Software Component Technology Research Articles

The Performance Quantitative Model Based on the Specification and Relation of the Component

The trustworthiness of software is crucial to some safety critical areas. Performance is an important attribute of software trustworthiness. Software component technology is the mainstream technology of software development. How to achieve the performance of component systems efficiently and accurately is a challenging issue for component-based software development. In this paper, the performance quantification method of the component is proposed. First, performance specification is formally defined. Second, a refinement relation is introduced and the performance quantification method of the component system is presented. Finally, a case study is given to illustrate the effectiveness of the method.

Updating Model of Software Component Trustworthiness Based on Users Feedback

The software trustworthiness measurement is one of the hot topics. Software component technology is the mainstream technology of software development. How to get the trustworthy degree of software component efficiently and accurately is a challenging issue for the component-based software development. Getting the trustworthy degree of software component needs many users' success cases. In this paper, we propose an updating model of software component trustworthiness. First, the trustworthy degree of the software component is computed based on users' feedback. Then, the weight of updating is determined by the number of users. Finally, the method of cluster different companies is based on the Euler distance. A case study shows that the method is reasonable and effective.

Research of Component Software Reliability Estimation

With the rapid development of component software technology, it is very important how to improve the single component software reliability and how to estimate the whole software system reliability using component software reli- ability. In this paper, we firstly analyize the defects of the traditional method to calculate the component software reliabil- ity estimation. Then, a new strategy is presented for solving this problem. We call the strategy as variance decomposition. Finally, we verify the advancement of the approach in the theory. 1. FOREWORD Today, with the rapid development of computer science, the software development of the large complicated software system, based on the component software design, is turning mature day by day. Whereas, with the main emphasis put on the development technology of the component software and the reuse technology of the component software, less atten- tion has been attached to the quality problems, like the com- ponent software reliability (1). To improve the reliability of the component software, it is a common practice to calculate or estimate the reliability of the software system. As the available data of the compo- nent software rating is rather limited, so the accuracy of the estimation of the reliability, based on the data, would be greatly affected. Besides, when the same performance is re- quired, it is possible to use the same component software in various systems or in different positions of the same system. So it is necessary to take the variance decomposition and confidence interval into definite consideration. 2. TRADITIONAL RELIABILITY ESTIMATION The pattern of the software reliability estimation can be divided into the reliability distribution pattern and redun- dancy distribution pattern. For the reliability distribution pattern, the reliability of the component software is regarded as a decisive variable. As for the redundancy distribution pattern, the decisive variable is the choice of the redundance rating and component software. 2.1. The Pattern of Reliability Estimation

A component framework for the parallel solution of the incompressible Navier–Stokes equations with Radau‐IIA methods

SummaryAn efficient solution strategy for the simulation of incompressible fluids needs adequate and accurate space and time discretization schemes. In this paper, for the space discretization, we use an inf–sup stable finite element method and for the time discretization, Radau‐IIA methods of higher order, which have the advantage that the pressure component has convergence order s in time, where s is the number of internal stages. The disadvantage of this approach is that we have a high computational amount of work, because large nonlinear systems of equations have to solved. In this paper, we use a transformation of the coefficient matrix and the simplified Newton method. This approach has the effect that our large nonlinear systems split into smaller ones, which can now also be solved in parallel. For the parallelization of the code we use the software component technology and the Component Template Library. Numerical examples show that high order in the pressure component can be achieved and that the proposed solution technique is very effective. Copyright © 2015 John Wiley & Sons, Ltd.

Research on the Clustering Algorithm of Component based on the Grade Strategy

The rapid development in the software component technology increases the number of components, reasonable component classification is the foundation to achieve effective retrieval. The former methods like faceted classification and full text retrieval methods and some traditional methods have always some subjective factors to achieve it. The user is not able to satisfy with these methods. So from the point of user requirements, grade strategy is introduced, which gives each facet different weight, and the similarity between the components. A component clustering algorithm based on the grade strategy is proposed. They prove that component clustering algorithm based on the grade strategy makes the component clustering result more humanized and better serve user requirements.

Sharing Technology of the Tracking Telemetry and Command Software

The software sharing is the development trend of tracking telemetry and command software. How to develop quickly the tracking and controlling tasks software to adapt to the current experimental situation, and to ensure software quality, is a challenging subject placed in the face of software personnel. Using software middleware and software component technology, we can solve the problems of Tracking and Controlling Network acrossing operating system, Tracking and Controlling Software acrossing program languages, software reuse and other issues.

