Mathematics, Statistics & Physics: Recent submissions
Now showing items 281-300 of 758
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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 ... -
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 ... -
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 ... -
Green synthesis of MNO nanoparticles using abutilon indicum leaf extract for biological, photocatalytic, and adsorption activities
( MDPI AG , 2020 , Article)We report the synthesis of MnO nanoparticles (AI-MnO NAPs) using biological molecules of Abutilon indicum leaf extract. Further, they were evaluated for antibacterial and cytotoxicity activity against different pathogenic ... -
On Phase-I monitoring of process location parameter with auxiliary information-based median control charts
( MDPI AG , 2020 , Article)A control chart is often used to monitor the industrial or services processes to improve the quality of the products. Mostly, the monitoring of location parameters, both in Phase I and Phase II, is done using a mean control ... -
Novel Mixed EWMA Dual-Crosier CUSUM Mean Charts without and with Auxiliary Information
( Hindawi Limited , 2022 , Article)The classical cumulative SUM (CUSUM) chart is commonly used to monitor a particular size of the mean shift. In many real processes, it is assumed that the shift level varies within a range, and the exact level of the shift ... -
Improved Nonparametric Control Chart Based on Ranked Set Sampling with Application of Chemical Data Modelling
( Hindawi Limited , 2022 , Article)e statistical performance of parametric control charts is questionable when the underlying process does not follow any speci ed probability distribution. Nonparametric control charts are the best substitute for this ... -
A new hwma dispersion control chart with an application to wind farm data
( MDPI AG , 2020 , Article)Recently, a homogeneously weighted moving average (HWMA) chart has been suggested for the efficient detection of small shifts in the process mean. In this study, we have proposed a new one-sided HWMA chart to effectively ... -
Enhanced remediation of Cr6+ in bacterial-assisted floating wetlands
( Blackwell Publishing Ltd , 2020 , Article)Hexavalent chromium (Cr6+) is reported to have negative effects on fauna and flora. The present study establishes plant-bacterial synergism in floating wetlands (FWs) for the maximum removal of Cr6+ from the contaminated ... -
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 ... -
On designing a sequential based EWMA structure for efficient process monitoring
( Taylor and Francis Ltd. , 2020 , Article)Control chart is a popular technique that is widely used in statistical process control to identify any possible deviations from a stable state of a process. Shewhart charts are famous for identifying larger shifts, while ... -
Run Rules-Based EWMA Charts for Efficient Monitoring of Profile Parameters
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)In usual quality control methods, the quality of a process or product is evaluated by monitoring one or more quality characteristics using their corresponding distributions. However, when the quality characteristic is ... -
On designing an assorted control charting approach to monitor process dispersion: an application to hard-bake process
( Taylor and Francis Ltd. , 2020 , Article)The monitoring of process variability is an important feature to get optimal output from a process. Control charts are vital tools used for efficient process monitoring. The commonly used types of charts include Shewhart, ...
