中文说明：
matlab编写的信号趋势检测，利用信号多项式拟合和时频分析方法用于动态检测信号的异常趋势，给出检测时间，可以关联试验数据进行测试，本程序给出了仿真数据的测试。
English Description：
MATLAB signal trend detection, using signal polynomial fitting and time-frequency analysis method for dynamic detection of abnormal signal trend, given the detection time, can be associated with test data for testing, this program gives the simulation data test