نتایج جستجو برای: survival model
تعداد نتایج: 2389577 فیلتر نتایج به سال:
Background and purpose: Imbalance between low oxygen supply and oxygen demands determines organ hypoxia causing oxidative stress and finally lead to cell death. Compounds with antioxidant activity are able to exhibit antihypoxic property. Allium sativum has distinctive antioxidant activities, but to the best of our knowledge, there is no reports on the protective effect of flower of this plant ...
Background and purpose: Hypoxia occurs in ischemia and heart attack, and leads to death. It involves production of reactive oxygen species. Antioxidants exhibit antihypoxic properties. Ferula persica has distinctive antioxidant activities. Nothing is known about the protective effect of this plant against hypoxia-induced lethality in mice. Materials and methods: Protective effects of methanol...
Introduction & Objective: Gastric cancer is the forth common cancer and second cause of death. Surgery is the primary treatment of gastric cancer and chemotherapy and radiotherapy is used as supplementary treatments. The aim of this study is estimation of survival and affected fac-tor in the patients with gastric cancer after surgery in Hamadan province. Materials & Methods: All patients with p...
In this study a bio-economic model was used for a flock with 195 breeding ewes and 20 rams to determine economic values of important traits in Zel sheep of Golestan including litter size, pre-weaning survival, post-weaning survival, ewe survival, birth weight, weaning weight, yearling weight, ewe mature weight, dressing percentage, conception rate and wool weight. In this model, fixed environme...
Background and objectives: Application of statistical machine learning methods such as ensemble based approaches in survival analysis has been received considerable interest over the past decades in time-to-event data sets. One of these practical methods is survival forests which have been developed in a variety of contexts due to their high precision, non-parametric and non-linear nature. This...
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...
Background: Any accident is a disturbance in the balance between the human system, vehicle, road and environment. Future prediction of traumatic accidents is a valuable factor for managers to make strategic decisions in the areas of safety, health and transportation. Materials and Methods: In this study, by using Grey Model (GM) (1.1), Rolling Grey Model (RGM), Fourier Grey Model (FGM) (1.1), ...
In this paper we provide some sharp asymptotic results for a stochastic model of species survival recently proposed by Guiol, Machado, and Schinazi.
patients and methods we investigated the timing and frequency of acute rejection episodes related to long-term patient-graft survival in taleghani hospital between 1990 and 2011. recipients were divided into three groups as group-1 (no rejection), group-2 (early acute rejection [ear]: less than 3-months) and group-3 (late acute rejection [lar]: after 3 months of transplant). conclusions lar had...
Introduction: To investigate 28 days survival rate following first acute myocardial infarction (AMI) associated with the presence of classical risk factors and treatment modalities in Gorgan, north of Iran. Materials and methods: Our cohort including all patients hospitalized due to AMI from 2010 to 2013. Data were collected on demographic, prophylactic drugs and classical coronary risk fa...
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