Most of Brazilian railways were built more than 100 years ago. Some of them were submitted to rebuilding processes while others were just overloaded by additional layers of ballast. Nowadays, Brazil is going through a...Most of Brazilian railways were built more than 100 years ago. Some of them were submitted to rebuilding processes while others were just overloaded by additional layers of ballast. Nowadays, Brazil is going through a new railway transport impulse in relation to the increase of load, despite of the necessary supply capacity. For this reason, there were developed evaluations from some Brazilian railways in order to determine their operational conditions. This work shows a comparative analysis of results from two parts of studied old railway, aiming to determine minimum features to enable them to accept higher load axis. One of these studied old railway parts did not have a sub-ballast layer in contrast to the other one. The strains and stresses of these old railway track parts were generated by the same locomotive.展开更多
It is to conduct the teaching exploration for the situational sports model＇s implementation in sports teaching. It is indicated that the implementation of the situational teaching is good to improve the students＇ in...It is to conduct the teaching exploration for the situational sports model＇s implementation in sports teaching. It is indicated that the implementation of the situational teaching is good to improve the students＇ initiative and interest for study; good for the students＇ participation; good to improve students＇ initiative, sports ability and sports level; good to promote students to have healthy physical and psychological development; good to optimize the teaching process and activate the class atmosphere; and also good to promote students＇ social development factor. It is an ideal teaching concept and teaching model.展开更多
This paper summarizes the encrgy consumption of rail transit and the current situation of energy saving. Then it puts forward a number of policy support measures on the technology management from several aspects, such...This paper summarizes the encrgy consumption of rail transit and the current situation of energy saving. Then it puts forward a number of policy support measures on the technology management from several aspects, such as the raft line, traction power supply, energy-saving mode and so on The related research helps urban rail transit enterprises save energy consumption, reduce costs to improve their market competitiveness, as well as to promote the enterprises to fulfill social responsibility and carry out the sustainable development idea.展开更多
文摘Most of Brazilian railways were built more than 100 years ago. Some of them were submitted to rebuilding processes while others were just overloaded by additional layers of ballast. Nowadays, Brazil is going through a new railway transport impulse in relation to the increase of load, despite of the necessary supply capacity. For this reason, there were developed evaluations from some Brazilian railways in order to determine their operational conditions. This work shows a comparative analysis of results from two parts of studied old railway, aiming to determine minimum features to enable them to accept higher load axis. One of these studied old railway parts did not have a sub-ballast layer in contrast to the other one. The strains and stresses of these old railway track parts were generated by the same locomotive.
文摘It is to conduct the teaching exploration for the situational sports model＇s implementation in sports teaching. It is indicated that the implementation of the situational teaching is good to improve the students＇ initiative and interest for study; good for the students＇ participation; good to improve students＇ initiative, sports ability and sports level; good to promote students to have healthy physical and psychological development; good to optimize the teaching process and activate the class atmosphere; and also good to promote students＇ social development factor. It is an ideal teaching concept and teaching model.
文摘This paper summarizes the encrgy consumption of rail transit and the current situation of energy saving. Then it puts forward a number of policy support measures on the technology management from several aspects, such as the raft line, traction power supply, energy-saving mode and so on The related research helps urban rail transit enterprises save energy consumption, reduce costs to improve their market competitiveness, as well as to promote the enterprises to fulfill social responsibility and carry out the sustainable development idea.
