UPSS (urban power supply system) is a part of the region or the state power supply system. UPSS development is closely connected with region power supply system development as a whole. The decision of questions of l...UPSS (urban power supply system) is a part of the region or the state power supply system. UPSS development is closely connected with region power supply system development as a whole. The decision of questions of long-term and middle-term planning of UPSS development occurs in the conditions of incompleteness and uncertainty of the initial information. Nevertheless in these conditions the acceptance of development strategy should be based on perspective electric loads of urban TS (transformer substations). There are difficulties with a rational placement of substations in the city with the developed infrastructure. Such problem by theoretically grounded approach to rational formation of UPSS is solved. The hierarchical structure of the organizational construction, voltage levels and load densities is considered. The mathematical and geometrical modeling of service areas for transformer substations of different voltage is fulfilled. The method of graphic placement of transformer substations in the city territory for new substations at existing structure of networks is offered. The aim of the work is to present the new uniform approach which allows finding a rational decision for new substations' placement in cities with developed infrastructure on the beginning design stages in conditions of the information uncertainty. The calculation program Microsoft EXCEL and the graphic program AutoCAD are used for realization of method.展开更多
With the rapidly development of rural tourism, tourism e-commerce provides an internet platform for it that promotes the combination of e-tourism and rural tourism. Based on the research on electronic information serv...With the rapidly development of rural tourism, tourism e-commerce provides an internet platform for it that promotes the combination of e-tourism and rural tourism. Based on the research on electronic information services, website features and mode of operation of rural tourism, a case study was employed to develop rural e-commerce in Hainan where its topical website type and function were studied. In this paper, questionnaire was using to identify existing problems in the perceptions and expectations of rural tourism tourists website features module, we recommend B2B2C model is proposed to develop rural tourism e-commerce in Hainan.展开更多
文摘UPSS (urban power supply system) is a part of the region or the state power supply system. UPSS development is closely connected with region power supply system development as a whole. The decision of questions of long-term and middle-term planning of UPSS development occurs in the conditions of incompleteness and uncertainty of the initial information. Nevertheless in these conditions the acceptance of development strategy should be based on perspective electric loads of urban TS (transformer substations). There are difficulties with a rational placement of substations in the city with the developed infrastructure. Such problem by theoretically grounded approach to rational formation of UPSS is solved. The hierarchical structure of the organizational construction, voltage levels and load densities is considered. The mathematical and geometrical modeling of service areas for transformer substations of different voltage is fulfilled. The method of graphic placement of transformer substations in the city territory for new substations at existing structure of networks is offered. The aim of the work is to present the new uniform approach which allows finding a rational decision for new substations' placement in cities with developed infrastructure on the beginning design stages in conditions of the information uncertainty. The calculation program Microsoft EXCEL and the graphic program AutoCAD are used for realization of method.
文摘With the rapidly development of rural tourism, tourism e-commerce provides an internet platform for it that promotes the combination of e-tourism and rural tourism. Based on the research on electronic information services, website features and mode of operation of rural tourism, a case study was employed to develop rural e-commerce in Hainan where its topical website type and function were studied. In this paper, questionnaire was using to identify existing problems in the perceptions and expectations of rural tourism tourists website features module, we recommend B2B2C model is proposed to develop rural tourism e-commerce in Hainan.