π社区 区块链,区块链社区是干嘛的

近年来，随着区块链技术的发展，区块链社区的应用也越来越广泛。π社区作为一个区块链社区，在帮助用户更好地了解区块链技术方面发挥着重要作用。

首先，π社区提供了一个完善的区块链学习环境，拥有大量的区块链技术资讯，可以帮助用户快速了解区块链技术，从而让用户更好地参与到区块链领域中来。

其次，π社区还提供了一个完善的交流平台，用户可以在这里讨论区块链技术相关的问题，可以帮助用户更好地理解区块链技术，也可以更好地解决用户使用过程中遇到的问题。

此外，π社区还提供了一个完善的区块链应用学习环境，用户可以在这里学习如何使用各种区块链应用，从而让用户更好地参与到区块链领域中来。

总之，π社区是一个完善的区块链社区，可以帮助用户更好地了解区块链技术，更好地参与到区块链领域中来。π社区的出现，为用户提供了一个完善的区块链学习环境，为区块链技术的发展贡献了自己的一份力量。

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❶ Yuhang District F Category Talent Recognition Guide! Attached are the certification conditions and certification process!

_ Recognition conditions Talents working in Yuhang District who meet one of the following conditions can apply for certification of Category F talents in Yuhang District. 1. Key management and technical talents whose salary income in the previous year was not less than 350,000 yuan from above-regulated enterprises (excluding the real estate industry), national high-tech enterprises, or enterprises founded by high-level talents at or above the municipal level from Shanghai and abroad; 2. Technical backbones of the companies in the district selected into the "Hangzhou Unicorn Enterprise List" and "Hangzhou City Companies with Over 100 Million US Dollars (Quasi-Unicorn) List" and have worked in our district for more than one year; 3. In Talents with a bachelor's degree or above who have worked in enterprises in the zone for one year and have obtained one of the following professional and technical achievements: Obtained relevant authorized patents in the blockchain industry (top 2 inventors), and published blockchain-related academic papers in core domestic and foreign journals Thesis and obtain the corresponding professional qualification certificate; 4. The first prize winner of the Yuhang District Science and Technology Progress Award (the first 3 finishers); 5. Talents with deputy senior professional and technical position qualifications; 6. The provincial "151" who passed the comprehensive evaluation Candidates for the third level of the "Youth and Middle-aged Training Program", candidates for the third level of the city's "131" Youth and Middle-aged Training Program; 7. Talents with senior technician professional qualifications; 8. Obtained a master's degree abroad, started a business abroad or worked continuously after graduation Talents with more than 3 years of experience; master's degree graduates from the top 100 universities in QS; 9. First place winner of the team competition of the "Hundred Lines, Hundred Craftsmen, Hundred Competitions" elite competition (other contestants other than the main person in charge, no more than 3 person), the second and third place winners in the individual competition; 10. Leading talents in urban and rural community work, social work and social organizations at or above the district level; 11. Possessing the professional qualification certificate of a social worker, and being a social worker at or above the district level The main person in charge of a social organization (including the legal representative, chairman, and secretary-general) who has an organizational legal person level of 3A or above and undertakes public service projects of more than 1 million yuan in Yuhang District annually; 12. Those who have been identified as having intermediate qualifications in the two new organizations Party worker; 13. Mercedes-Benz Future Star Award, winner of Zhejiang Province’s Top Ten Industrial Design Awards; 14. Shanghai International Film Festival Animation Award, Changzhou International Animation Week Animation and Comic Award, State Administration of Radio, Film and Television’s various awards Animation Award, National Ministry of Culture and Tourism Various Animation and Comic Awards, Busan International Film Festival Cartoon Award and other creative staff (screenwriters, directors, original painters, animators, comics and illustration authors); 15. "China Gold Medal of Rising Star Cup Story-based Original Comic Contest; 16. German IF Award (excluding Concept Design Award), German Red Dot Award (excluding Concept Design Award), American IDEA Award, Japanese GMARK Award Grand Prize, DIA China Design Intelligent Manufacturing Award Winner of the Intelligent Intelligence Award, TIA Design Award; China Excellent Industrial Design Award Excellence Award, China Innovation Design Red Star Award Most Creative Award and Red Star Original Award Silver Award and above, China Industrial Design Original Award Silver Award winner; 17. Guanghua Longteng Award - Top Ten Outstanding Young People in the Design Industry of Zhejiang Province; 18. Third Prize Winner of China Construction Science and Technology Award (top 3 finishers);19. Winner of the third prize of the National Green Building Innovation Award (top 3 finishers); 