The study of ecological security patterns (ESPs) is great significance for improving the value ecosystem services and promoting both protection high-quality socio-economic development. As an important part “Loss Plateau-Sichuan-Yunnan Ecological Barrier” “Northern Sand Control Belt” in national strategic pattern, there urgent need to ESPs on Loess Plateau. Based a remote sensing dataset, this i...

A ssessment of vision and prescription of low vision devices are part of a comprehensive low vision service. Other components of the service include training the person affected by low vision in use of vision and other senses, mobility, activities of daily living, and support for education, employment or leisure activities. Specialist vision rehabilitation agencies have services to provide acce...

Energy security, a fuzzy concept, has traditionally been used to justify state control over energy and a reluctance to deal with energy issues at global level. However, over time, the concept is acquiring different meanings that are applicable at different levels of governance. Many of the elements of the new definitions also imply a number of inherent contradictions. Against this background, t...

In spatial database, geographic information system (GIS) technology and system engineering theory, the hydro-ecological spatial database was built, and the corresponding hydro-ecological spatial database management information system was designed and developed. From aspects of the data organization and classification, the overall structure of the database, database construction processes and da...