共查询到20条相似文献,搜索用时 31 毫秒
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将人工鱼群算法(AFSA)用于IIR数字滤波器设计,建立了相应的优化模型,给出了简化的人工鱼群算法及其实现步骤。最后,将该算法用于低通、带通IIR数字滤波器的设计,并与粒子群算法进行了比较。仿真结果证明了AFSA的有效性,并且具有算法灵活、简单,全局收敛性好。收敛速度快的优点。 相似文献
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针对粒子群优化算法(PSO)在加速度计标定中存在早熟及陷入局部最优的不足,提出了基于差分进化(DE)的双种群信息共享及并行进化的混合PSO算法,并将该算法应用于加速度计快速标定。为提高混合算法的优化性能,提出了一种平衡DE算法全局探索和局部开发能力的加权变异算子,将Logistic函数的非线性特性引入到PSO算法惯性权重和DE算法加权系数的动态调整中。基准测试函数仿真表明所提出的混合算法在收敛速度、收敛精度、全局搜索性能和鲁棒性等方面明显优于PSO、DE算法;加速度计标定仿真结果表明,提出的混合算法能有效提高加速度计的标定精度。 相似文献
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《电子学报:英文版》2016,(6):1079-1088
Particle swarm optimization (PSO) has shown a good performance on solving global optimization problems.Traditional PSO has two main drawbacks of premature convergence and low convergence speed,especially on complex problems.This paper presents a new approach called Adaptive multi-layer particle swarm optimization with neighborhood search (AMPSONS),where the traditional PSO is improved by employing an adaptive multi-layer search and neighborhood search strategy to achieve a trade-off between exploitation and exploration abilities.In order to evaluate the performance of the proposed AMPSONS algorithm,the performance of AMPSONS is compared with five other PSO family algorithms,namely,CLPSO,DNLPSO,DNSPSO,global MLPSO and local MLPSO on a set of benchmark functions.The comparison results show that AMPSONS has a promising performance on majority of the test functions. 相似文献
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自适应阵列天线常需要采用宽零陷技术,以增强阵列天线抗干扰的稳健性。为此,提出了一种基于混沌粒子群算法(CPSO)的阵列天线宽零陷方向图综合方法。该算法首先采用混沌序列初始化粒子位置,以增强搜索多样性,并在对部分非优胜粒子的位置更新时引入混沌扰动项,在每次迭代中对全局最优位置进行变尺度混沌优化,提高了全局和局部搜索能力,加快了收敛速度。仿真结果验证了混沌粒子群算法在阵列天线宽零陷方向图综合时的收敛速度和精度方面均优于标准粒子群算法。 相似文献
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为了提高粒子群算法(PSO)的收敛性及多样性,提出一种基于区域分割的自适应变异粒子群算法(RSVPSO).算法采用区域分割的思想,利用粒子间信息交叉,使粒子搜索区间快速缩小;同时在迭代后期与自适应变异策略相结合,提高粒子跳出局部最优陷阱的能力和增强粒子多样性,达到寻优的目的.将所提出的算法应用于8个测试函数,并与精英免疫克隆选择的协同进化粒子群等算法进行比较,结果表明,新算法在收敛速度、搜索精度及寻优效率等方面有较大提高. 相似文献
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应用于负荷经济分配的改进差分进化算法 总被引:1,自引:1,他引:0
为了求解电力系统负荷经济分配问题,提出一种改进差分进化算法.该算法考虑机组的爬坡约束、出力限制区约束等非光滑费用函数曲线等非线性特性,采用词典排序法处理系统约束来保证算法结果严格满足约束条件,保证了系统的稳定性和安全性.在差分进化算法的交叉算子计算中引入微粒群算法中的个体最优和全局最优的概念,并采用遗传微粒群算法的多点交叉机制,将两者以一定的比率引入试验向量增强算法的局部搜索能力.此算法被应用于一个6台机组的算例,与遗传算法、微粒群算法和标准差分进化算法相比较,改进的差分进化算法的结果质量更好并且更稳定,是求解负荷经济分配问题的一种有效方法. 相似文献
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《电子学报:英文版》2016,(6):1179-1185
An improved algorithm based on Multiagent particle swarm (MAS) is proposed to solve the distribution network reconflguration problem in this paper.The approach is a combination of the learning,competition and cooperation mechanism of multi-agent technology and the strategies of Particle swarm optimization (PSO) algorithm.Using the Von Neumann topology structure in PSO algorithm,each particle represents an agent;each agent not only competes and cooperates with its neighborhood,but also absorbs the evolutionary mechanism of PSO algorithm,so as to share the information with the agent of global optimal.The rules of particle renovating reduce unfeasible solution in the process of particle renovating,and it is able to converge to global optimal accurately and quickly.Test on the IEEE 16-node,32-node and 69-node system shows both a rapid convergence and a good robustness of this proposed approach. 相似文献
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IIR数字滤波器设计的粒子群优化算法 总被引:11,自引:0,他引:11
本文探讨了粒子群优化算法及其性能评估准则,然后重点研究了IIR数字滤波器设计的粒子群优化算法及其实现步骤。最后,通过IIR数字低通、带通滤波器设计两个实例证明了本文算法的有效性。 相似文献
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在多输入多输出系统中,发射端和接收端的多天线配置提高了信道容量和传输可靠性,而天线选择技术能在保持系统优点的同时有效地降低运算复杂度以及硬件成本。为了能在时变的信道条件下快速地选择出一组最优的天线子集,提出了一种基于二进制粒子群算法的改进的天线选择算法。推导出了二进制粒子群联合收发端天线选择的信道容量公式,并将其作为粒子群算法的适应度函数,使天线选择问题转换成二进制编码串的组合优化问题。通过改进模糊函数提高粒子群算法的收敛性,让二进制粒子群尽可能地收敛于全局最优位置。仿真结果表明,改进的算法能在降低运算复杂度的同时提高收敛性,且系统信道容量趋近于最优算法。 相似文献
