Blockchain is an important concept of Bitcoin, which uses block chain 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 ; A new distributed infrastructure and computing method for programming and manipulating data using smart contracts composed of automated script codes.
It is essentially a disintermediation database. At the same time, as the underlying technology of Bitcoin, it also has new application modes of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm. Through this application mode, blockchain technology can achieve the following three functions: first, ensure that the data on the chain cannot be tampered with or forged, and improve the credibility and credibility of the data; second, realize the traceability of transactions, do To traceability supervision and responsibility tracking; thirdly, smart contracts can be automatically executed based on contracts, thereby improving work efficiency and reducing operating costs. What is the blockchain? What is the popular explanation of the blockchain? 1. What is blockchain? The key to answering this question is: Never mind what a blockchain is. Many people don't understand what a blockchain is because they are obsessed with the concept of "what is a blockchain?" Attack", "Byzantine general problem" and other concepts are confused. For example, if I ask you "what is a mobile phone?" Don't look down, just think about it. Define "mobile phone". The answer you give must not be "a portable phone terminal that can be used in a wide range" (taken from Baidu Encyclopedia). I can't read this definition well. You will say: Mobile phones are used to make calls, send WeChat, use Douyin, and watch Moments. In the same way, let's not worry about the technical principle of the blockchain, first ask "what is the blockchain for?" Blockchains are used to collectively record public data, or more narrowly, to keep accounts. You said that you can use a computer to keep accounts, but why do you need a blockchain? Because you keep your own account and others don't believe it. Who are you? Why do others believe what you remember? For example, you recorded in your computer that Zhang San owes you 10,000 yuan, and Zhang San said that I also recorded in your computer that you owe me 1 million yuan. what to do then In the past, it was solved like this: find a notary, and the accounts of both of you will be recorded with the notary. If there is a dispute, the account book of the notary shall prevail. That's what banks do, for example. Both of you have deposited your money with him, and there are records of transfers and loans. The blockchain solves it like this: when you keep accounts in your computer, Zhang San also records the same data in your computer. After you record it, you two check each other and agree. This account will be officially recorded. up. The middle does not require the participation of a third party or the so-called "authority" or "certification agency". The way everyone keeps accounts together is also called "distributed" or "decentralized", because everyone keeps accounts, and the accuracy of the accounts is determined by a program algorithm, not an authority. This is the blockchain. After the core is over, the blockchain is as simple as that, a ledger for common accounting. Of course, in the actual application of blockchain, the number of participants can vary, and it will also be applied in many fields including digital finance, Internet of Things, digital assets and so on. For example, in the field of games, everyone records the ownership of game props, prop attributes, etc. together. Bitcoin is the largest application of blockchain in the field of digital finance and digital currency. You say: Huh? Is it that simple? Yes, it's that simple. The rest is a matter of how the technology is implemented, and you don't need to understand it. Just like you only need to know that 4G is faster than 3G, you don't need to know what 4G is. Just make myself dizzy. 2. Let’s talk about Bitcoin in detail Now it is not only you and Zhang San who have to keep accounts, but also Li Si Wang Wu Zhao Liu Wu Qi and their millions of descendants and grandchildren. Millions of people have to keep accounts together. How to record? Same as before, every time an account is transferred, everyone’s computer records it, and then checks with each other to ensure that the accounts of millions of computers are exactly the same, and the account is officially recorded. This is Bitcoin. After the core is over, Bitcoin is as simple as that. Millions of computers keep an account together, and the books are all the same. The account records how much money (bitcoin) each person has. The rest is a question of how to implement the technology. You don’t need to know how to achieve it in detail. You just need to know that the Bitcoin network has been running for 10 years without any major problems. 3. Finance is the ledger You will say, according to what you say, Bitcoin is just an account, why is it so valuable? If you think about it carefully, your deposits, your stocks, and your funds are just a series of numbers in other people's books. The difference is who owns the bookkeeping pen. Going a little further, the real reason why China and the United States are currently furious and arms race in blockchain finance is to win the pen that keeps accounts for the world. This we explain in detail later. You deposit the money in the bank, and the bookkeeping pen is in the hands of the bank. You can think about it deeply, if one day, the bank’s system goes wrong and the money balance in your account becomes 0, how can you prove that there was 38,600 in your account? Or if one day, you are framed by someone and all your bank accounts are frozen, what should you do? It is obviously your money, and if it is not deposited in the bank, it cannot be frozen. If you save it now, it no longer belongs to you. Isn't this setting weird? Of course, this kind of thing will not happen in our country with a sound legal system and advanced technology. But what about some poor and backward countries where the banks may fail at any time and the local currency may be worthless at any time? How can blockchain change this? If this account is recorded on a blockchain that is operating normally, then when the bank says that its computer is broken and cannot find your deposit record, you can tell him, it’s okay, there is a record in my computer, and Not only in my computer, but also in millions of other computers that have the same records as my