Spreading-Activation theory is one of theories of cognitive semantics.

Based on the cognitive model of spreading activation, comprehensive cross-reference should be set up in these dictionaries.

Based on the spreading activation theory with respect to psycholinguistics,some comments are made on the learning-enhancing dictionary s functions in word distinction,word origin,word formation,word associations and references,etc,which can effectively enlarge readers vocabulary.

English and Chinese premodifers in nominal constructions are organized mentally in a spreading activation process,in which the speaker responds to given stimuli and activates concepts realized by premodifiers and the head noun in a certain sequence.

The current semantic memory models include hierarchical network theory,spreading activation network,the sensory/functional theory,conceptual structure account,do.

The diffusion factors such as diffusion activation energy,diffusion constant and diffusion coefficient were obtained by measuring the thickness of boriding layers of T8 steel in different temperatures and times under microwave field.

Using first-principles pseudo-potential plane wave method,the diffusion of Ru and Al in B2-RuAl alloy has been calculated in different situations,and scaled the chemistry reaction by using diffusion activation energy.

Moreover, the diffusion fac-tors such as diffusion activation energy and diffusion rate constant of the Q235 steel were analyzed with kinetics method according to the thickness of the boronized layers under different temperatures.

The activation energy and frequency factor were calculated by Arrhenius equation at different concentrations,the maximum values of the two parameters appear at y(Mo)≈35%.

Study of diffusion energy of strain quantum well with thermal annealing