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Blockchain is a chain data structure
Publish: 2021-04-19 01:33:56
1. blockchain does not belong to any instry. Blockchain is a new application mode of computer technology, such as distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and so on. In a narrow sense, blockchain is a kind of chain data structure that combines data blocks in a sequential way according to the time sequence, and it is a distributed account book that can not be tampered with and forged by means of cryptography.
2. Blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. The so-called consensus mechanism is a mathematical algorithm to establish trust and obtain interests between different nodes in the blockchain system
blockchain is the underlying technology of bitcoin, like a database ledger, recording all transaction records. Because of its safety and convenience, this technology has graally attracted the attention of the banking and financial instry
in April 2018, a group of scholars from Oxford University announced the establishment of Woolf University, the world's first blockchain University
in a narrow sense, blockchain is a kind of chain data structure that combines data blocks in chronological order in a sequential way, and it can not be tampered with and forged by cryptography
broadly speaking, blockchain technology is a new distributed infrastructure and computing method, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data.
blockchain is the underlying technology of bitcoin, like a database ledger, recording all transaction records. Because of its safety and convenience, this technology has graally attracted the attention of the banking and financial instry
in April 2018, a group of scholars from Oxford University announced the establishment of Woolf University, the world's first blockchain University
in a narrow sense, blockchain is a kind of chain data structure that combines data blocks in chronological order in a sequential way, and it can not be tampered with and forged by cryptography
broadly speaking, blockchain technology is a new distributed infrastructure and computing method, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data.
3. First of all, we can take a look at the official website explanation of blockchain technology. In a narrow sense, blockchain is a kind of chain data structure that combines data blocks in a sequential way according to the time sequence, and it is a distributed account book that can not be tampered with and forged by means of cryptography
broadly speaking, blockchain technology is a new distributed infrastructure and computing paradigm, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data
as we all know, blockchain technology is an independent underlying architecture from bitcoin system. From the perspective of architecture model, it is a set of distributed ledger, which is naturally used for bookkeeping
in the blockchain technology, if you want to generate accounting records, you need to have the transaction and flow of funds. Therefore, in the initial blockchain technology, the cryptocurrency corresponding to the main network is used as circulation goods, and the circulation transaction records of cryptocurrency between the accounts of the main network of the blockchain will be recorded on the main network
different from other transaction record databases, transaction records on the main network of blockchain technology will be recorded on all block nodes (i.e. all data blocks) in the main network, which is the so-called decentralization principle. That is to say, in blockchain technology, there is no central database to store all records, Every block on the chain has the transaction data of the whole chain, that is to say, every data block is the center
another feature of blockchain technology is that it can't be tampered with, because every transaction on the blockchain will be recorded in all blocks on the chain, so no single data block can change the record. Even if you change it, all other data blocks will also record real data, and each group of data can be traced back to the first time
because of these characteristics of blockchain technology, after the advent of bitcoin, blockchain has also attracted a lot of attention, and many people also began to want to use blockchain technology to make a centerless, traceable and unchangeable data, so as to ensure the credibility of the data
however, blockchain technology also faces many problems, such as single application scenario, non modifiable original error data, non recoverable currency stolen by hackers, etc.
broadly speaking, blockchain technology is a new distributed infrastructure and computing paradigm, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data
as we all know, blockchain technology is an independent underlying architecture from bitcoin system. From the perspective of architecture model, it is a set of distributed ledger, which is naturally used for bookkeeping
in the blockchain technology, if you want to generate accounting records, you need to have the transaction and flow of funds. Therefore, in the initial blockchain technology, the cryptocurrency corresponding to the main network is used as circulation goods, and the circulation transaction records of cryptocurrency between the accounts of the main network of the blockchain will be recorded on the main network
different from other transaction record databases, transaction records on the main network of blockchain technology will be recorded on all block nodes (i.e. all data blocks) in the main network, which is the so-called decentralization principle. That is to say, in blockchain technology, there is no central database to store all records, Every block on the chain has the transaction data of the whole chain, that is to say, every data block is the center
another feature of blockchain technology is that it can't be tampered with, because every transaction on the blockchain will be recorded in all blocks on the chain, so no single data block can change the record. Even if you change it, all other data blocks will also record real data, and each group of data can be traced back to the first time
because of these characteristics of blockchain technology, after the advent of bitcoin, blockchain has also attracted a lot of attention, and many people also began to want to use blockchain technology to make a centerless, traceable and unchangeable data, so as to ensure the credibility of the data
however, blockchain technology also faces many problems, such as single application scenario, non modifiable original error data, non recoverable currency stolen by hackers, etc.
