Entity Mapping Method In Data Spac

Production of multi-source heterogeneous data with large volume,variety,dynamic evolution and the characteristics of loosely related traditional cross domain data management technology is difficult to management,heterogeneous,vast and uncertain data.Data space evolutionary way and weak dependence of data model,meet the demand of increasingly sophisticated management and service requirements.But under the environment of heterogeneous data entity data query there exist many problems to solve,the keyword query efficiency and low accuracy,high efficiency of entity mapping mechanism as one of the important means of improving the efficiency of query,can bring high efficiency,convenient for the user and diversification of the query service.So the entities in the data space mapping method is of great significance.This paper studies the data type,data synchronization,heterogeneous data model,data mapping data space technology,etc.Proposed entities-community(EC),community-entity(CE)bidirectional mapping(index)method;Developed under the virtual document keywords inversion mapping technology and efficient query methods.Has the following innovation:Using RDF as a data model,this paper puts forward a kind of efficient index mechanism based on virtual documents Entity data query efficiency,the paper said the CSBM mapping method.New mapping method by virtual document and community structure of two parts.Generate public community structure,to a certain extent narrowing the scope of the query.From the perspective of users,the keyword query is given,TF-IDF and Page Rank algorithms are used to measure content relevance and edge weight,and potential Steiner graphs of public communities are searched.According to the mixed sorting mechanism,which is called CSS sorting algorithm in this paper,the results are sorted.Simulation results show that the proposed algorithm has higher query efficiency and accuracy.Based on a domestic electrolytic plant data integration platform development,design the effective entity mapping mechanism,to provide users with a key search page,has the characteristics of high accuracy,convenient,and the actual verification,has achieved good results in production decisions.