A Context-Aware Software Adaptation Framework

对于在运行时响应于变化而动态地调整其行为的软件系统的需求日益增加。这些系统的研究已经进行了两个社区的研究人员有两个不同的重点：自适应和上下文意识。一方面，上下文感知的研究更多地关注如何对上下文信息进行建模、处理和管理，但局限于系统如何适应上下文信息中的意外变化。另一方面，自适应性的研究更多的是关于如何适应系统的结构和/或行为，以响应需求和/或上下文的变化（可能是意外的变化），较少关注上下文如何建模，处理和管理。在实践中，两者之间的界限是相当模糊的，一个上下文感知的自适应系统的工程需要考虑这两个方面的系统。

There is an increasing demand for software systems that dynamically adapt their behavior at runtime in response to changes. Research into these systems has been conducted by researchers from two communities with two different emphases: self-adaptivity and context-awareness. On one hand, research in context-awareness is more concerned with how to model, process, and manage the context information but limited on how a system adapts itself in response to unanticipated changes in the context information. On the other hand, research in self-adaptivity is more about how to adapt the system's structure and/or behavior in response to requirements and/or context changes (possibly unanticipated changes), with less attention to how context is modeled, processed, and managed. In practice, the line between the two is rather blurred, and the engineering of a context-aware adaptive system needs to consider both aspects in a systematic manner.