4. VAT invoice is also a kind of invoice. Enterprises with the qualification of general VAT taxpayer can apply to the competent state tax department for purchasing VAT invoice and issue it through the anti-counterfeiting tax control system. Enterprises with the qualification of general VAT taxpayer can dect vat by VAT invoice. Special invoice is the abbreviation of "VAT special invoice". An invoice issued for the sale of goods subject to VAT. After the implementation of the Provisional Regulations of the people's Republic of China on value added tax, in order to ensure the implementation of the tax dection system of value-added tax which belongs to extra price tax, it is printed and distributed for the use of enterprises. When taxpayers sell goods or taxable services, they shall issue special VAT invoices to the purchasers, indicating the sales amount and output tax amount respectively. The use of special invoice as dection voucher is limited to the general taxpayers who are both VAT buyers and sellers.
5. Buy bitcoin and build the next okex app. It supports buying currency, spot and various derivatives trading, Chain Wallet, mine pool, etc. I have been trading in okex for 2 years and have no problems. Don't understand can ask oh, wish you work smoothly
6. Don't be depressed, it must be conditional to get a fixed IP, and then set up your own network through this IP, it will become your biggest trouble, know how to change the IP of the router, the current use is Avalon's 220 mining machine. That's why laomaozi likes mining very much. Don't take it for granted that a meeting will be OK one day, even if water cooling is installed
when the mining machine starts to operate, you need to be extremely careful, register an account of a mining website, and mining is not as simple as you think, and then you need to register
3-1, the machine has problems again. You have to accept it
if it is possible to install water cooling, there should be a relatively cold environment
if you can pull the wire and the wiring board in the balcony, you need to think carefully first. In actual mining, you will obviously feel the importance of temperature for mining, and have the conditions to repair the chip capacitor in the process of water cooling installation! Need to understand the routing, can accept the noise - mining machine noise is very big, it is not suitable
please don't feel indifferent to the above points
if your home is warm, you will set up the network - not just plug in the Internet, but in the workshop. Don't be confused by interests. Hope it can help you? It can be installed conditionally
let's assume two scenarios, first understand these, and then decide whether to join the miners army? Give up if you can't, or sell it as a second-hand machine and download a multibit to store the bitcoin you get
congratulations? Is it possible to set up a network? Yes
at home
3,
in the company< br />1-1
is it warm in that room
I'm a miner. When I make a rumbling sound, there are some things that I can't solve and overcome. You can buy a miner to dig it up. But there's one that doesn't work. The miner's IP is fixed. I think the electricity charge is the whole province, not a big problem. I want to connect the miner to the network for electricity. For example, if you have the conditions to install water cooling, the installation process of water cooling is not as simple as the online tutorial seems. In the environment with low temperature - in addition to being able to power on and off for 24 hours, you have strong hands-on ability - the noise can be controlled to a certain extent by installing water cooling. As for how to dig, it's the simplest thing. It turns out that the mining machinery can't be connected to the Internet
first list the problems you have to face, then you need to figure out how to explain to your family or girlfriend
and if you work hard to move the mining machine to the company, I'll give you a brief list of the practical difficulties you need to face in mining, and hope they don't mind
I can type these words word by word to get a fixed IP address - if you are mining in the company, because from the moment you buy it. Unless you open the window to let the cold air in, do you have the conditions to set up the network, but the strength is bad, the capacitor on the logic board is easy to touch, get fixed IP? Make complaints about.
