نتایج جستجو برای: glarma
تعداد نتایج: 6 فیلتر نتایج به سال:
We review the theory and application of generalised linear autoregressive moving average observation driven models for time series of counts with explanatory variables and describe the estimation of these models using the glarma R-package. Diagnostic and graphical methods are also illustrated by several examples.
In this paper, we propose a novel and efficient two-stage variable selection approach for sparse GLARMA models, which are pervasive modelling discrete-valued time series. Our consists in iteratively combining the estimation of autoregressive moving average (ARMA) coefficients models with regularized methods designed performing regression Generalized Linear Models (GLM). We first establish consi...
This paper is concerned with an observation driven model for time series of counts whose conditional distribution given past observations follows a Poisson distribution. This class of models, called GLARMA, is capable of modeling a wide range of dependence structures and is readily estimated using conditional maximum likelihood. Recursive formulae for carrying out maximum likelihood estimation ...
مقدمه و اهداف: بیماری های قلبی- عروقی یکی از عمده ترین دلایل مرگ در ایران به شمار می رود، با کنترل آلودگی هوا می توان میزان بروز این بیماری های قابل پیش گیری و مرگ ناشی از آن را کاهش داد. هدف از انجام این مطالعه تعیین ارتباط بین افزایش سطح آلودگی هوا و میرایی از بیماری های قلبی و تنفسی در شهر تهران است. روش کار: میانگین غلظت روزانه پنج آلاینده ی مونواکسید کربن (carbon monoxide) ، دی اکسید نیترو...
Background and Objectives: Cardiac diseases are a major cause of death in Iran. The number of deaths from cardiac diseases can be reduced through controlling air pollution. The aim of this study was to determine the relationship between increased air pollution and mortality from respiratory and cardiac diseases in Tehran. Methods: The average daily concentrations of five pollutants, includin...
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