As for what to write in the third paper, Zhou Chen has his own thoughts. Pen ~ fun ~ pavilion www.biquge.info

The first two papers, whether it is "On the Thermodynamic Laws of Black Holes" or "Simultaneous Transitivity", are overly theoretical.

These two papers can establish his position in the theoretical world, but they are still too far from practical application.

In the third paper, Zhou Chen is going to write something practical that can be directly used!

Physics, especially astrophysics, is a discipline of observation, and only if the observed results are consistent with theoretical inferences, then the theory can be proven correct.

In addition to the hardware aspect of observation, radio astronomy such as spectroscopy, photometry, and photography are the theoretical basis of observation.

Our information about distant celestial bodies mainly relies on receiving the electromagnetic radiation emitted by them, and then gaining insight into its physical nature by analyzing the radiation intensity, spectral distribution, polarization properties, etc. of the celestial body. But as Zeric says in Astronomy and Astrophysics, for very distant celestial bodies, people only see a two-dimensional scene projected on the sky dome, and the "intuitive" scene is often deceived in astronomy!

How we judge that the information we receive is correct is the premise of all subsequent analysis. If there is a difference between the signal we observe and the signal emission source itself, then is there still point in making observations?

Therefore, the topic of Zhou Chen's third paper is related to the observation of signals, to be precise, to understand the law of connection between the final signal and the source signal in the process of signal transmission!

This can be divided into two contents, one is the radiation emission mechanism inside the celestial body and the interaction between the radiation and the matter of the celestial body when the radiation propagates from the inside to the outside, which is called the radiative transfer equation, and its solution is the connection between the physical parameters of the celestial matter and the spectral lines we last observed; The other is that after the radiation leaves the celestial body, it interacts with the matter along the way between the universe in the process of propagation, showing various radiation states.

What Zhou Chen wants to do is to establish a set of theoretical formulas about radiation, from the radiation transfer equation to the radiation state equation, and organically combine them to form a unified theoretical system, which can provide more accurate theoretical support for the radio observation of the earth.

Zhou Chen titled the paper "Equation of State for Radiation Propagation of Celestial Bodies".

This is a very ambitious project, and it took Zhou Chen a few days to write its outline.

In contrast to the complex mathematical derivation in On the Thermodynamic Laws of Black Holes, and the Simultaneous Transitivity, which is purely ideological and involves a small number of calculations, the Equation of State of Radiative Propagation of Celestial Bodies can be said to be a completely mathematical accumulation of formulas.

Zhou Chen roughly estimated that there may be no less than 100 differential, integral, and partial differential formulas involved, and if you count the high-level conversion, the number is very amazing.

How to simplify the complex is the key to making it practical.

Fortunately, now he can directly use the computer to analyze, he only needs to let Dan Dan mathematically deform the "equation of state", so as to remove the trivial details, leaving a relatively practical core component, and then directly use the computer to apply this formula.

……

In the evening, after having dinner with Yang Xi, Zhou Chen sent Yang Xi back to the dormitory.

In the middle of the dormitory, you have to pass through an artificial river, and the willow trees on the bank of the river are pumping, and the long willow branches hang high, and the wind blows, swaying neatly. The breeze is full of stars, the moon and stars are sparse in the sky, and a vast sea of stars is sprinkled on the black curtain like beans.

Zhou Chen intimately helped Yang Xi brush his wind-blown hair, and then waved goodbye, while Yang Xi was charming and drunk, walking into the dormitory building with a smile on his face and a happy mood.

At this time, in a certain building of the girls' dormitory, a young girl was sitting on the balcony bored, she crackled and pressed her mobile phone a few times, and then lowered her head, just in time to see the scene of Zhou Chen sending Yang Xi to the bottom of the dormitory.

The mobile phone snapped off from her hand, and the girl reacted and hurriedly bent over to pick it up, but there was already a fall mark on one side of the fuselage, and the girl wanted to cry without tears: "Bi Qiniang, the baby's kidney six!" ”

The tangled emotions instantly turned into outpouring anger, she wiped away her tears, stood up and continued to rub the phone shell, her eyes were full of courage and fearlessness!

