By means of SNHT,cumulative-departure and rank test,the homogeneity test of annual mean temperature series from 48 stations in Liaoning Province from 1961 to 2008 was carried out,and the reasons for heterogencity form...By means of SNHT,cumulative-departure and rank test,the homogeneity test of annual mean temperature series from 48 stations in Liaoning Province from 1961 to 2008 was carried out,and the reasons for heterogencity formation were analyzed combining with the historical evolution data of these stations.The results showed that all of the three methods were valid for the heterogencity test of temperature series,and there was certain complement between rank test and SNHT test.Station relocation was the main reason for temperature heterogencity,and heterogencity breakpoint mainly appeared in 1970s.展开更多
Moire interferometry method is introduced to study the feasibilities of J integral as a plastic singularity parameter at the tip of the notch in the welded joints. The results show that J dominance in most studied cas...Moire interferometry method is introduced to study the feasibilities of J integral as a plastic singularity parameter at the tip of the notch in the welded joints. The results show that J dominance in most studied cases is not validated in v and u displacement fields. Therefore, it can be concluded that J-integral as controlling parameter used to estimate the safety of welded structures is not always valid.展开更多
Evolutionary game theory has extensively investigated situations in which several gamesare competing against each other at the same time,but the model only assumes sym-metric interactions in homogeneous environments.N...Evolutionary game theory has extensively investigated situations in which several gamesare competing against each other at the same time,but the model only assumes sym-metric interactions in homogeneous environments.Now,the population is consideredin heterogeneous environments,individuals in the population occupy a different qualityof patches,and individual fitness depends not only on the interaction between individ-uals,but also on the quality of the environment.Here,by establishing a mathemati-cal framework,we analyze the natural selection between two strategies and two gamesin heterogeneous environments.Furthermore,we analyze the natural selection of Pris-oner's Dilemma and Hawk-Dove games theoretically to demonstrate the dynamics ofcooperators and defectors in their choice of environment and their respective games.Asexpected,the distribution of games and strategies changes with time.Based on differentinitial population compositions,we also discuss the invasion problem of games from dif-ferent perspectives.To one's surprise,we can find that good quality patches attract allindividuals;the long-term dynamics in invariant rich environments is the same as thedynamics of symmetric interactions in homogeneous environments.展开更多
文摘By means of SNHT,cumulative-departure and rank test,the homogeneity test of annual mean temperature series from 48 stations in Liaoning Province from 1961 to 2008 was carried out,and the reasons for heterogencity formation were analyzed combining with the historical evolution data of these stations.The results showed that all of the three methods were valid for the heterogencity test of temperature series,and there was certain complement between rank test and SNHT test.Station relocation was the main reason for temperature heterogencity,and heterogencity breakpoint mainly appeared in 1970s.
文摘Moire interferometry method is introduced to study the feasibilities of J integral as a plastic singularity parameter at the tip of the notch in the welded joints. The results show that J dominance in most studied cases is not validated in v and u displacement fields. Therefore, it can be concluded that J-integral as controlling parameter used to estimate the safety of welded structures is not always valid.
基金This work was supported by the Research Fund for the Taishan Scholar Project of Shandong Province of China and Shandong Provincial Natural Science Foundationof China(No.ZR2019MAO03).
文摘Evolutionary game theory has extensively investigated situations in which several gamesare competing against each other at the same time,but the model only assumes sym-metric interactions in homogeneous environments.Now,the population is consideredin heterogeneous environments,individuals in the population occupy a different qualityof patches,and individual fitness depends not only on the interaction between individ-uals,but also on the quality of the environment.Here,by establishing a mathemati-cal framework,we analyze the natural selection between two strategies and two gamesin heterogeneous environments.Furthermore,we analyze the natural selection of Pris-oner's Dilemma and Hawk-Dove games theoretically to demonstrate the dynamics ofcooperators and defectors in their choice of environment and their respective games.Asexpected,the distribution of games and strategies changes with time.Based on differentinitial population compositions,we also discuss the invasion problem of games from dif-ferent perspectives.To one's surprise,we can find that good quality patches attract allindividuals;the long-term dynamics in invariant rich environments is the same as thedynamics of symmetric interactions in homogeneous environments.
