Blockchain engineering maintenance

1. Compared with the traditional centralization scheme, blockchain technology has the following three characteristics:
1) the core idea of blockchain is decentralization
2) the biggest subversion of blockchain lies in the establishment of credit
3) the collective maintenance of blockchain can rece the cost.
in a word, blockchain touches money, trust and power, which are the fundamental basis for human survival.

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3.

From the current mainstream blockchain projects, blockchain projects are mainly divided into four categories: the first category: currency; The second is platform; The third category: application category; The fourth type: asset token

currencies mainly act as the "exchange media" in the field of blockchain assets, and the exchange media refer to general equivalents, such as gold and silver bills in the past< (currency exchange on trading blockchain assets)

platform projects refer to the establishment of technical platforms to meet the needs of various blockchain application development, which can rece the threshold of application development on blockchain

application projects cover a wide range of fields, including finance, social networking, games, property rights protection, etc., and are also the fastest growing fields of blockchain assets

asset token project refers to the blockchain mapping of physical assets, that is, the physical assets on the chain. At present, there are no more than 10 varieties

01 currency

the first category is currency project, which is also the earliest blockchain project. Currency projects mainly include bitcoin and lightcoin. In addition, there is another kind of asset with the characteristics of anonymity. Its main functions include protecting the privacy of both sides of payment while realizing payment. The well-known ones are dash, monero and zcash. Currency is mainly used as the "exchange medium" in the field of blockchain assets. The exchange medium is the general equivalent you use to exchange goods. For example, gold, silver and silver bills can be used as the exchange medium in the past. At present, there are more than 2100 types of digital assets in the world, and the number of currency blockchain projects has increased rapidly recently. As of June 2018, bitcoin is still the largest market value

02 platform type

the second type is platform type blockchain project. The main function of platform type blockchain project is to establish a technical platform to meet the technical requirements of various blockchain application development; In short, platform applications allow developers to directly issue digital assets and write smart contracts on the blockchain. Smart contract is a computer program running on the blockchain database, which can be automatically executed under the conditions of its source code setting

for example, you develop a smart contract based on the house rent protocol on the blockchain. When the owner receives the rent, it will trigger the automatic execution and give the security key of the apartment to the tenant

the main function of platform blockchain projects is to establish the underlying technology platform, so that developers can do application development on the underlying technology platform. A considerable number of platforms are still in the development state. As of June 2018, Ethereum has the largest market value

03 application

the third category is application blockchain projects. Application projects are blockchain projects based on blockchain development platform (such as Ethereum), which can solve many problems in various fields of the real economy

for example, augur, Golem, vechain, omisego, which provides asset exchange and transfer services. Using blockchain technology, these projects can better solve the problems of trust and cross-border circulation. At the same time, using smart contracts and tokens on the blockchain, they can better realize automatic execution and greatly improve the efficiency of social and economic activities. Application blockchain projects cover a wide range of fields, including finance, social networking, games, property rights protection and so on. It is also the field with the fastest market value increment of blockchain projects at present

04 asset token

the fourth category is the asset token blockchain project. Asset token refers to linking the blockchain assets to physical assets such as gold and US dollars, which is the blockchain mapping of physical assets. As of February 2018, there are no more than 10 varieties. The typical representatives are usdt against US dollars, digix Dao against gold, Digix each token represents 1 gram of Gold Certified by the London Bullion Market Association. Asset token has the advantages of convenient transaction and safekeeping. First of all, asset token is more convenient for transaction. Because blockchain assets can be split, it has better liquidity

for example, at present, real estate needs to be transferred as a whole. If the real estate can be token, it can be split and purchased, which is more convenient for transaction. Secondly, the token of physical assets is more concive to custody. Gold is easy to wear out and cause losses in physical transactions, but there is no need for physical transfer after the token of physical assets, which is more concive to the custody of physical assets

4. As we all know, there are many blockchain projects. The common ones are: mobile phone mining, digital currency development (token), digital currency exchange, digital currency wallet, blockchain mall, blockchain pet cultivation, blockchain games...
blockchain development needs to be determined according to the development methods and functions. Customized development is expensive, and it will be very expensive if there are many and complex functions, Therefore, this specific price can only be expressed in a specific scheme.

