Research And Design For The Smart City's Directory Management Service System

With propose of concept of smart city,more and more attention has been paid to the construction of information resources platform.As the fundamental support for the application of smart city,the smart-city-based directory management service system plays an important role in smart city system framework.For convenience,we referred to the directory management service system oriented smart city as directory management service system short in the following.At present,the information resources of various departments are subject to the tradition,which makes the relevant information resources can't be effectively used,thus causing a huge number of redundant construction and more cost of software and hardware resources.In order to change the above situation,this paper introduces a directory management service system oriented to smart city.Through analyzing the structure of government information resource management,combine with the cloud computing platform,the technology of information push,the technology of string similarity matching.We shares the information of each department which has become "information isolated island",so that the information resources can be reasonably utilized at directory management service system.In this paper,we design and implement a directory service and management system based on cloud platform after study and analysis the smart city all of the world and a great kinds of directory system.The main contributions of this paper are summarized as follows:Build the Gram-Trie tree which based on gram.This structure can friendly support the Count-Filtering,Length-Filtering,Position-Filtering and make better use of the memory space.Then we applies the concept of length-segment and position-segment on the structure.Build the index structure according to the existing Gram-Trie tree.Selected a suitable length of Prefix-Filtering,which makes it possible to be read into the inverted list as less as possible,and use the filter for filtering in the process of reading,so that the number of candidate sets can be reduced,thus improving the efficiency of the query string.At last,we use an experiment to test the cost of find a string on LP_vA-Index which use the method.Build test platform.Tested and compared the efficiency of the LPA-Index index structure and the already existed LPA-Index index structure in the string similarity search,and give the conclusion.On the basis of understanding the wisdom of the government,we design and implement the directory management services system.First,we make a detailed analysis of the directory management service system by means of the method of iterations.Then the function of each module is designed in details.Finally,implement the directory management system.Make a summary of the corresponding work and contributions of directory management services system and string similarity search,then proposed some opinions for the future work of the string similarity search and directory management service system.