Based on the present research situation of system engineering methodology,some basic methods and theories of safety system engineering were given;the four dimensional morphology chart of safety system engineering methodology was put forward.

The classification of management is based upon the four-dimensional structure of management .

Based on the current situation of document management in project management on owner′s side,the paper presents the method of four-dimensional structure document management,the flow of document transmission,the four figure coded structure of document and main types of documents,finally,analyzes a case to prove the scientific theory.

Research into the First Generation of Communist Intellectuals Group Structure;

The Study of Social Group Structure for the Village in the City;

Objective To explore the present group structure and development tendency of clinical department heads of affiliated hospitals of a military medical university.

The population structure of the single japonica rice cropping with super-high yield;

Comparison of plant morphology and population structure and photosynthetic characteristics among a series of near-isogenic lines with different leaf rolling index in rice;

Effect of population structure on the yield and chalky rice rate in hybrid rice;