The most important problem in targets tracking is data association which may be represented as a sort of constraint combinational optimization problem. Chaos optimization and adaptive genetic algorithm were used to de...The most important problem in targets tracking is data association which may be represented as a sort of constraint combinational optimization problem. Chaos optimization and adaptive genetic algorithm were used to deal with the problem of multi-targets data association separately. Based on the analysis of the limitation of chaos optimization and genetic algorithm, a new chaos genetic optimization combination algorithm was presented. This new algorithm first applied the "rough" search of chaos optimization to initialize the population of GA, then optimized the population by real-coded adaptive GA. In this way, GA can not only jump out of the "trap" of local optimal results easily but also increase the rate of convergence. And the new method can also avoid the complexity and time-consumed limitation of conventional way. The simulation results show that the combination algorithm can obtain higher correct association percent and the effect of association is obviously superior to chaos optimization or genetic algorithm separately. This method has better convergence property as well as time property than the conventional ones.展开更多
针对鲸鱼优化算法(whale optimization algorithm,WOA)易陷入局部最优,收敛速度慢和寻优精度低等问题,提出一种融合混沌映射和二次插值的自适应鲸鱼优化算法(adaptive whale optimization algorithm based on chaotic mapping and quadr...针对鲸鱼优化算法(whale optimization algorithm,WOA)易陷入局部最优,收敛速度慢和寻优精度低等问题,提出一种融合混沌映射和二次插值的自适应鲸鱼优化算法(adaptive whale optimization algorithm based on chaotic mapping and quadratic interpolation,CQAWOA)。引入混沌映射在初始化阶段生成新种群,实现种群多样性;设计自适应权重,提高算法全局搜索和局部寻优能力并加快收敛速度;利用二次插值策略生成新的鲸鱼个体,采用贪婪策略更新局部最优解,提高种群计算的精度。通过15个基准函数将改进算法与其它优化算法进行对比测试,测试结果验证了在求解过程中,改进算法寻优速度和求解精度均存在显著提升。展开更多
利用传统二维多重信号分类(multiple signal classification,MUSIC)算法进行二维波达方向(direction of arrival,DOA)估计时,往往带来巨大的运算量,限制了算法的实际应用。提出了一种能够大大降低二维DOA估计运算量的模值约束降维MUSIC...利用传统二维多重信号分类(multiple signal classification,MUSIC)算法进行二维波达方向(direction of arrival,DOA)估计时,往往带来巨大的运算量,限制了算法的实际应用。提出了一种能够大大降低二维DOA估计运算量的模值约束降维MUSIC算法,该算法将二维DOA估计问题转化为优化方程的求解问题,并采用模值约束法定义附加条件,使方向向量得到了较强约束,进而使求解结果更加接近最优解。理论分析和仿真实验表明,本文算法所需运算量较低,且角度估计的成功率与精确度较高。展开更多
文摘The most important problem in targets tracking is data association which may be represented as a sort of constraint combinational optimization problem. Chaos optimization and adaptive genetic algorithm were used to deal with the problem of multi-targets data association separately. Based on the analysis of the limitation of chaos optimization and genetic algorithm, a new chaos genetic optimization combination algorithm was presented. This new algorithm first applied the "rough" search of chaos optimization to initialize the population of GA, then optimized the population by real-coded adaptive GA. In this way, GA can not only jump out of the "trap" of local optimal results easily but also increase the rate of convergence. And the new method can also avoid the complexity and time-consumed limitation of conventional way. The simulation results show that the combination algorithm can obtain higher correct association percent and the effect of association is obviously superior to chaos optimization or genetic algorithm separately. This method has better convergence property as well as time property than the conventional ones.
文摘针对鲸鱼优化算法(whale optimization algorithm,WOA)易陷入局部最优,收敛速度慢和寻优精度低等问题,提出一种融合混沌映射和二次插值的自适应鲸鱼优化算法(adaptive whale optimization algorithm based on chaotic mapping and quadratic interpolation,CQAWOA)。引入混沌映射在初始化阶段生成新种群,实现种群多样性;设计自适应权重,提高算法全局搜索和局部寻优能力并加快收敛速度;利用二次插值策略生成新的鲸鱼个体,采用贪婪策略更新局部最优解,提高种群计算的精度。通过15个基准函数将改进算法与其它优化算法进行对比测试,测试结果验证了在求解过程中,改进算法寻优速度和求解精度均存在显著提升。
文摘利用传统二维多重信号分类(multiple signal classification,MUSIC)算法进行二维波达方向(direction of arrival,DOA)估计时,往往带来巨大的运算量,限制了算法的实际应用。提出了一种能够大大降低二维DOA估计运算量的模值约束降维MUSIC算法,该算法将二维DOA估计问题转化为优化方程的求解问题,并采用模值约束法定义附加条件,使方向向量得到了较强约束,进而使求解结果更加接近最优解。理论分析和仿真实验表明,本文算法所需运算量较低,且角度估计的成功率与精确度较高。