Ethereum builds alliance

1.

what is Ethereum:

Ethereum is an innovation based on the application of technologies and concepts in bitcoin to computers. Ethereum itself imitates a lot of bitcoin technology to maintain the computer platform. blockchain technology is one of them
Ethereum platform can safely run any program users want

advantages of Ethereum over other competitive currencies before Ethereum appeared, some digital currencies imitated bitcoin. However, these projects have their own shortcomings, they can only support one or several specific applications at the same time< However, the reason why Ethereum can surpass the limitations of these projects in the past is because of the core idea of Ethereum

what Ethereum wants to implement is a blockchain protocol with built-in programming language. Since it supports programming language, in theory, any blockchain application can be defined with this language, and then run on Ethereum's blockchain protocol as an application

The design of Ethereum is very flexible and adaptable

Ethereum target sets the advantages of blockchain technology, in order to add the advantages of blockchain, such as decentralization, openness and security, to almost all computing fields

blockchain applications of Ethereum

Ethereum has many blockchain applications, such as digital applications of gold and stocks, financial derivatives applications, DNS and digital authentication, etc

Ethereum has achieved more than 100 blockchain applications by many start-ups

Ethereum has also been closely watched by some financial institutions, banking consortia (such as R3), as well as large companies like Samsung, Deloitte, RWE and IBM. As a result, a number of blockchain applications such as simplified and automated financial transactions, merchant loyalty index tracking, and gift cards designed to achieve decentralization of electronic transactions have emerged

the relationship between Ethereum and blockchain:

Ethereum is a programmable blockchain

Ethereum does not give users a series of preset operations (such as bitcoin transaction), but allows users to create complex operations according to their own wishes

in this way, Ethereum can be used as a platform for various types of decentralized blockchain applications, including but not limited to cryptocurrency

like other blockchains, Ethereum also has a peer-to-peer network protocol. Ethereum blockchain database is maintained and updated by many nodes connected to the network. Each network node runs the Ethereum simulator and executes the same instructions. Therefore, people sometimes call Ethereum "world computer"

2. Many blockchain projects are developed on the basis of Ethereum's open source technology. Ethereum is a common public chain technology, and the deployment of applications on Ethereum has high requirements for developers. Developers need to consider many technical details and business processing logic, as well as security vulnerabilities such as smart contract overflow
the trust union credit alliance chain is located in the financial public chain, which is oriented to the high-frequency financial application scenarios in the field of credit and assets. It does not use eth, EOS, Neo and other general public chains, but uses the account structure of star network, adopts the lightweight intelligent contract layer, and the whole technical architecture is molarized according to "high aggregation and low coupling", This enables the trust union credit alliance chain to adapt to the requirements of rapid development, rapid implementation and timely response of Internet financial procts.

3. At the top of Ethereum is DAPP. It exchanges with the smart contract layer through Web3. JS. All smart contracts run on EVM (Ethereum virtual machine) and use RPC calls. Below EVM and RPC are the four core contents of Ethereum, including: blockchain, consensus algorithm, mining and network layer. Except DAPP, all other parts are in the Ethereum client. The most popular Ethereum client is geth (go Ethereum)

4.

Ethereum is an open source public blockchain platform with smart contract function. It provides decentralized virtual machine (Ethereum virtual machine) to process point-to-point contract through its special cryptocurrency ether (also known as "Ethereum")

The token on the

blockchain is called ether, and the code is eth. It can be traded in many foreign exchange markets of cryptocurrency, and it is also the medium used to pay transaction fees and computing services on Ethereum

the concept of Ethereum was first proposed by vitalik buterin, a programmer, from 2013 to 2014, inspired by bitcoin, with the general meaning of "next generation cryptocurrency and decentralized application platform", and began to develop through ICO crowdfunding in 2014. As of February 2018, Ethernet is the second highest cryptocurrency in market value, second only to bitcoin

extended data:

Ethereum platform has no characteristics and value. Like programming languages, it's up to entrepreneurs and developers to decide what to use. However, it is clear that some application types benefit more from the functions of Ethereum than others. Ethereum is especially suitable for those applications that automatically interact directly between points or promote group coordination activities across networks

for example, coordinate the application of point-to-point market, or the automation of complex financial contracts. Bitcoin enables indivials to exchange money without the help of financial institutions, banks or governments. The impact of Ethereum may be more profound

in theory, any complex financial activities or transactions can be automatically and reliably carried out on Ethereum with coding. In addition to financial applications, any application scenario with high requirements for trust, security and persistence, such as asset registration, voting, management and Internet of things, will be affected by Ethereum platform on a large scale

5. The first part: build your own blockchain directory from 0 to 1:
1.1 start with imitation, First knowledge of blockchain
1.2 basis of blockchain: analysis of consensus mechanism
1.3 design principle and method of consensus mechanism
1.4 how to quickly clone a blockchain
1.5 how to turn bitcoin into its own private chain - bifurcated bitcoin
1.6 how to turn Ethereum into its own private chain - bifurcated Ethereum
1.7 how to turn ripple into its own private chain - bifurcated Ripple
1.8 how to turn stellar into a private chain of its own, How to develop your own blockchain wallet (windows and MAC) 1.11 how to develop your own blockchain wallet (Android and IOS) 1.12 how to develop an online wallet similar to blockchain.info 1.13 how to increase the security and robustness of your own blockchain network 1.14 how to use coin to handle recharge withdrawal business
1.15 How to use the fund pool to build a mixed currency service
1.16 how to design a new mining algorithm
this process is generally used, but it is also very difficult for ordinary people to complete. The mature projects of blockchain include Ethereum, decent, bitcoin and so on.

