Results 241 to 250 of about 1,041,754 (275)

Issues in Fitting Inverse Gaussian First Hitting Time Regression Models for Lifetime Data

Communications in Statistics - Simulation and Computation, 2013
Inverse Gaussian first hitting time regression models sometimes provide an attractive representation of lifetime data. Various authors comment that dependence of both parameters on the same covariate may imply multicollinearity. The frequent appearance of conflicting signs for the two coefficients of the same covariate may be related to this.
C. Caroni, Dimitris Stogiannis
semanticscholar   +4 more sources

First hitting time about solution for an uncertain fractional differential equation and application to an uncertain risk index model

Chaos, Solitons & Fractals, 2020
Abstract Uncertain fractional differential equation with memory and hereditary characteristics is a useful way to better model the uncertain dynamic system. Firstly, the solution of an uncertain fractional differential equation with the Caputo type is considered and uncertain distributions of their first hitting time is investigated.
Yuanguo Zhu, Ting Jin, Ting Jin
semanticscholar   +4 more sources

Comparing first hitting time and proportional hazards regression models

Journal of Applied Statistics, 2010
Cox's widely used semi-parametric proportional hazards (PH) regression model places restrictions on the possible shapes of the hazard function. Models based on the first hitting time (FHT) of a stochastic process are among the alternatives and have the attractive feature of being based on a model of the underlying process.
Constantine E. Anagnostopoulos, C. Caroni, Ioannis K. Toumpoulis, Dimitris Stogiannis   +3 more
semanticscholar   +4 more sources

Modelling Times Between Events with a Cured Fraction Using a First Hitting Time Regression Model with Individual Random Effects

, 2015
The empirical survival function of time-to-event data very often appears not to tend to zero. Thus there are long-term survivors, or a “cured fraction” of units which will apparently never experience the event of interest. This feature of the data can be incorporated into lifetime models in various ways, for example, by using mixture distributions to ...
C. Caroni, Polychronis Economou, Sonia Malefaki   +2 more
semanticscholar   +4 more sources

Tests for outliers in the inverse Gaussian distribution, with application to first hitting time models

Journal of Statistical Computation and Simulation, 2012
The inverse Gaussian (IG) distribution is often applied in statistical modelling, especially with lifetime data. We present tests for outlying values of the parameters (μ, λ) of this distribution when data are available from a sample of independent units and possibly with more than one event per unit. Outlier tests are constructed from likelihood ratio
C. Caroni, Dimitris Stogiannis
openaire   +3 more sources

First Hitting Time Models for Lifetime Data

, 2003
Publisher Summary The idea of a first hitting time is quite broad. For example, in industrial quality control, the run time until a quality measure first reaches an out-of-control limit is a first hitting time and a standard quantity considered in quality management.
Mei-Ling Ting Lee, George A. Whitmore
openaire   +3 more sources

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Review and implementation of cure models based on first hitting times for Wiener processes

Lifetime Data Analysis, 2009
The development of models and methods for cure rate estimation has recently burgeoned into an important subfield of survival analysis. Much of the literature focuses on the standard mixture model. Recently, process-based models have been suggested. We focus on several models based on first passage times for Wiener processes.
Jeremy Balka, Paul D. McNicholas, Anthony F. Desmond   +2 more
openaire   +4 more sources

First Hitting Time Regression Models

, 2017
Chrysseis Caroni
  +4 more sources

Optimal control problem of the uncertain second‐order circuit based on first hitting criteria

Mathematical methods in the applied sciences, 2020
First hitting criteria of a system are to initially achieve some performance indeces of the target state set. This paper primarily investigates the optimal control problem of the uncertain second‐order circuit based on first hitting criteria.
Ting Jin, Hongxuan Xia, Hao Chen
semanticscholar   +1 more source

Nearly Linear Time Algorithm for Mean Hitting Times of Random Walks on a Graph

Web Search and Data Mining, 2020
For random walks on a graph, the mean hitting time $H_j$ from a vertex i chosen from the stationary distribution to the target vertex j can be used as a measure of importance for vertex j, while the Kemeny constant K is the mean hitting time from a ...
Zuobai Zhang, Wanyue Xu, Zhongzhi Zhang
semanticscholar   +1 more source