近似系数 meaning in Chinese
a roximation coefficient
approximation coefficient
Examples
- Based on signal from carbon fiber composite defects such as lamination , hole , looseners in ultrasonic testing , this paper performs wavelet packet transform on the ultrasonic signals to extract statistics of approximation coefficients and detail coefficients that contain a great part of signal energy as sample - features
摘要本文以碳纤维复合材料常见缺陷分层、孔隙、疏松的超声波检测缺陷信号为研究对象，对超声波检测信号进行小波包变换，提取包含信号绝大部分能量的近似系数波形特征及细节系数的统计量作为样本的特征值。 - This kind of two - channels wavelets decomposition methed reconstruct the wavelet coefficients of an image from the radon transform data , and these coefficients were made reverted wavelet transform obtain the original image . wavelets subsampled on the quincunx lattice , which can have cut - off at an angle during the wavelets decomposition
基于不可分离mra的小波算法将投影数据进行二维滤波，其二通道的小波分解直接得到小波的近似系数和细节系数，这些系数再经过逆小波变换就得到了最终的重建图像。 - To obtain the fast matrix - vector multiplication algorithm , we approximate the kernel function with piece - wise polynomial and get the approximate coefficient matrix a using the approximate kernel function . let n be the number of quadrature points and k2 be the number of interpolating knots at each subdomain . it is proved that the construction of a and the matrix - vector multiplication ax require o ( nk ) operations respectively
我们利用对核函数进行分片多项式插值逼近得到适用于快速方法的近似系数矩阵a ：矩阵a的计算和矩阵-向量相乘ax各需要o ( nk )次运算，存贮a需要占用o ( nk )内存，其中n为积分节点的个数， k ~ 2为每个小区域的插值节点数。