my scientific age

Chapter 244 The Eve of the Lugou Bridge Incident!
"Hello, Yu, please come in." Feng Kamen smiled kindly and invited Yu Hua to enter.

"Thank you." Yu Hua nodded and thanked him. He entered the Chinese-style hut and saw US Colonel George in uniform. He was stunned for a moment, and then smiled.

Yu Hua did not expect that the U.S. military would also send someone here. Of course, this was definitely not for him.

The U.S. Air Force during this period has not yet been born, and the U.S. military aviation force has always been under the jurisdiction of the Army, referred to as the U.S. Army Air Force.

Colonel George nodded lightly and politely returned to Yu Hua with a serious face and no words.

Yu Hua didn't care about the other party's indifferent attitude. After all, in the eyes of these Americans, China has always been a symbol of backwardness. If he wants to be recognized by foreigners, the country must become strong.

"Please sit down, Yu, we only have 15 minutes, how much do you know about aerodynamics?" Von Karman motioned Yu Hua to sit down, smiling, and asked after a reminder.

"Very few, I only know that the plane can fly because of lift, and the parameter that determines the flight speed is resistance." Yu Hua sat down, shook his head, and answered truthfully.

Yu Hua is very unfamiliar with the comprehensive discipline of aerodynamics. If he has to understand it, it is the various aerodynamic layouts that are familiar to later generations.

Tracing the underlying principles and theoretical basis of the aerodynamic layout of modern fighter jets is not something a military fan should do.

"It is very valuable to know that these are very valuable. Since your mathematical calculation ability is very good, can you solve this problem?" Feng Kamen showed a kind expression, nodded in praise, and then took out a prepared draft paper and handed it to Yu Hua .

Yu Hua took the draft paper and carefully reviewed the topic. The content was an air motion problem based on Euler's differential equation of motion.

This question is extremely difficult for ordinary students, but for Yu Hua...

It's not as difficult as when discrete logarithms were used in the first place.

The whole person took out the pen that he carried with him, without stopping, he directly wrote the calculation result required for the question on the scratch paper: "Professor Carmen, take a look at this data, is this data correct?"

Feng Kamen looked at Yu Hua's rather frivolous behavior, frowning slightly, almost instantly, his good impression of Yu Hua dropped a lot: "Yu, don't you need to take a look again?"

Just look at it and write the calculation result directly?
There is no such thing as the Arabian Nights. Feng Kamen, as the questioner, understands the difficulty and nature of the question he prepared.

This question is very computationally intensive, and even with extremely smart money, it will take at least 10 minutes to solve it.

"No need, Professor Carmen." Yu Hua shook his head.

"Okay..." Although Feng Karmen was very disgusted by this kind of behavior, he still resisted the anger in his heart and took the scratch paper with his hand.

When his eyes looked at the calculation results, Feng Kamen was obviously taken aback, and he looked at it again, and the whole person had an incredible expression, as if he had seen a ghost.

Unbelievable!

It's incredible!

At this moment, all the anger seems to be like the snow and ice on the eaves in winter, when it meets the bright and bright sunshine, it melts and dissipates.

"The calculation result is correct, Yu, how did you do it?" The situation he encountered was extremely impactful. Feng Kamen felt a little itchy in his throat. He coughed twice to ease the atmosphere that had just permeated, and asked Yu Hua.

Yu Hua smiled: "I have a very good talent in mathematics, and these are all calculated by me."

"Mental calculation of complex fluid motion?!" Feng Kamen was stunned again. Yu Hua's answer left him at a loss. Ordinary people don't know this concept, but he is very clear.

The calculation of fluid motion is very cumbersome and complicated. Generally speaking, just calculating one parameter often takes several tens of minutes or even several hours, and consumes tens or hundreds of sheets of draft paper.

That's it, you have to pass the math level!
Without sufficient mathematical level, it is impossible to complete such astronomical mathematical calculations.

However, Yu Hua only took a few breaths to complete the calculation through mental arithmetic...

Von Kamen said that he had never seen such an outrageous mathematical calculation ability in his life.

"Yes, this is my talent." Yu Hua nodded and smiled.

