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Application of soft computing techniques for shallow foundation reliability in geotechnical engineering

Geoscience Frontiers 2021年第1期12卷 375-383页

作者： Rahul Ray Deepak Kumar Pijush Samui Lal Bahadur Roy A.T.C.Goh Wengang Zhang Department of Civil Engineering National Institute of Technology PatnaPatnaBiharIndia School of Civil and Environmental Engineering Nanyang Technological UniversitySingapore School of Civil Engineering Chongqing UniversityChongqing400044China

This research focuses on the application of three soft computing techniques including Minimax Probability Machine Regression(MPMR),Particle Swarm Optimization based Artificial Neural Network(ANN-PSO)and Particle Swarm Optimization based Adaptive Network Fuzzy Inference System(ANFIS-PSO)to study the shallow foundation reliability based on settlement *** is a heterogeneous medium and the involvement of its attributes for geotechnical behaviour in soil-foundation system makes the prediction of settlement of shallow a complex engineering *** study explores the feasibility of soft computing techniques against the deterministic *** settlement of shallow foundation depends on the parametersγ(unit weight),e0(void ratio)and CC(compression index).These soil parameters are taken as input variables while the settlement of shallow foundation as *** assess the performance of models,different performance indices ***,VAF,R^2,Bias Factor,MAPE,LMI,U(95),RSR,NS,RPD,*** *** the analysis of results,it was found that MPMR model outperformed PSO-ANFIS and ***,MPMR can be used as a reliable soft computing technique for non-linear problems for settlement of shallow foundations on soils.

关键词： Reliability analysis MPMR ANN-PSO ANFIS-PSO Anderson-Darling test mann-whitney test

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Statistical tests of the Validation of TCO Satellite Measurements, Recorded Simultaneously by TOMS-OMI (2005) and OMI-OMPS (2012-2018)

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Atmospheric and Climate Sciences 2023年第2期13卷 159-174页

作者： Molina-Almaraz Mario Pinedo-Vega Jose Luis Ríos-Martínez Carlos Mireles-García Fernando Universidad Autónoma de Zacatecas Zacatecas México

Two statistical validation methods were used to evaluate the confidence level of the Total Column Ozone (TCO) measurements recorded by satellite systems measuring simultaneously, one using the normal distribution and another using the mann-whitney test. First, the reliability of the TCO measurements was studied hemispherically. While similar coincidences and levels of significance > 0.05 were found with the two statistical tests, an enormous variability in the levels of significance throughout the year was also exposed. Then, using the same statistical comparison methods, a latitudinal study was carried out in order to elucidate the geographical distribution that gave rise to this variability. Our study reveals that between the TOMS and OMI measurements in 2005 there was only a coincidence in 50% of the latitudes, which explained the variability. This implies that for 2005, the TOMS measurements are not completely reliable, except between the -50° and -15° latitude band in the southern hemisphere and between +15° and +50° latitude band in the northern hemisphere. In the case of OMI-OMPS, we observe that between 2011 and 2016 the measurements of both satellite systems are reasonably similar with a confidence level higher than 95%. However, in 2017 a band with a width of 20° latitude centered on the equator appeared, in which the significance levels were much less than 0.05, indicating that one of the measurement systems had begun to fail. In 2018, the fault was not only located in the equator, but was also replicated in various bands in the Southern Hemisphere. We interpret this as evidence of irreversible failure in one of the measurement systems.

关键词： TOMS-OMI and OMPS Data Global Statistical Validation Total Column Ozone mann-whitney test

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Do Chinese and American contributions in top journals have an equal citation potential?

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Chinese Journal of Library and Information Science 2015年第2期 1-10页

作者： Jielan DING Ronald ROUSSEAU National Science Library Chinese Academy of Sciences University of Chinese Academy of Sciences Information and Library Science (IBW) University of Antwerp (UA) Department of Mathematics KU Leuven Leuven B-3000 Belgium

Purpose： We want to contribute to the evaluation of Chinese research, focusing on contributions in top journals. Design/methodology/approach： Using a mann-whitney test we investigate if contributions in Nature, Science or the Proceedings of the National Academy of Sciences of the United States of America （PNAS） by Chinese or American authors only, i.e. articles for which all authors have a Chinese or an American address, have a different citation potential. Findings： There is no reason to state that Chinese and American contributions in these top journals have a different citation potential. Research limitations： Because of the small numbers involved we were not able to make a distinction between publications in Nature, Science or the Proceedings of the National Academy of Sciences of the United States of America. Practical implications： These results suggest that the better Chinese research results are of a similar level as those by American colleagues. Originality/value： It is well-known that the number of citations per publication by Chinese authors is still lagging with respect to leading scientific nations and in particular compared with the USA. We have shown that this difference does not necessarily hold in contributions in Nature, Science or the Proceedings of the National Academy of Sciences of the United States of America.

关键词： Nature Scienee Proceedings of the National Academy of Sciences of theUnited States of America Chinese articles mann-whitney test

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