Back to the Republic of China to be a editor

"Weather, altitude, air pressure, these parameters, the Chief of Staff Su told me before. The type of artillery has been changed to a Japanese 100mm cannon, and the type of ammunition is ordinary grenade. Temperature and humidity, Chief of Staff Su said, there is no such data now... But future artillery, especially Soviet heavy artillery, will have this parameter, so I will reserve these buttons here first.”

The current state of PJX-1 only calculates the trajectory of one type of artillery. If you want to switch to another artillery, such as changing from the 122 howitzer regiment to the 105 howitzer regiment, you need to reset the machine.It is also possible to implement a one-machine compatibility system without flashing the machine, but first, it will be much heavier. Second, the memory of PJX-1 is only 8KB...

"Minister Tang, the staff team is ready, shall we start the competition?" Su Jin asked.

Tang Hua nodded.Su Jin took out three sheets of paper, a set of parameters, in triplicate, and handed one each to Tang Hua and the artillery staff group next door.

The staff team worked intensely, first marking the position on the drawing board and map, referring to the shooting table, calculating the approximate value of the distance and the influence of non-standard weather and ballistics, and then using these data to obtain the firing angle and azimuth of the artillery.After calculating these two numbers, notify the artillerymen to adjust the artillery, and the artillery can only be fired after the completion.

The calculation here includes the operation of trigonometric functions and the numerical solution of differential equations, neither of which is easy to calculate.You can look up the manual for trigonometric functions, but you can only use human flesh for differential equations. At most, you can use a slide rule.

Moreover, if you consider the strange parameters such as altitude difference, air pressure, temperature, etc., the amount of calculations will have to go up again.

Tang Hua just glanced at the parameters on the paper, entered a few lines of data with the numeric keypad, and pressed the two surrounding buttons to get the result.At this time, the staff team next door was still checking the trigonometric function table.

Su Jin and Chen Xilian were right behind Tang Hua. At first, they still looked at their watches, but it took less than a minute for Tang Hua to complete the input and calculation. The watch timing was meaningless.

"Commander Chen, the small light display panel array on the left is used to store ready-made data. For example, the result I have calculated now is that the artillery fires according to this parameter. Next, we need to switch firepower to fight other things, but after a while Yes, we need to play a few more rounds according to the first parameter, then the stored results can be recalled. Or, the artillery of our artillery regiment is arranged in several places according to the battalion, then we can do calculations for each battalion separately, Calculate the three results and store them separately, and when the whole regiment needs to shoot, read these three parameters in turn, and use the walkie-talkie to send instructions to the three artillery battalions to fire at the same time."

The staff group next door is still counting...

Commander Chen felt that this comparative test was unnecessary.

"Take this computer to Shenyang and organize an artillery drill."

……

Ministry of Electronics and Information Industry, Beijing Institute of Computer Science.

The PJX-1 was handed over to Su Jin at the Artillery Command, and the computer was considered "sold".

PJX-1 plus a walkie-talkie can basically improve the reaction speed and average accuracy of heavy artillery by an era.

In the original Vietnam War, the U.S. Army actually relied on FADAC. It used the defenders of an infantry battalion to kneel down the two Vietnamese army divisions who besieged Xishan.

I made a PJX-1 myself, and I have to assign tasks to the new generation of researchers at the Institute of Computer Science. Now the fire control computer of the Hongqi-1 low-altitude air defense missile has nothing to do with them.

"The fire control computer research group has to be divided into two, because there are now two parallel projects." Tang Hua said, "The first project is the vector computer, and the fire control computer of the anti-aircraft missile is equivalent to the prototype of the vector machine. , on the basis of it, you can continue to advance according to the design requirements. The second project is the fire control computer of the anti-ship missile, ah, this may be a little simpler than the fire control computer of the Hongqi-1. Part of the flight phase can be considered as a missile moving on a two-dimensional plane, but the anti-aircraft missile is different in that it maneuvers in three dimensions."

