This paper uses successive approximation methods for calculating alignments intersections horizontal alignment design.

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.

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.