Research and Implementation of SOA Application Based on Component Technology

Taking command of an organization working in the field of research background, first thought SOA architecture provides a brief introduction to analyze the definition of SOA architecture, composition and basic characteristics; then the concept of software reuse and component technology, classification and component specification also gives a brief introduction, and compare the similarities and differences between SOA and component technology. Finally, after the adoption of principles and in-depth analysis of the characteristics and advantages of the above-mentioned technical theory, the actual project - designed on the basis of command system, proposed the use of layered application architecture based on SOA technology components for the overall system implementation. Explore how to design resource layer, component layer, services, processes and access layers to build a good architecture, intended to achieve efficient and loose coupling between the level of purpose, and build applications and develop a multi-command system quickly.

Software Component Technology for Embedded Systems with Memory Protection

Software Component Technology for Embedded Systems with Memory Protection

The Design of Online Examination System Based on UML & Component

This paper first discusses the related concepts of software component technology based on software component technology and software development method, and then based on the UML technology component extraction method and component extraction strategy, the system, the component extraction, the establishment of system function of each part and component model, software component technology is introduced into the online test system development, so as to improve the application software system development speed and efficiency and maintainability, reconfigurability and scalability.

Research on XML Based Flexible Web Application Design

During web applications developed and deployed in many and many enterprises today, how to make sure their web applications satisfied to their individual and specific business requirements and marketing changes has been become a major problem. As now a lot of web applications are only designed and developed for specific business and they are normally high-coupled together with very bad system opening, collaboration, and flexibility. Here, by research on XML based web application design with software bus, component and workflow technologies, with multiple tiers layout and from user interface flexibility, business flow flexibility and data model flexibility, it illustrates a new way for a flexible web application design and try to improve web application flexibilities and to enhance enterprise satisfaction to their applications meeting with their business and marketing changes.

Research on Task-Oriented Application Design

Alone with “The Internet of Things” development and expanding in the areas of life, it also brings some big challenges to the traditional software application design and development; especially with the corresponding technologies and strategies of the internet of things enhancement and improvement, and further more with some new equipments and technologies appended or changed in the existing environment, it needs rapidly and easily add some new functionalities to the existing working software applications. But the traditional application design and development still thinking of solution from designers and developers and not from the business point of view, this results in the traditional software applications and its scalability cannot be easily and rapidly satisfy to business requirements. Here, by research on XML, software bus, software component and task-oriented technologies, it illustrates a new way for the software application design and development and try to use task-oriented technology to improve the software application flexibility and scalability to satisfy to enterprise business changes.

Research and Design of the Three-tier Distributed Network Management System Based on COM / COM + and DNA

Considered on the distributed network management system's demand of high distributives, extensibility and reusability, a framework model of Three-tier distributed network management system based on COM/COM+ and DNA is proposed, which adopts software component technology and N-tier application software framework design idea. We also give the concrete design plan of each layer of this model. Finally, we discuss the internal running process of each layer in the distributed network management system's framework model.

Research and Design of a Fusion Technology in Highway Engineering Measurement and Payment System

For the request that was proposed in research and design for measurement research and payment system of the highway engineering: flexible business process control and integration management issues of spatial and attribute data and so on. The article proposed a method in which GIS integrated with workflow: using construction supervision for highway measurement and payment workflow as main line, using component software technology as basis ,and with a development platform achieving the integration of workflow with GIS. Based on the fusion technology, the article completed the technical framework and design of the system. The feasibility and effectiveness of this fusion technology was verified in the practical application.

A Software Decoupling Partition Method Based on Interactive Genetic Algorithm

With the development of software component technology, extraction of components from legacy systems has become a reasearch focus of both software reuse and program comprehension for its lower cost and high efficiency. In this paper, we analyze the independence metrics of component for object-oriented software system from the perspective of coupling, cohesion and scale. Then, we propose a software partition decoupling method based on interactive genetic algorithm. By the user adjusting individuals fitness value, reduce the crossover and mutation probability, our method in obtaining reasonable component partition result while avoiding algorithm premature convergence.

Dynamic change handling for inter-organisational workflows in open virtual eMarketplaces

Electronic marketplaces (eMarketplaces) help companies react more flexibly to customer demands by automating various types of transactions online. However, despite this advantage, eMarketplaces pose significant challenges in respect of change management for the participating companies, due to lack of central control, information opacity and heterogeneity of information systems. In order to address these problems, this paper presents an agent-based framework for handling change in dynamic inter-organisational workflows (ADIOF) in virtual environments. The framework utilises the unique strengths of agent technology such as autonomy, intelligence and collaboration, which enables formation of virtual organisations and adaptive and dynamic coordination of inter-organisational workflows (IOWs). The framework also adopts software component technology to enable plug-and-play style interaction protocols among agent systems. The key ideas of the framework are illustrated using an example case. A proof-of-concept implementation of ADIOF is also presented.

