Blockchain proof of concept

1. There are many consensus mechanisms in the blockchain. The advantage of the pow consensus mechanism behind bitcoin, the most influential one, is that it is secure and can not be tampered with. The disadvantage is that it is too slow to process only seven transactions a second

2. At present, there are four main types of consensus mechanisms: pow, POS, dpos, pool
1. POW workload proof, which is familiar with mining, calculates a random number that meets the rules through and or operation, that is, obtains the bookkeeping right, sends out the data that needs to be recorded in this round, and stores it together with other nodes in the whole network after verification
advantages: complete decentralization, free access of nodes
disadvantages: bitcoin has attracted most of the computing power in the world, and other blockchain applications using POW consensus mechanism are difficult to obtain the same computing power to ensure their own security; Mining causes a lot of waste of resources; The period of reaching consensus is long, which is not suitable for commercial application.

2. Proof of rights and interests of POS, a mechanism of upgrading consensus of pow; According to the token proportion and time of each node; It can rece the difficulty of mining in equal proportion, so as to speed up the speed of finding random numbers< Advantages: to a certain extent, it shortens the time to reach a consensus
disadvantages: mining is still needed, which does not solve the pain point of commercial application in essence

3. Dpos share authorization certification mechanism is similar to the voting of the board of directors, in which the coin holders cast a certain number of nodes to verify and account on their behalf
advantages: greatly rece the number of participating verification and accounting nodes, which can achieve second level consensus verification
disadvantages: the whole consensus mechanism still depends on token, and many commercial applications do not need token to exist

4. Pool verification pool, which is based on traditional distributed consistency technology and data verification mechanism; It is a consensus mechanism widely used in the instry chain at present.
advantages: it can work without token, and realizes second level consensus verification on the basis of mature distributed consistency algorithms (pasox and raft)
disadvantages: the degree of decentralization is not as good as that of bictin; The multi center business model is more suitable for multi-party participation

it has great advantages in using consensus mechanism to ensure data consistency (the consensus mechanism is first proposed by ripple, and the network transaction synchronization mechanism with data correctness priority. In the consensus network, no matter how the software code changes, if you can't reach a consensus, you can't enter the network, let alone fork)
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PS: a little black, although the consensus mechanism can absolutely ensure that there will be no hard bifurcation at any time. However, the disadvantage of this mechanism is obvious, that is, it is much longer than the current bitcoin network to reach a consensus with other nodes. In extreme cases, the consequences of disconnection in ripple consensus mechanism network are also very terrible

it is possible that one day after the power failure in your home, the whole system will no longer be able to reach a consensus with other rippled nodes (in fact, the consensus mechanism requires more than 80% of the nodes to acknowledge your data before your submission will be accepted by other nodes, otherwise it will be rejected by exclusive nodes), Even you can only empty all your 500 GB data and resynchronize to connect to other ripple nodes

so at present, the existing rippled end is not suitable for civil use (if it is commercial, the impact is relatively small. For example, RL's own rippled node is hosted in Amazon cloud data center. If it has no response for a long time, it can make high claims, and there is almost no break in that place except for large disasters). This is one of the aspects RL has always wanted to improve.

3. Proof of concept. Is a popular confirmatory test for the specific application of customers in the instry. That is to say, according to the performance requirements and expansion requirements of users for the adopted system, the real data is run on the selected server, and the actual amount of user data and running time are calculated, POC is the abbreviation of proof of concept, which means to provide evidence for ideas. It is a set of suggested electronic model, which can be used to demonstrate the design of the team and customers, and allow to evaluate and confirm the conceptual design scheme, The evaluation of POC may lead to the adjustment of specification and design.

4. Proof of concept
proof of concept
[example] the bin Laden strike was the strategy; s ' proof of concept , ' A US official said the military action against bin Laden was a "proof of concept" of the strategy<

