Research Of PDE.Mart Based PSE And Its Grid Extension

In the past several decades, research on Problem Solving Environments (PSEs) is very popular. PDE.Mart is a network-based PSE for solving partial differential equations (PDEs).It is a Java-based protocol. It provides a uniform platform for solving PDEs through network computing. It is also an object-oriented and flexible framework for building a network-based PSE through effective and efficient software integration with existing PDE systems from conventional machines.In this paper, PDE.Mart and its design are deeply explored. The architecture of the three components of PDE.Mart: PDE-GUI, PDE-LIB, PDE-Server is modified to better fit its design. Many interfaces to be implemented in the future are finished. Now PDE.Mart becomes a universal platform that could be applied to various kinds of grids. Many functional modules in different solution phase, like discretization, indexing, solution and post-processing are added to the existing PDE.Mart. To make PDE.Mart a faster, less resource consumption platform, and for the implanting from the network-based platform to the grid-based counterpart, the underlying software were updated, the type of Java Virtual Machine (JVM) were changed. Different types of wrappers were redesigned according to the memory mechanism of the new JVM.With the development of grid technology, people are becoming more interested in grid-based PSE. To implant PDE.Mart to a grid-based platform, present status and trend of grid technologies were analyzed. The most popular and widely supported Web Services technology is finally adopted according to the characteristic of creators in PDE.Mart. The advantage of Web Services technology and the service-oriented-architecture of the grid platform based on it were introduced.With the open source Apache AXIS as the Web Services developing environment, the conversion from creators in the network-based PDE.Mart to the service builder in the grid-based counterpart is illustrated when the RPC style service is used. Various technologies, like the serialization of java objects, the deployment and description of service, the workflow of service invoking, the generation of client side program, SOAP and TCP monitor of service information were deeply analyzed.