The researchers of the Institute of Computer Science became active immediately, because they had not done research and development for more than a month. After the first version of the fire control computer was developed, it was all about bug checking and repairing, which was time-consuming and tedious.

"The third project is a joint project between the Institute of Computer Science and the Institute of Communication Electronics, the new walkie-talkie."

"New walkie-talkie?" Zhang Jue couldn't help interjecting even though he was appointed as the research and development team leader of the vector machine, "Isn't this D-1 walkie-talkie not necessary now? The world's smallest walkie-talkie, even Americans need two It will take three years to catch up."

"Small is small enough, and there is no need to shrink it for the time being." Tang Hua smiled and said, "The D-2 walkie-talkie is roughly the same in size and weight as the D-1, but it needs to implement the anti-eavesdropping function. Use frequency domain replacement technology For details, see the technical information I sent to the third group."

……

When he came back from Jilin and went to Dalian by the way in December, Tang Hua specially found Wang Zheng who was staying there to solve the problem of the Volunteer Army's communication equipment.

"Minister Wang, if the walkie-talkie and walkie-talkie can prevent the U.S. military from eavesdropping on the same frequency, how meaningful will it be tactically?"

"That's amazing. When the front-line troops use the walkie-talkie, they don't need to make up code words. All tactical arrangements are tantamount to secrets. You don't know, all armies are now looking for Chaozhou soldiers to serve as communication soldiers..."

"Haha, is that right? Now I have an idea that makes it almost impossible for the US military to eavesdrop on our walkie-talkies. There is only one situation where we can eavesdrop, and that is when our walkie-talkies are completely seized by the US military."

Minister of Communications Wang Zheng fell into deep thought.

When he was thinking, Tang Hua added: "This kind of walkie-talkie is the only one. If the U.S. military does not obtain the same walkie-talkie as ours, then he will definitely not be able to eavesdrop. If a complete walkie-talkie is seized, there is still a An insurance. This kind of walkie-talkie can only communicate with other walkie-talkies in our army after entering a series of 6 numbers. If we change the 6-digit password every two or three days, it will take some trouble for the US military. "

"Let the soldiers who use the walkie-talkie prepare a glory bomb!" Wang Zheng said, "Instead of blowing up himself, if he is about to be captured, he can tie the grenade and the walkie-talkie together and blow it up. Is that okay?"

"Then it's settled?"

"When can you give it to me?"

"Minister Wang, it's not so fast...in half a year..."

Chapter 113, Going to the Soviet Union to bring goods and sell them

"The last task of the computer institute is given to the intern. Let the intern... make a toy."

Drawing on the lessons of last year, this year Tang Hua has been visiting various universities since January to draw fresh graduates into his bowl.Now in the first semester of senior year, these students have the last semester left after the final exam. They just use this semester to distribute books on computer and microelectronics to interns to complete their knowledge.Now there are no computer departments or microelectronics departments in every university. Tang Hua is urging the Ministry of Education to adjust the colleges and departments.Therefore, it is best to give interns something to do in the last semester. They can not only do some work, but also use the opportunity of practice to deepen the learning effect of computers and microelectronics.

There are no interns in the conference room now, only two researchers who are scheduled to serve as interns.After hearing Tang Hua's words, the two stared at each other, not knowing what it meant.

"It means what I said, a toy. It's very simple, but the workload is heavy. It can keep these twenty or thirty interns busy for a while, and it's also just for them to practice all the knowledge in front of the textbook." Tang Hua said.

……

Tsinghua University, Department of Physics.

"Mr. Zhao, your telegram." The master in the reception room appeared at the door of the building, "It's from Moscow."

Zhao Zhongyao took the telegram and signed it, and opened it to read while going upstairs.After reading it, I turned directly from the second floor to find Qian Sanqiang.

