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- ZHANBING BAI, YIFU WANG
- 2003

We obtain sufficient conditions for the existence of at least three positive solutions for the equation x′′(t) + q(t)f(t, x(t), x′(t)) = 0 subject to some boundary conditions. This is an application of a new fixed-point theorem introduced by Avery and Peterson [6].

- Jiashan Zheng, Yifu Wang
- Computers & Mathematics with Applications
- 2016

- Yinghua Li, Yang Cao, Jingxue Yin, Yifu Wang
- 2011

This work is supported by National Natural Science Foundation of China, Specialized Research Fund for the Doctoral Program of Higher Education, 973 Program (2010CB808002) , China Postdoctoral Science Foundation and the Fundamental Research Funds for the Central Universities. Emails: Y. Li: yinghua@scnu.edu.cn, J. Yin: yjx@scnu.edu.cn, Y. Wang:… (More)

- Yifu Wang, Yiming Wang
- Appl. Math. Lett.
- 2005

Tilt correction is a very crucial part of the Vehicle License Plate (VLP) automatic recognition. In this paper, according to the Weighted Least Square Method (WLSM), the VLP region is fitted to a straight line and then the line slope a<inf>1</inf> is obtained, by which the rotation angle a α is calculated. Finally the whole image is rotated by… (More)

- Guosheng Zhang, Yifu Wang
- Applied Mathematics and Computation
- 2007

- Guosheng Zhang, Yifu Wang
- Mathematical and Computer Modelling
- 2011

- Xiping Yang, Yifu Wang
- Computers & Mathematics with Applications
- 2010

In this paper, we are concerned with a two-competition model described by a reaction–diffusion system with nonlocal delays which account for the drift of individuals to their present position from their possible positions at previous times. By using the iterative technique recently developed in Wang et al. (2006) [14], the sufficient conditions are… (More)

- Jiashan Zheng, Yuanyuan Ke, Yifu Wang
- Computers & Mathematics with Applications
- 2015

This paper is concernedwith a parabolic problemwith hysteresis effects in the heat source, which models the feedback control. The existence of periodic solutions is proved by the viscosity approach when the heat force changes periodically in time. More precisely, with the help of the subdifferential operator theory and the Poincaré map, the existence of… (More)

- ZHANBING BAI, YIFU WANG, WEIGAO GE
- 2004

In this paper, by combining a new maximum principle of fourth-order equations with the theory of eigenline problems, we develop a monotone method in the presence of lower and upper solutions for some fourth-order ordinary differential equation boundary value problem. Our results indicate there is a relation between the existence of solutions of nonlinear… (More)