{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,6]],"date-time":"2025-11-06T15:59:42Z","timestamp":1762444782254,"version":"3.37.3"},"reference-count":39,"publisher":"World Scientific Pub Co Pte Ltd","issue":"11","funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Patt. Recogn. Artif. Intell."],"published-print":{"date-parts":[[2018,11]]},"abstract":"<jats:p> In this paper, time\u2013frequency (TF) characteristics of pressure pulsation in the self-resonating jet nozzle were thoroughly checked and analyzed by two TF analysis methods. The frequency spectrum including frequency-domain structure and approximate frequency-scope was obtained via the classical fast Fourier transform (FFT) method. Due to the typical nonstationary and time-varying nature, the FFT method is inefficient in analyzing such signals. TF analysis method was introduced to obtain the accurate instantaneous frequency (IF) of the self-resonating jet signal, which makes the quantitative analysis of the resonance frequency possible. In addition, a comparative study on the IF results were carried out by coupling the Morlet wavelet transforms, synchrosqueezed wavelet transforms (SWTs) and the modulus maximum methods together, and the coherence of frequency-domain structure was demonstrated. The result showed that SWT is good at acquiring the frequency distribution of the self-resonating jet with high readability and accuracy, and the TF analysis method is suitable for researching jet nozzle\u2019s TF characteristics with high efficiency. <\/jats:p>","DOI":"10.1142\/s0218001418580065","type":"journal-article","created":{"date-parts":[[2018,5,7]],"date-time":"2018-05-07T04:19:50Z","timestamp":1525666790000},"page":"1858006","source":"Crossref","is-referenced-by-count":8,"title":["Time\u2013Frequency Analysis of Pressure Pulsation Signal in the Chamber of Self-Resonating Jet Nozzle"],"prefix":"10.1142","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2817-2819","authenticated-orcid":false,"given":"Lihua","family":"Cui","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. 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