Design And Optimization Of Transaction Process Of Online Freight Alliance Chain Platform Based On Petri Net

The transactions of most online freight platforms are becoming more and more authentic and standardized depending on pilot work of online freight platform in February 2019 in China.However,some online freight platforms still use the loopholes in supervision to falsify the information flow,capital flow and bill flow in online freight transactions,which is an urgent problem to be solved in the current online freight industry.Blockchain technology has the technical advantages of decentralization,non-tampering of data,traceability of information,which is just suitable for solving the problems that data is easy to tamper with in the online freight transaction process and it is difficult to guarantee its authenticity in circulation.In order to better standardize the online freight industry,this thesis introduces blockchain technology into the transaction process of online freight,and designs the transaction process of online freight alliance chain platform which can better guarantee the authenticity of data.At the same time,based on Petri net,the transaction process of the online freight alliance chain platform is optimized,which further improves the efficiency of the online freight transaction process,thus achieving the purpose of further standardizing the online freight transaction process.The following is the main research content of this thesis:Firstly,by introducing different types of blockchain,analyzing and comparing their advantages and disadvantages,the alliance chain platform is selected as the starting point,and the platform operation rules and node authority distribution of the online freight alliance chain platform are rationally designed,the transaction process of the online freight platform is improved.Then,thesis obtain the detailed transaction flow chart of the online freight alliance chain platform,and different process modeling methods through comparison,Petri net is selected,and the transaction flow chart of the online freight alliance chain platform is mapped into a Petri net model of the process.Then,the boundedness,safety and activity of the Petri net model are tested by using the correlation matrix analysis method of Petri net theory,and the software solution shows that the established model is correct and meets the boundedness,safety and activity of the Petri net.At the same time,the correctness of the model is further verified by using Petri net simulation software PIPE.Finally,the Petri net model is found for subnets by using the subnet determination algorithm of the correlation matrix,and 11 subnets are obtained.By analyzing the characteristics of the correlation matrix,the "synchronous" relationship structure among subnets that affects the overall efficiency of the transaction process is found,and then corresponding optimization measures are made for the key nodes of the corresponding subnets,and then the optimized transaction process of the online freight alliance chain platform is obtained through optimization and improvement.After confirming the correctness of the optimized transaction process model of the online freight alliance chain platform by using the correlation matrix analysis method and the PIPE software simulation,considering the transition time,through the quantitative comparison of the running time of the Petri net model before and after the optimization,the analysis results show that the optimization effect of the number of transitions is 16.67%,the shortest time-consuming optimization effect of the transaction process and the longest time-consuming optimization effect of the transaction process are 8.73% and 12.88% respectively.The optimized process improves the operation efficiency of the whole process.