Mathematics, Statistics & Physics: Recent submissions
Now showing items 301-320 of 758
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One-Sided and Two One-Sided Multivariate Homogeneously Weighted Moving Charts for Monitoring Process Mean
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)Multivariate memory-type control charts that use information from both the current and previous process observations have been proposed. They are designed to detect shifts in both upper and downward directions with equal ... -
Bayesian Monitoring of Linear Profiles Using DEWMA Control Structures with Random X
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Article)The process structures of manufacturing industry are efficiently modeled using linear profiles. Classical and Bayesian set-ups are two well-appreciated schemes for designing control charts for the monitoring of process ... -
An Improved Control Chart for Monitoring Linear Profiles and its Application in Thermal Conductivity
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)In most of the manufacturing processes, we encounter different quality characteristics of a product and process. These characteristics can be categorized into two kinds; study variables (variable of interest) and the ... -
Efficient control charts for monitoring process CV using auxiliary information
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)Coefficient of variation (CV) control charts are a suitable choice for the monitoring of variation in cases when the process standard deviation is proportional to the process mean. This study is aimed at enhancing the ... -
Multivariate Mixed EWMA-CUSUM Control Chart for Monitoring the Process Variance-Covariance Matrix
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)The dispersion control charts monitor the variability of a process that may increase or decrease. An increase in dispersion parameter implies deterioration in the process for an assignable cause, while a decrease in ... -
On designing efficient memory-type charts using multiple auxiliary-information
( Taylor and Francis Ltd. , 2023 , Article)This article intends to investigate new progressive mean (MEP) charts using a single auxiliary characteristic (AMEP) and two auxiliary characteristics (TAMEP) to trace small shifts in the process mean effectively. The ... -
Employing machine learning techniques in monitoring autocorrelated profiles
( Springer Science and Business Media Deutschland GmbH , 2023 , Article)In profile monitoring, it is usually assumed that the observations between or within each profile are independent of each other. However, this assumption is often violated in manufacturing practice, and it is of utmost ... -
Monitoring non-parametric profiles using adaptive EWMA control chart
( Nature Research , 2022 , Article)To monitor the quality of a process in statistical process control (SPC), considering a functional relationship between a dependent variable and one or more independent variables (which is denoted as profile monitoring) ... -
Response Surface Methodology for Optimization of Operational Parameters to Remove Ciprofloxacin from Contaminated Water in the Presence of a Bacterial Consortium
( American Chemical Society , 2022 , Article)Ciprofloxacin (CFX) is a broad-spectrum fluoroquinolone antibiotic that is widely used to treat bacterial infections in humans and other animals. However, its unwanted occurrence in any (eco)system can affect nontarget ... -
Efficient linear profile schemes for monitoring bivariate correlated processes with applications in the pharmaceutical industry
( Elsevier , 2020 , Article)The complexity of chemical processes warrants that collection of information about the processes will continue as they proceed through the various stages of industrialization. Process monitoring has emerged as an essential ... -
Phase II monitoring of linear profiles with random explanatory variable under Bayesian framework
( Elsevier , 2019 , Article)Linear profiles monitoring have been successfully implemented in many industrial applications. The design structures of control charts for profiles monitoring are mostly based on two major classifications namely Classical ... -
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 ... -
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)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)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 ... -
BNT162b2 antigen dose and SARS-CoV-2 omicron infection in adolescents
( Elsevier , 2023 , Other)COVID-19 vaccine antigen dose might affect protection against SARS-CoV-2 infection,1, 2 but direct evidence to quantify this effect is absent. We conducted a matched, retrospective, cohort study using a regression ...
