The system first obtains the data carrying temperature information via High-Speed acquisition card, and then decreasing the noise from the data using method including synchronization accumulation, digital accumulation and Wavelet Transform, at last acquired accurate temperature data by OTDR demodulation.

In this paper,the factors which influence the high speed and accuracy CNC machining are analyzed,and a cubic spline interpolation algorithm is presented,which takes the accumulated chord as its parameter.

To build an unified,compact,and quick method of grid generation of ship wet surface and increase the efficiency of ship hydrodynamics analysis,the accumulative chord length theory was used to preprocess the data of offsets.