Bitcoin English introduction Baidu Library
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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 />
1. Bitcoin:
also known as "bitcoin", is a kind of network virtual currency. Internet users can use bitcoin to buy some virtual goods, such as clothes, hats and equipment in online games. Internet users can also use bitcoin to buy real goods
2. The origin of bitcoin: the concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's idea, the open source software was designed and released, and the P2P network on it was constructed. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system
unlike most currencies, bitcoin does not rely on specific currency institutions. It is generated by a large number of calculations based on specific algorithms. Bitcoin economy uses the distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses the design of cryptography to ensure the security of all aspects of currency circulation
extended data :
the generation principle of bitcoin:
starting from the essence of bitcoin, the essence of bitcoin is actually the special solution generated by a bunch of complex algorithms. A special solution is one of the infinite (in fact, bitcoin is finite) solutions that can be obtained from the equations. Every particular solution can solve the equation and is unique
compared with RMB, bitcoin is the serial number of RMB. If you know the serial number of a note, you will have the note. The process of mining is to constantly seek the special solution of this equation system through a huge amount of calculation. This equation system is designed to have only 21 million special solutions, so the upper limit of bitcoin is 21 million
please accept it, thank you.
The concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's idea, open source software was designed and released, and P2P network was built on it. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system
Bitcoin economy uses the distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses the design of cryptography to ensure the security of all aspects of money circulationbitcoin: also known as "bitcoin", is a kind of network virtual currency. Internet users can use bitcoin to buy some virtual goods, such as clothes, hats, equipment, etc. in online games. Internet users can also use bitcoin to buy real goods
bitcoin network generates new bitcoin through "mining". In essence, the so-called "mining" is to use computers to solve a complex mathematical problem to ensure the consistency of bitcoin network distributed accounting system. Bitcoin network will automatically adjust the difficulty of mathematical problems, so that the whole network will get a qualified answer about every 10 minutes. Then bitcoin network will generate a certain amount of bitcoin as a reward to reward the person who gets the answer
users can buy bitcoin, and at the same time, they can use computers to "mine" bitcoin according to a large number of calculations. When users "mine" bitcoin, they need to search for 64 bit numbers by computer, and then compete with other gold diggers by repeatedly solving riddles to provide the required numbers for bitcoin network. If the user's computer successfully creates a set of numbers
bitcoin is e-cash similar to e-mail. Both parties need "bitcoin wallet" similar to e-mail and "bitcoin address" similar to e-mail address. Just like sending and receiving e-mail, the remitter pays bitcoin directly to the other party through a computer or smart phone according to the recipient's address. The following table lists some websites that download bitcoin wallets and addresses for free
< H2 > resources network bitcoin
bitcoin without capital letters indicates a unit of account. For example: "I transferred 10 bitcoin today." The unit is also usually abbreviated as BTC or XBT.
the concept of bitcoin was first proposed by Nakamoto on November 1, 2008, and was officially born on January 3, 2009. According to the idea of Nakamoto, the open source software is designed and released, and the P2P network on it is constructed
bitcoin is generated by a large number of calculations based on specific algorithms. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions
this answer is provided by KangBo finance and economics. KangBo finance and economics focuses on the interpretation of financial hot events and the popularization of financial knowledge. It adheres to the profession and pursues fun. It is a financial content that people can understand and transmits financial value in a variety of vivid ways. I hope this answer will help you.
2014 is the first year of mobile medical, because many people have just heard of this word or just moved their mind to try the water in this year
in 2015, heroes from all walks of life changed from heart to action, trying to open the door of medical st with their best posture. No matter landing smoothly or falling somersault, we all have a hard heart
I had the honor to visit nearly 30 start-up companies on the platform of Unicorn studio in one year, talked about nearly 100 investors and entrepreneurs, researched more than 100 start-up projects, and couldn't help but want to make a comprehensive year-end summary of mobile health
mobile medicine in 2015 is too colorful. Those who come to the competition, bet on the track, watch the excitement or splash cold water can find their favorite plot and draw their own preset conclusions. If you want to show the year of mobile medical in a few simple words, it will inevitably offend a large number of audiences. I'd like to take advantage of the five best-selling movies in 2015 to invite you to take your seats
speed and passion
only this movie can match the mobile medical treatment in 2015. Thanks to the third tier companies that have successfully secured the financing in 2014, thanks to the Internet plus policy of the state, from almost no one to pay attention to more than 3000 medical APP lines on the Internet for more than a year, only the enthusiasm of big steel can be matched.
