"What I'm building here is a non-equilibrium countable Markov chain, from which the Markov chain can form a directed graph ......"

Maldo's conversation with Du Xiaodi was straight to the point from the very beginning. Mardo was indeed very interested in the algorithm proposed by Du Xiaodi in his paper, and he had read through it many times before coming to China, and he had repeatedly deduced some of the calculation steps. At this time, he came to Du Xiaodi with his own questions, and it is conceivable how difficult it is to make an academic expert like Maldo wonder.

Du Xiaodi replied a few words, and found that he could not explain it in words. This is partly due to the fact that her English skills are still very limited, and partly because she is not able to explain this kind of mathematical derivation. After obtaining Yu Feng's consent, Du Xiaodi picked up a piece of chalk and began to write a formula for Maldo on the blackboard. At first, Mardo sat down and listened, but after a while he couldn't help it, got up and walked to the blackboard, picked up another piece of chalk, and began to write, arguing with Du Xiaodi as he wrote.

Du Xiaodi was a little nervous at first, for fear that he would mess up. After talking for a while, she gradually entered the state, and she forgot about her fears. Although this algorithm was taught to her by Feng Xiaochen, she has deduced it countless times herself, and modified it in combination with the results of computer calculations, so it can be said that she is familiar with it, how can Maldo's problem be difficult for her. Previously, she had spent several days and nights trying to find the analytical solution of this set of equations, although the work was not completed in the end, but she had studied all kinds of changes in the equations, and Mardo could write a random formula, and she could immediately derive it, without even a little stumbling in the middle.

The two of them said as they wrote, and after filling a blackboard, they took the blackboard eraser and continued to write. Maldo is the kind of person who forgets everything as soon as he enters the work state, where can he still remember that he was invited to be an examiner, and only regarded the conversation with Du Xiaodi as a peer exchange. Du Xiaodi had no choice but to follow Maldo's rhythm, and he couldn't care about the attitude of Yu Feng, Cai Xingquan and others.

The whole audience was dumbfounded, like Cai Xingquan and Yang Zhuoran, who knew how to do it, naturally knew what the old and young people on the podium were talking about, and others, including Yu Feng, because they were not welding majors, fainted after listening to a few words, and only looked at the formulas of one screen after another shaking in front of them, looking very profound.

Gao Lei sat below, the corners of his mouth slightly curled, and regarded everything on the podium as a play. He firmly believes that Maldo is the actor invited by Cai Xingquan, and what Maldo and Du Xiaodi wrote on the blackboard looks mysterious, but in fact, it was all arranged in advance, just to plug his Gao Lei's mouth.

How can there be such a coincidence, and where can there be such an old and disrespectful expert. If you ask a random question and can argue with a student for so long, is it because the student's level is too high, or is your level too low?

“Good，Very_good！”

After filling the blackboard a dozen times, a smile appeared on Maldo's face, and he slapped his face, expressing his appreciation for Du Xiaodi in an extremely exaggerated tone.

"Du, you are very good, your understanding of welding theory is extremely incommensurate with your age, I think, at least a scholar over 35 years old can have such attainments. Also, I think you're a math genius, and your ideas are amazing!"

Maldo said to Du Xiaodi from the bottom of his heart. Cai Xingquan had asked him to give Du Xiaodi a good review in advance, and he also agreed, preparing that if Du Xiaodi's performance was not too bad, he would say a few good words along the way, which could be regarded as giving Cai Xingquan a face. But now, all these words of praise he said came from the heart, because he felt that a young girl in her 20s could do this to this extent, which was really amazing.

Hearing Maldo's praise, Yang Zhuoran and Li Zhaohui also slapped lightly in agreement. They are knowledgeable, and they can see what kind of skills Du Xiaodi showed just now. It can be said that the questions raised by Maldo are several points more difficult than the most difficult questions prepared by the two of them in advance, but Du Xiaodi satisfactorily answered these questions, some of which are Du Xiaodi's own opinions, which make them feel refreshing for the old people who have been immersed in the welding field for many years.

"Professor Yang, Chief Engineer Li, you two should also ask some questions. ”

Seeing Maldo return to his place, Yu Feng said to Yang Zhuoran and Li Zhaohui.

Yang Zhuoran looked at Li Zhaohui, who smiled at him and shook his head, Yang Zhuoran also smiled, and said to Yu Feng: "Principal Yu, the later assessment is no longer necessary. Xiao Du's performance just now is enough to prove that she is an excellent welding student, and I can say that it is rare for a master's student to reach her level in China. ”

"I think she's at a level that is enough to go for a PhD. After listening to Li Zhaohui's translation for him, Maldo echoed loudly.

