DataSheet1_Model integration methods for hydro-model platform under cloud computing environments.pdf

Computing platforms providing cloud simulation services have raised new challenges on the model integration. Unlike calls to the model programs (components) in traditional simulation software, here the models should be dynamically integrated in the “plug and play” mode regardless of the differences in model type and developer. To this end two integration methods have been proposed, i.e., coarse-grained EXE integration and interactive integration. In an EXE integration method, the simulation program is directly called and thus only a data conversion interface is needed while rewriting of the model source code is not required. In contrast, an interactive integration method wraps the model components using the standard wrapper with communication interfaces, and therefore, it can communicate and exchange data with the platform in a real time. The first method is suitable for the integration of legacy models, while the second one can control the progress of simulation schemes and facilitate the scheduling of computing resources. Examples of the model integration and platform application have been presented in hydraulics/hydrodynamics to demonstrate the effectiveness of the integration method and the cloud computing platform.

提供云仿真服务的计算平台，对模型集成工作提出了全新的挑战。与传统仿真软件中对模型程序（组件）的调用方式不同，此类平台需让模型以即插即用（plug and play）模式实现动态集成，无需考虑模型类型与开发者的差异。为此，研究人员提出了两种集成方案，即粗粒度可执行文件（EXE）集成与交互式集成。在EXE集成方案中，仿真程序可被直接调用，仅需搭建数据转换接口，无需修改模型的源代码。与之相对，交互式集成方案则通过带有通信接口的标准封装器对模型组件进行封装，因此可与平台实现实时通信与数据交互。第一种方案适用于遗留模型的集成，而第二种方案则可管控仿真流程的进度，便于计算资源的调度。本文以水力学/流体力学领域为例，展示了模型集成与平台应用的实践案例，以验证所提集成方案与云计算平台的有效性。