Výsledky vyhledávání - "Nor Aishah Hamzah"

Generalized Cross-Validation for Simultaneous Optimization of Tuning Parameters in Ridge Regression

Autor: Mahdi Roozbeh, Nor Aishah Hamzah, Mohammad Arashi

Publikováno v: Iranian Journal of Science and Technology, Transactions A: Science. 44:473-485

When multicollinearity exists in the context of robust regression, ridge rank regression estimator can be used as an alternative to the rank estimator. Performance of the ridge rank regression estimator is highly dependent on the ridge parameter, her

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::af5d40ec8e259501654f01bb82f3f41a
https://doi.org/10.1007/s40995-020-00851-1

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Estimating Customer Lifetime Value in the Gaming Industry Using Incomplete Data

Autor: Ridda Ali, Sophie Abrahams, Anna Berryman, Collin Bleak, Nor Aishah Hamzah, Tsung Fei Khang, Poul Georg Hjorth, Choung Min Ng, Yu Tian, Jonathan A. Ward, Huining Yang

We were asked by Innovation Embassy to work with a large dataset centred around gambling investment, with the task of making a predictive function for computing Customer Lifetime Value (CLV), and also to see if there are ways of detecting fraudulent

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ee4ffc679532ffd09b594e76841a31c4
https://doi.org/10.33774/miir-2021-rd4pd

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Modelling the Effect of Vaccination Program and Inter-state Travel in the Spread of COVID-19 in Malaysia

Autor: Muhamad Hifzhudin Noor Aziz, Ahmad Dzulhilmi Ahmad Safaruddin, Nor Aishah Hamzah, Siti Suzlin Supadi, Zhou Yuhao, Muhamad Afiq Aziz

Publikováno v: Acta biotheoretica. 71(1)

A modified version of the SEIR model with the effects of vaccination and inter-state movement is proposed to simulate the spread of COVID-19 in Malaysia. A mathematical analysis of the proposed model was performed to derive the basic reproduction num

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cdeb0141a8552413807c702340c0d106
https://pubmed.ncbi.nlm.nih.gov/36394646

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Ridge regression and its applications in genetic studies

Autor: Mahdi Roozbeh, Mauro Gasparini, Nor Aishah Hamzah, Mohammad Arashi

Publikováno v: PLoS ONE, Vol 16, Iss 4, p e0245376 (2021)
PLoS ONE

With the advancement of technology, analysis of large-scale data of gene expression is feasible and has become very popular in the era of machine learning. This paper develops an improved ridge approach for the genome regression modeling. When multic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::946106b55cee76e98c3804dbfcb84373
http://hdl.handle.net/11583/2917716

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Using Improved Robust Estimators to Semiparametric Model with High Dimensional Data

Autor: Nor Aishah Hamzah, Nur Anisah Mohamed, Mahdi Roozbeh

Publikováno v: Emerging Topics in Statistics and Biostatistics ISBN: 9783030421953

In classical regression analysis, the ordinary least-squares estimation is the best estimation if the essential assumptions are satisfied. However, if the data does not satisfy some of these assumptions, then results can be misleading. Especially, ou

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9ec247190707a26d78ea7093670c2ab6
https://doi.org/10.1007/978-3-030-42196-0_11

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THE PERFORMANCE OF THE COX COEFFICIENT ESTIMATE IN THE PRESENCE OF STRONG ASSOCIATION TO SURVIVAL OUTCOME AT LOW EVENTS PER INDEPENDENT VARIABLE CONDITION

Autor: Ng Kok Haur, Nor Aishah Hamzah, Law Kian Boon

Publikováno v: JP Journal of Biostatistics. 15:21-38

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d83934fe2ba487bc0785441ca8044cf8
https://doi.org/10.17654/bs015010021

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Feasible robust estimator in restricted semiparametric regression models based on the LTS approach

Autor: Nor Aishah Hamzah, Mahdi Roozbeh

Publikováno v: Communications in Statistics - Simulation and Computation. 46:7332-7350

Under some nonstochastic linear restrictions based on either additional information or prior knowledge in a semiparametric regression model, a family of feasible generalized robust estimators for the regression parameter is proposed. The least trimme

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::95d883c36fb302a4796ebeeba70ec0d4
https://doi.org/10.1080/03610918.2016.1236954

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Fludarabine, High Dose Cytarabine and Granulocyte Colony-Stimulating Factor (FLAG) as Consolidation Chemotherapy in Older Patients with Acute Myeloid Leukemia: A Retrospective Cohort Study

Autor: Kok Haur Ng, Nor Aishah Hamzah, Kian Boon Law, Tee Chuan Ong, Kian Meng Chang

Publikováno v: Indian Journal of Hematology and Blood Transfusion. 33:483-491

The study aimed to investigate the effect of consolidation treatment with fludarabine, high-dose cytarabine and granulocyte colony-stimulating factor or FLAG in older AML patients. The study included 41 eligible patients above 54 years old, who recei

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3336e6959611da1614950b0b6f59945e
https://doi.org/10.1007/s12288-017-0790-3

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A Robust Panel Unit Root Test in the Presence of Cross Sectional Dependence

Autor: Nor Aishah Hamzah, Nurul Sima Mohamad Shariff

Publikováno v: Journal of Modern Applied Statistical Methods. 14:159-171

Problems arise in testing the stationarity of the panel in the presence of cross sectional dependence and outliers. The currently available panel unit root tests are very much affected by the presence of outliers. As such, this article introduces an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8ec1fef1906efeb10c10849de0cde137
https://doi.org/10.22237/jmasm/1446351180

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