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1.
By using Krasnoselskii‘s fixed-point theorem on a suitable cone, several existence results and corresponding properties of positive solutions of nonlocal boundary value problem for nonlinear retarded differential equation are obtained.  相似文献   

2.
A general A-P iterative algorithm in a shift-invariant space is presented. We use the algorithm to show reconstruction of signals from weighted samples and also show that the general improved algorithm has better convergence rate than the existing one. An explicit estimate for a guaranteed rate of convergence is given.  相似文献   

3.
Sub-shot-noise measurement for slight absorption is experimentally achieved with the twin beams of quantum correlation. The improvement in signal-to-noise ratio of 2.5 dB relative to the SNL is obtained. The experimental results demonstrate the predictions of the semi-classical theory. Project supported by the National Natural Science Foundation of China (Grant No. 69438010). the Science Foundation of Shanxi Province and the Science Foundation of Shanxi Province for the Scientists Coming Back from Overseas.  相似文献   

4.
In this paper, a nonlinear predator reproduction and prey competition model with diffusion is discussed. Some existence and non-existence results concerning non-constant positive steady-states are presented using topological degree argument and the energy method, respectively. The first author was supported by the National Natural Science Foundation of China (No. 10771032) and the Natural Science Foundation of Jiangsu province BK2006088, and the second author was supported by National Natural Science Foundation of China (No. 10601011).  相似文献   

5.
In this paper a necessary and sufficient condition on symbol is given for linear independence of refinable distributions supported on [0,2]×[0,2]. This project is partially supported by the National Natural Science Foundation of China (No. 69735020), the Tian Tuan Foundation, the Doctoral Bases Promotion Foundation of National Educational Commission of China (No. 97033519) and the Zhejiang Provincial Science Foundation of China (No. 196038).  相似文献   

6.
With the help of a continuation theorem based on Gaines and Mawhin's coincidence degree, several verifiable criteria are established for the global existence of positive periodic solutions of a class of non-autonomous single species population model with delays (both state-dependent delays and continuous delays) and feedback control. After that, by constructing a suitable Lyapunov functional, sufficient conditions which guarantee the existence of a unique globally asymptotic stable positive periodic solution of a kind of nonlinear feedback control ecosystem are obtained. Our results extend and improve the existing results, and have further applications in population dynamics.  相似文献   

7.
Feng Gu 《Positivity》2008,12(3):503-509
The purpose of this paper is to prove a strong convergence theorem for a finite family of uniformly L-Lipschitzian mappings in Banach spaces. The results presented in the paper improve and extend some recent results in Chang [1], Cho et al. [2] Ofoedu [5], Schu [7] and Zeng [8, 9]. The present studies were supported by “the Natural Science Foundation of China (No. 10771141),” the Natural Science Foundation of Zhejiang Province (Y605191), the Natural Science Foundation of Heilongjiang Province (A0211), the Scientific Research Foundation from Zhejiang Province Education Committee (20051897).  相似文献   

8.
Sans résumé Supported in part by a grant from the National Science Foundation. Supported in part by a grant from the National Science Foundation and the Sloan Foundation.  相似文献   

9.
In this paper the asymptotic behavior of Gibbs function for a class ofM-band wavelet expansions is given. In particular, the Daubechies’ wavelets are included in this class. The authors are partially supported by the Chinese National Natural Science Foundation (19571972), the Key Project Foundation (69735020) and the Zhejiang Provincial Science Foundation of China (196083)  相似文献   

10.
A method to decrease the level of a modular integral with a given level is advanced. Project supported by the National Natural Science Foundation of China (Grant No. 19501009) and the Natural Science Foundation of Guangdong Province.  相似文献   

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