一種基于中文地理分詞的動(dòng)態(tài)交通信息數(shù)據(jù)模型研究
[Abstract]:Traffic problem is an important problem in urban development at present. Therefore, the country is vigorously developing intelligent city and building intelligent transportation system, in order to speed up the construction of urban transit optimization and improve the capacity of mass transit information service. However, with the rapid development of traffic information, traffic data types are more and more, and the amount of data is increasing day by day. The analysis and processing of dynamic traffic data is also facing a severe challenge. Faced with the diversity and complexity of traffic data, more efficient and stable data organization and management methods can effectively organize and manage different types of traffic data. At the same time, it is necessary to explore and study the data organization and management model. Consider the solution of real traffic data problem. That is, in the aspect of data organization and management, it is necessary to develop spatio-temporal data model research, further improve the efficiency of data storage and management, pay attention to real-time processing and deep mining of massive data, so as to provide the society and the public with faster and more accurate. Effective traffic information service to solve the problem of slow public transportation, difficult parking, walking around and so on. Based on the complex and diverse dynamic traffic information, this paper studies the related problems of information retrieval around passive traffic information service and active traffic information search. On the basis of exploring the method of Chinese geographical word segmentation, this paper studies a data model of dynamically synthesizing traffic information and explores its application. The main works are as follows: (1) the Chinese geographic word segmentation method is studied and applied in the field of traffic geography information. In order to improve the service response speed of traffic information search, a fast segmentation method of traffic topic information is proposed firstly, and then the RMM algorithm is improved, that is, a word segmentation algorithm with traffic topic word first is implemented. The algorithm can effectively avoid ambiguous segmentation of professional words and improve the segmentation accuracy of traffic information retrieval statements by combining with the traffic information dictionary with optimized structure. (2) facing the need of the above algorithms, The storage structure of the traffic information dictionary is designed based on the hierarchical characteristics of ontology in semantic expression. Then, the lexicon of traffic topic information is established by using the relevant dynamic traffic thematic data. (3) the integrated data model of dynamic traffic information is established based on ontology method. According to ontology modeling theory and combined with the research results of geographical ontology, the traffic information ontology model for multi-topic dynamic traffic information is established. (4) the application of the model is verified. Taking Xicheng District TOCC system as an example, various dynamic information are classified and connected according to the model structure of ontology. Then, the segmentation algorithm is used to extract the traffic keywords from the user search sentences. Finally, according to the reasoning query of the traffic ontology, the integrated search and multi-directional display of the multi-type dynamic traffic information are provided. The results show that the model has some practical significance for the analysis and retrieval of multi-source dynamic traffic data. The research results can also provide a technical reference for dynamic traffic information processing. Finally, the further mining and application of dynamic integrated traffic information based on ontology knowledge are explored and prospected.
【學(xué)位授予單位】:北京建筑大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:P208
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