A big reason why many people feel confused when they go to university is that the evaluation criteria have changed from one-dimensional to multi-dimensional.
In the past, when I was in high school, exams were often organized from the city to the school and then to the class, which allowed you to have an accurate 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 becomes multi-dimensional, and the requirements for students are no longer limited to test-taking ability. In high school, teachers never teach students what they can and need to do in college.
At this time, most people will be confused.
For someone like Ryan Cao, his family had already arranged everything for him, so he just had to follow the route planned for him step by step.
Alex Zhou came back from the era of information explosion and knew exactly what he wanted to do.
As for Kevin Wang and Tyler Li, after entering Yanjing University, they found that they could not beat these test-taker kings. There were only midterm exams and final exams in a year, and they had no idea how much they had to study to be able to rank high.
Just open the blind box.
When they first entered college, they studied very hard for a period of time, but the problem was that there was no effect and their grades were only in the middle of the class.
Alex Zhou has some understanding of these, but he doesn't care.
For his part, he plans to contact his former supervisor, Professor Victor Hu, as soon as possible.
After collecting data and information over this period of time, Alex Zhou confirmed that this time and space was exactly the same as the time and space before he came here.
He also searched for Victor Hu's information on the Internet. If his speculation was correct, then Victor Hu's email address would still be the same as before.
Because he studied for a doctorate with Victor Hu for four years, Alex Zhou had either read most of his papers or had some understanding of them through citations in other papers.
This is not an easy task, considering that Victor Hu has published more than nine hundred papers.
The reason for going to see Victor Hu was not only because of his status in the academic world, but more importantly, his connections in the industry.
Dear Professor Victor Hu:
While reading your paper on the improvement of hot electron induced MOSFET degradation model, I got some new ideas that can be used to improve your optimized mathematical model."
Alex Zhou's plan was simple. He still had to find Victor Hu, go to Berkeley to get his doctorate degree, and then use his technological leadership to start a business in Silicon Valley.
After the business is successful, I will return to China.
It is too difficult to start a business in China with this identity.
Or maybe it’s too difficult to make semiconductors.
After a little preparation, Alex Zhou sent a paper on further optimization of the MOSFET model to Victor Hu's email address.
Victor Hu has been teaching at Berkeley since 1976, and his email address has never changed.
Victor Hu's masterpiece is to deduce mathematical models in the complex physical field based on actual MOSFET transistors.
This paper, published in 1985, has been cited nearly 2,000 times and is his second most important achievement after the FinFETch architecture.
In this era, the mathematical model was selected by the Transistor Model Council, which was attended by 38 major companies in the world, as the first and only international standard for chip design.
Since the paper was published in 1985, there have been various studies attempting to improve the model.
In 1994, there were attempts to optimize the model by thinning oxide nitride, and in 1995, there were attempts to optimize it by thermal re-emission of electrons.
However, these studies all aim to optimize MOSFET transistors at the material level by changing transistor materials.
There has been no effort to optimize Victor Hu's MOSFET model from the perspective of mathematical model.
You have to know that it was thirteen years since 1985.
Professor Victor Hu, who is far away in the San Francisco Bay Area, checks his email every morning as usual.
Email has been around for more than a decade. Thanks to email, scientists from all over the world have been able to communicate more frequently over the past decade.
For Victor Hu, the first thing he does when he arrives at 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, Victor Hu himself also hopes to further optimize it.
Unfortunately, neither he nor other scientists were able to optimize MOSFET from the perspective of mathematical models.
".This critical energy and the observed time dependence can be explained by a physical model involving the breaking of =SisH bonds. The device lifetime is proportional to I-2sub9I1d9ΔV15t. If Isub becomes larger due to, for example, small L or large Vd, τ will become smaller. Therefore, Isub (and possibly light emission) are strong predictors of τ.
The scaling constants have been found to vary by a factor of 100 for different technologies, which offers hope for significant reliability improvements 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 Victor Hu is simple, it simply depicts the essence of MOSFET degradation.
The simpler the model, the harder it is to optimize.
But this email provided Victor Hu with a new angle to think about this issue.
The optimized mathematical model can explain more phenomena and thus better monitor the phenomenon of thermal electron scaling.
In order to read this email, Victor Hu completely forgot about coffee.
After he finished reading the core part, he went back to see who sent him the email. It was from Yanda University.
"Alex Zhou? I've never heard of such a person in the semiconductor field of Yanda University? And shouldn't he publish papers?" Victor Hu was very puzzled.
Generally speaking, people who can make innovations of this level are not unknown people.
Victor Hu looked at the last part of the email again, which expressed the hope to study for a doctorate under him.
Victor Hu now understood why the other party sent him this email.
It turns out that this is the 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 their views on scientific research and their thoughts after reading some papers.
Twenty years later, this is called magnetism.
But these cross-border emails from Chinese students are just an idea at best.
The paper Zhou Xinfa sent over can be considered a complete paper if it only adds a brief summary, and it can be published in a top journal.
Victor Hu planned to reply to the other party's email and make a phone call to discuss the matter in detail.
It is rare to see a paper of such high quality written by a college student.
Victor Hu hopes to further confirm the other party's level through direct conversation.
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