computer. Likewise, on a functioning blockchain, a bank cannot freeze your account. Because your assets are no longer a string of characters that only exist in its computer, but are widely recognized in tens of millions of computers. At the same time, blockchain has extremely tenacious vitality. The reason why Bitcoin has been able to survive for so many years despite being strictly banned by many countries, and its price is getting higher and higher, is because it is too difficult to be banned. There are hundreds of thousands of computers in the world that record the same Bitcoin ledger, distributed in school computer rooms, ordinary houses, deep mountains and forests, and deep in the wilderness in dozens of countries. No matter how it is fought, as long as there is a machine in the world still running the Bitcoin ledger, it will not really die. The question of what is the blockchain is answered here. The following are some of my views on the future efforts of China and the United States in the field of blockchain finance. This is much more exciting than the blockchain itself! 4. Next Generation World Currency I am here to talk about the advantages of so many blockchains, not to sing the praises of Bitcoin. It is true that Bitcoin is a very successful experiment combining economics with computer technology. Its success has also allowed the smartest people in the world to see the possibility of blockchain subverting the current world monetary system and economic structure. Take Zuckerberg of Facebook, for example. If we want to understand the profound intentions of yesterday's news, we also need to raise our eyes to at least the same height as Zuckerberg. When we mention the money laundering risk, difficulty in supervision, and difficulty in control of the blockchain, we often unconsciously think that the country will definitely suppress it, because it is not conducive to the country's economic order. However, what if we don't always think about how to defend against its possible harm to us, but instead polish it into a sharp blade, which can be used to expand the territory and spread the Chinese civilization? If, I just mean if, we don't take Blockchain finance is used in the national economic system, but is it used in the entire world economic system? As mentioned before, compared with banks, blockchain finance has three very prominent advantages : 1. Open an account with one click, without any procedures such as identity proof 2. The circulation is open, transparent and controllable, so there is no need to worry about the sharp depreciation of the currency price 3. Anti-censorship and anti-freeze These three characteristics may have a negative impact on the economic system of the country, but if they are used to enter the economic system of other countries, they are three extremely sharp knives. Let's boldly imagine what we can get with the extremely convenient and easy-to-use Alipay/WeChat mobile payment plus the unkillable blockchain finance/Bitcoin: There is no need to set up any bank outlets, and no need to reach an agreement with any country, so that people from all corners of the world can use RMB or digital currencies controlled by China to settle accounts with just a mobile phone. And the most ruthless thing is: other countries can't ban it even if they want to. We can get such a new type of world currency and new APP products: Open an account for free with one click on your mobile phone Transfer money without borders Excellent user experience Very high security Anti-censorship, anti-freeze Anti-inflation, exchange rate stability Big country endorsement Far from it, this could dramatically improve the lives of the billions of unbanked people around the world, at least immediately. They will be able to obtain their own global universal free account with one click, and the currency will not need to worry about sudden depreciation or account freezing. 5. The trumpet sounds Undoubtedly, this new type of universal currency will be a new form of currency in the future, and it will also be the ultimate spoils of war in this digital world currency war. Who will be the new world financial rule makers? The internationalization of the renminbi has been going on for many years, but after all, it is still a stock competition under the original world structure, which requires a country and a continent to conquer the city. Wouldn’t it be more interesting if we could become the rule-makers of the new world currency and subvert the entire world currency pattern from bottom to top? Just two days ago, the U.S. Congress conducted a six-hour inquiry into Facebook's digital currency Libra plan. During the period, Zuckerberg said: "I don't know if I can do it, but Alipay and WeChat are desperately working on the blockchain. The horn of the currency war in the digital world has sounded. Warriors, are you ready? After reading everyone's replies and other answers about blockchain, I would like to discuss a question: Is Blockchain Really Decentralized? How Decentralized? Let me first give my point of view. The decentralization of the blockchain is a beautiful idea. At present, in practical applications, it is far from being as decentralized as everyone imagined. In most cases, one person, or a single-digit centralized organization or individual monopolizes more than 51% of the computing power. What is the blockchain? What is the popular explanation of the blockchain? Take the familiar Bitcoin as an example. Almost everyone is saying that Bitcoin is decentralized. There are tens of thousands and hundreds of thousands of mining machines distributed all over the world, which almost eliminates the possibility of conspiracy and fraud. But is this really the case? The picture below is the 2018 Bitcoin mining pool computing power ratio I found on the Internet. I will not expand on the concepts of computing power distribution and mining pools. Both Baidu and Zhihu have good answers. But through this picture, you can clearly see that even the decentralized digital currency Bitcoin, which has been blown into the sky, is not an ideal state where everyone is equal and completely decentralized. Large mining pools and large mine owners with extremely strong financial strength have monopolized the computing power. I have no intention of attacking the owners of mining pools and mining farms, because this is actually the inevitable result of the development of things. Moreover, many of them are pioneers in the blockchain industry and have made a lot of contributions to the