By choosing The Times of cumulative AE events and based on the b-value variation in the relation between magnitude and frequency, the precursor information of rock burst was studied.
根据需要选择声发射累计数、震级-频度关系中的b值变化规律，研究了砂岩岩爆的前兆信息。
2
It not only can show the anatomical structure of human beings through B-mode image, but also can display information such as magnitude and direction of blood flow velocity.