The interlocutors:Dr. R. R. Hartman?: Director of the Language Centre and Dictionary Research Centre at University of Exeter, U. K., Secretary of the European Association for Lexicography.Chen Kai: Leturer in the Fore...The interlocutors:Dr. R. R. Hartman?: Director of the Language Centre and Dictionary Research Centre at University of Exeter, U. K., Secretary of the European Association for Lexicography.Chen Kai: Leturer in the Foreign Language Department of Fujian Teachers’ University, Hono- rary Research Assistant at Exeter University.展开更多
Rainfall and temperature variability analysis is important for researchers and policy formulators in making critical decisions on water availability and use in communities. The Western Sahel, which comprises Mali is c...Rainfall and temperature variability analysis is important for researchers and policy formulators in making critical decisions on water availability and use in communities. The Western Sahel, which comprises Mali is considered as one of the vulnerable regions to climate change, and also encountered the challenges of climatic shocks such as flood and drought. This research therefore sought to investigate climate change effects on hydrological events and trends in Sahelian rainfall intensity using Bamako (Mali) as a case study from 1991 to 2020, as limited data availability did not allow an extended period of study. Monthly observed data provided by MALI-METEO was used to validate daily rainfalls data from African Rainfall Climatology Version 2 (ARC2) satellite-based rainfall product on monthly basis. The validated model performance used Nash-Sutcliffe Efficiency (NSE) and Percent Bias (PBAIS) and gave results of 0.904 and 1.0506 respectively. Trends in annual maximum temperatures and rainfalls were analyzed using Mann-Kendall trend test. The result indicated that the trend in annual maximum rainfalls was decreasing, while annual total rainfall was increasing but not significant at 5% significance level. The rate of increase in annual total rainfalls was 0.475 mm/year according to the observed annual rainfall series and decreased to 0.68 mm/year in annual maximum. The analysis further found that annual maximum temperatures were increasing at the rate of 0.03°C/year at 5% significance level. To provide more accurate climate predictions, it is recommended that further studies on rainfall and temperature with data sets spanning 60 - 90 years be carried out.展开更多
During May 11–13,2022,the International Workshop on Efficient High-Order TimeDiscretization Methods for Partial Differential Equations(PDEs)took place at Villa Orlandiin Anacapri,Italy,a conference center of the Unive...During May 11–13,2022,the International Workshop on Efficient High-Order TimeDiscretization Methods for Partial Differential Equations(PDEs)took place at Villa Orlandiin Anacapri,Italy,a conference center of the University of Naples Federico II.Due to theCOVID-19 pandemic,the workshop was held in a hybrid format.Approximately 50 seniorresearchers,young scholars,and Ph.D.students attended this workshop.The purpose of theevent was to explore recent trends and directions in the area of time discretization for thenumerical solution of evolutionary PDEs with particular focus to high-order methods forhyperbolic systems with source terms and advection-diffusion-reaction equations,and withspecial emphasis on efficient time-stepping methods such as the implicit-explicit(IMEX),and the semi-implicit and strong stability preserving(SSP)time discretization.This focusedsection entitled“Efficient High-Order Time Discretization Methods for Partial DifferentialEquations”in Communications on Applied Mathematics and Computation(CAMC)consistsof six regularly peer-reviewed manuscripts,selected from submissions of works presentedduring the workshop.展开更多
文摘The interlocutors:Dr. R. R. Hartman?: Director of the Language Centre and Dictionary Research Centre at University of Exeter, U. K., Secretary of the European Association for Lexicography.Chen Kai: Leturer in the Foreign Language Department of Fujian Teachers’ University, Hono- rary Research Assistant at Exeter University.
文摘Rainfall and temperature variability analysis is important for researchers and policy formulators in making critical decisions on water availability and use in communities. The Western Sahel, which comprises Mali is considered as one of the vulnerable regions to climate change, and also encountered the challenges of climatic shocks such as flood and drought. This research therefore sought to investigate climate change effects on hydrological events and trends in Sahelian rainfall intensity using Bamako (Mali) as a case study from 1991 to 2020, as limited data availability did not allow an extended period of study. Monthly observed data provided by MALI-METEO was used to validate daily rainfalls data from African Rainfall Climatology Version 2 (ARC2) satellite-based rainfall product on monthly basis. The validated model performance used Nash-Sutcliffe Efficiency (NSE) and Percent Bias (PBAIS) and gave results of 0.904 and 1.0506 respectively. Trends in annual maximum temperatures and rainfalls were analyzed using Mann-Kendall trend test. The result indicated that the trend in annual maximum rainfalls was decreasing, while annual total rainfall was increasing but not significant at 5% significance level. The rate of increase in annual total rainfalls was 0.475 mm/year according to the observed annual rainfall series and decreased to 0.68 mm/year in annual maximum. The analysis further found that annual maximum temperatures were increasing at the rate of 0.03°C/year at 5% significance level. To provide more accurate climate predictions, it is recommended that further studies on rainfall and temperature with data sets spanning 60 - 90 years be carried out.
文摘During May 11–13,2022,the International Workshop on Efficient High-Order TimeDiscretization Methods for Partial Differential Equations(PDEs)took place at Villa Orlandiin Anacapri,Italy,a conference center of the University of Naples Federico II.Due to theCOVID-19 pandemic,the workshop was held in a hybrid format.Approximately 50 seniorresearchers,young scholars,and Ph.D.students attended this workshop.The purpose of theevent was to explore recent trends and directions in the area of time discretization for thenumerical solution of evolutionary PDEs with particular focus to high-order methods forhyperbolic systems with source terms and advection-diffusion-reaction equations,and withspecial emphasis on efficient time-stepping methods such as the implicit-explicit(IMEX),and the semi-implicit and strong stability preserving(SSP)time discretization.This focusedsection entitled“Efficient High-Order Time Discretization Methods for Partial DifferentialEquations”in Communications on Applied Mathematics and Computation(CAMC)consistsof six regularly peer-reviewed manuscripts,selected from submissions of works presentedduring the workshop.