development of blockchain. But I just want to illustrate the fact that blockchain is not equal to extreme decentralization and complete decentralization. There is no need for this. So why is the inability to fully decentralize an inevitable consequence of Bitcoin? Because Bitcoin mining can make money, and economies of scale can improve the efficiency of making money. In the earliest days, Bitcoin could not be sold for money, so the computing power was very scattered, and everyone was just for fun. But as Bitcoin becomes more and more valuable, more and more people begin to calculate economic accounts. Bitcoin mining is all about the computing power of the machine. A good machine can mine $100 of bitcoins with only 100 kilowatt-hours of electricity, while a bad machine can mine $100 with 1,000 kilowatt-hours of electricity. And a good machine requires capital investment for research and development and production. In the same way, the electricity bill generated by mining is 60 cents per degree for the average person, but it can be 20 cents to 40 cents for large mines with economies of scale. In this case, it is inevitable that the strong will remain strong, the weak will be eliminated continuously, and the computing power will become more and more concentrated. Then you may ask, Bitcoin is like this, what about other blockchain projects? Unfortunately, more or less the same. And every once in a while, new people will jump out and say that they have solved this problem, but once they start making money, they still cannot escape the simple and powerful economic law of economies of scale. The above is what is the blockchain? The detailed content of the popular explanation of the blockchain. For more information about the popular explanation of the blockchain, please pay attention to other related articles of developpaer!
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It’s been almost a month since the start of school, and on the weekends, a few of us treasured mothers took time out of their busy schedules to meet for dinner and get together. When a few women get together, in addition to talking about their husband and mother-in-law, they must also talk about their children. Qingqing said: "My son is in fifth grade now, and he is very active in his studies. He can complete his homework before nine o'clock every night, read the extracurricular books, and go to bed before ten o'clock."
Hearing what Qingqing said, Fangfang asked with a sad face: "How did your child do it? My daughter is only in the second grade, but she has to do her homework every night after eleven o'clock. After washing, it is before twelve o'clock. It's a pleasure to be able to go to bed." From their conversations, it can be seen that one of their children has strong learning ability and can arrange learning tasks independently; the other has low learning efficiency and has not mastered learning methods. The so-called learning ability, for children, first of all have a correct attitude and awareness of learning. Learning is their ability and means to survive. Learning not only has to be fearful, but also to be the first. Followed by a person's learning methods and learning efficiency. Today, the ability to learn has become even more important. As parents of a child, we should not only focus on his grades, but more on the child's learning ability. Through correct guidance, let children understand the meaning of learning and form good study habits. So, how can parents cultivate children's learning ability? Parents can guide children through the following 5 points to make learning easier 1. Stimulate children's motivation to learn actively Children are always full of curiosity about new things, and they will actively explore and observe carefully. This process is the process of improving children's learning ability; on the contrary, if children are not interested in the things around them, they will not be able to arouse the desire to learn. . Therefore, if parents want to stimulate their children's learning motivation, they must first start by stimulating their children's curiosity. 2. Improve children's self-learning ability Knowledge and time in school are limited. As long as children have good self-learning ability, no matter where they are, they can continue to learn with the development of the times and society. In this way, we will not be eliminated by this society. In children's usual study and life, parents can teach children to learn to use reference books to look up content they don't know and learn to explore by themselves; they also help children change passive learning into active learning, overcome laziness, and let children experience the benefits of active learning. pleasure. 3. Teaching children how to learn science We all know that the cost of learning depends not only on ability and diligence, but also on effective learning methods. As the saying goes, mastering a good study method is half the battle. In today's society, knowledge is updated rapidly. Only with good learning ability and scientific learning methods can children flexibly grasp various information and constantly improve and enrich themselves. Good scientific learning methods include: careful observation, positive thinking, and specifying a reasonable learning plan. 4. Let children develop good study habits Good study habits will benefit children for life. Parents should train their children to learn: prepare for homework, complete the homework assigned by the teacher in a timely manner, listen carefully in class, and have the courage to take the initiative to answer the questions raised by the teacher in class. Good study habits are conducive to stimulating children's enthusiasm and initiative in learning; it is conducive to children's development and change in a good direction 5. Help children set appropriate learning goals If a child does not have a clear learning goal, then his learning process will be aimless and unable to achieve the effect of learning. Therefore, appropriate learning goals can guide the direction of children's learning, give them motivation to learn, and stimulate children's ability to actively explore their own potential. Therefore, parents can help their children to set appropriate learning goals. The so-called appropriate learning goals should not be too high or too low, but should be determined according to the actual situation of the child. Don't go against your child's wishes and demands, it will only backfire. |
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