基于传感器的人体行为识别方法在健康监测、运动分析和人机交互等方面得到了广泛应用。特征选择是准确识别人体行为的关键环节,其目的是在提高分类性能的基础上从高维特征空间中筛选出与分类相关的特征,以降低特征维数和计算复杂度。然...基于传感器的人体行为识别方法在健康监测、运动分析和人机交互等方面得到了广泛应用。特征选择是准确识别人体行为的关键环节,其目的是在提高分类性能的基础上从高维特征空间中筛选出与分类相关的特征,以降低特征维数和计算复杂度。然而,传统的特征选择方法面临着未考虑所选特征冗余性的挑战。因此,针对基于特征子集区分度(Discernibility of Feature Subsets,DFS)衡量准则的特征选择方法仅考虑多个特征的相关性而忽视特征之间冗余性对分类结果影响等缺陷,提出一种基于冗余性的特征子集区分度衡量准则的特征选择方法(Redundancy and Discernibility of Feature Subsets,R-DFS),在特征选择的过程引入冗余性分析,删除冗余特征,以提高分类准确率和降低计算复杂度。实验结果表明,改进方法可有效降低特征维数并提高分类准确度。展开更多
A joint resource allocation scheme concerned with the sensor subset,power and bandwidth for range-only target tracking in multiple-input multiple-output(MIMO)radar systems is proposed.By selecting an optimal subset of...A joint resource allocation scheme concerned with the sensor subset,power and bandwidth for range-only target tracking in multiple-input multiple-output(MIMO)radar systems is proposed.By selecting an optimal subset of sensors with the predetermined size and implementing the power allocation and bandwidth strategies among them,this algorithm can help achieving a better performance within the same resource constraints.Firstly,the Bayesian Cramer-Rao bound(BCRB)is derived from it.Secondly,a criterion for minimizing the BCRB at the target location among all targets tracking in a certain range is derived.Thirdly,the optimization problem involved with three variable vectors is formulated,which can be simplified by deriving the relationship between the optimal power allocation vector and the bandwidth allocation vector.Then,the simplified optimization problem is solved by the cyclic minimization algorithm incorporated with the sequential parametric convex approximation(SPCA)algorithm.Finally,the validity of the proposed method is demonstrated with simulation results.展开更多
文摘基于传感器的人体行为识别方法在健康监测、运动分析和人机交互等方面得到了广泛应用。特征选择是准确识别人体行为的关键环节,其目的是在提高分类性能的基础上从高维特征空间中筛选出与分类相关的特征,以降低特征维数和计算复杂度。然而,传统的特征选择方法面临着未考虑所选特征冗余性的挑战。因此,针对基于特征子集区分度(Discernibility of Feature Subsets,DFS)衡量准则的特征选择方法仅考虑多个特征的相关性而忽视特征之间冗余性对分类结果影响等缺陷,提出一种基于冗余性的特征子集区分度衡量准则的特征选择方法(Redundancy and Discernibility of Feature Subsets,R-DFS),在特征选择的过程引入冗余性分析,删除冗余特征,以提高分类准确率和降低计算复杂度。实验结果表明,改进方法可有效降低特征维数并提高分类准确度。
基金supported by the National Natural Science Foundation of China(615015136140146941301481)
文摘A joint resource allocation scheme concerned with the sensor subset,power and bandwidth for range-only target tracking in multiple-input multiple-output(MIMO)radar systems is proposed.By selecting an optimal subset of sensors with the predetermined size and implementing the power allocation and bandwidth strategies among them,this algorithm can help achieving a better performance within the same resource constraints.Firstly,the Bayesian Cramer-Rao bound(BCRB)is derived from it.Secondly,a criterion for minimizing the BCRB at the target location among all targets tracking in a certain range is derived.Thirdly,the optimization problem involved with three variable vectors is formulated,which can be simplified by deriving the relationship between the optimal power allocation vector and the bandwidth allocation vector.Then,the simplified optimization problem is solved by the cyclic minimization algorithm incorporated with the sequential parametric convex approximation(SPCA)algorithm.Finally,the validity of the proposed method is demonstrated with simulation results.
