多重信号分类(Multiple Signal Classification,MUSIC)算法是波达方向(Direction of Arrival,DOA)估计领域中的经典算法之一,但其谱峰搜索过程的巨大计算量降低了算法的实时性。经典进化算法虽能降低搜索时间,却仅能搜索到一个解,当存...多重信号分类(Multiple Signal Classification,MUSIC)算法是波达方向(Direction of Arrival,DOA)估计领域中的经典算法之一,但其谱峰搜索过程的巨大计算量降低了算法的实时性。经典进化算法虽能降低搜索时间,却仅能搜索到一个解,当存在多个入射信号时便无法搜索全部解。为了解决该问题,在粒子群算法的基础上,借鉴小生境思想提出了小生境粒子群算法,利用顺序聚类算法将粒子划分到不同的小生境,并根据小生境的迭代数选择不同搜索策略,兼顾了搜索广度和深度。仿真结果表明,改进粒子群算法在进行多谱峰搜索时能大幅降低搜索时间并搜索到全部解,与同类算法相比具有更高的精度和较少设置参数,其精度可以达到10^(-3),用时可以达到网格搜索的1/7000,在基于MUSIC算法的多个信号DOA估计中有重要的应用价值。展开更多
The depletion of fossil energy and the deterioration of the ecological environment have severely restricted the development of the power industry.Therefore,it is extremely urgent to transform energy production methods...The depletion of fossil energy and the deterioration of the ecological environment have severely restricted the development of the power industry.Therefore,it is extremely urgent to transform energy production methods and vigorously develop renewable energy sources.It is therefore important to ensure the stability and operation of a large multi-energy complementary system,and provide theoretical support for the world’s largest single complementary demonstration project with hydro-wind-PV power-battery storage in Qinghai Province.Considering all the multiple power supply constraints,an optimization scheduling model is established with the objective of minimizing the volatility of output power.As particle swarm optimization(PSO)has a problem of premature convergence and slow convergence in the latter half,combined with niche technology in evolution,a niche particle swarm optimization(NPSO)is proposed to determine the optimal solution of the model.Finally,the multiple stations’coordinated operation is analyzed taking the example of 10 million kilowatt complementary power stations with hydropower,wind power,PV power,and battery storage in the Yellow River Company Hainan prefecture.The case verifies the rationality and feasibility of the model.It shows that complementary operations can improve the utilization rate of renewable energy and reduce the impact of wind and PV power’s volatility on the power grid.展开更多
In this work,evolutionary algorithms are applied for the first time to achieve better radiation characteristics over the conventional beamforming algorithm in the concentric hexagonal antenna array(CHAA),which improve...In this work,evolutionary algorithms are applied for the first time to achieve better radiation characteristics over the conventional beamforming algorithm in the concentric hexagonal antenna array(CHAA),which improves the performance of wireless communication.Multiple signal classification(MUSIC)algorithm is employed for direction of arrival(DoA)estimation.The conventional adaptive beam steering algorithm,least mean-square(LMS)algorithm,is used to steer the beam.Further,the proposed approach is employed by novel particle swarm optimization(NPSO)to reduce sidelobe level(SLL)even further.A six-ring CHAA with 126 elements for DoA estimation and beam steering is simulated.The simulation results of the MUSIC,LMS,NPSO,and particle swarm optimization(PSO)algorithms are provided for various DoAs.展开更多
文摘多重信号分类(Multiple Signal Classification,MUSIC)算法是波达方向(Direction of Arrival,DOA)估计领域中的经典算法之一,但其谱峰搜索过程的巨大计算量降低了算法的实时性。经典进化算法虽能降低搜索时间,却仅能搜索到一个解,当存在多个入射信号时便无法搜索全部解。为了解决该问题,在粒子群算法的基础上,借鉴小生境思想提出了小生境粒子群算法,利用顺序聚类算法将粒子划分到不同的小生境,并根据小生境的迭代数选择不同搜索策略,兼顾了搜索广度和深度。仿真结果表明,改进粒子群算法在进行多谱峰搜索时能大幅降低搜索时间并搜索到全部解,与同类算法相比具有更高的精度和较少设置参数,其精度可以达到10^(-3),用时可以达到网格搜索的1/7000,在基于MUSIC算法的多个信号DOA估计中有重要的应用价值。
文摘The depletion of fossil energy and the deterioration of the ecological environment have severely restricted the development of the power industry.Therefore,it is extremely urgent to transform energy production methods and vigorously develop renewable energy sources.It is therefore important to ensure the stability and operation of a large multi-energy complementary system,and provide theoretical support for the world’s largest single complementary demonstration project with hydro-wind-PV power-battery storage in Qinghai Province.Considering all the multiple power supply constraints,an optimization scheduling model is established with the objective of minimizing the volatility of output power.As particle swarm optimization(PSO)has a problem of premature convergence and slow convergence in the latter half,combined with niche technology in evolution,a niche particle swarm optimization(NPSO)is proposed to determine the optimal solution of the model.Finally,the multiple stations’coordinated operation is analyzed taking the example of 10 million kilowatt complementary power stations with hydropower,wind power,PV power,and battery storage in the Yellow River Company Hainan prefecture.The case verifies the rationality and feasibility of the model.It shows that complementary operations can improve the utilization rate of renewable energy and reduce the impact of wind and PV power’s volatility on the power grid.
文摘In this work,evolutionary algorithms are applied for the first time to achieve better radiation characteristics over the conventional beamforming algorithm in the concentric hexagonal antenna array(CHAA),which improves the performance of wireless communication.Multiple signal classification(MUSIC)algorithm is employed for direction of arrival(DoA)estimation.The conventional adaptive beam steering algorithm,least mean-square(LMS)algorithm,is used to steer the beam.Further,the proposed approach is employed by novel particle swarm optimization(NPSO)to reduce sidelobe level(SLL)even further.A six-ring CHAA with 126 elements for DoA estimation and beam steering is simulated.The simulation results of the MUSIC,LMS,NPSO,and particle swarm optimization(PSO)algorithms are provided for various DoAs.
