Lin Gao Qiming

Chapter 1957
Then he said, "If every switch is a proposition, and the switch closed is 'true', and the switch is open, it is 'false', and the light bulb is also a proposition, and light is 'true', and off is 'false', then two switches What is the relationship between the proposition represented and the proposition represented by the light bulb?"

"When only two sub-propositions are true at the same time, the compound proposition is true. This is an 'and' relationship." Feng Shan replied.

"Yuzhi, what circuit is this? I told you last time."

Qian Yuzhi scratched his head and replied, "Series circuit."

"Okay, now you modify this circuit to require 'when any switch is closed, the light bulb will be on'." Feng Nuo continued.

Qian Yuzhi thought for a while, removed the two switches from the circuit, and then connected the two ends of the two switches with wires, and then connected them to the circuit of the light bulb and the battery.Then he took the initiative to say: "Two switches connected in parallel can achieve this effect."

"These two switches are in an 'or' relationship!" Li Jianai also rushed to say.

"So, what if we add a hole-reading touch roller to each card reading unit of the sorter and connect it in series with the original touch roller?" Feng Nuo asked again. He glanced at Feng Shan and motioned for her Don't answer.

"Only when the two contact rollers are perforated, which is equivalent to two series switches being closed and able to energize, the relay will work and push the card into the card pocket." Qian Yuzhi replied.

"What is its logical meaning?" Feng Nuo looked at Li Ganai again.

"It is this card that satisfies the 'and' of the two simple propositions represented by the two touch rollers." Li Jianai replied.

"That's right! If you add a few touch rollers to each card reading unit and connect them in parallel, you can control the relay to push out any card with a hole in it, which is equivalent to the simple proposition represented by multiple holes." The 'or' between them!" Qian Yuzhi said happily as if he had also discovered a new world.

"That's it. Tomorrow we will modify it like this. Each card reader unit is equipped with 10 touch rollers, which are connected in series." Feng Nuo is very satisfied, and Qian Yuzhi seems to have learned a lot recently.

In this way, as long as the question to be queried can be expressed as a disjunctive paradigm of "no more than 10 conjunctive items, and no more than 10 simple propositions inside each conjunctive item", the classifier can handle all of them, and the function will be more than Much stronger now.

He looked at his watch, it was almost dinner time.

"The last thing to say is that this type of function of the classifier is actually very closely related to 0-1 Boolean algebra, 'and' and 'or' are actually operations, which we call 'logic operations'. One of the core functions."

"We can see that the 'and' and 'or' of logic operations have an equivalent relationship with the series and parallel connections of circuits; while switches may be closed and disconnected, relays may be energized and de-energized, and bulbs may be turned on and off. Both states of the component can be used to represent 'true', 'false' or '0', '1'. In the future, there will be other electronic components that can do better."

"So, it is very convenient to use electronic circuits to perform logic operations. Moreover, the speed of electronic circuits is much faster than that of mechanical structures, which will be the future development direction of computers."

"Then, here comes the problem. The above are all logical operations. But the computer system does not only need to do logical operations. There are also ordinary addition, subtraction, multiplication, division, square root, and even calculus. These operations, we call It is called 'arithmetic operation'. The tabulator in the computer system is actually a device used for arithmetic operations. Now we can use the mechanical structure to complete the accumulation function. But if I want to use electronic circuits to do arithmetic operations, what should I do? How to do it? The switch can indicate true and false, but it can’t indicate specific numbers.”

Feng Nuo glanced over the three students below, seeing their expectant eyes, a bright smile appeared on the corner of his mouth.He turned away and wrote a line at the top of the blackboard.

"There are 10 types of people in the world, one understands binary and the other doesn't."

A few days later, the conference hall of the machinery factory was full of voices.This is the place where the industry holds regular meetings. The Planning Institute organized a seminar on punched card computer systems here—actually, it was a briefing.The purpose is to introduce the functions of this system to the ministries and powerful departments under the Government Administration Council, so that each unit can go back to study and propose specific application requirements before considering the procurement plan.

The Senate has an urgent need for the collection, management and use of data, so as soon as the meeting notice came out, including the Planning Council itself, the departments of land, civil affairs, finance, taxation, auditing, police, finance, political security and other departments and the Fubo Army Many veterans and high-ranking members of the naturalized people participated in the briefing.

Although Ma Qianju was the main leader in promoting this project, he did not attend the event himself, but only sent a congratulatory letter.The meeting style of the Senate was very concise. Wu De, who presided over the briefing, only briefly introduced the background and progress of the project in 1 minute, and asked Feng Nuo to come on stage to explain and answer questions about the entire system.

