After setting up the sorting machine, Feng Nuo turned on the machine, and the cards began to be sorted. He asked Li Janai and Qian Yuzhi to look at the machine, and then went back to the computer room with Feng Shan to check the operation of the server.
At almost noon, Feng Nuo returned to the workshop. The cards had been sorted. He looked at his watch and saw that it took a little more than 2 hours. For sorting 10,000 cards, the speed was quite fast. However, Li Janai and Qian Yu
Instead, he sat by the machine in frustration.
It turned out that no matching cards were found.
This is very strange. Fonnuo thought for a while and looked at the sorting machine. He noticed that there were no cards in the card bag No. 9, but there were several cards in the card bag No. 10, which showed that these cards were inverted.
At the last gate, he picked up a card from the card bag No. 10 and looked at it - these cards had previously been printed with the corresponding numbers in each column on the top using a decoder.
"2750. The head of this household is not named Lin Guanghui." Feng Nuo said. "Check, 3354, this is Lin, no problem. Then there are 2567, 2750."
"Lin Guanghui, this person's name is Lin Guanghui..." Li Janai was angry and funny.
"Did you make a mistake when drilling?" Feng Shan asked.
"Hmph," Feng Nuo snorted. He thought that this person was probably a refugee admitted to the Guangzhou Refugee Camp, so he brought the word "Guang". As for "Gray", it was probably because all the colors were used in the name on the day of admission.
Bar.
"Original place: 12216, this is Fujian. Occupation: farmer. Composition: military household." - It seems that this household probably has nothing to do with the Baitulin family.
Based on this information, Li Janai found the "Permanent Population Registration Form" of Lin Guanghui's family members in the "Fujian" and "Farmer" stacks of the household registration information form, copied the necessary information, and wrote it into a certification document
.An explanation of the information review process was also attached at the end, and Feng Nuo also signed it.
The senators are now consciously solving the problems they can see. Whether it is a matter of their own one-third of an acre of land, after all, it is a matter of the Senate, and that is their own matter.
After everything was written, Li Janai was ready to send the certificate.
"Kana, you don't have to come back. In the afternoon, go to Tiandihui to go through the transfer procedures and bring the files." Feng Nuo ordered.
Later, he asked Feng Shan and Qian Yuzhi to sort out the cards and count the number of people according to their registered place of residence, surname, place of origin and occupation, and then compared them with the manual calculation results to formally test the prototype of the classification machine.
One week after she officially changed her job, Li Janai received a letter from a mailbox number when she went home. She didn't look around, she immediately picked up the envelope and quickly stuffed it into her pocket.
At night, Li Janai couldn't wait to find an opportunity to open the letter. There was no header or signature inside, only a few simple coded instructions. She carefully checked several secret messages and after confirming that they were correct, she suppressed her inner excitement and destroyed it.
received the letter.
When Li Janai arrived at the contact point specified in the letter as promised, her jaw almost dropped. She didn't expect that Team Leader Jia, who often came to the electronic equipment workshop to guide them in technology, turned out to be her superior. She had never noticed it.
Jia Ben didn't show any surprise. He didn't explain why he broke off contact with her - Li Janai naturally didn't ask - he just briefly asked about Li Janai's situation during this period, and accepted the work report she handed in.
and a personal summary. After instructing her to "do everything according to the past policy", she left in a hurry.
The next day, when Li Janai returned to the workshop in high spirits, Feng Nuo was instructing Feng Shan and Qian Yuzhi on how to use the sorting machine, and also wrote a lot of things on the blackboard. Seeing Li Janai come back, he nodded and told her to do the same.
Come and listen together.
The test of the classification machine was very successful, but the inability to handle the "or" condition is indeed a big limitation. Regarding how to improve it, Feng Nuo already has a general idea in mind, but today he will use this as an example to teach the students
Lesson.
This actually involves the core principles of computers. What he wants is not a simple operator, but a programmer who can actually use it.
"Today, we will theoretically analyze what kind of problems our classification machine can solve and what kind of problems it cannot solve."
"First, sorting. There is no doubt that this problem can be solved. We align the card reading contact rollers on the 10 card reading units with 0-9 in the same column, and the cards will be pushed to the
In the 10 card pockets, when the cards are reassembled into a pile by hand, the cards are sorted according to the size of this column of numbers."
"Secondly, single condition classification. 'Divide all cards into two stacks of male and female'. This can be completed completely. You only need to open a card reading unit and align it with the 0 hole in the gender column. The gender is 0, which is female.
Will be pushed into the card pocket, but men will not."
"Third, multi-condition classification. This requires specific analysis. I will ask you a few questions, and you can think about how to use the classification machine to complete it. The first question is, assuming that we now have household registration cards for the entire East Asia region, I want
How to find out the card of Jialai Commune in Lingao, Hainan? Yuzhi, please tell me."
