The two who have just confirmed their relationship are naturally very tired of being together.

So in order to enjoy this kind of good time more, Mu Jingchi did not drive back to the community directly, but parked the car outside.

Then he walked into the community hand in hand with Song Xiaoyi, and slowly paced towards the building area.

"Okay, let's go in?"

took the elevator to the 27th floor, Mu Jingchi let go of Song Xiaoyi's hand, the two were going to be separated temporarily, and they still had to go back to their respective homes. Of course, he doesn't mind Song Xiaoyi going to his house, but it's better not to take the initiative to be so eager.

Song Xiaoyi's palm was released, but her index finger was still hooked on Mu Jingchi's hand, shaking her own arm, and even her own body was swaying from side to side, looking up at Mu Jingchi with her big eyes, expressing a cute and reluctant expression.

Mu Jingchi saw such a cute scene, where could he bear it.

With a pull of his left hand, he pulled Song Xiaoyi's body over, then rubbed him in his arms, lowered his head and kissed it.

Song Xiaoyi also closed his eyes and responded as best he could.

His hands crossed Mu Jingchi's waist, wrapped up, and finally hugged his back tightly, and the whole person seemed to melt into the other party's body.

Long.

Lip splitting.

"Let's go in!" Mu Jingchi's lips pursed slightly, as if he was tasting the taste of kissing, "If you don't go in again, Auntie should be impatient to wait below." ”

Song Xiaoyi listened to Mu Jingchi's words, and was a little puzzled, "What?"

The corners of Mu Jingchi's mouth curled into a beautiful arc, with a bit of cunning, "When we came back, Auntie was hiding on the side of the road and secretly watching us!"

Song Xiaoyi reacted immediately, dumbfounded, "You mean, my mother?"

Mu Jingchi nodded, and the smile in his eyes became even narrower.

"You... Song Xiaoyi's thinking was a little confused, and he didn't know what to do, pointed to Mu Jingchi, and then pointed to the elevator, and finally turned into a sentence, "Why don't you tell me?"

"Why do you say that, our relationship is just and bright, and it's not sneaky. ”

Mu Jingchi said funny.

Then, he walked into his house with a bad taste, leaving Song Xiaoyi alone to face her mother.

"Mu Jingchi!"

Song Xiaoyi shouted.

···

Why go back to your own home.

In fact, Mu Jingchi was also a little overwhelmed.

When he was shopping with Song Xiaoyi, he saw Aunt Zhao, but at that time he was holding hands with Song Xiaoyi and chatting, and it was not his character if he let go.

Since he chose to confess to Song Xiaoyi, it was the result of careful consideration.

I won't give up because of someone else.

Presumably Aunt Zhao also saw the situation of the two of them at that time, if she let go, it would not only be bad for Song Xiaoyi, but also leave a bad impression in Aunt Zhao's heart.

As for how to face Aunt Zhao in the future, Mu Jingchi didn't know what to do, and took one step at a time. After all, when I arched my daughter, there was always a feeling of weakness.

Shaking his head and throwing these thoughts out, Mu Jingchi walked into the study and began his journey to continue studying.

I have been socializing outside because of the project before, and I don't have any motivation to study after I get drunk, so I have delayed the pace of learning for a few days.

Mu Jingchi must pick up this rhythm, otherwise he will develop a lazy habit if he continues to indulge.

Mathematics, Physics, Mechanics of Materials (2100 edition).

These three major contents are the focus of Mu Jingchi's learning, and after a full sense of ritual preparation, Mu Jingchi began to study seriously under the effect of 'IQ improvement' in the study.

An hour later.

Mu Jingchi frowned and put down the pen in his hand.

"The mechanics of materials in the past 2100 years are still a little more difficult, and they are not what I can understand at my current level. ”

Although he had been studying it for a while, Mu Jingchi felt that his progress was too slow. There are two reasons, on the one hand, the accumulation of mathematical and physical knowledge is insufficient, and the knowledge framework system of the two has not been fully built, and on the other hand, the knowledge in the 2100 edition of material mechanics is too faulty for Mu Jingchi.

"The development of mechanics of materials in 2100 also involves mathematics and physics. There are too many contents that have not been solved in the current era, but in that era, they have entered the stage of rich application, and the gap is too big, and the knowledge gap is too serious. ”

"I have to put it on hold for the time being, and now the focus is on mathematics and physics. ”

In the past, Mu Jingchi did not have the idea of shelving, after all, this is also the accumulation of knowledge.

