Theory of Piezoelectricity; Bulk, Surface and Guided Acoustic Waves; Design and Analysis of Piezoelectric Devices; Manufacturing Technology of Piezoelectric Devices; Piezoelectric Materials, Ferroelectric Materials and Thin Film;Piezoelectric Semiconductor; Piezotronics and Piezo-phototronics; Electrical, Magnetic, Thermal, Elastic Multi-field Coupled Elastic Waves; Elastic Waves in Composites and Functionally Graded Materials; Ultrasonic and Ultrasonic Nondestructive Testing Technology; Oscillators and Filters; Sensors, Actuators and Energy Harvesters; Ultrasonic Vibration and Its Application Methods and Techniques; Fault Diagnosis Technology Based on Piezoelectric Devices; Ultrasound Imaging, Drug Delivery and Therapy; Medical Ultrasound and Transducer