【摘要】 本文引入时变分形Weistrass-Mandelbrot函数描述海面的局部动态特征,采用Kirchhoff解近似分析电磁散射场的时域分形特性,导出了海面电磁散射系数的分形模型。理论分析和试验结果表明,海面的散射回波信号保留了海面的一些分形特征,散射系数属于分形函数,其盒维数与海面的分形维数近似相等。更多还原

【Abstract】 The time-variant fractal Weistrass-Mandelbrot function is adopted to describe the regional dynamic feature of sea-surface. The time-domain property of a scattering field is analyzed by applying the Kirchhoff method, and the fractal model of the scattering coefficient from the sea-surface is reduced. Theoretical analysis and experimental results prove that the sea-scattered signal retains some fractal characteristic of the sea-surface. The results show the scattering coefficient is fractal function and its box-counting fractal dimension equal to the one of the sea profile.更多还原