Synchronization is a ubiquitous feature in many natural systems and nonlinear science. This paper studies the synchronization complete network consisting of n nodes. Each node connected to all other nodes by coupling represented an ordinary differential system FitzHugh-Nagumo type (FHN) which can be obtained simplifying famous Hodgkin-Huxley model. From this network, sufficient condition on str...

در این تحقیق به مقایسه تحلیلی و عددی آبشار جریان برگشتی مدل R با آبشارهای Q QI سیستم‌­های چندجزیی پایدار پرداخته می‌­شود. راستا برای اولین بار کدهای جهت طراحی منظور کد نرم‌افزار متلب نوشته شده‌­اند. نتایج نشان می‌­دهد که دو جزء 1k 2k از خوراک Nc جزء، تعداد معدودی قابل تعریف است همگی حالات خاصی می­‌باشد. هم‌­چنین یافته‌­ها مجموع مقدار برش جزیی همیشه برابر یک است. طریق داده می‌­شود صورتی میانگین ...

Classification of speech data from male volunteers (normal) and patients recovering from cancer of the larynx (abnormal) is discussed. Analysis of normals and abnormals has shown that there is a significant distinction in the fundamental frequency and harmonic envelope between these groups during constant phonation of vowel sounds. This work proposes a method of deriving the Fundamental-Harmoni...

A FitzHugh–Nagumo (FHN) model with delayed coupling is considered to investigate the steady state bifurcation due to the coupling strength and delay. The center manifold reduction and normal form method are employed to study the bifurcation from zero singularity. We show that the coupling strength can induce both the pitchfork and transcritical bifurcations and the coupled delay has the most in...

We study the dynamics of two neuronal populations weakly and mutually coupled in a multiplexed ring configuration. simulate activity with stochastic FitzHugh-Nagumo (FHN) model. The perceive different levels noise: one population exhibits spiking induced by supra-threshold noise (layer 1), while other is silent absence inter-layer coupling because its own level sub-threshold 2). find that, for ...

با توجه به رشد بالای جمعیت در جهان و نیاز اطمینان از امنیت غذایی، افزایش تولید واحد سطح محصولات زراعی به‌منزلة راهبردی اساسی حل مسئلة تأمین غذا به‌شمار می‌رود. سوی دیگر، وجود محدودیت زیرکشت پایین‌بودن میانگین عملکرد برخی کشاورزی مانند گندم کشور، محصول می‌تواند راهکاری عملی پاسخ کشور محسوب شود. یکی مهم‌ترین بیماری‌های فوزاریوم است که، نقش پیش‌بینی این بیماری جلوگیری کاهش بهره‌وری محصول، مدل‌هایی...

BACKGROUND The low level of response (LR) to alcohol is a genetically influenced characteristic related to the development of alcohol use disorders (AUDs). This phenotype is found in men with a family history (FH) of alcoholism, predicts future AUDs, and has heritabilities as high as 60%. However, despite evidence of genetic influences for AUDs in both sexes, the majority of studies evaluating ...

ing • Adopted COAʼs have poorer ability (Ref. 1) and Planning • Alcoholic COAʼs (vs. FHN alcoholics) have poorer ability (Refs. 1,3,4) • Generally, COA-FHN differences are relatively small but are present (Refs. 2–4) 1The findings are presented for COAʼs compared with family history-negative subjects except where indicated. SOURCES: References (1) Tarter et al. 1990; (2) Sher 1991; (3) Pihl et ...

Whether using quantified tests to assess physical capabilities, or via validated questionnaires, physical function is notably reduced in chronic hemodialysis patients (1). Physical function is a major component of quality-of-life assessment in this population (2) and is best defined as an individual’s ability to perform activities in their daily lives (ADLs) (3). Notably, both poor physical per...