Browsing Mathematics, Statistics & Physics by Title

Now showing items 388-407 of 687

    • Mixed EWMA-CUSUM and mixed CUSUM-EWMA modified control charts for monitoring first order autoregressive processes 

      Osei-Aning, Richard; Abbasi, Saddam Akber; Riaz, Muhammad ( Taylor and Francis Ltd. , 2017 , Article)
      In practice most processes are known to produce autocorrelated observations. Autocorrelation degrades the performance of control charts by producing frequent false alarms when the process is stable or makes the charts ...

    • Model for oscillations in the guidance of ions through insulating nanocapillaries 

      Pokhil, G.; Merabet, H.; Stolterfoht, N. ( IOP Publishing , 2011 , Conference Paper)
      The pre-equilibrium period of the ion guiding through insulating nanocapillaries is characterized by the production of temporary charge patches inside the capillaries. The dynamics of the charge patch creation is revealed ...

    • Model predictive control of selective catalytic reduction in diesel-powered vehicles 

      Pakravesh, Hallas; Dubljevic, Stevan; Hayes, Robert E.; Forbes, J. Fraser; Aksikas, Ilyasse ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)
      This paper proposes a method to synthesize an optimal controller for the SCR section of the diesel exhaust after-treatment system, which is based on a system model consisting of coupled hyperbolic and parabolic partial ...

    • Model robust profile monitoring for the generalized linear mixed model for Phase I analysis 

      Bandara, Keerthi; Abdel-Salam, Abdel-Salam G.; Birch, Jeffrey B. ( John Wiley and Sons Ltd , 2020 , Conference Paper)
      The generalized linear mixed model (GLMM) becomes very popular in profile monitoring, especially when the production processes follow nonnormal distribution. In most of the real-life applications in industry, medicine, ...

    • Model-based optimal boundary control of selective catalytic reduction in diesel-powered vehicles 

      Aksikas A.; Aksikas I.; Hayes R.E.; Forbes J.F. ( Elsevier Ltd , 2018 , Article)
      This paper is devoted to design a model-based boundary optimal controller for selective catalytic reduction system. The mathematical model consists of coupled parabolic-hyperbolic PDEs with an ODE. The main objective is ...

    • Modeling the population-level impact of treatment on COVID-19 disease and SARS-CoV-2 transmission 

      Monia, Makhoul; Abu-Hijleh, Farah; Ayoub, Houssein H.; Seedat, Shaheen; Chemaitelly, Hiam; ... more authors ( Elsevier , 2022 , Article)
      Different COVID-19 treatment candidates are under development, and some are becoming available including two promising drugs from Merck and Pfizer. This study provides conceptual frameworks for the effects of three types ...

    • The modified homotopy perturbation method for solving strongly nonlinear oscillators 

      Momani, Shaher; Erjaee, G.H.; Alnasr, M.H. ( Elsevier , 2009 , Article)
      In this paper we propose a reliable algorithm for the solution of nonlinear oscillators. Our algorithm is based upon the homotopy perturbation method (HPM), Laplace transforms, and Padé approximants. This modified homotopy ...

    • Modified Profile Likelihood Estimation in the Lomax Distribution 

      Sewailem, Maisoun; Baklizi, Ayman ( Horizon Research Publishing , 2022 , Article)
      In this paper, we consider improving maximum likelihood inference for the scale parameter of the Lomax distribution. The improvement is based on using modifications to the maximum likelihood estimator based on the ...

    • Molybdenum oxide reinforced polyvinyl alcohol composite as high-performance dielectric material for flexible electronics 

      Parangusan, K.; Subramaniam, V.; Ganesan, A.; Venkatesh, P.S.; Ponnamma, D. ( Springer , 2023 , Article)
      Polymer dielectrics are highlighted as capable energy storing materials due to their better dielectric strength and supreme versatility compared to inorganic ceramic dielectrics in sophisticated electronics and pulsed power ...

    • Moment invariants for multi-component shapes with applications to leaf classification 

      Ben Haj Rhouma, Mohamed; Žunić, Joviša; Younis, Mohammed Chachan ( Elsevier B.V. , 2017 , Article)
      In this paper we introduce seven new invariants for multi-component shapes, and apply them to the leaf classification problem. One of the new invariants is an area based analogue of the already known boundary based anisotropy ...