these real embarrassment is the misfits of miners in the group quietly, tucking away the water, and constantly running the network environment. Digging is 24 hours. We must find out if you have the conditions to do this. You will find that you are so out of tune with the mine. Visit the IP with computer to make some simple settings. To tell you the truth, if you use the graphics card very early, if the miner can't be integrated into your life now, if you find these items, and later use the butterfly machine, but you need to do it yourself, and then make a decision, and you have to succeed at one time, the removal of water cooling will be disastrous: if you buy a miner, then your miner will never be able to achieve the highest computing power it can achieve
2:
if you can stand the noise, you can't set the route. If you are at home:
if your working environment is very quiet? Can tolerate to a certain extent, just received a new 180 ant miner, for example, to have a fixed IP, the noise will exist for 24 hours, but once you lie down or the balcony can open a window, if you are in the company, you only have the choice to turn it off awkwardly, then you must not rush to buy the miner
1. These chip capacitors are very difficult to weld. If you want to set them according to the IP of the miner, you can only move the miner home silently
is it possible to set up the network and set the network to the fixed IP specified on the chassis? If you can't mine, you will face a real loss. We must make it clear that many companies will cut off the network in the middle of the night
1-2, it's useless to find a seller. The capacitor is easy to drop. It's equivalent to putting the outdoor unit of the air conditioner in the room. Once the refrigerant is added, for example, in a low temperature environment, wait to collect the money< br />2-1 If you are a senior blue collar, you want to mine
when the mining machine starts to operate, you need to be extremely careful, register an account of a mining website, and mining is not as simple as you think, and then you need to register
3-1, the machine has problems again. You have to accept it
if it is possible to install water cooling, there should be a relatively cold environment
if you can pull the wire and the wiring board in the balcony, you need to think carefully first. In actual mining, you will obviously feel the importance of temperature for mining, and have the conditions to repair the chip capacitor in the process of water cooling installation! Need to understand the routing, can accept the noise - mining machine noise is very big, it is not suitable
please don't feel indifferent to the above points
if your home is warm, you will set up the network - not just plug in the Internet, but in the workshop. Don't be confused by interests. Hope it can help you? It can be installed conditionally
let's assume two scenarios, first understand these, and then decide whether to join the miners army? Give up if you can't, or sell it as a second-hand machine and download a multibit to store the bitcoin you get
congratulations? Is it possible to set up a network? Yes
at home
3,
in the company< br />1-1
is it warm in that room
I'm a miner. When I make a rumbling sound, there are some things that I can't solve and overcome. You can buy a miner to dig it up. But there's one that doesn't work. The miner's IP is fixed. I think the electricity charge is the whole province, not a big problem. I want to connect the miner to the network for electricity. For example, if you have the conditions to install water cooling, the installation process of water cooling is not as simple as the online tutorial seems. In the environment with low temperature - in addition to being able to power on and off for 24 hours, you have strong hands-on ability - the noise can be controlled to a certain extent by installing water cooling. As for how to dig, it's the simplest thing. It turns out that the mining machinery can't be connected to the Internet
first list the problems you have to face, then you need to figure out how to explain to your family or girlfriend
and if you work hard to move the mining machine to the company, I'll give you a brief list of the practical difficulties you need to face in mining, and hope they don't mind
I can type these words word by word to get a fixed IP address - if you are mining in the company, because from the moment you buy it. Unless you open the window to let the cold air in, do you have the conditions to set up the network, but the strength is bad, the capacitor on the logic board is easy to touch, get fixed IP? Make complaints about.
these real embarrassment is the misfits of miners in the group quietly, tucking away the water, and constantly running the network environment. Digging is 24 hours. We must find out if you have the conditions to do this. You will find that you are so out of tune with the mine. Visit the IP with computer to make some simple settings. To tell you the truth, if you use the graphics card very early, if the miner can't be integrated into your life now, if you find these items, and later use the butterfly machine, but you need to do it yourself, and then make a decision, and you have to succeed at one time, the removal of water cooling will be disastrous: if you buy a miner, then your miner will never be able to achieve the highest computing power it can achieve
2:
if you can stand the noise, you can't set the route. If you are at home:
if your working environment is very quiet? Can tolerate to a certain extent, just received a new 180 ant miner, for example, to have a fixed IP, the noise will exist for 24 hours, but once you lie down or the balcony can open a window, if you are in the company, you only have the choice to turn it off awkwardly, then you must not rush to buy the miner
1. These chip capacitors are very difficult to weld. If you want to set them according to the IP of the miner, you can only move the miner home silently
is it possible to set up the network and set the network to the fixed IP specified on the chassis? If you can't mine, you will face a real loss. We must make it clear that many companies will cut off the network in the middle of the night
1-2, it's useless to find a seller. The capacitor is easy to drop. It's equivalent to putting the outdoor unit of the air conditioner in the room. Once the refrigerant is added, for example, in a low temperature environment, wait to collect the money< br />2-1 If you are a senior blue collar, you want to mine
7. Blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies
blockchain is an important concept of bitcoin. It is essentially a decentralized database. At the same time, as the underlying technology of bitcoin, it is a series of data blocks generated by using cryptographic methods. Each data block contains a batch of bitcoin network transaction information, which is used to verify the effectiveness of its information (anti-counterfeiting) and generate the next block
in a narrow sense, blockchain is a kind of chain data structure that combines data blocks in chronological order in a sequential way, and it can not be tampered with and forged by cryptography
broadly speaking, blockchain technology is a new distributed infrastructure and computing method, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data.
blockchain is an important concept of bitcoin. It is essentially a decentralized database. At the same time, as the underlying technology of bitcoin, it is a series of data blocks generated by using cryptographic methods. Each data block contains a batch of bitcoin network transaction information, which is used to verify the effectiveness of its information (anti-counterfeiting) and generate the next block
in a narrow sense, blockchain is a kind of chain data structure that combines data blocks in chronological order in a sequential way, and it can not be tampered with and forged by cryptography
broadly speaking, blockchain technology is a new distributed infrastructure and computing method, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data.
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