Based on the analysis of the urban landscape and its composition,main problems of urban landscape at the early stage of urbanization were summarized,including more attention to the technical content of urban landscape...Based on the analysis of the urban landscape and its composition,main problems of urban landscape at the early stage of urbanization were summarized,including more attention to the technical content of urban landscape,valuing transformation but belittling protection,emphasizing uniformity,ignoring the diversity,lack of scientific planning,and neglecting the value orientation. It is expected that the construction of urban landscape may return to its aesthetic value,practical value,ecological value and other aspects of value orientation. It is believed that the urban landscape is both a type of perception and experience. It can not only maintain the cultural heritage and the evolution of civilization,but also maintain the integration of the biological and physical environment,play the role of diversification in the urban public open space,and undertake social functions such as ecological,disaster prevention,waterlogging,and water conservancy at the same time of protecting and lighting the environment.展开更多
With the gradual improvement of living standard, the public demands on landscaping have focused more on quality than on quantity, and plant furnishing has grown from singular green plants to colored-leaf plants with m...With the gradual improvement of living standard, the public demands on landscaping have focused more on quality than on quantity, and plant furnishing has grown from singular green plants to colored-leaf plants with multiple layers. Confi guration of colored-leaf plants follows certain principles and patterns to enrich the beauty of plant landscaping, construct colorful urban green spaces, satisfy increasing application and aesthetic needs of the public, and reflect value of plant landscaping.展开更多
同带泵浦是目前实现高功率光纤激光器的主要技术之一。报道了一种自主研制的同带泵浦掺镱双包层光纤,采用改进的化学气相沉积工艺结合液相掺杂工艺,通过纤芯组分设计和制棒工艺优化,提高了高掺杂光纤纤芯折射率的均匀性。基于所研制的47...同带泵浦是目前实现高功率光纤激光器的主要技术之一。报道了一种自主研制的同带泵浦掺镱双包层光纤,采用改进的化学气相沉积工艺结合液相掺杂工艺,通过纤芯组分设计和制棒工艺优化,提高了高掺杂光纤纤芯折射率的均匀性。基于所研制的47μm/400μm光纤搭建了全光纤化主振荡功率放大器,采用同带泵浦方式,实现了高受激拉曼散射(SRS)抑制比的20.88 k W激光输出,中心波长为1080 nm,斜率效率为82.7%。这是目前国产光纤以同带泵浦方式实现的最高功率。展开更多
基金Sponsored by Project of National Social Science Foundation(2014BZX084)
文摘Based on the analysis of the urban landscape and its composition,main problems of urban landscape at the early stage of urbanization were summarized,including more attention to the technical content of urban landscape,valuing transformation but belittling protection,emphasizing uniformity,ignoring the diversity,lack of scientific planning,and neglecting the value orientation. It is expected that the construction of urban landscape may return to its aesthetic value,practical value,ecological value and other aspects of value orientation. It is believed that the urban landscape is both a type of perception and experience. It can not only maintain the cultural heritage and the evolution of civilization,but also maintain the integration of the biological and physical environment,play the role of diversification in the urban public open space,and undertake social functions such as ecological,disaster prevention,waterlogging,and water conservancy at the same time of protecting and lighting the environment.
基金Sponsored by National Social Science Foundation of China(14BZX084)Teachers’Professional Ethics Education and Research Base of Hunan Provincial Institutes of Higher Education
文摘With the gradual improvement of living standard, the public demands on landscaping have focused more on quality than on quantity, and plant furnishing has grown from singular green plants to colored-leaf plants with multiple layers. Confi guration of colored-leaf plants follows certain principles and patterns to enrich the beauty of plant landscaping, construct colorful urban green spaces, satisfy increasing application and aesthetic needs of the public, and reflect value of plant landscaping.
文摘同带泵浦是目前实现高功率光纤激光器的主要技术之一。报道了一种自主研制的同带泵浦掺镱双包层光纤,采用改进的化学气相沉积工艺结合液相掺杂工艺,通过纤芯组分设计和制棒工艺优化,提高了高掺杂光纤纤芯折射率的均匀性。基于所研制的47μm/400μm光纤搭建了全光纤化主振荡功率放大器,采用同带泵浦方式,实现了高受激拉曼散射(SRS)抑制比的20.88 k W激光输出,中心波长为1080 nm,斜率效率为82.7%。这是目前国产光纤以同带泵浦方式实现的最高功率。
