Graphene technology in blockchain
From the perspective of technology and architecture, I will tell you my understanding of blockchain in common language
what is blockchain? In a word, blockchain is a storage system. To be more specific, blockchain is a distributed storage system without an administrator and each node has all the data
What are the common storage systems like
first, how to ensure high availability
the common storage system usually uses "rendancy" to solve the problem of high availability. As shown in the figure above, if the data can be copied into several copies and rendant to multiple places, high availability can be guaranteed. The data in one place is hung, and there is data in other places. For example, the master-slave cluster of MySQL is the same principle, and the raid of disk is also the same principle
two points need to be emphasized in this place are: data rendancy often leads to consistency problems
1. For example, in the master-slave cluster of MySQL, there is actually a delay in reading and writing, which means there is a inconsistency in reading and writing in a short period of time. This is a side effect of data rendancy
The second point is that data rendancy often reces the efficiency of writing, because data synchronization also consumes resources. If you add two slave libraries, the write efficiency will be affected. The common storage system is to use rendancy to ensure the high availability of dataso the second question, ordinary storage system, can write more
the answer is yes, for example, take this graph as an example:
in fact, MySQL can do a master-slave synchronization of al masters, master-slave synchronization of al masters, two nodes can be written at the same time. If you want to do a multi room multi live data center, in fact, multi room multi live data synchronization. What we should emphasize here is that multi-point writing often leads to the consistency problem of writing conflicts. Take MySQL as an example, suppose that the attribute of a table is self incrementing ID, then the data in the database is 1234 now. If one of the nodes writes and inserts a piece of data, it may become 5, and then these 5 pieces of data are synchronized to another master node, Before synchronization, if another write node inserts a piece of data, a piece of data with self incrementing ID of 5 will be generated. Then, after the generation, synchronize to another node, and the synchronized data will conflict with the two local 5's after it arrives, which will lead to synchronization failure and write consistency conflict. This problem will occur in the case of multi-point writing
how to ensure consistency in multi-point writing
the reform "Swan class" gives you more technical work
Graphene, graphene, is the underlying technology architecture of blockchain created by EOS founder Daniel Larimer and cryptonomex team. Based on this architecture, Daniel has developed bitshares, stem, EOS and other far-reaching projects. The famous blockchain projects developed based on this architecture include Zoomlion auto chain, gongxinbao, karma, payger, echo, seer and so on
Zac chain is an electric vehicle intelligent ecosystem based on blockchain technology. Supported by the core technology of blockchain, supplemented by AI, big data, Internet of things and other technologies, and based on the vehicle traveling data recorder tntelligent tree as the carrier, it customizes an intelligent experience service system for electric vehicle users, covering both the front market and the back market. In the Zac chain network, users can fully control their own driving data, and enter the mining mode from the blockchain technology. Driving is mining, and driving is value. The Zac token generated by mining can be exchanged in the Zac chain ecosystem to solve the pain point of depreciation of users' car use
1. Lianzhuang data block structure based on blocks
2. Network wide shared ledger
3. Asymmetric encryption
4. Source code open source
blockchain 2.0 era technical basis:
1. Smart contract; It is an application in the blockchain system. It is a business logic that can run automatically by coding. It usually has its own token and special development language
2. DAPP: it includes the user's applications, including but not limited to various cryptocurrencies, such as Ethereum wallet
3. Virtual machine: used to execute the compiled code of smart contract. Virtual machine is Turing complete
with the application and deepening of blockchain technology, the era of blockchain 3.0 has come. The mode of blockchain cooperation can be seen from behind the operation of all walks of life. Therefore, blockchain will change the way of human life widely and profoundly, so the whole life service will enter the era of blockchain. In the process of Internet development, blockchain + physical instry, blockchain e-commerce and blockchain community operation can be applied to blockchain technology
of course, 3.0 came into being with the development of modern cryptography. Today's applied cryptography is the result of cryptography 20 years ago. Therefore, in order to apply blockchain technology to more participation scenarios, especially in Internet economy and other aspects, more verification is needed to verify whether the existing encryption technology can meet the demand, and more in-depth integration of cryptographic frontier technology and continuous innovation are needed.
