Experimental results show that the improved algorithm can extract all boundaries exactly for images with varieties of complex patterns and reduce the computation cost for the images with high run average compression ratio.

7 mm in seven and nine pass,with average pass draught of 21.

By making use of a louver concentrator test system,a study was conducted of the effect of rotating angles of blades in five stages on the performance parameters of the concentrator (dense-thin air ratio R1,resistance loss coefficient D and average concentration rate R2).

The average compression curve of soil layer is the basis of calculating the building settlement and its dispersion has great matter with the validity of the calcutation result.