Creates a sinewave in matlab. Can be used to creates waves to test filters

模拟计算声波在声子晶体波导中的传播特性，可以得到在法向上声压的强度变化图.-Simulated sound waves in the transmission characteristics of phononic crystal waveguide, can get up in the intensity of the sound pressure variation

徐小明股票四浪用MACD确定有参数调整计算-Hsu Hsiao-ming stock four waves with MACD determine the parameter adjustment calculation