Yang Xi came to the door of the dormitory with brisk steps, but she didn't know that what was waiting for her in the dormitory was the serious expression of her roommate. As soon as he entered the door, Yang Xi felt a pair of eyes that were as sharp as small light bulbs.

"What's the matter, why are you looking at me like that?" Yang Xi looked at his roommate's eyes, and suddenly felt a little hairy in his heart, and reflexively took two steps back.

The accommodation conditions of Beijing Normal University can only be said to be average, and a dormitory with only three people in a room like Yang Xi is already a relatively good condition. At this time, I saw that the roommate turned into a jackal, tiger and leopard, locked the door at once, and then buckled Yang Xi to the bed and prepared to torture him.

"Concubine Hua, what are you doing, let go of me!" Yang Xi panicked and shouted loudly at the tall girl.

"Haha, you shout, even if you shout and break your throat, no one will be able to save you today!"

The girl named Concubine Hua smiled gloomily, because she was surrounded by girls' dormitories, she was only wearing a thin light gauze pajamas, under the vacuum gauze skirt, a pair of pale panties loomed, and her chest was tall and straight, showing the graceful posture of a girl.

At this time, she rode on Yang Xi very indecently, pressing one of Yang Xi's hands with her knees, and the whole person was like a reckless man who was committing violence, making Yang Xi unable to move.

"Concubine Hua, what are you crazy about, your head is convulsive......" Yang Xi shouted with struggle.

"Yes, my head is convulsed, if it weren't for you, the baby's kidney six wouldn't have fallen...... Don't talk about it, it's all tears if you talk too much! ”

At this time, the door opened from the outside, and a girl who was a little shorter than Yang Xi walked in with a basin.

She was wearing a thin pajamas, humming a small tune while wiping her wet hair, and when she saw the violent scene in the room, she couldn't help but be startled, and then put down the basin, ran over with slippers, and joined the war against Yang Xi without saying a word.

"Concubine Hua, Shen Yu, let go of me!!" Yang Xi struggled desperately, overwhelmed.

"Sister Concubine, why are we pressing Sister Xi'er?" The girl named Shen Yu glanced up at the tall girl and asked with some puzzlement.

"Because your sister Xi'er betrayed the revolutionary friendship forged between us with blood, and said that we would be single until we graduated, but she betrayed the revolution!" Concubine Hua's face was gloomy, and she gritted her teeth.

"What? Sister Xi'er has found a boyfriend? When was this! When Shen Yu heard this, his pretty face became serious.

"I'm afraid it's been a few days, I said, why has Xi'er always gone out early and returned late in the past few days, and every time she comes back, she looks happy with a spring breeze on her face." Concubine Hua said fiercely, "If I hadn't been bored just now sitting on the balcony watching the stars at night, and accidentally saw the picture of you and me downstairs, I don't know how long I would have been hidden!" ”

"Oops, I didn't expect Sister Xi'er to be so fragile that she couldn't withstand the temptation of a sugar-coated cannonball!" Shen Yu looked distressed.

"Yes, your sister Xi'er is a coward who can't withstand the temptation, and she has taken pity on my kidney six! Yang Xi, now is the time for you to repent and accept the righteous judgment! ”

Concubine Hua held the "Bible" high and held an Oxford dictionary to her chest, when a gust of wind with the fragrance of osmanthus wafted in from the window, blowing the light gauze pajamas on her body and constantly fluttering, with an inexplicable sacredness.

"Yang Xi, tell me honestly, when did you start to waver, and who is the person who tempted you?"

"Say it quickly, be lenient in confession, and strict in resisting!"

Shen Yu took out a stainless steel cup for brushing her teeth from her basin, and the toothbrush struck it with a "bang", and suddenly made a gong-like sound.

"Hehe, hard mouth? If you don't confess, look at the family law and serve! Hua Fei smiled and took out a fitness stick from under the bed, and slapped it the bed board, making a shocking sound.

"I'm guilty, I'll confess ......"

Yang Xi saw that the bed board was slammed, if this fell on his body, wouldn't he immediately open the flesh? Seeing that the situation was not good, she quickly raised her hand and surrendered.