ps: Something went wrong with the previous update, sorry. Chapter 91 will be released tonight.

During World War II, the bomb delivery calculation device on American planes still used mechanical computers, not only the calculation speed was very slow, but also driven by gears, a large box full of gears is very cumbersome, the function is simple and very simple, only equivalent to the calculator of this period, but at that time this was already a very advanced scientific and technological achievement.

The aircraft will vibrate violently when flying, and the mechanical computer is driven by gears, so everyone is very worried that the vibration of the aircraft will eventually have a bad impact on the calculation results of the mechanical computer, resulting in an increase in the error of the calculation results. However, the final test data surprised people, and they found that after the mechanical computer put the airplane, the accuracy of the calculation was actually better than that on the ground.

What is the reason for this?

After research, the experts finally found that the original vibration factor not only does not have a bad effect on the mechanical computer, but will increase the accuracy of the computer results.

Mechanical computers have limited accuracy and can only calculate integers, and can only round decimal points.

For example, if the result of an operation is 4.4, then the result is 4 after processing. Multiply the results of five consecutive calculations, then the correct result should be 4.4 to the fifth power 1649.16224, but the result of the mechanical computer calculation is 4 to the fifth power, only 1024, the difference is very large, and the more these errors are superimposed, the greater the error.

However, due to the existence of vibration, there is a slight error in the operation of the mechanical gear, and the result of 4.4 may eventually become 4.5 or 5, so that the result changes. Of course, it is also possible to become 4.3, which is no different from the original result.

Suppose that due to the vibration error, there are two results that become 4.5 and 4.6 respectively, and the others remain unchanged, then the final result is 5*5*4*4*4, which is equal to 1600. This result is obviously closer to the exact value than the original calculation.

In these machines, by adding some small errors of random shaking, the large errors when the computer is rounded off, this trick is called jitter technology by scientists, and it is a brilliant idea to "fight poison with poison".

After hearing Lin Hong's explanation, Cook realized that Lin Hong's seemingly simple circuit also used the principle of "jitter technology" to obtain a better filtering effect.

Next, Lin Hong took the trouble to explain the other part of the circuit to Cook, until he finally nodded, and then took a sip of tea from the teacup on the table to moisten his throat. He didn't expect these things that he thought would be so easy to figure out, and Cook couldn't figure it out.

After listening to Lin Hong's explanation, Cook sat there stunned, imagining in his mind what kind of results would be produced by such a combination of these circuits, and suddenly shook his head and denied it for a while, as if he had entered a magic barrier.

After a long time, he began to understand a little, and kept saying "impossible", "unbelievable", "genius", ...... and other words.

The design was completely beyond his acceptable understanding.

Lin Hong didn't know the technical level of electronic engineers in the world in terms of signal filtering, but Cook knew quite well, and as a ham, he naturally cared very much about these cutting-edge technologies.

It's just that Cook never expected that he would meet a genius in the field of electronics in China, and in one fell swoop solved this problem that is a great headache for hams all over the world.

Cook did not suspect that this design was not completed by Lin Hong, the explanation just now has explained everything, Lin Hong's understanding of this circuit is at his fingertips, and he can also tell the source of the design concept, if it is not the original designer, it is impossible to do this.

Feng Wan has always watched her son communicate, argue and answer questions with Cook with a smile on her face, this is her son, who can make Cook so out of shape, at this moment she only feels a strong sense of pride as a mother.

And Xu Wenjing looked at Lin Hong with a surprised face, he didn't expect his radio knowledge to be so profound, it seems that he is much more powerful than Mr. Cook, he is really unseemly, his age is younger than himself, right?

Xu Wenjing remembered the sentence I don't know who said, "Serious men are the cutest", and at this moment, the two people in front of him are very cute.

Xu Wenjing saw that when Lin Hong drew a circuit diagram and handed it to Cook, Cook's face immediately changed like a chameleon, constantly changing colors, from the beginning of the pride, gradually began to change into doubt, strange, surprised, shocked, and unbelievable......

"God! This...... It's a brilliant design, it's incredible! Cook stood up with the piece of paper in his hands in his hands, as if looking at a treasure, "Stone, can this circuit really work?" ”

Cook saw the trick, but wasn't sure if the circuit would actually work.

He looked at Lin Hong expectantly, for fear that Lin Hong would shake his head and make a negative look.

Lin Hong smiled: "Of course you can." I've made it myself and it works really well. ”

"What? And the finished product? Cook was excited, he stepped forward and took Lin Hong's hand and said, "Where?" Can you show me? ”

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

"Uh...... At home, I didn't bring it with me. ”

Although Cook was already a little impatient, there was no way, the thing was not on Lin Hong.

He adjusted his emotions and said to everyone: "I'm very sorry, it's rude, I'm so excited." ”

"We can understand your feelings, don't care." Feng Wan nodded understandingly.

"Hey, that's great news." Cook sat back in his seat, picked up the circuit diagram in his hand and looked at it again, "Stone, you know what, this is a very great invention, once the product is made, it is simply a blessing for ham!" ”

Cook was excited again.

"By the way, Stone, have you patented this product?"

"Patents? What is it? Lin Hong didn't understand it at all.

Feng Wan also heard the name call at this moment, she first explained the concept of patent to Lin Hong, and then asked:

"Mr. Cook, are you sure this can be patented?"

"Why not?" Cook was surprised, "In the United States, even ideas can be patented. Stone, it seems that you have neglected this link, I suggest you apply for a patent immediately, and then let this product be marketed as soon as possible, I think hams all over the world will come to buy your product, don't you know that all hams have been looking for such a thing? It's so simple, it's so beautiful! ”

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

Seek demons