区块链大会2020,区块链峰会2021
近年来，区块链技术及其应用受到越来越多的关注，并受到越来越多的行业和投资者的重视。为了推动区块链技术的发展，2020年的区块链大会和2021年的区块链峰会将是两个重要的盛会。
2020年的区块链大会将于2020年11月20日在上海举行，是由中国互联网协会、中国互联网络信息中心、中国互联网络安全协会共同举办的一年一度的区块链行业盛会。本次大会将精心组织，集聚全球区块链行业的众多知名企业、机构和专家，就区块链行业的发展、创新和应用等热点话题展开深入的讨论。
2021年的区块链峰会将于2021年3月31日在北京举行，是由中国互联网协会、中国互联网络信息中心和中国互联网络安全协会共同主办的一年一度的区块链行业盛会。本次峰会将汇聚全球区块链行业的众多知名企业、机构和专家，就区块链行业的发展、创新和应用等热点话题进行深入的探讨，推动区块链技术的发展。
2020年的区块链大会和2021年的区块链峰会，将是全球区块链行业的重要盛会，将推动区块链技术的发展。作为全球区块链行业的一员，我们期待着2020年的区块链大会和2021年的区块链峰会，将为区块链行业带来前所未有的发展机遇和激励，为区块链技术的应用和发展做出更大的贡献。
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Ⅰ What is the concept of blockchain
Blockchain is a term in the field of information technology.
Essentially, it is a shared database. The data or information stored in it has the characteristics of "unforgeable", "full traces left", "traceable", "open and transparent" and "collectively maintained". . Based on these characteristics, blockchain technology has laid a solid foundation of "trust" and created a reliable "cooperation" mechanism, which has broad application prospects.
On December 2, 2019, the word was selected into the top ten buzzwords of 2019 by "Biwenqiezi".
Related to blockchain financial applications:
Since 2016, major financial giants have also taken notice and launched blockchain innovation projects to explore the application of blockchain in various financial scenarios. Possibility of applying blockchain technology. In particular, Puyin Group took the lead in pioneering the “blockchain”-based digital currency.
The standard digital currency is an asset that has been identified, evaluated, confirmed, insured, etc. by a third-party organization and written into the blockchain through a rigorous digital algorithm to form a link between the asset and the digital currency. The standard correspondence relationship is called a standard digital currency.
In order to realize the great leap forward development of blockchain finance, in order to promote the new development of China's economy, accelerate the circulation of global assets, and realize the dream of rejuvenation that generations have been striving for, Puyin Group will On December 9, the Puyin Blockchain Finance Guiyang Strategy Release Ceremony was held in Guizhou.
The meeting will discuss the digital circulation of assets through blockchain, the blockchain financial transaction model, and the application of blockchain services and social public industries. This conference will mark the beginning of the application of blockchain finance and the transformation and development of a new financial ecosystem.
II Who can participate in the World Blockchain Conference
Global practitioners can participate in the World Blockchain Conference. According to relevant public information, the World Blockchain Conference welcomes global practitioners to participate, including blockchain developers, investors, entrepreneurs, government officials, lawyers and scholars.
Ⅲ Learn from the Chinese version of the "Messi Conference", can foodies in mainland China become real gold?
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“Macy Conference”
“Macy Conference” may not be It is well known to the public, but in the eyes of academic circles, this is a meeting of great significance in the history of science, known as the "Pioneer Conference of the Third Scientific and Technological Revolution". It is in the regularly held "Massey Conferences" that mathematicians, physicists, sociologists, and semanticists from all over the world have conducted interdisciplinary discussions and cooperation, which has provided the basis for almost all scientific research in the second half of the twentieth century to this day. Major scientific and technological issues have laid the foundation forBase.
"We are in an era of technological explosion, and human society is gradually approaching the 'technological singularity'." Inspired by the mission of the times, the famous economist Zhu Jiaming led his Digital Asset Research Institute on December 17 -On the 18th, the Chinese version of the "Messi Conference" - Blockchain Mathematical Sciences Conference was hosted in Beijing. The conference focuses on exploring and dismantling existing blockchain mathematics paradigms, looking for mathematical fields related to blockchain technology, and combining mathematical tools that can introduce blockchain technology.
As a practical application of blockchain in the catering industry, foodie mainland The product uses a set of algorithm mechanisms based on the "incentive compatibility" theory of game theory to mobilize the enthusiasm of all participants to build an ecosystem. Although this algorithm mechanism has been initially verified, in order to make the theoretical foundation more solid, we have been looking for deeper internal scientific principles.
