Lin Zhenhua spoke to Hu Yang for two hours, and after speaking, the two looked at each other with incredible expressions.

Hu Yang felt incredible because he had only heard about finite element analysis, and today he really knows the specific algorithm. This new analytical theory made him feel like he had entered a new world.

What Lin Zhenhua felt incredible was that he found that Populus euphratica's mathematical skills were amazingly good, and people couldn't believe that Populus euphratica's academic qualifications were just high school graduates. Many very complex calculation ideas are as natural as four operations in Hu Yang's view. During the whole process of Lin Zhenhua's narration, Hu Yang almost did not hesitate at all, as if it was not Lin Zhenhua teaching him a new method, but he was listening to Lin Zhenhua's graduation defense. Lin Zhenhua once again suspected that Hu Yang might also be a traveler.

"Master Hu, have you learned everything I said?" Lin Zhenhua asked cautiously.

Hu Yang shook his head: "No, it's the first time I've heard you say today, and it's really beneficial." ”

"I don't think you have any traces of learning at all."

"Really?" Hu Yang asked rhetorically, he thought for a while, and replied with a smile: "Maybe it's because I have thought of these methods in the past, but I haven't formed a systematic idea." Listening to you say this today, I strung together all my sporadic thoughts. This finite element analysis method is so useful that I think it can play a very big role in many fields. ”

"That's right." Lin Zhenhua said that for later generations of mechanical students, finite element analysis is almost like a worker's vernier caliper, which is an indispensable tool. However, in later generations, finite element analysis was achieved with the help of computers, and I have never heard of manual calculation of finite elements.

"Master Hu, the analysis we have to do is roughly like this, think about it, can we calculate the operation by hand?" Lin Zhenhua said.

Hu Yang pondered for a moment and replied, "No problem, I am sure to figure it out." In this way, Mr. Lin, this problem is my homework, I am responsible for calculating it and handing it over to you, and you can also test whether I really master the method of finite element analysis by the way. ”

"Okay." Lin Zhenhua nodded and agreed, he didn't know how Hu Yang planned to do calculus, anyway, he didn't plan to do it, as a young man in the 21st century, he had long lost the ability to do hand calculations.

Hu Yang received the task from Lin Zhenhua, went to the warehouse first, asked for two blank pieces of paper, and asked the custodian Zheng Mingxia to record it in the account of the submerged arc welding joint research team. Zheng Mingxia thought that Populus euphratica was a fake public benefit, and these papers might be scratch paper prepared for her children. Only Lin Zhenhua knew that these two knives of paper were intended to be used by Hu Yang for finite element analysis, and if he really wanted to calculate several curves, maybe the two knives of paper would not be enough.

Lin Zhenhua was too lazy to worry about Populus euphratica, he rode a bicycle, carried a bag of oranges and two catties of sugar, and came to Lujia Lane in Fenghua County to visit Lan Wufeng's home.

"Auntie, is Fengzi at home?" Lin Zhenhua stepped into the No. 16 courtyard and asked Aunt Lan who was washing clothes in the yard. Before that, Lin Zhenhua had been here a few times, and he was already very familiar with Aunt Lan.

"Yo, it's Xiaohua here." Aunt Lan shook off the soap bubbles on her hands, stood up with difficulty, and greeted Lin Zhenhua. Lin Zhenhua has heard Lan Wufeng say that Aunt Lan has been working as a temporary worker in the canteen of a factory for many years, soaking in water every day, suffering from severe arthritis, and now she is almost incapacitated. It was for this reason that Lan Wufeng ran back from Yunnan's Zhiqing Point.

Lin Zhenhua hugged Aunt Lan, followed her into the house, and then handed her the things she was carrying: "Auntie, you can try a little orange and sugar from our factory." ”

"Oh, Xiaohua, you brought something again, how can we pay it back." Aunt Lan said gratefully that Lin Zhenhua had to bring something with him every time he came back, which had become a common practice. The oranges I brought this time are nothing, but two catties of sugar are a very thick gift, you know, sugar is a commodity supplied by ticket, and a person only supplies four taels a month. In those days, it was a luxury for children to drink a glass of white sugar water.

Lin Zhenhua put down his things, then stopped Aunt Lan, who was about to pour water for him, lifted the hot water bottle and poured himself a glass of water, and asked with a smile: "Auntie, what has Fengzi been doing for a while?" ”

Aunt Lan said: "After you made a honeycomb coal mold for Fengzi last time, he now rides a bicycle outside every day, and he will help others make honeycomb coal to see which one wants to make honeycomb coal." When it's good, you can earn more than a dollar a day. ”

"This Fengzi is really willing to put in the effort." Lin Zhenhua said with a smile.

Fenghua County is one of the few coal-producing counties in the south, and there are many coal burners in the county. In the past, everyone used to make coal into briquettes, but in recent years, some families have begun to switch to honeycomb coal, because the stove fire of honeycomb coal is relatively prosperous, and it is easier to change coal.

