Following the address on the text message, Zhou Xing rushed to a community called Weixiu Garden at the west gate of Peking University. It was an old garden built in the Qing Dynasty, surrounded by mountains and rivers, with ancient ginkgo trees and beautiful scenery.
Zhou Xing bought a basket of fruits from a fruit shop in the community, and then searched according to the picture and found Professor Fang's residence, a private courtyard.
"Knock knock..." Zhou Xing reached out and knocked on the closed door.
"Hello, is Professor Fang at home?" Zhou Xing asked loudly:
"You're here, wait a moment." A calm voice came from inside the room:
Soon, a burst of unhurried footsteps came from far and near, and with a "crunch", the door opened, and an old man with mixed black and white hair came into Zhou Xing's eyes. He wears glasses, has a thin and tall figure, a ruddy complexion, and a pair of experienced eyes with a suspicious look.
The old man half-opened the door and looked Zhou Xing up and down: "Who are you, young man? What do you want from me?"
"Professor Fang, hello, my name is Zhou Xing. I am a student of Class 1 of the Intellectual Science Department. I am entrusted by Professor Chen to come to greet you!" Zhou Xing introduced himself:
"Well, I know you. I had a phone call with Professor Chen just now. Come in!" Professor Fang opened all the doors and made way to invite Zhou Xing:
"Thank you, Professor Fang!" Zhou Xing nodded happily and stepped into Professor Fang's home.
When you walk into the room, you will be greeted by the aroma of books. The lacquered wooden floors, classic wooden furniture, and landscape paintings hanging on the walls are full of nostalgic and classic atmosphere.
"Take a seat, Class 1 of the Intellectual Science Department. Are you a freshman in this class?" Professor Fang invited Zhou Xing to take a seat and asked:
"Yes, Professor, I happen to be your student!" Zhou Xing put the fruit basket on the table, sat on the mahogany chair, nodded and said:
He and Chen Jianbin were just acquaintances, not a deep friendship. Zhou Xing must have something else to ask for when he came to visit. Professor Fang asked inquiringly: "Well! What's the matter? Classes start tomorrow."
"Professor, I have some academic questions that I would like to ask you. I can't wait until tomorrow. Are you free?" Zhou Xing looked at Professor Fang with an awe-inspiring gaze:
Professor Fang was stunned for a moment and said strangely: "Academic problem? Haven't my classes been started yet?"
"Professor, I am more interested in this major, so I studied some on my own in advance and encountered several problems, so I came here to ask you for advice!" Zhou Xing said embarrassedly:
Hearing this, Professor Fang was speechless for a while, not knowing what to say.
At this moment, Zhou Xing gave the impression that he was a brash boy who was eager to learn. In order to ask questions about his studies, he actually sent Professor Chen Jianbin to intercede. Professor Fang thought that Zhou Xing had some trouble and wanted his help!
Isn’t it the teacher’s job to help students solve their doubts
"Looking at Professor Chen's face, I have to take the time to answer you even if I don't have time! If you have any questions, just ask!" Professor Fang smiled happily:
"Thank you, Professor. I encountered a problem when I was learning the multi-objective Pareto optimal solution algorithm. How to set the boundary between the fuzzy value and the optimal value and accurately determine the goal of the optimal calculation?" Zhou Xing asked eagerly:
Hearing this, Professor Fang frowned and looked at Zhou Xing with a strange look.
"Multi-objective optimization calculation means that there are two or more objectives under constraint conditions, and these calculation objectives are contradictory and cannot be solved simultaneously. That is to say, calculating one objective is often at the expense of other objectives. The cost of calculating the value is to set the peak value of the conflict in advance..." Professor Fang thought for a while and replied to Zhou Xing:
While Professor Fang was answering, he paid close attention to Zhou Xing. When he saw a look of surprise on his face, his doubts became more serious. The question asked by Zhou Xing involved a relatively in-depth multi-objective algorithm in the field of intelligence and was not suitable for beginners. scope involved.
"Thank you, Professor. I understand this question. Let's set the conflict value first and then define the optimization." Zhou Xing nodded happily, thanked Professor Fang gratefully, and then continued to ask: "Professor, I have another question. The problem is an experiment about fuzzy strategy calculation. The experimental steps are as follows. Design a chip to control the water inlet valve S1 and outlet valve S2, and automatically control the water level to 0... The control quantity U is the output of the fuzzy control, U From the deviation matrix e and the fuzzy relationship matrix R... the experiment failed, please tell me that there is a problem in that step."
Listening to Zhou Xing's endless description of difficult problems, Professor Fang couldn't help but sit up straight and listen. The problem Zhou Xing described was about fuzzy control algorithms, which also involved very in-depth knowledge points in the field of intelligence.
After listening to the question, Professor Fang frowned and thought for a while, and replied: "In this experimental case, the customized observation and control quantities are correct, the five fuzzy set values of the input and output quantities are correct, and the customized fuzzy rule settings are biased. , did you combine the neural network to learn fuzzy rules? You did not do a good job in the de-fuzzy processing and settlement of the control volume... so it led to data errors."
"So that's it, I understand!" Zhou Xing looked happy, looked at Professor Fang gratefully, and continued to ask: "Professor, I have another question, it is still an experiment..."
Listening to Zhou Xing describing the experimental steps, Professor Fang looked solemn, frowned and thought before answering: "This experiment involves a simulated annealing algorithm, which introduces him to an acceptance probability P..."
Listening to Professor Fang's answer, Zhou Xing suddenly became enlightened, thanked him gratefully, and then continued to ask a question.
“…”
Questions and answers continued for nearly two hours without realizing it.
There was a "click" sound, and a door opened suddenly in the house. I saw a woman in her fifties walking out of the bedroom in the house. She looked at an old man and a young man in amazement talking endlessly in the hall. .
The middle-aged woman watched for a long time, but found that they were neglecting her because of their conversation.
"Old Fang, a student has come to sit down! Who is this?" Seeing this, the middle-aged woman helplessly interrupted their conversation and said:
"Well, this is my student - Zhou Xing, and this is your teacher - Chen Yi." Professor Fang stopped the topic, looked at his wife and introduced Zhou Xing with a smile:
"Hello, Master!" Zhou Xing quickly stood up from his chair and greeted:
"Yeah, good boy, let's have dinner at home tonight! Old Fang, I'm going to buy groceries. I won't disturb your chat!" Chen Yichong smiled at Zhou Xing and said wittily:
"No, Master, I want...!" Upon hearing this, Zhou Xing waved his hand and refused:
"What else do you want? We'll eat here tonight. We can continue the question! Or are you leaving soon?" Professor Fang interrupted Zhou Xing's unspoken words and asked with a dark face:
"Um, um, you're welcome! I still have a lot of questions!" Zhou Xing looked at Professor Fang's old face and blushed slightly, and said embarrassedly:
Hearing this, Professor Fang showed an expression that was about to cry without tears, and smiled bitterly.