20. Winner of the "West Lake Cup" (Construction Engineering) Award for the Hangzhou Construction Project; 21. Winner of the third prize of the National Agriculture, Animal Husbandry and Fishery Harvest Award Winners of the Provincial Agricultural Technology Extension Contribution Award (top 3 finishers); Winners of the second prize of the Provincial Agricultural Harvest Award (top 3 finishers); Winners of the second prize of the Provincial Department of Agriculture Technology Progress Award (top 3 finishers) Completer); Winner of the first prize of Hangzhou Agricultural Harvest Award (top 3 finishers); 22. High-level technician engaged in agricultural production; Chairman of the national-level demonstration professional cooperative; 23. In ecological agriculture, Operations and management talents in the fields of leisure agriculture, smart agriculture, etc., with outstanding performance, strong radiating power and annual sales revenue of more than 30 million yuan for two consecutive years (the main person in charge is the B&B legal person or manager, and each B&B is limited to one person); The main person in charge of the operation and management of Zhejiang Province-level B&Bs (Platinum, Gold, and Silver), Hangzhou Municipal Four-flower, and Five-Hua honors (the main person in charge is the B&B legal person or manager, and each B&B is limited to one person); 24. The third prize winner of the national “Liang Xi Forestry Science and Technology Award” (top 3 finishers); 25. The second prize winner of the provincial “Science and Technology Forestry Award” (top 3 finishers); 26. Dayu Winner of the third prize of the Water Conservancy Science and Technology Award (top 3 achievers); 27. Winner of the second prize of the Provincial Water Conservancy Science and Technology Progress Award and Science and Technology Innovation Award (top 3 achievers); 28. Outstanding achievements in philosophy and social sciences in Hangzhou Winner of the second prize of the Award (the first person to complete the project); 29. ​​Zhejiang Province Philosophy and Social Sciences Special Project Outstanding Achievements Project (the first person to complete the project); 30. Hangzhou City Philosophy and Social Sciences Planning Project Outstanding Achievements Project (the first person) Completer); 31. Candidates who have passed the comprehensive evaluation of the Hangzhou Social Science Outstanding Young Talents Training Program; 32. Outstanding achievements in projects established by the Party School of the Zhejiang Provincial Party Committee (Zhejiang Administration College) and Zhejiang University of Socialism (the first completer ); 33. Among the parks (incubation platforms) that have won honors such as provincial incubators and national-level maker spaces, the annual wage income (wages, salaries, equity dividends, etc.) is not less than 350,000 yuan. Management talents; 34. Main persons in charge of e-commerce companies that have made particularly significant contributions to our region (top 20) (in principle, each company applies for one, and multiple companies under the name of the same actual controller are regarded as one company) ;35. Zicongna, a live broadcast e-commerce enterprise that pays tax of more than 500,000 yuan, can identify an exclusive contract anchor (annual sales of more than 10 million yuan); 36. A third-level lawyer and a judicial administrative department at or above the provincial level or lawyers association at or above the provincial level. 37. Selected into the national foreign-related lawyer talent pool; 38. Obtained as a municipal five-star instructor; 39. District-level intangible cultural heritage inheritor; 40. Coaches whose athletes have won the title of athlete or above. Member; 41. District (county) level subject leader; 42. Prefecture-level key teachers; 43. Prefecture-level medical rookie; 44. Yuhang District grassroots famous doctor; 45. Yuhang District famous nurse; 46. Equivalent to Category F Level leading talents. _ Application process 1. The employer logs in to the "Yuhang Human Resources Service System"; 2. Enters the application system, clicks on the "Online Service Hall", and selects "Yuhang District High-Level Talent Classification Recognition Application"; 3. Fill in the relevant information; 4. Upload relevant testimonial materials; 5. Wait for review by relevant departments.

❷ Project evaluation DIA: Oracle system focusing on the Defi ecological field

Now I will make an evaluation of this project so that everyone can have a comprehensive understanding of DIA.

1. Project establishment analysis (A)

Blockchain can safely and transparently interact on the chain through smart contracts. But blockchain is not a utopia divorced from reality. Blockchain ultimately needs to interact with real-world data.

