A measurement method of a precision image for space between rasters based on image analysis is introduced.

The optimality analysis of the distance between gates in the design of triple-gates switches is described.

Based on the information coming from the papers which can be got,some researchers have worked out the first wavelength encoded fiber optic position sensor prototype employing varied line-space grating in our country through several years\' hard work.

For frequent alarms existing in inlet pump in operation,this paper analyzes the reasons and presents measures such as removing the outer casing of the inlet pump and reducing the space between bars of coarse screen to strengthen the intercepting effect of the coarse screen which ensures a safe and stable operation of the inlet pump.

A numerical method for the calculation of unsteady stator/rotor interaction in turboma-chinery stage of arbitrary pitch ratio using time-inclined operator is presented.