With admiration for science and the desire for "the most perfect mechanism algorithm in the world", the Chihuahua Continental team studied this area extremely seriously. Blockchain Mathematical Sciences Conference.
01
Can AlphaGo surpass humans? Scientist Zhang Bo said that computers are far behind humans...
Zhang Bo, academician of the Chinese Academy of Sciences
< p>The in-depth analysis of artificial intelligence by Zhang Bo, a computational scientist and academician of the Chinese Academy of Sciences, seems to allow us to see a little bit of the value of "being born as a human being".
Zhang Bo pointed out: "The reason why AlphaGo and Deep Blue can succeed is because chess is a complete information game. If it is complete information, it is It is extremely easy and will definitely surpass humans. Therefore, in Go and chess, machines will eventually surpass humans. It is only a matter of time.
But if It becomes incomplete information, such as playing cards. Now, whether it is four-player bridge or four-player mahjong, computers are no match for humans at all. The reason is incomplete information. The same is true for decision-making. If your decision-making If you are making decisions with complete information, machines will definitely surpass humans. But if you are making decisions with incomplete information, then computers are still far behind humans. But unfortunately, in all decision-making scenariosIt’s all incomplete information, and actual decision-making scenarios are all human. ”
As a senior catering project, Chihuahua Mainland has industry information advantages. No matter how powerful the algorithm is, it cannot be dismantled if it does not know the true cost operation information of the industry. Solve the correct game strategy. Based on this understanding, the Chihuahua Continental team is quite pleased that the algorithm we designed is at least operable.
But we Still not satisfied, we long for ourselves to be better!
02
Only mathematicians can do mathematics? Economist Zhu Jiaming emphasizes the value of professionals in applied fields
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Zhu Jiaming, Dean of the Digital Asset Research Institute
Professor Zhu Jiaming pointed out at the beginning that mathematics gave birth to the development of blockchain. From a practical perspective, Professor Zhu Jiaming also said that blockchain has the possibility to extend the branch of applied mathematics. However, academic discussions have always been cutting-edge. When it comes to practice, Professor Zhu also admitted: "At this moment, what new technologies are there?" Mathematical tools can be effectively combined with blockchain, which is a difficult topic to draw conclusions on. ”
The development of blockchain applied mathematics is not something that only mathematicians can do. There are many precedents in history for professionals in application fields to enter the field of mathematics.
p>
Professor Zhu Jiaming gave an example: "For example, when physicists, aerospace engineers, geologists, biologists, and economists encounter practical problems, they Mathematical tools are input into their research fields, or some new mathematical methods are invented.
Here is an example that seems far away from us but is inspiring, which is the combination of biology and mathematics. The combination of the two gave rise to mathematical biology and biomathematics. These are two scenarios where mathematics and biology are combined.
The difference between mathematical biology and biomathematics is that mathematical biology uses mathematical methods to study biological problems, and biomathematics uses mathematical methods in biology. and form new mathematical methods. ”
It can be seen that blockchain application mathematicsThis path of exploration also requires the efforts of people in the industry. Encouraged by Professor Zhu Jiaming, Chihuahua Mainland, as an explorer of the catering blockchain industry, finally found another historical mission to improve itself - to explore mathematical methods for catering blockchain applications.
03
The Chinese Academy of Sciences is complicated Wang Feiyue, Director of the State Key Laboratory of System Management and Control
Young so fearless, this excited little heart has not yet calmed down, teacher Wang Feiyue’s words about imagination The views are so amazing that we want to go against the grain.
Wang Feiyue, director of the State Key Laboratory of Complex System Management and Control, Chinese Academy of Sciences, vividly gave us a walk through the history of science. When it came to artificial intelligence, he quoted Tao Te Ching.
He said: "Intelligence is divided into three levels. One is algorithmic intelligence, which is our artificial intelligence. It can be written into a program, but it is far smaller than language intelligence. , and the intelligence that human language can express is far smaller than the intelligence we imagined. This is consistent with the Tao in the Tao Te Ching. Later, archaeologists discovered that, alas, these are not two sentences. , should be three sentences, Tao, Tao, very Tao, which corresponds to these three levels."
The Chihuahua Mainland team deeply agrees, We have always had a consensus that under the myth of technology, it is as if there are no people in the world except machines. This is obviously not the case. Several experts at the meeting also pointed out that imagination is the reason why humans will never be surpassed by machines.
In an era when computational intelligence can already perform "self-learning" through "raw data input", the more important role of human beings is to: transcend perception and discover patterns.
