The strongest reserve for the doomsday

"Oh, what's the solution?" At

this time, I had already finished eating, although I was still not so full, but I was not far from ten, I couldn't hold another bowl like a rice bucket like a fat man. He asked, setting the bowl aside.

"This kind of walkie-talkie will show the strength of the received signal, and we have 3 walkie-talkies here, so we can use the three-point positioning method to determine the specific location of this person.

Zheng Yan said to us while tinkering with the walkie-talkie.

Three-point positioning, which I have heard of, is also a common way for the base station positioning of our mobile phones. The simple point is that a transmitting signal is received by three receivers, and then the position of the signal transmitting point is calculated according to the strength of the signal received by the three receivers.

Because the distance from each point to the signal transmission point is different, the strength of the three points is also different. Then I can set up three points here in this Lin'an and place my walkie-talkie, the farther away these three walkie-talkies are, the higher the positioning accuracy.

Then after receiving the signal at these three points, record the signal values of these three points, for example:

the signal value of the first point is 50db, the signal value of the second signal point is 40db, and the signal value of the third signal point is 30db.

Then wait until the signal of these three points is collected, come back, mark these three points on a map, and then draw three circles with the signal strength of each point as the radius, and the intersection of these three circles is the signal source.

Since the spatial attenuation of the signal is the cubic relationship of the distance, according to the formula: signal source strength / (distance ^3) = the strength of the received signal, then the radius of these three circles is: radius = (the strength of the signal source / (the strength of the received signal)) to the third power.

To put it bluntly, for every 10 meters of distance, the signal is attenuated by a factor of 1,000. That's an attenuation of 30 dB.

The way is a good

way, but why do we go to great lengths to locate this person?"Haha~ Good way!But this person is also quite interesting, why not shout directly in the walkie-talkie, but use this way to warn us, we are not afraid that we will not understand? Moreover, if it is really to warn us, it means that there is no malice towards us, curiosity kills the cat, and you should not care about him for the time being~

"" Warning is just one of the translations of this signal, and the main meaning of this signal is to call for help, so it may not be a call for help.

Zheng Yan returned.

"Then why don't you speak directly, call help~help~help~help~mayday~mayday~ or something, how direct~"

I said with a smile.

"This~...

Zheng Yan didn't think of the specific reason for a while, so she stopped talking. At this time, the fat man took over the conversation and said:

"I think, it's

a dumb person!" "Hehe~"

Although the fat man's explanation makes people feel far-fetched, this is also the only explanation that can work now, that is:

there is a dumb person who taps the walkie-talkie with his fingers or something to send us a distress signal.

"Mack, Lao Tzu just asks, don't you know!" After

speaking, the fat man was about to pick up the walkie-talkie, ready to start a life-threatening serial call, I hurriedly grabbed

the walkie-talkie and said: "I'm stuck! Don't go back, otherwise let others locate us at three points, but it's bad!" "I'm

also learning to use it, in the last days, the walkie-talkie is not a device that can be used casually, and if you don't use it well, you will lose your own life."

"But don't worry about it, what this Taoist chief said is still very right, this strange distress signal, we don't pay attention to him~"

Zheng Yan sighed softly and said.

"Uh-huh~ If it's really a distress signal, then this person is probably about to breathe. I

leaned back on my stool and spoke.

"Why?" Zheng

Yan asked curiously.

"I can't speak, probably not because the man is mute, but because the man is so badly injured that he can't speak. I think I can still investigate this, I can't get some secrets in Lin'an City from this person. "

I don't believe in fat people, dumb or whatever. If it's a mute, then why do you bring this walkie-talkie in the apocalypse?

So, I think the only explanation is that this person was attacked by zombies or mutants in Lin'an City, and finally barely picked up a small life and came back.

However, because of the severity of the injury, not only in the world, but also in the world, there is no strength to speak, or there is no way to speak, so this knock signal will be used to send a distress signal to the outside.

And the city of Lin'an has been marked as a dead city by me, and I thought that when I received this signal, it was sent to me by the living people inside, but in the end, I still think that this is still sent to me by a dead person, but it is not dead.

"Is the Dao Chief going to look for this person?" Zheng

Yan asked.

"Well, we still have to live in Lin'an for a while, stock up on video living materials, weapons and ammunition, and doomsday RVs, and the living environment here in Lin'an is much worse than Qingshan, so if the person who sends us signals here, I suspect that he knows something, and then he will know himself and his opponent. Finding supplies and dealing with the mutants in Lin'an City also has a better chance of winning. What does

the fat man think?" I explained to Zheng Yan and the others, and then asked the fat man's opinion.

At this time, the fat man also finished eating. After a full hiccups, he said,

"I'm okay with that."

"Haha~ No opinion is the best opinion!" I

patted the fat man on the shoulder and said.

"When are we going to find someone, sir?" asked

the fat man.

"Sooner rather than later, we need to do it right away. We have to find this person before he breathes, and it's good that the White Emperor City is Gu, otherwise it's too late to go and find a bunch of white bones, and it won't be interesting. "

I'm back.

"Oh~"

the fat man then replied.

"Dao Chief, just now I have recorded the strength of the fortunate thing I received just now, which is 30db, and there are still two locations left. You can go to both places. After receiving the signal, the strength of the signal is recorded.

After Zheng Yan finished speaking, she spread out the map and pointed out two points to me, one of which was the end of Lin'an Provincial Road on Castle Peak Road, that is, the western suburb of Lin'an. The other point is in the northern suburbs of Lin'an, that is, to the west of Qingqing Primary School.

--

The author has something to say:

Tomorrow on the last day of the National Day holiday, everyone have a good rest~