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1.
开放对象结构的规范化   总被引:2,自引:0,他引:2  
开放对象模型是一个依循环辨证法并按系统论观察世界,同时集成AI,OO和DB三个领域知识,具有自组织,自我进化能力的智能模型,本文采用有向图可视化它的结构,并形式地讨论它的一般结构:标记有向图以及特殊结构树图和分级图等。  相似文献
2.
协同创新设计在实体造型中的应用*   总被引:2,自引:0,他引:2       下载免费PDF全文
敏捷制造是设计制造业为了应对日益加剧的市场竞争而提出的一个制造理念,通过增强对产品的设计、制造、后期销售各个阶段的管理来增强企业的竞争力。鉴于产品的设计阶段在其整个生命周期的关键地位,从两个方面对以往的设计模式加以改进,从而提高设计速度。提取目标产品的关键特征,利用进化计算对其进化,产生多个具体模型,为设计者提供初步的设计思路;多个设计者同时对同一目标展开协同设计,加快设计进度。  相似文献
3.
一种基于目标的过程实例演化方法   总被引:1,自引:0,他引:1       下载免费PDF全文
陈诚  顾毓清 《软件学报》2002,13(8):1345-1351
过程具有长生命周期、分布式结构、异构等特性.为适应不可预料的环境变化,过程还需要不断地演化.提出一种过程实例的演化方法以控制对过程实例的改变.它可以检查并保证演化前后的过程实例具备"基于目标的行为一致性",从而避免用户对过程的盲目修改.目标作为行为一致的标准,需要分析演化后的过程实例来保证它可以完成目标.通过用Büchi自动机描述过程实例和其目标的语义,一个过程实例是否能够完成其目标是可判定的.  相似文献
4.
The scale and complexity of product lines means that it is practically infeasible to develop a single model of the entire system, regardless of the languages or notations used. The dynamic nature of real-world systems means that product line models need to evolve continuously to meet new customer requirements and to reflect changes of product line artifacts. To address these challenges, product line engineers need to apply different strategies for structuring the modeling space to ease the creation and maintenance of models. This paper presents an approach that aims at reducing the maintenance effort by organizing product lines as a set of interrelated model fragments defining the variability of particular parts of the system. We provide support to semi-automatically merge fragments into complete product line models. We also provide support to automatically detect inconsistencies between product line artifacts and the models representing these artifacts after changes. Furthermore, our approach supports the co-evolution of models and their respective meta-models. We discuss strategies for structuring the modeling space and show the usefulness of our approach using real-world examples from our ongoing industry collaboration.  相似文献
5.
该文提出一个面向网络化制造的产品再配置概念模型.该模型突出配置过程的动态特性,在分析了基于版本模型的部件、配置模型演化方式以及两者在演化过程中的相互影响的基础上,给出在集成产品配置的产品数据管理系统中对部件演化和模型演化进行跟踪和记录的方法,以实现产品再配置.该模型具有较强的时态描述能力,可广泛应用在网络化制造系统中.最后还提出了一个面向网络化制造的产品再配置结果相关度匹配算法.  相似文献
6.
A system documentation process maturity model and assessment procedure were developed and used to assess 78 projects at 28 different companies over a five year period. During this time the original version evolved into second and third versions based on feedback from industry and the experience gained from the assessments. The changes to the model, maturity levels, key practices, scoring scheme and assessment report, and the reasons behind these changes are analyzed in this paper. The biggest lesson learned is that the key practices' degree of satisfaction and not the maturity levels drive the assessment and provide the key information needed for process improvement.  相似文献
7.
EOS , für: Evolution?re objektorientierte Software-Entwicklung) vorgestellt und in den Vergleich einbezogen. Es verzichtet vollst?ndig auf die überkommene Phasenstruktur und knüpft Zyklen und T?tigkeitsschritte in systematischer Weise an die Bausteine der Software-Entwicklung (System, Komponenten, Klassen, Subsysteme). Management-Verfahren, die auf diesem Schema aufsetzen, erlauben eine besser angepa?te, flexiblere und differenzierte Projektplanung und -steuerung. Eingegangen am 05.09.1996, in überarbeiteter Form am 09.12.1996  相似文献
8.
Software product line (SPL) techniques handle the construction of customized systems. One of the most common representations of the decisions a customer can make in SPLs is feature models (FMs). An FM represents the relationships among common and variable features in an SPL. Features are a representation of the characteristics in a system that are relevant to customers.FMs are subject to change since the set of features and their relationships can change along an SPL lifecycle. Due to this evolution, the consistency of FMs may be compromised. There exist some approaches to detect and explain inconsistencies in FMs, however this process can take a long time for large FMs.In this paper we present a complementary approach to dealing with inconsistencies in FM evolution scenarios that improves the performance for existing approaches reducing the impact of change to the smallest part of an FM that changes. To achieve our goal, we formalize FMs from an ontological perspective and define constraints that must be satisfied in FMs to be consistent. We define a set of primitive operations that modify FMs and which are responsible for the FM evolution, analyzing their impact on the FM consistency. We propose a set of predefined strategies to keep the consistency for error-prone operations.As a proof-of-concept we present the results of our experiments, where we check for the effectiveness and efficiency of our approach in FMs with thousands of features. Although our approach is limited by the kinds of consistency constraints and the primitive operations we define, the experiments present a significant improvement in performance results in those cases where they are applicable.  相似文献
9.
利用3种博弈模型研究信息安全中的攻防策略。讨论不完全信息动态攻防博弈模型下的攻防均衡关系,得到均衡时的策略选择及参数限制条件。考虑攻防的长期和重复性,建立不完全信息下的重复攻防博弈模型,得到长期均衡关系。针对信息安全中攻防双方不能在完全理性情况下进行策略选择的问题,引进有限理性假设条件,运用复制动态求解进化稳定策略,在验证前两个模型结论有效的基础上,进一步得到解决信息安全问题的有效策略。  相似文献
10.
孙为军  李师贤  严玉清 《计算机科学》2012,39(7):123-126,143
模型演化由一系列复杂的变化活动组成,要遵循一定的约束以保持模型的某些特性。以一个实例描述模型演化的过程,并以集值映射为基础,定义模型成分与语义域的映射,通过定义模型演化的语义函数,研究模型演化的语法和语义性质,包括特性保持、一致性、等价性和吸收性等。  相似文献
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