"Yes, I'm a layman when it comes to welding. Since all three experts said so...... Professor Gao, do you see any opinions?" Yu Feng turned his head to Gao Lei and asked.

Gao Lei smiled slightly and said: "Isn't this procedure a little wrong? Mr. Maldo was invited by Professor Cai, and from beginning to end, he was the only one who asked Du Xiaodi a question, and there seemed to be only one question, although they wrote a lot of formulas on the blackboard. Based on his words alone, he thinks that Xiao Du's level has reached the standard, isn't this a bit rash?"

Yang Zhuoran said: "Professor Gao, the question that Professor Maldo just discussed with Xiao Du is a very difficult question. Xiao Du gave a satisfactory answer in the process, and I think this is enough to prove her skills. To be honest, the questions that Chief Engineer Li and I prepared were not as difficult as the questions that Professor Maldo had just asked, and it was a waste of time to ask those basic questions. ”

Gao Lei said: "Both of you are welding experts hired by the Ministry of Machinery, and I believe in your level." But Professor Mardo, IMHO, who can prove that he knows welding?"

"What are you talking about? You said Professor Maldo doesn't know how to weld?" Yang Zhuoran looked at Gao Lei, his face stunned.

Gao Lei smiled and said, "I'm just asking a question." Maybe he is just an expert in other fields, and it is not appropriate for him to evaluate whether a graduate student majoring in welding is qualified, right?"

Maldo sensed that Gao Lei was talking about him from everyone's eyes, and he asked Du Xiaodi, who walked down from the podium and was standing in front of their group, "Miss Du, can you tell me what that gentleman was talking about just now?"

Du Xiaodi thought for a while and said in English: "Professor Maldo, this gentleman wants to know, do you know how to weld?"

"Really?" Maldo nodded, and then said to Gao Lei: "This gentleman, I can tell you that I am indeed just a newcomer when it comes to welding, and there are many questions that I don't understand. ”

Gao Lei also understands English, and when he heard Maldo's words, the expression on his face became even more proud, and he said: "Professor Yang, look at it, he himself admitted that he was just a beginner. ”

Yang Zhuoran showed a crying and laughing expression and said, "What's strange about this, I also think I'm just a beginner." In fact, researchers have this feeling, the more they are exposed, the less they feel they know, and this is what Professor Mardo meant. ”

"Are you convinced? How do you know he knows how to weld?" Gao Lei asked.

Li Zhaohui couldn't help it, turned his head to Gao Lei and said: "Professor Gao, you have a specialization in the art industry, you are engaged in economics, and you don't know much about our welding field. Professor Mardo is a well-known name in our field, in fact, Professor Cai has just introduced, saying that Professor Mardo is the executive committee member of II, you don't think that the executive committee of the International Welding Society does not understand welding, right?"

"International Welding Society ......" Gao Lei's face suddenly turned purple, Nima's Cai Xingquan, what do you say II, I thought it was a chess association, you said that this is the abbreviation of the International Welding Society, as for me to put such a big oolong? In the society, he can mix with the position of the executive committee, which is not a big bull in the industry, he personally came forward to endorse Du Xiaodi's level, even if he said it casually, no one is qualified to doubt. The more I talk at this time, the worse the slap in the face will be.

"I see, uh, I guess I'm misunderstood. Gao Lei said stupidly.

Yu Feng didn't want to let go of Gao Lei, he asked, "Professor Gao, are you satisfied with today's assessment results?"

"Very good, I think the format is still very good. Gao Lei said stubbornly.

"So, Du Xiaodi's level should be recognized, right?"

"I think since the experts have said that, it should be good. ”

"Do you think we still need to organize further assessments?"

"Well, maybe you don't need it......"

"Well, thank you so much Professor Gao. Otherwise, this is the end of today's assessment activity. Professor Cai, the school office has arranged a small banquet, please accompany Professor Mardo. By the way, call Xiao Du too, I see that she communicated very well with Professor Maldo just now. Yu Feng began to arrange it as if no one was around, and put Gao Lei aside.

Cen Jianwei walked up to Gao Lei and asked respectfully: "Professor Gao, do you have any other requirements for our investigation work? For example, do you have to do some more work from other aspects?" ”

"I think that's the end of it. Gao Lei replied with a dark face. Of course, he could come up with some other methods, but in the current situation, it is estimated that the result will not be different if he uses other methods, just a few more slaps in the face.

Cen Jianwei nodded with a smile and said, "Okay, we will complete the investigation report as soon as possible, and we will use a special section to thank Professor Gao for the guidance provided during our investigation." ”