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The intrinsic construction project nature of one-of-a-kind and the requirement of massive data exchange make collaboration one of the critical factors towards success. However, due to the complexity of multiple phases and multi-disciplinary participants in project life cycle, industry level collaboration in Architecture, Engineering, and Construction (AEC) sector remains a challenge. This paper proposes...
RBAC (Role Based Access Control) model was extended in theory and a special RBAC for wireless sensor network based on energy considerations was proposed. The core modules, levels of roles and restriction mechanisms are described and defined in detail for the model. For different wireless sensor network architectures, the appropriate mechanisms were designed. Finally, theoretical analysis and evaluation...
In recently years, the Web service composition becomes a new approach of distributed application integration. The time cost of the composed Web service is one of the most concerned characters by users. Due to the long delay and uncertainty of the Internet, the performance prediction becomes a difficult problem for the Web service composition. A novel performance simulation model, called STPM, is presented...
In order to build an open, collaborative and efficient visual group learning system (VGLS for short below) in a wide area network (WAN for short below)environment, such as the Internet, this paper studies how to combine multiple techniques such as the mobile agent, ontology and Web services composition to build a VGLS. As the research result, a distributed model for VGLS (DM4VGLS for short below)...
Through a thorough collation and analysis of the historical data about exploration and development of Daqing oilfield, a system dynamics model of oil production in the field is established in this paper. Parameters in the model are analyzed and determined, and simulations are made to forecast the oil production, degree of reserve recovery, remaining recoverable reserves, the direct exploration investment...
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