نتایج جستجو برای: ultrasonic additive manufacturing
تعداد نتایج: 171459 فیلتر نتایج به سال:
Abstrac t This paper presents a procedure for wind speed measurement using ultrasonic transducers based on short-time Fourier transform (STFT). The measurement of wind speed was performed by estimating the ultrasonic transit-time (ToF). For this purpose the estimated ToF was used the technique of digital signal processing, based on the STFT. The ultrasonic signal detection was performed by sett...
In ultrasonic nondestructive evaluation (NDE) of materials, pulse echo measurements are masked by the characteristics of the measuring instruments, the propagation paths taken by the ultrasonic pulses, and are corrupted by additive noise. Deconvolution operation seeks to undo these masking effects and extract the defect impulse response which is essential for identification. In this contributio...
In conjunction with America Makes, the nation’s leading and collaborative partner in additive manufacturing (AM) and 3D printing technology and the Manufacturing Extension Partnership (MEP) of the National Institute of Standards and Technology (NIST), Penn State’s Center for Innovative Materials Processing through Direct Digital Deposition is sending an open invitation to Small to Medium Enterp...
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