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.

This paper introduces the construction layout for the earth and rock projects,which is concluded by the practice,its main thought is got from using increasingly approximating method and straight line interpolation.

Capacitor self-calibration technique used in time-interleaved successive approximation ADC;

SDP with successive approximation and its application in the operation of multireservoir system;

According to IEEE standard for short time disturbance of power quality,a fast successive approximation classification method is developed.

By taking the data sample of a large number of steel performance index data,using the progressive approaching method and mixing analytical method,the quality of the reinforcing bar tension has been measured and analysed.

A study of the free falling body by using gradual approach method;