RELIABILITY MODEL FOR COMPONENT-BASED SYSTEMS IN COSMIC (A CASE STUDY)

Software component technology has a substantial impact on modern IT evolution. The benefits of this technology, such as reusability, complexity management, time and effort reduction, and increased productivity, have been key drivers of its adoption by industry. One of the main issues in building component-based systems is the reliability of the composed functionality of the assembled components. This paper proposes a reliability assessment model based on the architectural configuration of a component-based system and the reliability of the individual components, which is usage- or testing-independent. The goal of this research is to improve the reliability assessment process for large software component-based systems over time, and to compare alternative component-based system design solutions prior to implementation. The novelty of the proposed reliability assessment model lies in the evaluation of the component reliability from its behavior specifications, and of the system reliability from its topology; the reliability assessment is performed in the context of the implementation-independent ISO/IEC 19761:2003 International Standard on the COSMIC method chosen to provide the component's behavior specifications. In essence, each component of the system is modeled by a discrete time Markov chain behavior based on its behavior specifications with extended-state machines. Then, a probabilistic analysis by means of Markov chains is performed to analyze any uncertainty in the component's behavior. Our hypothesis states that the less uncertainty there is in the component's behavior, the greater the reliability of the component. The system reliability assessment is derived from a typical component-based system architecture with composite reliability structures, which may include the composition of the serial reliability structures, the parallel reliability structures and the p-out-of-n reliability structures. The approach of assessing component-based system reliability in the COSMIC context is illustrated with the railroad crossing case study.

Dynamic service deployment in a distributed heterogeneous cluster based router (DHCR)

This paper presents the design, implementation and evaluation of an extensible, scalable and distributed heterogeneous cluster based programmable router, called DHCR (Distributed Heterogeneous Cluster based Router), capable of supporting and deploying network services at run time. DHCR is a software IP router relying on heterogeneous cluster composed of separated computers with different hardware and software architecture capabilities, running different operating systems and interconnected through a high speed network connection. The DHCR ensures dynamic deployment of services and distributed control of router components (forwarding and routing elements) over heterogeneous system environments. The DHCR combines the IETF ForCES (Forwarding and Control Element Separation) architecture with software component technologies to meet the requirements of the next generation software routers. To ensure reliable and transparent communication between separated, decentralized and heterogeneous router components, the CORBA based middleware technology is used to support the DHCR internal communication. The paper also explores the use of the CORBA Component Model (CCM) to design and implement a modular, distributed and heterogeneous forwarding path for the DHCR router architecture. The CCM based forwarding plane ensures dynamic reconfiguration of the data path topology needed for low-level service deployment. Results on achievable performance using the proposed DHCR router are reported.

Reusing semi-specified behavior models in systems analysis and design

As the structural and behavioral complexity of systems has increased, so has interest in reusing modules in early development phases. Developing reusable modules and then weaving them into specific systems has been addressed by many approaches, including plug-and-play software component technologies, aspect-oriented techniques, design patterns, superimposition, and product line techniques. Most of these ideas are expressed in an object-oriented framework, so they reuse behaviors after dividing them into methods that are owned by classes. In this paper, we present a crosscutting reuse approach that applies object-process methodology (OPM). OPM, which unifies system structure and behavior in a single view, supports the notion of a process class that does not belong to and is not encapsulated in an object class, but rather stands alone, capable of getting input objects and producing output objects. The approach features the ability to specify modules generically and concretize them in the target application. This is done in a three-step process: designing generic and target modules, weaving them into the system under development, and refining the combined specification in a way that enables the individual modules to be modified after their reuse. Rules for specifying and combining modules are defined and exemplified, showing the flexibility and benefits of this approach.

Combining data sharing with the master–worker paradigm in the common component architecture

Software component technologies are being accepted as an adequate solution for handling the complexity of applications. However, existing software component models tend to be specialized to some types of resource architectures (e.g. in-process, distributed environments, etc.) and/or do not provide a very high level of abstraction. This paper focuses on handling data sharing on operation invocations between components as a solution allowing applications to be efficiently executed on all kinds of resources. In particular, the data sharing pattern appears in master---worker applications, when workers need to access only a part of a large piece of data, either in read or write mode. This approach is applied to the Common Component Architecture model. Its benefits are discussed using an image rendering application.

Marketing challenges in the software component business

Software components are complex, technology-intensive products that require special competencies not only from the people who are developing the components, but also from the people who market and sell the components. Technical challenges and competencies have already been discussed rather extensively in literature in terms of software component engineering; however, somewhat surprisingly, the marketing aspects have not yet been the foci of current research. In this paper, we aim to fill from our own end the gap in research on how to market software components. The purpose of this paper is to increase our knowledge about the challenges related to marketing commercial software components and to make propositions as to how to overcome these challenges. As the pre-existing literature about marketing commercial software components is still rather non-existent, the present study has a strong empirical focus and follows inductive research methods.