According to the address on the text message, Zhou Xing rushed to a community called Weixiu Garden at the West Gate of Peking University, which was built in the old garden left over from the Qing Dynasty, surrounded by mountains and rivers, ancient ginkgo trees, and beautiful scenery. Pen ~ fun ~ pavilion www.biquge.info

Zhou Xing bought a basket of fruits in a fruit store in the community, and then, according to the map, he found Professor Fang's residence, a separate courtyard.

"Knock knock.... Zhou Xing stretched out his hand and knocked on the closed door,

"Hello, is Professor Fang at home?" Zhou Xing asked loudly.

"Yes, wait a minute. A calm voice came from inside the room:

Soon, a burst of unhurried footsteps came from far and near, "creak", the door opened, and an old man whose hair was changing to silver met Zhou Xing's eyes, he was wearing a pair of black-framed glasses, thin and tall, ruddy complexion, and a pair of eyes full of experience with a suspicious gaze.

The old man opened the door ajar and looked Zhou Xing up and down: "Young man, who are you?

"Hello Professor Fang, my name is Zhou Xing, a student in the first class of the Department of Intellectual Science, entrusted by Professor Chen, I came 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 Xingdao:

"Thank you, Professor Fang!" Zhou Xing nodded happily and stepped into Professor Fang's house.

Walking into the room, a smell of books came to the face, the red wooden floor, the classical wooden furniture, and the landscape paintings hanging on the wall were full of nostalgic and classical atmosphere.

"Sit down, the first class of the Department of Intellectual Science, are you a freshman in this class?" Professor Fang invited Zhou Xing to take a seat and asked:

"Yes, Professor, it just so happens that I am your student!" Zhou Xing put the fruit basket on the table, sat down on the mahogany chair, and nodded:

He and Chen Jianbin only nodded at each other, and there was no deep friendship, Zhou Xing must have asked for something else when he came to visit, Professor Fang asked inquiringly: "Well, is there something wrong?" Classes will start tomorrow. ”

"Professor, I have some academic questions I want to ask you, I can't wait for tomorrow, are you free?" Zhou Xing looked at Professor Fang with a red look:

Professor Fang was stunned for a moment, and said strangely, "Isn't there a problem with my studies?"

"Professor, I'm more interested in this major, so I studied on my own in advance and encountered a few problems, so I specially came to ask you for advice!" Zhou Xing said embarrassedly:

Hearing this, Professor Fang was dumbfounded for a while, he didn't know what to say, at this moment Zhou Xing gave him the feeling that he was a somewhat studious reckless boy, in order to ask academic questions, he actually sent Professor Chen Jianbin to intercede, he thought that Zhou Xing had something to do with him to help! Isn't it the teacher's job to help students solve their doubts!

"Looking at Professor Chen's face, I don't have time to answer you! 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 urgently:

Hearing this, Professor Fang frowned, looking at Zhou Xing's gaze a little strange.

"Multi-objective optimization calculation refers to the fact that there are two or more objectives under constraints, and there are contradictions between these calculation objectives, which cannot be solved at the same time, that is to say, the calculation of one goal is often at the expense of the calculated value of other objectives, and the peak of contradiction and conflict should be set in advance,......。 Professor Fang thought for a while and replied to Zhou Xingdao:

While answering, Professor Fang paid close attention to Zhou Xing, and saw that he showed a sudden look, and the doubts in his heart became heavier.

"Thank you, professor, I understand this problem, first set the contradiction value, and then define the optimization. Zhou Xing nodded excitedly, thanked Professor Fang gratefully, and then continued to ask: "Professor, I still have a question, which is an experimental problem about fuzzy strategy calculation, the experimental procedure is like this, a chip in plain clothes controls the water inlet valve S1 and the water outlet valve S2, and automatically controls the water level to 0 value,... , the control quantity U is the output of the fuzzy control, and U is composed of the deviation matrix e and the fuzzy relationship matrix R,... The experiment failed, and the professor sees that step is wrong. ”

Listening to Zhou Xing's endless talk about the problem, Professor Fang couldn't help but sit up straight and listen, the problem described by Zhou Xing is about fuzzy control algorithms, which also involves 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 measurement and control quantity are correct, the five fuzzy sets of input and output quantities are correct, and the custom fuzzy rules are set off,... , which is why it will cause data errors. ”

"So that's the case, I understand!" Zhou Xing's face was overjoyed, he looked at Professor Fang gratefully, and continued to ask: "Professor, I still have a question, or is it an experiment,...。 ”

Listening to Zhou Xing's description of the experimental steps, Professor Fang's face was solemn, and he 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 Xingmao paused, thanked him gratefully, and then continued to ask for advice.

“……。 ”

One question and one answer, unconsciously lasted for nearly two hours.

With a "click", there was a sudden sound of the door opening in the house, and a woman about fifty years old came out of the bedroom in the house, looking at the old and the young in the hall with a surprised face.

The middle-aged woman watched for a long time, but found that they had neglected themselves by patronizing the conversation.

"Old Fang, there are students to sit down! who is this?" the middle-aged woman reluctantly interrupted their conversation:

"Well, this is my student-Zhou Xing, and this is your teacher-wife-Chen Yi. Professor Fang stopped the topic, looked at his wife and introduced Zhou Xing with a smile:

"Hello, Master!" Zhou Xing hurriedly got up from his chair and greeted:

"Well, good boy, eat at home at night! Old Fang, I'm going to buy vegetables, don't disturb your chat!" Chen Yichong Zhou Xing smiled slightly, and said wittily:

"No need for my wife, I still want to...!" When Zhou Xing heard this, he hurriedly waved his hand and refused:

"What else do you want, we will eat here in the evening, we can continue the question just now!, or are you leaving soon?" Professor Fang interrupted Zhou Xing's unspoken words, and asked with a dark face:

"That, that, then I'm welcome! I still have a lot of questions!" Zhou Xing looked at Professor Fang licking his face and said embarrassedly:

Hearing this, Professor Fang showed an expression of wanting to cry without tears, and smiled bitterly.