Papers by Keyword: Software Architecture

Abstract: The paper is devoted to basic principles to develop software queueing networks simulations. A mathematical model and general scheme of the queueing network are presented in the paper. Main network components and behavior parameters are described. The application can simulate the networks of rather complex configuration. Software under construction uses a discrete-event approach for the simulation process. Basic algorithm of the simulation is also presented.

Abstract: Today, digital protection has been widely used in the power system.Its reliability directly affects the safety operation of the entire system.However, the current study focused primarily on hardware reliability, less digital protection software reliability study.The purpose of this article is to study digital protection software reliability assessment method based on software module structure. Through the existing digital protection software reliability, performance and agility make quantitative prediction and evaluation, we analye the reliable type of digital protection software.This paper uses a "gray box" approach, namely the use of I-M chain approach. Then we come true the reliability analysis of digital protection software.

Abstract: To solve the logistics information system based on GIS application problems of small and medium-sized logistics enterprises, the software architecture of the traditional logistics information system and system based on GIS technology is analyzed, and their advantages and defects are pointed out. On this basis, a kind of service oriented four layers logistics system architecture based on components GIS is designed, using ArcSDE and ArcIMS as GIS platform, the detailed deployment of the architecture are given. The relationships between the infrastructure layer, the spatial information support layer, the service support layer, the business application layer and the components are Expounded. The architecture features of business agility, loose coupling of system interface, combine and reusability of functional components are verified by its prototype system.

Abstract: Software reliability is one of the most important quality indices in software quality evaluation. Reliability analysis based on software architecture has become a researching hotspot. This paper makes a review on existed architecture-based reliability evaluation models, and puts forward the shortage of these models. As petri net has a good ability of description for concurrency and asynchronism, this paper focuses on the research of petri net model. Transitions are divided into time transitions and instantaneous transitions. Time-related reliability, including time-delay reliability and temporal reliability, are added. Then the reachable state transition matrix is set up and system reliability evaluation proceeds. The method above is used into a avionics embedded software. At last we accomplish the architecture modeling, reliability evaluation, proving the effectiveness and feasibility of this method.

Abstract: Human error has become a serious threat to the power system operation reliability and safety. As the research of human reliability in power system continues, some quantitative methods were proposed for the power operation safety assessment. In this paper, the implementation of a human reliability evaluation system for assessing the human reliability associated with power system operation is discussed. Firstly, the software architecture of the system is given. Then the detail function design is presented. Practical experiences show that the system could be a useful tool and have an extensive application prospect.

Abstract: As one of the key equipment for handling nuclear assembly in nuclear power station, the Nuclear Fuel Elevator (NFE) is mainly used to handle the new assembly and examine the spent assembly. Considering the safety and reliability for the high radioactivity environment, the control system with two levels of hardware controllers and module hierarchical software architecture is proposed. The HMI which is convenient and user-friendly is also developed for operator. The load protection and dynamic PID-control is mentioned in detail.

Abstract: Feature modeling is a main stream technology in domain requirement analysis of software product line engineering. Establishing the traceability between feature model and software architecture plays the essential role in improving software quality. Based on Formal Concept Analysis technology, we proposed a method to verify traceability between feature model and software architecture. The method analyzed the constitution of the feature, defined feature model and software architecture function expression, constructed a concept lattice and presented several mapping criteria to analysis it. It is more applicable for higher complexity model, comparing to the other model traceability method. A case study is used to demonstrate the feasibility of the method.

Abstract: With the rapid development of mobil internent and internet of things,most of electronic commerce systems need to be improved.Software architecture evolution for electronic commerce system provides an important technology measure for its improvement work. This paper try to model software architecture evolution of e-commerce based on graph representation.Firstly the paper apply a graph to represent SA of a e-commerce system,and give its formulazation description.Then establish some basic evolution rules for software architecture evolution of electronic commerce system on the basis of defining graph transformation rule,software architecture evolution operations for electronic commerce can be carryed out according to these evolution rules.Finally through an evolution case, the sophisticated process of software architecture evolution for the electronic commerce system is described.This research work can help to upgrade the electronic commerce. system.

Abstract: In current software architecture evolution community, Trusted attributes of component are less considered; and the concept of trusted software architecture evolution has not generally agreed. Focused on above shortages, This paper propose the idea of trusted software architecture evolution, it helps to increase the trustworthiness of evolution; on the basis of graph transformation rule, establish some basic evolution rules, Evolution operations are implemented according to these evolution rules. It can ensure the exactness of evolution process. The paper also introduce E-R diagram to represent trusted software architecture evolution; and finally through an evolution case, exactly and visually describes the sophisticated evolution process of trusted software architecture evolution.

Abstract: The electric energy information collection system is used to collect and process the electricity data, and monitor the electricity consumption in real time. To make the system more extensible and maintainable, SOA (Service-oriented architecture) plays an important role in enterprise integration. Web Services is an implementation of SOA. This paper mainly introduces and analyzes the architecture of the electric energy information collection system called iES-E200PRO which is designed based on SOA. In iES-E200PRO, Web Services is used as a middleware component, which enable the system corresponds and integrates with other systems. Besides, we analyze and compare the main technology of information display. And on the basis of iES-E200PRO, we design an electric energy information display system which is based on Web Services and FusionChart. This display system has been integrated into iES-E200PRO and works well.