The steps and steps are as follows: First, it should be determined which subject of the data to be mapped belongs to which field in the exploration and development 12, that is, the data to be mapped reflects which aspect of the exploration and development, such as geological, or reservoir or production. Reports and more. According to step (1), the activity category involved may be determined, and the activity entity that identifies the application theme is correspondingly selected from the activity model. According to the actual meaning of the data item, the core entity 13 identifying the batch of data is determined in the object model, thereby determining that the core entity core entity may be more than one in the Epicenbe model, and then retaining the useful attributes in the core entity, The rest is omitted. Identify the attribute entities, that is, find the attribute entities that store this data in the Epicentre data model, which are mostly prefixed with Ry-. After determining a group of entities that express a data item, the reference path of the entity can be determined according to the reference relationship between the entities, and the constraint relationship of the entity is determined according to the value of the attribute in the entity, and finally Epicentre expressing a certain data item is obtained. A submodel. This mapping process can be assisted by the data mapping tool 14. The set of sub-models is the mapping result. With these mapping results, if the data access efficiency is improved, the model projection tool 15 can be used to re-project the sub-model. Applying this model and then DAEF can access the data in the POSC data warehouse. 3 Conclusion POSC's Epicentre data model defines quite a wealth of entities and attributes for petroleum exploration and development, and 1551 entities are defined in version 2.2. In practical applications, only understanding the model specification can correctly map the data to the Epicentre model, so that the expression of China's petroleum exploration and development data can conform to the POSC specification and lay the foundation for future data integration. The promotion and application of POSC technology is firstly the implementation of Epicentre data model technology. If the model is not accurately understood, it will hinder the promotion of POSC technology. The Epicentre core model and data mapping technology have practical guiding significance for the application personnel, whether they are mastering the Epicentre model or using DAEF programming, or based on the construction of the POSC data warehouse. Exit Sign ,Exit Sign With Lights,Photoluminescent Exit Signs ,Emergency Exit Door Sign Effort Semiconductor Lighting Ltd. , https://www.effortem.com
Calculation of bearing capacity of square steel tubular eccentric compression members
The steps and steps are as follows: First, it should be determined which subject of the data to be mapped belongs to which field in the exploration and development 12, that is, the data to be mapped reflects which aspect of the exploration and development, such as geological, or reservoir or production. Reports and more. According to step (1), the activity category involved can be determined.