A scalable model for network situational awareness based on Endsley＇ s situation model

The paper introduces the Endsley's situation model into network security to describe the network security situation,and improves Endsley'S data processing to suit network alerts.The proposet model contains the information of incident frequency.incident time and incident space.The HoneyNet dataset is selected to evaluate the proposed model in the evaluation.The paper pmposes three definitions to depict and predigest the whole situation extraction in detail.and a fusion component to reduce the influence of alert redundancy on the total security situation.The less complex extraction makes the situation analysismore efficient,and the fine-grained model makes the analysis have a better expansibility.Finally,the situational variation curves are simulated,and the evaluation results prove the situation model applicable and efficient.     

A hierarchical algorithm for cyberspace situational awareness based on analytic hierarchy process

The existing network security management systems are unable either to provide users with useful security situation and risk assessment, or to aid administrators to make right and timely decisions based on the current state of network. These disadvantages always put the whole network security management at high risk. This paper establishes a simulation environment, captures the alerts as the experimental data and adopts statistical analysis to seek the vulnerabilities of the services provided by the hosts in the network. According to the factors of the network, the paper introduces the two concepts： Situational Meta and Situational Weight to depict the total security situation. A novel hierarchical algorithm based on analytic hierarchy process （AHP） is proposed to analyze the hierarchy of network and confirm the weighting coefficients. The algorithm can be utilized for modeling security situation, and determining its mathematical expression. Coupled with the statistical results, this paper simulates the security situational trends. Finally, the analysis of the simulation results proves the algorithm efficient and applicable, and provides us with an academic foundation for the implementation in the security situation     

嵌入式系统的发展

<正>2009年5月25～27日,由电气和电子工程师协会IEEE(Institute of Electrical and Electronics Engineers)主办,浙江大学计算机学院承办的第6届IEEE嵌入式系统与软件国际会议(6th IEEE International Conference on Embedded Software and Systems,ICESS09)在浙江省杭州市三台山庄举行。     

综合成本上涨对技术创新影响的效应研究

当前综合成本上涨已成为制约我国经济发展的重要瓶颈,为此我国政府提出加快实施创新驱动的发展战略,推动以科技创新为核心的全面创新。在综合成本上涨的背景下,详细分析了综合成本上涨倒逼技术创新的作用机理,并提出综合成本上涨影响企业行为的4种效应,为企业的技术创新选择提供了路径参考。最后,提出了相应的政策建议。     

高职数字电子技术课程教学改革探讨

国家非常注重高职教育的改革,大部分高职院校的数字电子技术课程都在进行改革尝试。如何加强校企合作、进行模块化教学,探索一条符合高职特色的课程建设之路是数字电子技术教师值得深思的课题,本文作者就高职数字电子技术课程教学改革做一点探讨。     

卵巢切除小鼠冠状动脉封堵诱导心肌梗塞模型的建立与评估

摘要:目的 建立模拟绝经后妇女发生心肌梗塞( MI) 的小鼠模型。 方法 将雌性小鼠卵巢切除( OVX) 后进行左冠状动脉前降支封堵诱导心肌梗塞发生;通过超声、血流动力学、形态学分析、免疫组织化学和 TUNEL 染色评估小鼠心脏功能和心肌梗塞面积的变化及心肌纤维化的程度。 结果 卵巢切除联合心肌梗塞可加重心脏功能受损,显著增加心肌纤维化和心肌梗塞面积,可诱导细胞凋亡和 TGF-β1 表达,血清中促炎细胞因子 TNF-α 和 IL-10 水平显著增加。 结论 成功建立模拟绝经后女性发生 MI 的小鼠模型,并对其功能和组织学特征进行评估。