Research On The Method Of The Crop Model System Design Tool Based On The Semetics Metea-model

Modeling software tool the model building process,often only in the model itself does notrelate more to model standard and standardization problem.Meta-modeling technique isbased on model driven system to build the modeling language in the field.The development of model by uniform standard using meta modeling technology,the construction of crop model through the use of uniform standards using meta modeling technology,design and development model.of crop model based on crop model,finally realized between different types of crop model exchange and sharing.At the same time the crop field knowledge represented by the meta model,implementation model can be accumulated,standardized and scalable.The current development of existingcrop modeling tool using meta modeling technology.But most of them are based on the general model structure,algorithm structure,calculation of variable,often does not involvethe whole growth period of semantic knowledge reuse.How to use the element modeling technology of the reuse model of semantic knowledge,and then increase the modeling process understanding,is the focus of this paper.Crop system is a system of the mutual influence between crop,natural and human.The crop system is influenced by the interact of the outside factor such as the nature,cultivation except for the crop.Research on the crop system is in favor of analysisting the interaction bettwen the crop and the outside environment.Apart from this it is also benefit for the management and optimal design.The crop system simulation is described and the mathematical and quantitative prediction ofcrop system by using computer technology,and then complete the process of computer simulation.Through the construction of the successful development of the software system of crop model complete crop crop simulation models.In the software development process of crop model,the complex agricultural domain knowledge and knowledge of programming,which makes the development of softwaresystem for crop models often lag behind and agricultural development model algorithm.Development of the use of software tools for crop model can quickly solve the problem.In view of the above problems,this paper in the simulation process of wheat,rice and othercrops growth period of crop growth simulation,constructed a shared conceptual model.Then on this basis,through the construction of OCL expression constraint way of constructing semantic element model of crop growth period,the expression of the final element modelgraph grammar with the use of GMF technology,realizes the reuse of crop has been based on semantics,the development of crop growth model.And the growth period of rice growth period of RiceGrow model and WheatGrow model of wheat as a test case,the test tool.The contribution of this study are as follows:(1)The crop growth period to complete the construction of semantic element model simulationBased on the analysis of wheat rice and other crop model,crop growth simulation will bedivided into four kinds ofcommon semantic development environment Process driven crop growth during the whole growth period,development of phonological discrimination,displayunit scale crop,through the method of meta modeling technology and OCL expression constraint based on Ecore four construction of semantic meta model based on Ecore,finally designed a simulation semantic meta model of crop growth period to complete theconstruction of the graph grammar,semantic element model simulation of crop growing period.(2)Model designed for crop growth periodFirstly,based on the function design of crop modeling tool,based on the semantic element model of crop growth period has been constructed on the use of GMF technology,the graphical expression of semantic element model of crop growth,the crop growth period to construct a visual modeling tool.Through the realization of semantic element model of user and the crop growth period to interact with SWT technology,design and implementation ofthe final completion of the modeling tool.(3)Experimental validation of crop growth period model based on semantic element modelIn this paper,WheatGrow model and RiceGrow model of rice,wheat and tomato in Greenhouse Cucumber model four models as experimental materials,using the model design method and the crop growth period of crop growth period model design tools based on semantic meta model of growth period model of four kinds of model construction,completed the construction of four stage model,and to verify the feasibility and rationality of the methods and tools.