In many scenarios on the blockchain, smart contract applications must obtain off-chain information sources and interact with data inside and outside the chain in order to trigger their logical judgments. For example, decentralized trading market systems on the blockchain, decentralized insurance systems, various prediction market systems, instant compensation systems for delayed flights, etc. all need to obtain real-time off-chain real data in a timely manner to trigger the execution of smart contracts. . Smart contracts cannot access off-chain data on their own, so they refer to some external data source.

We call the information bridge between the chain (blockchain) and off-chain (real world) oracles, through which information can be transferred from off-chain to on-chain. , convey real-world information and interact with the blockchain.

If there is no oracle, the transmission of information will not be realized, and the large-scale integration and application of the blockchain into the real world will not be achieved, which hinders the implementation of the blockchain. Oracles are indispensable middleware in the blockchain field and are the "intermediaries" that connect a large number of blockchain smart contracts to real-world data. There will be tens of billions of dollars of space in the future.

DeFI, which has become popular in recent years, also requires secure middleware to connect to on-chain and off-chain data. Because the entire distributed ecosystem relies on oracles and its demand for data grows exponentially, the entire application is exposed to oracle vulnerabilities.

Currently, the oracle project with the largest share and highest market value on the market is Chainlink, which once entered the top ten in market value. The decentralization of LINK mainly relies on token economic incentives and reputation systems to establish a virtuous cycle ecosystem. System, the triggering of the oracle needs to be realized through transfer. The disadvantage is that all votes are taken on the chain, resulting in higher gas fees.

In addition to Chainlink, traditional decentralized oracle projects include DOS, Tellor and Band, etc. Their technical logic is similar. Most of them collect data off-chain and verify on-chain. The core problem of this type of oracle is that verification relies on a third party.Weak resistance to attack. Some time ago, a company called Zeus Capital released a 60-page short-selling report on Chainlink, pointing out that LINK nodes are centralized, opaque, and have problems with the economic model of the token.

The main oracle products currently on the market are largely opaque, inconsistent, inaccurate and difficult to expand, which are incompatible with the security, transparency and other values ​​represented by DeFI. An oracle project that truly adapts to the DeFI field and can provide data support for decentralized finance is imminent.

2. Technical Features (BBB)

The DIA introduced today is exactly the project that can solve the problems of existing oracle machines. DIA’s official website introduces it this way: an ecosystem of open financial data in the financial smart contract ecosystem.

DIA’s goal is to enable data analysts, data providers and data users to use the platform’s functionality together. DIA establishes a reliable and verifiable bridge between off-chain data from various sources and on-chain smart contracts, which can be used to build various financial dApps. A simple understanding is that DIA is an oracle system specially built for the DeFi ecological field.

The model of the oracle machine is relatively simple. The core has two aspects. On the one hand, it is how to decentralize the authenticity of the data obtained, and on the other hand, it provides incentives for users who submit high-quality data.

As mentioned before, Chainlink, the current leading oracle machine, uses work order allocation and collaboration between on-chain contracts and off-chain distributed nodes, through reward and punishment mechanisms, reputation contracts and aggregation models. (aggregating data from multiple data sources) to perform data requests and feedback. However, the data obtained in this way does not have strong security endorsement. The core reason is that if the uploader conspires to do evil, there will be a certain delay in being punished, and the data has already been put into use, and everything is too late.

The operation steps of the DIA system are as follows:

1. The data collection mechanism directly obtains collected data from various sources such as exchange APIs and public sources.

2. The data is hosted on the DIA server and hashed and encrypted on the chain. The method source code and scraper code are recorded on Github. Push is available via API and oracles. Multi-party games set up a strong reward and punishment system, so that prices are formed on the chain. This is a fact that miners generate through games. The database layer can flexibly handle a variety of different types of data flows, from high-frequency trading APIs to never-changing and accessible data in high-performance key-value stores.

3. Distributed financial protocols and index providers and other parties can directly access the data flow and use DIA’s restAPIs and Oracle systems to distribute collected and aggregated data.

The working principle of DIA mainly includes five aspects: data request, data submission, verification, data storage and data access through Oracle or API. DIA oracles that apply this model have better decentralization, more realistic data, stronger stability, and higher attack costs.

DeFI platforms like MakerDao, Synthetix, Ampleforth and others are particularly vulnerable to oracle vulnerabilities. Since these platforms are envisioned as autonomous financial protocols that cater to a variety of financial needs, they rely heavily on transparent, accurate price oracles.

