"Let's get down to business." Liu Ruiyang pointed to the computer screen and asked Huang Ligong to lean over. He looked up at Xu Qianqian and motioned for her to move a chair to sit over. Xu Qianqian nodded, did not move the chair, stood forward beside Liu Ruiyang, and also looked at the computer screen.

Liu Ruiyang tapped a few times on the keyboard, and more than a dozen data table panes were neatly stacked on the screen.

"This is the data transmitted back by the robot in the field, and I will analyze it in detail......"

"Huh......" Xu Qianqian immediately retracted her voice and stopped the words in her mouth.

Liu Ruiyang understands what she wants to say, there are requirements in this bidding, and all related systems and software of the robot cannot leave a backdoor. At the working meeting before coming to India, he gave clear instructions to seal the data transmission interface. Before leaving, he secretly opened the interface and transferred the data to his computer. He hid it from everyone, only Huang Ligong knew. This kind of thing must be known to the fewer people the better, and Xu Qianqian naturally doesn't know either.

As he operated the computer, he explained to her, "We don't steal data. "As required by the tender, after the demonstration, the companies took back their robots. The robot is back in the hand, as long as there is a storage module, the data will naturally return to the hand. Liu Ruiyang has experienced too many experimental accidents and failures in school, and it has long become his breathing instinct to be prepared to protect data and prevent small probability risks. It was a rare time to come to the Indian desert, he needed this data so much, it was essential for the improvement of the product, and he could not accept any risk of data loss. "Of course, after winning the bid, the finished product delivered to them will definitely be closed."

A new data table is displayed.

"Find the anomaly first, extract the abnormal data category, and then build a time series ......" Liu Ruiyang knocked down a few lines of instructions, and a concise chart popped up on the screen, arranging three display areas, each area is a red line and a blue line, close together, but it can be seen that it is not completely overlapped.

"Starting position. Adjust the position. Brush head frequency. Liu Ruiyang pointed to the three areas one by one, "These three indicators are the most basic, and with them, you can build the simplest intelligent cleaning model." It's just that these basic things are all wrong. The blue line is the actual operation data; The red line is recalculated according to our algorithmic model. ”

Huang Ligong snorted, he had already seen the seriousness.

Liu Ruiyang glanced at Xu Qianqian and quickly knocked a few more instructions. "I zoom in on the scale and I can see more problems."

The line graph on the screen is zoomed in, and now the difference between the red and blue lines becomes obvious. At first, the two lines were still fit, but soon they parted ways, and the further back they deviated, the faster they deflected, and the distance suddenly widened significantly.

"The correct arithmetic should be these red lines. I sampled the data of the time period when the problem occurred, and if I calculated and operated correctly according to the algorithm model, nothing would happen. However, there is a big problem with the real-time calculation of the robot, and the estimation error of distance and difficulty is very large, so ......"

"This look is obviously wrong, doesn't our robot have an automatic deviation correction system, I remember?" Xu Qianqian asked.

"The reality that robots see is not the same as the reality that we humans see. Robots look at reality through data, and if the data is wrong, the reality is wrong. There was a problem with the basic calculations, it miscalculated the position of the PV panels, and it also miscalculated its own speed. What we see is that it slams the panel, but to the robot, it moves very slowly, and it cuts through the air. ”

"Hmm...... I understand. However, don't bots also use this algorithm? Why are you right, but the robot isn't? ”

Huang Ligong hurriedly answered, with a slight impatience: "The system will be biased." Your computer will freeze. ”

"It's not that simple." Liu Ruiyang shook his head, still facing Xu Qianqian, "Your question is very good, to the point." If it is applied everywhere, it is often useless at all. It can only be used to comfort people. The key to solving the problem is to find the real anomaly. What makes you different from others is decisive. Industrial production must inevitably have errors, yes. However, errors and errors are not the same. He thought about it and found an example, "I asked you, there is a production line, the yield rate fluctuates around 99.9%, and suddenly you find that at the beginning of January, the yield rate is around 99.5%, and after a few days it returns to 99.9%. Do you comfort yourself and say, oh, the system is going to be wrong, or is it going to be like a pinprick and say, hey, it's kind of weird here, I'm going to have to find out why? ”

Xu Qianqian glanced at Huang Ligong, hesitated, and replied quickly, "I have to find out what the reason is." ”

"Yes, that's the most basic concept in industrial production, random error and systematic error. Don't underestimate it, the most basic things are the most important. Made in a big country, in fact, is to do the most basic things to the best. Germany, Japan, these manufacturing powers, is actually very simple, that is, to do the simplest things to the best, do not casually use random errors to comfort themselves, and make every effort to eliminate systematic errors and reduce them to the extreme. ”

Liu Ruiyang pointed to the shocking gap between the red and blue lines on the screen, "We have to dig deeper, this is not a random error can be explained." ”

Huang Ligong saw that he took a sentence that he sent Xu Qianqian to the platform, which was angry and ridiculous, and Zhengse asked, "Found a systematic error?" ”

Liu Ruiyang nodded and sighed.

"What's the problem?"

"Rounding."