This paper proposes an optimization method on the plate shaving cutter,its optimal solu- tion is the premises matching the smallest toothing angle on the condition of the last cutting grinding.

By the optimal combination analysis on the factors, the optimal combination of the factors were determined.

The principle is using spline B to fit the curve and having the aid of the least square method to do the best fitting and diviation processing.

This paper put forwards a method which optimizes utilize of DeficitCounter by combination of operation streame best fitting for DeficitCounter based on mechanism of queue schedule Deficit Weighted Round-Robin(DWRR).

Furthermore,it mainly analyzed the available range of different seismic prospecting methods,main achievements and solutions,and discussed the best combination of seismic exploration methods for detecting crustal structure and locating the faults used in the present stage,that is,to trace.

The effectiveness of classifier combination and the problem of best combination both have to be solved.

This paper has studied the charateristics of laser diode and fiber by using gradient-index lenses with spherical end surface,optimizing coupling condition has be given in this paper.