POC power candy pictures
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
function:
the commitment of 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
extended data:
evaluation and verification of POC
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. Generally, at the end of the evaluation and verification process, the design commitment and the opinions accepted by all will be recorded in the design documents
this is often an important milestone in the life cycle of proct development. After the evaluation and verification, POC can continue to develop
POC consensus mechanism integrates the advantages of pow / POS / dpos, and achieves better coordination of decentralization, efficiency and consistency in different directions, which are difficult to unify in blockchain< br />
1. Decentralization: in the POC consensus mechanism, there is no rigid limit on the number of nodes. The number of nodes is dynamic, and anyone who meets the conditions can join the nodes. Here, each outgoing node is similar to the mine pool in the pow, and can join the consensus in the mine pool by holding interests. In the pow, the pool obtains the bookkeeping rights according to the computing power. In the POC, the chance of all the pools to obtain bookkeeping rights is random and equal, which makes the node distribution of the consensus mechanism of POC more decentralized< br /> < br />
2. Efficiency: the two key factors affecting the efficiency of blockchain network are the degree of wide distribution of nodes and the hardware network resources provided by nodes. In the coordination of these two parameters, POC consensus mechanism introces the credit coefficient mechanism, which directly affects the stability of the node. Therefore, each node and the principals participating in the node will make the most favorable choice for the network to ensure that the node can provide services efficiently and stably. In addition, they will join the node consensus by means of rights and interests, The number of nodes will float in a certain range, which can be adjusted by changing the incentive parameters. When the parameters are fixed, the market will adjust automatically. In these nodes, the dpos principle of random sorting out blocks is integrated, which ensures the security and efficiency of the network and provides higher TPS carrying capacity< br />
3. Consistency: in the POC consensus mechanism, all members can participate in the consensus, and the node can only charge a certain fee to the participants. All people have equal opportunities to participate in the consensus, and the incentive is determined by the equity and node credit coefficient. Nodes and all participants will reach a consensus in order to provide stable node services.
POC particle oxidation catalyst (POC) = particle oxidation catalyst
different from gasoline vehicles, only a few new diesel vehicles adopt exhaust after treatment technology. Automobile diesel engine manufacturers have been improving the engine and its control system to meet the emission standards
The most difficult part is to rece the emission of particulates and nitrogen oxides at the same time in the low temperature lean burn environmentthe best effect can be achieved by using diesel lean burn NOx removal catalyst and diesel particulate filter
although this technology already exists, it is very expensive. In most cases, advanced particulate oxidation catalyst POC is used, which is characterized by particulate combustion
The catalyst consists of a new low temperature coating and a metal carrier called Ecocat. At the same time, the conversion of HC and CO can reach 80% - 90%has been tested on several light and heavy engines and vehicles driven by this type of engine (engines up to Euro 0 to Euro 4 standards). The biggest advantage of this scheme is that the price is relatively cheap and maintenance is not necessary. But the sulfur content in diesel oil should be low
POC is a catalytic oxidizer for particulate matter. The working principle is to catch up the particulate matter, and then burn it through the high temperature of exhaust gas (250 ℃ - 500 ℃), so as to achieve the purpose of recing the particulate matter. POC is widely used in light truck. In addition, POC can regenerate actively and DPF needs human intervention
particulate oxidation catalytic converter (POC) can be used to rece particulate matter in diesel exhaust, which belongs to the category of oxidation catalytic converter. The conversion efficiency of particulate matter is higher than doc, but lower than DPF system. The principle is to make the exhaust gas pass through a multi fold channel without blocking, and the particles are adsorbed in the POC, and the accumulated particles are removed by oxidation combustion
because POC requires a higher working temperature, it needs to be used in combination with DOC, which is called PM Kat system by European heavy truck enterprise man, that is, DOC and POC are integrated. Under the oxidation of DOC catalyst, no in the exhaust gas combines with oxygen to form nitrogen dioxide, and the original NO2 in the exhaust gas enters the POC together. Under the action of the catalyst, the molecular bond of N O2 breaks at a lower temperature, and the generated o burns with the captured C particles to form C O2, thus effectively removing the captured particles
POC can only filter the larger carbon particles, but the ability to capture the carbon particles below PM2.5 is low, and the efficiency of recing PM is 30% - 80%, which is better than doc and lower than DPF. The price of POC is lower than that of DPF and higher than that of doc
lava wants to achieve POC consensus mechanism to condense the global storage space consensus and become the root of centralized storage ecological trust, and then feed the accumulated trust value back to the construction of trust infrastructure for decentralized storage applications and services, and on this basis undertake the function of global storage space top-level indexing (lava as top-level indexing protocol architecture).