Ϊ������������ٶ������ݽ���ѹ��Ԥ���׼ȷ�ȣ���������ɷַ���( PCA) �ж�׼��Ӧ�õ�˫�����ٶ�ɨ������ʰȡ�����ٶȣ��Ӷ�����ɨ������ʱ���ŷ�����������Ӽ�ƫ�ƾ���������ɵ�ƫ����������ٶȲ�����ʱ�����Ӧ�õ��Ľ���Fillippone ��ʽ�У�������ѹ��Ԥ��ľ��ȡ�

In order to improve the accuracy of pressure prediction relying on seismic velocity spectrum��the authors combine the principal component analysis ( PCA) criterion in bispectral velocity scanning to pick up seismic velocity��which can reduce the errors by the increase of reflecting layers and offeset in data scanning�� Applied the velocity and time parameters in the Fillippone formula��the pressure prediction was improved in accuracy��