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沉积岩电导率公式研究的新进展
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作者 张金钟 《图书与石油科技信息》 1994年第1期4-9,57,共7页
介绍了1993年第34届世界测井年会上Herick和Kennedy提出的有关沉积岩电导率公式的新理论。这种理论是以岩石孔隙系统传导电流效率的物理模型为基础,着重从孔隙中盐水分布几何结构来研究导电规律。在这种理论模型指导下,所得到的电导率... 介绍了1993年第34届世界测井年会上Herick和Kennedy提出的有关沉积岩电导率公式的新理论。这种理论是以岩石孔隙系统传导电流效率的物理模型为基础,着重从孔隙中盐水分布几何结构来研究导电规律。在这种理论模型指导下,所得到的电导率实验公式与目前广泛应用的阿尔奇经验公式稍有区别,阿尔奇公式可作为一种特例,包含在这一新公式之中。还在这种理论模型指导下,重新分析了阿尔奇于1942年提出他的著名公式时曾经用过的数据,所得结果也与阿尔奇不同。新理论还可解释阿尔奇公式中两个参数是非整数的原因。 展开更多
关键词 沉积岩 导率 电效率理论
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Real-valued multi-area self set optimization in immunity-based network intrusion detection system 被引量:1
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作者 Zhang Fengbin Xi Liang Wang Shengwen 《High Technology Letters》 EI CAS 2012年第1期1-6,共6页
The real-valued self set in immunity-based network intrusion detection system (INIDS) has some defects: multi-area and overlapping, which are ignored before. The detectors generated by this kind of self set may hav... The real-valued self set in immunity-based network intrusion detection system (INIDS) has some defects: multi-area and overlapping, which are ignored before. The detectors generated by this kind of self set may have the problem of boundary holes between self and nonself regions, and the generation efficiency is low, so that, the self set needs to be optimized before generation stage. This paper proposes a self set optimization algorithm which uses the modified clustering algorithm and Gaussian distribution theory. The clustering deals with multi-area and the Gaussian distribution deals with the overlapping. The algorithm was tested by Iris data and real network data, and the results show that the optimized self set can solve the problem of boundary holes, increase the efficiency of detector generation effectively, and improve the system's detection rate. 展开更多
关键词 immunity-based network intrusion detection system (NIDS) real-valued self set OPTIMIZATION
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