This passerby is too calm

Chapter 220 218. Do you call this a crowd? ! (Second more)

Students who are eager to learn and feel that they can keep up with the progress are completely free to go to the lecture hall to listen to the lectures. If they do not understand the content of the academic report, they can also record it and watch it repeatedly.Therefore, filming is not prohibited here, and students are encouraged to record their studies.It is just suggested that students try not to make the videos they have taken public, and only use them for their own study.

"Hey, okay, you're studying~" the roommate joked.

"I also think he speaks well."

At this time, among the four of them, a girl suddenly spoke up.It was the only girl majoring in physics in the dormitory, different from the others, because of her professional counterpart, she had been listening subconsciously since Chen Mo started talking.When Chen Mo started writing on the whiteboard, she never took her eyes off the whiteboard.

"I can't see clearly here, I went to the front to listen."

As he spoke, he followed like a demon, his eyes were fixed on the whiteboard, and his subordinates quickly and messily pulled out a calculation notebook from the small bag that followed the sound, and ran forward.

Several people looked at each other.

Ugh?No, why are you going to the front all of a sudden?

Several people stretched out Erkang's hand silently behind them.

"You come back!"

It's not to stop girls from rushing to the ocean of knowledge, the main thing is, did you forget that your tutor is sitting in front?Did you forget that you dragged his research report and haven't given it to him yet!Several people watched the girl sit down in front of her tutor, Professor Carter, and silently wiped off her cold sweat.

well,

Very brave!

Girls dare to be so brave, but they don't dare.Although M University is famous for being very competitive, because it is too introverted, at the end of the first year of undergraduate freshman year, nearly half of the total number of students can be screened out, and everyone who can stay is a ruthless person, and they are no exception.But they didn't dare to go directly to the first row at this time, and being stared at by several professors, their scalps tingled just thinking about it.

But seeing that my roommate was so interested in the content of the lecture, I couldn't help but also became interested.Although several of them are not majors in physics, they are all majors in related science and engineering, and they can understand some of them if they listen carefully.I listened and listened unconsciously.Without knowing when, the body moved several positions forward, and before they knew it, they put on their glasses one after another, took out their notebooks, and copied the writing on the blackboard.

"The structure of the SPR-MF sensor we designed is shown in Figure 1. The dual-core MF contains three layers of air holes arranged in an equilateral triangle lattice, the lattice constant is L, and the diameter of the air hole is d3. The two cores are located at the corresponding positions of the air holes in the second layer, and are marked as 2 and 2 respectively. In order to better adjust the mode effective refractive index of the fundamental mode of the core, so that the sensor can work in a wider wavelength range, We introduced 1 small holes in the central region of the core, filled with the sample to be tested, with diameter d2..."

While explaining, Chen Mo pointed to the schematic diagram of the cross-section of the sensor on the slide with an infrared pen.

Several old people in the audience were also very interested when they heard the words, and whispered sideways to communicate with Teacher Liang beside him.

……

At this moment, Lu Wenxuan walked into the lecture hall together with several professors.

"...Really? The teacher is really brave enough to take on this speech at such a young age. I have to take a good look... It seems that today's report will be very lively." Lu Wenxuan said with a half-smile, Pull out a smile and chat with several professors.While chatting, they walked into the lecture hall.

Seeing the deserted look in the huge lecture hall, he paused and raised his eyebrows slightly.

He didn't speak, but Jack beside him spoke first for him.

"It seems that this report will not be very popular, why are there so few people! Teacher, has their report not started yet?"

Lu Wenxuan suppressed a low smile from the bottom of his heart, pretending to reprimand and said:
"Jack! Don't mess around."

"It seems that he is indeed a little younger. It may be the first time to give a report on stage, and he is young and nervous. It's okay, and the report doesn't care whether there are many people listening." Lu Wenxuan said with a smile to his friends.

"It's true that there are fewer people, maybe it's because of the meal... It's normal to have fewer people, and the paper is still very good. I read it from Lao Liang before." The professors here didn't think much at first, but after hearing this, Thinking of my report meeting in the morning, and the number of people who held the report meeting before, the few people in this huge lecture hall are really pitiful.Except for the professor who read the report paper, the other professors who were called by Professor Liang Rui frowned slightly at the young man on the stage from afar, and wondered why he took this time to take a walk. Not worth it.

