Softw are Maintainability Evaluation Based on Software Configuration Management Data

As one of the most important attributes of software quality, software maintainability has been widely recognized.However,the existing maintainability evaluation methods are mostly based on subjectively judgment. Thus it is inapplicable or unbelievable. To evaluate software maintainability objectively,the software configuration management( SCM) data are collected to establish a maintainability model. Based on the hidden Markov chain( HMC), a three-state maintainability estimation model is constructed. To validate the feasibility of the model,a real software example of software maintenance activity is given and the result from the example shows the effectiveness of the proposed method.

Recommender System for Configuration Management Process of Entrepreneurial Software Designing Firms

The rapid growth in software demand incentivizes software development organizations to develop exclusive software for their customers worldwide.This problem is addressed by the software development industry by software product line(SPL)practices that employ feature models.However,optimal feature selection based on user requirements is a challenging task.Thus,there is a requirement to resolve the challenges of software development,to increase satisfaction and maintain high product quality,for massive customer needs within limited resources.In this work,we propose a recommender system for the development team and clients to increase productivity and quality by utilizing historical information and prior experiences of similar developers and clients.The proposed system recommends features with their estimated cost concerning new software requirements,from all over the globe according to similar developers’and clients’needs and preferences.The system guides and facilitates the development team by suggesting a list of features,code snippets,libraries,cheat sheets of programming languages,and coding references from a cloud-based knowledge management repository.Similarly,a list of features is suggested to the client according to their needs and preferences.The experimental results revealed that the proposed recommender system is feasible and effective,providing better recommendations to developers and clients.It provides proper and reasonably well-estimated costs to perform development tasks effectively as well as increase the client’s satisfaction level.The results indicate that there is an increase in productivity,performance,and quality of products and a reduction in effort,complexity,and system failure.Therefore,our proposed system facilitates developers and clients during development by providing better recommendations in terms of solutions and anticipated costs.Thus,the increase in productivity and satisfaction level maximizes the benefits and usability of SPL in the modern era of technology.

Online Fault Detection Configuration on Equipment Side of a Variable-Air-Volume Air Handling Unit

With the development of the technology of the Internet of Things,more and more operational data can be collected from air conditioning systems.Unfortunately,the most of existing air conditioning controllers mainly provide controlling functions more than storing,processing or computing the measured data.This study develops an online fault detection configuration on the equipment side of air conditioning systems to realize these functions.Modbus communication is served to collect real-time operational data.The calculating programs are embedded to identify whether the measured signals exceed their limits or not,and to detect if sensor reading is frozen and other faults in relation to the operational performance are generated or not.The online fault detection configuration is tested on an actual variable-air-volume(VAV)air handling unit(AHU).The results show that the time ratio of fault detection exceeds 95.00%,which means that the configuration exhibits an acceptable fault detection effect.

A Study of Performance Testing in Configurable Software Systems

Customizing applications through program configuration options has been proved by many open-source and commercial projects as one of the best practices in software engineering. However, traditional performance testing is not in synch with this industrial practice. Traditional performance testing techniques consider program inputs as the only external factor. It ignores the performance influence of configuration options. This study aims to stimulate research interest in performance testing in the context of configurable software systems by answering three research questions. That is, why it is necessary to conduct research in performance testing, what are the state-of-the-art techniques, and how do we conduct performance testing research in configurable software systems. In this study, we examine the unique characteristics and challenges of performance testing research in configurable software systems. We review and discuss research topics on the performance bug study, performance anti-patterns, program analysis, and performance testing. We share the research findings from the empirical study and outline the opening opportunities for new and advanced researchers to contribute to the research community.

A Domain Engineering Approach to Increase Productivity in the Development of a Service for Changes Notification of the Configuration Management Database

This paper presents a domain engineering approach to build a software product line that supports the change notification service in a Configuration Management Database (CMDB) according to the Information Technology Infrastructure Library (ITIL) best practices. For the development of this product line, the proposed approach makes use of a construction of products methodology by analogy: this is a new notation which reports the variability of the products, obtaining metrics as important as the number of products and uses a language that enables, by means of the flexibilization of a product and the development of some generators, to build the rest of the product line. In addition the paper offers a standard for the analysis and design of the CMDB as well. Finally, the paper presents an economic model for the product line, where the profitability and productivity of the proposed solution are analyzed.

The Report of Virtual Exhibition Software Development

The main structure and key techniques of our Virtual Exhibition Software are summarized. It demonstrates the practice of Software Engineering during the development of our project and discusses the use of UML in it.

