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.

In this paper,an optical alignment system is introduced using gratings with different constant for the step projection photoetching machine.

The concept of uneven blade spacing is firstly introduced into the compressor denoise studies.

The paper analysed the existing fatigue experimental data processing,and gave a nonequidistancegrey GM(1, 1) model and method on the fatigue experiment data processing and on-line control.

Based on the study of nonequidistance sequence, we have applied nonequidistance accumulated generating to the modeling of nonequidistance, and made the original model improved.

Based on the observation data from a construction in point and the gray theory, an unequal time-interval prediction model of recent information of identical dimension for ground settlement is established.

Based upon the building mechanism of unequal interval grey forecast model in order to weaken the changing scope of data,the method to extract the m root of accumulated sequence was used.

Unequal interval grey revised model was built based on unequal interval grey model and grey revised model,which is fit for the original series with unequal interval and sharp variations.

According to the building mechanism of gray model,a combination forecast method of unequal interval gray forecast model is presented to solve practical problems for the number sequences.