Research On Native Sharing Method Of Data Resources Oriented To Distributed Applications Of Geo-Analysis Models

The geography research is persistently committed to abstract and synthesize the real geographical environment to recognize geographical phenomena,depict geographical processes and summarize geographical law.Under the circumstances,as a significant abstract representation of the real geographic world,geo-analysis models have been widely regarded as cornerstone of solving geographic problems in geographic research.The distributed applications of geo-analysis models contribute to the solving of comprehensive geographical problems with Web Services of models and data resources in the Internet.With the help of transmission technology of network,the sharing of data resources in Internet is certainly dependable for the distributed applications of geo-analysis models.The demand for data resources in the context of distributed applications of geo-analysis models is concentrated in the reuse of data resources in distributed applications and the need to obtain on-demand distributed data resources in a broad sense in the network environment.However,current sharing strategies of data resources pay more attention to the sharing of spatial information in the way of data centers or in the form of data products.The processing and expression of data resources are concentrated in the data sharing center,and it is difficult for the sharing and multiplexing ability of data resources to form an orderly accumulation in distributed applications.The sharing process does not take into account the on-demand acquisition of data resources in the model applications.In fact,data resources are indispensably support for the distributed application of geo-models,which have a significant effect on data adaptation of modeling applications,driving of model calculation and conclusions of modeling applications.Therefore,the sharing solution of data resources should be developed and implemented,which shall with the help of transmission technology of network aim at reusing of data resources accumulated in modeling applications and acquiring on demand for broadly distributed data resources in the Internet.Demand-oriented of data resources for the distributed applications of geo-analysis models in the Internet,beginning with the data requirements analysis of the distributed applications of geo-analysis models,this paper made a study of data resources description method that supports understanding of the ability to share data resources.Further,closely follow the data requirements for the on-demand acquisition of broadly distributed data resources in Internet,which contributes to form a data resource native sharing method based on the understanding of data resource sharing capabilities,the scalability of data resource sharing and reuse capabilities as a means,and the orderly accumulation of data resource sharing and reuse capabilities as the goal.Finally,it provides reasonable and effective support to meet the data resource requirements in the distributed application of geographic models in the network environment.(1)Research on the description method of understandable data resources for native sharing capabilitiesAccording to the analysis of the data resource requirements in the context of the distributed application of the geographic model,this paper summarized the file,content and express data resource requirements reflected in the various stages of the geoanalysis model application.Facing model application requirements,in order to understand the comprehensibility that supports the native sharing and reuse of data resources,a data resource description method is proposed.This method is an understandable realization of data resource sharing capabilities.Based on the cognition of the description of data resources,by summarizing the description elements of the native sharing of data resources and designing the standardized expression of the sharing description elements,a framework of the description of data resources supporting native sharing is established.Finally,with the help of Web services technology construct the interfaces of data resource description for the native sharing method called in the network environment.(2)Research on the native sharing strategy of data resources that is understandable based on the sharing abilityThe requirements of multiple types of data resources under the distributed application of geo-models are analyzed,and the basis for in-place sharing under the guidance of demand is clarified.In addition,this study on the one hand proposed the overall structure design of the in-place sharing strategy for data resources,which contains conceptual framework,composition,network foundation and sharing process of the native sharing method.,on the other hand raised an extensible component method based on programming templates,which enriches the sharing content of the native sharing method.Furthermore,a data resource natively shared service container is developed to provide data resource service supporting to the distributed application of geo-models in the form of data resource natively shared service nodes.Besides,the design of sharing message transfer engine between the sharing nodes in the native sharing process has been implemented,which supports the exchange of shared information between the native sharing service containers.In the end,the opening and reusing of natively shared data resources are taken into consideration in the paper.According to the analysis of data resource requirements under the circumstances of distributed applications of geo-models,this paper designed a data description method of data resources that contributes to the characteristic understanding of natively shared data resources.A strategy of sharing data resources natively oriented to the data requirements of distributed applications of geo-analysis analysis models is proposed and implemented.Based on the designed method,a prototype system for native sharing of data resources supporting distributed applications of geo-analysis models is developed,which provides a platform for the experiments of distributed applications of geo-models supported by native sharing method of data resources.Depending on the developed prototype system,several experiments such as the application of FAST models relying on native sharing data resources have been done and verified the feasibility and effectiveness of the native sharing method.Eventually,it provides reasonable and effective data resource support for the distributed application of geoanalysis models in the network environment.