Engineering Mathematics


Volume 2, Issue 1, June 2018

  • Expected Values of Aggregation Operators on Cubic Triangular Fuzzy Number and Its Application to Multi-Criteria Decision Making Problems

    Aliya Fahmi, Saleem Abdullah, Fazli Amin, Asad Ali, Khaista Rahman

    Issue: Volume 2, Issue 1, June 2018
    Pages: 1-11
    Received: 26 December 2017
    Accepted: 16 March 2018
    Published: 31 May 2018
    Abstract: In this paper, we define triangular cubic fuzzy numbers and their operational laws. Originated on these operational laws, approximately aggregation operators, with triangular cubic fuzzy weighted arithmetic averaging operator and weighted geometric averaging operator are suggested. Expected values, score function and accuracy function of triangular... Show More
  • Assessment, Determination and Modeling Effects of Infrastructural Decay on Rental Values in Nigeria (Case Study of Ehimiri, Agbama and Isieke Housing Estates)

    Casmir Chidiebere Onyeneke, Chibuzor Eguzouwa

    Issue: Volume 2, Issue 1, June 2018
    Pages: 12-20
    Received: 31 May 2018
    Accepted: 12 June 2018
    Published: 9 July 2018
    Abstract: Housing accessibility and utilities constitute the intangible services available to a particular building by a community or any activity or groups of activities operated within the community. This research examines the effect of the decays in these infrastructures on rental values. The more accessible a dwelling is relative to other activity areas,... Show More
  • Fixed Set Point Weighting 2DOF PID Controller for Control Processes

    Bahaaeldin Gamal Abdelaty, Ahmed Hassan Ahmed, Ahmed Nasr Ouda

    Issue: Volume 2, Issue 1, June 2018
    Pages: 21-27
    Received: 4 June 2018
    Accepted: 21 June 2018
    Published: 12 July 2018
    Abstract: Nowadays, many of control systems need a flexible controller in order to achieve the operation requirement precisely and rapidly to overcome nonlinearity, uncertainty, digital implementation challenges, and achieving at the same time both of control system objectives of load disturbance rejection and set point following. This paper is aimed to desi... Show More
  • Adaptation of Surface Rejuvenation Model to Turbulent Mass Transfer with Coupling Between Thermophoretic and Coulombic Force Interactions

    Mingchi Chiou, Chinghuang Chiu

    Issue: Volume 2, Issue 1, June 2018
    Pages: 28-49
    Received: 7 June 2018
    Accepted: 27 June 2018
    Published: 24 July 2018
    Abstract: Development and applications of the surface rejuvenation model for particle transport towards the surface through turbulent boundary layer involve (1) the introduction of the constitutive equations to establish relations between the fluxes involved in mass transfer processes and the respective driving potentials, (2) the use of definition of the co... Show More
  • Process Variables Optimization in Lapping of EN8 Material Using Taguchi Method

    Rajesh Ramadass, Saravanan Sambasivam

    Issue: Volume 2, Issue 1, June 2018
    Pages: 50-55
    Received: 30 May 2018
    Accepted: 25 July 2018
    Published: 12 September 2018
    Abstract: The main aim of this work is to minimize the surface roughness in the flat lapping of EN8 material. The process variables considered for the study were lapping time, abrasive size and abrasive carrier oil proportion. The mathematical model related to the lapping such as surface finish model, stress model and its significance was understood. The (L9... Show More