6. Build / env.sh go run build / ci.go install. / CMD / geth
make: * * [geth] error 1
there is no such directory, or the directory has insufficient permissions

7. Ethereum has established a programmable and Turing complete blockchain. On this blockchain, you can realize the proction of all kinds of digital assets through a simple program, and you can also accurately control the status of the blockchain assets circulating on Ethereum by writing a program, such as whether the asset is to be paid or locked or has a quota, whether the account is a treasure list or a white list Ethereum and other digital assets, etc. At the same time, Ethereum is a programmable, flexible and complete blockchain network foundation. On this basis, we can realize more functional procts of non regional fast chain assets. For example, I use Ethereum to set up smart contracts, which can be applied in personal daily economic life and enterprise economic activities. Ethereum is a new and open blockchain platform based on the concept of blockchain and blockchain assets. It allows anyone to build and run decentralized applications on the platform by using blockchain technology. In short, Ethereum technology is blockchain technology plus smart contract.

8.

Hashtoken alliance

The full name of

GHP is global hash power. It is a global computing alliance formed by global bitcoin miners and established the Computing Alliance Foundation. Based on Ethereum erc2.0, it has a total circulation of 10 billion tokens, of which 5 billion are locked up for a long time and 50 million are in circulation

GHP provides bitcoin computing power by miners. Around the bitcoin computing power instry chain, it builds mines, mining, mining machine proction, computing power mall, computing power wallet, mine pool, computing power game, etc., and realizes computing power asset securitization

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< H2 > extended information:

global hash power hash pass and ZT exchange have reached a strategic cooperative relationship. Global hash power hash pass (GHP) is scheled to launch zt.com digital currency exchange in the near future, and open GHP / eth, GHP / CNT trading pairs. At that time, ZT exchange will simultaneously open the currency charging function of global hash power hash pass (GHP)

relying on stable, professional and reliable technical support, ZT exchange has built a trading platform for blockchain digital currency, which is the most convenient to buy money and has the most convenient proceres, so as to truly meet the needs of global users. The operation performance of the exchange is also very stable, with real-time comparison of trading information, elastic flow protection and efficient order matching engine

9. The professional casing manufacturers proce and process casings according to API Spec 51988 and SY / t6194-96
there are 10 grades of steel procts: H40, J55, K55, N80, C75, L80, C90, C95, P110 and q125
proction range: oil casing
4-1 / 2 & quot
to
20 & quot
(usually seamless pipe)
button type: BTC, LTC, STC
for N80 casing, the manufacturer's proction length is R-1 (4.88-7.62m), R-2 (7.62-10.36m) and R-3 (10.36m-longer)
the surface defects of unqualified N80 casing include fish scale fold, slag inclusion fold and slag pit. When choosing the cooperative manufacturer, we should pay more attention to the time and place of the manufacturer
through negotiation between the manufacturer and the demander, submerged arc welded straight seam pipe can be used for large diameter casing (diameter greater than 508mm) used to transport natural gas, gas, oil, water and other liquids and gases
in order to rece the cost, improve the safety and prolong the service life of the casing of the demander, the type of pipe end buckle can be selected as long round thread, partial trapezoidal thread, short round thread and special buckle. The Demander shall specify the type of pipe end buckle in the contract when selecting< The mechanical properties control requirements of N80 raw materials selected by the manufacturer:
in order to make the mechanical properties of N80
grade (36Mn2V)
hot rolled seamless tube meet the API requirements, it is stipulated that the continuous casting slab is heated evenly, the starting rolling temperature is controlled at 1150 ~ 1220
℃, the rolling rhythm is well controlled, and the finishing rolling temperature is 920 ~ 950
℃< N80 oil casing pipe is a kind of seamless steel pipe with high strength and toughness.
the commonly used methods in the world are as follows:
quenching and tempering (including direct quenching and tempering after rolling), normalizing, normalizing +
tempering and tempering after rolling
36Mn2V
is a special steel for N80
grade oil casing, which belongs to microalloyed non quenched and tempered steel. The steel is suitable for processing by temperature control, cooling control and deformation control. The steel pipe can achieve the required performance without quenching and tempering, thus simplifying the proction process and recing the manufacturing cost of steel pipe
the demander's conversion of common units in the inquiry sheet of casing manufacturer: outer diameter 25.4mm = 1in, weight 1.49kg/m
= 1lb / ft, length 1m = 3.28ft.