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构件演化是指构件根据用户的需求和技术的变化而不断改变,它是由一系列复杂的变化活动组成的。分析了构件演化的特点及其对度量的影响,根据GQM度量定义模型,给出了构件演化过程中的主要度量。希望通过度量和测评,能够有效地对构件演化进行控制,保持构件系统的一致性和稳定性。 相似文献
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业务构件可信性的度量研究 总被引:1,自引:0,他引:1
业务构件的质量必然是满足构件使用者的基本前提,而业务构件的可信则全面体现了业务构件的质量。本文给出了业务构件可信性的度量原则,在此基础上给出了可信业务构件的度量模型与量化方法,并重点阐述了逻辑可信性的度量思路。 相似文献
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基于软件构件质量模型的度量及应用 总被引:10,自引:0,他引:10
随着软件复用实践的深入,可复用构件数量不断增加,构件库规模也不断扩大。构件的质量将影响到最终的软件质量和CBSD的推广应用,但是目前缺乏对构件质量有效的评价模型。本文基于ISO/IEC9126软件质量度量模型,提出了软件构件质量模型,及专门针对软件构件质量模型的可操作的度量方法,重点描述了构件可复用性的度量,并将该方法实际应用于上海构件库部分构件,本文提出的度量模型和方法可作为构件库管理者和构件用户在管理及使用构件时对构件进行评价参考。 相似文献
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基于构件的软件复用被看成是提高软件生产率和软件质量的有效途径,被称为是有效解决软件危机的方法之一。近几年来,随着基于构件的软件工程的发展,构件的度量方法有了很大的发展。但多是研究可复用性,对构件的内聚耦合研究较少。而有效的系统分解是构件获取的主要手段,它为构件的复用提供了强有力的支持。文章在对系统分解后,以构件的内聚耦合度量为研究重心,利用其度量结果,再对构件可复用性进行研究。文章以有向带权依赖图为基础,运用图的谱分割技术,及结合信息熵技术的构件内聚耦合度量方法,实现对构件的自动聚集和自动度量。实验结果表明,图的谱分割技术能够较合理、有效的分解系统,文章中的度量方法是一种较准确的软件构件度量方法,为权衡构件的设计质量提供了可靠的数据。 相似文献
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随着基于构件软件开发实践的深入,构件的质量将影响到最终的软件质量,但目前缺乏对构件在实际应用中有效的评价模型.基于Perry所提出的度量方法,给出了应用在UML中的度量模型,并且设计实现了对应的度量工具,以便构件使用者能够在实际开发应用中找出合适的构件. 相似文献
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基于SCORM的开放式内容对象及其运行环境的设计 总被引:4,自引:1,他引:4
在分析了目前现有远程教育技术规范特点的基础上,提出了一种开放式内容对象的组件模型,该组件模型能给可共享Web学习内容的结构与顺序设计提供一种更为灵活高效的方法。首先将学习内容的组成单元设计成具有请求服务与提供服务功能的开放式内容对象OCO,使内容组件不仅可以通过聚集组合成更高级的教学单元,还可以在学习过程中通过以学习管理系统作为中转的消息传递机制形成可互操作的关联关系。最后,通过对ADL的SCORM规范运行环境的扩充,为开放式内容对象OCO在不同的学习管理系统间的运行设计了一个通用运行环境。 相似文献
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《计算机辅助绘图.设计与制造(英文版)》2015,(3)
In this paper, we propose a parametric modeling method to reconstruct the Hui-Style and solve the problem that the user can't effectively reconstruct the Hui-Style three dimensional models because of the various style and complicated structure of Hui-Style components. This model includes summarizing and defining a variety of Hui-Style components parameter types. Determine the relationship between the parameter according to building formulas and design the parametric modeling process. First, set the depth of platform as the given user value. Then, calculate the component properties and the corresponding size according to the style of the Hui-Style architecture components and the constraint relation between Hui-Style architecture components. This needs only one parameter that is needed as the basic parameter in this method and the entire modeling process can be achieved based on it. The experimental result shows that the proposed method can well solve the complex parameters relationship of the Hui-Style architecture components and help the general users to construct the Hui-Style architecture components more effective. 相似文献
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铜闪速熔炼过程冰铜品位预测模型的研究与应用 总被引:1,自引:0,他引:1
针对铜闪速熔炼过程中的冰铜品位在线检测难题,在组元分析的基础上,研究了独立化学反应以及组分间的摩尔数关系,并建立了数学模型;但由于反应机理的复杂性与建模时的简化,冰铜品位预测精度难以满足实际应用的要求.同时基于工业数据,建立了神经网络冰铜品位预测模型,它能很好地描述训练样本数据之间的关系,但泛化能力不强.为克服单一模型的局限性,引入了包含自适应调整隶属度函数的模糊协调器;将数学模型和神经网络模型有机结合,提出了一种冰铜品位智能集成预测模型.工业数据验证了模型的有效性. 相似文献
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针对从业者不论是想从本地模型库还是线上共享网站获取所需的BIM 模型只能靠
