Thermal image spatial frequency of natural scene is far smaller than its visible light image, but in the imaging process of staring infrared FPA, spatial frequency of the detected scene is still more than half of the sampling frequency of staring infrared FPA, under-sampling happened, and the quality and utility of the image is seriously degraded by aliasing.

Phase theory analysis of spatial integral sampling provide theoretical basis for under sampling aliasing reduction.

Without any activator, fly ash, granulated blast furnace slag and some natural mineral powders were mixed and the proportion was optimized, which results in a synergistic effect of the components.

According to the angle of concrete fracture mechanics,this paper describes the brittleness of High-Performance Concrete(HPC),discusses its fracture toughness and influential factors,and proposes compensating measures for concrete toughness using super-additive effect analysis,in order to ameliorate the brittleness of concrete and further improve its durability.

Through a deep study of the object-overlapping effects and plenty of experimen.

This method can be used in solving the problem of "effect piling up" and "effect weakening" so that such problems can be solved impartially, improving the quality of supervising, safeguarding the lawful rights and intere.