Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Ahmad Pourdarvish"'
Publikováno v:
Jorjani Biomedicine Journal, Vol 11, Iss 3, Pp 14-17 (2023)
Background: In medical research and survival analysis, it is common for an individual or item's failure to be attributable to multiple causes, also known as competing risks. This article focuses on examining the competing risks model as the data incr
Externí odkaz:
https://doaj.org/article/37fc0e4f089a45709b8d671be0a624eb
Publikováno v:
Austrian Journal of Statistics, Vol 51, Iss 4 (2022)
This article deals with the problem of reliability in a multicomponent stress-strength (MSS) model when both stress and strength variables are from exponentiated Teissier (ET) distributions. The reliability of the system is determined using both clas
Externí odkaz:
https://doaj.org/article/ba4bb2f091054f4f99605bdc9e03f7db
Publikováno v:
Mathematics, Vol 9, Iss 19, p 2501 (2021)
This paper presents a third order iterative method for obtaining the Moore–Penrose and Drazin inverses with a computational cost of O(n3), where n∈N. The performance of the new approach is compared with other methods discussed in the literature.
Externí odkaz:
https://doaj.org/article/445c350b97a541318f0feff26a3f8140
Nonlinear autoregressive stochastic frontier model with dynamic technical inefficiency in panel data
Autor:
Ahmad Pourdarvish, Bahareh Feizi
Publikováno v:
Communications in Statistics - Theory and Methods. 52:1058-1075
In this paper, we focused on the new stochastic frontier model with the nonlinear autoregressive structure in panel data. In classic finance models, uncorrelated errors are considered, which are fr...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f6d422e51187c53505caad1e5f98036
https://doi.org/10.1080/03610926.2021.1923746
https://doi.org/10.1080/03610926.2021.1923746
Publikováno v:
International Journal of Applied and Computational Mathematics
Analyzing the mathematical models involving Itô integral, in particular in science and engineering has received much attention, and the reason for this issue is the randomness and lack of access to the exact answer of this type of models. For this p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6c44e234f26c5df6e0cf7e7d04b891d
https://doi.org/10.1007/s40819-022-01246-z
https://doi.org/10.1007/s40819-022-01246-z
Autor:
Solmaz Norouzi, Ahmad Pourdarvish, Farshid Farzipoor, Ramazan Fallah, Seyed Morteza Shamshirgaran, Mohammad Asghari Jafarabadi
Publikováno v:
Journal of Biostatistics and Epidemiology.
Introduction: This study aimed to assess the association between the survival of patients and outcomes in Brain Stroke (BS) in the presence of competing risks utilizing a Weibull parametric model. Methods: In this longitudinal study, 332 patients wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf66daef1febd0b96ec99da94a2f0fbf
https://doi.org/10.18502/jbe.v7i3.7295
https://doi.org/10.18502/jbe.v7i3.7295
Publikováno v:
Mathematics, Vol 9, Iss 2501, p 2501 (2021)
Mathematics
Volume 9
Issue 19
Mathematics
Volume 9
Issue 19
This paper presents a third order iterative method for obtaining the Moore–Penrose and Drazin inverses with a computational cost of O(n3), where n∈N. The performance of the new approach is compared with other methods discussed in the literature.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f6ab958bd9ca5aa77ed493b423f3195
https://www.mdpi.com/2227-7390/9/19/2501
https://www.mdpi.com/2227-7390/9/19/2501
Publikováno v:
Volume: 51, Issue: 2 559-586
Hacettepe Journal of Mathematics and Statistics
Hacettepe Journal of Mathematics and Statistics
This article deals with the problem of reliability in a multicomponent stress-strength (MSS) model when both stress and strength variables are from inverse Kumaraswamy distribution. The reliability of the system is estimated using classical and Bayes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82536a8be1d6b17178498fa2e943d187
https://dergipark.org.tr/tr/pub/hujms/issue/68941/880993
https://dergipark.org.tr/tr/pub/hujms/issue/68941/880993
Autor:
Narges Zeinali, Ahmad Pourdarvish
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 591:126690
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::567ee32881624262cf4b187cd01579e1
https://doi.org/10.1016/j.physa.2021.126690
https://doi.org/10.1016/j.physa.2021.126690
Autor:
Zahra Ramezani, Ahmad Pourdarvish
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 561:125273
Recently, transfer learning is applied as an efficient and fast method for object detection and image classification. In this paper, we propose a novel structure for transfer learning based on Tsallis entropy to reduce the loss while classifying imag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b0f5af69c0da1d0b0f045626074d656
https://doi.org/10.1016/j.physa.2020.125273
https://doi.org/10.1016/j.physa.2020.125273