Weihai Guangtai:
in December 2014, Weihai Guangtai (002111) signed a series of UAV system development cooperation agreement with a cooperative unit, in which a certain type of high-speed UAV has been successfully tested. The company said that the signing of the agreement laid the foundation for the two sides to carry out strategic cooperation in the field of UAVs and jointly develop a series of UAVs. On September 29, 2015, the company plans to issue no more than 21.5 million shares at a rate of no less than 27.73 yuan per share, and raise no more than 540 million yuan of funds to invest in UAV projects and supplement 160 million yuan of working capital of the company. The company plans to invest 380 million yuan in the acquisition and capital increase of Quanhua times and the UAV project< Aerospace Science and technology:
the third Academy of Aerospace Science and instry, the major shareholder of the company, has profound knowledge in the field of UAV. A UAV command station of the company has been successfully developed recently, and Haiying UAV has assisted Beijing police to participate in air drug control operations as early as last year. The company has the expectation of injecting UAV< Aerospace Electronics:
the company's UAV procts were exhibited at the 8th China International Police Equipment Expo in 2016. There are six types of Rainbow series UAV procts on display, which can meet the requirements of aerial reconnaissance and surveillance, automatic target tracking, three-dimensional target detection, accurate target strike, on-site image acquisition, automatic target tracking, automatic target tracking, automatic target tracking, automatic target tracking, automatic target tracking, automatic target tracking, automatic target tracking, automatic target tracking, automatic target tracking, automatic target tracking, automatic target tracking, automatic target tracking, automatic target tracking, automatic target Information processing, information sharing and other functional requirements; On the evening of July 28, 2016, it was announced that it planned to jointly invest with the controlling shareholder China Aerospace Times Electronics Co., Ltd. to establish three subsidiaries, namely: Aerospace Times UAV Technology Co., Ltd., Beijing Aerospace Feiteng Equipment Technology Co., Ltd., and aerospace Internet of things Technology Co., Ltd., in order to promote the development of the company's UAV instry and build a development platform for precision guidance system instry
Raptor Technology:
in January 2015, raptor Technology (002577) invested 50 million yuan, holding Shenzhen zero intelligent aircraft Co., Ltd., and officially entered the UAV market. As a domestic leading enterprise of wireless keyboard and mouse, raptor technology has many years of R & D and proction experience in the field of wireless transmission technology, with outstanding hardware supply chain, proction capacity, quality control and other capabilities. In order to enhance software strength through acquisition, raptor technology is expected to build an integrated platform of UAV software and hardware<
xuelaite:
in September 2015, the company planned to raise no more than 350 million yuan of funds through non-public offering of shares, adding strategic weight to the previously focused UAV field. In May 2015, the company entered the field of consumer UAV through the acquisition of Manta intelligence. This time, the company decided to increase the UAV field, which will rapidly improve the UAV proction capacity of the company and accelerate the development of the UAV instry of the company
Nanyang Technology:
in October 2016, the company plans to purchase 100% equity of rainbow company with 2.416 billion yuan and 84% equity of Shenfei company with 729 million yuan. At the same time, it plans to issue shares to the 11th Aerospace Research Institute to raise 1.4 billion yuan for the construction of rainbow UAV instrial base and the development of new concept UAV. Rainbow UAV brand started in 1999, with rich proct spectrum and advanced technical indicators in the world. It is the UAV series with the most complete model spectrum, the earliest batch export and the largest export volume in China< Longxin GM:
on August 22, 2014, it announced that the company signed a joint venture framework agreement with Professor Wang Haowen of Tsinghua University and Lihe venture capital, and plans to jointly invest to establish a joint venture company, specializing in the R & D, manufacturing and sales of complete UAV system and parts. The company plans to invest 50 million yuan and hold 50% equity of the joint venture
Xin'an shares:
the company invested 13.5 million yuan in Anyang Quanfeng Aviation Plant Protection Technology Co., Ltd., the holding subsidiary of Quanfeng biology, holding 15% of its equity. The company's main business is "agricultural UAV research and development, assembly, flying hand training."< In May 2013, Shanhe technology was officially awarded the "proction license certification" for all composite light sport aircraft; On May 11, Shanhe technology aviation instry base was officially put into use. The proction workshop of the base can meet the proction demand of more than 300 sa60l light sport aircraft per year. At present, it has completed the design, manufacture and flight test of Aurora, ST series power delta wing, flying eagle UAV system, flying geese remote sensing mapping UAV system and flying tiger UAV system. It is the first domestic enterprise that has passed the airworthiness certification of CAAC light aircraft
Shandong mining machinery Co., Ltd.:
