This letter investigates an efficient design procedure integrating the Genetic Algorithm (GA) with the Finite Difference Time Domain (FDTD) for the fast optimal design of Smart Antenna Arrays (SAA). The FDTD is used t...This letter investigates an efficient design procedure integrating the Genetic Algorithm (GA) with the Finite Difference Time Domain (FDTD) for the fast optimal design of Smart Antenna Arrays (SAA). The FDTD is used to analyze SAA with mutual coupling. Then,on the basis of the Maximal Signal to Noise Ratio (MSNR) criteria, the GA is applied to the optimization of weighting elements and structure of SAA. Finally, the effectiveness of the analysis is evaluated by experimental antenna arrays.展开更多
The multiple solutions for one-dimensional cubic nonlinear problem u'+u^3=0,u(0)=u(π)=0are computed,on the basis of the eigenpairs of-φ'_k=λ_(kφk),k=1,2,3....There exist two nonzero solutions±u_k corr...The multiple solutions for one-dimensional cubic nonlinear problem u'+u^3=0,u(0)=u(π)=0are computed,on the basis of the eigenpairs of-φ'_k=λ_(kφk),k=1,2,3....There exist two nonzero solutions±u_k corresponding to each k,and their Morse index MI(k) for 1(?)k(?)20 is to be exactly determined.It isshown by the numerical results that MI(k)(?)k.展开更多
This paper proposes a new graph model for multibus multiprocessor system.Based on the link representation of cut set of the hypergraph,ring sum and its algebraic properties,we can directly calculate the degrees of bus...This paper proposes a new graph model for multibus multiprocessor system.Based on the link representation of cut set of the hypergraph,ring sum and its algebraic properties,we can directly calculate the degrees of bus-fault-tolerance and processor-fault-tolerance for any multibus multiprocessor system.Algorithms are listed and all the theorems and proofs are stated.展开更多
文摘This letter investigates an efficient design procedure integrating the Genetic Algorithm (GA) with the Finite Difference Time Domain (FDTD) for the fast optimal design of Smart Antenna Arrays (SAA). The FDTD is used to analyze SAA with mutual coupling. Then,on the basis of the Maximal Signal to Noise Ratio (MSNR) criteria, the GA is applied to the optimization of weighting elements and structure of SAA. Finally, the effectiveness of the analysis is evaluated by experimental antenna arrays.
基金Supported by The Special Funds of State Major Basic Research Projects (No.G1999032804)National Natural Science Foundation of China (No.19331021)Mathematical Tianyuan Youth Foundation of National Natural Science Foundation of China (No.10226016)
文摘The multiple solutions for one-dimensional cubic nonlinear problem u'+u^3=0,u(0)=u(π)=0are computed,on the basis of the eigenpairs of-φ'_k=λ_(kφk),k=1,2,3....There exist two nonzero solutions±u_k corresponding to each k,and their Morse index MI(k) for 1(?)k(?)20 is to be exactly determined.It isshown by the numerical results that MI(k)(?)k.
文摘This paper proposes a new graph model for multibus multiprocessor system.Based on the link representation of cut set of the hypergraph,ring sum and its algebraic properties,we can directly calculate the degrees of bus-fault-tolerance and processor-fault-tolerance for any multibus multiprocessor system.Algorithms are listed and all the theorems and proofs are stated.
