A "bomb" that is more shocking than the formula of health care products has burned the school leaders and professors engaged in this research. However, for the whole event, it seemed to be just a small episode, they didn't know how to end, and the interaction on and off the stage was extremely enthusiastic.

"Mr. Zhang, I am Chen Sijia, a graduate student of the Department of Physics at Z University, and I have read all five papers that you have co-published with Professor Guo and Professor Shen and published independently, and I have benefited a lot. As you know, research on the GMR effect (giant magnetoresistive effect) is relatively lagging behind in China, and even now there are no courses in spintronics. ”

The trouble is led and has nothing to do with the department.

A graduate student engaged in condensed matter physics grabbed the microphone and couldn't wait to say: "Mr. Zhang, I know that the GMR effect refers to the phenomenon that when the material composed of ferromagnetic materials and non-magnetic metal layers is alternately combined, the resistance suddenly drops dramatically in a sufficiently strong magnetic field. I would like to ask, what is the relationship between the GMR effect and the hysteresis circuit of ferromagnetic materials? Does a hysteresis loop that shifts the center of symmetry cause a giant magnetoresistance effect? ”

The professional question charter was very happy to answer, walked to the stage and said with a smile: "To be exact, there is no direct connection between the giant magnetoresistance effect and the hysteresis loop of the material, but it cannot be said that there is no relationship." Because the hysteresis loop can reflect the exchange bias field, which is a very important condition in the GMR resistance effect.

I don't know a little bit about the second question, I think what you said about 'hysteresis circuit offset' should refer to the offset of the hysteresis loop in the exchange bias system, this is just to make the spin valve appear parallel and reversed, easy to observe. There is no direct correlation with the GMR effect.

As for the mechanism. I can't say a word or two here. You can leave the contact information with my assistant, and when I return to the lab, I will send you a copy of the textbook co-edited by Professor Kwok, Professor Shen and several physics professors from HKU, I hope it will be helpful to you. ”

He and two other Chinese scientists discovered the giant magnetoresistance effect in Hong Kong, and the following year in Germany, he predicted the existence of the CPP-GMR magnetoresistance effect when conduction currents pass perpendicular to magnetic multilayer films, which was experimentally confirmed in the same year, and became the internationally recognized physical basis for the development of CPP-GMR high-density magnetic readout heads and spin-related devices.

During an exchange at St. Petersburg University, he discovered the giant magnetoresistance of particle films. The four papers published independently in the journal Nature have an astonishingly high "impact factor". It is said that the number of citations has reached more than 10,000.

The layman looks at the bustle, and the insider looks at the doorway. Anyone who studies physics, especially condensed matter physics, knows what a remarkable achievement.

Chen Sijia was overjoyed to get the promise of the idol to send the book in person, hurriedly bowed deeply, hurriedly handed over the topic to another classmate, and immediately squeezed aside to find his assistant.

"Mr. Zhang, as far as I know, in addition to being a researcher at the NB Laboratory, you also have the status of the tenth richest person in Hong Kong. Academically accomplished. It's also very successful in business, can you share with us the secret of success? ”

This is undoubtedly the most curious question for students. As soon as the question was spoken, there was a round of applause in the auditorium.

"Thank you, thank you."

The charter smiled and said meaningfully: "This classmate, before answering your question, I must correct a point of view. It's not a good idea to be commercially successful, because NB Electric is a manufacturing company, a manufacturing company rather than a businessman, and if I had a position at NB Electric, I would prefer to be called an entrepreneur rather than a businessman.

As for success, I think everyone has a standard or definition of success, and it can be said that success is relative, but I am very happy to share with you the growth process of me, NB Electric and NB Laboratory......"

The charter talks eloquently, from dropping out of school at the age of 15 to sell cigarettes, to the special zone and brother-in-law meeting to jointly establish NB Electric, and then to meeting like-minded colleagues such as Guo Junru, Shen Xinru, Huang Li'an, Sun Xiaoguang, Lin Huixian, Wei Huaming, Xie Jingwen and Jiang Meimei, and told everyone a story of "sticking to dreams and changing the future".

