This paper attempts to account for definiteness restriction effect and its exceptions in English existentials based on the constructs of mental space,mental contact and search domain in cognitive grammar.

Generally,the packing inflences persons by comprehensive sense of touch,which is formed with the psychological touch and the physiological touch.

Through eliminating voids that did not affect the primary bonding process,and incorporating interlayer and flexible base material,the interface geometry model of physical contact with real geometry character and brief mathematics process was put forth.

Through analyzing physical contact process of phase transformation diffusion bonding,contact area model was settled.

The flexible contact theory is applied to calculate eccentricity of this kind of rotation way.

It is found that a new mechanism of moving contacts emerges, based on kinematic principles which has completely different properties from conventional contact theory.

To analyze the bending resistance of the steel-concrete composite beam(CB) accurately,a new finite element stiffness equation of the CB in the structure under the vertical loads was derived based on the contact theory.