According to the requirements of the conference organizer, all experts at this conference need to propose their own "blocks" Chain Mathematical Conjecture”. Many conjectures are very interesting, such as the “small-scale consensus is vulnerable to attack” and the “two-military problem” proposed by Yuan Yong of the Chinese Academy of Sciences. From an industrial point of view, although these conjectures are relatively metaphysical, they are good thinking training.
It’s exciting when we see new practice-based approaches in the industry. For example, Mr. Jia Ke proposed the "two high characteristics of smart contracts": "too many restrictions and high difficulty" and "can be triggered internally and high risk". Through observation of experiments, they found that blockchain can completely abandon "smart contracts", "the functions and implementation logic required for blockchain applications can be triggered externally", "self-certifying storage mechanism" and other phenomena. Based on these methods, complex Internet applications without central servers can be developed.
Associate Professor Ding Xiaowei of Nanjing University’s new attempt at financial derivatives also allows us to see the new power of blockchain in reconstructing financial mathematics.
At this conference, we clearly saw that basic theory is the cornerstone of industrial development, and industrial development is the significance of basic theory. Foodie China is changing the catering industry for the better. This is the best result of basic theories such as blockchain mathematics.
IV “2020 The list of "Top 50 Global Blockchain Innovations" was released at the WAIC Blockchain Theme Forum
On July 10, the "Top 50 Global Blockchain Innovations 2020" was held at the World Artificial Intelligence Conference Cloud Summit A major announcement was made on the blockchain theme forum. This selection event lasted for 6 months and went through multiple stages of planning, collection and selection. It was divided into three sections: infrastructure, protocols and tools, and industrial applications. Through a combination of public voting and expert scoring, the "2020 Global "Top 50 Blockchain Innovations".
The list is jointly produced by Professor Gong Yan of the China-Europe Entrepreneurship Camp and Dalu Think Tank, jointly released by the Shanghai Financial Information Industry Association, and first launched by the World Artificial Intelligence Conference Cloud Summit Blockchain Theme Forum.
With the rise of blockchain as a national strategy and inclusion in new infrastructure, the development of blockchain technology has received increasing attention from governments at all levels, and the application of blockchain technology has also extended to digital finance. , Internet of Things, intelligent manufacturing, supply chain management, digital asset trading and other fields.
Since the release of the top 50 global blockchain innovations in 2018, the top 50 lists have been released in Singapore, the Asia-Pacific financial center. In 2020, the release location of the "Top 50 Global Blockchain Innovations 2020" returned to China and was released at the World Artificial Intelligence Conference Cloud Summit Blockchain Theme Forum.
This forum is also the first blockchain-themed forum in the history of the World Artificial Intelligence Conference, bringing together the most influential experts and scholars, research institutions, technical representatives, and leading companies at home and abroad. Focusing on "chain intelligence empowering industries in the future", discuss the globalBlockchain technology and application development status and trends, exchanges on the technological innovation of blockchain companies and their integration practices with cutting-edge technologies such as artificial intelligence and the Internet of Things, and concentrated demonstration of the application results of blockchain technology in different scenarios.
Most projects in this selection adopt a combination of public voting and expert scoring, with the weight of public voting being 30% and the weight of expert scoring being 70%. Since a small number of projects cannot participate in public voting, only expert review methods are used to conduct research selections based on innovation performance.
IV How did the Boao Asia Blockchain Forum commit suicide?
On the morning of May 28, a special actor played Mao Zedong to participate in the 2018 Boao Asia Blockchain Forum The video was forwarded on Moments. The actor said in his speech, "I thank you in the name of Mao Zedong." According to the information introduced by the organizer, the organizing committee includes investment institutions such as Panda Capital, and the event is supported by blockchain media such as Mars Finance. A reporter from the Beijing News learned that Panda Capital, Mars Finance and others issued clarification statements afterwards, saying that they had not participated in the event or cooperated with the forum. At the same time, the organizing committee issued an announcement stating that the actors' comments do not represent the organizing committee, but are just a part of the performance.
According to the "Notice on Prohibiting the Use of the Image of Party and State Leaders for Commercial Promotions" issued by the State Administration for Industry and Commerce, it is prohibited to use and The appearance of images and inscriptions of party and state leaders (including resigned or deceased party and state leaders), as well as any expressions involving the names of party and state leaders; companies are prohibited from using the names and images of party and state leaders to conduct business Any form of commercial promotion activities shall not use the images or inscriptions of party and state leaders (including resigned or deceased party and state leaders), or use special actors to promote products or services in the image of leaders.
