In recent years,China’s urban construction has been gradually influenced by Western culture and ideologies.The planning of urban development has been carried out in accordance with Western ideologies.As a result,this...In recent years,China’s urban construction has been gradually influenced by Western culture and ideologies.The planning of urban development has been carried out in accordance with Western ideologies.As a result,this has prevented our local buildings and architectures to showcase unique local style and characteristics.Even under the influence of global urbanization,the development trend has prevented the construction of global cities from displaying the characteristics of their respective cities.Therefore,it is highly important for a nation not to lose the direction in the design of the urban landscape,and not to blindly imitating the architectural style of other countries or other cities.In addition,the nation and its cities should show their respective unique cultural charm and cultural characteristics and present their best to the whole world in order to promote the popularity of the cities,expand their influence and get onto a better development path.This article mainly introduces the application of the decoration culture of the traditional Manchu residence in the architectural landscape design.展开更多
BaFeO_(3-δ)-derived perovskites are promising cathodes for intermediate temperature solid oxide fuel cells.The activity of these perovskites depends on the number of oxygen vacancies in their lattice,which can be tun...BaFeO_(3-δ)-derived perovskites are promising cathodes for intermediate temperature solid oxide fuel cells.The activity of these perovskites depends on the number of oxygen vacancies in their lattice,which can be tuned by cationic substitution.Our first-principle calculations show that Ag is a promising substitute for the Fe site,resulting in a reduced oxygen vacancy formation energy compared with the pristine BaFeO_(3-δ).Ag has limited solubility in perovskites,and its introduction generates an Ag metal secondary phase,which influences the cathode performances.In this work,we investigate the matter,using a Ba0:9La0:1Fe_(1-x)AgxO_(3-δ)series of materials as a case study.Acknowledging the limited solubility of Ag in Ba0:9La0:1Fe_(1-x)AgxO_(3-δ),we aim to distinguish the effects of Ag substitution from those of the Ag secondary phase.We observed that Ag substitution increases the number of oxygen vacancies,confirming our calculations,and facilitates the oxygen incorporation.However,Ag substitution lowers the number of holes,in this way reducing the electronic p-type conductivity.On the other hand,Ag metal positively affects the electronic conductivity and helps the redistribution of the electronic charge at the cathode-electrolyte interface.展开更多
文摘In recent years,China’s urban construction has been gradually influenced by Western culture and ideologies.The planning of urban development has been carried out in accordance with Western ideologies.As a result,this has prevented our local buildings and architectures to showcase unique local style and characteristics.Even under the influence of global urbanization,the development trend has prevented the construction of global cities from displaying the characteristics of their respective cities.Therefore,it is highly important for a nation not to lose the direction in the design of the urban landscape,and not to blindly imitating the architectural style of other countries or other cities.In addition,the nation and its cities should show their respective unique cultural charm and cultural characteristics and present their best to the whole world in order to promote the popularity of the cities,expand their influence and get onto a better development path.This article mainly introduces the application of the decoration culture of the traditional Manchu residence in the architectural landscape design.
基金The authors gratefully acknowledge the Research Grant Council of Hong Kong for support through the projects 16201820,and 16206019.
文摘BaFeO_(3-δ)-derived perovskites are promising cathodes for intermediate temperature solid oxide fuel cells.The activity of these perovskites depends on the number of oxygen vacancies in their lattice,which can be tuned by cationic substitution.Our first-principle calculations show that Ag is a promising substitute for the Fe site,resulting in a reduced oxygen vacancy formation energy compared with the pristine BaFeO_(3-δ).Ag has limited solubility in perovskites,and its introduction generates an Ag metal secondary phase,which influences the cathode performances.In this work,we investigate the matter,using a Ba0:9La0:1Fe_(1-x)AgxO_(3-δ)series of materials as a case study.Acknowledging the limited solubility of Ag in Ba0:9La0:1Fe_(1-x)AgxO_(3-δ),we aim to distinguish the effects of Ag substitution from those of the Ag secondary phase.We observed that Ag substitution increases the number of oxygen vacancies,confirming our calculations,and facilitates the oxygen incorporation.However,Ag substitution lowers the number of holes,in this way reducing the electronic p-type conductivity.On the other hand,Ag metal positively affects the electronic conductivity and helps the redistribution of the electronic charge at the cathode-electrolyte interface.
