The principle of empirical mode decomposition (EMD) and concept of shape factor are introduced.
介绍了经验模态分解法（EMD）的原理及波形指数的概念。
2
The initial sensor assignment is obtained by the QR decomposition of the structural mode shape matrix to ensure the estimation accuracy of the parameters.
利用结构振型矩阵转置的QR分解得到传感器的初始配置。
3
The binder could be quickly removed by catalytic decomposition using HNO_3 gas as catalyst, and debound part has good shape retention and no obvious defects.