3Yong-Kul Ki,Doo-Kwon Baik. Vehicle-Classification Algorithm for Single-Loop Detectors Using Neural Networks[M].IEEE,2006.1704-1711.
4Glenn Washer,Paul Fuchs. Ultrasonic Testing of Reactive Powder Concrete[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2004,(02):193-201.