China Vitae

Biography

Li Yanda, male, Han nationality, is a native of Nanhai. He graduated from Tsinghua University.

Li served as professor at Tsinghua University. His primary research involved signal processing theory and seismic prospect data processing methods. In the study of signal reconstitution theory, Li put forward new theorems in which extent spectrum and some sampling points are applied to reconstruct signals, making sampling points for certain reductions. He also introduced new methods in which time delay is estimated by using phase reconstruction techniques. He put forward new algorithms in which only the extent spectrum is used to reconstruct minimum phase signals. Concerning the problem of using incomplete projection to reconstruct an image, Li and his colleagues put forward a new projection relations theorem. Concerning the study of applying signal processing and pattern recognition techniques to seismic prospect data processing, Li put forward new methods in which pit survey data is applied to improve the resolution of seismic cross sections and the process in which the high resolution speed spectrum is estimated.

Li and his colleagues also put forward the method in which the POCS image recovery technique is adopted to resume the section of wave impedance. Subsequently he developed a wavelet estimation and deconvolution method that is based on zero point and vertex. Li also produced a new method where transformation is adopted to eliminate multi-order wave and comprehensive geological pit surveys, and seismic data is adopted to predict reserve layer distribution.

Li Yanda was elected as an academician of the Chinese Academy of Sciences in 1991.

Career Data