The relations of sensitivity among state variables, measured and estimated values of voltage and power are analyzed, and then a sequential tracking stated estimation method based on sensitivity analysis is proposed.

In this paper, based on the uniform design principle, an abrasive wear test of Ti-Al coating produced by supersonic arc spraying was conducted, and a stepwise regression analysis was made.

In order to eliminate systemic error caused by different times, different labs, different analysis methods, and to solve some problems in merging maps, we propose a map adjustment theory and gradual approach method, based on a hypothesis that there are same means and standard deviate of data in adjacent small areas between maps.

By means of constructional iterative equationthis paper presents a way to give out the existence and singularity of a type of e- quational root with gradual approach method.

Kepler s equations can be solved with the gradual approach, which can be further extended to the solution of the non-linear equations.