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Flood susceptibility modelling using advanced ensemble machine learning models

Geoscience Frontiers 2021年第3期12卷 60-77页

作者： Abu Reza Md Towfiqul Islam Swapan Talukdar Susanta Mahato sonali kundu Kutub Uddin Eibek Quoc Bao Pham Alban Kuriqi Nguyen Thi Thuy Linh Department of Disaster Management Begum Rokeya UniversityRangpurBangladesh Department of Geography University of Gour BangaMaldaWest BengalIndia Environmental Quality Atmospheric Science and Climate Change Research GroupTon Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Environment and Labour Safety Ton Duc Thang UniversityHo Chi Minh CityVietnam CERIS Instituto Superior TécnicoUniversidade de LisboaLisbonPortugal Institute of Research and Development Duy Tan UniversityDanang 550000Vietnam Faculty of Environmental and Chemical Engineering Duy Tan UniversityDanang 550000Vietnam

Floods are one of nature's most destructive disasters because of the immense damage to land,buildings,and human *** is difficult to forecast the areas that are vulnerable to flash flooding due to the dynamic and complex nature of the flash ***,earlier identification of flash flood susceptible sites can be performed using advanced machine learning models for managing flood *** this study,we applied and assessed two new hybrid ensemble models,namely Dagging and Random Subspace(RS)coupled with Artificial Neural Network(ANN),Random Forest(RF),and Support Vector Machine(SVM)which are the other three state-of-the-art machine learning models for modelling flood susceptibility maps at the Teesta River basin,the northern region of *** application of these models includes twelve flood influencing factors with 413 current and former flooding points,which were transferred in a GIS *** information gain ratio,the multicollinearity diagnostics tests were employed to determine the association between the occurrences and flood influential *** the validation and the comparison of these models,for the ability to predict the statistical appraisal measures such as Freidman,Wilcoxon signed-rank,and t-paired tests and Receiver Operating Characteristic Curve(ROC)were *** value of the Area Under the Curve(AUC)of ROC was above 0.80 for all *** flood susceptibility modelling,the Dagging model performs superior,followed by RF,the ANN,the SVM,and the RS,then the several benchmark *** approach and solution-oriented outcomes outlined in this paper will assist state and local authorities as well as policy makers in reducing flood-related threats and will also assist in the implementation of effective mitigation strategies to mitigate future damage.

关键词： Flood hazard Flood vulnerability Flash floods Debris flow Teesta River basin Bangladesh

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Therapeutic efficacy of artemisinin combination therapies and prevalence of S769N mutation in PfATPase6 gene of Plasmodium falciparum in Kolkata,India

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Asian Pacific Journal of Tropical Medicine 2013年第6期6卷 443-448页

作者： Pabitra Saha Arindam Naskar Swagata Ganguly sonali Das Subhasish K Guha Asit Biswas Dilip K Bera Pratip K kundu Madhusudan Das Shrabanee Mullick Krishnangshu Ray Ardhendu K Maji Department of Microbiology Calcutta School of Tropical Medicine 108C.R.AvenueKolkata 700073India Department of Tropical Medicine Calcutta School of Tropical Medicine108C.R.AvenueKolkata 700073India Department of Microbiology Calcutta School of Tropical Medicine108C.R.AvenueKolkata 700073India Department of Health & Family Welfare Government of West BengalSwasthya BhawanSalt Lake CityKolkata-700092India Department of Zoology University of Calcutta45Ballygunge Circular RoadKolkata-700019India Department of Clinical and Experimental Pharmacology Calcutta School of Tropical Medicine108C.R.AvenueKolkata 700073India

Objective:To study the in vivo efficacy of these two ACTs in the treatment of Plasmodium falciparum {*** malaria) in Kolkata and to detennine the prevalence of mutant S769N codon of the PfATPase6 gene among field isolates of *** collected from the study area. Methods:A total of 207 *** positive cases were enrolled randomly in two study arms and followed up for 42 days as per WHO(2009) protocol.A portion of PfATPase6 gene spanning codon S769N was amplified and sequenced by direct sequencing ***:It was observed that the efficacy of bodi the ACT regimens were highly effective in the study area and no mutant S769N was detected from any ***:The used,combination AS+SP is effective and the other combination AM+I.F might be an alternative,if needed.

关键词： ACTs Plasmodium falciparum PfATPase6

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