registration and appointment, online consultation and follow-up of chronic diseases are the most popular entrepreneurial categories. Hundreds of apps called doctor XX can completely confuse you. In diabetes alone, unicorn studio has found more than 50 active apps. There are also many companies in the state of everything ready, only programmers can start
those who have nothing to do with medicine come in to do mobile medicine. Who makes us care about human health? Medical treatment is a 3 trillion plate, including 8 trillion yuan for big health. No wonder Renhe pharmaceutical has set to increase its investment by more than 1 billion yuan on o2o, Ping'an has self-employed hundreds of doctors to do online consultation, Didi has taken a taxi to bring doctors home, registered network has obtained hundreds of millions of US dollars of high price financing, and Ma Yun has called out that doctors will lose their jobs in 30 years
temptation and fear make us remember mobile medical deeply
incredible
after watching mobile healthcare for a year, I can only say that there are too many wonderful places. The 51st document of the health and Family Planning Commission stipulates that medical diagnosis and treatment can not be done online, public hospitals face south, medical insurance does not pay for disease prevention, doctors are unable to practice freely, and the supply of high-quality medical resources is in short supply, all of which determine that mobile medicine is malnourished at birth. There is a lack of wearable hardware and commercial insurance support, and mobile health care is not cheap for patients
although there are a lot of mobile medical services, there are still very few areas that we can do. Naturally, we need to learn from each other. Many apps claim to be used by tens of thousands of doctors or millions of patients, but it seems that no one is using them. Many companies dare to expand from 30 or 50 people to 300 or 500 people in a year. They have no profit, no income, and even can't see where their income is. The only thing that supports their confidence is VC's money and operating figures that don't know whether they are true or false. The instry thinks that a company with a fruit in its name will be the first to fall down next year. I hope it will not affect too many people
disagreers
while entrepreneurship is booming, users are watching coldly; On the other hand, Internet plus medical treatment is good, while medical treatment plus Internet is the right way. While mobile medical represents the future, mobile medical has no future
in 2015, there was an unprecedented divergence in mobile medicine: an anonymous article can almost "knock down" the benchmark of mobile medicine, doctor Chunyu; President Wang Shan, who is enthusiastic about "medical informatization", and Zhang Rui, who advocates "medical decentralization", interrupted each other 18 times in a dialogue; China's largest mobile medical company, the Internet, and Putian private hospital, its biggest financial owner, have made public the contradictions in medical advertising; Some people said that as soon as mobile medical started, others sang that mobile medical entered the second half; At the end of last year, investors did not invest in mobile Internet. At the end of this year, they did not invest in medical income
some people are optimistic about mobile healthcare, while others are pessimistic. No theory can convince the public, and no model can work
Charlotte worries
it's hard for small start-ups to start, and mobile medical leaders also worry a lot. Although the registration network has raised $400 million, which is equal to the total angel investment of hundreds of small companies. However, online traffic can't be realized, and registration can't receive money. Doctor Chunyu, Ding Xiangyuan and registration network have set up offline clinics and hospitals one after another. Good doctors have extended from triage to follow-up. After the e-commerce business of Ali health medicine was frustrated, cloud hospital and online medical service are still not popular. Tencent admits that it doesn't understand medical service, so it invests in companies that it thinks can connect medical information and doctors and patients, It's said that brother pony wants to divide the territory for several companies. Don't kill each other<
Mars rescue
entrepreneurs are all undeniable, and they don't have time to pay attention to other people's ideas. Just like Matt Dimon, who is forgotten on Mars, only when he desperately finds some poor resources can he survive until others come to save you
cooperation between mobile healthcare and commercial insurance is a hot topic in the second half of the year. Both "Tui Tang Gu" and "Teng AI Tang doctor" have been playing seriously. AstraZeneca, Sanofi and Pfizer have made deep alliances with mobile healthcare, and they all want to spend the hard winter of the instry by taking advantage of each other's temperature. Yuyue, Lepu and FRISO want to make their own mobile healthcare, which is to be an app, Who says that programmers in pharmaceutical companies can't solve the problem of difficult medical treatment
the State encourages doctors to practice more, and the closed medical door seems to open a crack. VC does not want to invest in a doctor group, so they are embarrassed to go out and greet people. As soon as the State encourages the implementation of hierarchical diagnosis and treatment, a number of companies have sprung up to do referral flying knife, "responsible medical organization", "integrated medical care" and "Caesar model" have also come
the informatization project, which lays the foundation for mobile medical, has not won enough attention, whether it is Omaha alliance, which advocates medical data standardization and public sharing, or the first Xuanwu Hospital Project invited by Apple Research Kit, or the first cloud hospital in Ningbo and the first Internet hospital in Wuzhen, or the "image cloud" project cooperated by Xi'an yinggu and China Telecom, Their huge heat will be released in the next few years, earth shaking is unknown
if medical e-commerce is also considered as the extension of mobile medicine, this is the most appetizing part of the annual drama. If you want to come, you always don't. You've already put in a lot of money. Even super players like Sinopharm have joined hands with 360 and Jingdong early, waiting for the policy to start. The future of pharmaceutical enterprises is very painful. The interests of hospitals will not be released. It is difficult to change the habits of patients. We will see the benefits of pharmaceutical e-commerce
or this sentence: whether you like 2015 mobile healthcare or not, its story and performance are vivid. You can doubt mobile medicine, but if you ignore it, you will miss a good play
in 2016, there are many suspenses about China's economy. Only when structural adjustment can land smoothly and the original interest pattern is broken can new instries take root. Will the value of mobile healthcare come to light? Will mobile medicine be everywhere or will it be a great success? Which companies will become unicorns of mobile medical? You can preset your own answers and wait for next year to test them.
Bitcoin is a virtual currency. There are no words on it, only symbols. There are many creative ideas about bitcoin symbols. Now it is common to add two vertical lines in the capital letter B. The common symbol font is times + 2 vertical strokes

Ping An insurance company of China is short for Ping An
Ping An insurance (Group) Company of China Ltd is the English full name of Ping An insurance (Group) Company of China Ltd. It was born in Shekou, Shenzhen in 1988. It is the first joint-stock insurance company in China and has developed into an integrated, close and diversified comprehensive financial service group integrating financial insurance, banking, investment and other financial businesses
extended information:
development process
in September 2018, Ping An insurance (Group) Co., Ltd. of China signed a strategic cooperation agreement with Huaxia Xingfu Jiye Co., Ltd., and the two sides will become strategic cooperative enterprises to strengthen cooperation in new instrial towns, comprehensive financial services and emerging instries
in March 2019, Ping An insurance group of China (Ping An of China) and singularitynet, a decentralized artificial intelligence (AI) start-up based on Ethereum (ETH), reached a cooperation. The cooperation between the two sides will first focus on optical character recognition (OCR), computer vision (CV) and model training
