Special properties of bitcoin
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bitcoin (BTC) is a digital currency with a total amount of 21 million. It has the characteristics of decentralization, globalization and anonymity, just like the Internet. It means that transferring bitcoin to the other end of the earth is as simple as sending e-mail, low-cost and unlimited. Bitcoin is also used in cross-border trade, payment, remittance and other fields
the liquidity and limitation of bitcoin determine that bitcoin can act as a monetary function equivalent to general equivalent, or as a measure of money, but this measure is not a physical measure like gold, but a digital proct
related concepts:
1. Address
the address of bitcoin world looks like this. The address itself is just a string of codes, just like your bank account number 321 million 3288372, which is used to mark an account. Everyone can have countless addresses. The address is public
2. The bank records how much money there is in the bank account
the amount of money in the bitcoin address is recorded by the whole bitcoin network. Each complete bitcoin data will record how many bitcoins are stored in this address
each node participating in the bitcoin network can save a complete of bitcoin data, and everyone has a backup on hand to prevent counterfeiting
3. The key (private key)
the key is another string of characters you only know. The key is used to operate the money in the bitcoin address. Key and address are the relationship between a key and a lock. Each address has only one password, and each password also operates a bitcoin address
with the key, you can control the money in the bitcoin address and pay to anyone. The key should be absolutely safe. The lost or deleted key can never be found, and the money in the corresponding bitcoin address can never be used
the key needs to be kept absolutely secret. Anyone who knows the key can steal all your bitcoin
4. Wallet
the transaction process of bitcoin will involve a lot of complex calculations. In order to simplify the operation, we have made wallets. The wallet has client software on the computer, and also has an online web version. The function of the wallet is to pay with a little touch, and the complicated calculation behind it is left to the wallet to complete
5. Security
if you use the computer client software, you can recommend multibit or bitcoin QT. Both are official software recommendations for the bitcoin community. The installation of these two softwares must be downloaded directly from the official website, and the check code must be checked before and after downloading. This is to prevent someone from tampering with wallet software and stealing keys
6. Mining
about every 10 minutes, some new bitcoin will appear in the bitcoin network, which can be imagined as throwing money in the sky. Whose pocket these scattered money fall into mainly depends on whose computer calculates fast. The faster you calculate, the more likely you are to find the money. Mining is to use the computer to calculate, to pick up the money< br />
first, decentralization. Bitcoin is a point-to-point, decentralized digital currency. It does not rely on specific institutions to issue, does not need any government and institutions to carry out credit endorsement, and uses cryptography design to ensure the security of each link< Second, anonymity. You can send and receive bitcoin without providing any personal identity information< Third, scarcity. The total number of bitcoins is limited to 21 million and is expected to be issued in 2140< Fourthly, the transfer cost is low. With bitcoin transfer, no matter how much the amount is, you only need to pay a very low fee. The transfer fee can be set freely. At present, it is recommended to pay 0.0005 bitcoin fee for each transfer< 5. Convenient global circulation. In any country, any intelligent terminal connected to the Internet can carry out bitcoin transfer and transaction
I hope I can help you! Hope to adopt!
bitcoin does not have a centralized issuer. It is generated by the calculation of network nodes. It can be bought and sold on any computer connected to the Internet, and has a strong scarcity
Decentralization: bitcoin is the first distributed virtual currency. The whole network is composed of users without a central bank. Decentralization is the guarantee of bitcoin's security and freedom
Global Circulation: bitcoin can be managed on any computer connected to the Internet. No matter where you are, anyone can dig, buy, sell or collect bitcoin
exclusive ownership: private key is required to manipulate bitcoin, which can be stored in any storage medium in isolation. No one can get it except the user himself
low transaction cost: bitcoin can be remitted free of charge, but a transaction fee of about 1 bitfen will be charged for each transaction to ensure faster transaction execution
no hidden cost: as a means of payment from a to B, bitcoin has no cumbersome quota and proceres. If you know the other party's bitcoin address, you can pay
cross platform Mining: users can explore the computing power of different hardware on many platforms
the content of this article comes from: financial code of the people's Republic of China: application edition, China Law Press
In terms of currency attribute, although bitcoin is a kind of virtual currency with no issuer, it is recognized as worthless currency in reality. Nowadays, many countries restrict its circulation, so many people do not understand it. But it does have a monetary attribute, not only that, it also has an asset attribute
the reason why many countries do not recognize bitcoin as a currency in circulation is that it has too much room for imagination and is not easy to control at the national level. Although it is more convenient, it is more abstract and naturally "shut out" by many countries. However, some countries, such as Japan, recognize bitcoin and digital currency as digital equivalent, and there are many payment application examples in Japan although it is difficult to reach a consensus on a global scale, Japan's behavior also shows that bitcoin has monetary attributes to a certain extent
