingyun, you have designed a more reasonable experimental plan in your paper, verified the theory and mechanical model you proposed, and demonstrated the drip irrigation technology.

The water-saving effect can exceed 72%, so is your technology a laboratory technology, or does it have the conditions to be promoted and industrialized?"

"Hello, Academician Xu." Ning Qingyun replied politely: "Basically, the conditions are met for industrial promotion, but just like Qin Ke's previous paper, precise drip irrigation technology needs to be targeted at different desertified soils and plants.

Only by using the mechanical model I designed for optimization can we achieve the water-saving efficiency mentioned in the paper. Otherwise, on average, the water-saving efficiency will only be about 50%."

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[I really just want to be a god of learning]

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"50% is already very good." Academician Xu Boyuan praised sincerely and reminded kindly: "Student Ning, although your technology is not as widely used as Qin Ke's technology, it still has great potential. If you haven't applied yet,

Patents, please remember to apply in time.”

"Thank you, Academician Xu. I have indeed applied for a patent for this technology, but it should not be commercially licensed."

Academician Xu Boyuan asked unexpectedly: "Why?"

Ning Qingyun just smiled and did not answer this question that had nothing to do with the paper.

This technology patent only applies to barren sandy soil and is not suitable for normal soil, so the commercial value is not high. Ning Qingjun plans to donate it to the country together with the patented technology of the perfect desert sweet potato.

In a girl's mind, there is no need to talk about these things and show them off everywhere.

The question and answer session continued, and professors asked questions one after another, and Ning Qingyun answered them easily.

Finally, Academician Wen Xuanping asked a question that everyone is concerned about but has little professional and technical content:

"Ning Qingyun, I'm curious, why did you choose this subdivision as the topic of your doctoral thesis? Although your doctoral thesis is very exciting and your professional level is unquestionable, this direction is indeed too partial.

It’s like a direction that young people like to research.”

"Wenxuanshi, you mean that the direction of this topic is more 'lower-level' than 'yangchunbaixue', right?"

Academician Wen Xuanping smiled and nodded.

Ning Qingyun thought carefully before replying: "Theoretical physics does have many cutting-edge and new directions, such as quantum computing, superconducting materials, etc., and fluid mechanics also includes aerodynamics, which studies aircraft and even spacecrafts and space stations.

Design and other high-end topics. My doctoral thesis chose the direction of precision drip irrigation of soil. The reason is actually not complicated. Firstly, time is limited. I only have one month to prepare the whole thesis. I naturally chose the field that I am more familiar with.

one direction."

"Secondly, I believe that no matter how 'soil' is an issue, it has its role and practical significance. Soil is related to the national economy and people's livelihood, and food is the lifeblood of the country. In many deserted areas that are short of water, water is a precious resource. Precision drip irrigation technology

It can significantly improve the planting efficiency of local crops, increase farmers' income and improve their lives."

At first, when they heard the first reason, everyone was a little amused. This girl was really honest. But when they heard the second reason, everyone was moved.

Who among those who engage in physics does not want to engage in high-end atmospheric research? Needless to mention the "two bombs and one satellite" that were enough to make the older generation of physicists talk about their lives in the past, quantum communications, new energy, and high-tech in the past 20 to 30 years

Materials, chip technology, aerospace, interstellar navigation, deep-sea exploration... which research direction is not both prestigious and profitable if you mention it?

Moreover, these directions are also in line with the country's science and technology development strategy, and it is much easier to apply for funds and obtain honors. Therefore, most of the experts and professors present focused on these directions. No one has really considered basic agriculture related to the national economy and people's livelihood.

A young and beautiful girl like Ning Qingyun took this into consideration. Not only did she choose this direction as the topic of her doctoral defense, but through careful research, she actually proposed a feasible precision drip irrigation technology solution to help solve the problem of water shortage areas.

The benefits of crop planting help farmers achieve a well-off life.

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This is the ambition and sentiment that scientists should have!

No wonder last month, "Renren Daily" unabashedly praised Qin Ke and Ning Qingyun for "demonstrating what it means to be a scientific researcher with responsibility, courage and spirit"!

