Objective To orient the activated charge regions in central nervous systems under the situation with premature contacts,and to consummate the theories of modulation in stomotognathic systems for the diagnosis and treatments of occlusal disorders.

Survey on occlusion pattern in patients with cracked tooth syndrome of natural tooth;

Establishment of three-dimensional solid and finite element model of temporomandibular joint with occlusion;

Study of stress distribution in mandibular first premolar restored by composite resin with root screw of different length in different occlusion;

The Discontinuous Deformation Analysis(DDA)is first adopted into dynamic modeling of the structural patterns,forms,displacement and key stratum for arches withthree grips'and ‘grip beams’in excavated rockmass,and some significant conclusions are reached.

Studies of the wear resistance and anti-adhesion of 20# and 45# steel formed in austenitic ion-nitrocarburising and comparisons to the general ion-nitrocarburising are presented in this thesis.

The Wear Resistance and Anti-adhesion of Steel Formed in Austenitic Ion-nitrocarburising;

B multi-cementation process improves greatly the anti-seizure ability, wear endurance, thermal stability and service life of tool steel.