we should pay attention to the word "skillful" when doing anything. Skillful can make things more effective, especially in mathematical calculation. Skillful calculation can spread students' thinking, make students' thinking more active and broad, skillful calculation can also improve students' calculation speed, so I also pay attention to strengthen the training in this aspect. For example, when looking for the characteristics of skillful calculation when multiplying two digits by 11, I asked the students to find the characteristics of multiplication and proct of any two digits by 11 after calculation, so as to find the secret of skillful calculation when multiplying two digits by 11: pull the numbers on two digits and ten digits apart from each other, and put the results of adding the numbers on two digits and ten digits in the middle of them. This is discovered and summed up by students themselves. Some competent students also expand and extend it, and find out the ingenious calculation methods when multiplying three digits by 11... These ingenious calculation methods are discovered and summed up by students through their own practice. In this way, students not only deepen the impression, but also try to find the fun, so that they are more interested in finding other clever calculation methods in mathematics, to find the fun in mathematics, and constantly improve their computing ability, but also increase their love for mathematics
3. Practice makes perfect
practice makes perfect, which is an unchangeable truth. In mathematics, although it does not advocate the "sea problem tactics", but for the cultivation of computing ability, practice makes perfect is of great benefit. I insist on letting students practice every day, changing different calculation problems for students to practice. Although the amount of problems is small, it aims to improve students' proficiency through practice: proficiency in pithy formula, proficiency in calculation rules, proficiency in using different solutions to different problems... More problems are seen and more problems are done in practice, In this way, no matter what kind of questions you encounter, you can quickly make a response, so as to make a quick and correct answer
4. Strengthen the teaching of simple calculation
simple calculation is also a practical and effective method to improve students' calculation speed. The difference between simple calculation and skillful calculation is that simple calculation is often based on certain operation laws, such as addition commutation law and addition combination law, and multiplication commutation law and addition combination law are often used in addition calculation To a certain extent, the use of these operation laws not only brings convenience to students' calculation, but also provides an important guarantee for students to improve the speed of calculation. Therefore, in the process of teaching, I strengthened the teaching of simple methods
5. Let students remember some commonly used data
I remember an ecator said, A person's memory is the best before he is 13 years old. He can remember many things at this stage. Although he doesn't know why and how some of them are like this, they don't become obstacles that affect his memory. The unknown reasons of these knowledge will be solved with the growth of his age and the increase of his knowledge. Therefore, we should pay attention to the development of students' memory, Especially before the age of 13. The content of calculation in middle and high grades is extensive, comprehensive and comprehensive. Some common operations are often encountered in real life. These operations have no specific rules of oral arithmetic, and must be solved by strengthening memory training. The main contents of my intensive training are as follows: 1) the square result of each number from 1 to 10 in the natural number; ② A method of oral calculation for the square result of two digit number of 5 on a digit; ③ Some specific proct results, such as 125 × 8＝1000，25 × 4 = 100, etc. The results of these special numbers are frequently used in homework and life. If you master them skillfully and remember them well, you can transform them into abilities, which play a good role in calculation and proce high efficiency
Second, improve the accuracy of calculation
doing things requires not only speed, but also quality. Speed alone is not enough, but also quality. So I try to improve the students' calculation speed at the same time, also want to find a way to improve the accuracy of students' calculation< The new curriculum standard points out that we should pay attention to the cultivation of students' habit of checking. Inspection is a good way, it can make people find their own mistakes in time and correct them in time. In the process of teaching, I pay attention to strengthen the teaching of checking calculation, so that students can use different methods to test a problem. While mastering the test methods, I can skillfully use this method to judge the correctness of the answers to similar problems
2. Using estimation to improve the accuracy of calculation
it is mentioned in the new curriculum standard that students' estimation ability should be cultivated. Estimation is a simple and effective way to improve the accuracy of calculation
to improve the speed and accuracy of students' calculation, it needs a period of exploration and practice, and I have only carried out this topic for half a semester, and only a small part of the research has been carried out, and no substantial research results have been obtained. What I have discussed above is only some of my own practices in the preliminary experimental stage and the future research direction
In terms of currency attribute, bitcoin is considered as worthless currency in reality because it is a kind of virtual currency and has no issuer. Nowadays, many countries are restricting its circulation, so there are still many people who do not understand it. But it does have the property of money
first of all, the essence of money is a commodity formed in the process of long-term exchange, which is fixed as a general equivalent. That is to say, without all the modifiers, money itself is a commodity for exchange. Bitcoin can also be used for exchange. It can also be used as a medium of exchange, as a commodity of exchange. It can also make online payment directly initiated by Party B and paid to the other party without any financial institutions
Secondly, bitcoin was born in the period of financial crisis. It is a decentralized digital currency composed of a series of complex computer-generated codes. It does not depend on any organization or country, nor does it have an issuer. It is completely composed of P2P network, cryptography, consensus algorithm and other blockchain systems with existing technologies, and it emphasizes that anyone can mine, share and share information Buy, sell or receive bitcoin. This is the feature of bitcoin as a commodity for exchangethe reason why many countries do not recognize bitcoin as a currency in circulation is that it has too much imagination and is not easy to control as a national level. Although it is very convenient, it is very abstract, so it is rejected by many countries