Feng Kamen took a deep breath, his impression of Yu Hua changed again, from an ordinary student to the level of a genius, no, Yu Hua's current performance has been called a super genius.

However, this evaluation still needs to be verified.

Next, with a scientific research mentality, Feng Kamen gave a series of questions with moderate difficulty but a large amount of calculation. Yu Hua knew that this was from Feng Kamen's test. He used the highest computing power of the thinking computer to calculate the number of questions per second. These data are analytically calculated at a speed of [-] million operations, and accurate parameters are given.

15 minute later.

"Yu, you are a super genius." Feng Kamen got the last data and ended the encounter that was entirely centered on mathematics. Looking at Yu Hua, his mind had a new understanding of the limit of human mathematical computing ability, and his heart was full of Amazed, no wonder Zhao Zhongyao asked Yu Hua, a student, to be his assistant.

This kind of terrifying mathematical calculation ability that challenges the human imagination is the dream of almost every scientist.

At this moment, even Feng Kamen wanted to recruit Yu Hua as his assistant, responsible for processing extremely large experimental data.

"Thank you for your compliment, Professor Carmen, I think my performance should make you feel the 'smartness of the Chinese people'." Yu Hua smiled and spoke modestly, his eyes fixed on Feng Kamen in front of him, revealing a touch of anticipation.

"I can feel it, your intelligence and math skills amaze me."

Feng Kamen sighed, looking at the expectation in Yu Hua's eyes, with a kind smile on his face, took out a personal business card from his pocket, and then used a pen to leave an exclusive personal signature, and then handed it to Yu Hua: "Yu, the time is up, this is My business card, I think you know what it means."

"I hope you can come to California, come to me, and at Caltech you can get all the knowledge you need, and I'm sure we will work together very well."

In the words, there is also expectation.

Now, Feng Kamen has begun to look forward to the picture of Yu Hua coming to Caltech. Yu Hua's mathematical computing ability is the most urgent need for aerodynamics research.

"Thank you, Professor Carmen, this is the best thing I've received this year." Yu Hua stood up with a look of respect, bent down and took the individually marked business card with both hands, and carefully put it away.

"Looking forward to our next meeting, Yu." Seeing Yu Hua, who paid so much attention to business cards, Feng Kamen was even more satisfied, nodded and smiled.

Yu Hua nodded, straightened his back, and bowed to Feng Kamen, expressing the courtesy of the Chinese to his husband: "Students don't bother you."

The words fell, and with respect, he left the house.

It is very rare for von Karman to allow him 15 minutes of meeting time. Now that he has got von Karman's personal business card, which is like a letter of recommendation, Yu Hua is already satisfied.

"Professor Carmen, is this Chinese student very good? Why do you call him a super genius?" After Yu Hua left, Colonel George, who had never spoken during the conversation between the two, asked.

Although he didn't say a word, he understood what the personal business card given by Von Kamen meant, which was the dream of countless high-level American students.

Whether college students, masters, or doctors, they are all equal in front of Feng Karmen's personal business card.

No one can turn down Von Karmen's business card.

Von Kamen smiled and made a simple analogy: "His ability in mathematics, you can't match him in a thousand combined. When he arrives in the United States one day, you will understand Yu's ability."

"Okay...Professor Carmen, according to the schedule, you will go to the Peking Hotel for a dinner tomorrow, and leave for Nanchang on June [-]. General Zhou Zhirou, commander of the Chinese Air Force, will be waiting for you there to inspect the large-scale wind tunnel project in Nanchang. Colonel George shrugged when he heard the words. He had no idea about mathematics, and he didn't care how strong Yu Hua's mathematical ability was.

No matter how strong mathematical ability is, it is impossible to make this country strong.

Feng Kamen heard the words, nodded lightly, motioned Colonel George to deal with the scratch paper on the coffee table, then got up and walked to the bedroom, ready to rest.

……

Time passed quietly, and day by day, the popularity of Feng Kamen's visit to Tsinghua Garden gradually declined, and the school returned to its usual quiet and peaceful state. Yu Hua, who obtained Feng Kamen's business card, was not complacent, so he gave up and still worked hard.

Whether it is Feng Kamen's business card or Zhao Zhongyao's recommendation letter, if you want to use these two things, you must get a Geng-funded public student quota in the United States.

