排序方式: 共有2条查询结果,搜索用时 15 毫秒
1
1.
By Fourier analysis techniques and Schauder fixed point theorem, we study the existence of periodic solutions for a class of even order differential equations with multiple delays. The result obtained is a generalization of the results developed by W. Layton to the case of multiple delays. 相似文献
2.
The quality of the novelty filter image is investigated at different
intensities of the incident blue and yellow beams irradiating a
bacteriorhodopsin (bR) film. The relationship between the transmitted blue
beams and the incident yellow beams is established. The results show that
the contrast of the novelty filter image depends on the lifetime of longest
lived photochemical state (M state). These results enable one to identify
the direction of a moving object and to improve the quality of the novel
filter image by prolonging the lifetime of M state. 相似文献
1