The finite element method has been considered as one of the most significant engineering advances of the twentieth century. This computational methodology has made substantial impact on many fields in science and also...The finite element method has been considered as one of the most significant engineering advances of the twentieth century. This computational methodology has made substantial impact on many fields in science and also has profoundly changed engineering design procedures and practice. This paper, mainly froln a solid mechanics perspective, and the Swansea viewpoint in particular, describes very briefly the origin of the methodology, then summaries selected milestones of the technical developments that have taken place over the last fifty years and illustrates their application to some practical engineering problems.展开更多
There is usually source effect in the field work of controlled-source audio-frequency magnetotelluric method.Source effect is a thorny problem during field working,data processing and interpretation.Therefore,it is ve...There is usually source effect in the field work of controlled-source audio-frequency magnetotelluric method.Source effect is a thorny problem during field working,data processing and interpretation.Therefore,it is very important for the results of field prospecting to model source effect and summarize its influence rules.Based on the previous research,the authors use 3D finite difference method to simulate the electromagnetic field and set different anomaly situation to study the source effect in near-field measurement,then conclude the influence rules of source effect.Simulations provide the reference for the actual field work and data processing to correct the influence of source effect,so the information of the underground will be more approaching to the real.展开更多
The mass spectra of cluster ions (NH3)nH2=with n<4 were measured for the first time using a MPI mass spectrometer. The structures of the cluster ions NH5+ and (NH3)2H2+ were calculated using GAUSSIAN-94 package, an...The mass spectra of cluster ions (NH3)nH2=with n<4 were measured for the first time using a MPI mass spectrometer. The structures of the cluster ions NH5+ and (NH3)2H2+ were calculated using GAUSSIAN-94 package, and stable structures for both of them were found.展开更多
"Miranda Saga" is targeted as an intiation stroy. The typical general plot mode distinguishes this genre from other literary forms.Predicted on the archetypal theories, Rui Yuping summarizes the plot mode of..."Miranda Saga" is targeted as an intiation stroy. The typical general plot mode distinguishes this genre from other literary forms.Predicted on the archetypal theories, Rui Yuping summarizes the plot mode of initiation stories as follows: innocence -disillusionment -epiphany, which has been successfully applied to some classic novels, such as Mark Twain's Adventures of Huckleberry Finn and J.D.Salinger's The Catcher in the Rye, etc. Porter's "Miranda Saga" follows this general mode thus demonstrating it as a good illustration ofinitiation stories. In the first place, it extends the application and content of initiation stories. In the second place, it provides a new point of view for the study of Porter.展开更多
文摘The finite element method has been considered as one of the most significant engineering advances of the twentieth century. This computational methodology has made substantial impact on many fields in science and also has profoundly changed engineering design procedures and practice. This paper, mainly froln a solid mechanics perspective, and the Swansea viewpoint in particular, describes very briefly the origin of the methodology, then summaries selected milestones of the technical developments that have taken place over the last fifty years and illustrates their application to some practical engineering problems.
基金Supported by project of China Geological Survey(No.12120113098400)
文摘There is usually source effect in the field work of controlled-source audio-frequency magnetotelluric method.Source effect is a thorny problem during field working,data processing and interpretation.Therefore,it is very important for the results of field prospecting to model source effect and summarize its influence rules.Based on the previous research,the authors use 3D finite difference method to simulate the electromagnetic field and set different anomaly situation to study the source effect in near-field measurement,then conclude the influence rules of source effect.Simulations provide the reference for the actual field work and data processing to correct the influence of source effect,so the information of the underground will be more approaching to the real.
文摘The mass spectra of cluster ions (NH3)nH2=with n<4 were measured for the first time using a MPI mass spectrometer. The structures of the cluster ions NH5+ and (NH3)2H2+ were calculated using GAUSSIAN-94 package, and stable structures for both of them were found.
文摘"Miranda Saga" is targeted as an intiation stroy. The typical general plot mode distinguishes this genre from other literary forms.Predicted on the archetypal theories, Rui Yuping summarizes the plot mode of initiation stories as follows: innocence -disillusionment -epiphany, which has been successfully applied to some classic novels, such as Mark Twain's Adventures of Huckleberry Finn and J.D.Salinger's The Catcher in the Rye, etc. Porter's "Miranda Saga" follows this general mode thus demonstrating it as a good illustration ofinitiation stories. In the first place, it extends the application and content of initiation stories. In the second place, it provides a new point of view for the study of Porter.