“…… The spirit of cooperation is very important, without the spirit of cooperation, there would be no NB Electric and NB Lab today. However, I found that the precision of cooperation among domestic researchers is relatively weak, and there are many literati who are indifferent to each other and difficult to cooperate, which is very incommensurate with the trend of scientific research becoming more and more a collective creation. ”

The inspirational story is very attractive, but he hopes to change something through this speech and exchange, he looked around at the crowd, and said step by step: "Before Mr. Ding won the Nobel Prize in 1976, there were not many researchers involved in the experiment to find evidence for the quark, but now to find the evidence of the existence of the top quark, there are more than two experimental groups, a total of more than 800 people, to work together to do this big 'paper'."

The same is true for NB Labs, for example, the medical imaging diagnostic technology research and development project of our Faculty of Technology Application, with a total of 24 sub-project teams and nearly 400 people working together. If you include the projects entrusted to systems engineering laboratories and experimental centers, the total number of projects can be in the thousands.

In short, the world of the future is turning into a 'research village'. However, the phenomenon of seniority in China's scientific and technological circles, who are only willing to be the 'head of the chicken' and unwilling to be the 'tail of the wind', is obviously extremely incompatible with it. There are institutional and institutional problems, but there are also reasons for scientific traditions, scientific ethics, and so on. ”

It is said that hitting people does not slap their faces, but he has no scruples and does not give any face.

And his thought-provoking voice, as well as his sincere and unpretentious expression, made the vast majority of teachers and students hate it. Because when talking about "what is science", he once said an intriguing sentence: in an insane asylum, you can only say that doctors are crazy!

In other words, if Z Dazhen had degenerated to the point of hopelessness, he would never have said so much.

A professor in his fifties belonged to the minority, and he was obviously not convinced by the charter of the eloquent talks, so he grabbed the microphone and said: "Mr. Zhang, I admit that your laboratory has made a lot of academic achievements, but it does not mean that you have the right to point fingers at domestic institutions. Let's go small. You're disrespecting us! ”

Finally someone objected. The charter was not surprised. Walking to the podium, he said confidently: "This teacher may not know very well, although NB Lab is a public welfare research institution registered in Hong Kong and operating in Hong Kong, our experimental center is located in China, and has extensive cooperation with more than 30 domestic scientific research institutions and colleges such as the Chinese Association for Science and Technology, the Chinese Academy of Sciences, QH University, and BJ University.

At the same time, Mr. Gao Kun, the chairman of the academic committee of our laboratory, the former president of the Chinese University of Hong Kong, and the famous "father of optical fiber communication", is also a Hong Kong affairs consultant who loves Hong Kong and the country. What's more, Hong Kong will return to China in four years, and in the final analysis, they are all Chinese, and I think we have the obligation and responsibility to contribute to the development of domestic science. ”

Look at the professor's way of wanting to speak and stopping. The charter continued: "I have respect for the University, and I respect the history of the University, especially the old president of the University, Mr. Zhu Kezhen. It is because of respect that I have come here to communicate with teachers and classmates, and even plan to cooperate with the University of Z Medical School on behalf of the NB Laboratory Chemistry Center in the field of food safety, and I have also prepared a special fund for this.

As for the ones mentioned before, they are also completely for the sake of Z. You must know that the times are developing, society is progressing, and once people discover deceptive health products and harmful 'clenbuterol' in the future. It was first spread by Z University and became the consensus of the industry. Then you will probably be denounced as 'academic scum', and even Mr. Zhu Kezhen under Jiuquan may be disgraced by this." ”

Paper can't hold the fire, so many foreign newspapers have reported the harm of "Clenbuterol", and the domestic people will know about it sooner or later. Besides, human life is at stake, if someone dies and something happens because of this, the biggest is also to blame.

One of the more enlightened professors nodded and took over the topic: "Mr. Zhang, there are indeed problems in our work, and I would like to express my heartfelt thanks to you on behalf of our medical school. ”

"What's your last name?"

"Liu Chengjun, vice president of the School of Medicine."

"Dean Liu, it's an honor to meet you."

