an elevation focus of 50–70 mm and a sensitivity of around −69 to −95 dB. All measurements were conducted following a standard ultrasound probe operational procedure. The blood flow was measured on t
A conventional acoustic phased array is illustrated in Fig.1a. By incorporating a static phase gradient, conventional phased arrays are able to “transmit” pressure waves that travel in a desired direction in the free space (e.g.,\(\theta _s\)in Fig.1a as indicated by the green arrow)....
Tests of such a digital phase modulator 130 indicate the correct length-dependant phase shift at fixed bias values. Further detail concerning the digital phase modulator 130 are disclosed in a U.S. patent application filed Mar. 19, 1992, entitled Digitally Controlled Distributed Phase Shifter by ...
We expect that further tests using probe signals from drones or multifrequency satellites will both hone our understanding of the technique and set tighter constraints on beam models of the MWA tile. Still unknown, though, are the effects of these errors on ongoing MWA Epoch of Reionization ...
Consistent with the ABBA-BABA tests, a certain number of reads from the two ancient genomes and Han genomes were mapped against this region, but no mapping was found for AFR, EUR, Oceania, and AMR populations (Fig. 6d). A comparison of CN1 with the phased assemblies in HPRC47 showed ...
sensors Article Ultrasonic Phased Array Compressive Imaging in Time and Frequency Domain: Simulation, Experimental Verification and Real Application Zhiliang Bai, Shili Chen *, Lecheng Jia and Zhoumo Zeng State Key Laboratory of Precision Measurement Technology and Instrument, Tianjin University, Tianjin ...
Ingber, L. Simulated annealing: Practice versus theory. Math. Comput. Model. 1993, 18, 29–57. [CrossRef] 59. Hunter, A.J.; Drinkwater, B.W.; Wilcox, P.D. The wavenumber algorithm for full-matrix imaging using the ultrasonic phased array. IEEE Trans. Ultrason. Ferroelectr. Freq. ...
phased array; velocity correction; genetic algorithm; full matrix capture; CFRP1. Introduction Carbon fiber reinforced plastic (CFRP), in which the lightweight, high strength, and preferable toughness are provided [1,2], has been broadly used in aircraft and hydrogen fuel cell vehicles (e.g.,...
Figure 19 shows the distributions of 100 OMP tests when 20 MHz SR experimental data is used and the CR is 50%, which completely reach the 3σ criterion of reliability theory. Figure 18. Comparative (a) PSNR, (b) SSIM between different SRs in frequency domain, using experimental through-...
Thus, GA-MMC was successful in more than 90% of the tests for each application, increased the fitness of the final population by more than 20% and reduced the premature convergence. Keywords: rocket tracking systems; phased array radars; radiation pattern control; genetic algorithm; maximum-...