Research Article
Method and System for Detecting and Recognizing Floating Garbage Moving Targets on Water Surface with Big Data Based on Blockchain Technology
Table 1
Comparison of the characteristics of the three forms of blockchain.
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 |  | Comparison item | Public chain | Private chain | Alliance chain |  | 
 |  | Degree of centralization | Decentralized | Centralization | Polycentric |  | Participant | Everyone | Central controller designated member | Preset members with specified characteristics |  | Bookkeeper | All participants | Customize | Negotiated |  | Trust mechanism | Proof of work | Self-endorsement | Consensus mechanism |  | Advantage | Easy application deployment, any user can access, the application is easy to deploy | Low network energy consumption, the rules are easy to modify, the transaction volume and transaction speed are unlimited | Easy to set control authority, has a very high scalability |  | Insufficient | Most restricted transactions | Limited access node, can’t solve the trust problem | Does not fully solve the trust problem |  | 
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