DIA’s data sources are transparent and publicly accessible to everyone. Market participants can provide, share and use financial and digital asset data, and DIA’s mission is to democratize financial data. Access data directly via API or oracles, connecting DIA directly to computational agents or any other distributed financial (distributed) application.

The DIA platform leverages cryptocurrency’s economic incentive model to acquire and verify data. The DeFI platform will migrate to a transparent and auditable third-party solution to ensure the sustainability of its core products.

3. Token economy and Bonding curve (BBB)

During the entire operation process, DIA can play an important role as a governance token. DIA tokens can be used to fund data collection, data verification, voting on decisions related to the association, and also to incentivize the development of the platform itself, enabling decentralized communities to autonomously run the DIA platform. DIA uniquely meets these needs.

DIA has four functions, namely incentive, verification, governance and value addition.

The community can receive rewards by funding public rewards for data cleaning, development of effective algorithms, discovery of system vulnerabilities, etc.

DIA is currently not listed on the exchange and will start crowdfunding soon. The information of DIA is as follows:

Total circulation: 200 million

Official website: diadata.org

Private placement: 10 million (5%)

Public sale: 30 million coins (15%)

Public sale form: Bonding curve

Here is an introduction to what Bonding curve is. This participation model can be any Anyone can participate in "bonding curve allocation". The joint curve is an innovation in public offering design.New types of, well-designed smart contracts can automatically create DIA markets where the price of each token increases when tokens are purchased from the contract and decreases when sold back. So in effect, transactions are determined by the average price of each token in the transfer batch and the number of tokens on the market. Selling through the bonding curve will provide liquidity on the Gnosis Protocol Mesa DEX.

Start time: 15:00 CET on August 3, 2020 (21:00 Beijing time);

End time: 3 CET on August 18, 2020 point (9 o'clock Beijing time);

Duration: about 14 days

Supported currencies: ETH, DAI, USDC

Initial price: 0.05 USD

Initial supply: 30 million

Restricted countries: United States, Iran, etc.

DIA team will launch on August 3rd, CET The DIA redemption page will be released at 3 pm on Monday (9 pm Beijing time). The redemption link will be published on the DIA token website (https://token.diadata.org/).

You can participate through wallets such as IMTOKEN or MetaMask, and convert ETH and USDT into anchored WETH or USDC in the corresponding exchange interface. It is recommended to exchange for DIA at Balancer DEX. I believe everyone knows this step, so I won’t go into details.

4. Team Analysis (BB)

You can check the DIA team situation through the news on the official website.

1. Michael Weber – Association Chairman

Michael founded Bonsum & Goodcoin in 2014, a user loyalty solution powered by blockchain. The first ever qualitative “Good” digital currency, which was successfully sold in 2016. He is a cryptocurrency veteran and serial entrepreneur who has worked as an investment banker, data analyst and derivatives trader at Nomura Brothers, Switzerland-based InsureTech and German multinational Bertelsmann Michaels, where his expertise has led him to Gained a deep understanding of Germany's financial legal framework and digitalization. Michael is also an active board member of NGO Hostwriter.org and co-founder of bitEasy.

2. Paul Claudius – Association Board Association Director

Paul is also a serial entrepreneur and cryptocurrency investor. He has over 10 years of experience in various strategic matters and international growth initiatives, expanding businesses across Europe. Prior to founding DIA, he was European Director of Berlin-based nu3 Group, transforming multi-million e-commerce businesses into vertically integrated brands. Paul began his career with BNP Paribas Corporate Development in New York and AXA Private Equity in Frankfurt am Main.

Paul is the founder of bitEasy and has advised and invested in several medical technology, IoT and e-commerce start-ups.

3. Martin Hobler – Association Board

Martin is a successful Internet entrepreneur with many years of expertise in marketing, sales and strategy. Martin previously worked as a sports manager in Formula 1 and ATP Tennis, working with Lacoste, Wostenner and other international brands. An internet pioneer, Martin also helped found Berlin-based mobile navigation company Gate 5, which was later successfully sold to Nokia.

Overall, the main members of the DIA team have been working in the blockchain field for a long time and have deep insights into blockchain technology. The team currently has 12 members, and all members are available on LinkedIn, which is highly authentic.

