In order to make the relationships between sub-image′s matching probability and its correlation length and terrain entropy more monotonous,cross-correlation instead of auto-correlation was employed to calculate sub-image′s correlation length and standardization of the sub-image′s mean was introduced to calculate its terrain entropy.

The generalized longcorrelation(GLC) model, which can be used to synthesize more kinds of visible texture than the Markov random field(MRF) model, is a model introducing the parameter of correlation length based on the MRF.

As an example, we study the characteristics of seismological precursors (seismic spatial correlation length and coda Q_c) associated with the earthquake (M_S=6.

Because of the restrictions to the coherent length of laser in holograph,the object field can not be recorded as a whole,in addition,the object image becomes obscure and even has some dark(areas).

The method of measuring the coherent length of the sunlight and the thickness of glass with Michelson interferometer is presented.

The optical interference and coherent length of light source with different spectral width are compared and analyzed.

The ratiocination formular of multiple thread crossing length of the main/subsidiary screw;

The research of short coherence length of the all-solid multi-longitudinal mode green laser;

Revision to coherence length of slant path in atmospheric turbulence

In light of the theory of Gimzburg Laudau, this paper elaborates critical fields of the ideal Type II superconductor at mixed state, and comes to the conclusion that lower critical field Hc1 depends on depth of penetration λ and coherence length ξ, upper critical field Hc2 depends on quantity α.