Content source Beijing News
VI Ulord was invited to participate in the 6th China Entrepreneurs Conference Blockchain Technology and Application Summit
On the morning of July 19, The 6th China Entrepreneurs Conference grandly opened at the Zhengzhou International Convention and Exhibition Center. With the theme of "New Economy, New Species, New Drivers", this conference covers more than 20 topics including artificial intelligence, big data, new species, Internet+, Internet of Things, blockchain technology and applications, new energy vehicles, and industrial upgrading and transformation. fields. Tens of thousands of entrepreneurs from inside and outside the province were gathered together to discuss industry information and promote the new development of innovation and entrepreneurship in China.
Dr. Liang Liang, Program Director of Ulord, was invited to attend the conference and attended the 6th China Entrepreneurs Conference Blockchain Technology and Application Summit held in the afternoon, meeting with many outstanding blockchain project teams and venture capital institutions to talk about the development of the blockchain industry, and jointly conducted a discussion with the guests present titled "Risks and Opportunities Coexist, How to Choose in the Face of New Species?" 》 roundtable discussion. existFrom the perspectives of investors and entrepreneurial teams, the guests explained how to seize the opportunities in this great change brought about by the blockchain and how to prevent the risks contained in the opportunities.
During the roundtable discussion, Dr. Liang Liang elaborated on the "new opportunities" provided by the Ulord public chain for content creators and disseminators, as well as the "new changes" it has brought to the entire content distribution field. Elaborate. Dr. Liang Liang pointed out that, first, Ulord can solve the problem of rights confirmation in the traditional content field and truly realize "creation means rights confirmation"; second, Ulord solves the problem of middlemen making the difference through blockchain technology and returns the difference. To the original value creators, productivity can be better released through the improvement of production relations; thirdly, Ulord realizes the automatic distribution of income through smart contracts. The Ulord development team has rich technology and experience accumulation. At the same time, the first DApp based on Ulord, Youxiang, has opened for registration and will be launched soon. All concepts can be well reflected in Youxiang.
During the summit, the guests and the audience learned more about the Ulord project through the Ulord promotional leaflet uniformly distributed by the conference affairs team. Volunteers from the Ulord Zhengzhou community also rushed to the summit to call Ulord, and accepted consultations from some blockchain enthusiasts at the scene.
Author and Photography: Ulord Zhengzhou Community Huangdou
Related links:
Ulord’s confidence and future - Dr. Liang Liang, Ulord Program Director, attended Zhengzhou Community Meetup
https://www.jianshu.com/p/51b812824ff7
"Yu" meets Ulord and creates the future together.
https://www.jianshu.com/p/fb64d8c7aad3
At 8 o’clock tonight, Ulord CEO Tan Lin will share the event preview online.
https://www.jianshu.com/p/b3efe28f461d
Ulord Zhengzhou Community’s first offline exchange meeting was successfully held
https ://www.jianshu.com/p/d0fefcd5948a
Without the exploitation of middlemen, here is a paradise for content entrepreneurs and content creators
https://www.jianshu.com/p/301c4e00af47
Opportunities of the times, our opportunities - Remembering the Ulord Zhengzhou community offline meeting on June 9
https://www.jianshu.com/p/7c02c6c14761
VII Consensus Mechanism of Blockchain
1. How to confirm and reach consensus on transaction information on the network?
Although the consensus mechanism is often mentioned, the meaning and understanding of the consensus mechanism are not clear. Therefore, it is necessary to understand the relevant concepts, principles and implementation methods of the consensus mechanism.
The transaction information of the blockchain is transmitted to each node in the network through network broadcast. How to confirm the broadcast information and reach a consensus among the entire network nodes and finally write it into the block? If there is no corresponding reliable and secure implementation mechanism, it will be difficult to realize its basic functions. Therefore, the consensus mechanism is a key to the operation of the entire network.
The consensus mechanism solves the problem of how the blockchain can achieve consistency in a distributed scenario. The blockchain can reach a relatively balanced state among many nodes because of the consensus mechanism. So how does the consensus mechanism solve the problem of mutual trust between nodes based on the idea of decentralization?
When the idea of distribution was proposed, people began to design consensus algorithms based on the FLP theorem and the CAP theorem. Standardly speaking, the consistency of an ideal distributed system should meet the following three points:
1. Termination: The consistency result can be completed within a limited time.
2. Consensus: The final decision-making results of different nodes should be the same.
3. Validity: The result of the decision must be a proposal put forward by other processes.
However, in actual computer clusters, the following problems may exist:
1. Nodes have different transaction processing capabilities, and the data throughput of network nodes is different
2. The communication channel between nodes may be unsafe
3. There may be malicious nodes
4. When asynchronous processing capabilities reach a high degree of consistency, The scalability of the system will become worse (cannot tolerate the addition of new nodes).
