Browsing Mathematics, Statistics & Physics by Title
Now showing items 434-453 of 715
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Multivariate coefficient of variation control charts in phase I of SPC
( Springer London , 2018 , Article)Multivariate control charts are mostly available for monitoring the process mean vector or the covariance matrix. Recently, work has been done on monitoring the multivariate coefficient of variation (CV) in phase II of the ... -
Multivariate control charts for monitoring process mean vector of individual observations under regularized covariance estimation
(2021 , Article)Multivariate control charts are generally used in industries for monitoring and diagnosing processes characterized by several process variables. The applications of charts assume that the in-control process parameters are ... -
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 ... -
Multivariate multilevel models for attitudes toward statistics: multi-disciplinary settings in Afghanistan
( Taylor & Francis , 2016 , Article)The present paper focuses on examining students' attitudes and perception of statistics in Afghanistan universities and the factor structure of the statistical anxiety rating scale (STARS). In total, 209 undergraduate ... -
Nanofluid in tilted cavity with partially heated walls
( Elsevier , 2014 , Article)Lattice Boltzmann Method is applied to investigate the natural convection flow utilizing nanofluids in square enclosure with partially heated walls. The fluid in the cavity is a water-based nanofluid containing different ... -
Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review.
( MDPI , 2020 , Article Review)Acetone is a well-known volatile organic compound that is widely used in different industrial and domestic areas. However, it can have dangerous effects on human life and health. Thus, the realization of sensitive and ... -
Network Analysis of MERS Coronavirus within Households, Communities, and Hospitals to Identify Most Centralized and Super-Spreading in the Arabian Peninsula, 2012 to 2016
( Hindawi Limited , 2018 , Article)Contact history is crucial during an infectious disease outbreak and vital when seeking to understand and predict the spread of infectious diseases in human populations. The transmission connectivity networks of people ... -
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. ... -
New Multiple-kink solutions and singular-kink-solutions of (2 + 1) - Dimensional coupled burgers system with time variable coefficients
( American Scientific Publishers , 2017 , Article)In this paper, we show that the (2+1)-dimensional coupled Burgers system with time variable coefficients which arise in engineering, chemistry, chemical physics, plasma physics, complex physics and phenomena gives multiple ... -
A New One-Step Iterative Process for Common Fixed Points in Banach Spaces
( Hindawi Publishing Corporation , 2008 , Article)We introduce a new one-step iterative process and use it to approximate the common fixed points of two asymptotically nonexpansive mappings through some weak and strong convergence theorems. Our process is computationally ... -
New parametric solutions of some abel equations
( University of Miskolc , 2016 , Article)New parametric solutions of some Abel equations of second kind are found. The scheme for construction of these solutions utilizes a combination of differential invariants of a symmetry of an associated second order ODE and ... -
New solitary wave and multiple soliton solutions for fifth order nonlinear evolution equation with time variable coefficients
( Elsevier B.V. , 2018 , Article)In this paper, we investigate the multiple soliton solutions and multiple singular soliton solutions of a class of the fifth order nonlinear evolution equation with variable coefficients of t using the simplified bilinear ... -
New solitary wave and multiple soliton solutions for the time-space coupled fractional mKdV system with time-dependent coefficients
( American Scientific Publishers , 2016 , Article)In this paper, a simplified bilinear method combined with a fractional transform has been used to obtain new multiple soliton solutions for the Fractional coupled modified KdV systems with variable coefficients. These ... -
New tellurite glass: Optical properties
( Elsevier , 2008 , Article)The refractive index and UV spectra of the quaternary tellurite glass system of the form 80TeO2-5TiO2-(15 - x) WO3-xAnOm where AnOm is Nb2O5, Nd2O3 and Er2O3, x = 0.01, 1, 3 and 5 mol% for Nb2O5 and x = 0.01, 0.1, 1, 3, 5 ... -
Noether symmetries and conservation laws of wave equation on static spherically symmetric spacetimes with higher symmetries
( Elsevier , 2014 , Article)In Bokhari et al. (2011), the Noether symmetries of the wave equation on a general spherically symmetric spacetime metric were provided in terms of five functions of the variables t and r subject to certain differential ... -
Noise pollution in the hospital environment of a developing country: A case study of Lahore (Pakistan)
( Taylor and Francis Inc. , 2018 , Article)The present study investigates the noise pollution levels in public- and private-sector hospitals of Lahore. The noise pollution parameters were investigated from 20 public and 10 private hospitals. We observed that the ... -
Nonexistence results for the Cauchy problem for some fractional nonlinear systems of thermo-elasticity type
( Wiley-VCH Verlag , 2016 , Article)We study the nonexistence of global solutions to the Cauchy problem for systems of parabolic-hyperbolic or hyperbolic thermo-elasticity equations posed in RN. For power nonlinearities, we present threshold critical exponents ... -
Nonparametric multivariate covariance chart for monitoring individual observations
( Elsevier , 2022 , Article)Parametric and nonparametric multivariate control charts that are proven very useful in monitoring the covariance matrix of multivariate normally or “nearly” normally distributed continuous datasets have been proposed in ... -
A Note on a Class of Generalized Parabolic Marcinkiewicz Integrals along Surfaces of Revolution
( MDPI , 2022 , Article)In this article, certain sharp Lp estimates for a specific class of generalized Marcinkiewicz operators with mixed homogeneity associated to surfaces of revolution are established. By virtue of Yano’s extrapolation ... -
A Note on Parabolic Maximal Operators along Surfaces of Revolution via Extrapolation
( MDPI , 2022 , Article)Under weak conditions on the kernels, we obtain sharp Lp bounds for rough parabolic maximal integral operators over surfaces of revolution. By virtue of these bounds along with Yano’s extrapolation argument, we confirm the ...