The Effect of Activation Functions in a Chest X-ray Image Classification

Autor: Charles Chinedu Nworu, Emmanuel John Ekpenyong‬, Chisimkwuo John, Christian Nduka Onyeukwu

The choice of activation functons is very important in deep learning. This is because activation functions are capable of capturing non-linear patterns in a data. The most popular actiavtion function is the Rectified Linear Unit (ReLU) but it suffers

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::90413f04333b9f988f960dedde7c7549
https://doi.org/10.21203/rs.3.rs-2064395/v1

Imputation of Missing Values in Economic and Financial Time Series Data Using Five Principal Component Analysis (PCA) Approaches

Autor: Charles C. Nworu, Emmanuel John Ekpenyong, Chisimkwuo John

Publikováno v: Central Bank of Nigeria Journal of Applied Statistics. :51-73

This study assessed five approaches for imputing missing values. The evaluated methods include Singular Value Decomposition Imputation (svdPCA), Bayesian imputation (bPCA), Probabilistic imputation (pPCA), Non-Linear Iterative Partial Least squares i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83043fc13221124263e084400b114982
https://doi.org/10.33429/cjas.10119.3/6

A Modified Replacement Model for Items That Fail Suddenly with Variable Replacement Costs

Autor: Samuel Ugochukwu Enogwe, Ben Ifeanyichukwu Oruh, Emmanuel John Ekpenyong

Publikováno v: American Journal of Operations Research. :457-473

Several researches have been done to provide better alternative to the existing replacement models, but the research works did not adequately address the replacement problem for items that fail suddenly. Hence, a modified replacement model for items

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e31c2b33c1495c59c36c883442f508fd
https://doi.org/10.4236/ajor.2018.86026

ANALYSIS OF MULTI-SERVER SINGLE QUEUE

Autor: Emmanuel John Ekpenyong, Nse S. Udoh

Publikováno v: Pakistan Journal of Statistics and Operation Research, Vol 7, Iss 2, Pp 183-198 (2011)
Pakistan Journal of Statistics and Operation Research; Vol 7. No. 2, July 2011; 183-198

Queuing properties such as expected total service time and its variance and some performance measures like the expected number of phases in the system, expected number of phases in the queue, expected number of customers in the queue, expected waitin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9b97aabd0f41fd95e9d7947300bf666
http://www.pjsor.com/index.php/pjsor/article/view/132

A modified class of exponential-type estimator of population-mean in simple random sampling

Autor: Joy Uket, Emmanuel John Ekpenyong, E. I. Enang

Publikováno v: International Journal of Advanced Statistics and Probability. 5:70

The problem of obtaining better ratio estimators of the population means are dominating in survey sampling. This paper provides a modified class of exponential type estimators using combinations of some existing estimators. Expressions for the bias a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fb3db52060f6f48792840003e9d48b41
https://doi.org/10.14419/ijasp.v5i2.7345