Rainfall-induced catastrophic landslide in Quang Tri Province: the deadliest single landslide event in Vietnam in 2020     

Van Tien  Pham  Luong  Le Hong  Duc  Do Minh  Trinh  Phan Trong  Quynh  Dinh Thi  Lan  Nguyen Chau  Thuy  Dang Thi  Phi  Nguyen Quoc  Cuong  Tran Quoc  Dang  Khang  Loi  Doan Huy 《Landslides》2021,18(6):2323-2327

  相似文献   

GIS-based landslide susceptibility modeling: A comparison between fuzzy multi-criteria and machine learning algorithms     

Sk Ajim Ali  Farhana Parvin  Jana Vojteková  Romulus Costache  Nguyen Thi Thuy Linh  Quoc Bao Pham  Matej Vojtek  Ljubomir Gigović  Ateeque Ahmad  Mohammad Ali Ghorbani 《地学前缘(英文版)》2021,12(2):857-876

Hazards and disasters have always negative impacts on the way of life.Landslide is an overwhelming natural as well as man-made disaster that causes loss of natural resources and human properties throughout theworld.The present study aimed to assess and compare the prediction efficiency of different models in landslide susceptibility in the Kysuca river basin,Slovakia.In this regard,the fuzzy decision-making trial and evaluation laboratory combining with the analytic network process(FDEMATEL-ANP),Na?ve Bayes(NB)classifier,and random forest(RF)classifier were considered.Initially,a landslide inventory map was produced with 2000 landslide and nonlandslide points by randomly dividedwith a ratio of 70%:30%for training and testing,respectively.The geospatial database for assessing the landslide susceptibility was generated with the help of 16 landslide conditioning factors by allowing for topographical,hydrological,lithological,and land cover factors.The ReliefF methodwas considered for determining the significance of selected conditioning factors and inclusion in the model building.Consequently,the landslide susceptibility maps(LSMs)were generated using the FDEMATEL-ANP,Na?ve Bayes(NB)classifier,and random forest(RF)classifier models.Finally,the area under curve(AUC)and different arithmetic evaluation were used for validating and comparing the results and models.The results revealed that random forest(RF)classifier is a promising and optimum model for landslide susceptibility in the study area with a very high value of area under curve(AUC=0.954),lower value of mean absolute error(MAE=0.1238)and root mean square error(RMSE=0.2555),and higher value of Kappa index(K=0.8435)and overall accuracy(OAC=92.2%).  相似文献   

Credibility of design rainfall estimates for drainage infrastructures: extent of disregard in Nigeria and proposed framework for practice     

Aiyelokun  Oluwatobi  Pham  Quoc Bao  Aiyelokun  Oluwafunbi  Malik  Anurag  Adarsh  S.  Mohammadi  Babak  Linh  Nguyen Thi Thuy  Zakwan  Mohammad 《Natural Hazards》2021,109(2):1557-1588

Natural Hazards - Rainfall intensity or depth estimates are vital input for hydrologic and hydraulic models used in designing drainage infrastructures. Unfortunately, these estimates are...  相似文献   

Prediction of Unconfined Compressive Strength and Flexural Strength of Cement-Stabilized Sandy Soils: A Case Study in Vietnam     

Do  Huu-Dao  Pham  Van-Ngoc  Nguyen  Hong-Hai  Huynh  Phuong-Nam  Han  Jie 《Geotechnical and Geological Engineering》2021,39(7):4947-4962

Geotechnical and Geological Engineering - Stabilization of sand by the deep mixing method increases its unconfined compressive strength (UCS) so that it can be used as a foundation for...  相似文献   

Performances of Different Machine Learning Algorithms for Predicting Saltwater Intrusion in the Vietnamese Mekong Delta Using Limited Input Data: A Study from Ham Luong River     

Tran  T. T.  Pham  N. H.  Pham  Q. B.  Pham  T. L.  Ngo  X. Q.  Nguyen  D. L.  Nguyen  P. N.  Veettil  B. K. 《Water Resources》2022,49(3):391-401

