quadrature n. 1.【数学】求积分,求面积。 2.【天文学】矩;(月的)上[下]弦;方照。 3.【物理学】正交;转象差;九十度相位差。 the quadrature (of the circle) 圆积法[作与圆等积的正方形]。 phase quadrature 【物理学】转象相差,九十度相位差。
The paper also studies fast arithmetic and programming of discrete time quadrature wt and wpt and takes a deep look into their additional applications in motor testing , including denoising , filtering and so on . starting from basic theory of time - frequency analysis and wavelet analysis of asymptotic signals , this paper investigates several if law extraction methods and presents an especially effective one using wavelet ridge 论文从时频分析的基本理论出发,在渐进信号小波分析的基础上,研究了渐进信号小波变换的渐进估计方法,提出了利用小波脊线来提取信号频率随时间连续变化规律(即瞬时频率)的方法。