Picture of blockchain
MACD is called the moving average of similarities and differences, which is developed from the double index moving average. The fast line dif is obtained by subtracting the slow index moving average (ema26) from the fast index moving average (ema12), and then 2 × Fast line dif-dif's 9-day weighted moving average (DEA) obtained MACD column. The significance of MACD is basically the same as that of double moving average, that is, the dispersion and aggregation of fast and slow moving average represent the current long short state and the possible development trend of stock price, but it is more convenient to read. When MACD turns from negative to positive, it's a buy signal. When MACD turns from positive to negative, it's a sell signal. When MACD changes from a large angle, it means that the gap between the fast moving average and the slow moving average widens very quickly, which represents the change of a market trend.
The strict definition of blockchain refers to the distributed database technology that multiple nodes in peer-to-peer network jointly maintain a continuously growing list ledger constructed by time stamp and orderly record data blocks through consensus mechanism based on cryptography technology. This technical solution allows any number of nodes in the participating system to calculate and record all the information exchange data in the system in a period of time to a data block through cryptography algorithm, and generate the fingerprint of the data block for linking the next data block and checking. All participating nodes in the system jointly determine whether the record is true
blockchain is a technical solution similar to NoSQL (non relational database). It is not a specific technology, and can be implemented through many programming languages and architectures. There are many ways to realize blockchain, including pow (proof of work), POS (proof of stake), dpos (delegate proof of stake), etc
the concept of blockchain was first proposed in the paper "bitcoin: a peer-to-peer electronic cash system" by indivials (or groups) who call themselves Satoshi Nakamoto. Therefore, bitcoin can be regarded as the first application of blockchain in the field of financial payment
< H2 > [popular explanation]no matter how big the system or how small the website is, there is a database behind it. So who will maintain this database? In general, who is responsible for the operation of the network or system, then who is responsible for the maintenance. If it is wechat database, it must be maintained by Tencent team, and Taobao database is maintained by Alibaba team. We must think that this way is natural, but blockchain technology is not
if we think of the database as a book, for example, Alipay is a typical account book. Any change of data is bookkeeping. We can think of database maintenance as a very simple way of accounting. In the world of blockchain, everyone in the blockchain system has the opportunity to participate in bookkeeping. The system will select the fastest and best bookkeeper in a period of time, maybe within ten seconds or ten minutes. The bookkeeper will record the changes of the database and the account book in a block. We can think of this block as a page. After the system confirms that the records are correct, the system will record the changes of the database and the account book in a block, It will link the fingerprint of the past account book to this paper, and then send this paper to everyone else in the whole system. Then, over and over again, the system will look for the next person with fast and good bookkeeping, and everyone else in the system will get a of the whole ledger. This means that everyone as like as two peas in the system is called Blockchain. It is also called distributed account technology. P>
as like as two peas (computer) have identical accounting books, and everyone has the same rights, they will not collapse e to the loss of contact or downtime of a single person. As like as two peas, the data is transparent and everyone can see what changes are in every account. Its very interesting feature is that the data can't be tampered with. Because the system will automatically compare, it will think that the same number of books with the largest number are real books, and a small number of books with different numbers are false books. In this case, it's meaningless for anyone to tamper with his own account book, because unless you can tamper with most nodes in the whole system. If there are only five or ten nodes in the whole system, it may be easy to do so. However, if there are tens of thousands or even hundreds of thousands of nodes and they are distributed in any corner of the Internet, unless someone can control most computers in the world, it is unlikely to tamper with such a large block chain
< H2 > [elements]combined with the definition of blockchain, we think that we must have the following four elements to be called public blockchain technology. If we only have the first three elements, we will consider it as private blockchain Technology (private chain)
1, peer-to-peer network (power equivalence, physical point-to-point connection)
2, verifiable data structure (verifiable PKC system, non tampering database)
3, distributed consensus mechanism (Solving Byzantine general problem, solving double payment)
4 Game design of Nash equilibrium (cooperation is the strategy of evolutionary stability)
combined with the definition of blockchain, blockchain will realize four main characteristics: decentralized, trustless, collective maintenance and reliable database. And the other two will be derived from the four characteristics Features: open source Privacy. If a system does not have these characteristics, it can not be regarded as an application based on blockchain technology