Moreover, even if you are admitted to the United States as a public-funded student under the Geng-funded scholarship, there is no place to be complacent.

There are many people who are better than me in history.

A week later, at the end of June, Yu Hua finally finished the 60-word epic-level masterpiece-Introduction to Military and Field Guidance before the Marco Polo Bridge Incident broke out. important science and technology.

After getting the introduction of military and local guidance, Yu Hua did not rush to send it to Lin Wan through Zhang San's identity, but prepared to wait for the German mechanical processing equipment to arrive at Tianjin Wei, and then hand it over to the organization with the help of Lin Wan.

After writing this book, Yu Hua can finally concentrate on his studies, improve his level of nuclear physics and mechanical engineering, supplement relevant knowledge in the field of metallurgy, and continuously improve his knowledge reserve.

With the continuous improvement of the level of mechanical engineering, Yu Hua has gradually touched the theoretical threshold of oxygen blowing furnace technology and began to carry out preliminary research work.

Among the many core technologies of the oxygen blowing furnace, the oxygen lance ranks first. The structure and design of the oxygen lance are extremely important. Secondly, the air separation equipment technology and compressor technology for oxygen supply must be solved.

Oxygen lance, air separation plant, compressor, the technical content of the three is by no means comparable to that of Qiming Deng and Yu's Seven Towers. If you want to come up with these cutting-edge technologies for the steel industry, there is no shortcut.

Scientific research is by no means rhetorical. Today we talk about oxygen blowing furnaces, tomorrow we will complete the design, and the day after tomorrow we will open the furnace for smelting.

Yu Hua conducts the preliminary technical research of the oxygen blowing furnace while learning knowledge, and his daily life tends to be fixed. Library-classroom-nuclear physics laboratory, the standard is three points and one line, and he has no idea of ​​going to female classmates to talk about love. .

On Prof. Zhao Zhongyao's side, since Yu Hua became an assistant, almost everything has been developing for the better. The nuclear physics experiments have progressed by leaps and bounds. The experimental data can be calculated and processed in a short time, and the efficiency is almost ten times higher than before.

This situation made Zhao Zhongyao smile almost from ear to ear, while conducting nuclear physics experiments, while teaching Yu Hua hands-on.

As for Professor Zhuang Qianding from the Department of Mechanical Engineering, to be honest, Yu Hua has never seen him except once in the auditorium that day.

As the time draws closer to the end of June, on the eve of the Lugou Bridge Incident, the city of Peiping is still stable, and all the students in Tsinghua University are about to have their final exams in 1937.

"Yu Hua, come here." In the classroom, Yu Hua had just left the get out of class when suddenly a voice came from behind.

"Professor Zhuang, who are you?" Yu Hua turned his head and looked closely. The person who came was Professor Zhuang Qianding. His eyes were reddish, his face was haggard, and his mental state was very poor. Yu Hua was stunned for a moment.

Come on, what's up with Professor Zhuang?

"Go to the office and say." Zhuang Qianding said to Yu Hua with joy in his eyes, then turned and went to the office.

Yu Hua nodded, followed in the footsteps, and came to the classroom office together.

"These are the three previous papers, which have been written. You should sign the name of the second author." Entering the office, Zhuang Qianding sat in his seat, took out the three papers that had been written and put a pen on it. On the desktop, he said to Yu Hua.

The words are full of relaxation and comfort.

Yu Hua immediately understood the situation, nodded, picked up the pen and signed his name at the end of the three papers: "Uh... well, Professor Zhuang, have you been writing papers all this time?"

"How is it possible, I was developing a vertical drilling machine during this time, and your previous words woke me up. If the Yankees don't sell it to us, it does not mean that we cannot be self-reliant. Do you want to go to the laboratory to see my latest vertical drilling machine? "Professor Zhuang shook his head, how could it take him so long to write the thesis, he glanced at Yu Hua and smiled.

For more than ten days, you have built a new type of vertical drilling machine...

Yu Hua was refreshed by Professor Zhuang's top-level R&D ability and hands-on ability, and expressed admiration. No wonder Professor Zhuang looked like he hadn't slept well for a long time.

(End of this chapter)