Then being improved based on this,a particle system which could be used to define its figure freely by adjusting the parameters and overriding the virtual functions easily is constructed.

The process on virtual function by c++ (OOP language),compilier is introduced i n this article And several cases in rewriting the child class in base class are also dicussed here to help the programmer deepen recognition on virtual functio

In this paper,by analyzing the virtual function table of its key skills,the process and essentials of the dynamic merging technique are interpreted.

This paper estimated China\'s industrial cost by taking virtual cost approach.

Median regression was performed to estimate the multi-output cost function and marginal cost of discharge patients,and scale economies were calculated.

The paper discusses the broad applicability of the railway transport trans-log cost function under the condition of different research aim,studies the variables selection of China passenger / freight transport cost function and depicts on the practical application of railway transport cost function in the research on railway economic problem.

In this paper,by using cost functions of flights,a model is presented to schedule aircraft landings,which satisfies the landing intervals and separation constraints,and puts forward a heuristic algorithm by using local search and linear programming.