Hilbert transformation and improved ellipse localization method is applied in ultrasonic transducer array tomography to detect defect of metal plate.By combinin
Based on a great number of laboratory experiments,a new technique has been developed for producing wear resistant ring-hammers.In this technology,lost foam cast
This paper addresses the clustering problem for mobile ad hoc networks.In the proposed scheme,Doppler shift associated with received signals is used to estimate
An S-band wideband chirp generator using specially designed fast lock phase lock loop (FL-PLL) was demonstrated.To realize high linearity,structure of direct di
Cavitation number and speed are capable of variation during the motion of supercavitating vehicle underwater,for example,under the condition of accelerated moti