A multilevel genetic algorithm (MLGA) is proposed in this paper for solving the kind of optimization problems which are multilevel structures in nature and have features of mixed-discrete design variables, multi-modal and ...
The Average Run Length (ARL) is a performance measure that is frequently used in control charts. Cumulative Sum (CUSUM) is a popular procedure in quality control as it is a sensitive detector of small shifts in values of ...
Many authors in recent years have proposed extensions of familiar survival analysis methodologies to apply in dependent data settings, for example, when data are clustered or subject to repeated measures. However, these ...
Goetghebeur, E; Ryan, LM(Oxford University Press, 1995-01)
We propose a method to analyse competing risks survival data when failure types are missing for some individuals. Our approach is based on a standard proportional hazards structure for each of the failure types, and involves ...
Community intervention trials are becoming increasingly popular as a tool for evaluating the effectiveness of health education and intervention strategies. Typically, units such as households, schools, towns, counties, are ...
Assuminga smooth trendp lus independente rrorm odel fort he environmentael ffects in the yields of a fieldp lot experiment,le ast squares smoothingm ethodsa re developed to estimate both the treatmente ffectsa nd the unknown ...
The number of in vitro fertilization (IVF) cycles in the United States increased from fewer than 46,000 in 1995 to more than 120,000 in 2005. IVF and other assisted reproductive technology (ART) data are routinely collected ...
Women tend to repeat reproductive outcomes, with past history of an adverse outcome being associated with an approximate two-fold increase in subsequent risk. These observations support the need for statistical designs and ...
Suriyakat, W; Areepong, Y; Sukparungsee, S; Mititelu, G(International Association of Engineers, 2012-01)
The Exponentially Weighted Moving Average (EWMA) procedure are used for monitoring and detecting small shifts in the process mean which performs quicker than the Shewhart control chart. Usually, the common assumption of ...
Zhang, J; Zhang, N; Crowther, AR(Kinokuniya Co Ltd, 2011-01)
Brake groan is a friction-induced vibration occurring on the contact surface between rotor and brake in a vehicle. In this paper, a two degree-of-freedom rotor and brake model driven by a displacement input is adopted to ...
We consider the fate of output in the Cournot oligopoly model when the equilibrium is locally unstable. We discuss types of nonlinearities which may be present to bound the motion and introduce time lags in production and ...
In this study, the two-machine bicriteria flowshop scheduling problem is addressed. The objective is to minimize a weighted sum of total flowtime and makespan. Different branch-and-bound algorithms have already appeared ...
Novikov, A; Christensen, S; Irle, A(Taylor and Francis, 2011-01)
Optimal stopping problems form a class of stochastic optimization problems that has a wide range of applications in sequential statistics and mathematical finance. Here we consider a general optimal stopping problem with ...
Elashoff, M; Ryan, LM(American Statistical Association, 2004-01)
This article presents an algorithm for accommodating missing data in situations where a natural set of estimating equations exists for the complete data setting. The complete data estimating equations can correspond to the ...
The analysis of data arising from environmental health studies which collect a large number of measures of exposure can benefit from using latent variable models to summarize exposure information. However, difficulties ...
Yeh, W; Ho, H; Chen, Y; Yeh, Y(I C I C International, 2012-01)
Evaluating network reliability is an important topic in the planning, designing and control of network systems. Modications are common for network expansion or reinforcement evaluation and planning. A modied network is an ...
We consider in this article the arbitrage free pricing of double knock-out barrier options with payoffs that are arbitrary functions of the underlying asset, where we allow exponentially time-varying barrier levels in an ...
Many business decision problems involve multiple objectives and can thus be described by multiple objective linear programming (MOLP) models. When a MOLP problem is being formulated, the parameters of objective functions ...
In this study, a special situation involving a computationally di$cult #owshop scheduling problem is discussed. The objective of this problem is to minimize a weighted combination of job #owtime and schedule makespan. An ...