There are two types of inverse problems: Optimization designation and parameter identification. Before the parameter identification of mathematical and physical inverse problems, it is necessary to determine the number and position of measurement points in analysis and evaluation of a large number of measured data. In this paper, a mathematical methodology is proposed to describe the influence of the number and position of measurement points on the reconstruction precision. Information entropy and Bayesian theory are used in the description. Finally, a numerical experiment shows that the methodology is effective.
The dielectric property of organic reagent is key to the study of Microwave-assisatant organic synthesization.The data of complex permittivity of these organic reagents can not be obtained easy.The complex permittvity of these organic regents were measured in 2.45 GHz by cavity perturbation method.The result shows that the real and imaginary parts of the permittivity of alcohol are larger than others.The real part of the complex permittivity of ketone is larger and the imaginary part is smaller.The real and imaginary parts of the permittivity of acid are smaller.The real and imaginary parts of the permittivity of alkyl and benzene are the smallest.The real part and the imaginary parts of the permittivity of all decrease while the increasing of the number of carbon’s chain.The analysis and the measurement offer high helps in the microwave assistant organic synthesization.
采用遗传算法(Genetic Algorithm,GA)进行天线结构优化,利用矩量法(Method of Moments,MoM)完成天线数值仿真计算,结合并行计算技术提高计算效率,构建了“天基”天线自动设计并行软件系统。该软件系统通过对多类复杂结构天线进行计算机辅助自动设计,显示出比传统天线设计方法更大的灵活性和更强的设计能力。将“天基”天线自动设计并行软件系统移植到银河巨型机上,测试结果表明,该系统具备高效使用128个CPU进行并行天线自动设计的能力。
