DEFECT AND IMPROVEMENT OF TWO-TIME EXPANSION METHOD IN NONLINEAR OSCILLATIONS

In this paper, the defect of the Two-Time Expansion method is indicated and an improvement of this method is suggested. Certain examples.in which the present method is used, are given. Moreover, the paper shows the equivalence of the improved Two-Time Expansion Method and the method of KBM(Kryloy-Bogoliuboy-Mitropolski).

遗传算法改进策略研究进展

针对遗传算法存在局部极小等缺陷,近年来,各种改进措施层出不穷。本文对遗传算法的改进历程进行了较详细地综述,并指出了其未来改进措施的发展趋势。此外,本文阐述了遗传算法仍有待克服的缺陷,以供相关学者参考。