成键理论与基于稳定依赖的构件优化设计

为提高构件的复用性能，在构件复用期间需要持续地优化改进，以消除构件设计中不适合于复用的语义与结构问题。为此，提出了一种基于稳定依赖的构件优化设计方法。该方法首先提出了用于刻画构件间稳定依赖关系的成键理论，给出了稳定性及稳定依赖的定义，建立了描述构件间变化传递关系的变化扩散图。在此基础上，使用变化封闭度作为刻画构件稳定性能的指标。随后，归纳了依据稳定性进行的优化设计策略，重点探讨了通过改进构件与服务间的包容关系，来提高构件稳定性能的途径，并简要给出了基于稳定依赖的构件优化设计过程。

Component bonding theory & stability dependency based component optimization design

To improve component reusability,continuous optimization in the whole reuse lifecycle was required to eliminate semantic and structural obstacles in component design.To solve this problem,a component optimization design method based on stability dependency was presented.Bonding theory was firstly introduced to describe the stability dependency among components.And stability and stability dependency were defined.The Change Propagation Graph(CPG) was constructed to depict the change propagation relationships and the corresponding propagation degree among components or services.Based on this,Change Closeness of Component was used to measure component's stability performance.Subsequently,optimization strategies based on stability dependency were summarized.The composition relationships among components and sesvices were discussed in particular so as to put forward channels for improvement of stability performance.Finally the practical optimization design process was also brought forward.