This paper,based on fatigue energy theory,discusses the principle that materials'fatigue limit can be determined by thermographic method.

Setting the gravity earth-retaining wall which is the most important in earth-retaining wall as example,it gets the soil pressure calculation using coulomb theory and energy theory and makes the stability checking calculation.

Due to the limitation of the traditional theory of soil pressure applied on retaining wall, the limit analysis theory and the energy theory are adopted to calculate the limit load of rigid retaining wall.

The important influence of Einstein to the development of the quantum theory;

Couple the Quantum Theory and Gray System Theory in Software Radio Technology;

This paper discusses the nature of relativity theory, promotive actions of space-time symmetry’s principles and geometrodynamical ideas on the developments of quantum theory and cosmology.

In this paper, an object of study in EDN, the square barrier model is set up, the mechanism of electron tunnel effect is discussed in EDN, and the explanation of Bohr quantum theory is given on the spark phenomenon in EDN.

This article discusses the production of quantum theory and how Nernst advanced thermal theorem.

By using a full quantum theory, We investigate the time-evolution properties of the atomic dipole squeezing of the degenerate quantum-beat three-level atom intensity-dependently interacting with a single-mode coherent field, and explore effects of splitting of the lower energy levels .