in March 2013, the company invested 41 million yuan to establish a joint venture UAV company, accounting for 82% of the equity. After the establishment of the joint venture company, it will focus on UAVs with long idle time, large payload and outstanding short takeoff and landing performance, which are mainly used for reconnaissance, detection, patrol, surveillance and other tasks. In April 2014, the company's UAV project has been optimized and wind tunnel tested for 12 times, and the aerodynamic design has been frozen and solidified; Flight control simulation is over; The structure design and tooling die design of UAV prototype have been completed, and two experimental verification prototypes have been put into proction
Silicon based chips, which are used in mobile phones, are the mainstream procts in the world. For example, Kirin 9000 of Huawei and A14 of Apple both use silicon-based chips, and these two chips are the two most technologically advanced in the field of silicon-based chips, so it is very difficult to make them
However, with the improvement of silicon-based chip technology, many experts predict that the chip will soon meet its physical limit, and the room for performance improvement will become very small. For the future development of science and technology, researchers also need to start looking for new chips, in which graphene material is noticed by researchers in many countries and regarded as the only choice for future chips, How difficult is it to make graphene chips? What's the difference between it and traditional chips
to sum up, the biggest difference between carbon based chips and silicon-based chips lies in the different manufacturing methods and materials, and the performance is also greatly different because of the different core materials. However, although carbon based chips are very good, they can be seen from the technology mastered by China and other countries in the world, Carbon based chips may not be used in daily life in the next 10 years, but it is still possible to achieve commercial use
In recent days, the hair of wool is relatively small. On the one hand, it's a little sad because the first time I took over the project was not smooth. On the other hand, someone said: I only take the hair of the commander, the others are unreliable. The commander is very grateful to his friends for their trust. However, if you only use the wool from the commander, this is contrary to the original intention of the commander. The commander hopes that you can learn how to use wallets and telegrams, learn how to cross walls, and be able to identify phishing websites. You have your own judgment. In fact, you don't need to distinguish whether you are reliable or not, because 90% of the coins will become air coins, Many project parties have no funds to go to the exchange at all. Even if they go to the exchange, it may break down because of insufficient maintenance funds, poor operation and other reasons. I think the friends who pay attention to the blockchain are mainly about 30 years old, and they all understand the reason that things are changeable. The commander is the wool party at the present stage, but the real purpose of the commander is to get on the train one step earlier than others. Now it is just the preparation stage
when it comes to the fact that the currency price has been falling at the present stage, many people have been cut off one after another, but in fact, most people in China started to join the currency circle at the end of last year. I still remember that bitcoin almost reached the high point of 20000 at that time, and many people entered the market to speculate on the opportunity, It is also this group of people who have not yet felt the warmth of the bull market and suffered from the bear market, suffered heavy losses and scolded the coin circle for pitching people. However, several people saw that when bitcoin plummeted in previous years, those coin speculators were poor enough to eat instant noodles, so they were greedy but did not have rational thinking when others got rich. They stayed in the coin circle for a long time. Last year, there were too many new entrants, and virtual currency became popular. Because of the lack of supervision, MLM and fraud soon became the banner of blockchain. Now that supervision begins, no one can predict the trend, and big capital dare not enter the market. Stop loss is not cut. That's it
collecting wool itself is the uncertainty of collecting TA. In case of a project landing, the currency will be worth hundreds of times and become the mainstream currency in one fell swoop. At this stage, it is more profitable to roll wool and brush on behalf of others than to stir fry currency. Many people ask about cash flow. I don't think the project party is stupid enough to cash it for you on the spot. The project party is for promotion. Because of uncertainty, the big wool party won't swipe a lot of accounts to spread. If it can be cashed on the spot, several technical wool parties can bankrupt the project party
and don't ask Du Niang when things go wrong. I welcome novices to do woollen work, because it can be a good opportunity to understand the blockchain. However, we should strengthen our hands-on and brain skills. We should get out of the cramming ecation, There is a threshold for woollen goods. Telegraph, wallet and VPN have been written several times by the commander alone. However, some people still ask me that what I care about is not always answering these questions, but that everyone has no patience to read more articles and start to practice! Impatient people should work hard. Those who have more money should buy money to pay their tuition. I hope no one will say that if they read your articles, they would not have paid so much tuition
two days ago, a very young girl said something to me. After thinking about it, I'd better share it with you. She said: the coin rings are all big and thick, just wrapped in the coat of new technology. What can you understand from it? Different people have different opinions. Anyway, the commander has deep feelings and a beautiful life. We should do it and cherish it