Water Resources - Accurate forecasting of salinity intrusion has a vital role in water resource management to mitigate and prevent its adverse effects. However, monitoring of salinity presents...  相似文献   

Conjugation of 4-hydroxynonenal by largemouth bass (Micropterus salmoides) glutathione S-transferases     

Pham RT  Gardner JL  Gallagher EP 《Marine environmental research》2002,54(3-5):291-295

The glutathione S-transferases (GST) are a major group of conjugative enzymes involved in the detoxification of electrophilic compounds and products of oxidative stress. We have previously described the kinetics of hepatic GST conjugation in largemouth bass using a variety of synthetic GST reference substrates. In the present study, we investigated the ability of largemouth bass hepatic GSTs to conjugate 4-hydroxynon-2-enal (4HNE), a mutagenic and cytotoxic alpha-beta-unsaturated aldehyde produced during oxidative injury. Hepatic cytosolic fractions from largemouth bass rapidly catalyzed GSH-dependent 4HNE conjugation, with the rate of GST-4HNE conjugation in bass liver exceeding those of several other mammalian and aquatic species. No apparent sex-related differences in GST-4HNE activity were observed among adult bass. SDS-PAGE and Western blotting analysis of GSH affinity-purified bass liver cytosolic GST revealed the presence of two major GST subunits of approximately 30 and 27 KDa that exhibited slight cross-reactivity when probed with a rat alpha class GST antibody, but not to rat mu, pi or theta class GST. The rapid conjugation of 4HNE by hepatic GST suggests an important role for GSTs in protecting against peroxidation of polyunsaturated fatty acids in bass liver.  相似文献   

Evaluation of a 256×256 Si:As IBC detector array for astronomy     

M. E. McKelvey  Robert E. McMurray Jr.  C. R. Mccreight  W. J. Forrest  J. D. Garnett  N. Lum  J. Asbrock  R. White  R. Kelchner  L. Lum  L. Pham 《Experimental Astronomy》1994,3(1-4):167-168

256×256-element IBC Si:As arrays have been evaluated for applications in IR astronomy from space-borne platforms. Basic figures of merit were measured at IR flux levels simulating those expected in space-based astronomical observations. Results include dark current <20e ^-/s, G as high as 3.8, / of 20%, and read noise below 100 rms e^-.  相似文献   

Long-wavelength infrared technology for astronomy at the Hughes Technology Center     

L. Pham  N. Lum  J. Asbrock  J. Venzon  R. Kelchner 《Experimental Astronomy》1994,3(1-4):227-234

The Hughes Technology Center (HTC) has developed a family of high-performance Si:As impurity-band conduction (IBC) hybrid focal plane arrays (FPAs) optimized for low background applications: 58×62 pixels (76-m pitch), 128×128 pixels (75- and 120-m pitch), and 256×256 pixels (30-m pitch). These FPAs exhibit state-of-the-art low noise (<100e ^-) achieved by using readout arrays fabricated on HTC's CryoCMOS process line. The IBC detector arrays, also fabricated at HTC, exhibit high quantum efficiency over a wide waveband with operating temperature of 4–12 K. In addition, Hughes is developing a 256×256 Si:As IBC FPA for high background applications as well as a 512×512 FPA. Readout development includes design and fabrication of 256×256 readouts with large well size of 1×10⁷ e ^- for the high-background FPA and 512×512 readouts with moderate well size (1×10⁶ e ^-).  相似文献   

Arsenic mobilisation in a new well field for drinking water production along the Red River,Nam Du,Hanoi     

Jenny Norrman  Charlotte J. Sparrenbom  Michael Berg  Dang Duc Nhan  Pham Quy Nhan  Håkan Rosqvist  Gunnar Jacks  Emma Sigvardsson  David Baric  Johanna Moreskog  Peter Harms-Ringdahl  Nguyen Van Hoan 《Applied Geochemistry》2008

  相似文献   

REDD+ politics in the media: a case from Nepal     

Dil B. Khatri  Thuy Thu Pham  Monica Di Gregorio  Rahul Karki  Naya S. Paudel  Maria Brockhaus  Ramesh Bhushal 《Climatic change》2016,138(1-2):309-323

  相似文献