نتایج جستجو برای: homogeneous model

تعداد نتایج: 2158364  

2004
P. Saint-Pierre JP. Daurès P. Godard

Multi-state Markov models have proven useful in many concrete situations and have had successful applications, notably in analysing disease history data. Continuous-time Markov models with three transient states are considered for the study of asthma control evolution in a cohort of 406 patients with persistent asthma. Firstly, the model is considered in the homogeneous case. Covariates are tak...

Journal: :مدیریت صنعتی 0
میثم عظیمیان دانشجوی کارشناسی ارشد دانشگاه آزاد اسلامی، واحد نجف آباد، گروه مهندسی صنایع، اصفهان، ایران آرش شاهین دانشیار، ‎گروه مدیریت دانشگاه اصفهان، ایران مهدی علینقیان استادیار، دانشکده صنایع، دانشگاه صنعتی اصفهان، ایران سیدمحمدعلی بدری استادیار، پژوهشکده علوم و فناوری زیردریا، اصفهان، ایران

an integrative approach of data envelopment analysis (dea) and malmquist productivity indicator for performance analysis of projects in subsea r&d; center (srdc) is presented. it is noticeable that, an output based model with constant efficiency was used for data analysis. furthermore, since the dea approach is merely used for homogeneous units, it was assumed that all the projects according to...

Journal: :Linear Algebra and its Applications 1978

2006
P. A. Blythe A. K. Kapila M. Short

Spatially homogeneous thermal explosions governed by a three-step chain-branching kinetic model are described in the asymptotic limit of large activation energy for a range of chain-branching cross-over temperatures. The model consists of a sequence of chain-initiation, chain-branching and chain-termination steps. Temperaturesensitive Arrhenius kinetics is employed for the initiation and branch...

Journal: :Taiwanese Journal of Mathematics 2016

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده علوم 1391

in this thesis, we consider a mathematical model of cancer with completely unknown parameters. we study the stability of critical points which are biologically admissible. then we consider a control on the system and introduce situations at which solutions are attracted to critical points and so the cancer disease has auto healing. the lyapunov stability method is used for estimating the un...

2016
Wei-Min Huang Li-Jie Zhang Xin-Jian Xu Xinchu Fu

The threshold model has been widely adopted as a classic model for studying contagion processes on social networks. We consider asymmetric individual interactions in social networks and introduce a persuasion mechanism into the threshold model. Specifically, we study a combination of adoption and persuasion in cascading processes on complex networks. It is found that with the introduction of th...

1983
I. V. Ramakrishnan Donald S. Fussell Abraham Silberschatz

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