Liu Jingyong

Middleware-based distributed systems software process

Middleware facilitates the development of distributed systems by accommodating heterogeneity, hiding distribution details and providing a set of common and domain specific services. It plays a central and essential role for developing distributed systems. However, middleware is considered a mean rather than core elements of development process in the existing distributed systems software process. This paper explains the concept of middleware by categorizes middleware and analysis the problems of current middleware architectures. It also extracts three essential non-functional requirements of middleware and proposes a middleware-based distributed systems software process. The proposed software process consists in five phases: requirements analysis, design, validation, development and testing. The characteristics of middleware are considered in the entire software process.Middleware facilitates the development of distributed systems by accommodating heterogeneity, hiding distribution details and providing a set of common and domain specific services. It plays a central and essential role for developing distributed systems. However, middleware is considered a mean rather than core elements of development process in the existing distributed systems software process. This paper explains the concept of middleware by categorizes middleware and analysis the problems of current middleware architectures. It also extracts three essential non-functional requirements of middleware and proposes a middleware-based distributed systems software process. The proposed software process consists in five phases: requirements analysis, design, validation, development and testing. The characteristics of middleware are considered in the entire software process.

Applying AOP and MDA to Middleware-Based Distributed Real-Time Embedded Systems Software Process

Aspect-Oriented Programming (AOP) and Model-driven Architecture (MDA) are very important as technologies to resolving lifecycle challenges of DRE systems, including requirements analysis, design, validation, development and testing. This paper provides two contributions to the study of DRE systems development. First, analyzes non-functional requirements of DRE systems. Second, proposes a new aspect-oriented middleware based DRE systems software process, and applies AOP and MDA technologies to the process. The characteristics of middleware are considered in the entire DRE systems software process from requirements analyze phase to testing phase.

Aspect-Oriented Middleware-Based Real-Time and Embedded Systems Software Process

Middleware facilitates the development of real-time and embedded systems. However, middleware itself is becoming increasingly complex. Using the methodology of aspect-oriented software development to analyze and reconstruct the architecture of middleware can make the architecture more modularized and more customizable. In addition, since middleware plays a significant role in the realtime and embedded systems development, its characteristics must be considered in the entire real-time and embedded systems software process from requirements analyze phase to testing phase. This paper provides two contributions to the study of real-time and embedded systems development. First, presents the problems of current middleware architecture and analyzes functional requirements and non-functional requirements of aspect-oriented middleware. Second, proposes an aspect-oriented middleware based real-time and embedded systems software process. Both functional and non-functional characteristics of middleware are considered in all phases of the software process.

Study on Industrial Sludge Catalytic Combustion by TGA

It is necessary to clarify the combustion process of industrial sludge in order to utilize it efficiently as an energy source. In this paper the influences of three catalysts (K2CO3, NaCl and Al2O3) on the ignition and burn off characteristics of industrial sludge had been investigated by simultaneous thermogravimetric analysis (TGA) with linearly increasing temperature at air atmosphere. The results indicated that the metallic compounds had some catalytic effects on the combustion of industrial sludge. The ignition temperature dropped in the presence of K2CO3, NaCl and Al2O3 and three catalysts were all favorable for the combustion of industrial sludge. Furthermore, characteristic indexes of combustion were changed a degree correspondence to add different metals. While to the same metal, the catalytic action was also variant at different combustion stages. But in the whole process the catalytic action of K2CO3 performed stronger than that of NaCl and Al2O3 .The catalytic mechanism of industrial sludge combustion was distinct with adding different metal compounds. The ignition point was ahead at the beginning of combustion because the organic volatile compounds were released stimulatively with the domination of metal compounds. But at the other stages, metals serving as the carrier of oxygen made it easier for sludge combustion with the displacing and diffusing of oxygen.