Question: What is the coding principle of EPC? What is the coding type of EP factory?
At present, there are three EPC codes: 64-bit, 96-bit and 256-bit. In order to ensure that all articles have an EPC code and reduce the cost of carrier labels as much as possible, it is suggested to use 96 digits, so that this number can provide unique identification for 268 million companies, each manufacturer can have 65.438+0.6 million object types, and each object type can have 68 billion serial numbers, which is very sufficient for all products in the world in the future.
In view of the fact that there are not so many serial numbers at present, only 64-bit EPC will be used, which will further reduce the tag cost. However, with the development of EPC-64 and EPC-96, EPC code, as a universal identification scheme, is not enough for long-term use, so 256-bit coding appears. So far, EPC-96 Ⅰ, EPC-64ⅰ Ⅰ, Ⅱ, Ⅲ, EPC-256ⅰ Ⅰ, Ⅱ, Ⅲ and other coding schemes have been introduced.
2.4. 1 EPC-64 code
At present, three types of 64-bit EPC codes have been developed.
(1) EPC-64 Ⅰ type
As shown in Figure 2- 1, Class I EPC-64 code provides 2-digit version number code, 2 1 manager code, 17-digit inventory unit and 24-digit serial number. The 64-bit EPC code contains the smallest identification code. The 2 1 manager partition will allow 2 million groups to use EPC-64 code. The object category partition can accommodate 13 1 072 inventory units DD, which far exceeds what UPC can provide and can meet the needs of most companies.
The 24-digit serial number can provide space for16 million items.
(2) EPC-64 Ⅱ type
Besides EPC-64, other schemes can be adopted to meet the requirements of a wider range of companies, products and serial numbers. It is suggested to adopt EPC-64ⅱ Ⅱ (see Figure 8) to adapt to many price-sensitive products and consumer goods manufacturers.
Enterprises whose product scale exceeds 2 trillion yuan and want to apply for product unique identification can adopt EPC-64 II II scheme. The 34-bit serial number can identify at most 17, 179, 869 and 184 different products. As shown in figure 2-2. Combined with 13 object classification area (up to 8, 192 inventory units are allowed), each factory can number 140,737,488,355,328 or more than140 trillion different items. This far exceeds the production capacity of the world's largest consumer goods manufacturer.
(3) EPC-64 Ⅲ type
Except for some big companies and companies that are applying UCC. EAN coding standard, in order to promote the application process of EPC, it is planned to expand EPC to a wider range of organizations and industries. It is hoped that the application of small companies, service industries and organizations can be satisfied by expanding the partition mode. So in addition to expanding the number of item codes, just like the second EPC-64, it will also increase the number of companies that can apply for it.
By increasing the number of managers to 26, as shown in Figure 2-3 EPC-64 III, as many as 67,108,864 companies adopt 64-bit EPC codes. The figure of 67 million has exceeded the total number of companies in the world, so it is enough now. We hope more companies will adopt EPC coding system.
Using 13 bit object classification partition can provide space for 8, 192 different articles. The serial number partition adopts 23-bit coding, which can provide space for more than 8 million (223 = 8388608) items. So for these 67 million companies, each company allows more than 68 billion (236 = 687 19476736) different products to be coded by this scheme.
EPC-96 code
EPC-96ⅰ Ⅰ is designed as an open item identification code. Its application is similar to the current Unified Product Code (UPC) or the transport container code of UCC.EAN (see Figure 2-4).
As shown in the above figure, domain name management is responsible for maintaining the classification codes and serial numbers of objects within its scope. Domain name management must ensure the reliable operation of ONS, and be responsible for maintaining and publishing relevant product information. The domain name management area occupies 28 data bits and allows about 268 million vendors. This exceeds100,000 UPC-12 and ean->; & gt
Question 3: What kinds of phrases are there? What are the coding rules? 1. From the part of speech:
Verb phrases, looking up
Noun phrases, day and night
Adjective phrases, black and blue
First, prepositional phrases.
Participle phrase talking and laughing
Infinitive phrases, in order to get good grades.
It can also be classified in form, so I won't go into details here.
2, Wu Bi font single word coding rules.
First, five-stroke font coding melody
Mastering the coding rules of Chinese characters and being familiar with the coding of each Chinese character is the basis of Wubi font input. The following coding rules of single-character Wubi font have been forgotten:
The five strokes are intuitive and coded according to the order of strokes; Type the key name four times with Chinese characters, please copy the basic root;
Take four yards at the end of one, two and three, and open the bill first; Pay attention to less than four yards, cross-identify the back.
From this Song formula, we can see the general appearance of font coding rules, and at the same time, the formula also summarizes five principles of fonts:
1, according to the law of writing, from form to order, that is, from left to right, from top to bottom, from outside to inside;
2. Take the radicals above 130 as the basic unit;
3. For Chinese characters with more than four radicals, in the order of the first, second and third radicals, only four codes are taken at most;
4. Monomer structure splitting is preferred;
5. Cross-recognition of the last stroke and font.
The following figure is the flow chart of Wu Bi font coding, which is convenient for readers to understand the general situation of the whole coding scheme:
Second, the coding rules of Chinese characters with key names
There are 25 key names * * * in Wu Bi font, and Rikou Tianshanhe, a carpenter of Wang Tuda, a native of Baiyue, has made a statement that his children are in trouble.
Chinese characters with 25 key names correspond to 25 letter keys. The coding of these words is quite simple, and their coding is only letters with four key names. For example, the coding of Yan characters is YYYY, the coding of Yan characters is XXXX, and so on. When inputting Chinese characters with key names, you only need to tap the letter keys where the words are located four times in a row.
Third, the coding rules of radical.
