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hazard function model

См. также в других словарях:

  • Hazard ratio — The hazard ratio in survival analysis is the effect of an explanatory variable on the hazard or risk of an event. For a less technical definition than is provided here, consider hazard ratio to be an estimate of relative risk and see the… …   Wikipedia

  • Accelerated failure time model — In the statistical area of survival analysis, an accelerated failure time model (AFT model) is a parametric model that provides an alternative to the commonly used proportional hazards models. Whereas a proportional hazards model assumes that the …   Wikipedia

  • Semiparametric model — In statistics a semiparametric model is a model that has parametric and nonparametric components.A model is a collection of distributions: {P heta: heta in Theta} indexed by a parameter heta. * A parametric model is one in which the indexing… …   Wikipedia

  • Swiss Cheese model — The Swiss Cheese model of accident causation is a model used in the risk analysis and risk management of human systems. It likens human systems to multiple slices of Swiss cheese, stacked together, side by side. It was originally propounded by… …   Wikipedia

  • U.S. Chemical Safety and Hazard Investigation Board — Chemical Safety and Hazard Investigation Board Seal …   Wikipedia

  • Chemical Safety and Hazard Investigation Board — The Chemical Safety and Hazard Investigation Board (or CSB) is an independent agency of the United States Government charged with investigating industrial chemical accidents. Headquartered in Washington, D.C., the agency s board members are… …   Wikipedia

  • Proportional hazards models — are a class of survival models in statistics. Survival models relate the time that passes before some event occurs to one or more covariates that may be associated with that quantity. In a proportional hazards model, the unique effect of a unit… …   Wikipedia

  • Survival analysis — is a branch of statistics which deals with death in biological organisms and failure in mechanical systems. This topic is called reliability theory or reliability analysis in engineering, and duration analysis or duration modeling in economics or …   Wikipedia

  • Predictive analytics — encompasses a variety of techniques from statistics and data mining that analyze current and historical data to make predictions about future events. Such predictions rarely take the form of absolute statements, and are more likely to be… …   Wikipedia

  • Failure rate — is the frequency with which an engineered system or component fails, expressed for example in failures per hour. It is often denoted by the Greek letter λ (lambda) and is important in reliability engineering. The failure rate of a system usually… …   Wikipedia

  • Log-logistic distribution — Probability distribution name =Log logistic type =density pdf cdf parameters =alpha>0 scale eta> 0 shape support =xin [0,infty) pdf = frac{ (eta/alpha)(x/alpha)^{eta 1} } { left [ 1+(x/alpha)^{eta} ight] ^2 } cdf ={ 1 over 1+(x/alpha)^{ eta} …   Wikipedia

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