"Three strong, "Journal of the Russian Physical Chemistry Society" has accepted our paper." Zhao Zhongyao said, "However, the letter from the Soviet Academy of Sciences said that according to the opinions of the Soviet Central Committee after review, some content of the article has been cut. However, the Soviet Academy of Sciences has This paper, no, takes this research very seriously, and now calls to invite us to go to the Soviet Union as soon as possible, to host a symposium on lasers and physics. Is this symposium... classified?"

"Lasers are used for military purposes, so some content must be reduced. It is probably enough to explain the theory and principles of lasers." Qian Sanqiang said, "Let's go to the academic seminar."

Lao Zhao and Lao Qian have a calm attitude, because they have published many articles in various internationally renowned journals.

Actually... "Journal of the Russian Physical and Chemical Society" is the top journal of physics and chemistry in the Soviet Union.And it is one of the oldest academic journals in Russia.

The third issue of "Journal of the Russian Physical Chemistry Society" in 1869 published a paper "Relationship between element properties and chemical atomic weight" by a professor of chemistry named Dmitry Ivanovich Mendeleev.Laomen discovered that elements with similar chemical properties do not have similar atomic weights; on the contrary, some elements with different properties have similar atomic weights.He seized this characteristic and tinkered with the first periodic table of elements.

"Then notify Tang Hua now?"

"Okay. No, what notice? Let's go to Tang Hua's place and tell him the news in person."

……

"Mr. Zhao Zhao Zhao, you guys did the experiment. I didn't start writing the paper, and I didn't even read the paper after it was finished..." Tang Hua's expression is very embarrassing now, "I'm not the author of the paper, why did you drag me in?" gone?"

"It was you who proposed that stimulated radiation can be transformed from theory to application; stimulated radiation amplification was proposed by you," Zhao Zhongyao told him one by one, "you also proposed the use of a resonant cavity to generate laser light of sufficient intensity; in fact The entire laser research project was brought in by you; most of the dozens of boxes of equipment you asked me to bring back to China were purchased for the production of lasers for laboratories; and the materials you bought were just right. There is no shortage, and what is missing can be found in China or made by yourself. There are high-precision spirit levels and polishing equipment, rubies, high-temperature-resistant chambers, and even a can of neon gas and a can of helium gas!...Tang Hua, You actually thought of this thing a long time ago, but you just don’t have time to do it, and you just found the two of us who have free time, so you leave it to us, right?”

Tang Hua was contemplating how to refute with words, when Qian Sanqiang made another critical attack.He took a few photos out of his bag.

"Tang Hua, we filled the blackboard in the classroom that day. After I finished, I locked the door immediately. The next day I went to the teacher with a camera and took pictures of the blackboard. Look, this, this, this is all you handwriting, right?"

Tang Hua: ...

Teacher Zhao, no, Uncle Zhao, the laser is really the first thing you do, not you, a DIY master, I can't handle so many precision parts with extremely small tolerances in the laser.Even if you buy a bunch of precision instruments and processing equipment from the United States, you can't handle it.

After sending Lao Qian and Lao Zhao away, Tang Hua hurriedly sent someone to send a telegram to Moscow. Fortunately, there was an old acquaintance there, Vavilov, the president of the Soviet Academy of Sciences.Taking advantage of the fact that the magazine was still a few days away from going to press, Vavilov asked his subordinates to change the order of the authors of the paper to Zhao, Qian, and Tang, and he would just be the third author.After the dissolution of the Soviet Physical Chemistry Society, the "Journal of the Russian Physical Chemistry Society" was directly under the Soviet Academy of Sciences, so it should not be a big problem to find Lao Wa for this matter.

As for going to the Soviet Union, what kind of symposium on lasers and physics... In this case, let's go to a meeting.Before, I was hesitant to go to the Soviet Union to give a report on the development of computer technology (actually to promote the T51 computer). Since computers and lasers both need to go to the Soviet Union, the two things together may really have to go once.