نتایج جستجو برای: s model
تعداد نتایج: 2701210 فیلتر نتایج به سال:
Mixed-effects models are frequently used to analyze grouped data, because they flexibly model the within-group correlation often present in this type of data. Examples of grouped data include longitudinal data, repeated measures data, multilevel data, and split-plot designs. We describe a set of S functions, classes, and methods for the analysis of linear and nonlinear mixed-effects models. The...
The development of masking schemes to secure AES implementations against side channel attacks is a topic of ongoing research. Many different approaches focus on the AES S-box and have been discussed in the previous years. Unfortunately, to our knowledge most of these countermeasures only address firstorder DPA. In this article, we discuss the theoretical background of higher order DPA. We give ...
abstract this paper discusses several commonly used models for strategic marketing¹ including market environmental analysis methods (i.e. swot and pest analysis) and strategic marketing tools and techniques (i.e. boston matrix and shell directional policy matrix)and shows how these models may help a firm to achieve its strategic goals. at first, the main reason for doing this research is de...
the augmented gravity model was employed to determine iran's trading model and agricultural export directions in the case of cross section analysis in 2005 for 64 countries which are considered as iran's main export market. besides, another explanatory variable named trade conformity index (tci) was added to the model. this index was employed to identify iran's trading model. als...
rivers and runoff have always been of interest to human beings. in order to make use of the proper water resources, human societies, industrial and agricultural centers, etc. have usually been established near rivers. as the time goes on, these societies developed, and therefore water resources were extracted more and more. consequently, conditions of water quality of the rivers experienced rap...
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...
Relative survival is a method used to estimate net survival using the expected mortality in the general population. This method is frequently used in cancer registries, more particularly with the Esteve et al. regressive proportional hazards model. Recently, extensions of this model have been developed to account for time-dependent covariate and for time-dependent hazards using B-spline functio...
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