Eco-tourism theories were taken as the instruction in this study,qualitative and quantitative research methods were also combined to investigate and conduct questionnaire processing to nearby residents of 10 eco-touri...Eco-tourism theories were taken as the instruction in this study,qualitative and quantitative research methods were also combined to investigate and conduct questionnaire processing to nearby residents of 10 eco-tourism scenic areas in south Shaanxi Province,so as to quantify and evaluate the various effects at different levels of eco-tourism development on tourism destinations in this region.Particularly,the quantitative value and weight value of economic,social and environmental effects were utilized to quantify,analyze and evaluate the comprehensive effects generated by eco-tourism development in south Shaanxi Province.It was found that the comprehensive effects were 'good',however,these 3 kinds of effects have not been coordinated well,thus the characteristics and requirements of eco-tourism have not been well demonstrated.展开更多
CuItivars K326, Yunyan 87 and Guiyan 4 were used to investigate the curing characteristics and suitabIe harvest maturity of fresh fIue-cured tobacco Ieaves in Ankang tobacco growing areas. ResuIts indicated that the w...CuItivars K326, Yunyan 87 and Guiyan 4 were used to investigate the curing characteristics and suitabIe harvest maturity of fresh fIue-cured tobacco Ieaves in Ankang tobacco growing areas. ResuIts indicated that the water Ioss of K326 was sIow,and the Ieaves were resistant to curing and reIative easiIy to cure. The water Ioss of Yunyan 87 and Guiyan 4 were quick, and the Ieaves with normal resistance to curing were reIative difficuIt to cure. For Guiyan 4, the shrinkage of CM1 maturity was the Iargest. For K326 and Yunyan 87, the shrinkages of CM2 maturity were the Iargest whiIe the shrinkage of CM1 maturity was the Iowest, but the difference did not reach statistical significance. The proportion of top-middIe-grade tobacco Ieaves and average price for K326 were the highest with XM2, CM2 and BM2 maturity, and for Yunyan 87 were XM1, CM3 and BM2 maturity. For K326, Ieaves with XM2, CM2 and BM2 maturity showed the balanced chemical components and the best smoking quality.展开更多
Utilization of urban underground space has become a vital approach to alleviate the strain on urban land resources,and to optimize the structure and pattem of the city.It is also very important to improve the city env...Utilization of urban underground space has become a vital approach to alleviate the strain on urban land resources,and to optimize the structure and pattem of the city.It is also very important to improve the city environment,build livable city and increase the capacity of the city.Based on the analysis of existing evaluation methods and their problems,a method for evaluating underground space resources based on a negative list of adverse factors affecting underground space development is proposed,to be primarily used in urban planning stages.A list of the adverse factors is established,including limiting factors,constraining factors and influencing factors.Taking Xi'an as an example,using a geographical information system platform,a negative list of adverse factors for the underground space resources in Xi'an City are evaluated,and preventive measures are proposed.Natural resources,exploitable resources,and the potential growth of exploitable underground space resources are evaluated.Underground space assessment in the different development stages of the city,collaborative utilization and safety evaluation for multiple subsurface resources,environmental impact and assessment,as well as evaluation methods based on big data and intelligent optimization algorithms are all discussed with the aim of serving city planning and construction.展开更多
THERE is a saying among Chinese virtuosos that Longquan is the best porcelain in the south,and Yaozhou is the finest in the north.Celadon Yaozhou ware with engraved motifs is lauded as the crown jewel of North China c...THERE is a saying among Chinese virtuosos that Longquan is the best porcelain in the south,and Yaozhou is the finest in the north.Celadon Yaozhou ware with engraved motifs is lauded as the crown jewel of North China celadon pottery.The kiln producing Yaozhou ware was located in Huangbao Town,Tongchuan City of Shaanxi Province.Production started in the Tang Dynasty(618-907),reached its zenith in Northern Song(960-1127).展开更多
文摘Eco-tourism theories were taken as the instruction in this study,qualitative and quantitative research methods were also combined to investigate and conduct questionnaire processing to nearby residents of 10 eco-tourism scenic areas in south Shaanxi Province,so as to quantify and evaluate the various effects at different levels of eco-tourism development on tourism destinations in this region.Particularly,the quantitative value and weight value of economic,social and environmental effects were utilized to quantify,analyze and evaluate the comprehensive effects generated by eco-tourism development in south Shaanxi Province.It was found that the comprehensive effects were 'good',however,these 3 kinds of effects have not been coordinated well,thus the characteristics and requirements of eco-tourism have not been well demonstrated.
基金Supported by Shanghai Tobacco(Group)Corporation(2011-00600)~~
文摘CuItivars K326, Yunyan 87 and Guiyan 4 were used to investigate the curing characteristics and suitabIe harvest maturity of fresh fIue-cured tobacco Ieaves in Ankang tobacco growing areas. ResuIts indicated that the water Ioss of K326 was sIow,and the Ieaves were resistant to curing and reIative easiIy to cure. The water Ioss of Yunyan 87 and Guiyan 4 were quick, and the Ieaves with normal resistance to curing were reIative difficuIt to cure. For Guiyan 4, the shrinkage of CM1 maturity was the Iargest. For K326 and Yunyan 87, the shrinkages of CM2 maturity were the Iargest whiIe the shrinkage of CM1 maturity was the Iowest, but the difference did not reach statistical significance. The proportion of top-middIe-grade tobacco Ieaves and average price for K326 were the highest with XM2, CM2 and BM2 maturity, and for Yunyan 87 were XM1, CM3 and BM2 maturity. For K326, Ieaves with XM2, CM2 and BM2 maturity showed the balanced chemical components and the best smoking quality.
基金This research is supported by National Key Research and Development Project,Ministry of Science and Technology of the People’s Republic of China(2018YFC1504700).
文摘Utilization of urban underground space has become a vital approach to alleviate the strain on urban land resources,and to optimize the structure and pattem of the city.It is also very important to improve the city environment,build livable city and increase the capacity of the city.Based on the analysis of existing evaluation methods and their problems,a method for evaluating underground space resources based on a negative list of adverse factors affecting underground space development is proposed,to be primarily used in urban planning stages.A list of the adverse factors is established,including limiting factors,constraining factors and influencing factors.Taking Xi'an as an example,using a geographical information system platform,a negative list of adverse factors for the underground space resources in Xi'an City are evaluated,and preventive measures are proposed.Natural resources,exploitable resources,and the potential growth of exploitable underground space resources are evaluated.Underground space assessment in the different development stages of the city,collaborative utilization and safety evaluation for multiple subsurface resources,environmental impact and assessment,as well as evaluation methods based on big data and intelligent optimization algorithms are all discussed with the aim of serving city planning and construction.
文摘THERE is a saying among Chinese virtuosos that Longquan is the best porcelain in the south,and Yaozhou is the finest in the north.Celadon Yaozhou ware with engraved motifs is lauded as the crown jewel of North China celadon pottery.The kiln producing Yaozhou ware was located in Huangbao Town,Tongchuan City of Shaanxi Province.Production started in the Tang Dynasty(618-907),reached its zenith in Northern Song(960-1127).
