摘要
应用贝叶斯-蒙特卡罗(Bayesian-MCMC)方法将海洋波导参数的先验信息描述为先验概率密度,结合雷达回波资料(电磁波传播损耗),得到待反演海洋波导参数的后验概率密度,用马尔可夫链蒙特卡罗(MCMC)-Gibbs采样器采样后验概率密度分布,并用样本最大似然估计值作为对海洋波导参数分布的估计.数值实验结果表明,该方法对先验信息进行了有效利用,反演精度高于遗传算法的反演精度.该方法较为充分利用先验信息,得到解的概率分布,即解的不确定性分析,这在实际应用中有一定的参考价值.
Using the Bayesian-Markov chain Monte Carlo （MCMC） method, based on the measurement information of radar clutter （electromagnetic propagation loss）, we obtain the posterior probability density of the duct parameter by describing the prior information of the duct parameter as the prior probability density. And then, Gibbs sampler of the MCMC method is used to sample the posterior probability density. The sample maximal likelihood is regarded as an evaluation of the duct parameter distribution. The results of simulation experiment show that this set of methods make good use of the prior information and the inversion precise is better than the genetic algorithm. In addition, it is capable of describing （definite or indefinite） prior information in a convenient and controllable way, as well as capable of giving the complete solutions, which is very important to practical applications
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第6期4335-4341,共7页
Acta Physica Sinica
基金
国家自然科学基金(批准号:40775025)资助的课题~~
关键词
波导
电磁波传播损耗
贝叶斯-蒙特卡罗
概率分布
duct, electromagnetic propagation loss, Bayesian-Markov chain Monte Carlo method, probability distribution
