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Tourism is a social and economic phenomenon, whose occurrence and development are also based on the spatial system as the material carrier. The spatial structure of tourism not only is the spatial state of tourism activities, but also reflects the spatial attributes and interrelationships of tourism activities. The detailed modeling and analysis of the spatial database in this paper is based on the spatial relational algebra. It formally defines the required spatial operation functions to accurately reflect the relationship between the spatial objects. On this basis, the storage level of the spatial geometric objects is established. The spatial index structure is used to analyze and design the spatial selection and the connection algorithm. In the filtering stage of the spatial connection, the plane scanning method is proposed, and in the refining stage, two heuristic strategies are proposed. Apply the above modeling and analysis method to the practice of the spatial distribution of tourism resources in Xi’an, abstract the application domains, extract the spatial geometric elements, and form the conceptual model.

A series of Co1−xZnxFe2O4 particulate nano-ferrites with x = 0, 0.2, 0.4, 0.5, 0.6, 0.7, and 0.8, fabricated by the co-precipitation method, have been investigated. The lattice parameter is found to increase and particle size decreases with increasing x. Mossbauer spectroscopy at room temperature exhibits ferromagnetic hyperfine splitting sextet peaks with a doublet peak overlapping at its center as Zn contents x