CAJ | 학술논문

将短时傅里叶变换应用于超细颗粒两相介质中超声脉冲信号处理和时频谱联合分析,采用变声程方式,提出了一种对超细颗粒两相介质声衰减谱与声速谱同时测量的方法,并对平均粒径281 nm的ZnO-H_2O悬浊液超声衰减谱与声速谱进行实验研究.
장단시부리협변환응용우초세과립량상개질중초성맥충신호처리화시빈보연합분석,채용변성정방식,제출료일충대초세과립량상개질성쇠감보여성속보동시측량적방법,병대평균립경281 nm적ZnO-H_2O현탁액초성쇠감보여성속보진행실험연구.
Short-time fourier Transform (STFT) method is applied in the joint time-frequency analysis of ultrasonic signals in superfine particle suspensions. With ultrasonic path-variation measurement, a method of simultaneous ultrasonic attenuation spectrum and velocity spectrum measurement of superfine particle suspensions is put forward. The ultrasonic attenuation and velocity spectra of aqueous ZnO suspensions with mean particle size 281 nanometer have been drawn by a variable sound-path ultrasonic experimental facility.