Decentralized: there is no centralized hardware or management organization in the whole network. The rights and obligations of any node are equal, and the damage or loss of any node will not affect the operation of the whole system. Therefore, it can also be considered that the blockchain system has excellent robustnesstrustworthiness: there is no need to trust each other when participating in the data exchange between each node in the whole system. The operation rules of the whole system are open and transparent, and all data contents are also open. Therefore, within the specified rule range and time range of the system, nodes cannot and cannot cheat other nodes
collective maintenance: the data blocks in the system are maintained by all the nodes with maintenance function in the whole system, and these nodes with maintenance function can be participated by anyone
reliable database: the whole system will enable each participating node to obtain a of the complete database in the form of sub databases. Unless more than 51% of the nodes in the whole system can be controlled at the same time, the modification of the database on a single node is invalid, and the data content on other nodes cannot be affected. Therefore, the more nodes and computing power in the system, the higher the data security in the system
Open Source: since the operation rules of the whole system must be open and transparent, the whole system must be open source for the program
Privacy Protection: since there is no need to trust each other between nodes, there is no need to disclose the identity between nodes, and the privacy of each participating node in the system is protected
Meitu purchased 40 million US dollars of cryptocurrency, and Meitu entered the blockchain again. I think this time, it is in the right direction and can stand firm. Bitcoin is an emerging instry that can bring you unlimited space, and blockchain technology is the core technology of bitcoin, which is the most important wind outlet in the Internet era. Whoever can occupy the advantage in the first time can quickly occupy the market with the rapid development of China's economy, the popularity of the Internet is also accelerating, which provides convenience for everyone's life, and also allows us to see a broader future. Meitu purchased 40 million US dollars of cryptocurrency, and Meitu entered the blockchain again. I am optimistic about their development. As the core technology of bitcoin, blockchain technology can change the direction of development in our real life and help us better in our future work. Moreover, blockchain technology can make finance, accounting and other work more transparent and convenient, This solves a lot of problems that are difficult for us to change, which is the real reason why I am optimistic about blockchain technology
every enterprise or company has different views on emerging instries. As Internet enterprises, they are more willing to accept emerging instries. Meitu is basically computer talents. They must have their own ideas for such a large investment. There must be something ordinary people don't see. This investment in cryptocurrency, I'm very optimistic about the future development of blockchain technology this time. After all, it's an instry outlet
in the face of emerging instries, different people have different attitudes. When we evade risks, we also evade benefits. Cryptocurrency and blockchain technology need new cognition and pattern. These are brave people. I am optimistic about their future development
US $260 million is invested in virtual currency, while US $260 million is invested in investment and development. Because after Meitu announced its financial expenditure, it immediately made a reply to this matter, saying that this is the beginning of Meitu's layout of the blockchain, and the digital currency will appreciate in the future. As a company, Meitu naturally wants to develop and earn income, so it has to invest. Since the development prospect of digital currency is good, they will naturally invest
Third, the company also thinks that this is an investment< p> In addition to providing sufficient financial support for the development of blockchain, the chairman of Meitu company also said that because he is optimistic about the development of digital currency, he thinks that in the future, he will invest in digital currency in large quantities. As a profit-making company, Meitu needs sufficient funds to ensure its development. Therefore, investment income is also a way for the company to make profits. The development of digital currency is good, so we choose to invest in digital currency(the picture is from the Internet, if there is any infringement, please contact the author to delete it)
2. Radiation engineers have less damage to armored combat vehicles
3. Radiation engineers have no damage to spiders and mining vehicles
4. Radiation engineers have no damage to buildings
these are the original data
bitcoin, as a big experiment of socialization, has been widely concerned all over the world. However, since the announcement of bitcoin risk notice by five ministries and commissions of the central bank, bitcoin has been in a long-term downturn, and other counterfeit currencies are even worse. At the end of 2013, the price of bitcoin went up, and other counterfeit currencies also went up with the boat
the future is the same. The future and destiny of bitcoin determine the future and destiny of other counterfeit currencies.