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71.
该文考虑一类退化中立型微分系统,利用不动点定理,得到了这类系统周期解存在的充分条件. 相似文献
72.
Jelena Randjelovi? 《Journal of Mathematical Analysis and Applications》2007,326(1):266-280
The paper discusses the pth moment exponential stability for a general class of neutral stochastic functional differential equations of the Ito type. This investigation can be very complicated, even in many special cases, by using usual methods based on Lyapunov functionals. In this paper we present criteria which are relatively easy to verify the pth moment exponential stability of the solutions of such equations. 相似文献
73.
中立型抛物方程解的强迫振动性 总被引:2,自引:0,他引:2
本文讨论中立型抛物方程解的强迫振动,其中Ω是Rn中具有光滑边界Ω的有界区域, 相似文献
74.
Wan-Tong Li 《Applied Mathematics Letters》1997,10(6):101-106
Consider the first-order neutral nonlinear difference equation of the form , where τ > 0, σi ≥ 0 (i = 1, 2,…, m) are integers, {pn} and {qn} are nonnegative sequences. We obtain new criteria for the oscillation of the above equation without the restrictions Σn=0∞ qn = ∞ or Σn=0∞ nqn Σj=n∞ qj = ∞ commonly used in the literature. 相似文献
75.
In this paper, we consider a type of second-order neutral functional differential equations. We obtain some existence results of multiplicity and nonexistence of positive periodic solutions. Our approach is based on a fixed point theorem in cones. 相似文献
76.
Khalil Ezzinbi 《Journal of Mathematical Analysis and Applications》2006,316(2):707-721
In this work, we study the existence of almost automorphic solutions for functional differential equations of neutral type. We prove that the existence of a bounded solution on R+ implies the existence of an almost automorphic solution. 相似文献
77.
本文在长波假定下用流体力学线性稳定性理论对大动脉中血液流动求出了一种中性扰动。结果表明,心室或瓣引起的扰动在一定条件下有可能量一种中性扰动,它可以沿着动脉管无变形地传播到动脉远端。这说明也许有可能提供一种通过在远离心脏的某些浅表动脉部位检测这种中性成动以了解心脏的某些功能的新方法。 相似文献
78.
Impedimetric Detection of DNA Damage with the Sensor Based on Silver Nanoparticles and Neutral Red
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Yury Kuzin Anna Porfireva Veronika Stepanova Vladimir Evtugyn Ivan Stoikov Gennady Evtugyn Tibor Hianik 《Electroanalysis》2015,27(12):2800-2808
Novel electrochemical DNA‐sensor based on glassy carbon electrode (GCE) modified with Ag nanoparticles, Neutral red covalently attached to its surface and native DNA adsorbed on modifier coating was developed for the estimation of DNA damage on example of model system based on Fenton reagent. As was shown, the oxidation process resulted in synchronous increase of electron transfer resistance and capacitance measured by electrochemical impedance spectroscopy (EIS). The contribution of each sensor component on the signal was specified and sensitivity estimated against similar surface coatings. The shift of EIS parameters was found to be higher than that of similar biosensors reported. The DNA sensor was tested on the estimation of antioxidant capacity of green tea infusions again the results of coulometric titration with electrogenerated bromine. 相似文献
79.
《Macromolecular rapid communications》2017,38(16)
Porous polymeric monoliths with densities as low as ≈0.060 g cm−3 are prepared in a gel‐emulsion template way, of which the stabilizer employed is a newly discovered acidified aramid fiber that is so efficient that 0.05% (w/v, accounts for continuous phase) is enough to gel the system. The porous monoliths as obtained can be dried at ambient conditions, avoiding energy‐consuming processes. Importantly, the monoliths show selective adsorption to HCHO, and the corresponding adsorption capacity ( M6 ) is ≈2700 mg g−1, the best result that is reported until now. More importantly, the monoliths can be reused after drying. 相似文献
80.