This paper proposes an evaluation method for the level of bus and slow traffic system connection around rail stations, considering the necessity, feasibility, accuracy and other attributes of the indicators, and determines seven constraint-guaranteed indicators and five quality-improved indicators, which can reflect the level of bus-slow traffic connection in a more comprehensive way; and gives the calculation method of each indicator, so that we can get the quantitative results of the calculation; and then determines the weight value of each indicator. Then, according to the entropy weighting method and the hierarchical analysis method improved by spherical fuzzy set, the weighting value of each index is determined. Finally, the fuzzy comprehensive evaluation method is used to get the evaluation level of corresponding stations. Finally, the targeted evaluation of different types of rail stations is realised, which can provide the basis for the subsequent adjustment of bus lines and the construction of connecting facilities.
In order to quickly mine hotspot areas from taxi trajectory data, so as to help taxi drivers improve the efficiency of passenger search and economic income, this paper proposes a grid-optimised DBSCAN algorithm. Firstly, the study area is divided into a number of grids of the same size, then the trajectory data is mapped to the grid by a function, and finally clusters are generated based on the width-first search, which reduces the search range of the boundary points of each point, and forms clustered hotspots based on the clustering of high-density grid cells. In this paper, we use taxi trajectory data in Chengdu city to conduct experiments and compare with three clustering algorithms, DBSCAN, GSCAN and K-DBSCAN, and the results show that the algorithm in this paper has a smaller time complexity, and the algorithm's DBI index is reduced by an average of 35.25%, and the average running time is reduced by 19.14%.
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