In order to remove disturbance caused by the single output and input fiber Y-structure,this paper introduces a design of a new-type fiber optic acoustic sensor by adopting the double concentric circles fiber structure.

In order to solve the slag problem on the heat transfer surface of a six corners tangentially fired boiler, the primary air and secondary air of the top burner were arranged in the homocentric two tangential circles, PDA(Particle Dynamics Analyzer) gas-solid two-phase technology was used to identify the cause for salg by comparing the changes in concentration for these two case.

A concentric circles-based method is proposed in the paper to find the distortion center.

To improve the measuring precision of photoelectronic measurement system for curvature (important status parameter of cannon),a real-time distortion correction method with concentric circles as onsite standard is proposed and a set of measuring apparatus with self-center adaptation is designed.

This paper presented a Hough transform-based detection method of concentric circles.

Cultural Management: Supreme State of business administration——From the Perspective " Yueda s culture concentric circles resonance system ";

, invariant moments features and concentric circles features, which are invariant in translation, rotation andscale, are proposed.