## GEOPHYSICS: Vol 0, No ja

A quantitative calculation method for fracture density utilizing the neutron self-shielding modification and neutron-induced gamma logging Feng Zhang, Qian Chen, Juntao Liu, Quanying Zhang, Lili Tian, Jilin Fan, Qixuan Liang, Fei Qiu, and Xianghui LiThe Seismic Wave Equation - University of California, San ...2010-1-8 · by the elastic properties and density of the medium, and these pulses are often decomposed into harmonic wave solutions involving sine and cosine functions. Stein and Wysession (2003, section 2.2) provide a useful review of the 1-D wave equation as applied to a vibrating string, with analogies to seismic wave propagation in the Earth.