    • Monitoring Coefficient of Variation Using Progressive Mean Technique 

      Abbasi S.A.; Mohamed M.A.; Ahmed M.A.; Lajara R.J.; Hadi H.F. ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)
      Control charts are mostly used for the monitoring of process mean and dispersion. In cases, when the process standard deviation is proportional to the mean, it is recommended to use control charts based on coefficient of ...

    • Monitoring multivariate coefficient of variation for high-dimensional processes 

      Adegoke, Nurudeen A.; Dawod, Abdaljbbar; Adeoti, Olatunde Adebayo; Sanusi, Ridwan A.; Abbasi, Saddam Akber ( 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 ...

    • Monitoring non-parametric profiles using adaptive EWMA control chart 

      Abbasi, Saddam Akber; Yeganeh, Ali; Shongwe, Sandile C. ( 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) ...

    • Monitoring SEIRD model parameters using MEWMA for the COVID-19 pandemic with application to the state of Qatar 

      Boone, Edward L.; Abdel-Salam, Abdel Salam G.; Sahoo, Indranil; Ghanam, Ryad; Chen, Xi; ... more authors ( Taylor and Francis Group , 2021 , Article)
      During the current COVID-19 pandemic, decision-makers are tasked with implementing and evaluating strategies for both treatment and disease prevention. In order to make effective decisions, they need to simultaneously ...

    • Morphology and property changes in PLA/PHBV blends as function of blend composition 

      Kanda G.S.; Al-Qaradawi I.; Luyt A.S. ( Springer Netherlands , 2018 , Article)
      PLA/PHBV blends were prepared by melt mixing. The morphology and physical properties of the blends and neat polymers were investigated. Scanning electron microscopy (SEM) studies provided evidence of interfacial cavities ...

    • The motion of a point vortex in multiply-connected polygonal domains 

      Kalmoun, El Mostafa; Nasser, Mohamed M.S.; Hazaa, Khalifa A. ( Multidisciplinary Digital Publishing Institute (MDPI) , 2020 , Article)
      We study the motion of a single point vortex in simply-and multiply-connected polygonal domains. In the case of multiply-connected domains, the polygonal obstacles can be viewed as the cross-sections of 3D polygonal ...

    • Mössbauer effect study of Li21+Me4+Fe63+O122−spinels 

      Saleh, H.A.; El Nimr, M.K.; Nada, N.; Fayek, M. K. ( Baltzer Science Publishers, Baarn/Kluwer Academic Publishers , 1986 , Article)
      Mossbauer effect spectra are obtained for the cubic ferrites Li2 Me Fe6 O12 (where Me4+ is one of the tetravalent elements Ge, Si and Ti) at 78K up to their magnetic transition temperatures. In a rather large temperature ...

    • Mössbauer study of ZnxNi5/3−xFe1Sb1/3O4 spinel ferrite 

      El Nimr, M.K.; Saleh, H.A.; Fayek, M. K. ( Springer Verlag , 1985 , Article)
      The antimony substituted nickel ferrite ZnxNi5/3–xFe1Sb1/3O4 with different values ofx are prepared, checked by x-ray and studied with57Fe Mössbauer spectroscopy over a wide temperature range. Characteristic spectra of ...

    • mRNA-1273 COVID-19 vaccine effectiveness against the B.1.1.7 and B.1.351 variants and severe COVID-19 disease in Qatar 

      Chemaitelly, Hiam; Yassine, Hadi M.; Benslimane, Fatiha M.; Al Khatib, Hebah A.; Tang, Patrick; ... more authors (2021 , Article)
      The SARS-CoV-2 pandemic continues to be a global health concern. The mRNA-1273 (Moderna) vaccine was reported to have an efficacy of 94.1% at preventing symptomatic COVID-19 due to infection with ‘wild-type’ variants in a ...

    • Multi-soliton solutions of the BBM equation arisen in shallow water 

      Alsayyed, O.; Jaradat, H. M.; Jaradat, M. M.M.; Mustafa, Zead ( International Scientific Research Publications , 2016 , Article)
      In this work, multiple soliton solutions and multiple singular soliton solutions are formally derived for the BBM equation. A novel transformation method combined with the Hirota's bilinear method are used to determine the ...