نتایج جستجو برای: parametric model
تعداد نتایج: 2144912 فیلتر نتایج به سال:
normal 0 false false false en-us x-none fa microsoftinternetexplorer4 aim : for the purpose of cost modeling, the semi-parametric single-index two-part model was utilized in the paper. furthermore, as functional gastrointestinal diseases which are well-known as common causes of illness among the society people in terms of both the number of patients and prevalence in a specific time interval, t...
In recent years a popular non-parametric model for coarsened data is an assumption on the coarsening mechanism called Coarsening At Random (CAR). We will give a short definition here; in the talk we will introduce a more general version. Let Y be the space of the parameter of interest Y . On Y we have a dominating measure Q0. Let C be a space with a dominating measure P0 such that the data cont...
When are political institutions stable? When do they tend toward reform? This paper examines a model of dynamic, endogenous institutional change. I introduce a class of dynamic political games in which the political aggregation rules used at date t+1 are instrumental choices under rules at date t. A political rule is stable if it selects itself. A reform occurs when an alternative rule is selec...
The theory of belief functions assesses evidence by fitting it to a scale of canonical examples in which the meaning of a message depends on chance. In order to analyse parametric statistical problems within the framework of this theory, we must specify the evidence on which the parametric model is based. This article gives several examples to show how the nature of this evidence affects the an...
We propose a simple stochastic model for an author’s production/citation process in order to investigate the recently proposed hindex for measuring an author’s research output and its impact. The parametric model distinguishes between an author’s publication process and the subsequent citation processes of the published papers. This allows us to investigate different scenarios such as varying t...
This paper deals with the identification of treatment effects when the outcome variable is ordered. If outcomes are measured ordinally, previously developed methods to investigate the impact of an endogenous binary regressor on average outcomes cannot be applied as the expectation of an ordered variable, in its strict sense, does not exist, and a shift in focus to distributional effects is indi...
Sharp non-parametric bounds on the winner’s curse effects (the difference between the mean value and the mean value conditional on winning) are derived for sealed-bid auctions with affiliated values. Both firstand second-price formats are considered. In addition, sharp bounds are derived on the competitive effect, the difference between the mean value conditional on winning and the mean bid. Al...
The identification of human basic actions plays an important role for recognizing human activities in complex scene. In this paper we propose an approach for automatic human action recognition. The parametric model of human is extracted from image sequences using motion/texture based human detection and tracking. Action features from its model are carefully defined into the action interaction r...
با توجه به کاربرد روز افزون توابع گویا (rational functions) در تصویرسنجی (فتوگرامتری) این معادلات مورد توجه محققان زیادی است. یکی از معایب این معادلات، ناپایداری مدل در برآورد پارامترها یا همان ضرایب است. در واقع مسئله برآورد ضرایب توابع گویا rfcs) rational function coefficients,) با استفاده از نقاط کنترل موجود در اغلب موارد یک مسئله ای بدطرح (ill-posed) است که باید روشی را برای پایدارسازی (reg...
adsorption isotherm modeling of phenol onto natural soils – applicability of various isotherm models
liquid-phases adsorption equilibrium of phenol onto two naturally available soils namely kalathur soil (kr) and adhanur soil (ar) were studied. the experimental data were analyzed using fourteen isotherm models, ranging from single-parametric model to multi-parametric models (up to 5 parameters) of the system. results show that in general the accuracy of models to fit experimental data improves...
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