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中文摘要：
立足于任务这个高层次的用户需求，结合对象、任务、条件、时间和能力这5个方面的内容，通过对可用度A、可信赖度D和能力C的分析，提出了基于ADC评估方法的信息系统生存能力评价模型．实例分析表明，该模型有效地结合了用户的实际需求，并且能够根据系统生存能力的评判结果给出相应的改进建议，以便能在有限的资源下尽可能提高信息系统的生存性，在恶意环境下顺利完成任务．
英文摘要：
In order to satisfy the high-level user requirements from tasks, this paper analyzes the availability, dependence and capability （ADC） by considering five factors, i.e., object, task, condition, time and ability, and proposes an ADC-based survivability evaluation model for information systems. Case analysis shows that the presented model can meet the practical needs from the users, and can give effective suggestions for the information system according to the evaluation results of system survivability. Therefore, survivability of the information s~,stem can be improved with limited resources and the tasks can be successfully fulfilled in hostile environments.
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