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针对传统无线传感器网络(wireless sensor network,WSN)中节点定位精度不高的问题,提出了一种混合粒子群(particle swarm optimization,PSO)和差分进化优化(differential evolution,DE)算法。首先在PSO中引入惯性权重的自适应更新策略,以兼顾开发和勘探能力,在种群经过PSO进化后,然后根据提前设定的阈值,将其分为适应度值较大的Su种群和适应度值较小的In种群,In中的粒子使用DE算法继续优化。HPSO-DE算法结合PSO算法和DE算法的优点,达到较好的性能。然后用标准测试函数来检测该算法的性能,验证结果表明所提出的HPSO-DE在寻优速度和收敛精度较PSO和DE而言都有了较大提高。接下来将HPSO-DE方法应用到WSN网络节点定位场景上,从实验测试结果可以看出,其精度相比PSO平均提高了0.5 m左右,在定位上具有更大的优势。 相似文献
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针对传统认知决策引擎仅优化物理层参数,提出一种融合粒子群和差分进化的跨层认知决策引擎(IPSO-DE)。首先对PSO引入自适应惯性权重机制,使得每个个体随各自的适应度自适应进化,提高其探索能力。然后改进DE的交叉概率,从而提高DE算法的开发能力。最后在认知引擎模型中,将经过PSO进化的种群分为优等种群和劣等种群,劣等种群利用改进DE进行优化变异,增加粒子群个体的差异性。仿真表明IPSO-DE增强了种群开发和探索能力,多载波系统的跨层参数优化决策实验证明了其有效性。 相似文献
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The shape reconstruction of a perfectly conducting 2-D scatterer by inverting transverse magnetic scattered field measurements is investigated. The reconstruction is based on evolutionary algorithms that minimize the discrepancy between measured and estimated scattered field data. A closed cubic B-spline expansion is adopted to represent the scatterer contour. Two algorithms have been examined the differential-evolution (DE) algorithm and the particle swarm optimization (PSO). Numerical results indicate that the DE algorithm outperforms the PSO in terms of reconstruction accuracy and convergence speed. Both techniques have been tested in the case of simulated measurements contaminated by additive white Gaussian noise. 相似文献
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Chao Lv Shi Yan Gang Cheng Li Xu Xiaoyong Tian 《Multidimensional Systems and Signal Processing》2017,28(4):1267-1281
This paper proposes a hybrid optimization algorithm named as BBO–PSO, which is a combination of biogeography-based optimization (BBO) and particle swarm optimization (PSO). In BBO–PSO, the whole population will be split into several subgroups and BBO is employed for local search in each subgroup independently to achieve the different local optima while PSO is employed for global search based on the local optima to achieve the global optimum. The test results on the benchmark functions show that BBO–PSO has powerful search ability with great robustness. Furthermore, the proposed algorithm is applied to the design of the 2-D IIR digital filters and the simulation results show that it outperforms the existing methods on this problem. 相似文献
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Design and performance of adaptive systems based on structured stochastic optimization strategies 总被引:2,自引:0,他引:2
The theory and design of linear adaptive filters based on FIR filter structures is well developed and widely applied in practice. However, the same is not true for more general classes of adaptive systems such as linear infinite impulse response adaptive filters (MR) and nonlinear adaptive systems. This situation results because both linear IIR structures and nonlinear structures tend to produce multi-modal error surfaces for which stochastic gradient optimization strategies may fail to reach the global minimum. After briefly discussing the state of the art in linear adaptive filtering, the attention of this paper is turned to MR and nonlinear adaptive systems for potential use in echo cancellation, channel equalization, acoustic channel modeling, nonlinear prediction, and nonlinear system identification. Structured stochastic optimization algorithms that are effective on multimodal error surfaces are then introduced, with particular attention to the particle swarm optimization (PSO) technique. The PSO algorithm is demonstrated on some representative IIR and nonlinear filter structures, and both performance and computational complexity are analyzed for these types of nonlinear systems. 相似文献