The substitution of the medium-polar carbowax 20 Mfor the poalrer carbowax 2000 in the preparation of the gas chromatographic columns increases the column efficiency and the chronatographic separation degree.

The effects of temperature,flow rate and composition of mobile phase on retention,resolution,column efficiency and the pressure of the system were examined.

The temperature-control accuracy of gas chromatograph,mode of entry of liquor samples from vaporizing chamber after vaporization to chromatographic column,DNP chromatographic column efficiency,and liquor analysis time length etc.

The column efficiency of parallel connected multicolumn was studied.

Based on the equation for estimation of bubble sizes in a freedom bubbling fluidized-bed studied by former researchers, the influence of vertical inner structures of the bed on the bubble sizes was taken into account and a concept of “equivalent column” was proposed.

The merit and the limitation of ETABS and PUSH program are also pointed out,the method of equivalent columns taking the place of walls in ETABS is made further investigated on the basis of document 2.

The new method of the static elasto-plastic analysis (Pushover analysis) is reviewed for structures with shear wall (tube structure),in which the shearwall is replaced by equivalent column based on the equivalent principal of the inelastic response and internal forces between the shearwall and equivalent column.

A newkind of column efficiency evaluation methoo —evaluating column efficiency by transition times;