cox regression model serves as a statistical method for analyzing the survival data, which requires some options such as hazard proportionality. in recent decades, artificial neural network model has been increasingly applied to predict survival data. this research was conducted to compare cox regression and artificial neural network models in prediction of kidney transplant survival. the prese...

the data used in this research were according to survival rate records of 9700 lambs from 735 rams and 8082 ewes, which collected at moghani flock breeding research station during the year 1365 to 1390. the frequency distribution causes of culling and survival distribution function of lambs to yearling age were estimated by sas (2000). results revealed that 49.81 percent of total lambs were cul...

background : this study compared the efficacy of two commonly used fractionation schedules for palliative whole brain irradiation in patients with brain metastases, and assessed the association of the radiotherapy therapy oncology group (rtog) recursive partitioning analysis for brain metastases (rpa) to survival with each schedule. methods : patients with multiple (more than three) brain metas...

 In this paper, we discuss different estimators of the records Weibull distribution parameters and also we apply the Kullback-Leibler divergence of survival function method to estimate record Weibull parameters. Finally, these estimators have been compared using Monte Carlo simulation and suggested good estimators.

In this paper, we investigate some inferential properties of the upper record Lomax distribution. Also, we will estimate the upper record of the Lomax distribution parameters using methods, Moment (MME), Maximum Likelihood (MLE), Kullback-Leibler Divergence of the Survival function (DLS) and Baysian. Finally, we will compare these methods using the Monte Carlo simulation.

Insect defense sounds have been reported for centuries. Yet, aside from the well-studied anti-bat of tiger moths, little is understood about occurrence, function, and evolution these sounds. We define a sound as an acoustic signal (air- or solid-borne vibration) produced in response to attack threat by predator parasitoid that promotes survival. Defense described 12 insect orders, across differ...