The Internet of Things that links the cyber and physical worlds brings revolutionary changes to society, however, its security and efficiency problems have not been solved. The Consortium Blockchain + IoT is considered to be an effective solution. The IoT blockchain network’s demand for transaction processing speed is gradually increasing. The throughput problem of the blockchain needs to be solved urgently and the security problem of transaction processing that comes with it. To solve the above problems, this paper proposes a reputation-driven dynamic node security sharding consensus model (RDSCM) in the blockchain, which consists of two parts: a reputation-driven node to eliminate PBFT (RE-PBFT) and a reputation-driven node cross reconfiguration sharding scheme (NCRS). The RE-PBFT eliminates abnormal nodes in the consensus network and reduces the probability of abnormal nodes becoming master nodes. NCRS improves the blockchain throughput while ensuring sharding reliability. Finally, the experiment proves that RE-PBFT can identify abnormal nodes and remove them in a short time. NCRS can effectively guarantee the reliability of sharding, and the transaction processing efficiency has been greatly improved after sharding.
As a major that connects theories and practice closely, financial management major of higher education is supposed to take practical teaching as its main task. In this paper, the "SPM" mode proposed by American educational psychologist Jerome.S.Bruner,is applied to practical teaching of financial management major. The "SPM" mode construct the learning situation or mapping with three dimensions-sound, picture and motion. According to the three dimensions, financial management major can construct characteristic objectives and diversified environments, foster students' practical ability, establish practice base and situational evaluation mode of practical ability. Therefore, the "SPM" mode helps to construct an effective system of practical teaching, in all-directional and three-dimensional ways, for cultivating application-oriented talents of financial management.
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