نتایج جستجو برای: مدل fhn
تعداد نتایج: 120144 فیلتر نتایج به سال:
Epidemiological research has clearly demonstrated the importance of a family history as a determinant of future alcohol and, possibly, drug use in offspring of alcoholics. Laboratory studies have examined a wide range of potential markers both in the presence and absence of alcohol challenge, which may predict those subjects at high risk for the future development of alcoholism. While this body...
Recently, the influence of thermal processes on electrophysiology has clearly been underlined by Bini et al. [2], using a FitzHugh–Nagumo-type (FHN-type) model. When the temperature is raised, the action potential duration (APD) has been shown to shorten, while the action potential (AP) amplitude decreases, and the conduction velocity increases [2]. In the present study, we investigate the effe...
ON THE DYNAMICS OF SOME DIFFEOMORPHISMS OF d NEAR PARABOLIC FIXED POINTS DAN COMAN AND MARIUS DABIJA
In this paper we consider diffeomorphisms of C? of the special form F(z, W) = (w, --z + ~G(w)). For such maps the origin is a parabolic fixed point. Under certain hypotheses on G we prove the existence of a domain R c @ with 0 E aR and of invariant complex cnrves 20 = f(t) and zv = g(z), z E R, for F-l and F, such that Fhn(z,f(z)) t 0 and F”(z,g(z)) + 0 as n + co.
BACKGROUND An increase in left ventricular mass (LVM) is associated with mortality and cardiovascular morbidity in patients with end-stage renal disease. METHODS AND RESULTS The Frequent Hemodialysis Network (FHN) Daily Trial randomized 245 patients to 12 months of 6 times per week daily in-center hemodialysis or conventional hemodialysis; the FHN Nocturnal Trial randomized 87 patients to 12 ...
مدل سازی و حل مساله مسیریابی وسایل نقلیه (VRP) در بخش توزیع زنجیره تامین با درنظر گرفتن محدودیت تردد
شرایط افروزش و اشتعال سوختهای گداخت هستهای در حضور ناخالصها، یکی از موارد مهمی است که طراحی قرصهای سوخت باید مورد توجه قرار گیرد. این مقاله اثر ناخالصی هسته سنگین طلا بر کلیه فرایندهای احتراق پلاسمای غیرتعادلی دوتریم- تریتیم مدل چهار دمایی آن شکل تابع توزیع انرژی رفتار فوتونها تأثیر میگذارد بررسی گرفته است. مطالعه شامل اثرات منفی سوخت، طول زمان تشکیل لکه داغ نتایج محاسبات عددی به دست آم...
In this study, an adaptive Neural Network (NN) based backstepping controller is proposed to realize chaos synchronization of two gap junction coupled FitzHugh-Nagumo (FHN) neurons with uncertain time delays. In the designed backstepping controller, a simple Radial Basis Function (RBF) NN is used to approximate the uncertain nonlinear part of the error dynamical system. The weights of the NN are...
Electrophysiology of the heart is the subject of a vast interdisciplinary literature, from medical sciences through bio-engineering, physiology, chemistry and physics. The difficulty in having access to direct measures on real patients entailed the coupling of such studies with numerical simulations. Several works have been done on this topic, focusing mainly on the behavior of the ventricles. ...
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