But now it's different.

Now he is the person in charge of the national project, and he has a lot of things to do, and he is not just a simple researcher, which is very different from the previous situation.

The School of Materials Science and the Institute of Industry and Information Technology of Huaqing University are mainly responsible for the promotion of dislocation theory, while the School of Mechanical Engineering is mainly responsible for the application of theory.

Then the requirements for Mu Jingchi will also be higher, he needs to participate in various conference topics, review various projects, participate in the analysis of various experimental results, and so on.

These feedback to Mu Jingchi means that he still needs to continue to learn.

Only when he himself is strong can he talk and laugh with these scientific research leaders in the same project, understand their ideas, and even use his own advantages to guide each other's research directions.

A more conspiratorial idea, you won't be taken advantage of by others.

For the material science related to the dislocation theory system, Mu Jingchi has completely absorbed it. However, the gap between him in mathematics and physics is a bit big, in terms of mechanical analysis, elastic mechanics, fracture mechanics, numerical analysis, engineering mathematics, mathematical and physical equations, etc., Mu Jingchi has a gap with the scientific research leaders in the project.

"I overestimated myself, self-study is still a bit messy, and I need to go to the Faculty of Science to ask the big guys in the Department of Mathematical Sciences and the Department of Physics. Mu Jingchi sighed, very dissatisfied with his learning progress.

Following.

Mu Jingchi came to the Science Building and found Tan Jun, a professor in the Department of Physics.

Last night, Mu Jingchi, who realized that his study efficiency was low, called Professor Yang Wenwu and asked him to introduce the professor of mathematics and physics in the Faculty of Science.

And Tan Jun is the physics boss introduced by Yang Wenwu to Mu Jingchi.

Knock, knock, knock.

The door of the office was wide open, and Mu Jingchi knocked on the wooden door, attracting the attention of Tan Jun, who was reading a monograph on condensed matter physics.

Professor Tan wears a pair of glasses, the kind of old style from the last century, which looks like a retro taste. Although the hair is a little thin, it can be seen that it pays great attention to appearance and is well managed.

Originally, it was a very angry thing to be interrupted, but when Professor Tan saw the visitor, he laughed happily.

"Dr. Mu, welcome. ”

Mu Jingchi's current status and his title are a little embarrassing, although the professor title arranged by the school has been evaluated, but it has not been officially issued, so it is definitely not okay to call Professor Mu.

Calling Xiao Mu is definitely even worse.

That's something that only people close to you can shout like that, such as Professor Yang Wenwu. Others want to shout that Xiao Mu at least has a good relationship and enough qualifications, such as Du Cunyi.

But these two points have not been reflected in Professor Tan Jun, and now Mu Jingchi's scientific research achievements have begun to appear, and he can't be suppressed by his qualifications. As for the close relationship, there is no one, and as for the elderly, there is really only the identity of the elders.

So, most people call Dr. Mu directly.

Anyway, now that Mu Jingchi has officially graduated, and the two certificates are in hand, this title is completely fine.

"Professor Tan, you're welcome. ”

After Mu Jingchi came in, he didn't ask his own question directly, but chatted with Professor Tan. Starting from Huaqing University, we talked about education and research. Sometimes he reminisced about the past, and sometimes praised Professor Tan's educational and research work.

After some conversation, the strange estrangement between Mu Jingchi and Professor Tan gradually dissipated and became familiar.

That's when he started asking his own questions.

"Professor Tan, I came to you this time to guide me in my studies. ”

Professor Tan smiled and shook his head, "The guidance is polite, learn from each other, learn from each other." ”

Mu Jingchi did not dwell on the politeness in this discourse, and talked about his own related problems in physics learning.

Professor Tan listened very carefully and did not interject at will, until Mu Jingchi talked about his self-learning process, self-learning experience and self-learning difficulties from beginning to end, and then he pondered and spoke.

"So, Dr. Mu, are you focusing on mechanics?"

Mu Jingchi nodded, "Isn't it right to focus on mechanics?"

From a historical point of view, mechanics is the foundation of physics and belongs to physics. From a broad point of view, physics contains four major interactions, strong interaction force, weak interaction force, electromagnetic force, and gravitational force, which also belong to the category of mechanics.

