supported by the National Nature Science Foundation of China(10774158).
The non-integral dimensions ultrasonic phased arrays and their scanning and testing methods in a borehole are studied. First, the focusing acoustic fields excited by the 1.25D, 1.5D, and 1.75D phased arrays are analyz...
supported by the National Natural Science Foundation of China(50775054,10774158);supported by the International Joint Research Program of China(2007DFR70070).
A nonparaxial multi-Gaussian beam model based on the rectangular aperture is proposed in order to overcome the limitation of paraxial Gaussian beam model which losing accuracy in off-axis beam fields. With the method,...