A large part of the reason why many people are confused when they arrive at university is that the evaluation criteria have changed from one-dimensional to multi-dimensional.
In the past, during high school, examinations were often organized from the city to the school and then to the class, which allowed you to have a precise positioning of your performance in the whole school and even the whole city.
One-dimensional evaluation criteria coupled with repeated testing make it easy for people to improve themselves.
At the university level, the evaluation system has become multi-dimensional, and the requirements for students no longer just focus on test-taking ability. Teachers in high school never taught students what they can do and what they need to do in college.
At this time, most people will be confused.
For example, Cao Yongluo's family had made arrangements for him early in the morning, and he only had to follow the route planned by his family step by step.
Zhou Xin came back from the era of information explosion and knew exactly what he wanted to do.
As for Wang Wei and Li Li, after entering Yan University, they found that they could not pass the test papers of these top test papers. There were only midterm exams and final exams in the year, and they had no idea what they had to learn to rank high.
Pure blind box opening.
When they first entered the freshman year, the two of them studied very seriously for a period of time. The problem was that it was ineffective and their grades were only in the middle of the class.
Zhou Xin has a certain understanding of these, but he doesn't care.
For him, he plans to contact his previous mentor, Professor Hu Zhengming, as soon as possible.
After this period of data and information collection, Zhou Xin made it clear that this time and space was exactly the same as the time and space before he came.
He also searched for Hu Zhengming's information on the Internet. If his guess was correct, then Hu Zhengming's email address was still the same as before.
Because he studied for a doctorate with Hu Zhengming for four years, Zhou Xin had either read most of his papers or learned about them through citations in other papers.
This is quite a difficult thing, considering that Hu Zhengming has more than 900 papers.
The reason why I wanted to find Hu Zhengming was not only because of his status in academia, but also because of his connections in the industry.
"Dear Professor Hu Zhengming:
When I read your paper on the improvement of the hot electron sensing MOSFET degradation model, I got some new ideas that can be used to improve your optimized mathematical model..."
Zhou Xin's plan was very simple. He still had to find Hu Zhengming, go to Berkeley to get his PhD, and then use the leading edge of technology to start a business in Silicon Valley.
After the business is successful, he will return to China.
It is too difficult to start a business in China with this status.
In other words, it is too difficult to engage in semiconductors.
After a little preparation, Zhou Xin sent a paper on further optimization of the MOSFET model to Hu Zhengming’s email address.
Hu Zhengming has been teaching at Berkeley since 1976, and his email address has never changed.
Starting from actual MOSFET transistors and deducing mathematical models in the field of complex physics, this is Hu Zhengming's proud work.
This paper, published in 1985, has been cited nearly 2,000 times, making it second only to the FinFETch architecture.
In this era, this mathematical model was selected as the first and only international standard for designing chips by the Transistor Model Council involving 38 major international companies.
Since the paper was published in 1985, various studies have attempted to improve the model.
In 1994, there was an attempt to optimize the model through thin nitride oxide, and in 1995 there was an attempt to optimize through thermal re-emission of electrons.
However, these studies all achieve the purpose of optimizing MOSFET transistors through the material level and by changing the transistor materials.
It has not yet started from the mathematical model level to optimize the results of Hu Zhengming's MOSFET model.
You must know that thirteen years have passed since 1985.
Professor Hu Zhengming, who is far away in the San Francisco Bay Area, checks his mailbox every morning as usual.
E-mail has a history of more than ten years. In the past ten years, thanks to e-mail, scientists from all over the world have become more frequent in communicating.
For Hu Zhengming, the first thing he does when he comes to the office every day is to check emails instead of paper mails.
An email titled MOSFET model optimization quickly attracted his attention.
After all, as the creator of the model, Hu Zhengming himself hopes to further optimize it.
Unfortunately, neither he nor other scientists can optimize MOSFET from the perspective of mathematical models.
"...this critical energy and the observed time dependence can be explained by a physical model involving =Sis H bond breaking. The device lifetime is proportional to I-2sub 9 I1d9ΔV15t. If due to small L or large Vd If Isub becomes larger due to other reasons, τ will become smaller. Therefore, Isub (and possibly light emission) is a strong predictor of τ.
The proportionality constant has been found to vary by a factor of 100 across different technologies, providing hope for significant improvements in reliability through future improvements in dielectric/interface technology. A simple physical model can relate the channel field Em to all device parameters and bias voltage. Its use in explaining and guiding hot electron scaling is described. "
Because the mathematical model constructed by Hu Zhengming is very simple and simply depicts the nature of MOSFET degradation.
The simpler the model, the more difficult it is to optimize.
But this email provided Hu Zhengming with a new angle to think about this issue.
The optimized mathematical model can explain more phenomena, allowing for better monitoring of the phenomenon of hot electron scaling.
In order to read this email, Hu Zhengming completely forgot about coffee.
After reading the core part, he went back and looked at the email who sent him, zhouxin@, an email from Yanda.
"Zhou Xin? I've never heard of such a number one figure in the semiconductor field at Yanda? And logically speaking, shouldn't he publish a paper?" Hu Zhengming was very puzzled in his heart.
Generally speaking, those who can make this level of innovation will not be unknown people.
Hu Zhengming read the last part of the email again. The last part of the email expressed his hope to study for a Ph.D. under him.
Only now did Hu Zhengming understand why the other party sent him this email.
It turned out to be this way to attract his attention.
He had received similar emails from Chinese students before, trying to get a letter of recommendation from him by expressing his views on scientific research and his thoughts after reading some papers.
Twenty years later, this would be called magnetism.
It’s just that these cross-border emails from Chinese students are just an idea at best.
And what Zhou Xin sent over, with a little summary, can be called a complete paper, but a paper that can be published in a top journal.
Hu Zhengming planned to reply to the other party by email and make a phone call to have a detailed chat.
It is rare for a paper of such high quality to be written by a college student.
Hu Zhengming hoped to further confirm the other party's level through direct calls.
