In the end, Wang Xuexin did not let Ban Haolin and Chen Jiefeng do many experiments. Wang Xuexin directly gave the most suitable data for the mercury tube: diameter 10MM, length 1500MM.
Wang Xuexin even provided an overall design drawing: 100 such mercury tubes are fixed in a cylindrical tube like a concrete mixer and rotate continuously.
The reason for continuous rotation is because the mercury column has the most stable performance at 40 degrees and is not prone to signal loss. Therefore, the temperature of the cylindrical tube must be maintained. The rotation is to allow the internal mercury tubes to be heated evenly and each tube is around 40 degrees.
The data and design given by Wang Xuexin surprised Ban Haolin and Chen Jiefeng, because after they made the memory according to what Wang Xuexin said, they found that the sound wave passage time was exactly one second, and the performance was very good at 40 degrees.
Stablize.
The answer given by Wang Xuexin is: China has other R&D teams besides you, and they have already tested the mercury tubes and obtained these data.
This once again made Ban and Chen very excited... The Sun Never Sets still used paper tape and relay storage methods, but Huaxia has successfully used mercury delay line memory, and there are more than one team. This has obviously exceeded Japan's
Not falling and exceeding not a little bit.
There's nothing wrong with what they think.
If each mercury delay line memory can store 1,000 bits, 100 mercury delay line memories can store 100,000 bits. In other words, the data that such a simple thing can store is equivalent to 100,000 relays or electron tubes.
Whether in terms of economy, speed, size, weight or reliability, mercury delay line memory is much higher than relays and electron tubes.
But even so, this kind of memory weighs one ton... Mercury has a high density, so it doesn't seem to be large but it is very heavy.
So Wang Xuexin had to think about a question:
Does a gun detection radar need to carry a ton of memory onto the battlefield?
If just the memory weighs a ton, how much does the entire computer weigh?
Is it appropriate to carry a computer of this weight into the battlefield?
So Wang Xuexin immediately gave Ban and Chen a new task: to use electron tubes to design a special computer for artillery detection radar, and to minimize the required storage space and storage units.
This is why programmers should consider "space complexity" when writing programs.
It doesn't actually make much sense to consider "space complexity" for modern programs, because modern memory can only be as many as many gigabytes, and the amount of memory a small program needs to occupy is almost negligible. It doesn't matter if it's more or less.
But computers in this era are different.
If it is a relay or tube memory, each bit of storage space will occupy a relay and memory.
Although the mercury delay line memory is much better, considering that it needs to be as lightweight as possible for the battlefield, the storage space must be reduced as much as possible.
As for the program... because the calculation steps for each artillery detection radar are the same. They input three coordinates, each of which has three numbers, which are longitude, latitude and altitude. Then based on these data, the trajectory of the parabola is calculated and then combined with the numbers.
The map data comparison finally yields the coordinates of the enemy's artillery positions.
The so-called "program" of computers in this era is the wiring rules.
Since the calculation methods are all the same, the procedures for gun detection radars are the same, that is, the wiring rules for all gun detection radars are the same.
So Wang Xuexin suggested that Ban and Chen directly fix the wiring and encapsulate it instead of being pluggable like a computer... The pluggable design of the computer is to facilitate the writing of different "programs", and the artillery reconnaissance radar only needs one "program"
”, so the pluggable function is redundant.
This can further reduce the weight and volume of the calculation part of the gun detection radar.
At this point, the problem of gun detection radar is almost solved.
The reason why I say "almost" is because the equipment does not just mean that the theoretical problem can be solved, but it must be made in the end. After all, "the ideal is rich and the reality is very skinny" happens all the time when it comes to equipment.
But this is not what Wang Xuexin needs to consider. He can only try his best to make every move well.
After there was an artillery detection radar, there was the issue of artillery. Wang Xuexin didn't think much about it and contacted Lemon Lokov immediately.
At this time, it took Lemonlov a lot of effort to reach Liyuan.
The reason is that at this time, the stubborn army is fighting fiercely with the Japanese. The airspace of the stubborn army is full of Japanese planes, even the sky above Chongqing is no exception.
Under such circumstances, it is very dangerous to take a plane from Chongqing to Liyuan, and the recalcitrant army has a great demand for aircraft during the battle. It is difficult to allocate a special plane to Lemon Lokov, but Lemon Lokov still wants to
We took off at night and arrived in Liyuan early the next morning.
For Lemon Lokov, this risk is worth taking, because every time he goes to Liyuan, he has gained a lot. If he had not considered the opposition of the stubborn army, he even planned to stay in Liyuan like Eagle Sauce to be ready at any time.
Keep in touch with Wang Xuexin.
As soon as Lemonlov entered Wang Xuexin's office, he hugged Wang Xuexin enthusiastically: "My friend, just as you guessed, Hans really divided his forces into two groups to attack the Baku oil fields and Stalingrad, because there are
You reminded us that we have made preparations in both directions, and Hans’s supposed sneak attack did not bring any benefit!”
Wang Xuexin was a little surprised when he heard this. He asked: "Hans thought that the sneak attack did not bring any benefits? Comrade Lemon Lokov, why do you emphasize 'sneak attack'? Could it be that..."
Lemon Lokov sighed and nodded helplessly: "You are very smart, Comrade Commander! Yes, just as you guessed, although we are prepared in both directions, the battle situation is still unfavorable
Optimistic, it’s hard for me to imagine what would have happened if we weren’t prepared without your reminder!”
Wang Xuexin felt doubtful in his heart.
This shouldn't be the case. Historically, Hans has never won in the direction of Baku or Stalingrad. Now that Wang Xuexin has reminded them to prepare, shouldn't they have an advantage? Why are they still "not optimistic"?
What's the problem? Did Mao Xiong do something sexy again?
Seeing Wang Xuexin's puzzled expression, Lemonlov explained helplessly: "Originally, the battle situation has always been in our army's favor. We fought beautifully in defensive battles in both directions, but more than a month after the battle started,
Hans used a missile with a range of more than two hundred kilometers, and the situation was reversed..."
Hearing this, Wang Xuexin was so shocked that he almost fell down.
V1 missile?
This thing appeared on Hans's battlefield against the bear?