Chapter 27

Zhang Yuan observed the other party's expression. If the other party is the kind of person who "Lao Tzu is awesome and invincible in the world", then it's OK to echo a few words at will.

Anyway, there is no deep friendship. There is no need to quarrel with each other.

But if the other party really wants to ask for advice, it's also good to communicate with each other.

"There's nothing to mind. Just say it!" Ye Kaifu hurried.

Zhang Yuan continued: "... This whole function should deal with the change of glove pressure? That's the SDK interface of the leather glove. "

"Yes!" Ye Kaifu jumped in his heart. Unexpectedly, the boy really understood.

"Because the amount of data generated by the whole glove is too large, this algorithm will selectively discard most of the data, and more than 70% of the data will be discarded."

"Yes."

Ye Kaifu nodded again.

Zhang Yuan continued: "I don't think all these redundant data should be discarded. One hand, together with the arm, has 22 joints. Taking the data of only 22 closed parts really won't make much mistakes. But without the details of other parts, there will be a very rough feeling... "

"I have several ideas to deal with this seemingly useless data."

"The first is to calculate the variance of the data after they are partitioned. The variance of the redundant data will not be very large... As long as it is calculated in this way, we can judge whether it is redundant data. Anyway, it is better than discarding it casually..."

"The second is that after the data is partitioned, we can use a value function to calculate the value of the partitioned data... Assuming that Max [i] [J] here represents the optimal solution from the i-th data to the j-th data, and the dynamic transfer equation is Max [i] [J] = max (max [i] [k] + Max [K + 1] [J] + W (I, J))..."

At first, ye Kaifu was elated and shouted "reasonable".

The back was silent from beginning to end, so that it completely entered a dull state.

Because in the end, he didn't know what Zhang Yuan was talking about

Brother, what max[i][j] are you doing?

But a breath from the strong made him not know how to speak.

As soon as he opened his mouth, he became illiterate.

"... finally, I want to say that although an arm has only 22 joints, it has at least 27 degrees of freedom, because the arm, wrist and fingers can rotate. Without these five degrees of freedom, it will operate like an excavator. You don't seem to have considered this well... "

Ye Kaifu understood this sentence. He also knew this common sense. He thought about it for a long time at that time, but finally he had to give up strategically because it was too difficult.

Once the arm can rotate, the difficulty of modeling and design will inevitably increase exponentially, and he can't handle it at all.

"How do you say it should be corrected?"

Zhang Yuan said, "the calculation of rotation can usually be done with quaternions. Among such books, the better one is quaternion physics, which can be understood with a little basis of complex analysis. "

With that said, he felt his thoughts were becoming clearer and clearer.

It's really good to be a teacher.

"Quaternion..." Ye Kaifu knew this term and was a little convinced.

He thought in his mind: "... If his former teammate was him, maybe he could win the first prize?"

"Mainly, my undergraduate school is not very good, and there are too few talents to compare with me, so that there is a kind of laziness. But now it's different... "

Soon, he began to encourage himself: "work hard, fighting! Only by studying hard, I am sure Ye Kaifu can surpass him! "

He couldn't wait to say, "Zhang Yuan, I'll treat you to supper. I didn't understand much just now. Can you say it again?"

"I still eat now. It's almost 11 o'clock. I'll get fat."

Because he only ate half a bowl of noodles, Zhang Yuan did not feel full and was a little moved in his heart.

"Of course. Nightlife has just begun!"

"Then... All right."

If the blood sugar concentration is too low, the brain will be mentally retarded.

Zhang Yuan comforted himself.

Heart is better than action, and they slipped out of the bedroom again.

It has to be said that university seems to be the most energetic period in human life. Students generally don't sleep before 12 o'clock.

The east gate is still bustling.

Along the way, ye Kaifu kept talking about various mechanical models, as well as the parameters of various chips and the latest space weapons, with an exaggerated and fanatical tone.

"... I like the enterprise developed by Yingguo very much, and the giant rock turtle platform in the United States is also good. Well, China's flying dragon is also good. The authentic sky carrier is loaded with the latest electromagnetic guns. "

"Indeed, these space weapons... Very shocking results."

After barely understanding what he was saying, Zhang Yuan licked his dry lips: "however, the current research speed of these weapons is not fast, is it? The trend of the whole world is cooperation, not confrontation as before, so the research of various weapons has slowed down. "

Ye Kaifu's saliva flew, as if he hadn't talked like this for a long time: "there are aliens, isn't that Dyson ball the driving force! Although it is more than 1000 light-years away from us. "

"What is the driving force of more than 1000 light years? If it's on alpha Centaur, that's the driving force! "

"If we really open the era of big stars, does it mean that everyone can buy private spaceships?"

"... there will be a day. I've already thought about it. My ship is called Queen Elizabeth! I can fly my spaceship to travel in space! "

Seeing ye Kaifu fall into a frenzy and chatter on his own, Zhang Yuan burst out a sentence and interrupted him: "brother, you won't have a girlfriend if you do this!"

"Why?!"

"How do you know?" Ye Kaifu sweated and closed his mouth.

Zhang Yuan looked around secretly and found that the blonde reporter who had been bullied by himself was not there. He was relieved and swaggered in his chair.

"Because you keep talking about Elizabeth in front of me. Through this noun, I judge that you have no girlfriend... "

"Isn't that a lovely name?"

Zhang Yuan felt a little funny, "yes, very cute! But girls shouldn't like it. "

"Together!"

"Together!"

"Together!"

Suddenly, the next table became noisy. The group drank a lot of wine, and a couple even kissed together in the uproar.

It's no big deal. In this age, this behavior is very normal.

In the face of this dog abuse, Zhang Yuan glanced at it and was too lazy to look at it.

Ye Kaifu sighed and said with a little envy, "those who are still on campus are basically Xueba, right? It's nice to be young. I really miss college. "

Zhang Yuan said, "most of them should be Xueba, but not all of them. There are also a lot of people who want to hold their thighs and get a prize. "

"Anyway, there is a national award. Whether it's applying for a scholarship or looking for a job, it has more capital."

Being said this, ye Kaifu recalled his experience as a dog licker. He was used by his "ex girlfriend".

Well, it's an "ex girlfriend". In fact, I haven't even held my hand. I just gave a title and the willing took the bait.

How stupid!

He said bitterly: "the most difficult thing in the university is not to watch lovers show their love, learn tyrants show their achievements and tyrants show their money, but to watch lovers show their money, learn tyrants show their love and tyrants show their achievements..."

I really want to have a lovely girl who really likes herself!