STPSO: Optimal Configuration for Cloud Environments

With the increasing number of resources provided by cloud environments, identifying which types of resources should be rent when deploying an application is often a difficult and error-prone process. Currently, most cloud environments offer a wide range of configurable resources, which can be combined in many different ways. Finding an appropriate configuration under cost constraints while meeting requirements is still a challenge. In this paper, software product line engineering is introduced to describe cloud environments, and configurable resources are abstracted as features with attributes. Then, a Self-Tuning Particle Swarm Optimization approach(called STPSO) is proposed to configure the cloud environment. STPSO can automatically adjust the arbitrary configuration to a valid configuration. To evaluate the performance of the proposed approach, we conduct a series of comprehensive experiments. The empirical experiment shows that our approach reduces time and provides a reliable way to find a correct and suitable cloud configuration when dealing with a significant number of resources.

An Interactive Method for Validating Stage Configuration

Software product Line (SPL) is an emerging methodology for developing software products. Stage-configuration is one the important processes applying to the SPL. In stage-configuration, different groups and different people make configuration choices in different stages. Therefore, a successful software product is highly dependent on the validity of stage-configuration process. In this paper, a rule-based method is proposed for validating stage-configuration in SPL. A logical representation of variability using First Order Logic (FOL) is provided. Five operations: validation rules, explanation and corrective explanation, propagation and delete-cascade, filtering and cardinality test are studied as proposed operations for validating stage-configuration. The relevant contributions of this paper are: implementing automated consistency checking among constraints during stage-configuration process based on three levels (Variant- to-variant, variant-to-variation point, and variation point-to-variation point), define interactive explanation and corrective explanation, define a filtering operation to guide the user within stage-configuration, and define (explicitly) delete-cascade validation.

Improving Information Technology Infrastructure Library Service Delivery Using an Integrated Lean Six Sigma Framework: A Case Study in a Software Application Support Scenario

Increasing competition in service businesses (eg: Information Technology, Healthcare, Education, Logistics, Distribution, Hospitality Financial and other services) is compelling corporates to adopt business improvement philosophies and methodologies for addressing customer demands for better quality service and organizational demands for improving the profit margins through cost reduction. Many companies around the world have already implemented Information Technology Infrastructure Library (ITIL) as a way to manage and control their Information Technology (IT) Departments more effectively. These companies are now willing to improve their ITIL processes in order to become even more efficient. Lean Six Sigma is a methodology that has been suggested as a means to resolve these problems, reducing costs and improving quality. Its application in the IT Services area is becoming increasingly popular among researchers and academicians and can be used to conduct these improvements. Despite the application of lean six sigma approaches to different contexts in the service sector, the application of Lean Six Sigma approaches in service delivery specific to Information Technology Service Management (ITSM) remains largely untested. The purpose of this paper is to implement Integrated Lean Six Sigma for Software application support services and evaluate the benefits of continual service improvement over ITIL.

Component versioning for protocol configuration management

Classical software configuration management which deals with source code versioning becomes insufficient when most components are distributed in binary form. As an important aspect of software configuration, protocol configuration also encounters those problems. This paper focuses on solving protocol component versioning issues for protocol configuration man- agement on embedded system, incorporating the following versioning issues: version identification, version description and protocol component archiving and retrieving based on the version library.

基于PKS系统的造纸工业生产计算机监控系统设计

造纸生产过程呈现出连续性特点,然而涉及到的生产装置则较为多元,再加上独特的工艺,使得这些装置在分布方面呈现出较高的分散性。为此,对制浆造纸生产过程加以统一管控就显得极为必要,降低生产成本和精准控制是必然趋势。如何使得生产过程有着更高的安全性,并能实时准确监控现场,就变得颇为关键。立足于造纸工艺,综合通信、自动化技术、PKS系统(霍尼韦尔公司开发)等技术,完成以PKS系统为基础的监控系统开发与实现。

基于MCGS组态软件的板材雕刻机控制系统设计

板材雕刻机是一种用于在板材上进行雕刻、切割、剪裁的机器。为提高雕刻机的速度和精度,并研究其在控制方面的应用,通常采用PLC控制伺服电机带动刀头进行精确的雕刻操作。板材雕刻机可以根据预先设计好的图案或模型进行雕刻,广泛应用于家具制造、建筑装饰、艺术品制作等领域。在板材雕刻机的控制系统中,通过MCGS组态软件,可以直观地反映雕刻过程,并精确地控制雕刻机进行预设图案的雕刻。通过优化控制、调整运动路径和采用高精度的传感器和编码器,可以大大提高雕刻机的速度和精度,实现更精细的雕刻效果。控制系统还能实时监测刀头位置和状态,及时调整雕刻参数,保证雕刻结果的准确性。