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5. What does POC (proof of concept) mean? It's not translation, it's professional terms
answer: POC is an electronic model noun:
1. POC is the abbreviation of proof of concept, which means to provide evidence for opinions. It is a set of suggested electronic models, which can be used to demonstrate the design of teams and customers, and allow to evaluate and confirm the conceptual design scheme. The evaluation of POC may cause the adjustment of specifications and design. The commitment of the POC process on the design and the opinions recognized by all will be recorded in the design adjustment document for future reference. In this way, POC continues to develop. If you need help completing these tasks, you can find assistance resources at Queensland University< The development steps and methods of POC are as follows: the first step is to develop an interface model that contains all the basic navigation features (buttons, icons, menus, etc.), but it is not the final perfect form. The second step is to add a small amount of content to the interface, especially one or two samples in critical media. For example, if the package relies heavily on 3D models, you should add a sample containing the 3D models necessary for the driver. If the software package needs to display data symbols and tables, samples of data symbols and tables should also be added. Note that this process should be used to support argumentation and validation design, not the actual beginning of package development. You should try your best to demonstrate and sell the design, but don't go too far, because sometimes you need to make major changes in the design process, which will lead to a waste of a lot of resources
3. POC evaluation and verification the process of evaluation and verification is to seek feedback from risk takers through POC and filing design documents. Through POC evaluation, risk takers may put forward requirements for adjusting specifications and design. Sometimes, e to design defects or inappropriate places, the design team may have to go back to the drawing board. Customers may decide to stop designing or look for other teams because the design does not pay enough attention to the needs of customers and users, or because of the instability of customer needs. Sometimes the change is caused by the customer organization or project decision maker. Usually, at the end of the evaluation and verification process, the design commitment and the opinions recognized by all will be recorded in the design documents, which is often an important milestone in the life cycle of proct development. After the evaluation and verification, POC can continue to develop< Although POC is an important evaluation technology in the process of proct development, you should also limit the time spent on POC development and consider all the factors involved in the earlier design phase to build the key elements in POC. Sufficient energy should be devoted to the argumentation and approval of design, but not too much. In this way, even if major modifications need to be made in the design, a lot of resources will not be wasted. It is necessary for customers to approve the design before the implementation of the comprehensive design
5. Customer's role specification and design stage require detailed design documents for proct development, and POC is often accompanied by proct development. It is an important project milestone for customers to sign the design documents and feedback POC. If the proct design still needs to be modified in the next stage, it should be recognized and approved according to the controlled change control process. When dealing with different inspections and pauses throughout the project, it is an important responsibility of the client to ensure the confirmed schele for on-time delivery and to agree that reinvestment is required to prevent the plan from being delayed.

6. Proof of concept. Is a popular confirmatory test for the specific application of customers in the instry. That is to say, according to the performance requirements and expansion requirements of users for the adopted system, the real data is run on the selected server, and the actual amount of user data and running time are calculated, POC is the abbreviation of proof of concept, which means to provide evidence for ideas. It is a set of suggested electronic model, which can be used to demonstrate the design of the team and customers, and allow to evaluate and confirm the conceptual design scheme, The evaluation of POC may lead to the adjustment of specification and design
1. POC is the abbreviation of proof of concept, which means to provide evidence for opinions. It is a set of suggested electronic models, which can be used to demonstrate the design of teams and customers, and allow to evaluate and confirm the conceptual design scheme. The evaluation of POC may cause the adjustment of specifications and design. The commitment of the POC process on the design and the opinions recognized by all will be recorded in the design adjustment document for future reference. In this way, POC continues to develop. If you need help completing these tasks, you can find assistance resources at Queensland University. 2. The development steps and methods of POC are as follows:

the first step is to develop an interface model including all the basic navigation features (buttons, icons, menus, etc.), but it is not a perfect form
the second step is to add a small amount of content to the interface, especially one or two samples in the critical media. For example, if the package relies heavily on 3D models, you should add a sample containing the 3D models necessary for the driver. If the software package needs to display data symbols and tables, samples of data symbols and tables should also be added. Note that this process should be used to support argumentation and validation design, not the actual beginning of package development. You should try your best to demonstrate and sell the design, but don't go too far, because sometimes you need to make major changes in the design process, which will lead to a waste of a lot of resources. 3. Evaluation and verification of POC the process of evaluation and verification is to seek the feedback of risk takers through POC and filing design documents. Through POC evaluation, risk takers may put forward requirements for adjusting specifications and design. Sometimes, e to design defects or inappropriate places, the design team may have to go back to the drawing board. Customers may decide to stop designing or look for other teams because the design does not pay enough attention to the needs of customers and users, or because of the instability of customer needs. Sometimes the change is caused by the customer organization or project decision maker. Usually, at the end of the evaluation and verification process, the design commitment and the opinions recognized by all will be recorded in the design documents, which is often an important milestone in the life cycle of proct development. After the evaluation and verification, POC can continue to develop. 4. Minimizing requirements although POC is an important evaluation technique in the proct development process, you should also limit the time spent on POC development and build the key elements of POC considering all the factors involved in the earlier design phase. Sufficient energy should be devoted to the argumentation and approval of design, but not too much. In this way, even if major modifications need to be made in the design, a lot of resources will not be wasted. It is necessary for customers to approve the design before the implementation of the comprehensive design. 5. Customer's role orientation, specification and design stage require detailed design documents for proct development, and POC is often accompanied by proct development. It is an important project milestone for customers to sign the design documents and feedback POC. If the proct design still needs to be modified in the next stage, it should be recognized and approved according to the controlled change control process. When dealing with different inspections and pauses throughout the project, it is an important responsibility of the client to ensure the confirmed schele for on-time delivery and to agree that reinvestment is required to prevent the plan from being delayed.

7. Proof of concept
concept of proof
concept of proof

8. POC: particulate organic carbon POC: pointofcontact POC: portofcall POC: piece ofcake POC: piece ofcake POC: piece ofcrap

9. Evidence / test of ideas

10. Proof of concept
proof of concept

proof of concept
proof of concept