"To be appreciated by Professor Tom, the report itself must be good. Let's go and have a look." Seeing this, Lu Wenxuan slightly twitched the corner of his lower lip.

"It's just that there are few people... I won't let you talk about it." Jack followed a few people to the door, babbling in a low voice.

……

"Of course, we also fully considered the interference problem when designing. In order to improve the signal-to-noise ratio of the sensor and eliminate the crosstalk between the sample channels, the central region of the fiber has only one diameter of d1, and the inner surface is coated with ITO (thickness t). The large circular air hole is used as the sensing channel of the sample to be tested. na is the refractive index of the sample to be tested, and its value is between 1 and 1.423; the refractive index of air is 1.513. The substrate material of the optical fiber is Si O1, Its refractive index can be calculated by the Sellmeier equation...where: l is the wavelength of the incident light. ITO is used as a plasma material, and its relative permittivity e can be calculated by the Drude model..."

While Chen Mo was talking, he was writing formulas on the whiteboard with a black marker.Because the calculation ability is very fast, he almost substituted the given parameters into the formula at the same time as he gave the formula, and obtained the result again.Because there is an extra calculation process, everyone has traces to follow in the derivation of each data, and it is not tiring at all to follow along.

He clearly understood the operation and reason of each step, and even because Chen Mo carried the calculations, he saved the time of complicated calculations by himself, and saw the research ideas directly and clearly.This is not enough for practical and computing experience, and it can be said to be very friendly to M college students who are struggling.

Several professors also noticed Chen Mo's intentions, and they all laughed in a friendly manner.

The students of the professors are not bad. They have had a lot of experiments with the professors, and they can keep up with these calculations if they are slower, so they won't be too strenuous to listen to.But they were a little surprised at Chen Mo's calculation speed and mental arithmetic ability, and how he was able to take care of them on this occasion, giving him the calculation process again.Isn't he nervous to give a report at this level of exchange meeting?

Li Shuying and the others are also okay. They don't necessarily need to fully understand the report by themselves, and they don't think it's okay.But for the eight or nine M college students who came to listen to the topic of today's "optical fiber" and are doing research in this field, they all feel like hugging the lecturer of this lecture and kissing him hard!Because this is the least tiring one they have listened to since morning.Because they want to understand very much, so every scene is very tiring.This scene was a rare one that didn't get stuck. There was an inexplicable urge to cry, and finally they didn't feel that they were mentally handicapped waste. They had been rubbed for a long time and they almost burst into tears at this moment.The most rare thing is that the gold content of Chen Mo's research report is not low.

What kind of immortal reporter is this? They are too friendly to these research monks.

So, in a thousand-person exchange forum of a certain M university.

"Brothers, have you finished your meal? Are you still listening to the lecture in the afternoon? The current location: Classroom ** on the 5th floor of Building C, come quickly, there is a pretty good lecture here."

"Good guy, it's in the cafeteria. I know the lecture you mentioned. It's really a fairy time to arrange it at one o'clock. It seems that the speaker has never heard of it. I feel that the gold content is generally so I didn't listen to it..."

"It's great, it's great, it's really great! Come quickly, while there are still few people! Quietly tell you, Professor Charlie De and Professor Carter are here."

"Good guy! Professor Charlie De?! I'm coming!"

"This lecture contains a lot of gold. If you really miss it, you will regret it. The big guy who gave the lecture explained it too clearly. Come quickly!! I have a hunch that if you don't come, the classroom will soon be full! I see that there are many people in the classroom. People are lowering their heads to send messages, they should all be calling for someone. Well, someone came in through the back door."

"Is that the ** classroom on the 5th floor of Building C? Come right now!"

Some of the M University students who were sitting there took out their mobile phones and sent a link to the lecture location to their classmates and friends who were hit and vomited in the morning.Someone posted the name and location of the lecture on the campus forum.

(End of this chapter)