There is no factory specializing in making honeycomb coal in the county, and the honeycomb coal used by each household is made from its own molds. The mold of honeycomb coal is a sleeve with a long handle, and there are seven cylinders in the sleeve, which are used to generate the seven pores of honeycomb coal. When making honeycomb coal, it is necessary to mix pulverized coal and clay in a certain proportion, knead it evenly, and then press it into the mold, press it tightly, and then push the sleeve rod on the mold to push out the formed honeycomb coal and dry it on the ground.

This kind of mold for making honeycomb coal is not available in the market, in fact, even if it is available in the market, no family will be willing to spend money to buy it. The workers of Hanhua Machinery Factory have a unique advantage in this regard, they can find some waste materials in the factory to make molds. Residents in the county town did not have such conditions, and sometimes they had to borrow molds from factory workers to use them.

Lan Wufeng decided not to be a thief, but he couldn't find any good employment channels for a while. Lin Zhenhua gave him an idea, first helped him make a set of honeycomb coal molds, and then asked him to take the molds to help people make honeycomb coal in the county. Some residents in the county town do not have the labor force to do this kind of work at home, and they also lack the tools, so they are willing to pay some money to hire someone to help. Lan Wufeng started by helping people and coal, until the honeycomb coal was done, and only charged a processing fee of two cents for a honeycomb coal, which is still an acceptable price for many families. Lan Wufeng works hard, and can make hundreds of honeycomb coals in a day, and sometimes he can indeed earn more than a dollar.

"Xiaolin, I really want to thank you. The things that Fengzi used to do, I also know, are all unseemly. Since I met you, Fengzi told me that he also has to support himself and can't do anything like stealing chickens and dogs anymore. Aunt Lan said.

"Fengzi is a very filial person. I always feel that a person with filial piety is definitely not a bad person. As long as he is given a chance, he will definitely be able to make everyone proud of him. Lin Zhenhua said.

"I hope that day will be good." Aunt Lan said.

"Brother Lin, Brother Lin." Just as he was talking about Lan Wufeng, his shout came from the yard, Lin Zhenhua walked out of the door to take a look, only to see Lan Wufeng pushing a bicycle and walking in, as if he had climbed out of the coal pile, only a row of teeth was still white.

"Oh, Fengzi, why did you get covered in ashes again?" Aunt Lan said distressedly.

Lan Wufeng smiled: "It's okay, I'll just take a shower." ”

As he spoke, he didn't feel too cold, so he took off his shorts in the yard until he was left, and then poured cold water from the basin and faucet on his head. It's December now, and although it doesn't turn into ice, it's still cold. Lan Wufeng poured cold water on his body, and faintly saw a wisp of steam rising.

"Fengzi washes like this every day, I'm used to it." Aunt Lan saw that Lin Zhenhua was a little stunned, and explained with a smile.

Lan Wufeng washed a few basins of water and washed his body, Aunt Lan brought him a big towel, he wiped his body and asked Lin Zhenhua: "Brother Lin, why are you free to come over today?" ”

"Xiaohua brought us oranges and sugar, at least two catties of sugar." Aunt Lan said while cleaning up Lan Wufeng's dirty clothes.

"Brother Lin, how dare you let me accept it. Or, you keep the oranges, and you take the sugar back, right? Lan Wufeng said.

Lin Zhenhua said: "Fengzi, you can keep it, it's not a valuable thing." When I went to Ruiping Machinery Factory for training, they gave me more than a dozen catties. We sent a few more catties in the factory, so I thought I'd bring some for you. ”

"Then thank you Brother Lin." Lan Wufeng said, "I owe you so much anyway." Alas, I just don't know when I'll be able to afford it. ”

"Hehe, don't worry, there will be a chance." Lin Zhenhua said, "If you persist for a while, the country's policies will be liberalized soon, and you will have the opportunity to show your skills at that time." ”

"I believe Ringo's words." Lan Wufeng Road.

"Fengzi, you have to remember your Brother Lin's kindness, if you really develop one day, you must not forget Brother Lin, you know? If you dare to forget Brother Lin, I won't let you go first. Aunt Lan advised.

Lan Wufeng smiled at Lin Zhenhua: "Brother Lin, do you think I'm the kind of person who is ungrateful?" ”

Lin Zhenhua said: "What kind and righteous, everyone is a friend, it is a matter of course to take care of each other, if it is a debt, it will be meaningless." If you are prosperous one day, I will be very happy if you can still recognize me as a friend. If you have your own world and have nothing to do with me, I'm still happy. ”

Lan Wufeng said: "I know that Brother Lin doesn't like to hear this kind of thanks, so I won't say it." What will happen in the future, it is useless to say more now. I'll just say, Brother Ringo, you should believe in yourself, you can't be wrong. ”