This paper presents an improved gravitational search algorithm （IGSA） as a hybridization of a relatively recent evolutionary algorithm called gravitational search algorithm （GSA）, with the free search differential...This paper presents an improved gravitational search algorithm （IGSA） as a hybridization of a relatively recent evolutionary algorithm called gravitational search algorithm （GSA）, with the free search differential evolution （FSDE）. This combination incorporates FSDE into the optimization process of GSA with an attempt to avoid the premature convergence in GSA. This strategy makes full use of the exploration ability of GSA and the exploitation ability of FSDE. IGSA is tested on a suite of benchmark functions. The experimental results demonstrate the good performance of IGSA.展开更多
针对支持向量机(SVM)应用于网络入侵检测时特征选择及分类器参数优化问题,利用改进的二进制量子引力搜索算法(IBQGSA)对入侵特征集及SVM参数进行组合寻优。将入侵特征集及SVM参数看作是二进制量子引力搜索算法中的量子个体并进行组合编...针对支持向量机(SVM)应用于网络入侵检测时特征选择及分类器参数优化问题,利用改进的二进制量子引力搜索算法(IBQGSA)对入侵特征集及SVM参数进行组合寻优。将入侵特征集及SVM参数看作是二进制量子引力搜索算法中的量子个体并进行组合编码,在使用量子旋转门更新个体位移时,引入动态的位移更新策略,确保算法收敛到全局极值,设计与进化程度及个体适应度值相关的自适应变异概率,提升量子非门变异操作时算法的自适应变异能力。利用KDD CUP 99数据集进行仿真实验,实验结果表明,所提算法能有效地获取最佳特征子集及分类器参数组合,检测效果更好。展开更多
基金supported by the National Natural Science Foundation of China (70871081)the Shanghai Leading Academic Discipline Project of China (S1205YLXK)
文摘This paper presents an improved gravitational search algorithm （IGSA） as a hybridization of a relatively recent evolutionary algorithm called gravitational search algorithm （GSA）, with the free search differential evolution （FSDE）. This combination incorporates FSDE into the optimization process of GSA with an attempt to avoid the premature convergence in GSA. This strategy makes full use of the exploration ability of GSA and the exploitation ability of FSDE. IGSA is tested on a suite of benchmark functions. The experimental results demonstrate the good performance of IGSA.
文摘针对支持向量机(SVM)应用于网络入侵检测时特征选择及分类器参数优化问题,利用改进的二进制量子引力搜索算法(IBQGSA)对入侵特征集及SVM参数进行组合寻优。将入侵特征集及SVM参数看作是二进制量子引力搜索算法中的量子个体并进行组合编码,在使用量子旋转门更新个体位移时,引入动态的位移更新策略,确保算法收敛到全局极值,设计与进化程度及个体适应度值相关的自适应变异概率,提升量子非门变异操作时算法的自适应变异能力。利用KDD CUP 99数据集进行仿真实验,实验结果表明,所提算法能有效地获取最佳特征子集及分类器参数组合,检测效果更好。
