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ABSTRACT

¡¡¡¡In recent years, with the rapid development of the economy, people's living standardshave been gradually improved, and many changes have taken place in their lifestyles. Itseems that cars have become a necessity for every family. China has nearly 200 millionprivate cars. Due to the huge car ownership and the problems of taxation and valuepreservation of new cars, it provides an opportunity for the development of the used carindustry. The transaction volume of used cars has gradually increased in recent years. Withthe increase in transaction volume, the demand for used car logistics has also increaseddramatically. At the same time, the automotive logistics industry is recognized as the mostcomplex and professional field by international logistics peers. Most of the Chineselogistics providers are outside the threshold of automobile logistics, and most of them arescattered and cluttered. There is no unified standard for transportation and management.

¡¡¡¡Company A is mainly engaged in second-hand car business, with huge transactionvolume and urgent logistics demand. At the same time, it has cooperation with manylogistics providers. Thesis article starts from the company's actual business requirements,combines current popular microservices, data analysis modeling and other technologies todesign and implement a used car logistics system that meets the company's business needs.

¡¡¡¡The details are as follows.

¡¡¡¡Firstly, according to the company's current business, the system requirements analysisis performed, and the system is pided into charter service modules, routing pricingservice modules, auction service modules, and logistics recommendation modules based ondata analysis modeling. The requirements analysis of the system is described by use casediagrams and use case descriptions, which provides a reference for the design andimplementation of the system.

¡¡¡¡Secondly, according to the results of the requirements analysis, the system is designedand implemented. In terms of system development and design, the development platform isthe Java EE platform, which pides the boundaries of services, uses a microservicesarchitecture, and uses the current mainstream SpringBoot framework. For data analysis,this article mainly uses Python's NumPy, Pandas, SciPy and matplotlib libraries for datacleaning and data analysis, forecast classification using Sequential model.The databasedesign and implementation uses E-R diagrams to describe the relationship between the dataentities, and establish the corresponding table structure in the MySQL. Detailed design of modules through UML class diagrams, describing core classes and relationships betweenclasses; describe the specific execution process of core functions through flowcharts.

¡¡¡¡Charter services mainly include the management of charter routes, capacity control andautomatic generation of shifts, etc; routing pricing services mainly include the managementof logistics providers and routing routes; auction services include the management ofauction cycles, the establishment of auctioned goods, exposure, cancellation, auction resultstatistics, automatic bidding, order matching and distribution, etc, the auction model is thecore content of the entire logistics system, and orders carried through the auction modeaccount for more than 70% of the total; data analysis and modeling with the help of dataanalysis and machine learning models, through training, verification, and testing ofexisting data, a reasonable data model is established to perform clue data forecastclassification.

¡¡¡¡Finally, test the system. Using black-box test,design test cases for each module of thesystem and give actual and expected results.The data analysis and modeling part measuresthe measurement by drawing the ROC curve. The system performance was tested bymeans of the mmTrix, Apache JMeter, emmagee, etc. The test results were in line withexpectations.

¡¡¡¡After the test is completed, the system has been deployed and used online. Accordingto feedback from logistics consultants, operators and logistics merchants, the currentsystem can meet business needs and meet expectations.

¡¡¡¡Keywords: Used Car Logistics System, Auction, Data Analysis, Forecast Classification

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