A DDS-based distributed simulation approach for engineering-level models
AddSIM is a component-based simulation environment that has been developed for weapon system modeling and engagement simulation. While AddSIM addresses component-based model development and reuse issues, it does not fully consider distributed simulation for massive and frequently changing data. We studied some approaches to develop an engagement simulation environment based on data distribution service for distributed systems (DDS). This article introduces three different approaches to apply DDS to AddSIM and describes their advantages and disadvantages. Then, we choose the best way to develop the mixture of AddSIM and DDS. According to the proposed approach, we explain the data exchange mechanism between AddSIM nodes and time synchronization for correct execution. We also define several DDS topic types for interoperation. Finally, we describe an anti-ship warfare case study to show the difference between AddSIM and the proposed approach.
To keep continual and steady development of national economy,the central government adopts different macroeconomic policies according to different economic situations.By investigating the decision process of macroeconomic adjusting and controlling,this paper proposes a framework of a macroeconomic decision support system based on data warehouse technique.The main features of this DSS are that,on the basis of data mining and text mining,the system can engage in data analysis,index forecasting and monitoring of economic indicators,and presents policy evaluation from the view of the whole economic cycle,hence the system will provide a better support for choosing the macroeconomic policies.