Results 71 to 80 of about 8,509,903 (292)
Multiple Positive Periodic Solutions for Delay Differential System [PDF]
Discrete Dynamics in Nature and Society, 2009 We obtain some existence results for multiple positive periodic solutions of some delay differential systems. Examples are presented as applications. For a general positive integer m ≥ 2, main results of this paper do not appear in former literatures as we know. Comparing with the existing results, our results are new also when m = 1.
Zhaocai Hao, Ti‐Jun Xiao, Jin Liang
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FEBS Letters, EarlyView.Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure +3 more
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On Balancing and Order Reduction of Unstable Periodic Systems [PDF]
, 2001 Abstract: We consider the direct application of balancing techniques to unstable periodic systems by extending the balancing concepts to arbitrary periodic systems. We extend first the balancing concepts to unstable discrete-time systems by defining the
A. Varga, Varga, Andras
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四川大学学报. 自然科学版, 2022 In this paper, we study the existence and uniqueness of positive solutions for the periodic boundary value problems of a class of first order ordinary differential equations.
HE Ting
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The human gut microbiome across the life course
FEBS Letters, EarlyView.Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero +4 more
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四川大学学报. 自然科学版, 2019 In this paper, we consider the existence of positive solutions of a nonlinear second-order periodic problem. The proofs of the main results are based on the fixed point index theory in cones.
LI Zhao-Qian
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New results for Brillouin electron beam focusing system
Boundary Value Problems, 2017 An experimental conjecture on the existence of positive periodic solutions for the Brillouin electron beam focusing system x ″ + a ( 1 + cos 2 t ) x = 1 x $x''+a(1+\cos 2t)x=\frac{1}{x}$ for a ∈ ( 0 , 1 2 ) $a\in(0,\frac{1}{2})$ is proved by applications
Zhibo Cheng, Shaowen Yao
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Positive periodic solutions of second-order differential equations
Applied Mathematics Letters, 2007 The authors consider the second-order nonlinear differential equation \[ x''(t)+a(t)x'(t)+f(t,x(t))=0, \] where \(a(t)\in C(\mathbb{R},\mathbb{R})\), \(a(t+\omega)\equiv a(t)\), \(f(t,u)\in C(\mathbb{R}\times\mathbb{R},\mathbb{R})\), \(f(t+\omega,u)\equiv f(t,u)\) and investigate existence of positive periodic solutions using a fixed point theorem for ...
Weibing Wang, Zhiguo Luo
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FEBS Letters, EarlyView.We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace +6 more
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Advances in Difference Equations, 2020 In this paper, we study the eventual periodicity of the fuzzy max-type difference equation x n = max { C , x n − m − k x n − m } , n ∈ { 0 , 1 , … } $x_{n} =\max \{C , \frac{x_{n-m-k}}{x_{n-m} }\}, n\in \{0,1,\ldots \} $ , where m and k are positive ...
Caihong Han +4 more
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