"Let the card reading units No. 1 to 7 filter out the cards with household registration address 1001014 in sequence." Qian Yuzhi replied.
"Correct. Kana, second question, I still have household registration cards for the entire East Asia region. Now I want to find out the cards for Sanya except for slaves. How should I do it?"
"Sanya Region includes two county-level units, Sanya Yulin, code 10011, and Sanya Tiandu, code 10012, and its subordinate slave area code is 1001299."
"Let the card reading units No. 1 to 4 filter out the cards with the first 4 digits of the household registration address being '1001' in sequence; then let the card reading unit No. 5 push the card with the 5th digit of the household registration address being '1' into the card bag No. 5.
These are the cards from Sanya Yulin; let the card reading unit No. 6 push the cards whose fifth digit is not '2' in the household registration address into the card bag No. 6. At this time, the remaining cards on the machine are the cards of Sanya Tiandu; let the card reading unit No. 7
The card unit pushes the cards whose sixth digit in the household registration address is not 9 into card bag No. 7. These are the cards from Tiandu 11~89 Commune in Sanya; let the card reading unit No. 8 push the cards whose seventh digit in the household registration address is not 9.
Enter the card bag No. 8. These are the cards from Sanya Tiandu 90-98 Commune. At this time, the remaining cards on the machine are the slave cards of Sanya Tiandu. Combine the cards from card bag No. 5, No. 7, and No. 8 to get the required cards.
Result." Li Janai thought for a long time before answering.
"Very good, Kana, correct." Feng Nuo was a little surprised.
"Feng Shan, now I have all the household registration cards of Lingao. First, find the people named 'Liu Si' who live in Shisan Village and Bairen Commune; second, find the people whose origins are Fujian and Hainan. You
Try these two questions."
"Neither of these two problems can be solved." Feng Shan replied after thinking for a moment.
"Why?"
"The reasons are different. The first problem cannot be solved because there are not enough card reading units," Feng Shan said.
"To ensure that the name on the card is "Liu Si", you need to ensure that the column storing the name on the card is the 8-digit location code of "Liu Si". This requires 8 card reading units to exclude cards that do not meet the conditions. It can be said that reaching
All the cards in the 9th card reading unit are named "Liu Si";"
"However, there are only two card reading units left in the sorting machine at this time. Bairen Commune is '11' and Shisan Village is '18'. You can use the No. 9 card reading unit to read the 6th 'Commune' of the household registration location.
Cards that are not '1' are excluded. At this time, the remaining cards on the machine are 'Liu Si' from communes 11 to 19. Among them, you can use the No. 10 card reading unit to push the card with the 7th digit '1' into the card pocket.
This is 'Liu Si of Bairen Commune', but it is not enough to sort 'Liu Si of Thirteen Villages' from the remaining cards. So the application cannot be completed."
"However, if there is another card reader unit on the sorting machine, this application can be solved."
"Well, good. What about the second question?"
"The second problem is not that all card reading units are used, but that our current sorting machine cannot be solved by design."
"Tell me about it."
"Originally from Hainan, the code is 100, from Fujian, the code is 122. We can first use the No. 1 card reading unit to select the card with the first digit of the household registration location being '1'. But later if we choose to launch the card with the second digit being 0
card, then we cannot continue to filter the cards whose third position is also 0, which will cause the cards of Hainan (100), Taiwan (101), and Jeju Island (102) to be no longer separated; if we choose to launch cards whose second position is not 0
, it will cause the Fujian card to be pushed into the card pocket and cannot be further separated from other cards."
"Very good. This is the problem that Chief Zhong said cannot be done with the 'OR operation'. He said it in a relatively general way. Let's analyze it theoretically now and see why we can't solve this problem." Feng Nuo walked to the blackboard and said.
"The so-called theoretical analysis means abstracting the specific questions I asked you before into a general question for study."
"When we want to find any card, there is always a series of conditions that describe the target card. This series of conditions is called a 'proposition'. These conditions are reflected in the screening method, which is whether a certain hole on the punched card is perforated.
Note, that is to say, there are two possibilities for each proposition, yes and no, which we call 'true and false'."
"Now we have two concepts, proposition, true and false. Ultimately, whether a card is the card we want is often limited by many conditions. Each condition is a proposition, so our ultimate goal is to be determined by many
A new proposition resulting from the synthesis of propositions can be called a 'compound proposition', and each condition that makes up a compound proposition can be called a 'simple proposition'. Naturally, a 'compound proposition' also has 'true and false'."
He wrote on the blackboard: proposition, true or false, compound proposition, simple proposition.
--------------------------------------------
Next update: Volume 7 - Strategy of Guangdong and Guangxi Chapter 60