But in China, mechanics and physics are separate.

A large part of this is due to national conditions.

After all, it has only been a few years since the reform and opening up, and the faculty is indeed insufficient, but scientific research and work production need talents in the fields of mechanics and physics, so they can only be divided into two first-level disciplines as a last resort.

Therefore, the current mechanics is generally mainly concerned with the problem of material interaction in the macroscopic field, and as for the cosmic and microscopic, they are automatically classified as physics.

The former is mainly theoretical mechanics, structural mechanics, material mechanics and elastic mechanics, while the latter also has theoretical mechanics, followed by thermodynamics and statistical physics, electrodynamics and quantum mechanics.

Professor Tan looked at Mu Jingchi and shook his head, "I can't say it's wrong, it's just not enough." ”

"If Dr. Mu is the main mechanical engineering and focuses on mechanics, it is no problem, after all, they all use the basic principles of mechanics to solve specific problems encountered in engineering science and technology. ”

"But Dr. Mu is different, you are doing materials research and development, and you can also participate in the application of materials, just mechanics is not enough, maybe it is better to add a condensed matter physics. ”

Condensed matter physics is a discipline that studies the physical properties and microscopic structure of condensed matter and the relationship between them, that is, to understand the physical properties of condensed matter by studying the motion forms and laws of electrons, ions, atoms and molecules that make up condensed matter.

On the one hand, it is an extension of solid state physics, so that in addition to solid substances, the research object also includes many liquid substances, such as liquid helium, molten salt, liquid metal, as well as liquid crystals, latex and polymers.

On the other hand, it also introduces a new conceptual system, which is not only conducive to dealing with many difficult problems left over from traditional solid physics, but also convenient for popularization and application to some substances that are more complex than conventional solids.

Now it is gradually replacing solid state physics as the name of the discipline, or understanding solid state physics as a synonym for condensed matter physics.

"Is that so?"

Mu Jingchi muttered that solid state physics is a professional course in materials science and engineering, and he has naturally studied it. This course is very difficult, even if it is an undergraduate at Huaqing University, the average score of each exam is more than 50 points.

Solid state physics is so difficult, and if you think about the more complex and esoteric condensed matter physics, it is simply dead brain cell behavior.

"Mechanics is biased towards application, but condensed matter physics is biased towards theory, and the combination of the two should be of good help to Dr. Mu's materials research. ”

"Moreover, you have a strong foundation in science, and it is not difficult to add a condensed matter physics. ”

"Many things in mechanics are similar to physics, for example, continuum mechanics and electrodynamics have a certain similarity, and the similarity with general relativity is not small; ”

After saying a few words in a row, Professor Tan Jun also had a dry mouth, picked up a water cup from the desk and took a sip of tea.

Mu Jingchi listened quietly and did not interrupt the professor's speech.

"Also, a lot of the things about vibration dynamics are related to solid state physics. Many transformations in solid state physics are actually quite similar to the various fancy ways of finding normal coordinates in vibration dynamics, and vibration dynamics also takes into account the solutions of wave equations under many periodic lattices. It's also very similar to the Bloch wave in solid-state physics that seeks electrons. ”

"The Society of Fracture Mechanics and Plastic Forces involves some knowledge of thermodynamics and statistical physics, which will also help you learn physics, finite element analysis is somewhat similar to computational physics, and mathematical methods, mechanics and physics are both studied in the department. ”

"So, what you really need to make up is quantum mechanics, quantum field theory, many-body physics, and advanced solid state physics theory. ”

Professor Tan Jun's words were very popular, and Mu Jingchi also heard them clearly.

"However, if you study mechanics and condensed matter physics together, you can't be bad at math. Because the mathematical framework of the two is somewhat different. ”

"The mathematical framework in mechanics is mainly analytical tools such as calculus, complex variable functions, constant/partial differential equations, and functional analysis. But physics is a little different, the mathematical framework of the broad phase is differential geometry, the mathematical framework of quantum mechanics is the Hilbert space, and quantum field theory involves more knowledge of group theory, group representation theory, etc. ”

"The difficulty lies in the understanding of the mathematical framework (abstract algebra, topology, etc.) and the corresponding relationship between actual physical quantities and physical equations. ”

Mu Jingchi's face could only pull out a helpless wry smile, "I'm not very good at math, and I'm going to talk to Professor Mei about learning math later." ”

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Stealing incense