Under the conditions that the repairman vacation time is respectively random variable and constant,replacement policy is considered based on the working.

Assume that the system after repair is not "as good as new", by using geometric processes we consider a replacement policy N based on the f.

An optimal replacement policy for series repairable system is studied assuming that the component after repair is not "as good as new" by using the geometric process model.

Improvement of four-step commutation strategy for matrix converter based on two line voltage synthesis;

Improvement of commutation strategy of matrix converter;

Aiming at safe commutation and improving quality of output waveforms,the paper presents a new varying-step safe commutation strategy of matrix converter by analyzing the character of traditional four-step commutation and improved four-step commutation strategy.

The on-line reasoning optimal shifting strategy was realized by means of Motorola single-chip computer s characteristics and fuzzy control instructions.

Then an improved algorithm called radial basis function-FAR(RBF-FAR) algorithm is proposed as replacement policy,which uses RBFNN to predicate next location instead of velocity in FAR.

This paper proposes an improved compressed cache replacement policy——Modified LRU Replacement Policy for Compressed Cache(MLRU-C) based on modified Least recently Used(LRU) policy for improving compressed cache replacement policy.

The integrated query strategy and the replacement policy are discussed.