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This paper investigates the multiplicity of positive solutions for a class of nonlinear boundary-value problems of fourth-order differential equations with integral boundary conditions in ordered Banach spaces. The arguments are based upon a specially constructed cone and the fixed point index theory in cone for strict set contraction operator. The nonexistence of positive solution is also studied. Meanwhile, an example is worked out to demonstrate the main results. 相似文献
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Meiqiang Feng Xuemei Zhang Weigao Ge 《Journal of Mathematical Analysis and Applications》2008,338(2):784-792
In this paper, exact number of solutions are obtained for the one-dimensional p-Laplacian in a class of two-point boundary value problems. The interesting point is that the nonlinearity f is general form: f(u)=λg(u)+h(u). Meanwhile, some properties of the solutions are given in details. The arguments are based upon a quadrature method. 相似文献
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Meiqiang Feng 《Applied Mathematics Letters》2011,24(8):1419-1427
This paper studies the existence of symmetric positive solutions for a second-order nonlinear ordinary differential equation with integral boundary conditions by applying the theory of fixed point index in cones. For the demonstration of the results, an illustrative example is presented. 相似文献
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Spectral analyses of vinylneoxantho- and vinylisoneoxanthobilirubic acid methyl esters, with endo and exo-vinyl groups respectively, show that the exo-vinyl group causes (1) a greater bathochromic and hyperchromic shift of the long wavelength UV-vis absorption and (2) a smaller dimer association constant in CDCl3 than does the endo-vinyl in these pyrromethenones. 相似文献
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Meiqiang Feng Hanying Feng Xuemei Zhang Weigao Ge 《Mathematical and Computer Modelling》2008,48(7-8):1213-1226
This paper deals with a class of second-order nonlinear m-point dynamic equation on time scales with one-dimensional p-Laplacian. Using a fixed point theorem for operators on a cone, we provide sufficient conditions for the existence of at least three positive solutions to the above boundary value problem. The interesting point is that the nonlinear term f is involved with the first-order delta derivative explicitly. Meanwhile, an example is worked out to demonstrate the main results. 相似文献
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Hierarchical NiCo2S4 Nanotube@NiCo2S4 Nanosheet Arrays on Ni Foam for High‐Performance Supercapacitors
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Dr. Haichao Chen Si Chen Hongyan Shao Dr. Chao Li Dr. Meiqiang Fan Dr. Da Chen Dr. Guanglei Tian Prof. Dr. Kangying Shu 《化学:亚洲杂志》2016,11(2):248-255
Hierarchical NiCo2S4 nanotube@NiCo2S4 nanosheet arrays on Ni foam have been successfully synthesized. Owing to the unique hierarchical structure, enhanced capacitive performance can be attained. A specific capacitance up to 4.38 F cm?2 is attained at 5 mA cm?2, which is much higher than the specific capacitance values of NiCo2O4 nanosheet arrays, NiCo2S4 nanosheet arrays and NiCo2S4 nanotube arrays on Ni foam. The hierarchical NiCo2S4 nanostructure shows superior cycling stability; after 5000 cycles, the specific capacitance still maintains 3.5 F cm?2. In addition, through the morphology and crystal structure measurement after cycling stability test, it is found that the NiCo2S4 electroactive materials are gradually corroded; however, the NiCo2S4 phase can still be well‐maintained. Our results show that hierarchical NiCo2S4 nanostructures are suitable electroactive materials for high performance supercapacitors. 相似文献
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Xuemei Zhang Meiqiang Feng Weigao Ge 《Journal of Mathematical Analysis and Applications》2009,353(1):311-411
By using Mawhin's continuation theorem, some sufficient conditions for the existence of solution for a class of second-order differential equations with integral boundary conditions at resonance are established, which are complement of previously known results. The interesting point is that we shall deal with the case dimKerL=2, which will cause some difficulties in constructing the projector Q. Since all the existence results obtained in previous papers are for the case dimKerL=1, our work is new. 相似文献
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