We have proposed a technique to measure the ultrasonic attenuation of the scattering medium such as human liver by processing the data sampled from its linear-scanned B-mode images. Generally, shorter lateral sampling interval improve the accuracy, but too short sampling interval makes no difference...
2.Heapspace Heappsace与permGen区域存放的东西不同,主要是存放java运行时产生的对象,他们是GC(Garbage Collection)在运行期间会定时进行清理的.所以当在JVM中如果98%的时间是用于GC且可用的Heapsize 不足2%的时候将抛出"java.lang.OutOfMemoryError: Javaheapspace"的错误.原因是对象的产生上限以达到jvm的上限 . 解...
We measured the difference in an experimental value of a phase of the received signal against a true value. Measurement error according to the phase characteristics of the sound probe is added to the TOF. The TOF calculated from the experimental value of the phase has the measurement error and...
The designed PMUT array probe is mainly composed of a metal-protecting shell, piezoelectric film linear array, backing damping block, acoustic impedance matching layer, wedge block and sound absorbing block, as shown in Figure 1. Piezoelectric films are selected from PZT-5H material with high piez...