A Study on Evaluation of Relative Strength for Different Polymer Gels Used at Oil Fields;

The early-age relative strength-simplify maturity equation was concluded from this research and the relative strength when simplified maturity reached 600d was discussed.

Based on the preliminary researches on tube clearance, overdistension measure, total distension measure, weld relative strength, destructive pressure test in producing copperaluminum combined columnwingtype radiator, discusses crucial skills to improve the technical and provides the basis for manufacture and standardization of the radiator.

Observations of the relative intensity of the Zeeman effect of Hg and measurement of the Landé g-factor;

Determination of relative intensity for Zeeman spectrum line of HgI;

At first, the authors numerically calculate many apparent polarizability sounding curves of various IP ore bodies below undulatory terrain by using the improved 2 dimension finite element program, then present the relative intensity method locating the target on mountainous districts for Fixed Point Source Sounding(FPS).

In order to eliminate the head loss caused by valves,a mathematical model has been established for the relationship between the coefficient of minor loss and the relative opening degree of gate valve through ex- periments,and then verified through the comparison of the actual values with calculated values.

The regulation on the primary flow adjustment intensity of gate valves varying with the relative opening degree is obtained by experiments, and it is shown that the maximum flow adjustment ability of valves depends on themselves structures.

A criterion for the relative acidic strength of inorganic oxyacid and its application;