Based on the Yu Maohong s unified strength theory,a new method is proposed to study dynamic strength parameters of geomaterials and strength theory under the complex stress state.

Shear failure of compacted loess in different frequencies is studied using a torsion shear apparatus and the effects of frequency on dynamic strength and dynamic strength parameter are investigated.

The determination of strength and mechanical parameters of massive jointed rock mass is a difficult problem.

Based on them, the intensity parameters and crystal field parameter of Eu3+ were obtained.

The emission, phonon-side band spectra and fluorescence lifetimes of these glasses were studied and the intensity parameters Ω 2 of Eu 3+ were obtained.

Combined with specific calculation example,the influencing degree of linear intensity parameter and non-linear intensity parameters on slope stability was compared and analyzed,the influencing mechanism of two intensity parameters on safety coefficient were pointed at the same time.

Analysis of deformation and strength parameters for cohesive clay;

Primary exploration on relation between strength parameters of salt-bearing soil and water content and salt content;

Neural network prediction for strength parameters of landslide zone soil;