【摘要】 当微弱的磁化强度信号被噪声污染时 ,甚至外加磁场信号也被噪声污染时 ,用快速傅里叶变换方法可以获得两种信号有限项的傅里叶级数表达式 ,然后由表达式直接计算出磁性参数 ,这是一种有效而又快捷的计算方法更多还原

【Abstract】 If the weak magnetization signal M and even the applied magnetic field signal H are coupled by noise, an expression of finite terms of Fourier series for signal M and H can be obtained by applying fast Fourier transform(FFM). The magnetic parameters can be calculated directly from the expression. This method proves to be fast and effective.更多还原