Feng Nuo had mixed feelings at this moment, and his eyes were a little sour.Different from the "fishing" I envisioned at the beginning, I have crossed n multiple majors, and the machine I made by myself feels like my own child.

The punched card computer system was not self-produced or imitated in China in the old time and space, and there are very few Chinese materials.There are only a few manufacturers such as IBM in foreign countries, and users are often large enterprises and government agencies, and not much information has been circulated.Its principles and designs are scattered in various documents, and there is actually no complete information available for copying or imitation.

In order to design this system, the project team searched almost all the electronic materials in the large library, and found out all the materials related to this primitive computer—even if it was just a few words, and then rearranged and combined them. Only the compiled references Booklets have equal heights.

The current set of prototypes is the result of many nights of repeated study, discussion, debate, design, manufacture, verification, modification, re-verification, and re-modification by him and many veterans of the project team. The design of the mechanical structure and many key components came from other veterans of the research team, but Feng Nuo, as the main planner, was indescribably excited.

Although this child's "IQ" is not too high, and his appearance is even more silly and thick, but at least it can really start working.In the next step, he will further improve it to make it smarter and run faster-of course, this also depends on the technological progress of the industry.

He is very clear that the mechanical punched card computer is only a transitional product, but this product is the beginning of the more advanced electronic tube and transistor computers in the future. With this simple system, the computer system of the Senate can cultivate the first batch of Professional computer technicians.They will inevitably become the pioneers and users of more advanced computers in the future.

Thinking of this, Feng Nuo's heart was surging, and he almost shed tears.

He sorted out his mood, walked to the position of the speaker, and began to introduce the functions and performance parameters of each component of the punched card computer system one by one...

In the back row of the venue, Li Jianai walked out quietly, and it was time for regular contact again.

She felt a little weird, Jia Ben was obviously in the not-too-distant construction section, and every time she had to go to a specific contact point to make contact. "It's strange to always be like this in the future." She secretly thought, it was strange that she didn't notice that the "organization" arranged two "hidden cadres" in such a small area.

"You've done a good job this year, keep working hard." These were Jia Ben's first words after the meeting.

After finishing speaking, he smiled. Li Jianai didn't know that Jia Ben could laugh too.But immediately his expression returned to seriousness, and he added, "This is not my words, this is what the regional commander commissioned me to convey to you."

"Yes! Thank you for the organization's encouragement and trust!" Li Jianai quickly stood at attention and saluted.

Jia Ben waved his hand, signaling her to relax. "In a few days, another comrade will contact you," he said seemingly casually, "Since you are here, I will probably be transferred soon, and you should pay more attention to the machinery factory in the future. Say."

He didn't mention that he might be transferred to Guangdong, and the Senate is preparing for a metal processing enterprise in Foshan; he also didn't mention that Li Jianai has done a good job in the field of punched card machines during this period, and the higher-ups may consider transferring her to the technical department as a part-time job—— The veterans of the Political Security Bureau have an urgent need to establish a detailed and efficient filing system, and this thing was famously used in concentration camps back then.

"Do you have any other questions?"

At this time, Li Jianai was uncharacteristically, and took out a document with a little embarrassment and handed it over, "What is it?" Jia Ben asked while taking it.

"A love application?" Seeing the words on it, Jia Ben was taken aback for a moment, and then laughed again—this time he laughed much longer than before, as if he had seen something particularly interesting.He glanced at Li Ganai, the girl's face was slightly hot, but she was watching him seriously.

According to the regulations of the Political Security Bureau, "hidden cadres" like Li Jianai must fulfill the "important personal affairs report" system.Romance is also considered an "important personal matter."

Jia Ben put away his smile, but there was still a smile on his face, "Are you serious? I don't encourage you to submit this - you are still young, and now you are a student of the chief, and you have a bright future."

Li Jianai's face turned even redder, but she still didn't answer, looking at Jia Ben stubbornly.

Jia Ben was a little helpless, he put the envelope in his pocket, "Well, in terms of regulations, you have this right. But, you have to know, according to your status, even if that kid Qian Yuzhi is a martyr, the political rating It is considered very high, and it will take a long time to pass this application.”

"Thank you." Li Jianai's voice was as thin as a mosquito, "It's okay, I'm willing to wait."

－－－－－－－－－－－－－－－－－－－－－－－－

Next update: Volume 62 - Guangdong and Guangxi Raiders Chapter [-]

(End of this chapter)