【摘要】 在态势觉察、态势理解及未来态势预测三级态势估计概念基础上首先分析了态势觉 察问题的本质特征；进一步详细讨论了所涉及到的基本事件提取、分群的实现方法；最后， 描述了整个态势觉察阶段的算法框架。更多还原

【Abstract】 In this paper, based on three-level conception of situation awarenes s, situation perception and situation prediction,the essential characteristic o f situation awareness is analyzed in detail. Methods of events extraction and cl ustering are brought forward. Then a fundamental algorithm of situation awarenes s is discussed.更多还原