Seeing Ning Qingyun's serious and calm expression on the stage, the school leaders, academicians, experts and professors present all had mixed emotions, some were ashamed, some were moved, and some were even more appreciative.

Academician Wen Xuanping said with emotion: "Classmate Ning Qingyun, I heard that you and Qin Ke have studied the hybrid breeding of new seeds before, so you are more familiar with the direction of agriculture?"

Ning Qingyun hesitated for a moment and looked at Qin Ke.

Qin Ke nodded slightly, indicating that he could speak.

Ning Qingyun continued: "Indeed, this topic is actually directly related to a desert plant breeding project that Qin Ke and I are working on, and it is highly complementary."

Desert plant breeding topic?

Everyone was surprised, and at the same time they understood why Ning Qingyun would study drip irrigation technology in desertified soil.

Although Academician Wen Xuanping was also curious about what plant breeding topic it was, it had nothing to do with this defense. Seeing that Ning Qingyun had no intention of elaborating, he stopped asking. After asking the judges for their opinions, he said:

"Then let's score together."

Each of the judges raised their scoreboards one after another.

Not surprisingly, Ning Qingyun also passed the defense of her doctoral thesis with full marks.

The next step is the regular process. Their graduation certificates, doctorate certificates, and doctoral uniforms are already prepared. They change clothes, award certificates, take photos with the leaders of Qingmu University, and teacher Jiang Weixian, and then take photos with the judges.

The eight academicians took photos with guests and accepted congratulations...

The final student careers of Qin Ke and Ning Qingyun came to an end under the recording of countless flashlights and high-definition cameras.

The Physics PhDs of the two were also officially announced.

When the two of them changed back to their original clothes and returned to the lecture theater, it was still full of people, and almost no one left early.

As soon as Qin Ke walked in, they immediately realized that they were being targeted.

Academician Wen Xuanping rushed up and said with a smile: "Xiao Qin, Xiao Ning, you have officially graduated. You haven't decided where to work yet? Why don't you come to our Xia Ke Academy? The Institute of Physics is short of two

He is a full professor with graduate students. I even brought the letter of appointment." After saying that, he handed over the letter of appointment.

Many experts and professors present were secretly envious. The vice-president of the Academy of Sciences personally invited and presented a letter of appointment. Such treatment is so rare!

But Principal Huang of Qingmu University was not happy and came to stop him: "Dean Wen, you are wrong. Professor Qin and Professor Ning are graduates of our school. Our school has already offered the best conditions to invite them."

The two of them stayed to teach..."

Principal Zhao from Yan University next door squeezed over and interrupted: "Old Huang, your attitude towards food protection is wrong. How can you force Professor Qin and Ning Qingjun to stay at Qingmu University? What if they have a more preferred workplace?

?”

Principal Zhao showed the most cordial smile to Qin Ke and Ning Qingyun, and boasted: "When it comes to the level of physics teaching and research, our School of Physics at Yanda has always been much better than Qingmu University. Not only does it have the first-class teaching conditions and scientific research in the country,

Conditions, and top-notch students! We can also build a fluid mechanics laboratory specifically for Professor Qin and Professor Ning..."

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Principal Huang from Qingmu snorted coldly: "By the time you finish it, the day lilies will be cold. Our school has a ready-made national fluid mechanics laboratory..."

Principal Zhao responded tit for tat: "Oh, your school's fluid mechanics laboratory already has Academician Jiang Lao, but we can build a new experimental building according to the wishes of Professor Qin and Professor Ning! In terms of treatment, our side is better

It is guaranteed to satisfy the two professors. A house of more than 200 square meters within the third ring road can be transferred directly, and a driver will be assigned to take you to and from the school every day. If the two professors want to live on campus, our Yanda University can also provide a permanent free single-family villa on campus.

…”

"Professor Qin, Professor Ning, why don't you two consider coming to our Chenghai Jiaotong University?" President Wei of Chenghai Jiaotong University cut off President Zhao's words without politeness:

"I won't mention the material conditions. They are only better than those at Yan'an University! I guarantee that you will not have to worry about trivial matters such as food, clothing, housing and transportation for the rest of your life! In terms of teaching, we are not as stingy as the Institute of Physics and Yan'an University. They only give master's degree qualifications. We
To be continued...