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  Sorry for the problem with the previous update. Chapter 91 will be released tonight.

  During World War II, the bomb sight computers used on American aircraft were still mechanical computers. Not only was their calculation speed extremely slow, but they were also driven by gears and were very cumbersome with a large box full of gears. Their functionality was simple and equivalent to calculators of that era, but at the time this was already a very advanced technological achievement.

  The aircraft experiences intense vibrations during flight, and the mechanical computer is driven by gears, so everyone was very worried at first that the aircraft's vibrations would have a bad impact on the mechanical computer's calculation results, resulting in increased calculation errors. However, the final test data surprised people, they found that after the mechanical computer was put on the plane, the accuracy of the calculated results was actually better than those on the ground.

  What is the reason for this?

  Experts found that vibration factors ultimately have no adverse effects on mechanical computers and instead increase the accuracy of computer results.

  The calculation accuracy of mechanical computers is limited and can only calculate integers. For decimal points, it can only be rounded up or down.

  For example, if the result of an operation is 4.4, then after processing it becomes 4. If five consecutive calculations are multiplied together, the correct result should be 4.4 to the fifth power, which is 1649.16224, but the mechanical computer calculates the result as 4 to the fifth power, which is only 1024, a big difference. And these errors accumulate, the error becomes even larger.

  However, due to the presence of vibrations, tiny errors occur when mechanical gears rotate, so what was originally 4.4 may eventually become 4.5 or 5, causing a change in the result. Of course, it is also possible that it will become 4.3, which would be no different from the original result.

  Assuming that due to vibration errors, two results changed to 4.5 and 4.6 respectively, while the others remained unchanged, then the final result is 5*5*4*4*4, which equals 1600. This result is obviously closer to the accurate value than the original calculation result.

  In these machines, by adding some random small errors to eliminate the large errors caused by computer rounding, this trick is called dithering technology by scientists, an "using poison to fight poison" wonderful idea.

  After hearing Lin Hong's explanation, Cook finally understood that Lin Hong's seemingly simple circuit actually used the principle of "dithering technology" to achieve a better filtering effect.

  Next, Lin Hong took the trouble to explain another part of the circuit to Cook again, until he finally nodded and picked up the teacup on the dinner table to moisten his throat. He didn't expect that these things he thought were easy to understand would be something Cook couldn't figure out no matter what.

  After listening to Lin Hong's explanation, Cook sat there in a daze, imagining what kind of result would be produced by combining these circuits, sometimes suddenly enlightened and sometimes shaking his head in denial, as if he had fallen into a demonic state.

  After a long time, he gradually began to understand, and his mouth kept spitting out words like "impossible", "unbelievable", "genius" ...

  This design has already far exceeded his acceptable understanding range.

  Lin Hong is unclear about the technical level of electronic engineers in the world in terms of signal filtering, but Cook is quite familiar with it. As a ham, he naturally cares about these cutting-edge technologies.

  Who would have thought that in China, Cook encountered a genius in the electronics field who solved this problem that had been plaguing the world of ham radio for ages.

  Cook didn't suspect that the design wasn't done by Lin Hong, the explanation just now has explained everything, Lin Hong's understanding of this circuit is effortless, and he can even talk about the source of the design concept, if it wasn't the original designer, it would be impossible to do so.

  Feng Wan had been watching her son and Cook exchange, debate and ask questions with a smile on her face all along. This was her son, who could make Cook so flustered. At this moment, she only felt the strong sense of pride as a mother.

  Xu Wenjing looked at Lin Hong with a surprised face, unexpectedly his knowledge of wireless telegraphy was so profound, seemingly even more impressive than Mr. Cook's, really can't judge a person by appearance, and he's even younger than himself?

  Xu Wenjing remembered a sentence someone had said, "Men who are serious are the most lovable", and at this moment, these two men in front of her were lovable to the extreme.

  Xu Wenjing saw that after Lin Hong drew a circuit diagram and handed it to Cook, Cook's face immediately changed color like a chameleon, constantly changing from initial pride to doubt, strangeness, surprise, shock, and incredulity...

  "My God! This... this is an incredible design, it's unbelievable!" Cook stood up with the paper in his hands, as if he was holding a treasure, "Stone, can this circuit really work?"

  Cook saw the cleverness of it but still didn't have a good feel for whether this circuit would really work.

  He looked at Lin Hong with an expectant face, afraid that Lin Hong would shake his head and make a negative gesture.

  "Of course," Lin Hongxiao said with a smile. "I've already made it myself, and the effect is very good."

  "What? There's a finished product?" Cook exclaimed, stepping forward and pulling Lin Hong's hand, "Where is it? Can I take a look?"

  Lin Hong was taken aback, he didn't expect Cook to be so excited.

  "Uh... I didn't bring it with me at home."

  Kuk was getting impatient, but there was nothing he could do, as the thing wasn't on Lin Hong's body.

  He adjusted his emotions and said to everyone: "I'm extremely sorry, it was really rude of me, I just got too excited."

  "We can understand the mood, don't mind." Feng Wan nodded in understanding.

  "Hey, this is great news." Cook sat back in his seat, picking up the circuit diagram again to study it. "Stone, you know, this is a truly fantastic invention. Once we get the product out, it's going to be a godsend for the ham operators!"

  Cook was excited again at this moment.

  "By the way, Stone, has this product applied for a patent?"

  "What's patent? What thing?" Lin Hongwan didn't understand.

  Feng Wan also caught on at this moment. She first explained the concept of patents to Lin Hong, then asked:

  "Mr. Cook, is this something that can be patented?"

  "Why not?" Cook was extremely surprised. "In the US, even creativity can be patented. Stone, it seems that this link has been ignored. I suggest applying for a patent immediately and putting this product on the market as soon as possible. I think all the hams in the world will come to buy this product. Don't you know that all hams have been looking for something like this? It's so simple, it's beautiful!"

  Cook looked at the drawings in his hand and praised again.

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