The core members are serial entrepreneurs in the blockchain field and have backgrounds in the financial industry. The DIA team is a team with solid technology and abundant resources in the blockchain and financial industries.

5. Community (B)

The official user community channels listed on Dia’s official website mainly include telegram, Medium homepage, and Twitter.

1.telegram

The Telegram group has 3,430 supporters. The number of supporters is average, and the speeches are relatively active. They mainly discuss the situation of the project ICO.

2. Medium

There are 155 supporters. Although the number is not large, the latest published content is July 29th. The information is updated in a timely manner. The latest article is The main content is how to obtain DIA.

3.Twitter

4.Google Trends

The term "DIADATA" was selected for query, but there is not enough search volume.

The oracle is in the blockThe chain field occupies a hub position. In particular, the main oracle products on the current market are largely opaque, inconsistent, inaccurate and difficult to expand, which is incompatible with the security, transparency and other values ​​represented by DeFI.

DIA’s goal is to enable data analysts, data providers and data users to use the platform’s functionality together. DIA establishes a reliable and verifiable bridge between off-chain data from various sources and on-chain smart contracts, which can be used to build various financial dApps. Anyone aiming to provide accurate information about digital assets or financial markets can obtain highly reliable data from the DIA platform. The core team of DIA are all serial entrepreneurs in the blockchain field, a team with solid technology and rich resources in the blockchain and financial industries. These will provide huge support for the development of DIADATA.

DIA’s solution is to solve this problem by creating a distributed Oracle network. Although the field of oracles has great prospects, it is also difficult to implement. DIA still has problems such as insufficient publicity and low community activity, which need to be further strengthened.

❸ What is the difference between Dapp and App?

DApp is the abbreviation of decentralized application, Chinese distributed APP.
A DApp has backend code running in a distributed peer-to-peer network. The background code of traditional APP runs on a centralized server.
The front-end code of a DApp can be developed in any language, just like a traditional APP. In addition, the front-end code of DApp can be hosted in a distributed storage service, such as Swarm or IPFS.
If an application = front end + backend, because the Ethereum contract is composed of code running in the Ethereum distributed peer-to-peer network, distributed application = front end + contract.
The picture demonstrates a DApp architecture:

We all know that App is a client application, which is the abbreviation of application. DApp is D+App. D is the first letter of the English word decentralization. The Chinese translation of the word is decentralization, that is, DApp is a decentralized application. This is to understand this concept literally. To form a clear, accurate, and necessary concept in your mind, you also need to understand DApp in depth.
Comparing APP, the biggest difference between the two is centralization and decentralization. The app needs to have money first, so it needs financing first; then it needs people, so it can be developed and operated after recruiting all the people. DApp is a product that inherits traditional App and combines the characteristics of blockchain. It is more like a crowdfunding model, a sharing model and a decentralized model.

❹ Is the DIA ecological chain a fake pyramid scheme?

To determine whether it is a pyramid scheme, you need toThe legal connotation of this behavior must be analyzed from a legal perspective. If the following conditions are met, it is a pyramid scheme.
According to the "Regulations on Prohibition of Pyramid Selling":
Article 2: Pyramid selling refers to the organizer or operator developing people by targeting the people being developed based on the number of people or sales performance they have directly or indirectly developed. Calculate and pay remuneration, or require the persons being developed to obtain membership qualifications on the condition of paying a certain fee to obtain illegal benefits, disrupt economic order, and affect social stability.
Article 7
The following behaviors are pyramid schemes:
(1) The organizer or operator, through the development personnel, requires the development personnel to develop other personnel to join, and directs the development personnel to Or calculate and pay remuneration (including material rewards and other economic benefits, the same below) based on the number of people under indirect rolling development, and seek illegal benefits;
(2) The organizer or operator requests to be developed through the development staff Personnel pays fees or pays fees in disguised form by subscribing for goods, etc., to obtain the qualifications to join or recruit other personnel to join, and to seek illegal benefits;
(3) The organizer or operator requires the developed personnel to develop other Personnel join, form an upline and downline relationship, and calculate and pay upline remuneration based on the sales performance of the downline, seeking illegal benefits.
In the "Regulations on Prohibition of Pyramid Selling", the concept of hierarchical relationship is repeatedly mentioned. The hierarchical relationship formed by certain rules is only a phenomenon among many pyramid schemes. It must be combined with the illegal possession of other people's property to be suspected of pyramid scheme.