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Research and Application on Dynamic Combination of Semantic Component for Adaptive Middleware

Author: ZhaoChunBo
Tutor: HuWeiHua；WuQing
School: Hangzhou University of Electronic Science and Technology
Course: Applied Computer Technology
Keywords: Adaptive middleware Semantic component Behavioral equivalence Behavioral compatibility Components Composition
CLC: TP311.52
Type: Master's thesis
Year: 2009
Downloads: 35
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Abstract


With the rise of pervasive computing propose, and component-based software development model, component-based adaptive middleware research more and more people's attention. However, the traditional components still a lack of description of component behavior and interaction, leading to the component combination unforeseen difficult to meet complex needs service. During component composition is determined for the equivalence of the old and the new component behavior, as well as the compatibility analysis of the new components running in the system there are still the result of the determination is not precise enough, the lack of criteria and other issues. The same time, the process of the dynamic combination of components not analyze the adaptive capacity of the various combinations of behavior, nor does it compare and select a variety of adaptive behavior, which makes the overall system reliability, stability and efficiency greatly reduced. Expand research and practical work focuses on these issues, the introduction of the semantic component adaptive middleware, so that the system has the ability to self-adjust to accommodate changes in the external environment. Meanwhile, before the dynamic adjustment of the carrying member acts between the old and the new member based on the π-calculus equivalence analysis, and requires a new member to have a certain compatibility with the original operating system, at the same time the analysis was adjusted for each possible action comparison and choose, as far as possible, to ensure system reliability, stability and efficiency to meet user demand for services. The following is the main work of this paper: First, based on the syntax and operational semantics of the pi calculus, formal modeling component behavior, and then analyzed to determine the equivalence of the component behavior and compatibility. In the study of the equivalence of the component behavior, given the equivalence determination related theory, followed by a case-by-case analysis of component behavior equivalence, and finally the use of MWB tool for modeling and verify behavioral equivalence; research component behavior compatibility Firstly compatibility verification method, followed by a case-by-case analysis of the compatibility between the component behavior. The equivalence of the component behavior to ensure the consistency of the component functional behavior component replacement operations, as well as the matching of the component interface; component behavior compatibility guarantee the internal processes of the component composition structural correctness, to avoid the death of the component interaction process lock or unreachable state, to ensure stable and reliable operation of the system is normal. Secondly, based on the research work of the first few chapters Component Dynamic adaptive combination method. The concept of adaptive factor in the combination method used to measure the combined behavior adaptive capacity and adaptive factor for classification and calculation. After that, we give the member dynamic combination process, the combination of behavior based on the size of the adaptive factor to compare and choose. Finally, the dynamic adaptive combination of the methods based on the semantic member applied to the mobile music system, and given a specific system design and component development and implementation methods, ultimately enables the system to perceive changes in the context and dynamic adaptive member recombinant and verify that the system with adaptive ability to meet the high QoS requirements.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer software > Program design,software engineering > Software Engineering > Software Development
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