In order to assure quality and control process in the development of the aircraft collaborative design software, a maturity assessment model is proposed. The requirements designing—house of quality is designed to eva...In order to assure quality and control process in the development of the aircraft collaborative design software, a maturity assessment model is proposed. The requirements designing—house of quality is designed to evaluate the maturity degree of the solution, and the evaluation results can help to manage and control the development process. Furthermore, a fuzzy evaluation method based on the minimum deviation is proposed to deal with the fuzzy information. The quantitative evaluation result of the maturity degree can be calculated by optimizing the semantic discount factor aim for the minimum deviation. Finally, this model is illustrated and analyzed by an example study of the aircraft collaborative design software.展开更多
为了改善软件的质量和生产性,注目于与其密切相关的软件结构.首先,讨论了现有方法中软件结构分析和设计的问题;然后根据质量设计中的质量屋HOQ(house of quality)与产品设计中的工程图之间的相似性,将质量功能展开QFD(quality function ...为了改善软件的质量和生产性,注目于与其密切相关的软件结构.首先,讨论了现有方法中软件结构分析和设计的问题;然后根据质量设计中的质量屋HOQ(house of quality)与产品设计中的工程图之间的相似性,将质量功能展开QFD(quality function deployment)中的质量屋HOQ概念扩展成一种软件描述工具,并引入H.A.西蒙的系统准分解可能性原理,提出了基于数量化理论3类QMT3(quantification method of type 3)的软件定量结构化方法,再通过与现有方法的比较分析,阐明了该方法的特点;最后,通过应用实例验证了该方法对软件结构分析和设计的有效性.因而为软件质量保证提供了有力的支持.展开更多
软件定义网络与网络功能虚拟化的发展,使得运营商可以更加灵活的根据用户请求部署服务功能链(Service Function Chains,SFC)为用户提供服务.当前对SFC部署方法的研究大多考虑了运营商的利益,不考虑用户体验到的服务质量(Quality of Serv...软件定义网络与网络功能虚拟化的发展,使得运营商可以更加灵活的根据用户请求部署服务功能链(Service Function Chains,SFC)为用户提供服务.当前对SFC部署方法的研究大多考虑了运营商的利益,不考虑用户体验到的服务质量(Quality of Service,QoS)或是考虑的维度单一.鉴于此,提出了一种用户QoS与网络资源感知的服务功能链部署方法SA-TS,该方法综合考虑用户多个维度的QoS需求与运营商的成本,形式化描述了底层资源的约束条件,用时延、服务可用性、链路丢包及拥塞刻画了用户需求.SA-TS方法首先利用模拟退火算法构造了一个满足约束条件的启发式的初始解,然后结合禁忌搜索算法的记忆功能,在该可行解的邻域构造了一组候选解,最后利用禁忌表使候选解朝最小化运营商成本的目标函数不断移动寻优,直到得到最优解.仿真结果表明,该方法在有限的网络资源中很好的保证了用户对服务的QoS需求,得到的解的质量较高,相比于GLR和GLT两种方法,部署成功率平均提高了11%,链路拥塞率平均降低了16%.展开更多
基金supported by the National Natural Science Foundation for Youth of China(61802174)the Natural Science Foundation for Youth of Jiangsu Province(BK20181016)+1 种基金the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(18KJB520019)the Scientific Research Foundation of Nanjing Institute of Technology of China(YKJ201614)
文摘In order to assure quality and control process in the development of the aircraft collaborative design software, a maturity assessment model is proposed. The requirements designing—house of quality is designed to evaluate the maturity degree of the solution, and the evaluation results can help to manage and control the development process. Furthermore, a fuzzy evaluation method based on the minimum deviation is proposed to deal with the fuzzy information. The quantitative evaluation result of the maturity degree can be calculated by optimizing the semantic discount factor aim for the minimum deviation. Finally, this model is illustrated and analyzed by an example study of the aircraft collaborative design software.
文摘为了改善软件的质量和生产性,注目于与其密切相关的软件结构.首先,讨论了现有方法中软件结构分析和设计的问题;然后根据质量设计中的质量屋HOQ(house of quality)与产品设计中的工程图之间的相似性,将质量功能展开QFD(quality function deployment)中的质量屋HOQ概念扩展成一种软件描述工具,并引入H.A.西蒙的系统准分解可能性原理,提出了基于数量化理论3类QMT3(quantification method of type 3)的软件定量结构化方法,再通过与现有方法的比较分析,阐明了该方法的特点;最后,通过应用实例验证了该方法对软件结构分析和设计的有效性.因而为软件质量保证提供了有力的支持.
文摘软件定义网络与网络功能虚拟化的发展,使得运营商可以更加灵活的根据用户请求部署服务功能链(Service Function Chains,SFC)为用户提供服务.当前对SFC部署方法的研究大多考虑了运营商的利益,不考虑用户体验到的服务质量(Quality of Service,QoS)或是考虑的维度单一.鉴于此,提出了一种用户QoS与网络资源感知的服务功能链部署方法SA-TS,该方法综合考虑用户多个维度的QoS需求与运营商的成本,形式化描述了底层资源的约束条件,用时延、服务可用性、链路丢包及拥塞刻画了用户需求.SA-TS方法首先利用模拟退火算法构造了一个满足约束条件的启发式的初始解,然后结合禁忌搜索算法的记忆功能,在该可行解的邻域构造了一组候选解,最后利用禁忌表使候选解朝最小化运营商成本的目标函数不断移动寻优,直到得到最优解.仿真结果表明,该方法在有限的网络资源中很好的保证了用户对服务的QoS需求,得到的解的质量较高,相比于GLR和GLT两种方法,部署成功率平均提高了11%,链路拥塞率平均降低了16%.