On each letter key of Wu Bi radical keyboard, besides a key name radical, there are some other types of radicals. Some radicals are themselves a Chinese character, and such radicals are called radicals. The roots of words are coded according to the following formula:
Key name code+first code+second code+last code.
When there are only two radicals, the encoding has only three codes, and the formula is:
Key name code+prefix+suffix
For example, Shi Gen's key is D, the code of the first stroke is G, the code of the second stroke is T, and the code of the last stroke is G, so the five strokes of this word are DGTG. Another example is the worm character, whose root is in the J key, the first stroke is vertical H, the second stroke is folded N, and the last stroke is Si (Si) Y, so the five codes of the worm are JHNY.
Fourth, the coding rules of keywords
In the national standard GB23 12-80, there are only over 100 key characters such as the above-mentioned key names and radicals, and most Chinese characters are not radicals, which is what we use most.
The encoding of Chinese characters in Wu Bi fonts is mainly the encoding of out-of-key characters, which can be divided into two categories: pure radical codes and identification codes. If a Chinese character has four or more radicals, the first three radicals are added with * * * to form a code.
Chinese characters with less than four radicals need to be supplemented with a font structure identification code to increase the information that distinguishes Chinese characters.
1, radical code
Each root is assigned to a letter key, and the English on the key is the root code of the root. For Chinese characters with four or more radicals, the first, second, third and fourth radical codes are taken to form the input codes of radicals. First radical code+second radical code+third radical code+last radical code. Here, the first, second, third and last words should be written in the normal order, from left to right, from top to bottom, from outside to inside. ......& gt& gt
Question 4: What are the basic coding rules? BER: Basic coding rules.
The basic coding rule (BER) defined in ITU-T X.209 refers to the data coding/decoding rule described in ASN. 1 standard (defined in ITU-T X.208). Basic coding rules can be used to obtain the transmission syntax specifications of type values, using ASN. 1 to specify those specifications defined in recommendation X.208 A single ASN. 1 object may have several equivalent BER codes. BER is one of the two encoding methods currently used by CryptoAPI.
Question 5: The department coding rule in UFIDA software is * * *, what does it mean? Five points: the first-level department has one star and the second-level department has two stars, so the first-level department number should be 1 and the second-level department number should be 10 1.
Question 6: What does the accounting software subject coding rule mean? The account code is the code length, and the primary code length represents the code length of the first-level account. If your secondary subject code is set to 2, then the secondary code is two digits, and 3 represents three digits.
Question 7: What does the theme coding rule 3222 mean? This topic should be C.
The subject code is 3222, which means that a * * * has four levels of detail.
And 322 means that a * * * has three levels of detail.
1 level has 3 families.
There are two subjects at the second level.
There are two subjects in the third level.
There are 2 subjects in Level 4.
52 1 Yes, 1 level.
52 1, 12 is right, 2 wear.
52 1, 1 2,32,1No, one is missing.
52 1, 24, 26 right, third floor
Question 8: What is the meaning of UFIDA coding rule * * * * * * * mutual * * * *?
this means
1 character, space, 2 characters, space, 4 characters.
Question 9: What are the national standard coding rules? For example, industry standard codes and national standard codes consist of capital Chinese phonetic letters.
The code name of the mandatory national standard is GB.
The recommended national standard code is "GB/T".
The number of the national standard consists of the code number of the national standard, the serial number issued by the national standard and the year number issued by the national standard (that is, the last two digits of the release year).
Example: GB××××× C×××××× GB/T××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××
Code names of national standards are stipulated in Article 4 of the Measures for the Administration of National Standards.
Issued by: OrderNo. 10 of the State Bureau of Technical Supervision.
Release date: 1990.08.24
Effective date: 1990.08.24
The Measures for the Administration of National Standards is a management measure promulgated to better implement the Standardization Law of People's Republic of China (PRC), which plays an important role in the national implementation of technical supervision standards.
Industry standard:
Name code name code name code name code name code
Chinese medicine industry standard ZY postal industry standard YZ pharmaceutical industry standard YY
Non-ferrous metallurgical industry standard YS communication industry standard YD tobacco industry standard YC
Black metallurgical industry standard Ytterbium rare earth industry standard XB health industry standard WS
Foreign trade industry standard WM culture industry standard WH material industry standard WB
Land industry standard TD crosses industry standard TB stone industry standard SY.
Commodity inspection industry standard SN water conservancy industry standard SL electronic industry standard SJ
Petrochemical industry standard SH aquatic industry standard SC commercial industry standard SB
Meteorological industry standard QX aerospace industry standard QJ automobile industry standard QC
Light industry industry standard QB agricultural industry standard NY civil affairs industry standard MZ
Coal industry standard MT civil aviation industry standard MH forestry industry standard LY
Labor industry standard LD brigade industry standard LB education industry standard JY
Financial Industry Standard JR Transportation Industry Standard JT Construction Code JGJ
Construction industry standard JG building materials industry standard JC machinery industry standard JB
Customs industry standard HS environmental protection industry standard HJ marine industry standard HY
Code for construction of chemical industry engineering HGJ chemical industry standard HG aviation industry standard HB
Radio, film and television industry standard GY supply and marketing cooperation industry standard GH public security industry standard GA
Textile industry standard FZ nuclear industry standard EJ geological industry standard DZ
Electric Power Industry Standard Earthquake Industry Standard Database Archives Industry Standard DA
Press and publication industry standard CY urban construction industry engineering construction specification CJJ urban construction industry standard CJ
Recommended standard for engineering construction CECS surveying and mapping industry standard CH shipbuilding industry standard CB
Packaging industry standard BB
Question 10: What does account coding rule 4-2-2 mean? You can set the account level 4-2-2. The four levels of subsidiary accounts are all two-digit codes, such as 4 10 1 production cost 410/basic production cost.