African Journal of
Mathematics and Computer Science Research

  • Abbreviation: Afr. J. Math. Comput. Sci. Res.
  • Language: English
  • ISSN: 2006-9731
  • DOI: 10.5897/AJMCSR
  • Start Year: 2008
  • Published Articles: 260

Table of Content: July-December 2019; 12(2)

October 2019

An air quality composite index based on pollutant concentration factor analysis

To overcome the problems of Air Quality Index in describing regional short-term air quality status and changing trend, based on the daily average concentrations of six air pollutants affecting regional air quality in Zhengzhou from 2015 to 2018, this paper analyzes their correlation characteristics and defines an air quality composite index instead of the original index by using factor analysis method, which not only...

Author(s): Kai-guang ZHANG, Ming-ting BA, Hong-ling MENG and Yan-min SUN  

November 2019

A short note on inequalities of interval-valued intuitionistic fuzzy matrices

Inequality, also known as inequation, but unlike equation does not have rich history. After the introduction of equation, inequation captures its popularity in different fields namely algebra, geometry, trigonometry, probability, set theory, fuzzy set theory, logic, calculus etc. Whereas inequalities used in algebra are called algebraic inequalities, the ones used in geometry are called geometric inequalities etc....

Author(s): Somen Debnath  

November 2019

Total revenue function for non-regular fixed lifetime inventory system

The fixed lifetime inventory system assumes that outdated items are discarded from inventory. Such inventory system is here referred to as regular inventory system. The non-regular fixed lifetime inventory system assumes that outdated items are not discarded from inventory. The features of both the regular and non-regular inventory systems are compared in this work and the total revenue function for the non-regular...

Author(s): Izevbizua O., and Apanapudor J. S.,