Chapter 136：

Finally, after analysis and verification, a set of correct models was developed.

And the most interesting point of mathematical modeling is that there is no so-called standard answer.

For example, using mathematical modeling to make a folding chair, different people will make folding chairs with different shapes.

Although the shapes are different, you can't say that his mathematical model is wrong as long as it can be used.

However, there is no standard answer, but there are good and bad points.

Someone designed a folding chair that is more comfortable and easier to carry, which shows that his modeling is better.

The same is true for Dai Pingbo's question.

Looking at the questions on the paper, Lin Xian's brain was running fast, and the mathematical knowledge he had learned before kept flashing.

After pondering for a long time, Lin Nao suddenly had an idea.

The essence of this question is actually to study the law of the falling speed of an object over time.

It belongs to the Newtonian mechanics system, and you can try to establish a model with partial differential equations.

Once the model is established, the next step is a series of calculations and verifications.

Thinking of this, Lin Xian couldn't help but evoke a smile, and quickly wrote rows of numbers on the paper with a pen in his hand.

Suppose: T is the echo time, G is the acceleration of gravity and H is the depth of the deep hole.

Solution (1): According to Galileo's law of falling, we know...

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Unconsciously, an hour passed.

Zhuang Tong glanced at the time, stretched his waist and said: "It's late, it's almost time to make dinner."

"There seems to be no more vegetables in the refrigerator?" Nie Qingqing said.

"It's okay, I just went to the supermarket to buy something."

Zhuang Tong jumped out of the hanging basket and said to Lin Xian: "My dear, what do you want to eat tonight?"

However, Lin Xian did not answer, still lowered his head, struggling to write.

"What question is so attentive?"

Nie Qingqing murmured and stepped forward and took a look.

Her eyes were filled with dense numbers and symbols, and line of calculation formulas made her dizzy.

Who can stand this?

Excuse me, goodbye!

Zhuang Tong couldn't help being speechless: "I can't understand it at all, I'm going to cook!"

At this moment, Lin Xian raised his head and smiled: \"I'll do whatever you want."

"Then let's go shopping!" Zhuang Tong smiled.

"Go!"

After that, Lin Xian lowered his head again.

Once he found the inspiration, the next calculation formula seemed to come naturally. This feeling was so cool that he couldn't help but indulge in it.

Sitting on the Beetle, Nie Qingqing put on his seat belt and said: "Lin Xian feels so strange!"

"Why is it weird?" Zhuang Tong asked with a smile.

"It just feels that he is completely different from other rich second generations. I really can't imagine that he actually sat there and did math problems for more than an hour." Nie Qingqing said with emotion.

Zhuang Tong held the steering wheel and looked at her carefully.

Nie Qingqing was a little hairy when she saw it, she couldn't help raising her eyebrows and said, "What's the matter?"

"Hehe, I'm thinking we might really be girlfriends for a lifetime!" Zhuang Tong said with a meaningful smile.

Nie Qingli pretended to be calm and said: \"I...we originally said that we would be best friends for a lifetime!"

"Haha!"

Zhuang Tong laughed and didn't reveal her.

As a woman, how could she not know that when a woman is interested in a man, it means that she is not far from falling in love with each other.

And a man like Lin Xian is like a black hole, and it's normal to attract women.

The two women went to the supermarket to make purchases. After returning home, Lin Xian still lowered his head to do the question.

Upon seeing this, Zhuang Tong gently carried the ingredients into the room, trying not to disturb him.

Seven o'clock in the evening.

Lin Xian raised his head, put down the pen in his hand, and let out a long sigh of relief.

"Finish!"

Looking at the densely packed mathematical models on three or four pages of white paper, Lin Xian felt an unparalleled sense of accomplishment.

According to the requirements of the subject, he established a total of four models, and after verification and analysis, he only needs to import all these mathematical models into the computer, use C++ or MATLAB to find the result of the equation.

To be honest, this question is his current limit. For mathematical modeling, basic mathematics is the key to open the treasure house. The more keys you master, the greater the chance of opening the treasure house.

"Still need to continue learning!" Lin Xian sighed.

At this moment, the system prompt sound in the brain suddenly sounded.

"Ding!"

"Congratulations to the host for solving the problem and triggering the hidden mission: Heart of Champions!

[Champion's Heart]

Task requirements: Participate in the National College Student Mathematical Modeling Contest in the Higher Education Society Cup. Task progress: 0%

Task reward: 27 (The final reward depends on the host's performance in the competition!)

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