逐个查找、人工识读的方法,而模型的数量越来越多,获取符合需求的模型需要花费大量的时
间和人力的问题,提出了一种构件级BIM 模型相似度计算方法。从模型的构件出发,以BIM
通用交互格式工业基础类(IFC)文件作数据源,以通用数据标准IFC 2×3 为数据基础,首先提取
模型中构件的几何信息、语义信息等,并利用改进的方向包围盒(OBB)碰撞检测算法查找相连
构件;然后以构件为顶点、构件间连接关系为边将BIM 模型构建为邻接图模型,并用图编辑距
离算法计算邻接图模型的编辑距离;最后即可计算出不同模型之间的相似度。该方法以构件级
BIM 模型的相似度为依据可以大大提升BIM 模型的检索速度与准确率。 相似文献
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In this paper, we consider a bunker fuel management strategy study for a single shipping liner service. The bunker fuel management strategy includes three components: bunkering ports selection (where to bunker), bunkering amounts determination (how much to bunker) and ship speeds adjustment (how to adjust the ship speeds along the service route). As these three components are interrelated, it is necessary to optimize them jointly in order to obtain an optimal bunker fuel management strategy for a single shipping liner service. As an appropriate model representing the relationship between bunker fuel consumption rate and ship speed is important in the bunker fuel management strategy, we first study in detail this empirical relationship. We find that the relationship can be different for different sizes of containerships and provide an empirical model to express this relationship for different sizes of containerships based on real data obtained from a shipping company. We further highlight the importance of using the appropriate consumption rate model in the bunker fuel management strategy as using a wrong or aggregated model can result in inferior or suboptimal strategies. We then develop a planning level model to determine the optimal bunker fuel management strategy, i.e. optimal bunkering ports, bunkering amounts and ship speeds, so as to minimize total bunker fuel related cost for a single shipping liner service. Based on the optimization model, we study the effects of port arrival time windows, bunker fuel prices, ship bunker fuel capacity and skipping port options on the bunker fuel management strategy of a single shipping liner service. We finally provide some insights obtained from two case studies. 相似文献
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Anne E. Haxthausen 《International Journal of Software and Informatics》2009,3(2):241-272
In this paper we stepwise develop a domain model for relay circuits as used in railway control systems. First we provide an abstract, property-oriented model of networks consisting of components that can be glued together with connectors. This model is strongly inspired by a network model for railways made by Bj.rner et. al., however our model is more general: the components can be of any kind and can later be re.ned to e.g. railway components or circuit components. Then we show how the abstract network model can be re.ned into an explicit model for relay circuits. The circuit model describes the statics as well as the dynamics of relay circuits, i.e. how a relay circuit can be composed legally from electrical components as well as how the components may change state over time. Finally the circuit model is transformed into an executable model, and we show how a concrete circuit can be de.ned, checked to be legal, and the reaction to an input can be simulated. 相似文献