基于力控组态软件的光伏微电网远程监控系统的设计

为提高光伏微电网的自动化程度和能源利用效率,保证光伏微电网安全稳定运行,以智慧新能源实训系统V2.0为研究基础,基于力控组态软件设计开发了光伏微电网远程监控系统。该系统由上位监控机和前端数据采集单元组成。数据采集模块以西门子S7-1200plc控制器为核心,通过RS485通信总线,将环境模拟平台的太阳光照度、温度、湿度、太阳倾角等数据采集传输给PLC控制器。PLC控制器通过PROFENET通信,将采集数据传输给力控组态软件,以达到实时数据采集、监测显示、管理控制等远程控制的目的。

基于WINCC的风力发电在线监测系统

本文利用西门子1200PLC和WINCC组态软件,结合传感器技术、计算机网络技术,引进残差、阅值构建了风力发电在线监测系统。系统能够对风力发电关键参数温度、电流、电压、速度等进行监测,也可通过关键参数的监测实现系统的在线监测以及故障的记录、报警和故障部位的显示。

某大型水厂自控系统改造实践

合肥某水厂目前总生产规模60万m^(3)/d,深度处理规模90万m^(3)/d,占地面积包括取水泵房部分合计390亩,为安徽省目前供水规模最大的水厂。水厂扩建改造内容为:现状1~2期60万m^(3)/d深度处理改造工程;新建3期30万m^(3)/d常规处理及深度处理扩建工程;深度处理配套附属设施。全厂组态软件、信息系统、安防系统按全厂90万m^(3)/d规模(含1、2、3期)开发部署。

可配置化卫星电子学半物理仿真系统设计与实现

为提高商业卫星星务软件的研制效率,减少卫星部件产品研制进度对整星软件开发的影响,便于卫星批量研制生产,提出一种可配置化卫星电子学半物理仿真系统设计。该电子学仿真系统由中心计算机、通信接口部分、星上电子学单机仿真部分和系统测试部分组成,利用可配置化、通用化、高集成化和模块化设计思想,开发具有可配置化特点的中心计算机、灵活可配置多功能特点的星上电子学单机仿真模拟器、可重构的通信接口和智能化系统测试接口,集成一套可配置化卫星电子学仿真系统。以此仿真系统进行星务软件的开发测试实验,结果表明,该系统能够为整星提供半物理仿真实验数据,满足不同型号卫星星务软件的研制需求,同时具备接入实物单机进行仿真测试功能。该电子学仿真系统能够提高星务软件的研制效率,有利于卫星批量生产,具有重要的工程研制意义。

民用飞机刹车控制系统软件构型管理研究

民用飞机刹车控制系统构型管理在系统设计开发过程和适航符合性验证过程中发挥着关键作用。为了提升民用飞机刹车控制系统软件构型管理能力,使该系统设计开发的软件满足适航要求,介绍刹车控制系统软件构型管理的概念和方法,描述如何运用系统思维和信息化流程手段将构型管理和软件设计相结合,开展软件全生命周期过程构型管理活动。结合DO-178C的要求,提出建立以产品构型为核心的构型数据数字化管理机制,实现刹车控制系统软件研制的单一数据源。结果表明:通过与构型基线管理相结合建立一个统一的构型数据库,在该构型数据库中严格按照阶段的状态进行准确记录,确保了状态信息的实时性、可追溯性、完整性及有效性,达到了最终构型控制目标,可以满足适航要求。

组态软件Web化的分析与设计

分析传统组态软件面临的问题,结合组态软件的技术特点与使用场景,提出一种针对传统组态软件Web化的设计方案,包括系统架构、Web前端界面和后台程序。根据实际应用场景增加了线程池方案,提高了后台程序的执行效率。该设计方案应用在ECS-700neo工业控制系统组态软件中,系统测试结果表明:达到了Web化预期效果。

基于CSCW的测绘专业虚拟仿真系统群设计与应用

为提升测绘专业的教学水平和虚拟仿真教学系统的开发效率,一种基于计算机支持协同工作(Computer Supported Cooperative Work,CSCW)机制的共享数字孪生组件的虚拟仿真系统群的设计方法应运而生,应用于测绘专业的自然资源相关领域的教学。通过对这一领域的教学问题进行汇总分析,研究其内容和相关特点,考虑对接国家实验平台的统一接口的需要,确定仿真群的可共享的基础数字孪生组件和软件基础功能组件,然后采用CSCW机制实现组件粒度的信息协同,用SCM进行软件架构的管理,促进自然资源的多个领域上的监管仿真教学平台的创建和升级。在实际教学工作的应用中,与传统单个仿真项目开发方式相比,仿真系统群的方法平均开发效率提升22.22%,项目质量提升15.3%,教学效率也得到提升。