نتایج جستجو برای: approximately inner dynamical system
تعداد نتایج: 2526923 فیلتر نتایج به سال:
Consider a Dynamical system x'=F(x,µ) such that its linear part has a pair of imaginary eigenvalues and one zero eigenvalue (Hopf zero singularity). Recently, the simplest normal form for this singular system has been obtained by sl(2) Lie algebra theory and the decomposition of space into three invariant subspaces. The normal form of this singular system is divided into three general cases. In...
In the inner crust of a neutron star, due to the high density and pressure, nuclei which are still present, are immersed in a neutron superfluid. One then expects that the dynamical properties of nuclei are significantly affected. In order to estimate the magnitude of the effect associated with the presence of a superfluid medium, we formulate the hydrodynamical approach to the nuclear dynamics...
Usually mathematicians use Hodgkin-Huxley model or FitzHug-Nagumo model to simulate action potentials of skeletal muscle fibers. These models are electrically excitable, but skeletal muscle fibers are stimulated chemically. To investigate skeletal muscle fibers we use a model with six ordinary differential equations. This dynamical system is sensitive to initial value of some variables so it is...
CSs have been theoretically predicted and recently experimentally demonstrated in broad area, vertical cavity driven semiconductor lasers (VCSELs) slightly below the lasing threshold. Above threshold, the simple adiabatic elimination of the polarization variable is not correct, leading to oscillatory instabilities with a spuriously high critical wave-number. To achieve real insight on the compl...
سیگنال تغییرپذیری نرخ ضربان قلب (hrv) یک ابزار غیرتهاجمی مشهور برای ارزیابی وضعیت سیستم قلبی- عروقی و نیز اعصاب خودمختار می?باشد. تحقیقات اخیر نشان داده?اند که ساختار مولد این سیگنال، یک ساختار خطی ساده نیست بلکه شامل مولفه?های غیرخطی می?باشد که به عوامل هورمونی و نورونی وابسته است. لذا از آنجاییکه تحلیلهای کلاسیک، تنها رفتارهای خطی و پریودیک موجود در سیگنال را بررسی می?کنند، ارتباطات پیچیده?تر...
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