The charter raised it and said hello, and explained with a smile: "In fact, food safety is not the strength of our NB laboratory, and the reason why we put forward the intention of cooperation in this area is that we have an experimental center in China, and the Hong Kong Department of Health and Welfare and the Hong Kong Agriculture, Fisheries and Fisheries Department have great trust in us, so they commissioned the NB laboratory to conduct a sampling survey on the food exported from China to Hong Kong."

In other words, from now on, any food exported from China to Hong Kong will need to be tested at our experimental centre in the Hong Kong Special Administrative Region. Grain, oil, vegetables, chicken, duck and fish, finished products, semi-finished products, this workload is too large, we don't have so much energy, so we plan to cooperate with four domestic universities to set up a food safety laboratory to supervise and test the entire production process. ”

Vice President Liu asked suspiciously: "Mr. Zhang, does this mean that your laboratory will perform some government functions?" ”

"You can think so, but this is normal in Hong Kong and many western developed countries, not only authorized to some universities and scientific research institutions, but also authorized to some chambers of commerce and industry associations, such as the issuance of processing certificates, re-export certificates, reprint certificates, universal preferential tax source certificates, zero-tariff certificates of origin, and some product quality certifications, etc."

In cooperation with NB Laboratories, it is possible to issue the safety certificates required for the export of food products to Hong Kong, which is not only of extraordinary political significance, but also greatly enhances the status of the largest in the world.

Although there was a suspicion of slapping a sweet date, Vice Dean Liu still thought that this was a good thing, and couldn't help but look back, saw the principal and several vice presidents nodded slightly, and immediately said: "Mr. Zhang, all the teachers and students of our institute sincerely look forward to cooperating with your laboratory in food safety." If you can, I'd like to ask you to move to the guest house and have a more in-depth conversation about cooperation. ”

The charter raised his wrist and glanced at the time, and said apologetically: "Dean Liu, I'm very sorry, there are many affairs, and I really don't have time today." But don't worry, at the latest the morning after tomorrow, Dr. You Shaojun from our chemistry center will come to contact you and the university leaders on behalf of the NB laboratory. ”

This is already the best result, seeing that the principal and several vice principals do not want to know as far as I know, Vice Dean Liu smiled in frustration: "Students, Mr. Zhang is young and promising, he and his laboratory have made one world-renowned achievement after another, and there are not many opportunities to communicate with him face-to-face. I'll be the master and delay Mr. Zhang a little time. Mr. Zhang, please answer three more questions. Be representative. Who comes first? ”

"Me!"

"Dean Liu, I'll come first."

The atmosphere was extremely warm, and several rows of classmates who were closer to him stood up in unison, and no one wanted to miss this once-in-a-lifetime opportunity.

"Female classmates first, you come first."

A female classmate excitedly took over the topic and asked, "Mr. Zhang, you immigrated to Hong Kong and have been to Germany, the United States and Russia. What do you think about college students studying abroad? ”

After the reform and opening up, everyone realized that the United States and other developed Western countries did not just throw off China. Even in Asia, even the Asian Tigers seem to be stronger than China. Many people can't see hope, they have some ideas, they want to go abroad if they have some ability, some people want to see the world and master their skills to return to China, some people want to make more money and come back, and some people really emigrate.

The more than 1,000 students in the audience naturally couldn't avoid vulgarity, and they all wanted to see the outside world. And the graduate students who are admitted to the NB laboratory are undoubtedly a shortcut to go abroad.

It can be said that she has this problem. As Vice President Liu said, it is very representative, looking at the faces full of expectation in the audience. "If you love him, send him to New York, because it's heaven; If you hate him, send him to New York, because it's hell -- almost every Chinese family with a television has been waiting for these lines to appear. Because Liu Huan's singing will sound later, the opening of "Beijingers in New York" will appear. ”

The auditorium burst into laughter again, and after a pause, he continued, "Like all of you, I like this TV series very much, because it is very realistic and basically expresses the ups and downs of living overseas. Although I have no experience in this area, I have colleagues around me, and I even met a Chinese student in Silicon Valley, who graduated from a prestigious university in China and has a doctorate, but works as a dishwasher in the United States.

