元世祖遣舟师远征日本的珍贵史料

元世祖忽必烈至元三年练习水师乘巨舟百余只‘远征扶桑三岛’于同年八月间无水师在日本壹歧对马登岛.元世祖亲自草写牒文‘派使者吐世忠、何文著’撒都鲁丁等持牒文宣谕日皇.兹将原牒文记录如下:“上天春命大蒙古国皇帝,奉告日本国王,朕维自古小国之君,境上相接,尚务讲信参睦。

FE Analysis of Longitudinal Dynamic Response of Subgrade in Bridge-Subgrade Transition of Heavy Haul Railway

With the increase of axle load and the train speed, dynamic interaction of train-track system becomes so exacerbated that the deformation and dynamic response of subgrade are more aggravated. The differential settlement will be created in bridge-embankment transition section under such dynamic action, and an adverse effect on the train operation safety can be caused. Meanwhile, differential settlement will produce additional dynamic effect when high-speed trains go through the transition between bridge-embankment. Such dynamic action will aggravate the differential settlement and subgrade damage. This paper applies the methods of field test and finite-element to systematically study the dynamic response characteristics of subgrade in bridge-embankment transition section of heavy haul railway under dynamic load for the first time. This research is focused on the analysis of influence of the different axle load, train speed, filled soil modulus, etc.. At last, the dynamic response rules are systematically summarized.

文天祥与道教

本文考察了文天祥信仰道教的几个方面的表现，认为通过他对道教的态度。