Blockchain technology is not a database
broadly speaking, blockchain technology is a new distributed infrastructure and computing paradigm, which uses blockchain 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, and uses intelligent contract composed of automated script code to program and operate data
as we all know, blockchain technology is an independent underlying architecture from bitcoin system. From the perspective of architecture model, it is a set of distributed ledger, which is naturally used for bookkeeping
in the blockchain technology, if you want to generate accounting records, you need to have the transaction and flow of funds. Therefore, in the initial blockchain technology, the cryptocurrency corresponding to the main network is used as circulation goods, and the circulation transaction records of cryptocurrency between the accounts of the main network of the blockchain will be recorded on the main network
different from other transaction record databases, transaction records on the main network of blockchain technology will be recorded on all block nodes (i.e. all data blocks) in the main network, which is the so-called decentralization principle. That is to say, in blockchain technology, there is no central database to store all records, Every block on the chain has the transaction data of the whole chain, that is to say, every data block is the center
another feature of blockchain technology is that it can't be tampered with, because every transaction on the blockchain will be recorded in all blocks on the chain, so no single data block can change the record. Even if you change it, all other data blocks will also record real data, and each group of data can be traced back to the first time
because of these characteristics of blockchain technology, after the advent of bitcoin, blockchain has also attracted a lot of attention, and many people also began to want to use blockchain technology to make a centerless, traceable and unchangeable data, so as to ensure the credibility of the data
however, blockchain technology also faces many problems, such as single application scenario, non modifiable original error data, non recoverable currency stolen by hackers, etc.
bitcoin trading platform has many running platforms, such as mtgox in Japan, bitcoin in China and so on
therefore, investors need to choose a reliable bitcoin trading platform. The reference factors are: 1. The longer the running time, the better; 2. The bigger the instry reputation, the better; 3. The larger the team size, the better; 4. Being able to visit<
it is suggested that China choose "fire coin net", which is cooperated by Wukou School of finance of Tsinghua University. Sequoia Capital has invested 10 million US dollars; The choice of coinbase in foreign countries is an important choice for Silicon Valley banks to invest.
College Students' innovation and entrepreneurship ideas include printing and ing services, leisure errands, school leisure food stores, college students' Tutoring instry, and online stores 1. Printing and ing service in fact, many schools have printing and ing stores. It seems that the market is saturated, but in fact, there is still a lot of space. Especially in the graation season, students have to print various reports, resumes and other information. The key to starting a business is to find the right location 5. Setting up shop on the Internet the sales volume of health care instry on the Internet is even more considerable than that of books and music. Buying daily necessities on the Internet is often favored by people because it can avoid the curious eyes of people on the street and face the situation of salesmen extended materials precautions 1, risk perception the risk perception of entrepreneurs depends on the entrepreneur's self-confidence, independent of plan, desire for control and other factors. Only those who have the courage to take risks can meet the challenges, invest their time, energy and financial resources and bear the possible losses 2. Alertness is also called entrepreneur early warning, which is used to reflect the ability of entrepreneurs to find out whether market opportunities exist or whether they have value. When one person has insight into the value of a resource while others don't, the warning has already appeared
Internet plus is an outdated word. Who is still talking about this word? p>
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the half hanging teacher in Colleges and universities, who couldn't find a good job in those years, was reluctant to bear hardships and went to the school to be a teacher, and then gave all kinds of advice, which is called "mistaking the children". What kind of entrepreneurship competition is also a laughing matter. All kinds of old ideas are on the table. They have no experience in social work. How can they talk about entrepreneurship? Of course, colleges and universities also have strong teachers, or academic strong, they will not talk about entrepreneurship with you. Either I have worked outside for a long time, worked as a leader, and become a teacher; Another is to realize financial freedom early. What the three groups do not do is Internet plus, because the word is out of date. p>
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ZF officials declined to comment
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Why do I say this word is out of date? Go and see what is the hot field of venture capital, that is, the so-called tuyere
1, AI, has been fried for many years. This year,
2 is specially
2 and share the economy. Now it is in the red sea state. It can be regarded as the Internet Plus +
3, block chain technology
4, lithium battery and new energy vehicle, and is beginning to mature. p>
5. Fintech, Alibaba has long said that it is not engaged in Internet finance, but copied a foreign word, called financial technology company
the level of judges in the entrepreneurship competition is too low. Even if college students win the championship in the competition, they are in the wrong direction
if you want to start a business competition, you have to invite angel investors, PE, VC, at least those who have been in these companies, or else you are going to have a family
distinguish blockchain from ordinary database;, The main point is that the specific rules for putting data into the database are different. In other words, it can not conflict with other data already in the database. It is only added, immutable, and the data itself is locked to an owner (which can be owned). It is replicable and available. Finally, everyone agrees that the state of data in a decentralized database is compliant.
(1) participants can join freely without permission; (2) the contents of the database are open to all participants; (3) all the previous transaction data, that is, the logs of the database, will never be deleted; (4) highly rendant and reliable; (5) inefficient, requiring multiple confirmations, in order to think that the transaction is really completed
in the future, jinwowo will be based on the instrial layout, We will apply blockchain, an emerging technology, to all sectors of the society to promote big data to serve the society better and more efficiently.
1 Stability: insulated conctors are more stable than uninsulated conctors. Sometimes the current of uninsulated wire will be interrupted, so the insulated wire will not have this problem
2 Transmission speed: the transmission speed of different materials is different, among which the glass fiber wire and EU detection / shunt wire are the fastest, and the tin wire is the slowest
3 Rarity: tin wire or copper wire is usually used in the early stage, because these two kinds of ore are relatively easy to find. Glass fiber wires are recommended for creation mode, and gold wires or better wires are recommended for long-term survival
extended data:
high voltage conctor is a kind of ultra-high voltage transport cable with large loss. It can withstand 2048eu / T voltage. One grid loss is 1 EU / T. Close to uninsulated high voltage will cause 4 damage per second. You can build a cheap defense system
The 2x insulated gold conctor is a medium voltage transport cable with large loss. It can withstand 128eu / T voltage. 25 grid loss 1 EU / T, average loss of 0. 4EU/t Mainly used for storage box and other medium voltage power equipmentmainly used for high voltage power equipment such as advanced storage box. Synthesis of high voltage wire: 12 high voltage wires can be synthesized by placing 3 refined iron ingots side by side. You know, red stone is a very important component in my world. It can connect all kinds of wires, torches, control rods and other things needed in the game, so it is an essential thing