The fingers that should have been tapping on the computer keyboard, soaked in soapy water every day, just for a monthly salary of $1,000, he endured. Because washing dishes for a month is equivalent to working in China for three years. And the information he sent back to China often focused on 'one month of work in the United States is equal to three years', and deliberately weakened 'washing dishes'.

Perhaps it is precisely because of the huge material gap between the two countries, coupled with the fact that people who go abroad never report good news and not bad news, and when they come back, they also return to their hometowns in fine clothes, and all the money they earn in a year is bought and given away, and they enjoy the envy of a week or two, and then go back to work. As a result, many people have the impression that the United States is full of gold, so that they spare no effort to go abroad. ”

"Mr. Zhang, does this mean that you don't approve of us going abroad?"

"On the contrary, I am very much in favor of people going abroad, because there is not only a huge material gap between the two countries, but also a larger technological gap. If we want to make a difference in academics, we must go out and learn from the advanced science and technology and experience of the developed countries in the West. ”

He stepped down from the podium and shook hands with the teachers and students in the front row, and continued step by step: "Our NB laboratory regards learning from and communicating with our counterparts in western developed countries as a very important activity. For example, a fiber was pulled from Hong Kong so that colleagues from the Heung Kong Experimental Center could access the Internet; Another example is the establishment of a computer center in Silicon Valley to ensure that the laboratory keeps pace with the developed countries in the West in terms of computer applications;

In order to better learn the advanced technology of western developed countries, more than 80% of our researchers have joined the Institute of Electrical and Electronics Engineers of the United States, and 100% of our researchers must be proficient in English, and have the opportunity to go abroad to participate in various academic exchange activities. ”

The NB laboratory only looks for 100 doctoral students every year, and the number of domestic places is even smaller, even if the experimenters are counted, there will not be more than 300.

In a sense, it is more difficult to get into the NB laboratory than to get into the Ivy League schools in the United States. After all, it is a research institute, not a university dedicated to training talent.

The admission rules of the University of Z master's students have long been clear, and there is no need to waste an opportunity to ask questions. With the permission of Vice Dean Liu, a boy wearing glasses took over the topic and asked, "Mr. Zhang, the NB laboratory has made so many achievements in academics, do you think there is a chance to win the Nobel Prize?" ”

What an easy, and at the same time difficult question to answer.

After pondering for a moment, he said with a smile on his face: "The Nobel Prize rewards original innovative science and technology, achievements that have a significant impact on the entire civilization and social progress of mankind. To win the Nobel Prize, we must have the three elements of 'hard work + opportunity + spirit of cooperation'.

Many scientists have recognized that actively cooperating with Nobel laureates and masters of the same level, or becoming their students, or carefully reading their papers, and using their achievements for further development and development, is a "shortcut" to the Nobel Prize. But for this to happen, it is clear that a spirit of active cooperation will not work.

There are Nobel Prize-level masters in our NB laboratory, and there are not a few; We have a very good platform to read the papers of the masters and even cooperate with them; Over the years, we have developed a spirit of active cooperation, and we have made some major breakthroughs in some fields, and it can be said that we have met certain conditions for awards. ”

The boy asked again, "Mr. Zhang, who do you think is the most promising among your colleagues?" ”

"I wouldn't be surprised if one or two of the dozen directors and deputy directors of our Faculty of Basic Research all had Nobel Prizes today. However, the only achievements born in our laboratory are the discovery of 'carbon nanotubes' by Dr. Cai Yangzhi and Dr. Chen Wushou, and a series of in-depth studies on them. ”

Vice Dean Liu and others did not think that he was boasting, and several directors and deputy directors of the Department of Basic Research of NB Laboratory were academic champions in their respective fields. Even he himself is the pioneer of spintronics, and if he is in China, if he is a few years older, it is more than enough to be rated as an academician.

The last question was a bit of a philistine, and a teacher actually asked with a smile: "Mr. Zhang, you just said that in order to cooperate with the medical school of our school, you specially prepared a sum of funds, can you tell me how much it is?" ”

The charter replied lightly: "6 million yuan, of which 5 million is instruments and inspection equipment, and the other 1 million is cash, as the normal expenses of the food safety laboratory; In order to apologize, I would also like to donate 4 million yuan worth of computers to Z University in my personal name. (To be continued......)