Through the research and analysis on current status of XML structure clustering,this paper puts forward a new method for XML documents structure similarity measure named DBTD,on this basis it proposes DBSCAN density-based method for clustering structure of XML documents.

The measurement of DMTA and SEM was used to study the morphology and structure of the cured epoxy, identifying the degree of phase segregation and the effect of toughening in the cured epoxy.

Its morphology and structure are analyzed by transmission electron microscope and infrared spectrometer.

Histo morphology and structure of female reproductive ducts in Bactrian camel were investigated by histological methods.

Characterization of down morphological structure;

Effect of alkali treatment on morphological structure and mechanical properties of PTT fiber;

Study on the crystallization properties and morphological structure of cationic dyeable polypropylene fibers;