5. To help prevent novel coronavirus pneumonia, we should do a solid job in "six stability", fully implement the "six guarantees" task, and promote employment and expand jobs. Recently, the joint supervision and Administration Bureau of the Ministry of human resources and social security and the National Bureau of statistics have released a number of new occupation to the society recently. Including: "blockchain engineering and technical personnel", "urban management grid member", "Internet Marketer", "information security tester", "blockchain application operator", "online learning service engineer", "community health assistant", "ability evaluator for the elderly" and "additive manufacturing equipment operator". This is the third batch of new occupations issued since the promulgation of the people's Republic of China occupational classification dictionary (2015 Edition). In addition, five types of work, such as "live broadcast salesman" and "Internet information auditor", were released, and three types of work, such as "epidemic prevention", "disinfector" and "public health administrator" under the occupation of "public health assistant attendant", were upgraded to occupation
the Ministry of human resources and social security collected the new jobs from the public, organized the experts to evaluate and demonstrate the new jobs in strict accordance with the principles, standards and proceres of job classification, and publicized them to the public through Internet media. The new occupation occupation mainly involves novel coronavirus pneumonia areas, and the new format of adapting to the needs of employment and Entrepreneurship of graates. It also has the following characteristics to help the poor and the rural transfer workers. Second, the development of Internet technology has given birth to a variety of entrepreneurship and employment models; Third, the development of information technology puts forward new requirements for network credit and security
What do the two new blockchain professions do
in the notice on releasing professional information of blockchain engineers and technicians on the website of the Ministry of human resources and social security, the specific definitions and main tasks of blockchain engineers and technicians and blockchain application operators are defined
blockchain engineers and technicians refer to those engaged in blockchain architecture design, underlying technology, system application, system testing, system deployment, operation and maintenance. Main tasks:
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4. Design and develop blockchain performance evaluation indicators and tools
5. Handle the deployment, debugging, operation management and other issues in the application process of blockchain system
6. Provide blockchain technical consultation and services
blockchain application operator refers to the personnel who use blockchain technology and tools to engage in the application and operation of government affairs, finance, medical care, ecation, pension and other scene systems. Main tasks:
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4. Test the function, safety and stability of the system
5. Operate the system application on the blockchain service platform
6. Engaged in the monitoring, operation and maintenance of system application
7. Collect and summarize the problems in the application operation of the system
it is reported that the Ministry of human resources and social security, together with relevant departments (units), is accelerating the development of professional standards for new occupations, standardizing the practice of practitioners, comprehensively improving the quality and skills of practitioners, and laying a solid foundation for the construction of skilled talents.

6. The characteristics of collective maintenance in blockchain technology are: blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. The so-called consensus mechanism is a mathematical algorithm to establish trust and obtain interests between different nodes in the blockchain system. The characteristic attributes include decentralization, openness, autonomy, tamper proof and anonymity.

7. Chongqing jinwowo analysis: under the centralized network system, the maintenance and operation of the system depends on the operation and operation of the data center and other platforms, and the cost cannot be omitted
the nodes of blockchain
can be participated by anyone. Each node can verify the correctness of the results of other nodes' records while participating in the records, which improves the maintenance efficiency and reces the cost.

8. < UL >

the underlying development of blockchain can't be realized with Java

as the upper development, you just need to dock according to the given open source interface, and then develop what you need with the language you are good at

now there are many blockchain system templates, you can see which development cases

< / UL >

9. My hometown is in a beautiful small village in the town. Although it is not as majestic as Mount Tai or as fiery as the maple leaf in Xiangshan, it has beautiful scenery that people yearn for
it's an asphalt road from the county town to my hometown. On both sides of the road, there are many colorful wild flowers, sending out charming fragrance. Behind the small wild flowers, there are thick pine trees, which are luxuriant and evergreen all the year round
next to the pine forest, there is a golden paddy field. When the rice is mature, it lowers its head heavily. The autumn wind blows slowly, and the rice turns up layers of waves. The paddy field suddenly becomes a golden ocean, which is extremely beautiful. In the orchard, the pear full of branches and trees makes people drool at a glance; Water Lingling is the grape, big string of hanging full of shelves, pick one into the most, sour, sweet
a winding river flows through the field like a milky ribbon. There is a small bridge on the river. Looking down from the bridge, the river is clear to the bottom, and the sand and stones at the bottom are clearly visible. The water in the river is flowing continuously, and the sound of "Hua La Hua" seems to be playing a beautiful symphony, which makes people relaxed and happy
around the small village, there is a dense bamboo forest. The leaves of bamboo are oval, thin and long. The green leaves are so fresh and tender. The misty water sprinkles on the bamboo leaves and becomes rolling pearls. The bamboo leaves look green and green, and they are like small green swords made of jadeite. Wisps of breeze blowing, make the air here more fresh and fragrant, bamboo issued a rustling sound, like a girl's whisper, very good-looking
my hometown is so beautiful, I love my hometown! In fine fig flowers, the brightness dazzles the eyes. The warm sunshine is shining on them, and it looks dazzling. Then it smells of flowers with simple soil smell, which makes people energetic.
walking down the country road, it's a beautiful and clear pond. I sat on the big stone bench and enjoyed the charming landscape painting in front of me. Behind the big pond are high mountains. They are like the guardians of their hometown. They stand in their hometown and hold their heads high. Look, how heroic! There is an old and strong banyan grandfather around the big pond; There is a tall and powerful uncle pine; There are gorgeous and gentle Bauhinia flowers; There is also the petite and lovely sister Jasmine... So many kinds of trees, flowers and plants form a harmonious family. The big pond is my favorite view. Leaves and petals falling from big trees float on the clear water, which adds a lot of color to the big pond. And in the clear and bright water, there are all kinds of fish raised by farmers. They are swimming, playing and dancing in the water, with a sweet smile on their face. When everyone sees the beautiful scenery, their worries will disappear
everything in my hometown is so simple and natural. I love my hometown! I was moved by the simple beauty of my hometown.