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Science Journal of Applied Mathematics and Statistics

Archive

2024, Volume 12
1. Issue 2, Apr.
2. Issue 1, Feb.
2023, Volume 11
2022, Volume 10
2021, Volume 9
2020, Volume 8
2019, Volume 7
2018, Volume 6
2017, Volume 5
2016, Volume 4
2015, Volume 3
2014, Volume 2
2013, Volume 1

Volume 9, Issue 5, October 2021

Carleman Estimate for a Singulary Perturbed Degenerated Parabolic Equation

Zeine Sid Elemine, Ibrahima Faye, Alassane Sy, Diaraf Seck

Issue: Volume 9, Issue 5, October 2021

Pages: 113-125

Received: 23 July 2021

Accepted: 18 August 2021

Published: 29 October 2021

DOI: 10.11648/j.sjams.20210905.11

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Abstract: In this paper, we are concerned with the the internal control of an elliptic singularly perturbed degenerated parabolic equation. This parabolic equation models sand transport problem near the coast in areas subjected to the tide. We study first the null controllability result of the parabolic equation modeling sand transport equation.The limit pro... Show More

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Estimation of Finite Population Total in Presence of Missing Values in Two-Phase Sampling

Kemei Anderson Kimutai, Christopher Ouma Onyango, Mike Wafula

Issue: Volume 9, Issue 5, October 2021

Pages: 126-132

Received: 16 September 2021

Accepted: 9 November 2021

Published: 17 November 2021

DOI: 10.11648/j.sjams.20210905.12

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Abstract: Missing data is a real problem in many surveys. To overcome the problems caused by missing data, partial deletion and single imputation methods among others have been proposed. However, problems such as discarding usable data, inaccuracy in reproducing known population parameters and standard errors are associated with them. In ratio, regression an... Show More

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