远足
发表于 2025-3-30 09:19:54
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Visual-Field
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Campaign
发表于 2025-3-30 19:07:35
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讽刺
发表于 2025-3-30 23:43:49
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ALE
发表于 2025-3-31 04:23:49
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tattle
发表于 2025-3-31 06:43:17
Resonance and Celebrated Criminality,a conceptual schema of the database to a high-performance database schema in the model of the corresponding DBMS. Since the late 1970’s, various tools for database design have been introduced. Most of them, however, are dependent on the knowledge, comprehension and experience of the database analyst
Gene408
发表于 2025-3-31 11:32:07
https://doi.org/10.1007/978-3-030-44621-5ntly in database models. They express domain restrictions, specify relationships between components and state database behavior. The utilization depends on the richness of the type system used in the model. The relational model is using a simple type system and has a very large set of integrity cons
最高峰
发表于 2025-3-31 16:43:06
https://doi.org/10.1007/978-3-030-44621-5. On the one hand, modeling and querying nonstandard data may be unnatural in a traditional system, and on the other hand, the resulting inefficiency — such as a long response time to a geometric query — may render the system altogether useless. The management of geometric objects, for instance in C
N斯巴达人
发表于 2025-3-31 21:34:36
Celebrity and Mediated Social Connectionsy based access to spatial data are a crucial ingredient. Because of that, in the last years, a lot of data structures for storage of multidimensional non-point objects have been proposed in the literature (for an overview see our tutorial introduction in this volume). Almost all of these approaches
neutral-posture
发表于 2025-3-31 22:37:40
Celebrity and Mediated Social Connectionsts characterized by its position and shape in a given application-specific data space, like e.g. a set of polygons describing the boundaries of political subdivisions of a country. Because of the large number of applications, in which spatial data must be stored and processed, the number of GIS inst