code

说明：  page变换例程，可以对信号进行柯恩类时频分布中的page变换(page conversion routines, you can type on the signal time-frequency distribution of Cohen)

ofdm signal to noise ratio

基于牛顿拉夫逊法的电力系统潮流计算程序,适用于电气工程及其自动化和自动化学生毕业设计使用(Newton Raphson power flow calculation programApplies to electrical engineering and automation, and automation of graduate students designed to use)

说明：  四面体有限元程序,单元刚度的计算及总刚度矩征集成(tetrahedral finite element program modules stiffness of the total stiffness and assembly into Moment)

Matlab中进行二维离散傅立叶变换,并显示频谱图的方法。(two version discreate Forier Transemation baced on MATLAB)

读取轴承全寿命周期中的每组数据，并对其进行多域特征提取，包括时域和频域特征提取，用于轴承性能退化评估的研究很有用，自己亲手调试成功(Read bearing the full life cycle of each set of data, and extract its multi-domain characteristics, including time domain and frequency domain feature extraction for bearing performance degradation assessment studies are useful)

利用MAT—LAB对实验数据进行了基于表面轮廓法的三维图像重构，观察不同的平滑领域参数以及轮廓提取阈值对三维重构效果的影响。(In this paper，taking advantage of MATLAB we reconstruct experiment data into three dimension image in the way of feature-based method， and observe the effect of different parameters，such as the size of smooth convolution kernel and the threshold of ex— traction contour，on the quality of three dimension reconstruction)

necessary pdf for wimax

离散时间信号基本运算，包括序列相加相减、序列位移、序列翻转、序列周期延拓(Discrete-time signal basic operations, including the sequence of addition and subtraction, shift sequence, sequence inversion sequence cycle extension)

说明：  锁相环一直以来是人们关注的热点，通过锁相环可以进行电网电压的跟踪。(PLL has always been the focus of people's attention. PLL can track the grid voltage.)