Mathematics, Statistics & Physics: Recent submissions
Now showing items 281-300 of 738
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An ensemble neural network framework for improving the detection ability of a base control chart in non-parametric profile monitoring
( Elsevier , 2022 , Article)Profile monitoring is a challenging issue in statistical process control (SPC). It aims to use a functional relationship between a response variable and one or more explanatory variable(s) to summarize the quality of a ... -
Employing evolutionary artificial neural network in risk-adjusted monitoring of surgical performance
( Springer Science and Business Media Deutschland GmbH , 2023 , Article)Various applications of control charts in the field of health-care monitoring and surveillance can be found in the literature. As one of the major categories, monitoring binary outcomes of cardiac surgeries with the aim ... -
Enhancing the detection ability of control charts in profile monitoring by adding RBF ensemble model
( Springer Science and Business Media Deutschland GmbH , 2022 , Article)While numerous contributions and applications have been extended in profile monitoring, little attention has been paid to employing machine learning techniques in development of control charts. In this paper, a novel control ... -
Enhanced adaptive multivariate EWMA and CUSUM charts for process mean
( Taylor and Francis Ltd. , 2021 , Article)The multivariate charts are mostly used to simultaneously monitor several quality characteristics in manufacturing processes. In this study, we enhance the sensitivities of the recently proposed adaptive multivariate EWMA ... -
Contributing risk factors of common psychiatric disorders in the Pakistani population
( Springer Science and Business Media Deutschland GmbH , 2022 , Article)With an increasing incidence of psychiatric disorders worldwide, there is a need for a better understanding of the population-specific contributing risk factors that are associated with common psychiatric conditions. This ... -
New efficient exponentially weighted moving average variability charts based on auxiliary information
( John Wiley and Sons Ltd , 2020 , Article)Control chart is a well-known tool for monitoring the performance of an ongoing process. The variability of a process is an important parameter that may deteriorate the process performance if it is not taken care on time. ... -
Efficient bivariate EWMA charts for monitoring process dispersion
( John Wiley and Sons Ltd , 2020 , Article)To ensure high quality standards of a process, the application of control charts to monitor process performance has become a regular routine. Multivariate charts are a preferred choice in the presence of more than one ... -
Efficient monitoring of coefficient of variation with an application to chemical reactor process
( John Wiley and Sons Ltd , 2021 , Article)Control chart is a useful tool to monitor the performance of the industrial or production processes. Control charts are mostly adopted to detect unfavorable variations in process location (mean) and dispersion (standard ... -
An improved adaptive EWMA control chart for monitoring time between events with application in health sector
( John Wiley and Sons Ltd , 2023 , Article)Nonconforming events rarely occur in high-quality processes, and the time between events ((Formula presented.)) is likely to be followed by a skewed distribution, such as an exponential distribution. This paper proposes ... -
The use of fast initial response features on the homogeneously weighted moving average chart with estimated parameters under the effect of measurement errors
( John Wiley and Sons Ltd , 2021 , Article)Fast initial response (FIR) features are generally used to improve the sensitivity of memory-type control charts by shrinking time-varying control limits in the earlier stage of the monitoring regime. This paper incorporates ... -
A non-parametric double homogeneously weighted moving average control chart under sign statistic
( John Wiley and Sons Ltd , 2021 , Article)In practical situations, the underlying process distribution sometimes deviates from normality and their distribution is partially or completely unknown. In that instance, rather than staying with/depending on the conventional ... -
Monitoring multivariate coefficient of variation for high-dimensional processes
( John Wiley and Sons Ltd , 2022 , Article)Multivariate coefficient of variation (MCV) charts are effective tools for monitoring process relative variability. They are developed on the assumption that the process subgroup size available for monitoring the MCV ... -
Bayesian EWMA control charts based on Exponential and transformed Exponential distributions
( John Wiley and Sons Ltd , 2021 , Article)In this paper, we proposed the Bayesian exponentially weighted moving average (EWMA) control charts for mean under the nonnormal life time distributions. We used the time between events data which follow the Exponential ... -
Improved simple linear profiling method with application to chemical gas sensors
( John Wiley and Sons Ltd , 2021 , Article)In industrial applications, a functional relationship between the quality characteristics of interest is well represented by profile functions. These are often characterized by linear or nonlinear relationships that depend ... -
Auxiliary-information-based efficient variability control charts for Phase I of SPC
( John Wiley and Sons Ltd , 2020 , Article)The inclusion of correlated auxiliary variables into the monitoring scheme of quality characteristic of interest has gained notable attention in recent statistical process control (SPC) literature. Several authors have ... -
Analysis of bioconvection and oxytactic microorganisms in a porous cavity with nano-enhanced phase change materials and quadrant heater: Application of support vector regression based model
( Elsevier , 2023 , Article)In this numerical study, two-dimensional simulations are performed to obtain the bioconvection flow in a quadrant heater located porous closed space saturated with nano-enhanced phase change material (NePCM). The Galerkin ... -
Application of solar PV in the building sector: Prospects and barriers in the GCC region
( Elsevier , 2023 , Article)Solar Photovoltaic (PV) can make a significant contribution towards reducing the energy and environmental footprint of buildings. Helped by features like scalability, ease of use, and declining price, PV has become the ... -
A framework for optimizing the supply chain performance of a steel producer
(2013 , Conference Paper)Supply Chain Management (SCM) is focused on developing, optimizing, and operating efficient supply chains. Efficient supply chains are characterized by cost effective decisions, lean flow and structure, high degree of ... -
An LP model for optimizing a supply chain management system for steel company
( Newswood Limited , 2014 , Conference Paper)In this research, we have developed a linear programming formulation to describe Qatar steel manufacturing supply chain from suppliers to consumers. The purpose of the model is to provide answers regarding the optimal ... -
Long-term COVID-19 booster effectiveness by infection history and clinical vulnerability and immune imprinting: a retrospective population-based cohort study
( Elsevier , 2023 , Article)BackgroundLong-term effectiveness of COVID-19 mRNA boosters in populations with different previous infection histories and clinical vulnerability profiles is inadequately understood. We aimed to investigate the effectiveness ...
