Chapter 270 I do have some new ideas
At 4 o'clock in the afternoon, the sun was still hot and there were not many people on the road. Song Yao and Ding Jiahui also entered the shopping mall next to the milk tea shop.
"Resurrected on the spot."
Enjoying the coolness that hit her face, Ding Jiahui took a long breath and asked curiously: "Is Xu Qingzhou so busy over there?"
"Well, he said that the Xia Guo group and the American group are competing for the right to speak in the experiment, and the entire group is busy doing calculations day and night."
At this time, Ding Jiahui was even more confused, "Oh~ I am still complacent about getting the scholarship, while my friends around me are already bringing glory to the country."
Song Yao is already used to Xu Qingzhou's abnormality.
Well, it was perverted, whether it was in academic studies or in daily life. Thinking of this, she couldn't help but look at her feet.
I miss the tingling feeling a bit, he won't be back for another month.
"Yao Yao, Yaoyao?"
"Huh?"
"What are you thinking about, being so involved?"
Song Yao's ears felt a little hot, she looked away and said, "I was thinking about what I wanted to say just now?"
After being reminded by Song Yao, Ding Jiahui also remembered that she had something to share and said, "I want to say that another shocking incident happened in the circle of high school classmates."
Song Yao was actually not interested in these gossips. Seeing Ding Jiahui's mysterious look, she still asked cooperatively: "What kind of melon."
Ding Jiahui said leisurely: "You and Xu Qingzhou will get married after graduation."
Song Yao stopped and looked at her with raised eyebrows. This seemed to be something everyone knew.
"Okay, it doesn't seem to be anything new. However, I am still very happy that I succeeded in using CP."
Ding Jiahui seemed to have turned into the talkative person she was in high school, talking non-stop.
"It was just a rumor before, and didn't you two refute it at the class reunion? Now you have added a lot of details. For example, you and Xu Qingzhou bought a wedding house in Kyoto, and you will go get the certificate when you are old enough."
"Two more years."
"Ah, you really thought about it."
"Everyone seems to have changed this summer. Look at the first summer vacation and the winter vacation. There were parties everywhere, sometimes with junior high school classmates, sometimes with high school classmates. It was so lively."
"Now, the only phone call I receive is from a salesperson."
On the 15th, at 8 a.m. Swiss time, the Xia Guo Group opened its fourth meeting. After five days of hard work, a draft of the analysis of the two-photon channel appeared in everyone's hands.
After Academician Yang sat down, he said directly: "Everyone has finished reading the draft. Time is tight. Let's each supplement the content of the draft. Professor Cao, you can start first."
"I went over the plan carefully last night, and I think that in addition to the existing method on page 18, we can add a matrix transformation to correct the nonlinear response of the detector or the problem of uneven spatial resolution."
As he spoke, Cao Weijie walked to the whiteboard and wrote down formulas and steps.
After 20 minutes, Cao Weijie finished speaking and moved on to the next person.
The professor named "Gao" shook his head: "I don't have any ideas here. This is the best plan we can make in a short time."
Chen Peipei, the second-to-last girl in the Xia Guo group, shook her head: "I have nothing to add."
Even her own boss had no idea what she could add.
But
Chen Peipei secretly glanced at the face opposite her that was younger than her. This junior brother should be similar to herself? Next, only a professor named Qiu Peng added.
Soon it was Wang Qiming's turn opposite Xu Qingzhou.
"Use an optimization algorithm, preferring the gradient descent method, to minimize the $\chi^2$ function on page 45 of the solution to find the optimal parameter values $\mu, \sigma, A$ and $\ beta$.”
Wang Qiming opened his notebook and said slowly.
Academician Yang turned to page 45, thought for a while, nodded, and said solemnly: "This plan is feasible, so I will leave it to Professor Wang."
"No problem." Wang Qiming smiled and nodded.
When Wang Qiming said that, Xu Qingzhou also found the \chi^2$ function. This function belongs to the category of statistics. It is a form of statistical inference and can assist in describing the signal shape of the Higgs particle decaying into two-photon. tool.
Whether it should be said or not, Wang Qiming still has some strength.
Xu Qingzhou's eyes darkened and his thoughts were flying. He was not concerned about the opponent's strength, but was thinking about another thing - how to correct the underlying problem.
He is not good at particle physics, but he is proficient in quantum mechanics.
The wave-particle duality theory in quantum mechanics points out that particles have both wave and particle properties. In the study of the two-photon tract of the Higgs particle, this dual nature of particles has been fully reflected.
From the perspective of quantum mechanics, the interference effect between signal and background is actually a manifestation of quantum interference.
So.
"Team Leader Shen." Academician Yang looked at Shen Yuanjie.
Shen Yuanjie also shook his head. He was not very satisfied with the current analysis results, but there was no better way.
"The same applies to me. Although this model can avoid background contribution and is better than last year's German experimental group, the efficiency is not high. Moreover, it requires multiple iterations. According to the current situation, it will take at least 7 days."< br>
Zhang Changqing sighed and said: "Unfortunately, what we are short of now is time."
Xu Qingzhou was still thinking about the problem just now, and he already had an idea.
To overcome this problem, is it possible to accurately describe and predict this interference phenomenon by constructing a model containing interference terms and using the superposition principle and probability amplitude addition rule of quantum mechanics.
Not bad, it should be feasible.
Academician Yang looked at Xu Qingzhou and saw that he frowned and didn't know what he was thinking. He was about to interrupt. Although he felt that this young man probably had nothing to say, he still had to go through the process.
However, before he could speak, Wang Qiming had already spoken: "Xiao Xu, it's your turn to speak."
Young people, you need to learn a lesson and be more serious during meetings.
Wang Qiming snorted coldly in his heart.
Xu Qingzhou came to his senses.
Seeing this, Wang Qiming squinted his eyes and continued: "Although Xiao Xu is young, he is very accomplished in mathematics. He has set a new age record for participants in the Xia Guo group. Judging from your appearance, you must have some good ideas. Come on, say it and let everyone listen.”
It's a foreign country, and at the same time, the Xia people are all in the same research group. They can't do anything excessive, otherwise their reputation will be ugly, but it's okay to be disgusted with the language.
Zhang Changqing helped Xu Qingzhou speak, "Junior brother is probably tired. Junior brother is indispensable for being able to make this big model in the plan."
Academician Yang frowned, but didn't say anything, or couldn't say anything. He could only turn his head and look at Xu Qingzhou.
Oops, praise and kill.
Xu Qingzhou immediately understood Wang Qiming's plan, shook his head in his heart, and laughed softly, "I do have some new ideas here."
As he spoke, he stood up and wrote a row of formulas in the lower right corner of the third whiteboard: [B(x;\beta_i,\lambda_j)=P(x;\beta_i)+E(x;\lambda_j
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(End of chapter)