中文摘要：

以自治计算的研究为背景，利用可废止逻辑理论的非单调知识表征和推理机制，提出一种能够动态接受规则变更、灵活处理实时发生的规则冲突，并进行高效的非单调推理的柔性Agent模型．这种Agent既是自主的，又是可控的，而且可以在开放、动态的环境中通过合同与其他Agent进行协同工作．

英文摘要：

In the context of autonomic computing, by taking advantage of the non-monotonic knowledge representation and reasoning mechanisms of defeasible logic, a flexible Agent model is proposed, which is capable of accepting the real-time rule modifications, flexibly handling the run-time rule conflicts, and providing efficient non-monotonic reasoning functions. The flexible agent is both autonomous and controllable, and is able to cooperate with other Agents via contracts in an open and dynamic environment.