What's the difference between doctor chain and blockchain

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the quark blockchain team promised not to conct any pre digging and selling of points, let alone any fund-raising activities such as ICO and private placement

quark blockchain is a kind of blockchain based on PHP language, and ultimately hopes to provide distributed web, distributed storage and distributed streaming media playback services through blockchain technology

the goal is to build a blockchain project that belongs to everyone

2. At present, there are three application deployment types of blockchain: public chain, private chain and alliance chain. What's the difference between them? What are the typical applications<

public chain: open to all, anyone can participate

private chain: open to indivial indivials or entities

alliance chain: open to specific organizations

3. Blockchain is a kind of technology. Blockchain technology is a decentralized distributed ledger database. There are many applications based on blockchain technology.

mining is a proct based on blockchain technology. Mining refers to the virtual currency launched by various companies, which is also called token. If the name is different, the miner is called miner

4. To be exact, blockchain and traditional server cannot be compared together, because blockchain is a technical model, while server is a kind of hardware resource
but if we have to compare them, we can first see the differences or connections between the two characteristics
the traditional server is centralized
take a look at the figure below, it is a typical centralized network, the most central is the server, the others are clients, the server is responsible for providing services to all clients, and the client obtains services from the server, such as downloading files.

5. Supply chain is an application of blockchain
core analysis:
1. Transparency, 2. Openness, 3. Information can not be tampered with, 4. Decentralization,
5. Detailed analysis
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
1. In a narrow sense, blockchain is a kind of chained data structure composed of data blocks connected in sequence according to the time sequence, and it can not be tampered with and forged by cryptography
2. Broadly speaking, blockchain technology uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, and uses cryptography to ensure the security of data transmission and access It is a new distributed infrastructure and computing method to program and operate data by using intelligent contract composed of automated script code.

6. The gold token issued by digix is the gold in the digital asset world. It is a typical representative of asset token project. How can it be linked with gold
gold is the best choice for risk aversion. The gold token issued by digix is the gold in the world of digital assets, and its token, DGX for short, can play a role of hedging in the world of digital assets
How can DGX benchmark gold? It will be gold assets on the chain (that is: blockchain) operation. For example, if you have a kilogram of gold ready for sale, you can cut the gold for sale, but it is too troublesome and easy to cause loss. You can also send 1kg of gold to Singapore for LBMA to verify the gold. After the verification, the certificate of ownership of gold assets will be issued to you
the digital certificate can be converted into 1000 DGX tokens, i.e. 1 DGX token = 1 gram of gold. The circulation efficiency of gold has been greatly improved. Similarly, when you need to extract gold, as long as you have the corresponding token, you can replace it with a certificate to extract gold.

7. 1. Data blockchain is an important concept in the bitcoin financial system. It records the transaction data of the whole bitcoin network, and these data are shared by all bitcoin nodes. Through the data block, we can query the history of each bitcoin transaction. 2. Example: A, B, C three people, a and B all funds are kept by C. Moreover, each capital transaction should be recorded by C. Now suppose that Party A and Party B each have one million yuan in their custody. Then: if Party A spends 80000 yuan to Party B, then Party C subtracts 80000 yuan from the account book and increases 80000 yuan from the account book. If Party B returns 50000 yuan to Party A, Party C will add 50000 yuan to Party A's account book and subtract 50000 yuan from Party B's account book. If Party A pays 50000 yuan to Party B, then Party C subtracts 50000 yuan from the account book and adds 50000 yuan to the account book. 3. The function of data blockchain is similar to that of C's account book. It records the ownership of bitcoin and the transaction of bitcoin. It's just that this "book of accounts" is made up of the mining records of every bitcoin miner on the Internet. If a bitcoin transaction is confirmed by the data blockchain, the relevant information will be recorded in the data blockchain. Bitcoin's "account book" is called data blockchain. All the data blockchains on the network constitute the distributed network database system of bitcoin. 4. The essence of data blockchain technology is a decentralized and distributed data storage, transmission and proof method. It replaces the dependence of the Internet on the central server with data blocks, so that all data changes or transactions are recorded on a cloud system. In theory, it realizes the self proof of data in data transmission, This kind of point-to-point verification will proce a "basic protocol", which is a new form of distributed artificial intelligence. It will establish a new interface and sharing interface between human brain intelligence and machine intelligence.

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