Scientists believe that it is impossible to achieve complete consistency in a distributed scenario. But engineers can sacrifice some of the cost in exchange for distributionThe consistency of formula scenarios, the above two major theorems also have this idea, so various formula mechanisms based on blockchain design can be regarded as sacrificing that part of the cost in exchange for more suitable consistency. My idea is that it can be done here A flexible transformation of this idea, that is, sacrificing part of the cost at an appropriate time and space in exchange for consistency adapted to the current scene, can realize a flexible blockchain system, a pluggable blockchain system. Today I will introduce my views and analysis on various consensus mechanisms. Distributed systems with or without malicious nodes are divided into Byzantine fault-tolerant and non-Byzantine fault-tolerant mechanisms.
The FLP theorem is the impossibility of FLP. It proves that in a distributed scenario, no matter any algorithm, even if only one process hangs up, there is an inability to reach consensus for other non-failed processes. possible.
FLP is based on the following assumptions:
Can only be modified once: Each process initially records a value (0 or 1). The process can receive messages, change the value, and send messages. When the process enters the decide state, the value will no longer change. The protocol ends successfully when all non-failed processes enter the decided state. This is relaxed to the extent that some processes enter the decided state, even if the agreement is successful.
Asynchronous communication: The biggest difference from synchronous communication is that there is no clock, no time synchronization, no timeout, no detection failure, messages can be delayed arbitrarily, and messages can be out of order.
Communication is robust: As long as the process does not fail, the message will be delayed indefinitely, but will eventually be delivered; and the message will only be delivered once (no duplication).
Fail-Stop model: A process failure is like a downtime and no more messages are processed.
Number of failed processes: At most one process fails.
CAP is the most discussed theory in distributed systems, especially in the field of distributed storage. CAP was proposed by Eric Brewer at the PODC meeting in 2000. It was a result of Eric Brewer's research on data consistency (consistency), service availability (availability), and partition fault tolerance (partition- tolerance) conjecture:
Data consistency (consistency): If the system returns success for a write operation, then subsequent read requests must read the new data; if the system returns failure, then all read operations No one can read this data. For the caller, the data has strong consistency.ency) (also called atomic, linearizable consistency)[5]
Service availability (availability): All read and write requests are responded to within a certain period of time, can be terminated, and will not wait forever
Partition-tolerance: In the case of network partition, the separated nodes can still provide normal external services
If the AP is satisfied at a certain time, the separated nodes The nodes serve external services at the same time but cannot communicate with each other, which will lead to inconsistent status, that is, C cannot be satisfied; if CP is satisfied, C cannot be achieved in the case of network partition, and the request can only wait forever, that is, A is not satisfied; if CA is to be satisfied, it must be To achieve consistent node status within the time, it is required that network partitions cannot occur, so P cannot be satisfied.
C, A, and P can only satisfy at most two of them. Like the FLP theorem, the CAP theorem also indicates an unreachable result (impossibility result).
Ⅷ Mars First Line | Tencent Virtual Bank has obtained a Hong Kong license and is preparing a blockchain virtual bank
Mars Finance APP reported that on November 8, the second World Blockchain Conference was held in Wuzhen. The conference focused on blockchain, digital assets, central bank digital currency, AI, 5G and other topics, and discussed the application implementation, technological frontiers, industry trends and hot topics of blockchain.
Cai Yige, general manager of Tencent's blockchain business, delivered a keynote speech on "Entering the New Era of Digital Assets" at the meeting, revealing that Tencent Virtual Bank has obtained a Hong Kong license and is preparing for a blockchain virtual bank. Banking Team.
He said that the blockchain is still in the early stage of the explosion of applications. In the large-scale implementation of applications, the blockchain itself is no longer the bottleneck, but the gateway and auxiliary technologies from off-chain to on-chain. is the key, which requires integration with cutting-edge technologies such as the Internet of Things and artificial intelligence.
He also mentioned that the Hong Kong government has begun to regulate digital virtual asset transactions, which has given enough attention to blockchain and digital assets, which is good for the entire industry. Currently, Tencent has digital asset practices in supply chain finance and improving the efficiency of asset and capital allocation, such as its cooperation with McDonald's in supply chain finance and the blockchain electronic invoice developed by Tencent itself.
